CN100474065C - Light guide plate, light guide device, lighting device, light guide system, and drive circuit - Google Patents
Light guide plate, light guide device, lighting device, light guide system, and drive circuit Download PDFInfo
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- CN100474065C CN100474065C CNB2006100086277A CN200610008627A CN100474065C CN 100474065 C CN100474065 C CN 100474065C CN B2006100086277 A CNB2006100086277 A CN B2006100086277A CN 200610008627 A CN200610008627 A CN 200610008627A CN 100474065 C CN100474065 C CN 100474065C
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Abstract
A light guide plate 2 in accordance with the present invention includes a bend section 13 in which external light incident to a surface opposite a surface 11 a is turned into a direction from a surface 13 d to the surface 11 c by one reflection so that the light enters a light guide section 11 . Therefore, a light guide plate realized which is applicable in reducing the thickness of a backlight device and increasing the illumination surface of the backlight device in area.
Description
Technical field
The light that the present invention relates to inject guides in inside, and the light guide plate (guiding device), the lighting device with this light guide plate that penetrate from the face of regulation of the light that will guide, the light-conducting system with a plurality of above-mentioned light guide plate, and the driving circuit of above-mentioned lighting device.
Background technology
At present, known have a liquid crystal indicator.And, in this liquid crystal indicator, use from the back of the body irradiation of the behind irradiates light of liquid crystal panel.This back of the body irradiation has directly-below type and peripheral type.
In directly-below type back of the body irradiation, from behind by light sources such as fluorescent lights to milky white plate irradiates light.And, by the light diffusion equably on milky white plate that will shine, from the behind irradiates light of liquid crystal panel.
On the other hand, in peripheral type back of the body irradiation, be light guide plate with transparent acrylic panel, be provided with light source at the one end.And, utilize the multipath reflection of this light conductor inside, from the liquid crystal panel side of acrylic panel in the face of the liquid crystal panel irradiates light.
Figure 76 is the skeleton diagram of a section of the liquid crystal indicator of expression with peripheral type back of the body irradiation.Shown in figure, liquid crystal indicator 280 has the back of the body irradiation 281, reflector plate 282 and liquid crystal panel 283.In addition, back of the body irradiation 281 has edge light 291, transparent acrylic panel 292 and light scattering portion 293.
Below, will be incident as the face of acrylic panel 292 be made as surperficial 292a from the face of the light of edge light 291.In addition, will be made as surperficial 292b, surperficial 292c in turn from the liquid crystal panel side as the promptly parallel face of the face of acrylic panel 292 with the display surface of liquid crystal panel 283.And then the face of tossing about of the surperficial 292a of acrylic panel 292 is made as surperficial 292d.
Light (regulation light) Jie who sends from edge light 292 injects acrylic panel 292 by surperficial 292a.And the light of injecting acrylic panel 292 carries out total reflection repeatedly surface (292b292c) (being the interface), to the direction guiding of surperficial 292d.And then total reflection the part of light carry out scattering by the light scattering portion 293 that is located on the surperficial 292c.In this scattering light in, the light that total reflection does not take place on the surperficial 292b of acrylic panel 292 penetrates to liquid crystal panel 283 directions from surperficial 292b.
For example shown in Figure 77, light scattering portion 293 constitutes by the pattern that is made of a plurality of toroidal figures.In addition, the figure of above-mentioned toroidal with each center at certain intervals side by side, and apart from surperficial 292a position far away more, radius of a circle is set greatly more.In other words, apart from edge light 291 position far away, radius of a circle is set greatly more.This is because of following reason.
The light quantity of light of injecting acrylic panel 292 from edge light 291 is with being directed and reduce.Therefore, as mentioned above,, above-mentioned radius of a circle is increased, thus, can prevent the minimizing of scattering of light amount along with away from surperficial 292a.Therefore, can shine uniform light from surperficial 292b.Because such reason as mentioned above, and changes radius of a circle in turn.
In addition, in non-patent literature 1 " Nikkei エ レ Network ト ロ ニ Network ス 2004.12.20 P57-P62 ", shown in Figure 78,, disclose the structure of the back of the body irradiation 300 that uses LED as edge light.In this structure, will reflect by first catoptron 302 earlier from the light of LED301, first light guide plate 303 leads.Then, the light that will penetrate from this first light guide plate 303 is by 304 reflections of second catoptron, with this photoconduction that has reflected to second light guide plate 305 that is oppositely arranged with liquid crystal panel.
But, in above-mentioned existing directly-below type back of the body irradiation, be not as peripheral type back of the body irradiation, in the structure of milky white plate optical multiple reflector.Therefore, for obtaining the illumination light of enough and uniform luminance, and need make the distance of light source and milky white plate leave enough far.Therefore, there is the problem that is difficult to the liquid crystal indicator slimming.
In addition, in existing peripheral type back of the body irradiation, seek the slimming of liquid crystal indicator, but seek under the situation of maximization of acrylic panel 92 (that is, the situation that the L length of Figure 77 is increased) at light conducting direction, have following such problem points.
That is, when the radius that increases circle (being black circle in figure), the pattern before making it and seeking to maximize is identical, close surperficial 292d then from certain position, and the shape of above-mentioned circle is damaged fully, and existence can not be penetrated the problem of light equably from surperficial 292b.
In addition, shown in Figure 79, also consider to arrange a plurality ofly in a certain direction, seek to maximize by carrying on the back irradiation 281.But, in this case, be configuration edge light 291 between two acrylic panels, and be difficult to make the configuration consistency of respectively carrying on the back irradiation accurately in desirable position.
In addition, in non-patent literature 1, in the structure of record,, there is the problem points that is difficult to the slimming of device own owing to be the structure that the light from LED is repeatedly reflected.
Summary of the invention
The objective of the invention is to, light guide plate and guiding device applicable to the maximization of the light-emitting area of the slimming of back light device and back light device are provided, have described light guide plate or guiding device lighting device, have the light-conducting system of described light guide plate or guiding device, the driving circuit of described lighting device.
For achieving the above object, the invention provides light guide plate, it has the face guiding from the regulation light of predetermined direction incident along regulation, and penetrate outside light guide section from the face of described regulation, it is characterized in that having the turning part, this turning part is by primary event, to inject described light guide section from the exterior light of the opposing face side incident of described predetermined surface to described predetermined directional steering.
According to said structure, can will inject described light guide section from the exterior light of the opposing face side incident of predetermined surface to described predetermined directional steering by primary event by the turning part.In addition, can will be to above-mentioned predetermined directional steering by light guide section, the light of injecting light guide section injects to the outside from the face of regulation.
Therefore and since can by carry out primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide plate self slimming.
In addition, owing to make of the face guiding of afore mentioned rules light,, the light source that sends exterior light can be located near the described opposing face of light guide section so compare with the structure of the back of the body irradiation of existing directly-below type along regulation at light guide section.
Owing to needn't send the light source of exterior light,, can be easily be combined into the face of described regulation rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily light-emitting area be increased.
Therefore, can provide the slimming that is fit to back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
In addition, for achieving the above object, the invention provides light guide plate, it has the light from the 5th direction incident is guided along light-emitting area, and penetrates outside light guide section from described light-emitting area, it is characterized in that, have second, this second mask has: reflector space, and it is by carrying out primary event, to inject described light guide section from the exterior light of the opposing face side incident of described light-emitting area to described the 5th directional steering; Regional transmission, it makes the direction transmission of described exterior light to described light-emitting area side.
According to said structure, can be by second reflector space by carrying out primary event, will inject described light guide section from the exterior light of the opposing face side incident of light-emitting area to described the 5th directional steering.In addition, can will inject the light of light guide section to described the 5th directional steering from light-emitting area ejaculation outside by light guide section.
Therefore and since can by carry out primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with the slimming of light guide section own.
In addition, guide along light-emitting area,, the light source that sends exterior light can be located near the described opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type owing to making from the light of described the 5th direction incident at light guide section.
Owing to needn't send the light source of exterior light in the edge part setting of light guide plate,, can easily be combined into described light-emitting area rectangular so compare with the back of the body irradiation structure of existing peripheral type.Therefore, can be easily the light-emitting area of back light device be increased.
Therefore, can provide the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
For achieving the above object, the invention provides light guide plate, it has the guiding of the face along regulation from the light of the 6th direction incident, and penetrate outside light guide section from the face of described regulation, it is characterized in that, have: the turning part, it is by carrying out primary event, will be from the exterior light of the opposing face side incident of described predetermined surface to the 7th directional steering; Other light guide section, it will carry out total reflection to the exterior light of described the 7th directional steering, at inner leaded light, simultaneously, reflect to described the 6th direction, inject described light guide section by a plurality of reflectings surface, apart from the distance reflecting part far away more of described turning part, the area of reflecting part is set greatly more.
According to said structure, can be by the turning part by carrying out primary event, will be from the exterior light of the opposing face side incident of predetermined surface to the 7th directional steering.In addition, can utilize other light guide section, will reflect to the 6th direction to the exterior light of the 7th directional steering, inject described light guide section by a plurality of reflectings surface.In addition, can will inject the face ejaculation outside of the light of light guide section to the reflection of the 6th direction by light guide section from regulation.
Therefore and since can by carry out primary event with photoconduction to described other light guide section, so compare with the structure that repeatedly reflects, can be with the slimming of light guide plate own.
In addition, owing to make of the face guiding of described regulation light,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type along regulation at above-mentioned light guide section.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of described regulation rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily light-emitting area be increased.
Therefore, can provide the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
Other purpose of the present invention, feature and advantage can be more clear according to record as follows.In addition, advantage of the present invention can be understood by the following explanation with reference to accompanying drawing.
Description of drawings
Fig. 1 is the stereographic map of the light guide plate of present embodiment;
Fig. 2 is the figure of the configuration of expression LED;
Fig. 3 is AA ' the alignment pseudosection of above-mentioned light guide plate;
To be expression constitute the chart of relation at angle (α) on the liquid crystal side plane of light guide section from the radiation angle (ф) of the light of LED and the light path that incides the light after the light guide section surface to Fig. 4;
Fig. 5 is the sectional view of the light guide plate of other embodiment;
Fig. 6 is the chart that changes the relation of the above-mentioned ф of expression of the situation after the pitch angle on above-mentioned light guide section surface and α;
Fig. 7 is the stereographic map of the light guide plate of another embodiment;
Fig. 8 is the main enlarged drawing that the major part with light guide plate of reflecting plate has been amplified;
Fig. 9 is the figure of structure of the light guide plate of another embodiment of expression;
Figure 10 is the figure that expression has the light-emitting area of the light-conducting system that is configured to rectangular above-mentioned light guide plate;
Figure 11 is the figure of the driving circuit of the above-mentioned light-conducting system of expression;
Figure 12 is the figure of one of expression configuration photodiode example;
Figure 13 is the figure of another example of expression configuration photodiode;
Figure 14 is again the stereographic map of the light guide plate of other embodiment;
Figure 15 is the top figure of above-mentioned light guide plate;
Figure 16 is the major part enlarged drawing that the major part of above-mentioned light guide plate has been amplified;
Figure 17 is the figure of light path of the light of the above-mentioned light guide plate of expression;
Figure 18 is the figure of other light path of the light of the above-mentioned light guide plate of expression;
Figure 19 is expression by the path of the light of the turning part of light guide plate reflection and the light that this has reflected is injected the figure of the light path of the light behind the light guide section;
The figure of the β of Figure 19 that Figure 20 obtained when being expression with two surfaces of turning part to the light-emitting area projection of light guide section when being shaped as square and the relation of γ;
The β when length on the limit of the intersection direction that is shaped as above-mentioned two surfaces that Figure 21 obtained when being expression with two surfaces of turning part to the light-emitting area projection of light guide section is 1.5 times of length of other limit rectangle, Figure 19 and γ the figure of relation;
Figure 22 is the major part enlarged drawing that the major part of the above-mentioned light guide plate that comprises this light guide section during with the shape of light guide section that change to constitute above-mentioned light guide plate has been amplified;
The figure of each light emitting diode of configuration the when light emitting diode that Figure 23 is the expression light emitting diode that will send ruddiness, send the light emitting diode of green glow and send blue light is provided with two respectively;
Figure 24 is the figure of configuration each light emitting diode of expression when a light emitting diode that sends the light emitting diode of ruddiness and will send the light emitting diode of green glow and send blue light being set being provided with two respectively;
Figure 25 is the stereographic map of the light guide plate of present embodiment;
Figure 26 is the stereographic map as first parts of the component parts of light guide plate of Figure 25;
Figure 27 is the stereographic map as second parts of the component parts of light guide plate of Figure 25;
Figure 28 is the figure of expression configuration LED;
Figure 29 is AA ' the alignment pseudosection of the light guide plate of Figure 25;
Figure 30 is expression from the radiation angle (ф) of the light of LED and the chart of the light path of the light after inciding the light guide section surface and the relation at the angle (α) of the liquid crystal side plane formation of light guide section;
Figure 31 is AA ' the alignment pseudosection of the light guide plate of Figure 25, is the light of second parts is injected in expression via the regional transmission of second parts the figure of light path;
Figure 32 is AA ' the alignment pseudosection of the light guide plate of Figure 25, is the figure that is used to illustrate the size and the shape of this light guide plate;
Figure 33 is first light that sends from LED of expression, second light, and the chart of the in-position of use X coordinate representation each light of the 3rd light when arriving the base surface area of first parts;
Figure 34 is the stereographic map of the light guide plate of other embodiment;
Figure 35 is the major part enlarged drawing that the major part of light guide plate with structure of reflecting plate has been amplified;
Figure 36 is the major part enlarged drawing that the major part of the above-mentioned light guide plate that contains this light guide section during with the shape of light guide section that change to constitute above-mentioned light guide plate has been amplified;
Figure 37 is again the stereographic map of the light guide plate of other embodiment;
Figure 38 is BB ' the alignment pseudosection of the light guide plate of Figure 37, is the figure of light path of the light of this light guide plate of expression;
Figure 39 be as with the sectional view of the light guide plate of the comparison other of the light guide plate of Figure 37;
Figure 40 is BB ' the alignment pseudosection of the light guide plate of Figure 37, is the figure that is used to illustrate the size or the shape of this light guide plate;
The chart of the angle of emergence of Figure 41 light that to be expression penetrate from LED and the relation of the distance L x that face is supposed in in-position and the 4th;
Figure 42 is again the stereographic map of the light guide plate of other embodiment;
Figure 43 a is again the top figure of the light guide plate of other embodiment;
Figure 43 b is CC ' the alignment pseudosection of Figure 43 a;
Figure 44 is the figure of the light path of the light of expression when using the light guide plate that Figure 43 a and Figure 43 b represent;
Figure 45 a be as with the sectional view of the light guide plate of the comparison other of the light guide plate of Figure 42;
Figure 45 b be as with the sectional view of the light guide plate of the comparison other of the light guide plate of Figure 42;
Figure 46 a is the sectional view of the major part of the light guide plate represented of Figure 43 a and Figure 43 b;
Figure 46 b is EE ' the alignment pseudosection of Figure 46 a;
Figure 47 a is the enlarged drawing of the major part of the light guide plate represented of Figure 45 a and 45b;
Figure 47 b is FF ' the alignment pseudosection of Figure 47 a;
Figure 48 is the chart of the relation of the direction of light of the use angle when using the light guide plate of the light guide plate of Figure 42 and Figure 45 a and Figure 45 b respectively when representing the direction of light of sending from LED and inciding this light in the light guide plate;
Figure 49 is again the top figure of the light guide plate of other embodiment;
Figure 50 is again the top figure of the light guide plate of other embodiment;
Figure 51 a is again the top figure of the light guide plate of other embodiment;
Figure 51 b is GG ' the alignment pseudosection of Figure 51 a;
Figure 52 is the stereographic map of the light guide plate of present embodiment;
Figure 53 is the top figure of the light guide plate of Figure 52;
Figure 54 is the following figure of the light guide plate of Figure 52;
Figure 55 is the major part enlarged drawing that the turning part of above-mentioned light guide plate has been amplified;
Figure 56 is AA ' the alignment pseudosection of Figure 53;
Figure 57 is the major part enlarged drawing that one of light guide section with above-mentioned light guide plate has amplified;
Figure 58 is AA ' the alignment pseudosection of Figure 53;
Figure 59 represents to dispose the figure of LED;
Figure 60 is BB ' the alignment pseudosection of Figure 53, is the figure of the light path of expression light;
Figure 61 is expression from the radiation angle (ф) of the light of LED and the chart of the light path of the light after inciding the light guide section surface and the relation at the angle (α) of the liquid crystal side plane formation of light guide section;
Figure 62 a is figure above light guide section local of Figure 57, is the figure of one of the light path example of expression light;
Figure 62 b is DD ' the alignment pseudosection of Figure 62 a;
Figure 63 a is the top figure of part of the light guide section of Figure 57, is the figure of other example of light path of expression light;
Figure 63 b is EE ' the alignment pseudosection of Figure 63 a;
Figure 64 a is figure above light guide section local of Figure 57, is the figure of other example again of the light path of expression light;
Figure 64 b is FF ' the alignment pseudosection of Figure 64 a;
Figure 65 is CC ' the alignment pseudosection of Figure 53, is the figure of the light path of expression light;
Figure 66 is that AA ' alignment light guide plate and Figure 53 of other embodiment is looked the corresponding sectional view of section;
Figure 67 be above-mentioned ф of expression when changing the pitch angle on above-mentioned light guide section surface and α the chart of relation;
Figure 68 is the stereographic map of the light guide plate of other embodiment;
Figure 69 is the figure that expression has the light-emitting area of the light-conducting system that is configured to rectangular above-mentioned light guide plate;
Figure 70 is the figure of the driving circuit of the above-mentioned light-conducting system of expression;
Figure 71 is the figure of one of expression configuration photodiode example;
Figure 72 is the figure of other example of expression configuration photodiode;
Figure 73 is the stereographic map of the light guide plate of other embodiment;
The figure of each light emitting diode of configuration the when light emitting diode that Figure 74 is the expression light emitting diode that will send ruddiness, send the light emitting diode of green glow and send blue light is provided with two respectively;
Figure 75 is the figure of configuration each light emitting diode of expression when a light emitting diode that sends the light emitting diode of ruddiness and will send the light emitting diode of green glow and send blue light being set being provided with two respectively;
Figure 76 is the sectional view of the section of the existing liquid crystal indicator of expression;
Figure 77 is with the local figure that amplifies expression of the pattern of the diffusion part on the light guide plate of above-mentioned liquid crystal indicator;
Figure 78 is the sectional view of the section of existing other back of the body irradiation of expression;
Figure 79 is the sectional view of the section of expression when existing marginal mode back of the body irradiation is set up in parallel.
Embodiment
Below, with reference to Fig. 1～Figure 13 one embodiment of the invention are described.
Fig. 1 is the stereographic map of the schematic configuration of expression back of the body irradiation of the present invention, and shown in figure, back of the body irradiation (lighting device) 1 has light guide plate 2 and LED portion 3.In addition, shown in figure, light guide plate 2 has light guide section (first light guide section) 11, light guide section (second light guide section) 12 and turning part 13.Turning part 13 is clipped by light guide section 11 and light guide section 12.In addition, in the following description, for the convenience that illustrates, following describing makes light guide section 11 have symmetrical shape with light guide section 12 relative turning parts 13.
Turning part 13 has surperficial 13a～13e.Surface 13a is the face of liquid crystal panel side.Surface 13b is and the surperficial 11e of light guide section 11 and the adjacent face of surperficial 12e of light guide section 12 that surperficial 13c is and the surperficial 11f of light guide section 11 and the adjacent face of surperficial 12f of light guide section 12.In addition, surface (first reflecting surface) 13d is the face of LED portion 3 sides, and is the face adjacent with the surperficial 11c of light guide section 11.Surface (second reflecting surface) 13e is the face of LED portion 3 sides, and is the face adjacent with the surperficial 12c of light guide section 12.
13d is adjacent with surperficial 13e on the surface, and the surperficial 11c of the relative light guide section 11 of its intersection and the surperficial 12c of light guide section 12 are parallel.In addition, surperficial 13d and surperficial 13e are of similar shape.In addition, at face that will be vertical with surperficial 13a, promptly the face by above-mentioned intersection is made as under the situation of first imaginary plane, the angle (θ) that relative first imaginary plane with surperficial 13e of surperficial 13d tilts to stipulate along opposite direction respectively.
In addition, the inside of light guide section 11 and light guide section 12 is by the material of bootable light at least, and for example transparent propene material or glass constitute.The surperficial 13d of turning part 13 and surperficial 13e are made of catoptrical material (for example aluminium).In addition, for preventing the influence of the 13 pairs of light in turning part, by the material of printing opacity (for example whitewash) slightly, or the reflecting material (for example aluminium) of shading fully is when constituting surperficial 13d and surperficial 13e, preferably has from the turning part structure of a part of leak light of 13.
In addition, form a plane (below be called the liquid crystal side plane) by the surperficial 12a of the surperficial 13a of the surperficial 11a of light guide section 11, turning part 13, light guide section 12.In addition, above-mentioned liquid crystal side plane has rectangular shape.And the plane of above-mentioned liquid crystal side will be parallel with above-mentioned intersection the length on limit be made as L1, the length on limit that will be vertical with above-mentioned intersection is made as L2.
The surperficial 11b of light guide section 11 and the surperficial 12b of light guide section 12 have the pattern of the regulation that is used to make light scattering.The pattern that this pattern is for example shown in Figure 26.In addition, this pattern is not limited to above-mentioned pattern, can be known various pattern.As long as above-mentioned pattern is far away more apart from surperficial 11c and surperficial 12c, and the figure of pattern is big more to get final product.Below above-mentioned figure is called light scattering portion.In addition, in surperficial 11b, the zone of removing light scattering portion is called non-scattering region.
Secondly, explanation makes the light path of this light of the luminous situation of LED portion 3 with reference to Fig. 3.In addition, because light guide plate 2 be the shape of the above-mentioned relatively first imaginary plane symmetry, so following light path to the light that is sent to light guide section 11 sides describes.Fig. 3 is AA ' the alignment pseudosection of Fig. 1.
Shown in figure, the light that above-mentioned relatively first imaginary plane penetrates from LED portion 3 with the angle (ф) of regulation is by the surperficial 13d reflection of turning part 13.And this light (regulation light) that has reflected is injected light guide section 11 via surperficial 11c.At this moment, light reflects by surperficial 11c.And, inject the light of light guide section 11 and carry out total reflection at the non-scattering region (being the interface) of surperficial 11a and surperficial 11b, enter in the light guide section 11.And then in the light of above-mentioned incident, the light of scattering part that shines surperficial 11b is by this scattering part scattering.And in the light of this scattering, the light in not total reflections such as surperficial 11a does not penetrate from surperficial 11a.Thus, can be to the liquid crystal panel irradiates light.
In addition, the light that penetrates from LED portion 3, also have, and directly inject light guide section 11 from surperficial 11a not in surperficial 13d total reflection.
Fig. 4 be the above-mentioned ф angle of expression and inject surperficial 11c after the figure of relation at the angle that constitutes, light path (P1 of Fig. 3) and the above-mentioned liquid crystal side plane of the light light of surperficial 11c refraction (promptly by) (below be called first angle [alpha]).In addition, in figure, the value of above-mentioned θ is made as 45 °.At this, under the situation about being made of the propylene material of refractive index 1.5 in light guide section 11, when above-mentioned first angle roughly surpassed 48 °, then at the surperficial 11a11b (interface) of light guide section 11, light did not carry out total reflection.But, in said structure, as shown in Figure 4, even ф is maximal value (being roughly 38 ° at this), also can total reflection take place at the surperficial 11a11b of light guide section 11.
As mentioned above, above-mentioned α value changes according to above-mentioned ф value.Therefore, the light that penetrates from LED portion 3 is by the scattering part scattering that is in diverse location.In addition, far away more apart from surperficial 11c and surperficial 12c, the ratio in zone of scattering part that accounts for surperficial 11b is big more.Therefore, can be from the roughly uniform light of surperficial 11a irradiation.Particularly if, then can shine uniform light by calculating the pattern of the optimum scattering part of simulation in advance.
Because reason same as described above, thereby can shine uniform light from the surperficial 12a of light guide section 12.
In addition, if electricity sees through inside and surperficial 13a that the parts of the light identical with the inside of light guide section 11 constitute turning part 13, then also can carry out the light of scattering etc. by light guide section 11 inside from surperficial 13a irradiation.At this moment, can be from 2 pairs of more uniform light of liquid crystal panel side irradiation of light guide plate.
In said structure, constitute the surperficial 13d and the 13e of turning part 13 by reflective material.But, if be the part of surperficial 13d13e, and constitute the inside of turning part 13 by the parts that see through the light identical with light guide section 11 etc. by the material of printing opacity, then also can directly 13 surperficial 13a penetrates from the turning part with the light from LED portion 3.At this moment, can uniform light further be shone the liquid crystal panel side from light guide plate 2.
In addition, in said structure, because as the LED of light source use, so when the value that makes above-mentioned L1 is excessive, then be difficult to penetrate uniform light from surperficial 11a and surperficial 12a as pointolite.On the other hand, because light reaches leaded light in the light guide section 12 light guide section 11 in, and surperficial 11b and surperficial 13b have pattern as described above, so that the value of above-mentioned L2 can become to a certain extent is big.That is, owing to use LED portion 3, so for to penetrate uniform light from surperficial 11a and surperficial 12a, therefore, preferably the above-mentioned liquid crystal side plane with light guide plate 2 is made as elongated shape.At this moment, light guide plate 2 as columned fluorescent light work as the area source that is bordering on line source.
As above, light guide plate 2 have with from the regulation light of predetermined direction (from the direction of surperficial 13b) incident towards surperficial 13c along surface (face of regulation) 11a leaded light, and this light is injected to outside light guide section 11 from surperficial 11a, and have by carrying out primary event, to inject the turning part 13 of light guide section 11 from the exterior light of the opposing face side incident of surperficial 11a to above-mentioned predetermined directional steering.
According to this structure, can be by turning part 13 by carrying out primary event, will inject light guide section 11 from the exterior light of the opposing face side incident of surperficial 11a to above-mentioned predetermined directional steering.In addition, can will be to above-mentioned predetermined directional steering by light guide plate 11, the light of injecting light guide section 11 injects to the outside from surperficial 11a.
Therefore and since can be by primary event with photoconduction to light guide section 11, so compare with the structure that repeatedly reflects, can be with light guide plate 2 self slimming.
In addition, owing to make afore mentioned rules light along surperficial 11a leaded light,, the LED (light source) 3 that sends exterior light can be located near the above-mentioned opposing face of light guide plate 2 so compare with the structure of the back of the body irradiation of existing directly-below type at light guide section 11.In addition, because LED portion 3 needn't be set at the edge part of light guide plate 2,, can easily be combined into the face (being the liquid crystal side plane) that constitutes by above-mentioned surperficial 11a rectangular so compare with the back of the body irradiation structure of existing peripheral type.Therefore, can easily light-emitting area be strengthened.
Therefore, light guide plate 2 constitutes the slimming that is applicable to back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
In addition, light guide plate 2 have with from the regulation light of predetermined direction (from the direction of reflecting surface 13e) incident towards surperficial 12c along surface (face of regulation) 12a guiding, and 2 penetrate outside light guide section 2 from the surface, and this light guide plate has by carrying out primary event, will be from the exterior light of the opposing face side incident of the surperficial 12a turning part 13 to the direction of light guide section 12 and above-mentioned predetermined directional steering.At this moment, also obtain effect same as described above.
According to this structure, can carry out primary event respectively by turning part 13, will turn to above-mentioned first direction and second direction from the exterior light of the opposing face side incident of surperficial 11a12a.
Therefore, can penetrate light from light guide section 11 and the light guide section 12 that is positioned at 13 both sides, turning part.
In addition, light guide plate 2 also can be following structure, turning part 13 has surface (first reflecting surface) 13d and the surperficial 13e (second reflecting surface) with the reflection of said external light, above-mentioned surperficial 13d turns to said external light to above-mentioned first direction, and surperficial 13e turns to said external light to above-mentioned second direction.
According to this structure, can said external light be turned to above-mentioned first direction by surperficial 13d.In addition, can said external light be turned to above-mentioned second direction by surperficial 13e.Therefore, can constitute turning part 13 with simple structure.
In addition, light guide plate 2 also can be following structure, above-mentioned surperficial 13d and surperficial 13e are identical shaped, and adjacent, simultaneously, form trequetrous two sides, when will owing to the above-mentioned adjacent line that forms as intersection, and with the vertical face of above-mentioned surperficial 11a12a (liquid crystal side plane), and the face that comprises above-mentioned intersection is when being made as first imaginary plane (certain surface), 13d relative first imaginary plane with surperficial 13e in surface is identical angle (above-mentioned θ), tilts to different mutually directions.
According to this structure,, can be made as light quantity identical by the surperficial 13d and the light of surperficial 13e reflection by the direction irradiation exterior light of a certain position on first imaginary plane to above-mentioned liquid crystal side plane.Therefore, can be to the light of light guide section 11 and the identical light quantity of light guide section 12 incidents as afore mentioned rules light.
In addition, light guide plate 2 is for having the structure that makes the symmetrical shape of light guide section 11 and light guide section 12.
According to this structure, light guide section 11 and light guide section 12 have symmetrical shape.Therefore, compare for the situation of asymmetrical shape with light guide section 12 with light guide section 11, can be with the designs simplification of light guide plate 2.
For increasing from the light quantity that surperficial 11a and surperficial 12a penetrate, preferably with surperficial 11d, surperficial 11e, surperficial 11f, surperficial 12d, surperficial 12e, and surperficial 12f be made as scattering or catoptrical structure.For example, also can constitute above-mentioned each face by the coating (film) of white.
If with surperficial 11b and surperficial 12b subtend and the structure of mounting reflector plate, then can further increase the light quantity that penetrates from surperficial 11a and surperficial 12a.
But, in above-mentioned light guide plate 2, constitute the surperficial 11c that makes light guide section 11 and the vertical structure in the above-mentioned relatively liquid crystal side of surperficial 12c plane of light guide section 12.But be not limited thereto, for example shown in Figure 5, also can make surperficial 11c towards will tilting to above-mentioned relatively first imaginary plane of direction of the direction refraction on above-mentioned liquid crystal side plane by the light that surperficial 13d turn to (reflection), and make surperficial 12c towards the light that will turn to (reflection) by surperficial 13e to above-mentioned relatively first imaginary plane inclination of the direction of above-mentioned liquid crystal side in-plane refraction.Specifically, the angle that also surperficial 11c and surperficial 13d can be constituted becomes the value bigger than θ with surperficial 12c with the dihedral that surperficial 13e constitutes.Below, the angle of inclination of above-mentioned relatively first imaginary plane is made as δ.
At this, Fig. 6 represents the value of above-mentioned θ is made as 45 °, above-mentioned α the when value of above-mentioned δ is changed and the relation of ф.
Shown in figure, when the value that makes above-mentioned δ was big, then the value of above-mentioned α also increased.That is, when the value that makes δ is big, then the incident angle to above-mentioned surperficial 11a and surperficial 12a incident can be reduced.In addition, shown in figure, even be made as 45 ° in the value with above-mentioned δ, above-mentioned ф obtains peaked situation, also the value of α must be made as more than 48 °.That is can total reflection take place on the surface of light guide section 11 and light guide section 12.
Therefore, increase the value of above-mentioned δ, can reduce incident angle to surperficial 11a and surperficial 12a incident.Therefore, can be in surperficial 11b and surperficial 12b, by the light scattering of the scattering part of more close turning part 13 with guiding.Therefore, can penetrate more uniform light from surperficial 11a and surperficial 12a.
In addition, increase the value of above-mentioned δ, can will reach the increased frequency of the total reflection in the light guide section 12 in the light guide section 11.Therefore, the light of incident scattering part and scattering increases.Therefore, can penetrate light from surperficial 11a and surperficial 12a effectively.
Like this, light guide plate 2 is with the light guide plate of above-mentioned regulation light from surface (first face) the 11c incident of light guide section 11, be following structure, make surperficial 11c towards with the above-mentioned exterior light that turns to the direction of the direction of the surperficial 11a refraction face tilt vertical relatively with surperficial 11a.In addition, light guide plate 2 is with the light guide plate of afore mentioned rules light from surface (first face) the 12c incident of light guide section 12, be following structure also, make surperficial 12c towards with the above-mentioned exterior light that turns to the direction of the direction of the surperficial 12a refraction face tilt vertical relatively with surperficial 12a.
In addition, in above-mentioned light guide plate 2, light guide section 11 and light guide section 12 form rectangular shape, but are not limited thereto.For example shown in Figure 7, also can dip plane 11g and dip plane 12g be set at light guide section 11 and light guide section 12, they are respectively with surperficial 11b and 11d and surperficial 12b and 12d is adjacent, be made of the scattering material of catoptrical reflecting material and scattered light, and the plane of above-mentioned relatively liquid crystal side is oblique towards surperficial 11c side and surperficial 12c inclination respectively.
At this moment, relevant light guide section 11 sides, light guide plate 2 is with the light guide plate of afore mentioned rules light from surface (first face) the 11c incident of above-mentioned light guide section 11, it is following structure, when with the end of the light guide section 11 of the opposing face of surperficial 11c during as terminal part, then terminal part has dip plane 11g, and this dip plane is the face that is coated with the scattering material of catoptrical reflecting material and scattered light, and apparent surface 11a is oblique to surperficial 11c inclination.
According to this structure, on the 11g of dip plane, the light that is directed to terminal part does not penetrate to the outside from terminal part, and at least to light guide section 11 lateral reflections or scattering.Therefore, can effectively utilize exterior light.Therefore, compare, the light quantity that penetrates from surperficial 11a can be increased with the situation that does not have dip plane 11g.In addition, the situation of light guide section 12 sides is also identical with above-mentioned light guide section 11.
In addition, dip plane 11g and dip plane 12g can be set also, and relative as mentioned above above-mentioned first imaginary plane of surperficial 11c and surperficial 12c is tilted.
As shown in Figure 8, preferably surperficial 13b and the surperficial 13c in turning part, light guide section 2 upper edge 13 is provided with reflecting plate 19 in LED portion 3 directions.At this moment, can this reflecting plate 19 even be set with for example by the light of the surperficial 13b of turning part 13 and surperficial 13c reflection, the light of the surperficial 12c of then inevitable surperficial 11c that does not inject light guide section 11 and light guide section 12 is sent to light guide section 11 and light guide section 12.
Therefore, more light from 3 ones in LED portion is sent to light guide section 11 and light guide section 12.Therefore, can shine more light by liquid crystal panel.
In addition, under the situation of the structure that relative as mentioned above first imaginary plane of surperficial 11c and surperficial 12c tilts, also can reflecting plate 19 be extended along the direction of surperficial 11e and surperficial 12e (or surperficial 11f and surperficial 12f) for preventing, for example the light by surperficial 13d reflection does not pass through in the light guide section 11, and the structure of directed outwards.At this moment, also same as described above, can shine more light by liquid crystal panel.
But, in above-mentioned light guide plate 2, illustrated that light guide section 11 is identical shape with light guide section 12, but be not limited thereto.Even the surperficial 11a of light guide section 11 is different with the area of the surperficial 12a of light guide section 12, also can make the light quantity of the per unit area that penetrates from surperficial 11a and surperficial 12a identical by the pattern that changes surperficial 11b and surperficial 12b.Therefore, in this case, also uniform illumination can be mapped to the liquid crystal panel side.
In addition, even limiting the situation of the position of LED portion 3, also can penetrate light from surperficial 11a12a by the size that changes light guide section 11 and light guide section 12.
In the above-described embodiments, owing to used pointolite, thus need reduce the value of above-mentioned L1, but when using line source and elongated area source to replace above-mentioned LED portion 3, the value of above-mentioned L1 is become greatly.Therefore, under the situation of this structure, can increase the area of the light-emitting area (surperficial 11a and surperficial 12a) of light guide plate.Below, for the convenience that illustrates, make its light guide plate bigger be called light guide plate 2 ' value that increases above-mentioned L1 than the value of light guide plate 2.
At this moment, as shown in Figure 9, can use light guide plate 2 as above-mentioned elongated area source.In this structure, at first, will be made as the uniform elongated planar light of light quantity that makes per unit area by light guide plate 2 from the light of LED portion 3.And, by light guide plate 2 ' this planar light is further widened.Thus, can use pointolite that the irradiates light of square (for example square) of different shape is shone on the display panels.
Below, for the convenience that illustrates, as mentioned above, the structure of light guide plate (first light guide plate) 2 and light guide plate (second light guide plate) 2 ' combination is called light guide plate (guiding device) 20.In addition, the part with the light guide plate 2 ' of the corresponding light guide section 11 of light guide plate 2 and light guide section 12 is made as light guide section 11 ' and light guide section 12 '.
In addition, light guide plate 22 ' also can be by for example processing (cutting) plate (acrylic panel etc.), and then carry out surface treatment etc. and make integratedly.
Secondly, as shown in figure 10, to rectangular (driving circuit and the driving method of each LED during n * m) describe in that above-mentioned light guide plate 20 is configured to.In the following description, light guide plate 20 note of matrix is made light guide plate Pij (1≤i≤n, 1≤j≤m).
As shown in figure 11, driving circuit 30 corresponding each light guide plate Pij have LED portion 3.That is, each light guide plate Pij has red LED, green LED respectively, reaches blue led relatively.In addition, each light emitting diode is configured in position shown in Figure 2.With the order of RGB each light emitting diode of corresponding Pij is made as rij, gij, bij below.
In addition, driving circuit 30 has constant pressure source 31, constant pressure source 32, on-off element QriQgbi, first control device 33 and not shown second control device.First control device 33 has on-off element SrjSgjSbj and storage part 33a and the 33b of current supply portion.Below, describe as the situation of on-off element QriQgbi and on-off element SrjSgjSbj using transistor.
Be configured to a plurality of LED portion of rectangular a plurality of light guide plate, corresponding each light guide plate, light-conducting system that the structure of driving circuit combination is equivalent in claims is identical.In addition, first control device is equivalent to the interior control device of being put down in writing of claims.
Constant pressure source 31 via on-off element Qri to red LED ri1, ri2, ri3 ..., each input side terminal of rim applies certain voltage.In addition, constant pressure source 32 via on-off element Qgbi to on-off element gi1, gi2, gi3 ..., each input side terminal of gim, and on-off element bi1, bi2, bi3 ..., each input side terminal of bim applies certain voltage.
In addition, on-off element QriQgbi is for example by making the base stage (B) from this element of current direction of second control device, and comes the electric current of automatic constant voltage source 3132 from collector (C) the side emission utmost point (E) side inflow.In addition, on-off element Qri and on-off element Qgbi (that is, the element of identical i sequence number) with the base stage inflow current of identical arrangement of time to these two elements, and form conducting state by second control device simultaneously.Second control device is made as conducting state simultaneously with adjacent on-off element Qri+1Qgbi+1 after on-off element QriQgbi is made as nonconducting state from conducting state.
Secondly, first control device 33 is described.
Store the information of the magnitude of current of the time per unit of relevant each element base stage of all on-off element SrjSgjSbj (being 3m element) expression inflow at storage part 33a.
The 33b of current supply portion is owing to make whole on-off element SrjSgjSbj (being 3m element) simultaneously for conducting state, so the base stage of whole on-off element SrjSgjSbj is flow through electric current simultaneously.At this moment, the not shown control part of the 33b of current supply portion is according to the above-mentioned magnitude of current that is stored in above-mentioned each on-off element of information decision inflow in the storage part 33a.That is, the control part of the 33b of current supply portion flows through the electric current of decision respectively to each on-off element.
Each on-off element SrjSgjSbj then makes electric current that should the magnitude of current from collector (C) effluent to emitter (E) side when above-mentioned current direction base stage.
In addition, even light emitting diode is the element that sends same color light, the characteristic of the light that it sends (for example brightness and form and aspect) is also different.Therefore, according to the characteristic of each light emitting diode each light emitting diode is stipulated that each light emitting diode sends the magnitude of current by predetermined light quantity of all kinds, and be stored in advance in the storage part 33a by information with relevant this particular current amount, can make full-luminous diode of all kinds (for example red, ri1, ri2, ri3 ... rim) send uniform light quantity by decision of all kinds.
Therefore, each LED portion 3 of corresponding each light guide plate Pij can send the white light of same amount at time per unit.Therefore, can penetrate uniform white light from each light guide plate Pij.
In addition, light emitting diode in time and deterioration reduces the light quantity when luminous.Therefore, the structure of first control device 33 is made as the structure that has as lower module, that is, make three light emitting diodes (rij, gij, bij) of light guide plate Pij luminous under arrangement of time separately, make three light emitting diodes also luminous under arrangement of time separately each light guide plate.In addition, relatively LED3 is in the position of regulation, corresponding each LED portion 3, and the signal transformation that produces when having lumination of light emitting diode becomes the photodiode (inverting element) of electric signal.
The structure of first control device 33 is made as following structure, and when being received in the above-said current signal that each photodiode obtains, the control part of the 33b of current supply portion changes according to the information that the semaphore that receives will be stored in storage part 33a.Specifically, make first control device 33 actions by above-mentioned pattern, the minimizing of the semaphore of corresponding above-mentioned reception, above-mentioned control part changes above-mentioned information, flows to the magnitude of current of the base stage of each on-off element SrjSgjSbj with raising.
According to this structure, even under the situation of light emitting diode deterioration, the light quantity that also can in scope to a certain degree light emitting diode be sent increases.
At this moment, above-mentioned control part preferably changes above-mentioned information, so that light emitting diode of all kinds is at least with being identical light quantity on of the same colour.Thus, can always shine uniform light to the display panels side.
In the above description, each LED portion 3 is provided with photodiode, but is not limited thereto.For example shown in Figure 12, also can be the time with adjacent two light guide plate combination, have a photodiode with every group, be located at above-mentioned adjacent portions.At this moment, owing to can reduce the sum of photodiode, so can reduce the manufacturing cost of driving circuit 30.
In addition, for example shown in Figure 13, also can be when four light guide plate combinations that will be configured to two row two row, have a photodiode with every group, be located at the central part of the light guide plate that constitutes above-mentioned group.At this moment, owing to can further reduce the sum of photodiode, so can further reduce the manufacturing cost of driving circuit 30.
In Figure 11, represented to drive the example of green LED and blue led, but be not limited thereto by same circuit.For example, replace on-off element Qgbi, also can drive the structure of green LED and blue led respectively for each such color component of on-off element Qgi and on-off element Qbi is set.
Below, with reference to Figure 14～Figure 22 other embodiments of the invention are described.In addition, for the convenience that illustrates, the parts with the parts identical function shown in the drawing with the foregoing description 1 use identical symbol, omit its explanation.
As Figure 14 and shown in Figure 15, the light guide plate 40 of present embodiment has turning part 13, light guide section (other light guide section first light guide section) 41, light guide section (other light guide section second light guide section) 42, light guide section (the 3rd light guide section) 43, reaches light guide section (the 4th light guide section) 44.In addition, light guide section 41 and light guide section 42 have the symmetrical shape in relative turning part 13.In addition, light guide section 43 and light guide section 44 have the symmetrical shape of relative turning part 13, light guide section 41 and light guide section 42.Therefore, below, except that local position, the explanation of omitting relevant light guide section 42 and light guide section 44.
Below, with reference to Figure 16, each face of light guide section 41 that will be corresponding with the surperficial 11a～surperficial 11f of above-mentioned light guide section 11 is made as surperficial 41a～surperficial 41f respectively.In addition, each face of light guide section 42 that will be corresponding with the surperficial 12a～12f of above-mentioned light guide section 12 is made as surperficial 42a～42f respectively.In addition, surperficial 41a and surperficial 42a are equivalent to the face of the regulation that claim puts down in writing.In addition, with each surface of light guide section 43 and light guide section 44, promptly the face as the liquid crystal panel side is called surperficial 43a and surperficial 44a respectively.In addition, this surface 43a and surperficial 44a are equivalent to the face of the regulation that claim puts down in writing respectively.
As shown in figure 14, the thickness (thickness vertical with surperficial 41a) with light guide section 41 is made as d.In with figure, expression makes thickness (thickness of with surperficial 43a vertical direction) the thin structure of the thickness of light guide section 41 than light guide section 43.
As Figure 14 and shown in Figure 15, each reflecting plate 41r141r2 apparent surface 41a vertically disposes.In addition, each reflecting plate 41r has the relative line parallel with this one side with the rectangle that with an edge lengths is d, promptly passes through the identical shape of shape of line (center line) warpage at this rectangle center.In addition, reflecting plate 41r141r2 relatively with surperficial 41e and the parallel face of surperficial 41f, and about with 41 binary of light guide sections (below be called second imaginary plane) symmetry.
Below, as shown in figure 16, from LED portion 3 will be vertical with the surperficial 13a of turning part 13 direction, and the direction of surperficial 13a is made as the Z direction.
At this, the light path of the light of light guide plate 40 is described with reference to Figure 17 and Figure 18.In addition, the position of LED portion 3 and turning part 13 relation is identical with embodiment 1.In addition, the light path of following note is an example that is used to illustrate, but is not limited thereto.
As shown in figure 17, the light that penetrates to a certain direction from LED portion 3 surperficial 13d reflection of 13 in the turning part.And the light of this reflection is for example by with the light path (1) of figure, enters light guide section 41 from the surperficial 41c of light guide section 41.And this light carries out total reflection at surperficial 41a and surperficial 41b (interface), by the light path (2) with figure.When light passed through light path (2), shown in figure, light was by reflecting plate 41r1 reflection, by the light path (3) with figure, towards surperficial 41e.In addition, the light that arrives surperficial 41e incides light guide section 43 by the light path (4) (promptly by clearance portion 45) with figure.
In addition, same as described above from LED portion 3 shown in figure to the light that other a certain direction penetrates, 13 the surperficial 13d reflection in the turning part, and also the light of this reflection with the light path (11) of figure, enters light guide section 41 from the surperficial 41c of light guide section 41 by for example.And this light does not carry out total reflection, and by light path (12) the guide surface 41e with figure.The light that arrives surperficial 41e carries out total reflection at surperficial 41e, by light path (13) the guide surface 41f with figure.At this moment, in light path (13), light carries out total reflection at surperficial 41a and surperficial 41b.
And then the light that arrives surperficial 41f carries out total reflection at surperficial 41f, by with the light path (14) of figure guide surface 41e once more.In this light path (14), light also carries out total reflection at surperficial 41a and surperficial 41b.
Then, arrive the light of surperficial 41e by light path (15) with figure.When light passed through light path (15), shown in figure, light was by reflecting plate 41r2 reflection, by light path (16) the guide surface 41e with figure.And then the light that arrives surperficial 41e is injected light guide section 43 by the light path (17) (promptly by clearance portion 45) with figure.
As above, the light of injecting light guide section 43 is identical with the light guide section 11 ' of above-mentioned light guide section 2 ', carries out total reflection by the surface (interface) of light guide section 43, and by the pattern scattering of being located at LED portion 3 sides.Consequently, can be to the liquid crystal panel side irradiates light of the opposition side of LED portion 3.In addition, the light of injecting light guide section 43 is equivalent to be recorded in the regulation light of claim.
In addition, further same as described above from LED portion 3 shown in figure to the light that other a certain direction penetrates, by the surperficial 13d reflection of turning part 13.And the light of this reflection with the light path (21) of figure, enters light guide section 41 from the surperficial 41c of light guide section 41 by for example.And this light does not carry out total reflection, and by the light path (22) with figure, guide surface 41f.In addition, the light that arrives surperficial 41f carries out total reflection at surperficial 41f, by light path (23) with figure, and guiding reflecting plate 41r1.To the light of reflecting plate 41r1 in reflecting plate 41r1 reflection, by with figure light path (24) guide surface 41f.Then, the light that arrives surperficial 41f is by the light path (25) (promptly passing through clearance portion) with figure, incides on the light guide section 44 of opposition side of light guide section 43.In addition, the light path of injecting behind the light guide section 44 is omitted explanation.The light of injecting light guide section 44 is identical with the light of injecting light guide section 43, is equivalent to be recorded in the regulation light of claim.
But as shown in figure 18, the light that further penetrates to other a certain direction from LED portion 3 is by the surperficial 13d reflection of turning part 13.And the light of this reflection is by for example entering light guide section 41 with the light path (31) of figure from the surperficial 41c of light guide section 41.And this light does not carry out total reflection on the surface of light guide section 41, and by the light path (32) with figure, penetrates the liquid crystal panel side from surperficial 41a.Like this, also have at light guide section 41 and do not carry out total reflection, and the light that directly penetrates from surperficial 41a.
In addition, shown in figure, the light that further penetrates to other a certain direction from LED portion 3 is by the surperficial 13d reflection of turning part 13.And the light of this reflection is for example by the light path (41) with figure, and not by in the light guide section 41, and incident is to the protuberance 43s of light guide section 43.Like this, also have and do not pass through light guide section 41, and be directly incident on the light of light guide section 43.
At this, as shown in figure 19, the angle that light path that the light apparent surface 11a that will penetrate from LED portion 3 obtains when above-mentioned Z direction projection and the second above-mentioned imaginary plane constitute is made as second angle (β).In addition, will be by the light of the surperficial 13d reflection of turning part 13, promptly incide the angle that light path that the light apparent surface 11a behind light guide section 41 or the protuberance 43s obtains and the second above-mentioned imaginary plane constitute and be made as third angle degree (γ) when above-mentioned Z direction projection.
At this, the shape that obtains when light guide plate 40 has surperficial 13b and surperficial 13e apparent surface 13a to above-mentioned Z direction projection (below be called projection of shape) is under the situation of foursquare turning part 13, and the relation of above-mentioned second angle and third angle degree is described.
At this moment, as shown in figure 20, reach 45 ° to second angle (β), the pass of third angle degree (γ) and second angle (β) is γ=K * β (K is a proportionality constant).But, ° formation critical point in β=45, the rate of change of γ sharply rises at this point.And when β surpassed 45 °, the pass of β and γ was γ=K * β+C (C is a constant).In addition, in figure, when β surpassed 45 °, γ reached the value more than 61 °.
In addition, have under the situation of above-mentioned projection of shape for the such turning part 13 of rectangle of regulation, the relation of above-mentioned second angle and third angle degree is described in light guide plate 40.In addition, in above-mentioned rectangle, the limit parallel with above-mentioned intersection direction has 1.5 times the length on other limit vertical with this limit.
At this moment, as shown in figure 21, when second angle (β) reached 63.5 °, the pass of third angle degree (γ) and second angle (β) was γ=K * β (K is a proportionality constant).But, ° formation critical point in β=63.5, the rate of change of γ rises rapidly at this point.And when β surpasses 63.5 °, then the pass of β and γ is γ=K * β+C.In addition, in figure, when β surpassed 63.5 °, γ reached the value more than 72 °.
Like this, by setting the limit parallel, can send into more light to light guide section 41 than above-mentioned other the length of side with above-mentioned intersection.But, when the limit parallel with above-mentioned intersection is long, then,, therefore, preferably above-mentioned parallel limit is made as below certain length so the zone from the surperficial 13d13e of the light of 3 ones in LED portion is not shone in generation because LED portion 3 be a pointolite.
In addition, also the shape of light guide section 41 and light guide section 42 can be made as the such shape of surperficial 13b13c of encirclement turning part 13 shown in Figure 22.
In addition, be made as different values, the light path of the light of light guide section 41 and light guide section 42 and the amount that incides the light of each light guide section 4142 can be changed by value with above-mentioned d.
As above, light guide plate 40 has light guide section 43, it will be from predetermined direction (from the surface of surperficial 41e towards light guide section 43, and the direction with the surface of surperficial 41e subtend) the regulation light of incident is along surface (face of regulation) 43a leaded light, simultaneously, by carrying out primary event, inject to it outside from surperficial 43a, this light guide plate is for having the structure of turning part 13 and light guide section (other light guide section) 41, wherein, turning part 13 is by carrying out primary event, will be from the exterior light of the opposing face side incident of surperficial 43a directional steering to regulation, light guide section 41 will carry out total reflection to the exterior light of the directional steering of afore mentioned rules, by inner leaded light, and by reflecting plate 41r1 and reflecting plate 41r2 with it to above-mentioned predetermined directional steering, incide light guide section 43.In addition, the position of reflecting plate 41r1 and reflecting plate 41r2 is equivalent to be recorded in a plurality of assigned positions of claim.
According to this structure, can be by turning part 13 by carrying out primary event, will be from the exterior light of the opposing face side incident of surperficial 43a directional steering to regulation.In addition, can by light guide section 41 will be to the exterior light of the directional steering of regulation by reflecting plate 41r141r2 to predetermined directional steering, incide light guide section 43.And then, can will be to this predetermined directional steering by light guide section 43, the light that incides light guide section 43 penetrates to the outside from the face of regulation.
Therefore and since can be by primary event with photoconduction to light guide section 41, so compare with the structure that repeatedly reflects, can be with the slimming of light guide plate own.
In addition, owing to the face of afore mentioned rules light along regulation guided,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type at light guide section 43.In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate 40.Thus, can easily light-emitting area be increased.
Therefore, light guide plate 40 is the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
In addition, utilize light guide section 41 with exterior light by reflecting plate 41r141r2 at least to the direction of light guide section 43, and above-mentioned predetermined directional steering.Therefore, even under the situation that pointolite (LED) is used as the light source that sends exterior light, also can be to the light of light guide section 43 incident wire as afore mentioned rules light.In addition, can penetrate the light of this wire as planar light from the face of afore mentioned rules by light guide section 43.
Therefore, on light guide section 40, can use pointolite as the light source that sends exterior light.
In addition, light guide plate 40 have with from predetermined direction (from the surface of surperficial 41f towards light guide section 43, and the direction with the surface of surperficial 41f subtend) the regulation light of incident is along surface (face of regulation) 44a guiding, simultaneously, it is injected to outside light guide section 44 from surperficial 44a, this light guide plate also can be for having the structure of turning part 13 and light guide section (other light guide section) 41, wherein, turning part 13 is by carrying out primary event, will be from the exterior light of the opposing face side incident of surperficial 44a directional steering to regulation, light guide section 41 will carry out total reflection to the exterior light of the directional steering of afore mentioned rules, guide in inside, and by reflecting plate 41r141r2 with it at least to the direction of light guide section 44, and above-mentioned predetermined directional steering.At this moment, also reach effect same as described above.
In addition, light guide plate 40 has light guide section (first light guide section) 41 and light guide section (second light guide section) 42, light guide section 41 and light guide section 42 clip turning part 13 configurations, turning part 13 also can be the structure that said external light is turned to first direction and second direction, wherein, first direction is the direction of afore mentioned rules, and becomes the direction of light guide section 41, second direction is the direction of afore mentioned rules, and becomes the direction of light guide section 42.
According to this structure, can will turn to above-mentioned first direction and second direction from the exterior light of opposing face side incident of surface (face of regulation) 43a44a respectively by carrying out primary event respectively by turning part 13.
Therefore, can be via two light guide sections 4142 that are positioned at 13 both sides, turning part each surperficial 43a44a ejaculation light from light guide section 4344.
In addition, light guide plate 40 has light guide section (the 3rd light guide section) 43 and light guide section (the 4th light guide section) 44, light guide section 43 and light guide section 44 clip turning part 13, light guide section 41, reach light guide section 42 configurations, 42 two light guide sections of light guide section 41 and light guide section can for will be at the light of above-mentioned inner guiding to third direction and four directions to the structure that turns to, wherein, third direction is above-mentioned predetermined direction, and direction as light guide section 43, the four directions is to being above-mentioned predetermined direction, and as the direction of light guide section 43.
According to this structure, can by light guide section 41 will be at the light of above-mentioned inner guiding to third direction and four directions to turning to, wherein, third direction is above-mentioned predetermined direction, and as the direction of light guide section 44, the four directions is to being above-mentioned predetermined direction, and as the direction of light guide section 44.In addition, by light guide section 42, equally can be with the light of above-mentioned inner guiding to above-mentioned third direction and above-mentioned four directions to turning to.
Therefore, can via two light guide sections 4142 from be positioned at turning part 13, light guide section 41, and each surperficial 43a44a of two light guide sections 4344 of light guide section 42 both sides penetrate light.
In addition, concerning light guide plate 2 of the foregoing description 1 and the light guide plate 40 of embodiment 2, as shown in Figure 2, used LED portion 3, but be not limited thereto with three light emitting diodes.For example shown in Figure 23, also can light emitting diode of all kinds be configured in the position of above-mentioned relatively intersection symmetry for two red LED, green LED, blue led are set respectively.
In addition, LED portion 3 also can have the light-emitting diode structure of two other colors for having the light emitting diode of a monochrome (for example R).At this moment, as shown in figure 24, as long as green LED and blue led are configured in the position of above-mentioned relatively intersection symmetry.
In the foregoing description 1 and 2, two surperficial 13d of use turning part 13 and surperficial 13e reflect the light from 3 ones in LED portion, but are not limited thereto.
For example, if reflection then also can be the curved surface except that the bottom surface of circular cone from the structure of LED portion 3.Can also be four faces except that the bottom surface of quadrangular pyramid.
In addition, in the foregoing description 1 and 2, above-mentioned surperficial 13d and surperficial 13e are made of catoptrical material efficiently, but needn't use above-mentioned material to constitute by the whole zone at above-mentioned surperficial 13d and surperficial 13e.Be 13 inside, turning part of directly to lead from the part of the light of 3 ones in LED portion, also can have the zone that constitutes by above-mentioned material and the pattern that constitutes of the zone of this material not.
In above-mentioned, use LED as pointolite (light-emitting component), but be not limited thereto, also can use the light source except that LED.
Also can replace pointolite along above-mentioned intersection layout line light source.
As follows, with reference to Figure 25～Figure 36 one embodiment of the invention are described.
Figure 25 is the stereographic map of the schematic configuration of expression back of the body irradiation of the present invention.Shown in figure, back of the body irradiation (lighting device) 101 has light guide plate 102 and LED portion 103.Shown in figure, light guide plate 102 has light guide section (the 5th light guide section) 111, light guide section (the 6th light guide section) 112, first parts 113, reaches the 4th parts 114.First parts 113 and second parts 114 are clipped by light guide section 111 and light guide section 112.In addition, in the following description, for the convenience that illustrates, following describing, light guide section 111 and light guide section 112 have relative first parts 113 and the symmetrical shape of second parts 114.
In addition, but the inside of light guide section 111 and light guide section 112 is by the material of leaded light at least, and for example propylene material or glass material constitute.
As shown in figure 26, first parts 113 have the roughly shape of rectangular parallelepiped.First parts 113 have surperficial 113a～113d.
In addition, on first parts 113, near surperficial 113d, has a plurality of scatterers (scattering device) 113m....This scatterer 113m... is as if the light scattering that will shine on this scatterer, and then shape and material etc. are not particularly limited.In addition, the configuration of scatterer 113m also is not particularly limited.Wherein, preferably dispose equably along surperficial 113c.
As shown in figure 27, second parts 114 have surperficial 114a～114h.Surface (second face) 114a is the face of LED portion 103 sides, and is the face with the surperficial 111c adjacency of light guide section 111.In addition, surface (second face) 114b is the face of LED portion 103 sides, and is the face with the surperficial 112c adjacency of light guide section 112.
In addition, surperficial 114g and surperficial 114h adjacency, the surperficial 111c of the relative light guide section 111 of its intersection and the surperficial 112c of light guide section 112 are parallel.And surperficial 114g and surperficial 114h are of similar shape.In addition, this intersection belongs to the 3rd imaginary plane.And, the angle (θ 2) that relative the 3rd imaginary plane with surperficial 114h of surperficial 114g tilts to stipulate respectively towards reverse direction mutually.
As Figure 25 and shown in Figure 27, surperficial 114a and surperficial 114b have reflector space M1 and regional transmission M2 respectively.In the time of will being called second by the face that surperficial 114a and surperficial 114b constitute, in the example of Figure 25, three regional transmission M2 are set up in parallel near near second the central portion.In addition, the quantity of regional transmission M2 without limits, the position about setting also can not be limited to above-mentioned position.
In addition, surperficial 114a, surperficial 114b, surperficial 114g, and surperficial 114h be equivalent to be recorded in the reflection unit of claim respectively.
But the inside of first parts 114 and second parts 114 also is made of the material of leaded light.In addition, the reflector space M1 of the surperficial 114a114b of second parts 114 and surperficial 114g114h are made of catoptrical material (for example aluminium).On the other hand, above-mentioned regional transmission M2 is made of the material that can see through light.For example, constitute by the material identical with the material of the inside of second parts 114.
In addition, in making second parts 114, for example acrylic panel is made as shape shown in Figure 27, then, needs only position AM aluminum metallization at the reflector space M1 that is equivalent to surperficial 114a and surperficial 114b.In addition, also can be in the zone that is equivalent to reflector space M1 and regional transmission M2 (being surperficial 114a and 114b) AM aluminum metallization, then, remove the aluminium in the zone that is equivalent to regional transmission M2.
In addition, on light guide plate 2, form a plane (below be called the liquid crystal side plane) by the surperficial 112a of the surperficial 113c of the surperficial 111a of light guide section 111, first parts 113, light guide section 112.In addition, above-mentioned liquid crystal side plane has rectangular shape.Below, in above-mentioned liquid crystal side plane, the length on limit that will be parallel with above-mentioned intersection is made as L1, and the length on limit that will be vertical with above-mentioned intersection is made as L2.
The surperficial 111b of light guide section 111 and the surperficial 112b of light guide section 112 have the pattern of the regulation that is used to make light scattering.This pattern exemplifies the pattern shown in Figure 77.In addition, this pattern is not limited to above-mentioned pattern, can be known various pattern.As long as above-mentioned pattern is big more apart from the figure of surperficial 111c and surperficial 112c formation pattern far away more.Below above-mentioned figure is called light scattering portion.In addition, in surperficial 111b, the zone of removing light scattering portion is called non-scattering region.
Secondly, explanation makes the light path of this light of the luminous situation of LED portion 103 with reference to Figure 29.In addition, because light guide plate 102 be the shape of above-mentioned relatively the 3rd imaginary plane symmetry, so following light path to the light that is sent to light guide section 111 sides describes.Figure 29 is AA ' the alignment pseudosection of Figure 25.
At first, to the light that penetrates from LED portion 103, promptly the light path by the light of the reflector space M1 reflection of the surperficial 114a of second parts 114 describes.
Shown in figure, the light that above-mentioned relatively the 3rd imaginary plane penetrates from LED portion 3 with the angle of stipulating (φ), and the light (regulation light) that is reflected by reflector space M1 incides light guide section 111 via surperficial 111c.At this moment, light is turned to by surperficial 111c.And, inject the light of light guide section 111 and carry out total reflection at the non-scattering region (being the interface) of surperficial 111a and surperficial 111b, enter in the light guide section 111.And then in the light of above-mentioned incident, the light of scattering part that shines surperficial 111b is by this scattering part scattering.And in the light of this scattering, the light of total reflection does not penetrate from surperficial 111a on surperficial 111a etc.Thus, can be to the liquid crystal panel irradiates light.
In addition, the light that penetrates from LED portion 103, can't help surperficial 114a reflection, and directly inject light guide section 111 from surperficial 111c.
Figure 30 be the above-mentioned φ angle of expression and inject surperficial 111c after the light path (P1 of Figure 27) of the light light of surperficial 111c refraction (promptly by) constitute the figure of relation at the angle (below be called the 4th angle [alpha]) on above-mentioned liquid crystal side plane.In addition, in figure, the value of above-mentioned θ 1 is made as 45 °.At this, under the situation about being made of the propylene material of refractive index 1.5 in light guide section 111, when above-mentioned the 4th angle surpassed roughly 48 °, then at the surperficial 111a111b (interface) of light guide section 111, light did not carry out total reflection.But, even in said structure as shown in figure 28 φ be maximal value (being roughly 38 °) at this, can total reflection take place at the surperficial 111a111b of light guide section 111 also.
As mentioned above, above-mentioned α value changes according to above-mentioned φ value.Therefore, the light that penetrates from LED portion 103 is by the scattering part scattering that is in diverse location.In addition, far away more apart from surperficial 111c and surperficial 112c, the ratio in zone of scattering part that accounts for surperficial 111b is big more.Therefore, can be from the roughly uniform light of surperficial 111a irradiation.Particularly if, then can shine uniform light by calculating the pattern of the optimum scattering part of simulation in advance.
Because reason same as described above, thereby also can shine uniform light from the surperficial 112a of light guide section 112.
In said structure, because the LED that uses pointolite is as light source, so, then be difficult to penetrate uniform light from surperficial 111a and surperficial 112a when the value of above-mentioned L1 being set when too much.On the other hand, because light reaches leaded light in the light guide section 112 light guide section 111 in, and surperficial 111b and surperficial 112b have pattern as described above, so the value of above-mentioned L2 can be increased to a certain degree.That is, owing to use LED portion 3, so penetrate uniform light from surperficial 111a and surperficial 112a, therefore, preferably the above-mentioned liquid crystal side plane with light guide plate 102 is made as elongated shape.
Secondly, with reference to the light of Figure 31 to penetrating from LED portion 103, promptly the light path of the light of the regional transmission M2 of surperficial 114a by second parts 114 and 114b describes.
Promptly, in exterior light, have to remove and reflect by surperficial 114a by light path (101) to surperficial 114a or surperficial 114b irradiation, incide beyond the light of light guide section 111 by light path (102), not by the light (inciding the light of second parts 114 via regional transmission M2) of surperficial 114a or surperficial 114b reflection.This light is described.In addition, because light guide plate 102 be the shape of above-mentioned relatively the 3rd imaginary plane symmetry, so following light path to the light of sending into light guide section 112 sides describes.
For example pass through light path (103) (104) from the light of regional transmission M2 incident.
And M2 reflects light by this regional transmission.At this, refractive index for example is made as 1.5.
In this refract light, some light incides the brightened dot position of first parts 113 by with the light path shown in the figure (105) via the surperficial 113d of first parts 113.And the light that incides these first parts 113 is by scatterer 113m scattering.And the light of this scattering injects to the liquid crystal panel side by a plurality of light paths from surperficial 113c.The light that will do not reflected by surperficial 114b and surperficial 114h is called first light like this, below.
In above-mentioned refract light, other light carries out total reflection by with the light path shown in the figure (106) at surperficial 114h.In addition, by the 114h total reflection of this surface light by with the light path (108) of figure, incide the brightened dot position of first parts 113 via the surperficial 113d of first parts 113.And the light that incides these first parts 113 is by scatterer 113m scattering, then, this scattering light by a plurality of light paths, incide the liquid crystal panel side from surperficial 113c.Like this, will reflect by surperficial 114h below, and the light that is not reflected by surperficial 114b is called second light.
In above-mentioned refract light, other light carries out total reflection by with the light path shown in the figure (107) at surperficial 114h again.In addition, by the 114h total reflection of this surface light by with the light path (109) of figure, carry out total reflection at surperficial 114b.Then, in the 114b total reflection of this surface light by with the light path (110) of figure, incide the brightened dot position of first parts 113 via the surperficial 113d of first parts 113.And the light that incides these first parts 113 is by scatterer 113m scattering, and then, the light of this scattering incides the liquid crystal panel side by a plurality of light paths from surperficial 113c.To be called the 3rd light by the light of surperficial 114h and surperficial 114b reflection like this, below.
In addition, in said structure, to incide the light of second parts 114 via regional transmission M2, promptly the light by surperficial 114h total reflection is that example is illustrated, but incide the light of second parts 114 via regional transmission M2, and by the light of surperficial 114g total reflection also by above-mentioned light path.
As above, on light guide section 2, owing to can will incide light scattering on second parts 114 via regional transmission M2 by scatterer 113m, thus compare with the structure of this scatterer 113m not, can be from surperficial 113c equably to the liquid crystal panel irradiates light.
In addition, in light, the surperficial 113c side that does not advance to first parts 113 is arranged also, and advance to the light of second parts, 114 sides by scatterer 113m scattering.That is, also there is the light that returns once more in second parts 114.But the major part of these light by surperficial 114a114b and/or surperficial 114g114h secondary reflection again, is injected first parts 113 via the surperficial 113d of first parts 113 once more on second parts 114.Therefore, by in advance surperficial 114a114b and surperficial 114g114h being made as catoptrical structure, can be effectively penetrating from seeing through regional M2 and incide light on second parts 114 from the surperficial 113c of first parts 113.
In addition,, have not by scatterer 113m scattering injecting in the light of second parts 114 via seeing through regional M2, and from the light of surperficial 113c ejaculation to the liquid crystal panel side.
In Figure 31, shown in arrow Q, the distance of surface 111b and surperficial 113d is 4.0mm, as shown by arrow I, the top, top 170 of second parts and the distance of surperficial 113d are 2.5mm, and as shown by arrow J, the intersection of surperficial 114g and surperficial 114h and the distance of surperficial 113d are 0.7mm, shown in arrow Z, the scope of brightened dot position is 3.0mm.
In with figure, represent the vertical line of falling of intersection with surperficial 113d from surperficial 114a and surperficial 114b by dot-and-dash line.As shown in figure 31, the angle (V) that this dot-and-dash line and surperficial 114b constitute is 50 °, and the angle (W) that dot-and-dash line and surperficial 114h constitute is 45 °.Wherein, an above-mentioned distance and angle simple example only.
Below, the light that LED portion 3 is sent, and the result that the simulation of the light by regional transmission M2 arrives the position of surperficial 114f describes.
Below, shown in figure 32, will be by the center of LED portion 103 and the center of light guide plate 102, the section of first light guide plate vertical with the 3rd imaginary plane is called first section.In first section, obtain coordinate axis X in the normal direction of the 3rd imaginary plane.In addition, for the convenience that illustrates, set the initial point of X-axis in the 3rd imaginary plane.In addition, the direction with surperficial 112c is made as positive dirction.
The distance of the surperficial 111b of surperficial 113d of first parts 113 (forming in detail, the face of scatterer 113m...) and light guide section 111 is made as L3.Shown in figure, with the intersection of surperficial 114a and surperficial 114b, be made as L4, with the intersection of surperficial 114g and surperficial 114h, be made as L5 with the distance of surperficial 113d with the distance of surperficial 113d.In addition, the distance with the 3rd imaginary plane and surperficial 112c (or surperficial 111c) is made as L6.
In addition, be made as S at the total area with two regional transmission M2, when the projected area to 114f of surperficial 114a was made as S1, S was the value of following formula (1) expression for example.
S＝2×S1/(L1×L2)...(1)
At this, be that example describes with the situation of L3=4mm, L4=2.5mm, L5=0.7mm, L6=3mm.At this moment, θ 1=50 °, θ 2=45 °.In addition, one of regional transmission M2 be positioned at LED portion 3 under.
Figure 33 is the chart (analog result) of the in-position of use above-mentioned X coordinate representation each light of above-mentioned first light, second light, the 3rd light when arriving surperficial 114f in first section regional.In more detail, the calculating among Figure 33 is with from the light of LED portion 103 result from the plane incident on the top, top 170 (with reference to Figure 31) of second parts 114.
In addition, represent that with the transverse axis of chart along the luminous position of the LED portion 103 of X-axis, the longitudinal axis is represented the above-mentioned in-position along X-axis.With figure expression the refractive index of light guide section 111112 is made as 1.5 situation.
Shown in figure,, and be that the in-position of above-mentioned the 3rd light is made as the position that is bordering on 3mm with the light of the luminous position of-0.3mm.That is, the 3rd light arrives the zone of the surperficial 114f the intersection of surperficial 114b and surperficial 112c near.In addition, as chart as can be known, any one light of first～the 3rd light arrives the zone of the surperficial 114f of first section at least.
As above, light guide plate 2 have with from from surperficial 114a towards the light of direction (the 5th direction) incident of surperficial 111c along surperficial 111a (light-emitting area) leaded light, and inject to outside light guide section 111 from surperficial 111a, it is for having the structure of surperficial 114a (second face), wherein, surface 114a has reflector space M1 and regional transmission M2, reflector space is by carrying out primary event, to turn to above-mentioned the 5th direction from the exterior light of the opposing face side incident of surperficial 111a, incide light guide section 111, regional transmission makes the direction of said external light transmission light-emitting area side.
According to this structure, can will inject light guide section 111 from the exterior light of the opposing face side incident of surperficial 111a to above-mentioned the 5th directional steering by carrying out primary event by the reflector space M1 of surperficial 114a.In addition, can will be to above-mentioned the 5th directional steering by light guide section 111, the light of injecting light guide section 111 injects to the outside from surperficial 111a.
Therefore and since can by carry out primary event with photoconduction to light guide section 111, so compare with the structure that repeatedly reflects, can be with light guide plate 102 slimmings own.
In addition, on light guide section 111,,, the LED portion (light source) 103 that sends exterior light can be located near the above-mentioned opposing face of light guide plate 102 so compare with the back of the body irradiation structure of existing directly-below type owing to will guide along surperficial 111a from the light of above-mentioned the 5th direction incident.
In addition, because LED portion 103 needn't be set at the edge part of light guide plate 102,, can easily be combined into the face (being the liquid crystal side plane) that constitutes by surperficial 111a rectangular so compare with the back of the body irradiation structure of existing peripheral type.Therefore, can easily combination there be the light-emitting area of the device (back light device) of a plurality of back of the body irradiations 1 to increase.
Therefore, light guide plate 102 constitutes the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
In addition, in light guide plate 102, can make the direction transmission of exterior light by the regional transmission M2 of surperficial 114a to surperficial 111a side.Therefore, also can said external light be penetrated to surperficial 111a from surperficial 114a side.Therefore, surface 114 is compared with the light guide plate that is only formed by reflector space M1, can penetrate uniform light to surperficial 111a side.
In addition, light guide plate 102 is for having the light that will see through via the regional transmission M2 structure to scatterer (scattering device) 113m... of the direction scattering of surperficial 111a side (being surperficial 113c).
According to this structure, the light that can will be seen through via regional transmission by scatterer 113m... is to the scattering of surperficial 113c direction.Therefore, compare with the light guide plate of the structure that does not have scatterer 113m..., can be from the more uniform light of surperficial 111a side irradiation.In addition, also identical in light guide section 112 sides.
According to this structure, can will reflect via the light that regional transmission M2 sees through by surperficial 114a114g.And then can be by surperficial 114a114g with the direction of the above-mentioned photoconduction that sees through to surperficial 111a side.
Therefore, compare, can see through the light of this regional transmission M2, be i.e. the optical path length lengthening of the light that penetrates from light guide plate with the structure of the light guide plate of the surperficial 114a114g that does not have such reflection function.Therefore, compare with the structure of the light guide plate of the surperficial 114a114g that does not have above-mentioned functions, can be from the more uniform light of light-emitting area side irradiation.In addition, also identical in light guide plate 112 sides.
In addition, on light guide plate 2, the face (second face) that is made of surperficial 114a and surperficial 114b is to have the structure of a plurality of regional transmission M2.According to this structure, compare with the light guide plate of the structure that only has a regional transmission M2, can be from the more uniform light of light-emitting area irradiation.
According to this structure, can respectively will be from the exterior light of the opposing face side incident of surperficial 111a112a to the 5th light guide section direction and the 6th light guide section directional steering by carrying out primary event by surperficial 114a114g.Therefore, can penetrate light from the 5th light guide section 111 and the 6th light guide section 112 that is positioned at surperficial 114a114g both sides.
In said structure, be that example is illustrated with the structure that scatterer 113m is arranged on first parts 113, but also it can be arranged near the surperficial 114e114f of second parts 114.
In addition, increase for making, and preferably surperficial 111d, surperficial 111e, surperficial 111f, surperficial 112d, surperficial 112e, surperficial 112f are made as the structure that makes light scattering or reflection from surperficial 111a and surperficial 112a quantity of light emission.For example, also can constitute above-mentioned each face by the coating (film) of white.
In addition, if the mounting reflector plate makes the structure of itself and surperficial 111b and surperficial 112b subtend, then can further increase the light quantity that penetrates from surperficial 111a and surperficial 112a.
In above-mentioned light guide plate 102, light guide section 111 and light guide section 112 have been made as rectangular shape, but have been not limited thereto.For example shown in Figure 34, also dip plane 111g and dip plane 112g can be set on light guide section 111 and light guide section 112, wherein, dip plane 111g and dip plane 112g are respectively with surperficial 111b and 111d and surperficial 112b and 112d adjacency, the face that constitutes by the scattering material of catoptrical reflecting material or scattered light, and above-mentioned relatively liquid crystal side plane is oblique to surperficial 111c side and surperficial 112c inclination respectively.
At this moment, relevant light guide section 111 sides, light guide plate 102 is with the light guide plate of exterior light from the surperficial 111c incident of above-mentioned light guide section 111, be following structure, when with the end of the light guide section 111 of the opposing face of surperficial 111c during as terminal part, then terminal part has dip plane 111g, and this dip plane is the face that is coated with the scattering material of catoptrical reflecting material or scattered light, and apparent surface 111a is oblique to surperficial 111c inclination.
According to this structure, on the 111g of dip plane, the light that is directed to terminal part does not penetrate to the outside from terminal part, and arrive the major general its to light guide section 111 lateral reflections or scattering.Therefore, can effectively utilize exterior light.Therefore, compare, the light quantity that penetrates from surperficial 111a can be increased with the situation that does not have dip plane 111g.In addition, the situation of light guide section 112 sides is also identical with above-mentioned light guide section 111.
In addition, as shown in figure 35, preferably surperficial 114c and the surperficial 114d at light guide section 102 upper edges second parts 114 is provided with reflecting plate 119 in LED portion 103 directions.At this moment, can be with for example by the light of the reflecting surface M1 reflection of the surperficial 114a of second parts 114 and 114b, the light that the surperficial 112c of inevitable surperficial 111c that does not incide light guide section 111 of 119 of this reflecting plates and light guide section 112 even is not set is sent to light guide section 111 and light guide section 112.
Therefore, can further increase light, it is sent to light guide section 111 and light guide section 112 from 103 ones in LED portion.Therefore, can shine more light by liquid crystal panel.
In addition, in above-mentioned light guide plate 102, illustrated that light guide section 111 is identical shape with light guide section 112, but be not limited thereto.Even the surperficial 111a of light guide section 111 is different with the area of the surperficial 112a of light guide section 112, also can make the light quantity of the per unit area that penetrates from surperficial 111a and surperficial 112a identical by the pattern that changes surperficial 111b and surperficial 112b.Therefore, in this case, also uniform illumination can be mapped to the liquid crystal panel side.
In addition, even limiting the situation of the position of LED portion 103, also can penetrate light from surperficial 111a112a by the size that changes light guide section 111 and light guide section 112.
But, in the above-described embodiments, owing to used pointolite, thus need reduce the value of above-mentioned L1, but when using line source and elongated area source to replace above-mentioned LED portion 103, can be with the value increase of above-mentioned L1.Therefore, under the situation of this structure, can increase the area of the light-emitting area (surperficial 111a and surperficial 112a) of light guide plate.
In addition, also the shape of light guide section 111 and light guide section 112 can be made as the shape of the surperficial 114a114b of encirclement shown in Figure 36 second parts 114.
As follows, with reference to Figure 37～Figure 42 other embodiment of the present invention is described.In addition, for the convenience that illustrates, the parts that have same function with the surface shown in the drawing of the above embodiments 3 use identical symbol, omit its explanation.
Figure 37 is the stereographic map of the schematic configuration of expression back of the body irradiation of the present invention.Shown in figure, back of the body irradiation (lighting device) 101 ' has light guide plate 102 ' and LED portion 103.Shown in figure, light guide plate 102 ' has light guide section 111, light guide section 112, reaches turning part 115.In addition, turning part 115 is clipped by light guide section 111 and light guide section 112, that is, light guide plate 102 ' replaces first parts 113 shown in the embodiment 3 and the structure of second parts 114 for having turning part 115.
Turning part 115 has surperficial 115a～115g.Surface 115a is the face of liquid crystal panel side.Form a plane (below be called the liquid crystal side plane) by the surperficial 112a of the surperficial 115a of the surperficial 111a of light guide section 111, turning part 115, light guide section 112.In addition, surperficial 115b is the face with the surperficial 112e adjacency of the surperficial 111e of light guide section 111 and light guide section 112, and surperficial 115c is the face with the surperficial 112f adjacency of the surperficial 111f of light guide section 111 and light guide section 112.
Surface (reflecting surface the 3rd reflecting surface) 115d is the face of LED portion 103 sides, and is the face with the surperficial 111c adjacency of light guide section 111.In addition, surface (reflecting surface the 3rd reflecting surface) 115e is the face of LED portion 103 sides, is the face with the surperficial 112c adjacency of light guide section 112.In addition, surperficial 115d and surperficial 115e are of similar shape.
Surface (reflecting surface the 4th reflecting surface) 115f is the face of LED portion 103 sides, and is the face with surperficial 115d adjacency.In addition, surface (reflecting surface the 4th reflecting surface) 115g is the face of LED portion 103 sides, is the face with surperficial 115e adjacency.In addition, surperficial 115f and surperficial 115g adjacency, the surperficial 111c of the relative light guide section 111 of its intersection and the surperficial 112c of light guide section 112 are parallel.In addition, surperficial 115f and surperficial 115g are of similar shape.Surface 115d, surperficial 115e, surperficial 115f, and surperficial 115g constitute by catoptrical material (for example aluminium).
At this, at face that will be vertical with surperficial 115a, when the face that promptly comprises above-mentioned intersection was made as the 4th imaginary plane, as shown in figure 38, relative the 4th imaginary plane with surperficial 115e of surperficial 115a was mutually along tilt the respectively angle (θ 3) of regulation of opposite direction.In addition, shown in figure, the angle (θ 4) that relative the 4th imaginary plane with surperficial 115g of surperficial 115f tilts to stipulate mutually in opposite direction.In addition, with figure be BB ' the alignment pseudosection of Figure 36.
Above-mentioned θ 3 and θ 4 are satisfied the condition of 4＜90 ° of θ 3＜θ.That is,, make the surperficial 115g (surperficial 115f) of LED portion 103 sides more serious than the inclination of relative the 4th imaginary plane of other surperficial 115e (surperficial 115d) about surperficial 115g and 115e (or surperficial 115d and 115f).In other words, make the inclination mitigation of the surperficial 115g (surperficial 115f) of LED portion 3 sides than other surperficial 115e (surperficial 115d) apparent surface 115a.
As above, turning part 115 has the shape of relative the 4th imaginary plane symmetry.
Secondly, with reference to Figure 38 the light path of this light of making the luminous situation of LED portion 103 is described.In addition, because light guide plate 102 ' be the shape of above-mentioned relatively the 4th imaginary plane symmetry, so following light path to the light that is sent to light guide section 112 sides describes.
Shown in figure, some light that penetrates from LED portion 103 passes through to be reflected by surperficial 115g with the light path shown in the figure (131).And the light that is reflected by surperficial 115g incides light guide section 112 by the light path (132) with figure via surperficial 112c.In addition, other light that penetrates from LED portion 3 passes through with the light path shown in the figure (141), by surperficial 115g reflection, and by surperficial 115e reflection.Like this, light guide plate 102 ' is constructed as follows structure, and the light that will penetrate from LED portion 103 is by any reflection of the surface with different pitch angle (115g115e), and the photoconduction after will reflecting is to light guide section 112.
According to such structure, compare with the structure of light guide plate 52 shown in Figure 39, obtain the favourable effect of aftermentioned.The structure of light guide plate 152 at first, is described.In addition, Figure 39 is the sectional view of light guide plate 152.
Shown in figure, this light guide plate 152 has a plane 115d ' and replaces surperficial 115d and surperficial 115f, has a plane 115e ' and replaces surperficial 115e and surperficial 115g.In addition, shown in figure, the angle (θ 3) of the mutual inclined in opposite directions regulation of relative the 4th imaginary plane of surperficial 115d ' with surperficial 115f '.That is, surperficial 115d ' and surperficial 115f ' have surperficial 115d and the identical angle of 115e with light guide plate 152, and relative the 4th imaginary plane tilts.
In light guide plate 102 ', compare with the light guide plate 152 of object as a comparison, can be easily from the zone of the intersection of the close surperficial 112c of surperficial 112c and surperficial 112b to the light of light guide section 112 incidents from LED portion 103.This be because, the angle of inclination of relative the 4th imaginary plane of surperficial 115g is bigger than the surperficial 115e's ' of light guide plate 152.In addition, also identical in light guide section 111 sides.
Below, enumerate example, the situation that in fact obtains above-mentioned effect is described.
Figure 40 is identical with Figure 38, is BB ' the alignment pseudosection of Figure 37.Shown in figure, with the distance of surperficial 112b and surperficial 112a, and the distance of the light-emitting area of surperficial 115a and LED portion 103 be made as L7.In addition, with the intersection of surperficial 115f and surperficial 115g, be made as L8 with the distance of surperficial 115a.In addition, the distance with surperficial 115g and surperficial 115e is made as L9.The distance of the 4th imaginary plane and surperficial 112c is made as L11.And then the position of the surperficial 112b will arrive surperficial 112b from the light that surperficial 112c incides light guide section 112 time is made as the in-position.
At this, on light guide section 102 ', L7=5mm, L8=4mm, L9=3.4mm, L10=1mm, L11=3mm, θ 3=45 °, and θ 4=60 ° the time, Figure 41 represents the relation of the distance (Lx) of the angle of emergence (φ (with representing as φ the figure) that is equivalent to embodiment 3) of the light that penetrates from LED portion 103 and above-mentioned in-position and the 4th imaginary plane.In addition, the refractive index of light guide section 111112 is made as 1.5 situation with figure expression.
Shown in figure, on light guide plate 102 ', arriving Lx from the light of LED portion 103 is the position of the surperficial 112b of 3mm.That is, light arrives the end of the surperficial 112c side of surperficial 112b.On the other hand, on light guide plate 152, shown in figure, not arriving than Lx from the light of LED portion 103 is that the position of 12.5 surperficial 112b is more by the surperficial 112b of the 4th imaginary plane side.
Like this, can make light arrive light guide plate 102 ' than the position of light guide plate 152 near the surperficial 112b of the 4th imaginary plane.Therefore, light guide plate 102 ' can be shone uniform light to the liquid crystal panel side than light guide plate 152.
In Figure 41, be roughly the line part of the Lx more than 37 ° and be that the line of the Lx more than 40 ° the time partly is the light that sends about from LED portion 103 about the φ of light guide plate 152 about the ф of light guide plate 102 ', promptly pass through surperficial 115e115g reflection, and be directly incident on the light of light guide section 112.
As above, light guide plate 102 ' have with from from surperficial 115d115f towards the light of direction (the 5th direction) incident of surperficial 111c along surperficial 111a (light-emitting area) leaded light, simultaneously, it is injected to outside light guide section 112 from surperficial 111a, this light guide plate is following structure, having by carrying out primary event makes exterior light from the opposing face side incident of surperficial 111a to above-mentioned the 5th directional steering, incide the reflecting surface (surperficial 115d115f) of light guide section 111, this reflecting surface contains surface (the 3rd reflecting surface) 115d and surface (the 4th reflecting surface) 115f that apparent surface 111a tilts at least, the angle of inclination of 115f apparent surface 111a surface, surface 115a is set to such an extent that specific surface 115d is little, and the specific surface 115d opposing face side of abutment surface 111a surface 115a more.
According to this structure, identical with the light guide plate 102 of embodiment 3, light guide plate 102 ' can be used as the slimming that is applicable to back light device, and the light guide plate of the maximization of the light-emitting area of back light device use.
In addition, in light guide plate 102 ', the angle of inclination of surperficial 115f apparent surface 111a be set specific surface 115 little.And surperficial 115f specific surface 115d face is the opposing face side of abutment surface 111a more.
Therefore, only compared by the light guide plate 152 that the reflecting surface 115d ' with the identical angle of inclination of surperficial 115d constitutes with reflecting surface, the incoming position of the light of the plane of incidence in the time of the light that is turned to by above-mentioned reflecting surface can being incided light guide section 111 is set in apart from the light-emitting area of light guide section 111 position far away (near the intersection of surperficial 111c and surperficial 111b).Consequently, compare, can make light inject light guide section 111 backs in position reflection near surface (plane of incidence) 111c with light guide plate 152.
Therefore, on light guide plate 102 ', can be from more luminous near the position of surperficial 115f surface 115d surface 111c to the outside than light guide plate 152.Therefore, compare, can penetrate more uniform light with light guide plate 152.
In addition, light guide plate 102 ' has from guiding along surperficial 112a (light-emitting area) towards the light of direction (the 5th direction) incident of surperficial 112c from surperficial 115e115g, and inject to outside light guide section 112 from surperficial 112a, it is following structure, have by carrying out primary event, will be from the exterior light of the opposing face side incident of surperficial 112a to above-mentioned the 5th directional steering, incide the reflecting surface (surperficial 115e115g) of light guide section 112, this reflecting surface contains surface (the 3rd reflecting surface) 115e and surface (the 4th reflecting surface) 115g that apparent surface 112 tilts at least, the angle that 115g apparent surface 112a surface, surface 115a tilts is set to such an extent that specific surface 115e is little, and it is compared with surperficial 115e, more is positioned at the opposing face side of surperficial 112a surface 115a.At this moment, also obtain effect same as described above.
But, in the above-described embodiments, the structure that has two surfaces (for example surperficial 115g115e) that will reflect from the light of LED portion 103 turning part 115 with the side in the 4th imaginary plane is an example, but be not limited thereto, also can have the structure on the surface more than three for side's side in the 4th imaginary plane.
In addition, be that the shape of symmetry is illustrated with turning part 115, but be not limited thereto.
For the shade that prevents the light that turning part 115 produces produces, also can constitute surperficial 115d, surperficial 115e, surperficial 115f, reach at least one surface among the surperficial 115g by a small amount of material (for example whitewash) that sees through light.Or, when the reflecting material (for example aluminium) that these surperficial 115d～115g are complete shading,, for example preferably 115 regional transmission M2 is set at least in the turning part as embodiment 3, constitute the structure that has to the structure of the internal leakage light of turning part 115.
In addition, also the shape of light guide section 111 and light guide section 112 can be made as the shape of encirclement turning part 115 surperficial 115d～115g shown in Figure 42.In addition, in figure, for the convenience that illustrates, light guide section note that will be corresponding with light guide section 111 is made light guide section 111 ', and the light guide section note corresponding with light guide section 112 made light guide section 112 '.In addition, will each surface corresponding remember respectively and make surperficial 111a '～111f ' with surperficial 111a～surperficial 111f.
To be made as surperficial 111s and surperficial 111t with the surface of surperficial 111c ' and surperficial 115b115f adjacency.In addition, this surface 111s and surperficial 111t are the faces of mutual subtend under the state that clips turning part 115.
At this moment, also from the surperficial 111s of the light guide section 111 ' shown in the figure and surperficial 111t in light guide section 111 incident from the light of LED portion 103.
In the above-described embodiments, be example with light guide section 111 sides, the example of structure that explanation will be turned to by any one surface two surperficial 115d115f from the exterior light that LED portion sends.But, the invention is not restricted to have the structure on such two surfaces, the quantity on surface also can be for more than three.At this moment, light guide plate contains the first～the n reflecting surface (n is the natural number more than 3) of surface (being above-mentioned reflecting surface) the apparent surface 111a inclination that will turn to exterior light at least, the n reflecting surface also belongs to be set the angle of inclination of apparent surface 111a littler than the 3rd reflecting surface, and the structure of the opposing face side of ratio the 3rd reflecting surface abutment surface 111a.In addition, these items are also identical in light guide section 112 sides.
In addition, certain part in light guide plate does not guide under the situation of light of ormal weight, can realize the leaded light of above-mentioned light by the size of setting above-mentioned light guide plate yet.
With reference to Figure 43 a～Figure 51 b other embodiments of the invention are described.In addition,, use identical symbol, omit its explanation having with the parts of the parts identical functions shown in the drawings of the foregoing description 3 and embodiment 4 for the convenience that illustrates.
Figure 43 a is the light guide plate 102 of formation of the present invention back of the body irradiation " top figure.In addition, Figure 43 b is CC ' the alignment pseudosection of Figure 43 a.Shown in Figure 43 a, Figure 43 b, light guide plate 102 " have light guide section 121, light guide section 122, reach turning part 125.In addition, turning part 125 is clipped by light guide section 121 and light guide section 122.Below, for the convenience that illustrates, light guide section 121 and light guide section 122 also can have symmetrical shape, and have mutual identical functions.
In addition, surperficial 121a and surperficial 122a are equivalent to the light-emitting area that claim is put down in writing.
Shown in Figure 43 a and Figure 43 b, turning part 125 has surperficial 125a～125c.Surface 125a is the face of liquid crystal panel side.Form a plane (below be called the liquid crystal side plane) by the surperficial 122a of the surperficial 125a of the surperficial 121a of light guide section 121, turning part 125, light guide section 122.Surface (reflecting surface) 125b is the face of LED portion 103 sides, establishes the face with the surperficial 121c1～121c4 adjacency of light guide section 121.In addition, surface (reflecting surface) 125c is the face of LED portion 103 sides, is the face with the surperficial 122c1～122c4 adjacency of light guide section 122.In addition, surperficial 125b and surperficial 125c are of similar shape.Surface 125b and surperficial 125c are made of catoptrical material (for example aluminium).
At this, will be perpendicular to the face of surperficial 125a, when the face that contains intersection of promptly surperficial 125b and surperficial 125c is made as the 5th imaginary plane, the mutual inclined in opposite directions equal angular of relative the 5th imaginary plane of surperficial 125b with surperficial 125c.
In light guide plate 102 " on, the angle that the surface that apparent surface 121c1～121c4 and surperficial 122c1～122c4 are adjacent constitutes mutually is set greater than 90 °.
The light path of this light when secondly, explanation makes LED portion 103 luminous with reference to Figure 44.In addition, because light guide plate 102 " be the shape of above-mentioned relatively the 5th imaginary plane symmetry, below, the light path of the light of sending into light guide section 122 sides is described.
Shown in figure, some light that penetrates from LED portion 103 passes through with the light path shown in the figure (151), by surperficial 125c reflection.And,, incide on the light guide section 122 by light path (152) by the light of surperficial 125c reflection via surperficial 122c2 with figure.In addition, other light that penetrates from LED portion 3 passes through with the light path shown in the figure (161), by surperficial 125c reflection.And, by light path (162), inject light guide section 122 by the light of surperficial 125c reflection via surperficial 122c1 with figure.
Like this, light guide plate 102 " be formed in the light that will penetrate from LED portion 103 by same reflecting surface primary event after, incide the structure of light guide section 122 via different surfaces (surperficial 122c1 and surperficial 122c2).
According to such structure, compare with the situation of light guide plate 162 with the 165 replacement turning parts 125, turning part shown in Figure 45 a and Figure 45 b, obtain the favourable effect of aftermentioned.The structure of light guide plate 162 at first, is described.
Figure 45 a is the top figure of light guide plate 162.This light guide plate 162 has identical structure with light guide plate shown in Figure 42 except that the structure difference of turning part.Below, the turning part 165 as different structures is described.
Shown in Figure 45 a and Figure 45 b, turning part 165 has surperficial 165a～165c.Surface 165a is the face of liquid crystal panel side.Surface 165b is the face of LED portion 103 sides, is the face with surperficial 111c ' the 111s111t adjacency of light guide section 111 '.In addition, surperficial 113e is the face of LED portion 103 sides, is the face with surperficial 112c ' the 122s112t adjacency of light guide section 112 '.
In addition, surperficial 165b and surperficial 165c adjacency, the surperficial 111c ' of the relative light guide section 111 ' of its intersection and the surperficial 112c ' of light guide section 112 ' are parallel.In addition, surperficial 165b and surperficial 165c are of similar shape.At face that will be vertical with surperficial 165a, when promptly the face by above-mentioned intersection is made as the 6th imaginary plane, tilt the respectively round about angle of regulation of relative the 6th imaginary plane of surperficial 165b with surperficial 165c.
In addition, the angle of surperficial 111c ' and surperficial 111s111t formation is respectively 90 °.The angle that surface 112c ' and surperficial 112s112t constitute is respectively 90 °.
Below, enumerate the actual situation that obtains above-mentioned effect of example explanation.
Figure 46 a is a light guide plate 102 " top figure, be expression with the center of the surperficial 125a of turning part 125 be initial point, constitute surperficial 121c1～121c4, and the limit of surperficial 122c1～122c4, the figure of the coordinate on promptly vertical limit with surperficial 125a.In addition, Figure 46 b is EE ' the alignment pseudosection of Figure 46 a.
Shown in Figure 46 a, the coordinate of the intersection of surperficial 122c1 and surperficial 122c2 (limit) be (x, y)=(2,1,3).The coordinate of the intersection of surface 122c1 and surperficial 122c1 be (x, y)=(0,4).In addition, the coordinate of the intersection of surperficial 122c2 and surperficial 122c3 be (x, y)=(3,0).The coordinate of the intersection (limit) of surface 122c3 and surperficial 122c4 be (x, y)=(2.1 ,-3).In addition, the intersection coordinate of surperficial 122c4 and surperficial 122c4 be (x, y)=(0 ,-4).The unit of coordinate all is mm.
Shown in Figure 46 b, the distance of the intersection of surperficial 125a, surperficial 125b, surperficial 125c is 3.7mm.In addition, the distance of the light-emitting area of surperficial 125a and LED portion 103, and the distance of surperficial 125a and surperficial 122b all be 5mm.
Figure 47 a is the top figure of light guide plate 162, be expression with the center of the surperficial 165a of turning part 165 is initial point, constitutes the limit of surperficial 112s, surperficial 112t, surperficial 112c ', the figure of the coordinate on promptly vertical with surperficial 165a limit.In addition, Figure 47 b is FF ' the alignment pseudosection of Figure 47 a.
Shown in Figure 47 a, the coordinate of the intersection of surperficial 112s and surperficial 112c ' (limit) be (x, y)=(3,4).The coordinate of the intersection of surface 112s and surperficial 111s be (x, y)=(0,4).In addition, the coordinate of the intersection of surperficial 112t and surperficial 112c ' be (x, y)=(3 ,-4).The coordinate of the intersection of surface 112t and surperficial 111t be (x, y)=(0 ,-4).
Shown in Figure 47 b, the distance of the intersection of surperficial 165a, surperficial 165b, surperficial 165c is 3.7mm.In addition, the distance of the light-emitting area of surperficial 165a and LED portion 3, and the distance of surperficial 165a and surperficial 122b ' all be 5mm.
At this, will be to light guide plate 102 " plane of the light path that comprises some light that arrives surperficial 125c that penetrates from LED portion 103, and the plane vertical with surperficial 125a is made as the 7th imaginary plane.In addition, will comprise the plane of x axle, and the plane vertical with surperficial 125a is made as the 8th imaginary plane.The angle of the 7th imaginary plane and the 8th imaginary plane formation is made as β (variable).
In addition, by above-mentioned some light of surperficial 125c reflection when surperficial 122c1 and surperficial 111c2 inject light guide section 122, will comprise that the plane of light path of light of above-mentioned reflection and the plane vertical with surperficial 125a are made as the 7th imaginary plane.The angle of above-mentioned the 7th imaginary plane and the 8th imaginary plane formation is made as γ (variable).
In addition, also same as described above to light guide section 162, definition β and γ.
Figure 48 is the light guide plate 102 to having above size " and light guide plate 162 represent the chart of the relation of β and γ respectively.With figure expression the refractive index of light guide section 121122 is made as 1.5 situation.Shown in figure, because β probably surpasses 47 °, so with light guide plate 102 " the γ value be made as little than light guide plate 162.Therefore, light guide plate 102 " compare with light guide plate, can be with the light of more light quantity to x direction of principal axis leaded light.
In addition, by the suitable light guide plate 102 of setting " surperficial 121c1～121c4 and size and/or the configuration of surperficial 122c1～122c4, can set will be to light guide plate 102 " which of light guide section (121122) partly import the light of how many light quantities.
As above, light guide plate 102 " having will be from the light of direction (the 5th direction) incident of surperficial 121c1～121c4 along surface (light-emitting area) 121a guiding from surperficial 125b; and inject to outside light guide section 121; it is following structure; have by carrying out primary event; will be from the exterior light of the opposing face side incident of surperficial 121a to above-mentioned the 5th directional steering; inject surface (reflecting surface) 125b of light guide section 121 from surperficial 121a, light guide section 121 has the exterior light that will be turned to by surperficial 125b to the surface of light guide section 121 incidents (a plurality of continuous plane of incidence) 121c1～121c4, and the angle that two surfaces that adjoin each other in surperficial 121c1～121c4 constitute mutually is greater than 90 °.
According to this structure, identical with the light guide plate 102 ' of the light guide plate 102 of embodiment 3 and embodiment 4, can be with light guide plate 102 " as the slimming that is applicable to back light device, and the light guide plate of the maximization of the light-emitting area of back light device use.
In addition, light guide section 121 has the incidence of external light that will be turned to by the surperficial 125b surperficial 121c1～121c4 to light guide section 121.Therefore, the light that is turned to by surperficial 125b can be incided in the light guide section 121 via any one surface in surperficial 121c1～121c4.In this light guide plate 102 " on, the angle initialization that two surfaces that adjoin each other among surperficial 121c1～121c4 are constituted mutually is greater than 90 °.Therefore, be that the light guide plate of 90 ° structure is compared with angle that adjacent two surfaces constitute mutually, position that can the surperficial 121c1～121c4 of outer light guide in distance light guide section 121 of more light quantities is farther the position of surperficial 121d side (more to).
Therefore, needn't penetrate under the situation of certain light quantity from surperficial 121a, with angle that adjacent two surfaces (plane of incidence) constitute mutually is that the light guide plate of 90 ° structure is compared, and also can realize can be with the such effect of length lengthening along the light guide section 121 of above-mentioned the 5th direction.
In the above-described embodiments, be example with the light that will turn to by surperficial 125b by the structure of any surperficial incident of four surperficial 122c1～122c4.But, the invention is not restricted to have the structure on this four surfaces, be more than two if having the quantity on the surface of this function, then be not particularly limited.Also identical in light guide section 122 sides.
In addition, also can be with light guide plate 102 " structure be made as structure shown in Figure 49.Light guide plate shown in Figure 49 is represented to constitute light guide plate 102 respectively by four planes (reflecting surface) " surperficial 125b and the situation of surperficial 125c.In addition, each plane have with certain a bit be the summit have mutually triangular shaped.In addition, the invention is not restricted to four such planes, also can constitute surperficial 125b and surperficial 125c by plural plane respectively.In with figure, the turning part that will have these planes is expressed as turning part 125 '.
In addition, also can be with light guide plate 102 " structure be made as structure shown in Figure 50.Light guide plate shown in Figure 50 has the curved surface (being the curved surface of ring-type in the example of figure) that works as the plane of incidence after turning to, and replaces surperficial 121c1～c4 and surperficial 122c1～c4.In addition, represent to constitute light guide plate 102 respectively by two planes (reflecting surface) respectively with the light guide plate shown in the figure " surperficial 125b and the situation of surperficial 125c.In addition, each plane has and has only certain any fan-shaped shape as the summit.In addition, the invention is not restricted to two such planes, also can constitute surperficial 125b and surperficial 125c respectively by plural plane.In with figure, the turning part that will have these planes is expressed as turning part 126.
As above, Figure 49 and light guide plate shown in Figure 50 have the light from the 5th direction incident are guided along light-emitting area (for example surperficial 121a the situation of Figure 49), and inject to outside light guide section from light-emitting area, it is following structure, have by carrying out primary event, will be from the exterior light of the opposing face side incident of light-emitting area to above-mentioned the 5th directional steering, incide the reflecting surface of above-mentioned light guide section, this reflecting surface is made of continuous a plurality of planes, the respectively relative light-emitting area of the intersection of adjacent planar tilts in a plurality of planes, the normal on each plane towards mutual difference.
In such structure, also with the light guide plate 102 ' of the light guide plate 102 of embodiment 3, embodiment 4, and light guide plate 102 " identical, can be with above-mentioned light guide plate as the slimming that is applicable to back light device, and the light guide plate use of the maximization of the light-emitting area of back light device.
In addition, above-mentioned reflecting surface is made of continuous a plurality of planes.In addition, the respectively relative light-emitting area of the intersection on the plane that adjoins each other in a plurality of planes tilts.Therefore, can after exterior light being turned to, it be incided in the light guide section by arbitrary plane.In addition, the normal on each plane towards mutual difference.Therefore, compare, in the light guide plate of Figure 49 and Figure 50, the light after being turned to by above-mentioned reflecting surface can be incided light guide section as more uniform radial light with the light guide plate towards identical mutually structure of the normal on each plane.
In addition, also can be with light guide section 102 " form the structure shown in Figure 51 a and Figure 51 b.Figure 51 b is GG ' the alignment pseudosection of Figure 51 a.Light guide plate shown in this Figure 51 a, 51b is compared with light guide plate shown in Figure 50, the shape difference of turning part.That is, the light guide plate shown in Figure 51 a and Figure 51 b has the shape in the zone of the curved face part that surface (reflecting surface) that the light with LED portion turns to contains circular cone at least.According to such structure, also can obtain and Figure 49 and the identical effect of light guide plate shown in Figure 50.
Below Figure 52～Figure 65, other embodiments of the invention are described.
Figure 52 is the stereographic map of the schematic configuration of expression back of the body irradiation of the present invention.Shown in figure, back of the body irradiation (lighting device) 201 has light guide plate 202 and LED portion (light-emitting component) 203.
At this, light guide plate 202 can be by for example processing a transparency carrier, and the substrate after the processing is carried out surface treatment and forms one.Below, for the convenience that illustrates, light guide plate 202 is distinguished into a plurality of parts, the structure of light guide plate 202 is described.
Shown in figure, light guide plate 202 has light guide section (the 9th light guide section) 211, light guide section (the tenth light guide section) 212, light guide section 213, light guide section 214, light guide section (other light guide section the 7th light guide section) 215, light guide section (other light guide section the 8th light guide section) 216, reaches turning part 217.
At this, turning part 217 is clipped by light guide section 213 and light guide section 214.In addition, turning part 217 is clipped by light guide section 215 and light guide section 216.
In the following description, light guide section 211 and light guide section 212 have relative turning part 217, light guide section 215, and the symmetrical shape of light guide section 216.In addition, light guide section 213 and light guide section 214 have the symmetrical shape in relative turning part 217.Light guide section 215 and light guide section 216 have the symmetrical shape in relative turning part 217.
In addition, light guide section 211 and light guide section 212 are made of identical material.Light guide section 213 and light guide section 214 are made of identical material.Light guide section 215 and light guide section 216 are made of identical material.
Therefore, below mainly to turning part 217, light guide section 211, light guide section 213, and light guide section 215 describe.In addition, light guide section 212, light guide section 214, and light guide section 216 simple, omit its explanation.
Figure 53 is the top figure of light guide plate 202.Figure 54 is the following figure of light guide plate 202.At this, for the convenience that illustrates, above the face of the light guide plate 202 of LED portion 203 sides is called, below the face of the light guide plate 202 of liquid crystal side is called.
Shown in Figure 52, light guide section 211 has the shape of rectangular parallelepiped.In addition, shown in Figure 52～Figure 54, light guide section 211 has surperficial 211a～211g.At this, surface (face of regulation) 211a is the face of liquid crystal panel side, and surperficial 211b is the face of LED portion 3 sides.In addition, surperficial 211c is the face with light guide section 215 subtends, and surperficial 211d is the face with light guide section 216 subtends.In addition, surperficial 211c211d and light guide section 213 join.211e surface, surface is the face of the opposition side of 211c211d.Surface 211f211g is the face that is left, with the face of light guide section 215 sides as surperficial 211f, with the face of light guide section 216 sides as surperficial 211g.
Shown in Figure 52～Figure 54, light guide section 212 has surperficial 212a～212g in the position identical with light guide section 211.That is, each surface (212a～212g) respectively with each surface (211a～211g) corresponding of light guide section 211.In addition, surperficial 212a is identical with surperficial 211a, is equivalent to the face of the regulation that claim puts down in writing.
In addition, but the inside of light guide section 211 and light guide section 212 is by the material of leaded light at least, and for example transparent propylene material and glass material constitute.The pattern that the surperficial 211b of light guide section 211 and the surperficial 212b of light guide section 212 have the regulation that is used for scattered light.Enumerate the pattern shown in Figure 77 as this pattern.
Above-mentioned pattern is not limited to above-mentioned pattern, also can be known various patterns.Above-mentioned pattern also can be big more apart from the figure of surperficial 211c211d and surperficial 212c212d formation pattern far away more.Below, above-mentioned figure is called light scattering portion.In addition, the zone of removing light scattering portion among the surperficial 211b212b is called non-scattering region.
Shown in Figure 52, light guide section 213 has the shape of rectangular parallelepiped.In addition, shown in Figure 52～54, light guide section 213 has surperficial 213a～213d.At this, surperficial 213a is the face of liquid crystal panel side, and surperficial 213b is the face of LED portion 3 sides.In addition, surperficial 213c is the face that joins with surperficial 211c and light guide section 215, and surperficial 213d is the face that joins with surperficial 211d and light guide section 216.
Shown in Figure 52～54, light guide section 214 has surperficial 214a～214d in the position identical with light guide section 213.That is, each surface (214a～214d) respectively with each surface (213a～213d) corresponding of light guide section 213.
At this, light guide section 213 and light guide section 214 are identical with light guide section 212 with light guide section 211, but by the material of leaded light, for example transparent propylene material and glass material constitute.
Shown in Figure 55, turning part 217 has surperficial 217a～217c.Surface 217a is the face of liquid crystal panel side.In addition, surface (turning part first reflecting surface) 217b is the face of LED portion 203 sides, and is the face that joins with light guide section 215.In addition, surface (turning part second reflecting surface) 217c is the face of LED portion 203 sides, and is the face that joins with light guide section 216.
In addition, the surperficial 217b of turning part 217 and surperficial 217c are made of catoptrical material (for example aluminium).In addition, for the shade that prevents the light that turning part 217 produces produces, also can constitute surperficial 217b and surperficial 217c by a small amount of material (for example whitewash) that sees through light, or during its reflecting material (for example aluminium), be preferably the structure that has from the turning part a part of leak light of 217 by complete shading.
Figure 57 is the stereographic map of expression light guide section 215.Figure 58 is BB ' the alignment pseudosection of Figure 53.Shown in Figure 57, light guide section 215 has the 3rd parts 215, the 4th parts 252, reaches the 5th parts 253.
Shown in Figure 57 and Figure 58, the 3rd parts 251 have tabular shape (in more detail, the part has the plate-like shape of protuberance).In addition, the 3rd parts 251 have surperficial 251a and surperficial 251b.Surface 251a is the face of liquid crystal panel side.Surface 251b is the face of LED portion 203 sides.
The 4th parts 252 and the 5th parts 253 are disposed on the 3rd parts 251.In more detail, two parts 252253 are formed on the plane that comprises surperficial 252b.In addition, the 4th parts 252 and the 5th parts 253 have relatively and the vertical face of above-mentioned the 9th imaginary plane, i.e. the symmetrical shape of face by surperficial 217b center (below be called the tenth imaginary plane).
Shown in Figure 58, the 4th parts 252 have the surperficial 252a～252c parallel with surperficial 251a in LED portion 203 sides.In addition, the 4th parts 252 have slot part 252t1 and slot part 252t2 in LED portion 203 sides by distance turning part 217 near orders.
Slot part 252t1 and slot part 252t2 are parallel to each other, and form linearity.In addition, the angle of relative above-mentioned the 9th imaginary plane inclination regulation of slot part 252t1 with slot part 252t2.The angle of this inclination is set to the angle that can fully carry out total reflection to the light that guides in the 4th parts 252 by surperficial 252e described later and surperficial 252h.
In addition, vertical with the bearing of trend of each slot part respectively section of slot part 252t1 and slot part 252t2 constitutes the shape of コ word shape.About the degree of depth of groove, make the degree of depth of depth ratio slot part 252t1 of slot part 252t2 dark.About the length (length of bearing of trend) of groove, identical in slot part 252t1 and slot part 252t2.
By forming slot part 252t1, on the 4th parts 252, be formed on the wall of LED portion 203 sides and slot part 252t1, i.e. the parallel surperficial 252d of wall 251a.In addition, because the existence of slot part 252t1, thereby on the 4th parts 252,, be formed with the wall with slot part 252t1, surface (reflecting surface) 252e and surperficial 252f that promptly surperficial 251a is vertical by 217 near orders apart from the turning part.
By forming slot part 252t2, on the 4th parts 252, be formed on the wall of LED portion 203 sides and slot part 252t2, i.e. the parallel surperficial 252g of wall 251a.In addition, because the existence of slot part 252t2, thereby on the 4th parts 252,, be formed with the wall with slot part 252t2, surface (reflecting surface) 252h and surperficial 252i that promptly surperficial 251a is vertical by 217 near orders apart from the turning part.
In addition, be positioned at surface (reflecting surface) 252j of conduct the 4th parts 252 end faces of opposition side of turning part 217 and surperficial 252e, surperficial 252f, surperficial 252h, and surperficial 252i form abreast.The length that this surface 252j has rectangular-shaped, vertical with surperficial 251b limit is set as the value bigger than the degree of depth of slot part 252t2.In addition, the length with the length on the parallel limit of the surperficial 251b of surperficial 252j and slot part 252t1 and slot part 252t2 is identical.
As above, surperficial at least 252e, surperficial 252h, and surperficial 252j be the face that is parallel to each other, the length on the limit vertical with surperficial 211a is 217 far away more apart from the turning part, its length is set more longways.The length with the parallel limit of surperficial 211a of each face (252e252h252j) is identical.Consequently, the area of each face (252e252h252j) is 217 far away more big more apart from the turning part.
In addition, the 4th parts 252 have surperficial 252k, and this surface is and the parallel surface of above-mentioned the 9th imaginary plane, with the surperficial 217b adjacency of turning part 217.In addition, the 4th parts have with the surperficial 252m of the 5th parts subtend and with the surperficial 252n of light guide section 211 subtends.
Shown in Figure 57, the 5th parts 253 also have surperficial 253a～253k, 253m, and 253n in the position identical with the 4th parts 252.That is, each face (252a～252k, 252m, 252n) with the 4th parts 252 is corresponding respectively for each face (253a～253k, 253m, 253n).In addition, surperficial 253e253h253j is equivalent to the reflecting surface that claim is put down in writing.
In addition, each parts 251～253 of light guide section 215 can be made of the inside identical materials with light guide section 211 and light guide section 212.
In addition, form a section (below be called the liquid crystal side plane) by surperficial 211a, surperficial 212a, surperficial 213a, surperficial 214a, surperficial 251a, surperficial 261a, surperficial 271a.In addition, above-mentioned liquid crystal side plane has rectangular shape.
Secondly, with reference to the light path of this light of Figure 60～Figure 63 b when making LED portion 203 luminous.In addition, because light guide section 202 be the shape of above-mentioned relatively the 9th imaginary plane symmetry, so following light path to the light of sending into light guide section 215 sides describes.In addition, because light guide section 215 is the shape of above-mentioned relatively the tenth imaginary plane symmetry, so the light path that relative the tenth imaginary plane in the light of sending into light guide section 215 sides is sent into the light of the 4th parts 252 sides describes.But, below shown in light path be an example, but be not limited thereto.
Shown in Figure 60, the light that above-mentioned relatively the 9th imaginary plane is set as from LED portion 3 with the angle (φ) of regulation is by the surperficial 217b reflection of turning part 217.And the light of this reflection is injected the 4th parts 252 of light guide section 215 via surperficial 252k.At this moment, light is reflected by surperficial 252k.In addition, the light that penetrates from LED portion 203, also can't help surperficial 217b reflection, and directly incide on the 4th parts 252 of light guide section 215 from surperficial 252k.
The figure of the relation at the angle that the light path (P1 among Figure 60) that Figure 61 represents above-mentioned φ angle and incides the light of surperficial 252k253k after the going up light of surperficial 252k253k refraction (promptly by) and above-mentioned liquid crystal side plane constitute (below be called the 5th angle (α)).In figure, the value of above-mentioned θ is made as 45 °.At this, in light guide section 215, be that when above-mentioned the 5th angle approximately surpassed 48 °, then at the surperficial 251a and the surperficial 251a (interface) of light guide section 215, light can not carry out total reflection under 1.5 the propylene material situation about constituting by refractive index.But, in said structure, shown in Figure 61, even φ is maximal value (being approximately 38 ° at this), also can total reflection take place at the surperficial 251a252a of light guide section 215.As mentioned above, above-mentioned α value changes according to the value of above-mentioned φ.
At this, as mentioned above, the light that incides on the 4th parts 252 is described.
The light (below be called the 4th light) of injecting the 4th parts 252 is by the light path (201) shown in Figure 62 (a) and (b), total reflection on surperficial 251a.In addition, by the 251a total reflection of this surface light by with the light path (202) of figure by surperficial 252a total reflection.And then, by surperficial 252a total reflection light by with the light path (203) of figure, total reflection on surperficial 252e.In addition, by the 252e total reflection of this surface light arrive surperficial 252n by light path (204) with figure.The light that arrives this surface 252n is by the light path (205) with figure, incides light guide section 211 via the surperficial 211c of light guide section 211.
In said structure, enumerated before total reflection on the surperficial 252e, the example of the light of total reflection on surperficial 251a and surperficial 252a, but be not limited to above-mentioned the 4th light by the light of surperficial 252e total reflection.For example, if the light that is reflected by surperficial 251a or surperficial 252a is also arranged, then on surperficial 251a and surperficial 252a, all do not have reflection, and directly arrive on the surperficial 252e.In addition, total reflection on surperficial 252n is arranged also, arrive the light of surperficial 252e.
In addition, inject the light path (211) of some other light (below be called the 5th light) of the 4th parts 252, total reflection on surperficial 251a by Figure 63 (a), Figure 63 (b).In addition, by the 251a total reflection of this surface light by with the light path (212) of figure, total reflection on surperficial 252b.That is, by surperficial 251a total reflection not total reflection on surperficial 52e of light, and enter in the 4th parts 252.And then, by surperficial 252b total reflection light by with the light path (213) of figure, in surperficial 252h total reflection.In addition, by the 252h total reflection of this surface light arrive surperficial 252n by light path (214) with figure.The light that arrives this surface 252n is by the light path (215) with figure, incides light guide section 211 via the surperficial 211c of light guide section 211.
Light by surperficial 252h total reflection is not limited to above-mentioned the 5th light.
In addition, incide other light (the 6th light) again on the 4th parts 252 by the light path (221) shown in Figure 64 a, Figure 64 b, total reflection on surperficial 251a.In addition, by the 251a total reflection of this surface light by with the light path (222) of figure, total reflection on surperficial 252b.That is,, and enter in the 4th parts 252 by the light no show surface 252e of surperficial 251a total reflection.
In addition, by the light of surperficial 252b total reflection by light path (223), by surperficial 251a total reflection with figure.In addition, by the light of this surface 251a total reflection by light path (224), by surperficial 252c total reflection with figure.That is, do not arrive surperficial 252h by the light of surperficial 252b total reflection, and enter in the 4th parts 252.
By surperficial 252c total reflection light by with the light path (225) of figure, by surperficial 252j total reflection.By surperficial 252j total reflection light by with the light path (226) of figure, arrive surperficial 252n.The light that arrives this surface 252n is by the light path (227) with figure, injects light guide section 211 via the surperficial 211c of light guide section 211.
Light by surperficial 252j total reflection is not limited to above-mentioned the 6th light.
In the above description, for the convenience that illustrates, the working direction of dividing three situations that light has been described, but actual glazing incides on the 4th parts 252 with various incident angles via whole of surperficial 252k.Therefore, at whole of surperficial 252e, whole of surperficial 252h, whole of surperficial 252j total reflection takes place.
In addition, even also arrive surperficial 252e, also not in the 252e total reflection of this surface, and the light that penetrates from the 4th parts 252.This also with the light that arrives surperficial 252h, and to arrive the light of surperficial 252j identical.
Secondly, with reference to Figure 65 explanation via the surperficial 211c of light guide section 211 light path from the light (regulation light) of the surperficial 252n incident light guide section 211 of the 4th parts 52.Figure 65 is that the CC ' of Figure 53 is to pseudosection.
Shown in figure, incide of non-scattering region (the be interface) total reflection of the light of light guide section 211 at surperficial 211a and surperficial 211b, enter in the light guide section 211.And then, in the light of above-mentioned incident, to the light of the scattering part of surperficial 211b irradiation by this scattering part scattering.And in the light of this scattering, the light in total reflections such as surperficial 211a does not penetrate from surperficial 211a.Thus, can be to the liquid crystal panel irradiates light.
In addition, in some exterior light that surperficial 217b by turning part 217 has reflected, do not have yet, and incide the light of light guide section 213 by in the light guide section 215.Like this, the light that incides light guide section 213 is directly incident on light guide section 211.Then, this light is penetrated to the liquid crystal panel side by light guide section 211.
But, for to a large amount of light quantity of light guide section 215 incidents, preferably with surperficial 252e, surperficial 252h, and surperficial 252j be made as scattering or catoptrical structure.For example, also can constitute above-mentioned each face by the coating (film) of white.
In addition, for sending into a large amount of light quantities, preferably constitute the film 252a252b252c of light guide section 215 by efficient catoptrical material (for example film of whitewash) to the liquid crystal panel side.
At this, when being called the 6th direction towards the direction of surperficial 211c from surperficial 252n, will be when the direction of 252k be called the 7th direction from 217b, then light guide plate 202 have with from the regulation light of the 6th direction incident along surface (face of regulation) 211a guiding, and from the outside light guide section 211 of surperficial 211a ejaculation, it is following structure, promptly has: turning part 217, it is by carrying out primary event, will be from the exterior light of the opposing face side incident of the surperficial 211a directional steering to light guide plate 202; Light guide section (other light guide section) 215, it will turn to the exterior light total reflection of the 7th direction, guide in inside, and (252e252h252j) it is reflected to the 6th direction by a plurality of surfaces (reflecting surface), incide light guide section 211,217 reflectings surface far away apart from the turning part, the area of reflecting surface is set greatly more.
According to this structure, can be by turning part 217 by carrying out primary event, will be from the exterior light of the opposing face side incident of surperficial 211a to the 7th directional steering.In addition, can utilize light guide section 215 will to reflect to the 6th direction to the exterior light of the 7th directional steering, inject light guide section 211 by a plurality of reflectings surface.In addition, the light that can will incide light guide section to the 6th direction reflection by light guide section 211 injects to the outside from the face of regulation.
Therefore, but since primary event and with photoconduction to light guide section 215, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
In addition, owing to can make 211 guiding of afore mentioned rules light,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type along the surface at light guide section 211.In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily increase light-emitting area.
Therefore, light guide plate 202 constitutes the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
In addition, utilize light guide section 215 by a plurality of reflectings surface with the direction of exterior light to light guide section 211, and above-mentioned the 6th direction reflection.Therefore, even under the situation of using pointolite as the light source that sends exterior light, also the light of wire can be incided light guide section 211 as afore mentioned rules light.In addition, can penetrate as the face of planar light by the light of light guide section 211 this wire from afore mentioned rules.
Therefore, pointolite can be used as the light source that sends exterior light.
But, owing to cause above-mentioned reflection of light at each reflecting surface (surperficial 252e252h252j) of light guide section 215, thus in the light quantity of the light (exterior light) of light guide section 215 inner total reflections and leaded light along with reducing away from turning part 217.Therefore, under the identical situation of the area of each reflecting surface, 271 reflectings surface far away apart from the turning part, the light quantity of the light of reflection (reflection light quantity) is few more.
But, in light guide plate 202 of the present invention, 217 reflectings surface far away apart from the turning part, the area of reflecting surface is set greatly more.Therefore, the situation identical with the area of each reflecting surface compared, and can reduce the reduction of above-mentioned volume reflection.
Therefore, the situation identical with the area of each reflecting surface compared, and the light (regulation light) of uniform light quantity can be incided above-mentioned light guide section.Therefore, in light guide plate 202, the situation identical with the area of each reflecting surface compared, also can be from the light that penetrates uniform light quantity towards the outside of afore mentioned rules.
On the other hand, when being called the 6th direction towards the direction of surperficial 212c from surperficial 253n, will be when the direction of surperficial 253k be called the 7th direction from surperficial 217b, then light guide plate 202 have with from the regulation light of the 6th direction incident along surface (face of regulation) 212a guiding, and inject to outside light guide section 212 from surperficial 212a, it also is following structure, have, turning part 217, it is by carrying out primary event, will be from the exterior light of the opposing face side incident of surperficial 212a to the 7th directional steering; Light guide section (other light guide section) 215, it will turn to the exterior light total reflection of the 7th direction, in guided inside, and (253e253h253j) it be reflected to the 6th direction by a plurality of surfaces (reflecting surface), incident light guide section 212,217 reflectings surface far away apart from the turning part.The area of reflecting surface is set greatly more.At this moment, also obtain effect same as described above.
As above, light guide plate 202 is the structure of the configuration that will be parallel to each other at the reflecting surface of above-mentioned the 7th direction adjacency.According to this structure, owing to will dispose in parallel to each other by the reflecting surface of above-mentioned the 7th direction adjacency, thus compare with the situation that does not dispose reflecting surface in parallel to each other, can be to above-mentioned light guide section incident light equably.Therefore, compare with the situation that does not dispose reflecting surface in parallel to each other, can be from the light that penetrates uniform light quantity towards the outside of afore mentioned rules.
As above, light guide plate 202 is following structure, and each reflecting surface apparent surface 211a (surperficial 212a) forms vertical.According to this structure, because each reflecting surface apparent surface 211a (surperficial 212a) becomes vertical, do not compare so do not form vertical situation with reflecting surface apparent surface 211a (surperficial 212a), can be effectively to above-mentioned light guide section incident light.Therefore, do not form vertical situation with reflecting surface apparent surface 211a (212a) and compare, can penetrate a large amount of light to the outside from surperficial 211a (212a).
As above, light guide plate 202 is following structure, above-mentioned each reflecting surface has rectangular-shaped, have the limit parallel with surperficial 211a (surperficial 212a) with the vertical limit of surperficial 211a (surperficial 212a), the length on above-mentioned parallel limit is identical at each reflecting surface, the reflecting surface of 217 positions far away apart from the turning part, the length on above-mentioned vertical limit is set longly more.
According to this structure, identical with the length on the parallel limit of surperficial 211a (surperficial 212a) at each reflecting surface, and the length on the limit vertical with surperficial 211a (surperficial 212a) reflecting surface of 217 positions far away apart from the turning part, what be set is long more.Therefore, the reflecting surface of 217 positions far away apart from the turning part, the area of reflecting surface is set greatly more.
As above, light guide plate 202 is following structure, light guide section 215 has a plurality of slot parts (252t1252t2) at the opposing face of surperficial 211a (surperficial 212a), the length of the bearing of trend of the mutual groove of each slot part (252t1252t2) is identical, 217 slot parts far away apart from the turning part, the degree of depth of slot part is set deeply more, relevant each slot part, and the wall (surperficial 252e252h) of turning part 217 sides of slot part constitutes above-mentioned reflecting surface.
According to this structure, each slot part (252t1252t2) the mutually length of the bearing of trend of groove is identical, and the slot part far away apart from the turning part, the degree of depth of slot part is set deeply more, therefore, the slot part of 217 distances far away apart from the turning part, the area of the wall of turning part 217 sides is set greatly more.In addition, the wall of turning part 217 sides constitutes above-mentioned reflecting surface.
Therefore, the reflecting surface of 217 positions far away apart from the turning part, the area of reflecting surface is set greatly more.
As above, light guide plate 202 is following structure, it has light guide section (the 7th light guide section) 215 and light guide section (the 8th light guide section) 216, light guide section 215 and light guide section 216 clip turning part 217 configurations, turning part 217 with said external light to the 7th direction, and, and turn to as the direction of the direction of light guide section 216 (below be called the 8th light guide section direction) as direction of the direction of light guide section 215 (below be called the 7th light guide section direction) and the 7th direction.
According to this structure, can will be from the exterior light of the opposing face side incident of surperficial 211a (surperficial 212a) by carrying out primary event to above-mentioned the 7th light guide section direction and the 8th light guide section directional steering by turning part 217.Therefore, can penetrate light from each surface (211a212a) of light guide section 211 and light guide section 212 via two light guide sections that are positioned at 217 both sides, turning part (light guide section 215 and light guide section 216).
As above, light guide plate 202 is following structure, it has light guide section (the 9th light guide section) 211 and light guide section (the tenth light guide section) 212, light guide section 211 and light guide section 212 clip turning part 217, light guide section 215, reach light guide section 216 configurations, the light that 216 two light guide sections of light guide section 215 and light guide section also will guide in the inside of each light guide section is to above-mentioned the 6th direction, and, promptly turn to as the direction of the direction of light guide section 212 (below be called the tenth light guide section direction) as direction of the direction of light guide section 211 (below be called the 9th light guide section direction) and above-mentioned the 6th direction.
According to this structure, can will be at light of this light guide section 215 inner guiding to the 9th light guide section direction and the tenth light guide section directional steering by light guide section 215.Equally, can will be at the light of the inside of this light guide section 216 guiding to above-mentioned the 9th light guide section direction and above-mentioned the tenth light guide section directional steering by light guide section 216.
Therefore, can via two light guide sections (light guide section 215 and light guide section 216) from be positioned at turning part 217, light guide section 215, and the surface (211a212a) of two light guide sections (light guide section 211 and light guide section 212) of light guide section 216 both sides penetrate light.
As above, light guide plate 202 is following structure, turning part 217 has surface (the turning part first reflecting surface) 217b and surface (the turning part second reflecting surface) 217c of reflection said external light, the surface 217b with said external light to above-mentioned the 7th light guide section directional steering, and surperficial 217c with said external light to the 8th light guide section directional steering.
According to this structure, can be by surperficial 217b with exterior light to the 7th light guide section directional steering.In addition, can be by surperficial 217c with exterior light to the light guide section directional steering from all directions.Therefore, can constitute turning part 217 with simple structure.
As above, light guide plate 202 is following structure, and surperficial 217b and surperficial 217c are identical shaped, and adjacent, and forms trequetrous two sides, and surperficial 217b is relative with surperficial 217c, and the 9th imaginary plane (determining face) is an equal angular, tilts to different directions mutually.
According to this structure, can shine exterior light to the direction of surperficial 211a surface 212a by a certain position from above-mentioned the 9th imaginary plane, make the light quantity of the light that reflects by surperficial 217b and surperficial 217c identical.Therefore, can be to the light of light guide section 215 with the identical light quantity of light guide section 216 incidents.
But, as mentioned above, the light that penetrates from LED portion 203, also have and can't help surperficial 217b reflection, and directly incide the light of the 4th parts 252 of light guide section 215 from surperficial 252k.At this moment, light guide section 215 will be can't help turning part 217 and be turned to, and the light of directly injecting this light guide section 215 carries out total reflection, in the inside guiding, simultaneously, is reflected to above-mentioned the 6th direction by above-mentioned each reflecting surface (252e252h252j), injects light guide section 211.
Therefore, can be to the exterior light that do not turn to by turning part 217 in light guide section 215 guiding, simultaneously, the light of this guiding is reflected to above-mentioned the 6th direction, incide on the light guide section 11.Therefore, the light quantity of the light that penetrates from above-mentioned surperficial 211a is not subjected to influence from the radioactive nature of the exterior light of the opposing face side incident of surperficial 211a.Therefore, can be from the light of a large amount of light quantity of surperficial 211a incident.
On light guide plate 202, between the 4th parts 252 of light guide section 211 and light guide section 215, there is the gap.That is, on the 4th parts 252, be provided with surperficial 252n.Can will inject a part of total reflection of the light of light guide section 215 by this surface 252n, to surperficial 252j direction guiding.In addition, concerning surperficial 253n, also be identical.
In addition, between the 4th parts 252 and the 5th parts 253, there is the gap.That is, on the 4th parts 252, be provided with surperficial 252m.Can will inject a part of total reflection of the light of light guide section 215 by this surface 252m, it will be guided to surperficial 252j direction.In addition, concerning surperficial 253m, also be identical.
Be to increase the light quantity that penetrates from surperficial 211a and surperficial 212a, preferably with surperficial 211e, surperficial 211f, surperficial 211g, surperficial 212e, surperficial 212f, and surperficial 212g be made as the structure that makes light scattering and reflection.For example, also can constitute above-mentioned each face by the coating (film) of white.
In addition, if with film 211b and film 212b subtend and the structure of mounting reflector plate, then can further increase the light quantity that penetrates from surperficial 211a and surperficial 212a.
But in above-mentioned light guide section 202, surperficial 252k253k is the vertical structure in above-mentioned relatively liquid crystal side plane.But be not limited thereto, for example shown in Figure 66, also can make above-mentioned relatively the 9th imaginary plane of surperficial 252k253k to turning to the light of (reflection) to tilt by surperficial 217b to the direction of above-mentioned liquid crystal side in-plane refraction.Specifically, the dihedral that also surperficial 252k253k and surperficial 217b can be constituted become the value than θ.
At this, Figure 67 represents the value of described θ is made as 45 °, and above-mentioned φ the when value of above-mentioned δ is changed and the relation of above-mentioned α.
Shown in figure, when increasing the value of above-mentioned δ, the value of above-mentioned α also increases.That is, when increasing the value of δ, the incident angle to above-mentioned surperficial 251a incident is reduced.In addition, shown in figure, even be 45 ° in the value with above-mentioned δ, above-mentioned φ obtains under the peaked situation, and the value that also must make α is more than 48 °.That is can total reflection take place on the surface of light guide section 215.
In addition, increase the value of above-mentioned δ, can reduce number of times to light guide section 215 inner total reflections.Therefore, near among the surperficial 252e253e of turning part 217, can be reflected into the exterior light that is mapped to light guide section 215 reliably.Therefore, can send into the light of uniform light quantity to the surperficial 211c of light guide section 211.
As above, light guide plate 202 is following structure, and with the surperficial 252k253k incident of above-mentioned exterior light from light guide section 215, surperficial 252k253k is the face vertical with surperficial 251a relatively, the direction inclination that reflects to surperficial 251a direction along the exterior light that will above-mentionedly turn to.
In addition, in above-mentioned light guide plate 202, light guide section 211 and light guide section 212 are rectangular shape, but are not limited thereto.For example shown in Figure 68, also dip plane 211h and dip plane 212h can be set on light guide section 211 and light guide section 212, this dip plane is adjacent with surperficial 211b and 211e and surperficial 212b and 212e respectively, the face that constitutes by the scattering material of catoptrical reflecting material or scattered light, and above-mentioned relatively liquid crystal side plane is oblique to surperficial 211c211d side and surperficial 212c212d inclination respectively.
Promptly, dip plane 211h is set, make dip plane 211h and intersection surperficial 211b than this dip plane 211h with intersection surperficial 211e near surperficial 211c211d, simultaneously, dip plane 212h is set, make dip plane 212h and intersection surperficial 212b than this dip plane 212h with intersection surperficial 212e near surperficial 211c211d.
According to this structure, on the 211h of dip plane, can not penetrate light to the outside from this dip plane 211h, and at least to light guide section 211 lateral reflections or scattered light.Therefore, can effectively utilize exterior light.Therefore, compare, can increase the light quantity that penetrates from surperficial 211a with the situation that does not have dip plane 211h.In addition, light guide section 212 sides are also identical with above-mentioned light guide section 211 sides.
In addition, as mentioned above, dip plane 211h and dip plane 212h can be set also, and relative above-mentioned the 9th imaginary plane with surperficial 253k of surperficial 252k is tilted.
But, in above-mentioned light guide plate 2, be illustrated for identical shape with light guide section 211 and light guide section 212, but be not limited thereto.Even the surperficial 211a of light guide section 211 is different with the area of the surperficial 212a of light guide section 212, also can make the light quantity of the per unit area that penetrates from surperficial 211a and surperficial 212a identical by the pattern that changes surperficial 211b and surperficial 212b.Therefore, also can shine uniform light this moment to the liquid crystal panel side.In addition, even under the situation of the position of limiting LED portion 203, also can pass through the ratio of the size of change light guide section 211 and light guide section 212, and penetrate light from surperficial 211a212a.
In addition, in above-mentioned light guide plate 202, be illustrated for identical shape with light guide section 215 and light guide section 216, but be not limited thereto.
Secondly, shown in Figure 69, rectangular to above-mentioned light guide plate 202 is made as (driving circuit and the driving method of each LED during n * m) describe.In the following description, rectangular light guide plate 202 is labeled as light guide plate Pij (1≤i≤n, 1≤j≤m).
Shown in Figure 70, driving circuit 270 corresponding each light guide plate Pij have LED portion 203.That is, each light guide plate Pij has red LED, green LED respectively, reaches blue led relatively.In addition, each light emitting diode is configured in the position shown in Figure 59.Below, with the order of RGB each light emitting diode of corresponding Pij is made as rij, gij, bij.
In addition, driving circuit 270 has constant pressure source 271, constant pressure source 272, on-off element QriQgbi, the 3rd control device 273, reaches the 4th not shown control device.In addition, the 3rd control device 273 has on-off element SrjSgj, Sbj, storage part 273a, reaches the 273b of current supply portion.Below, describe as the situation of on-off element Qri, Qgbi and SrjSgb, Sbj using transistor.
Below, the structure that is configured to rectangular a plurality of light guide plate 202, corresponding with each light guide plate 202 a plurality of LED portion 203, driving circuit 270 combinations is called light-conducting system.
In addition, on-off element QriQgbi is for example by making the base stage (B) that flows into this element from the electric current of the 4th control device, and comes the electric current of automatic constant voltage source 271272 from collector (C) the side emission utmost point (E) side inflow.In addition, on-off element Qri and on-off element Qgbi (that is, the element of identical i sequence number) with the base stage inflow current of identical arrangement of time to these two elements, make it constitute conducting state simultaneously by the 4th control device.The 4th control device is made as conducting state simultaneously with adjacent on-off element Qri+1Qgbi+1 after on-off element QriQgbi is become nonconducting state from conducting state.
Secondly, the 3rd control device 273 is described.
Store the information of the magnitude of current that relevant all expressions of on-off element SrjSgjSbj (being 3m element) flow into the time per unit of each element base stage at storage part 273a.
The 273b of current supply portion is owing to make whole on-off element SrjSgjSbj (being 3m element) simultaneously for conducting state, so the base stage of whole on-off element SrjSgjSbj is flow through electric current simultaneously.At this moment, the not shown control part of the 273b of current supply portion is according to the above-mentioned magnitude of current that is stored in above-mentioned each on-off element of information decision inflow in the storage part 273a.That is, the control part of the 273b of current supply portion flows through the electric current of decision respectively to each on-off element.
Each on-off element SrjSgjSbj makes electric current that should the magnitude of current from collector (C) effluent to emitter (E) side when above-mentioned current direction base stage.
But even light emitting diode is the element that sends same color light, the characteristic of the light that it sends (for example brightness and form and aspect) is also different.Therefore, according to the characteristic of each light emitting diode each light emitting diode is defined as each light emitting diode in advance and sends the magnitude of current by predetermined light quantity of all kinds, and by being stored in advance about the information of this particular current amount in the storage part 273a, can make full-luminous diode of all kinds (for example red, ri1, ri2, ri3 ... rim) send uniform light quantity by decision of all kinds.
Therefore, each LED portion 203 of corresponding each light guide plate Pij can send the white light of identical light quantity at time per unit.Therefore, can penetrate uniform white light from each light guide plate Pij.
In addition, light emitting diode in time and deterioration reduces the light quantity when luminous.Therefore, the structure of the 3rd control device 273 is made as the structure with following pattern, that is, make three light emitting diodes (rij, gij, bij) of light guide plate Pij luminous to each light guide plate under arrangement of time separately earlier, make three light emitting diodes also luminous under arrangement of time separately.In addition, on driving circuit 270, LED portion 203 is in the position of regulation relatively, and the signal transformation that produces when being provided with lumination of light emitting diode to each LED portion 3 becomes the photodiode (inverting element) of electric signal.
The structure of the 3rd control device 273 is made as following structure, and when receiving the above-said current signal that each light-emitting diodes is in control, the control part of the 273b of current supply portion changes according to the information that the semaphore that receives will be stored in storage part 273a.Specifically, make the work of the 3rd control device 273 by above-mentioned pattern, according to the minimizing of the semaphore of above-mentioned reception, above-mentioned control part changes above-mentioned information, flows to the magnitude of current of the base stage of each on-off element SrjSgjSbj with raising.
According to this structure, even under the situation of light emitting diode deterioration, the light quantity that also can in scope to a certain degree light emitting diode be sent increases.
At this moment, above-mentioned control part preferably changes above-mentioned information, so that light emitting diode of all kinds is at least with being identical light quantity on of the same colour.Thus, can always shine uniform light to the display panels side.
As above, above-mentioned light-conducting system has and is configured to light guide plate 202 rectangular, and the LED portion (light-emitting component) 203 that corresponding each light guide plate 202 is sent said external light, it is following structure, has the 3rd control device 273 that control flows into the magnitude of current of each LED portion 203.
In addition, above-mentioned light-conducting system is said to by each light-emitting component, has the structure that the converting optical signals that produces when making LED portion (light-emitting component) 203 luminous becomes the photodiode (inverting element) of electric signal.
Driving circuit 270 is, when being configured to light guide plate 202 rectangular to have, and corresponding each light guide plate 202 is when making the device of the luminous LED portion (light-emitting component) 203 of said external light be lighting device, then be in the driving circuit of each LED portion 203 supplying electric current of this lighting device, have the structure of the 3rd control device 273 that control flows to the magnitude of current of each LED portion 203.
In addition, driving circuit 270 also we can say to by each LED portion 203, has with LED portion 203 structure that the converting optical signals that produces when luminous becomes the photodiode (inverting element) of electric signal.
But, in said structure, each LED portion 203 is provided with photodiode, but is not limited thereto.For example shown in Figure 71, also can be following structure, with two light guide plate composition groups of adjacency the time, a photodiode is set to every group, be located at above-mentioned adjacency section.
Promptly, above-mentioned light-conducting system also can be said to following structure, with two light guide plate composition groups of adjacency the time, to every group, the photodiode (inverting element) that the converting optical signals that produces when luminous becomes electric signal is set in above-mentioned adjacency section LED portion (light-emitting component) 203, and respectively in the different time when luminous, above-mentioned photodiode is transformed to electric signal respectively with above-mentioned each photosignal that produces when luminous in each LED portion 203 that the light guide plate that makes corresponding above-mentioned formation group has.
According to this structure, the converting optical signals that produces when can be by two LED portions 203 that a photodiode is established corresponding photodiode luminous respectively is an electric signal.The light quantity of the light that sends when therefore, can be with each LED portion 203 luminous is judged as the level of electric signal.Therefore, by flow into the amount of the electric current of each LED portion 203 according to the level control of this electric signal, the effect of uniform light can be always penetrated in realization from the face of afore mentioned rules.
In addition, because relative two LED portions 203 have a photodiode,, can reduce cost so compare with the structure that a relative LED portion 203 has a photodiode.That is, owing to can reduce the sum of photodiode, so can reduce the manufacturing cost of driving circuit 270.
Because above-mentioned adjacency section has photodiode, so can be with the level of same benchmark comparison based on the electric signal that makes the luminous light signal of in groups LED portion 203.
In addition, for example shown in Figure 72, also can be following structure, in the time will being configured to four light guide plate composition groups of two row, two row, in every group, have a photodiode, be located at the central part of above-mentioned group of light guide plate that constitutes.
Promptly, above-mentioned light-conducting system also be we can say and is following structure, when four light guide plate composition groups that two row, two row are disposed, in every group, has with LED portion (light-emitting component) 203 photodiode (inverting element) that the converting optical signals that produces when luminous becomes electric signal at the central part that constitutes above-mentioned group light guide plate, and respectively in the different time when luminous, each photosignal of generation was transformed to electric signal respectively when above-mentioned photodiode was will be above-mentioned luminous in each LED portion 203 that the corresponding light guide plate that constitutes above-mentioned group is provided with.
According to this structure, the converting optical signals that produces when can be by a photodiode will be to four light-emitting components that should photodiode have luminous respectively is an electric signal.The light quantity of the light that sends when therefore, can be with each LED portion 203 luminous is judged as the level of electric signal.Therefore, by control flows into the amount of the electric current of each light-emitting component according to the level of this electric signal, can be for a long time penetrate uniform light from the face of afore mentioned rules.
In addition, because relative four light-emitting components have a photodiode,, can reduce cost so compare with the structure that a relative LED portion 203 has a photodiode.That is, owing to can reduce the sum of photodiode, so can reduce the manufacturing cost of driving circuit 270.
Owing to have photodiode, so the level of the electric signal of the light signal that can send based on the LED portion 203 of formation group with same benchmark comparison at the central part that constitutes above-mentioned group light guide plate.
In addition, in Figure 70, represented to drive the example of green LED and blue led, but be not limited thereto by same line.For example, also can be the element place of switches element Qgbi of every look that on-off element Qgi and on-off element Qbi are set, drive the structure of green LED and blue led respectively.
In addition, also can make the shape that is shaped as the encirclement turning part 217 shown in Figure 73 of light guide section 15 and light guide section 216.
But, shown in Figure 59, above-mentioned light guide plate 202 has been used the LED portion 203 with three light emitting diodes, but has been not limited thereto.For example shown in Figure 74, also can for red LED, green LED, and blue led be provided with two respectively, light emitting diode of all kinds is configured in the structure of the position of above-mentioned relatively intersection symmetry.
In the above-described embodiments, used two surperficial 217b of turning part 217 and surperficial 217c to reflect (turning to), but be not limited thereto from the light of 203 ones in LED portion.
For example, if the structure that will reflect from the light of 203 ones in LED portion then also can be the such curved surface of the face of circular cone except that the bottom surface.In addition, also can be for removing such four faces except that the bottom surface of quadrangular pyramid.
In addition, in the above-described embodiments, above-mentioned surperficial 217b and surperficial 217c are made of catoptrical material efficiently, needn't constitute whole surface by above-mentioned material.For the pattern that will directly import 217 inside, turning part from the part of the light of 203 ones in LED portion, and also can have the zone that constitutes by above-mentioned material and constitute by the zone of this material not.
In the said structure, use LED as pointolite (light-emitting component), but be not limited thereto, also can utilize LED light source in addition.
Also can be along above-mentioned intersection layout line light source as pointolite.
But in the above-described embodiments, for example the structure that has two slot parts with the 4th parts 252 of light guide section 215 is that example is illustrated, but the quantity of slot part is not particularly limited.
In said structure, also can form each light guide section 211～216, turning part 217 respectively, engage each one, constitute light guide plate 202.
The shape of light guide section 215 and light guide section 216 is not limited to above-mentioned shape.For example, can be for there not being the structure of the 3rd parts 251 yet.At this moment, replace surperficial 251a, also can be by the face of the liquid crystal side of the 4th parts and the 5th parts with light total reflection.
But light guide section 215 and light guide section 216 217 reflectings surface far away apart from the turning part at least, the area of reflecting surface is set greatly more.
In addition, for solving above-mentioned problem, the invention provides light guide plate, have and to guide along the face of stipulating from the regulation light of predetermined direction incident, and inject to outside light guide section from the face of afore mentioned rules, it is characterized in that having by carrying out primary event, to incide the turning part of above-mentioned light guide section from the exterior light of the opposing face side incident of the face of afore mentioned rules to above-mentioned predetermined directional steering.
According to said structure, can be by the turning part by carrying out primary event, will incide above-mentioned light guide section from the exterior light of the opposing face side incident of the face of regulation to above-mentioned predetermined directional steering.In addition, can will be to above-mentioned predetermined directional steering by light guide section, the light that incides light guide section injects to the outside from the face of regulation.
Therefore and since can be by primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide plate self slimming.
In addition, owing to the face of afore mentioned rules light along regulation guided,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type at light guide section.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily increase light-emitting area.
Therefore, realization can provide the slimming that is fit to back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
Light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, afore mentioned rules light is from first incident of above-mentioned light guide section, above-mentioned first with respect to vertical with the face of afore mentioned rules towards with the above-mentioned exterior light that turns to along the direction refraction of afore mentioned rules face towards inclination.
According to said structure, first relatively vertical with the face of afore mentioned rules towards with the above-mentioned exterior light that turns to along the direction of the face of afore mentioned rules reflect towards inclination.
Therefore, and the situation of above-mentioned vertical face tilt is not compared, can be reduced incident angle to predetermined surface incident.
Therefore, compare with above-mentioned situation about not tilting, can be from the zone of the face of regulation, and light is injected to the outside from the zone of turning part.
Therefore, realization can be penetrated the effect of more uniform light from the face of regulation.
Light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, afore mentioned rules light is from first incident of above-mentioned light guide section, when will be as the end of the above-mentioned light guide section of above-mentioned first opposition side during as terminal part, above-mentioned terminal part has the face of the scattering material that is coated with catoptrical reflecting material and scattered light, and relatively afore mentioned rules towards above-mentioned first dip plane that inclination is oblique.
According to said structure, on the dip plane, the light of guiding terminal part can not penetrate light from terminal part to the outside, and at least in light guide section reflection or scattering.
Therefore, can effectively utilize exterior light.
Therefore, compare with the situation that does not have above-mentioned dip plane, realization can increase from the effect of the light quantity of the face ejaculation of regulation.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that above-mentioned light guide section is made of first light guide section and second light guide section, above-mentioned first light guide section and second light guide section clip the configuration of above-mentioned turning part, above-mentioned turning part turns to said external light to first direction and second direction, wherein, first direction is above-mentioned predetermined direction, and becomes the direction of above-mentioned first light guide section, above-mentioned second direction is above-mentioned predetermined direction, and as the direction of above-mentioned second light guide section.
According to above-mentioned structure, can be by the turning part by carrying out primary event, will turn to above-mentioned first direction and second direction respectively from the exterior light of the opposing face side incident of predetermined surface.
Therefore, realization can be penetrated the effect of light from first light guide section that is positioned at the both sides, turning part and second light guide section.In addition, the ratio of the size by changing first light guide section and second light guide section even under the limited situation of the configured light sources of sending exterior light, also can penetrate light from the face of regulation.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned turning part has first reflecting surface and second reflecting surface of reflection said external light, above-mentioned first reflecting surface turns to said external light to above-mentioned first direction, and above-mentioned second reflecting surface turns to said external light to above-mentioned second direction.
According to said structure, can said external light be turned to above-mentioned first direction by first reflecting surface.In addition, can said external light be turned to above-mentioned second direction by second reflecting surface.
Therefore, realization can constitute the effect of turning part with simple structure.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that above-mentioned first reflecting surface and second reflecting surface are same shape, and adjacency, and form trequetrous two sides, when being intersection with the line that forms owing to above-mentioned adjacency, the face vertical with the face of afore mentioned rules, the face that promptly contains above-mentioned intersection are when determining face, the relative above-mentioned certain surface with second reflecting surface of then above-mentioned first reflecting surface is an equal angular, tilts to different directions mutually.
According to said structure,, can make by first reflecting surface identical with the light quantity of the light of second reflecting surface reflection by the direction irradiation exterior light of a certain position on above-mentioned certain surface to the face of afore mentioned rules.
Therefore, can relative first light guide section and second light guide section with the light of same light quantity as the incident of afore mentioned rules light.
In addition, light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate above-mentioned first light guide section and above-mentioned second light guide section have symmetrical shape.
According to said structure, first light guide section and above-mentioned second light guide section have symmetrical shape.
Therefore, be that the situation of asymmetrical shape is compared with first light guide section and second light guide section, realization can be with the effect of the designs simplification of light guide plate.
In addition, for solving above-mentioned problem, the invention provides light guide plate, it has the face guiding from the regulation light of predetermined direction incident along regulation, and penetrate outside light guide section from the face of afore mentioned rules, it is characterized in that, have turning part and other light guide section, wherein, the turning part is by primary event, will turn to prescribed direction from the exterior light of the opposing face side incident of afore mentioned rules face, other light guide section will be to the exterior light total reflection of the directional steering of afore mentioned rules, in inside guiding, and at a plurality of assigned positions to above-mentioned predetermined directional steering, inject above-mentioned light guide section.
According to said structure, can be by the turning part by carrying out primary event, will be from the exterior light of the opposing face side incident of the face of regulation directional steering to regulation.In addition, the exterior light that can will be turned to prescribed direction at a plurality of assigned positions by other light guide section is injected above-mentioned light guide section to predetermined directional steering.In addition, can will be to predetermined directional steering by light guide section, and the light of injecting light guide section injects to the outside from the face of regulation.
Therefore and since can be by primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
In addition, owing to the face of afore mentioned rules light along regulation guided,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type at light guide section.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily increase light-emitting area.
Therefore, realization can provide the slimming that is fit to back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
In addition, by other light guide section with exterior light in the position of a plurality of regulations the direction to above-mentioned light guide section, and above-mentioned predetermined directional steering.Therefore, even, also the light of wire can be incided above-mentioned light guide section as afore mentioned rules light using pointolite as the situation of sending the light source of exterior light.In addition, penetrate as the face of planar light by the light of light guide section from afore mentioned rules with this wire.
Therefore, also realize to use pointolite as the effect of sending the light source of exterior light.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that above-mentioned other light guide section is made of first light guide section and second light guide section, above-mentioned first light guide section and second light guide section clip the configuration of above-mentioned turning part, above-mentioned turning part turns to said external light to first direction and second direction, wherein, first direction is the direction of afore mentioned rules, and as the direction of above-mentioned first light guide section, second direction is the direction of afore mentioned rules, and as the direction of above-mentioned second light guide section.
According to said structure, can will turn to above-mentioned first direction and second direction respectively from the exterior light of the opposing face side incident of predetermined surface by carrying out primary event by the turning part.
Therefore, realization can be penetrated the effect of light via two light guide sections that are positioned at the both sides, turning part (first light guide section and second light guide section) from the predetermined surface of above-mentioned light guide section.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned light guide section is made of the 3rd light guide section and the 4th light guide section, above-mentioned the 3rd light guide section and the 4th light guide section clip above-mentioned turning part, first light guide section, and second light guide section configuration, above-mentioned first light guide section and two light guide sections of second light guide section will be at the light of above-mentioned inner guiding to third direction and four directions to turning to, wherein, third direction is above-mentioned predetermined direction, and direction as above-mentioned the 3rd light guide section, the four directions is to being above-mentioned predetermined direction, and as the direction of above-mentioned the 4th light guide section.
According to said structure, can by first light guide section will be at the light of above-mentioned inner guiding to third direction and four directions to turning to, wherein, third direction is above-mentioned predetermined direction, and direction as above-mentioned the 3rd light guide section, the four directions is to being above-mentioned predetermined direction, and as the direction of above-mentioned the 4th light guide section.In addition, equally can by second light guide section will be by the light of above-mentioned inner leaded light to third direction and above-mentioned four directions to turning to.
Therefore, realization can via two light guide sections (first light guide section and second light guide section) from be positioned at above-mentioned turning part, first light guide section, and the face of the regulation of two light guide sections (the 3rd light guide section and the 4th light guide section) of the second light guide section both sides penetrate the effect of light.
In addition, light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate, and said external is the light that sends of LED only.
According to said structure, exterior light is the light that LED sends.
Therefore, can use LED as the light that sends exterior light.
In addition,, the invention provides lighting device, it is characterized in that for solving above-mentioned problem, the light-emitting component that it has above-mentioned light guide plate and sends said external light, the light-emitting area of above-mentioned light-emitting component has light-emitting component in the position configuration of above-mentioned relatively certain surface symmetry.
According to said structure, can shine exterior light to the direction of the face of afore mentioned rules from the position of above-mentioned relatively certain surface symmetry.
Therefore, realization can make by the light quantity identical effect of first reflecting surface with the light of second reflecting surface reflection.
In addition, lighting device of the present invention is characterized in that on the basis of above-mentioned lighting device it has the light-emitting component that sends mutual different colours, and relevant each light-emitting component, in the position configuration of the above-mentioned relatively certain surface symmetry of above-mentioned light-emitting area each light-emitting component is arranged.
According to said structure, relevant each light-emitting component can shine exterior light to the direction of the face of afore mentioned rules from the position of above-mentioned relatively certain surface symmetry.
Therefore, realize relevant each light-emitting component, can make by the identical effect of light quantity of first reflecting surface with the light of second reflecting surface reflection.
In addition, for solving above-mentioned problem, the invention provides guiding device, it passes through above-mentioned light guide plate, be the mutually different light guide plate combination of the size of afore mentioned rules face and constituting, it is characterized in that, when the light guide plate that the face of afore mentioned rules is little as first light guide plate, the light guide plate that the face of afore mentioned rules is big is during as second light guide plate, will use from the ejaculation light that penetrates towards the outside of the afore mentioned rules of above-mentioned first light guide plate said external light as second light guide plate.
According to said structure, the face from the afore mentioned rules of first light guide plate can be injected to outside ejaculation light and use as the said external light of second light guide plate.
At this, even using light source as the situation of sending the light source that incides the exterior light on first light guide plate, the also exterior light that can use as second light guide plate the light of the second light guide plate incident wire.In addition, can penetrate as the predetermined surface of the light on the face by the light of second light guide plate this wire from second light guide plate.
Therefore, realization can use pointolite as the effect of sending the light source of exterior light.
In addition, for solving above-mentioned problem, light-conducting system of the present invention is configured to above-mentioned light guide plate rectangular, and corresponding each light guide plate is provided with the light-emitting component that sends said external light, it is characterized in that having the control device that control flows into the magnitude of current of each light-emitting component.
According to said structure, flow to the magnitude of current of each light-emitting component that corresponding each light guide plate has by control device control.
At this, even light-emitting component for example for to send mutually homochromy element, also often is a characteristic difference separately.Therefore, when when each light-emitting component flows into identical electric current, luminance (that is, sending brightness under the situation of whole-colored element, brightness and form and aspect under the situation of polychrome) difference then.
Therefore, can make the luminance of each light-emitting component identical by the electric current that control flows to each light-emitting component.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of each light guide plate.
In addition, for solving above-mentioned problem, the invention provides light-conducting system, it is with above-mentioned guiding device, be that above-mentioned second light guide plate is configured to rectangular, and corresponding each guiding device has the light-emitting component that sends said external light, it is characterized in that, has the control device that control flows to the magnitude of current of each light-emitting component.
According to said structure, flow to the magnitude of current of each light-emitting component that corresponding each guiding device is provided with by control device control.
At this,, also often be characteristic difference separately even light-emitting component for example sends whole-colored element.Therefore, when making each light-emitting component of same current direction, luminance difference (that is, under sending, be brightness, under the situation of polychrome, be brightness and form and aspect) with the situation of the element of a shade.
Therefore, can make the luminance of each light-emitting component identical by the electric current that control flows to each light-emitting component.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of second light guide plate of each guiding device.
In addition, light-conducting system of the present invention is characterized in that on the basis of above-mentioned light-conducting system, has with above-mentioned light-emitting component the inverting element that the converting optical signals that produces when luminous becomes electric signal in each light-emitting component.
According to said structure, can become electric signal by the converting optical signals that each inverting element produces each light-emitting component when luminous.
The light quantity of the light that produces when therefore, can be with each light-emitting component luminous is judged as the level of electric signal.
Therefore, realization can always be penetrated the effect of uniform light by flow to the magnitude of current of each light-emitting component according to the level control of this electric signal from the face of afore mentioned rules.
In addition, light-conducting system of the present invention is on the basis of above-mentioned light-conducting system, it is characterized in that, with two light guide plate composition groups of adjacency the time, to each group, the inverting element that the converting optical signals that produces when luminous becomes electric signal is set in above-mentioned adjacency section light-emitting component, and at each light-emitting component that the corresponding light guide plate that constitutes above-mentioned group is provided with respectively in the different time when luminous, each light signal of generation was transformed to electric signal respectively when above-mentioned inverting element was will be above-mentioned luminous.
According to said structure, the converting optical signals that produces when can be by an inverting element will be to two light-emitting components that should the inverting element setting luminous respectively is an electric signal.
The light quantity of the light that produces when therefore, can be with each light-emitting component luminous is judged as the level of electric signal.
Therefore, realization can always be penetrated the effect of uniform light by flow to the magnitude of current of each light-emitting component according to the level control of this electric signal from the face of afore mentioned rules.
In addition, because relative two light-emitting components have an inverting element,, can reduce cost so compare with the structure that a relative light-emitting component has an inverting element.In addition, owing to be provided with inverting element in above-mentioned adjacency section, so can be with the level of same benchmark comparison based on the electric signal of the luminous light signal of the light-emitting component of formation group.
In addition, light-conducting system of the present invention is on the basis of above-mentioned light-conducting system, it is characterized in that, when four light guide plate composition groups that two row, two row are disposed, to every group, be provided with light-emitting component the inverting element that the converting optical signals that produces when luminous becomes electric signal at the central part that constitutes above-mentioned group light guide plate, respectively in the different time when luminous, each light signal of generation was transformed to electric signal respectively when above-mentioned inverting element was will be above-mentioned luminous at each light-emitting component that the corresponding light guide plate that constitutes above-mentioned group is provided with.
According to said structure, the converting optical signals that produces when can be by an inverting element will be to four light-emitting components that should the inverting element setting luminous respectively is an electric signal.
The light quantity of the light that produces when therefore, can be with each light-emitting component luminous is judged as the level of electric signal.
Therefore, can be by control flow to the magnitude of current of each light-emitting component according to the level of this electric signal, always penetrate uniform light from the face of afore mentioned rules.
In addition, because relative four light-emitting components have an inverting element,, can reduce cost so compare with the structure that a relative light-emitting component has an inverting element.
In addition, owing to be provided with inverting element at the central part that constitutes above-mentioned group light guide plate, so can be with the level of same benchmark comparison based on the electric signal of the luminous light signal of the light-emitting component of formation group.
In addition, light-conducting system of the present invention is characterized in that on the basis of above-mentioned light-conducting system above-mentioned control device changes the above-mentioned magnitude of current that flows to each light-emitting component according to above-said current signal.
According to said structure, change the above-mentioned magnitude of current that flows to each light-emitting component according to above-said current signal by control device.
Therefore, can always penetrate uniform light from the face of afore mentioned rules.
In addition, for solving above-mentioned problem, the invention provides driving circuit, to have and be configured to above-mentioned light guide plate rectangular, and when being provided with the device of light-emitting component that corresponding each luminous plaque sends said external light as lighting device, then, it is characterized in that having the control device that control flows to the magnitude of current of above-mentioned each light-emitting component to each light-emitting component supplying electric current of above-mentioned lighting device.
According to said structure, flow to the magnitude of current of each light-emitting component that each light guide plate of corresponding lighting device is provided with by control device control.
At this,, the variant situation of characteristic is arranged still even light-emitting component for example sends whole-colored element more.Therefore, when making each light-emitting component of same current direction, luminance difference (that is, brightness under sending, brightness and form and aspect under the situation of polychrome) then with the situation of the element of a shade.
Therefore, can make the luminance of each light-emitting component identical by the electric current that control flows to each light-emitting component.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of each light guide plate of lighting device.
In addition, for solving above-mentioned problem, the invention provides driving circuit, when with above-mentioned guiding device, it is rectangular to be that above-mentioned second light guide plate is configured to, and the device that corresponding each guiding device is provided with the light-emitting component that sends said external light is during as lighting device, to each light-emitting component supplying electric current of above-mentioned lighting device, it is characterized in that having the control device that control flows to the magnitude of current of above-mentioned each light-emitting component.
According to said structure, control the magnitude of current of each light-emitting component of each guiding device setting that flows to corresponding lighting device by control device.
At this,, the variant situation of characteristic is arranged also even light-emitting component for example sends whole-colored element more.Therefore, when making each light-emitting component of same current direction, luminance difference (that is, under sending, be brightness, under the situation of polychrome, be brightness and form and aspect) with the situation of the element of a shade.
Therefore, can make the luminance of each light-emitting component identical by the electric current that control flows to each light-emitting component.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of second light guide plate of each guiding device of lighting device.
In addition, driving circuit of the present invention is characterized in that on the basis of above-mentioned driving circuit, and being provided with light-emitting component the converting optical signals that produces when luminous in each light-emitting component is the inverting element of electric signal.
According to said structure, the converting optical signals that can each light-emitting component be produced when luminous by each inverting element is an electric signal.
The light quantity of the light that produces when therefore, can be with each light-emitting component luminous is judged as the level of electric signal.
Therefore, realization can always be penetrated the effect of uniform light by flow to the magnitude of current of each light-emitting component according to the level control of this electric signal from the face of afore mentioned rules.
As above, light guide plate of the present invention has the face guiding from the regulation light of predetermined direction incident along regulation, and inject to outside light guide section from the face of afore mentioned rules, it is following structure, have by carrying out primary event, to incide the turning part of above-mentioned light guide section from the exterior light of the opposing face side incident of the face of afore mentioned rules to above-mentioned predetermined directional steering.
Therefore, realization can provide the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.
As above, light guide plate of the present invention has the face guiding from the regulation light of predetermined direction incident along regulation, and inject to outside light guide section from the face of afore mentioned rules, it is following structure, have turning part and other light guide section, wherein, the turning part is by carrying out primary event, will be from the exterior light of the opposing face side incident of the face of afore mentioned rules directional steering to afore mentioned rules, other light guide section will turn to the exterior light total reflection of afore mentioned rules direction, in inside guiding, and at a plurality of assigned positions to above-mentioned predetermined directional steering, incide the turning part of above-mentioned light guide section.
Therefore, realization can provide the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.In addition, also realize using pointolite as the effect of sending the light source of exterior light.
As above, guiding device of the present invention passes through above-mentioned light guide plate, and the light guide plate that the size of the face of afore mentioned rules is different respectively constitutes, it is following structure, when the light guide plate that the face of afore mentioned rules is little is made as first light guide plate, when the light guide plate that the face of afore mentioned rules is big is made as second light guide plate, will penetrates from the face of the afore mentioned rules of above-mentioned first light guide plate to the ejaculation light of outside said external light and use as second light guide plate.
Therefore, realize using pointolite as the effect of sending the light source of exterior light.
As above, light-conducting system of the present invention is configured to above-mentioned light guide plate rectangular, and the light-emitting component that corresponding each light guide plate is sent said external light is set, and it is following structure, has the control device that control flows to the magnitude of current of each light-emitting component.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of each light guide plate.
As above, light-conducting system of the present invention is with above-mentioned guiding device, and promptly above-mentioned second light guide plate is configured to rectangular, and the light-emitting component of said external light is sent in corresponding each guiding device setting, it is following structure, has the control device that control flows to the magnitude of current of each light-emitting component.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of second light guide plate of each guiding device.
As above, driving circuit of the present invention is following structure, when being configured to above-mentioned light guide plate rectangular, and when the device that the light-emitting component of said external light is sent in corresponding each light guide plate setting is made as lighting device, then be provided with the control device of the magnitude of current of controlling each light-emitting component that flows to above-mentioned lighting device.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of each light guide plate of lighting device.
As above, driving circuit of the present invention is following structure, when with above-mentioned guiding device, be that above-mentioned second light guide plate is configured to rectangular, and when the device that the light-emitting component of said external light is sent in corresponding each guiding device setting is made as lighting device, then be provided with the control device of the magnitude of current of controlling each light-emitting component that flows to above-mentioned lighting device.
Therefore, realization can be penetrated the effect of uniform light from the face of the regulation of second light guide plate of each guiding device of lighting device.
For solving above-mentioned problem, the invention provides light guide plate, having will be from the light of the 5th direction incident along the light-emitting area leaded light, and it is injected to outside light guide section from above-mentioned light-emitting area, it is characterized in that, have second, wherein, second mask has: reflector space, and it is by carrying out primary event, to inject above-mentioned light guide section from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering; Regional transmission makes said external light see through along the direction of above-mentioned light-emitting area side.
According to said structure, can be by second reflector space by carrying out primary event, will inject above-mentioned light guide section from the exterior light of the opposing face side incident of light-emitting area to above-mentioned the 5th directional steering.In addition, can will be to above-mentioned the 5th directional steering by light guide section, the light of injecting above-mentioned light guide section penetrates to the outside from light-emitting area.
Therefore and since can be by primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
In addition, guide along light-emitting area,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type owing to making from the light of above-mentioned first direction incident at light guide section.
In addition, owing to needn't send the light source of exterior light,, can easily be combined into above-mentioned light-emitting area rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily increase the light-emitting area of back light device.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
In addition, in light guide plate of the present invention, can the direction of exterior light to above-mentioned light-emitting area side be seen through by second regional transmission.Therefore, also can penetrate said external light from second light-emitting area lateral direction light emission face side.Therefore, and only form second light guide plate and compare, also realize to penetrate to the light-emitting area side effect of uniform light by reflector space.
Light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate, has to make the light that the sees through above-mentioned regional transmission scattering device to the direction scattering of above-mentioned light-emitting area side.
According to said structure, the light that can will be seen through via regional transmission by scattering device is to the direction scattering of light-emitting area side.
Therefore, compare with the structure that does not have scattering device, can be from the more uniform light of light-emitting area side irradiation.
In addition, light guide plate of the present invention is characterized in that having and will see through the light reflection of above-mentioned regional transmission on the basis of above-mentioned light guide plate, and with the reflection unit of this light to the direction guiding of above-mentioned light-emitting area side.
According to said structure, can reflect the light that sees through via regional transmission by reflection unit.In addition, can be by reflection unit with the direction leaded light of the above-mentioned light that sees through to the light-emitting area side.
Therefore, compare, can see through the light of this regional transmission, be i.e. the optical path length lengthening of the light that penetrates from light guide plate with the structure that does not have reflection unit.
Therefore, be under the situation of structure of radial this exterior light of ejaculation at the light source that sends exterior light, compare with the structure that does not have reflection unit, can be from the more uniform light of light-emitting area side irradiation.
In addition, light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate, and having will be by the light of the above-mentioned reflection unit reflection scattering device to the direction scattering of above-mentioned light-emitting area side.
According to said structure, the light that can will be seen through via regional transmission by scattering device is to the direction scattering of light-emitting area side.
Therefore, compare with the structure that does not have scattering device, can be from the more uniform light of light-emitting area side irradiation.
In addition, light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate above-mentioned second mask has a plurality of above-mentioned regional transmissions.
According to said structure, second mask has a plurality of above-mentioned regional transmissions.
Therefore, compare with the structure that only has a regional transmission, can be from the more uniform light of light-emitting area side irradiation.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned light guide section is made of the 5th light guide section and the 6th light guide section, above-mentioned the 5th light guide section and the 6th light guide section clip above-mentioned second configuration, above-mentioned second reflector space with said external light to the 5th light guide section direction and the 6th light guide section directional steering, wherein, the 5th light guide section direction is above-mentioned the 5th direction, and direction as above-mentioned the 5th light guide section, the 6th light guide section direction is above-mentioned the 5th direction, and as the direction of above-mentioned the 6th light guide section.
According to said structure, can by second by carrying out primary event, will be from the exterior light of the opposing face side incident of light-emitting area respectively to above-mentioned the 5th light guide section direction and the 6th light guide section directional steering.
Therefore, realization can be penetrated the effect of light from the 5th light guide section that is positioned at second both sides and the 6th light guide section.In addition, the ratio of the size by changing the 5th light guide section and the 6th light guide section is even under the limited situation of the configured light sources of sending exterior light, also can penetrate light from light-emitting area.
In addition, for solving above-mentioned problem, the invention provides light guide plate, have and to guide along light-emitting area from the light of the 5th direction incident, and from the light guide section of above-mentioned light-emitting area ejaculation to the outside, it is characterized in that, have by carrying out primary event, will be from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering, inject the reflecting surface of above-mentioned light guide section, above-mentioned reflecting surface contains the 3rd reflecting surface and the 4th reflecting surface that above-mentioned relatively light-emitting area tilts at least, and it is little that above-mentioned the 4th reflecting surface is set than above-mentioned the 3rd reflecting surface the angle of inclination of above-mentioned relatively light-emitting area, and, than the opposing face side of the 3rd reflecting surface by above-mentioned light-emitting area.
According to said structure, can be by reflecting surface by carrying out primary event, will inject above-mentioned light guide section from the exterior light of the opposing face side incident of light-emitting area to above-mentioned the 5th directional steering.In addition, can will be to above-mentioned the 5th directional steering by light guide section, the light that incides light guide section penetrates to the outside from light-emitting area.
Therefore and since can be by primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
In addition, guide along light-emitting area,, can send of the above-mentioned opposing face configuration of the light source of exterior light near light guide plate so compare with the back of the body irradiation structure of existing directly-below type owing to making from the light of above-mentioned the 5th direction incident at light guide section.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can be easily the light-emitting area of back light device be increased.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
In addition, in light guide plate of the present invention, reflecting surface comprises the 3rd reflecting surface and the 4th reflecting surface, and it is little that the 4th reflecting surface is set than above-mentioned the 3rd reflecting surface the angle of inclination of above-mentioned relatively light-emitting area.In addition, the 4th reflecting surface is than the opposing face side of the 3rd reflecting surface by above-mentioned light-emitting area.
Therefore, compare with the light guide plate that only constitutes reflecting surface by the reflecting surface with angle of inclination identical with the 3rd reflecting surface, the incoming position of the light of the plane of incidence in the time of the light that is turned to by above-mentioned reflecting surface can being incided light guide section is set in apart from the light guiding surface of light guide section position far away.Consequently, with only by comparing with the light guide plate that reflecting surface that the 3rd reflecting surface has an identical angle of inclination constitutes the structure of above-mentioned reflecting surface, can be after inciding light guide section, by position reflected light near the plane of incidence.
Therefore, with only by comparing with the light guide plate that reflecting surface that the 3rd reflecting surface has an identical angle of inclination constitutes the structure of above-mentioned reflecting surface, can be luminous to the outside from position near the 4th reflecting surface.Therefore, by comparing, also realize to penetrate the effect of more uniform light with only with the light guide plate that reflecting surface that the 3rd reflecting surface has an identical angle of inclination constitutes the structure of reflecting surface.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned light guide section is made of the 5th light guide section and the 6th light guide section, above-mentioned the 5th light guide section and the 6th light guide section clip above-mentioned reflecting surface configuration, above-mentioned reflecting surface reflects said external light to the 5th light guide section direction and the 6th light guide section direction, wherein, the 5th light guide section direction is above-mentioned the 5th direction, and direction as above-mentioned the 5th light guide section, the 6th light guide section direction is above-mentioned the 5th direction, and as the direction of above-mentioned the 6th light guide section.
According to said structure, can be by reflecting surface by carrying out primary event, will be from the exterior light of the opposing face side incident of light-emitting area respectively to above-mentioned the 5th light guide section direction and the 6th light guide section directional steering.
Therefore, realization can be penetrated the effect of light from the 5th light guide section that is positioned at the reflecting surface both sides and the 6th light guide section.In addition, the ratio of the size by changing the 5th light guide section and the 6th light guide section is even under the limited situation of the configured light sources of sending exterior light, also can penetrate light from light-emitting area.
In addition, for solving above-mentioned problem, the invention provides light guide plate, have and to guide along light-emitting area from the light of the 5th direction incident, and inject to outside light guide section from above-mentioned light-emitting area, it is characterized in that, have by carrying out primary event, will be from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering, inject the reflecting surface of above-mentioned light guide section, above-mentioned light guide section has a plurality of continuous plane of incidence of the exterior light that is turned to by above-mentioned reflecting surface being injected this light guide section, and the angle that two planes of incidence that adjoin each other in above-mentioned a plurality of continuous planes of incidence constitute mutually is greater than 90 °.
According to said structure, can be by reflecting surface by carrying out primary event, will turn to above-mentioned first direction from the exterior light of the opposing face side incident of light-emitting area, incide above-mentioned light guide section.In addition, can will be to above-mentioned the 5th directional steering by light guide section, the light that incides light guide section penetrates to the outside from light-emitting area.
Therefore and since can be by primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
In addition, guide along light-emitting area,, can send of the above-mentioned opposing face configuration of the light source of exterior light near light guide plate so compare with the back of the body irradiation structure of existing directly-below type owing to making from the light of above-mentioned the 5th direction incident at light guide section.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can be easily the light-emitting area of back light device be increased.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
In addition, light guide section has the incidence of external light that will be turned to by the above-mentioned reflecting surface a plurality of continuous plane of incidence to this light guide section.Therefore, the light that is turned to by reflecting surface can be injected in the light guide section via any plane of incidence.In addition, the angle initialization that two planes of incidence that adjoin each other in above-mentioned a plurality of continuous planes of incidence are constituted mutually is for greater than 90 °.Therefore, be that the light guide plate of 90 ° structure is compared with angle that two planes of incidence of adjacency constitute mutually, can with the outer light guide of many light quantities in light guide section apart from plane of incidence position far away.
Therefore, when light-emitting area penetrates a certain amount of light quantity, be that the light guide plate of 90 ° structure is compared at needs with angle that two planes of incidence of adjacency constitute mutually, also realizing can be with the effect along the length lengthening of the light guide section of the 5th direction.
In addition, for solving above-mentioned problem, the invention provides light guide plate, having will be from the light of the 5th direction incident along the light-emitting area leaded light, and inject to outside light guide section from above-mentioned light-emitting area, it is characterized in that, have by carrying out primary event, will be from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering, inject the reflecting surface of above-mentioned light guide section, above-mentioned reflecting surface is made of continuous a plurality of planes, and the respectively above-mentioned relatively light-emitting area of the intersection on the plane that adjoins each other in above-mentioned a plurality of planes tilts, and the direction of the normal on above-mentioned each plane is different respectively.
According to said structure, can be by reflecting surface by carrying out primary event, will incide above-mentioned light guide section from the exterior light of the opposing face side incident of light-emitting area to above-mentioned the 5th directional steering.In addition, can will be to above-mentioned the 5th directional steering by light guide section, the light that incides light guide section penetrates to the outside from light-emitting area.
Therefore and since can be by primary event with photoconduction to light guide section, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
In addition, guide along light-emitting area,, the light source that sends exterior light can be located near the above-mentioned opposing face of light guide plate so compare with the back of the body irradiation structure of existing directly-below type owing to making from the light of above-mentioned the 5th direction incident at light guide section.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can be easily the light-emitting area of back light device be increased.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
In addition, above-mentioned reflecting surface is made of continuous a plurality of planes.In addition, the respectively above-mentioned relatively light-emitting area of the intersection on the plane that adjoins each other in above-mentioned a plurality of plane tilts.Therefore, exterior light after turning to, any plane can be incided in the light guide section.
In addition, the direction of the normal on above-mentioned each plane has nothing in common with each other.Therefore, compare, also realize the light after being turned to by above-mentioned reflecting surface to be incided as more uniform radial light the effect of light guide section with the light guide plate towards identical mutually structure of the normal on each plane.
In addition, also can make the structure of above-mentioned light guide plate is that above-mentioned each plane has certain a bit as the total mutually triangular shaped structure in summit.
The structure that also can make above-mentioned light guide plate is that above-mentioned each plane has fan-shaped shape, and the intersection point of two straight lines that constitutes the profile of this shape is the structure of same position on each plane.
In addition, the invention provides lighting device, it is characterized in that, the light-emitting component that it has above-mentioned light guide plate and sends said external light.
According to said structure, even realize in lighting device, also can realizing obtaining the effect of the effect of said structure by light guide plate.
In addition, lighting device of the present invention is characterized in that on the basis of above-mentioned lighting device, and said external is the light that sends of LED portion only.
According to said structure, exterior light is the light that LED sends.
Therefore, can use LED as the light source that sends exterior light.
As above, light guide plate of the present invention has the light from the 5th direction incident is guided along light-emitting area, and inject to outside light guide section from above-mentioned light-emitting area, it is to have second structure, wherein, second mask has reflector space, and it is by carrying out primary event, to inject above-mentioned light guide section from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering; Regional transmission, it makes the direction of said external light by above-mentioned light-emitting area side.
Therefore, realization can provide the slimming that is suitable for back light device, and the light guide plate of the maximization of the light-emitting area of back light device.In addition, and only form second light guide plate and compare, also realize to penetrate to the light-emitting area side effect of uniform light by reflector space.
As above, light guide plate of the present invention has the light from the 5th direction incident is guided along light-emitting area, and inject to outside light guide section from above-mentioned light-emitting area, it is following structure, have by carrying out primary event, will be from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering, incide the reflecting surface of above-mentioned light guide section, above-mentioned reflecting surface comprises the 3rd reflecting surface and the 4th reflecting surface that above-mentioned relatively light-emitting area tilts at least, it is little that above-mentioned the 4th reflecting surface is set than above-mentioned the 3rd reflecting surface the angle of inclination of above-mentioned relatively light-emitting area, and, than the opposing face side of the 3rd reflecting surface by above-mentioned light-emitting area.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.In addition, compare, also realize to penetrate the effect of more uniform light with the light guide plate that only constitutes reflecting surface by the 3rd reflecting surface.
As above, light guide plate of the present invention has the light from the 5th direction incident is guided along light-emitting area, and inject to outside light guide section from above-mentioned light-emitting area, it is following structure, have by carrying out primary event, will be from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering, incide the reflecting surface of above-mentioned light guide section, above-mentioned light guide section has the incidence of external light that will be turned to by the above-mentioned reflecting surface a plurality of continuous plane of incidence to this light guide section, and the angle that two planes of incidence that adjoin each other in above-mentioned a plurality of continuous planes of incidence constitute mutually is greater than 90 °.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device, in addition, need penetrate from light-emitting area under the situation of a certain amount of light quantity, with angle that two planes of incidence of adjacency constitute mutually is that the light guide plate of 90 ° structure is compared, can be with the length lengthening along the light guide section of the 5th direction.
As above, light guide plate of the present invention has the light from the 5th direction incident is guided along light-emitting area, and inject to outside light guide section from above-mentioned light-emitting area, it is following structure, have by carrying out primary event, will be from the exterior light of the opposing face side incident of above-mentioned light-emitting area to above-mentioned the 5th directional steering, incide the reflecting surface of above-mentioned light guide section, above-mentioned reflecting surface is made of continuous a plurality of planes, the respectively above-mentioned relatively light-emitting area of the intersection on the plane that adjoins each other in above-mentioned a plurality of plane tilts, and the direction of the normal on above-mentioned each plane is different mutually.
Therefore, realization can provide the slimming that is suitable for back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.With the direction of the normal on each plane mutually the light guide plate of identical structure compare, also realize the light after being turned to by above-mentioned reflecting surface to be incided as more uniform radial light the effect of light guide plate.
As above, lighting device of the present invention is the structure that has above-mentioned light guide plate and send the light-emitting component of said external light.
Therefore, in lighting device, also can realize the effect that obtains by above-mentioned light guide plate.
For solving above-mentioned problem, the invention provides light guide plate, it has the guiding of the face along regulation from the regulation light of the 6th direction incident, and inject to outside light guide section from the face of afore mentioned rules, it is characterized in that having turning part and other light guide section, wherein, the turning part is by carrying out primary event, will be from the exterior light of the opposing face side incident of the face of afore mentioned rules to the 7th directional steering; Other light guide section will be to the exterior light total reflection of above-mentioned the 7th directional steering, at inner leaded light, and it is reflected to above-mentioned the 6th direction, incide above-mentioned light guide section by a plurality of reflectings surface, apart from above-mentioned turning part reflecting surface far away, the area of reflecting surface is set greatly more.
According to said structure, can be by the turning part by carrying out primary event, will be from the exterior light of the opposing face side incident of the face of regulation to above-mentioned the 7th directional steering.In addition, can will reflect to the 6th direction by a plurality of reflectings surface to the exterior light of the 7th directional steering, incide above-mentioned light guide section by other light guide section.In addition, can will incide the face ejaculation outside of the light of light guide section in the reflection of the 6th direction by light guide section from regulation.
Therefore and since can be by primary event with photoconduction to other above-mentioned light guide section, so compare with the structure that repeatedly reflects, can be with light guide section self slimming.
Owing to make the face leaded light of afore mentioned rules light at above-mentioned light guide section,, can will send of the above-mentioned opposing face setting of the light source of exterior light near light guide plate so compare with the back of the body irradiation structure of existing positive following formula along regulation.
In addition, owing to needn't send the light source of exterior light,, can be easily be combined into the face of afore mentioned rules rectangular so compare with the back of the body irradiation structure of existing peripheral type in the edge part setting of light guide plate.Therefore, can easily increase light-emitting area.
Therefore, realization can provide the slimming that is fit to back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.
In addition, by other light guide section with exterior light by the direction of a plurality of reflectings surface to above-mentioned light guide section, and above-mentioned the 6th direction reflection.Therefore, even under the situation of using pointolite as the light source that sends exterior light, also the light of wire can be incided above-mentioned light guide section as afore mentioned rules light.In addition, penetrate as the face of planar light by the light of light guide section from afore mentioned rules with this wire.
Therefore, also realize to use pointolite as the effect of sending the light source of exterior light.
But, owing at each reflecting surface of above-mentioned other light guide section above-mentioned reflection of light takes place, thus in the light quantity of the light (exterior light) of this other light guide section inner total reflection and leaded light along with reducing away from the turning part.Therefore, under the identical situation of the area of each reflecting surface, reflecting surface far away apart from the turning part, the light quantity of the light of reflection (reflection light quantity) is few more.
Therefore, in light guide plate of the present invention, reflecting surface far away apart from the turning part, the area of reflecting surface is set greatly more.Therefore, the situation identical with the area of each reflecting surface compared, and can reduce the reduction of above-mentioned reflection light quantity.
Therefore, the situation identical with the area of each reflecting surface compared, can be to the light (regulation light) of the even light quantity of above-mentioned light guide section incident.
Therefore, the situation identical with the area of each reflecting surface compared, and realization can be from the effect of the light that penetrates uniform light quantity towards the outside (regulation light) of afore mentioned rules.
In addition, light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate, disposed in parallel to each other at the reflecting surface of above-mentioned the 7th direction adjacency.
According to said structure,,, can inject light equably to above-mentioned light guide section so compare with the situation that does not dispose reflecting surface in parallel to each other owing to disposed in parallel to each other at the reflecting surface of above-mentioned second direction adjacency.
Therefore, compare with the situation that does not dispose reflecting surface in parallel to each other, realization can be penetrated effect to the outside from the face of afore mentioned rules with the light of uniform light quantity.
In addition, light guide plate of the present invention is characterized in that on the basis of above-mentioned light guide plate the face of the relative afore mentioned rules of each reflecting surface forms vertically.
According to said structure,, do not compare, can inject light to above-mentioned light guide section effectively so have the face of relative regulation to form vertical situation with reflecting surface because the face of the relative afore mentioned rules of each reflecting surface forms vertically.
Therefore, do not have the face of relative regulation to form vertical situation with reflecting surface and compare, realization can be with a large amount of light from the effect of afore mentioned rules face ejaculation to the outside.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned each reflecting surface has rectangular shape, and have limit parallel and the limit vertical with the face of afore mentioned rules with the face of afore mentioned rules, the length on above-mentioned parallel limit is identical at each reflecting surface, the reflecting surface of position far away apart from above-mentioned turning part, and the length on above-mentioned vertical limit is set longly more.
According to said structure, identical with the length on the parallel limit of face of regulation at each reflecting surface, and at the reflecting surface of the position far away apart from above-mentioned turning part, the length on the limit vertical with the face of regulation is set longly more.
Therefore, realize the reflecting surface of position far away apart from above-mentioned turning part, the area of reflecting surface be set big more effect.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned other light guide section has a plurality of slot parts at the opposing face of afore mentioned rules face, each slot part length at the bearing of trend of groove mutually is identical, and apart from above-mentioned turning part slot part far away, the degree of depth of slot part is set deeply more, relevant each slot part, the wall of the above-mentioned turning part side of slot part constitutes above-mentioned reflecting surface.
According to said structure, each slot part length at the bearing of trend of groove mutually is identical, and the slot part far away apart from the turning part, the degree of depth of slot part is set deeply more, therefore, apart from the slot part of position far away, above-mentioned turning part, can set the area of the wall of above-mentioned turning part side big more.In addition, the wall of above-mentioned turning part side constitutes above-mentioned reflecting surface.
Therefore, realize the reflecting surface of position far away apart from above-mentioned turning part, the area of reflecting surface be set big more effect.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned other light guide sections are made of the 7th light guide section and the 8th light guide section, above-mentioned the 7th light guide section and the 8th light guide section clip the configuration of above-mentioned turning part, above-mentioned turning part will be from the exterior light of the opposing face side incident of the face of afore mentioned rules to the 7th light guide section direction and the 8th light guide section directional steering, wherein, the 7th light guide section direction is above-mentioned the 7th direction, and direction as above-mentioned the 7th light guide section, above-mentioned the 8th light guide section direction is above-mentioned the 7th direction, and as the direction of above-mentioned the 8th light guide section.
According to said structure, can be by the turning part by carrying out primary event, will be from the exterior light of the opposing face side incident of the face of regulation respectively to above-mentioned the 7th light guide section direction and the 8th light guide section directional steering.
Therefore, realization can be penetrated the effect of light via two light guide sections that are positioned at the both sides, turning part (the 7th light guide section and the 8th light guide section) from the face of the regulation of above-mentioned light guide section.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned light guide section is made of the 9th light guide section and the tenth light guide section, above-mentioned the 9th light guide section and the tenth light guide section clip above-mentioned turning part, the 7th light guide section, and the 8th light guide section configuration, above-mentioned the 7th light guide section and two light guide sections of the 8th light guide section all will be at the above-mentioned inner light that guides to the 9th light guide section direction and the tenth light guide section directional steerings, wherein, the 9th light guide section direction is above-mentioned the 6th direction, and direction as above-mentioned the 9th light guide section, the tenth light guide section direction is above-mentioned the 6th direction, and as the direction of above-mentioned the tenth light guide section.
According to said structure, can will be by the light of above-mentioned inner leaded light to the 9th light guide section direction and the tenth light guide section directional steering by the 7th light guide section, wherein, the 9th light guide section direction is above-mentioned the 6th direction, and direction as above-mentioned the 9th light guide section, the tenth light guide section direction is above-mentioned the 6th direction, and as the direction of above-mentioned the tenth light guide section.In addition, same, will be by the 8th light guide section at the above-mentioned inner light that guides to above-mentioned the 9th light guide section direction and above-mentioned the tenth light guide section directional steering.
Therefore, realization can be via two light guide sections (the 7th light guide section and the 8th light guide section) with light from being positioned at above-mentioned turning part, the 7th light guide section, and the effect that penetrates of the face of the regulation of two light guide sections (the 9th light guide section and the tenth light guide section) of the 8th light guide section both sides.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, the turning part that above-mentioned turning part has reflection said external light is with first reflecting surface and turning part second reflecting surface, above-mentioned turning part will be from the exterior light of the opposing face side incident of the face of afore mentioned rules to above-mentioned the 7th light guide section directional steering with first reflecting surface, and above-mentioned turning part will be from the light of the opposing face side incident of the face of afore mentioned rules to above-mentioned the 8th light guide section directional steering with second reflecting surface.
According to said structure, can will be with first reflecting surface from the exterior light of the opposing face side incident of the face of afore mentioned rules to above-mentioned the 7th light guide section directional steering by the turning part.In addition, can will be with second reflecting surface from the exterior light of the opposing face side incident of the face of afore mentioned rules to above-mentioned the 8th light guide section directional steering by the turning part.
Therefore, realization can constitute the effect of turning part with simple structure.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned turning part is identical shaped with first reflecting surface and turning part with second reflecting surface, and adjacency, and, form trequetrous two sides, with the line that formed by above-mentioned adjacency is intersection, when will the face vertical with the face of afore mentioned rules, when the face that promptly contains above-mentioned intersection was certain surface, above-mentioned turning part was equal angular with the turning part with the relative above-mentioned certain surface of second reflecting surface with first reflecting surface, and tilted to different mutually directions.
According to said structure,, can make by the turning part identical with the turning part with the light quantity of the light of second reflecting surface reflection with first reflecting surface by the directional steering exterior light of a certain position on above-mentioned certain surface to the face of afore mentioned rules.
Therefore, can relative the 7th light guide section and the light of the identical light quantity of the 8th light guide section incident.
In addition, light guide plate of the present invention is on the basis of above-mentioned light guide plate, it is characterized in that, above-mentioned other light guide section will be from the exterior light of the opposing face side incident of the face of afore mentioned rules, promptly can't help above-mentioned turning part turns to, and is directly incident on the exterior light total reflection of this other light guide section, by inner leaded light, and reflect to above-mentioned the 6th direction by above-mentioned a plurality of reflectings surface, inject above-mentioned light guide section.
According to said structure, concerning the exterior light that does not turn to by the turning part, also can be in above-mentioned other light guide section leaded light, and the light that will guide reflects to the 6th direction, injects above-mentioned light guide section.
Therefore, the light quantity of the light that penetrates from the face of afore mentioned rules is difficult to be subjected to from the radioactive nature influence of the exterior light of the opposing face side incident of the face of afore mentioned rules.
Therefore, realization can be penetrated the effect of the light of a large amount of light quantities from the face of afore mentioned rules.
In addition,, the invention provides lighting device, it is characterized in that, have above-mentioned light guide plate and send the light-emitting component of said external light for solving above-mentioned problem.
According to said structure, even realize in lighting device, also can realizing the effect that obtains by above-mentioned light guide plate.
In addition, for solving above-mentioned problem, the invention provides light guide plate, it is characterized in that, have above-mentioned light guide plate and the light-emitting component that sends said external light, the light-emitting area of above-mentioned light-emitting component has light-emitting component in the position configuration of above-mentioned relatively certain surface symmetry.
According to said structure, can shine exterior light to the direction of the face of afore mentioned rules from the position of above-mentioned relatively certain surface symmetry.
Therefore, realization can provide and make by the turning part with first reflecting surface and the turning part effect with the identical lighting device of the light quantity of the light of second reflecting surface reflection.
In addition, lighting device of the present invention is characterized in that on the basis of above-mentioned lighting device, and said external is the light that sends of LED only.
According to said structure, exterior light is the light that LED sends.
Therefore, can use LED as the light source that sends exterior light.
As above, light guide plate of the present invention has the guiding of the face along regulation from the regulation light of the 6th direction incident, and penetrate light guide section to the outside from the face of afore mentioned rules, it is following structure, have turning part and other light guide section, wherein, the turning part is by carrying out primary event, will be from the exterior light of the opposing face side incident of the face of afore mentioned rules to the 7th directional steering; Other light guide section will guide in inside to the exterior light total reflection of above-mentioned the 7th directional steering, and is reflected to above-mentioned the 6th direction by a plurality of reflectings surface, incides above-mentioned light guide section, and apart from above-mentioned turning part reflecting surface far away, the area of reflecting surface is set greatly more.
Therefore, realization can provide the slimming that is applicable to back light device, and the effect of the light guide plate of the maximization of the light-emitting area of back light device.In addition, also realizing can be with the effect of pointolite as the light source that sends exterior light.In addition, the situation identical with the area of each reflecting surface compared, and also realizing can be from the effect that penetrates the light of uniform light quantity towards the outside of afore mentioned rules.
As above, lighting device of the present invention is the structure that has above-mentioned light guide plate and send the light-emitting component of said external light.
Therefore, even realize in lighting device, also can realizing the effect of the effect that obtains by above-mentioned light guide plate.
As above, light guide plate of the present invention is following structure, has above-mentioned light guide plate and the light-emitting component that sends said external light, and the light-emitting area of above-mentioned light-emitting component determines in the face of the position configuration that claims light-emitting component is arranged above-mentioned relatively.
Therefore, realization can provide and make by the turning part with first reflecting surface and the turning part effect with the identical lighting device of the light quantity of the light of second reflecting surface reflection.
The concrete example and the embodiment that carry out in the detailed description of the invention item have so far understood technology contents of the present invention, but be not interpreted as only being limited in such concrete example with not answering narrow sense, spirit of the present invention and below in the claim item put down in writing, can implement various changes.
Claims (49)
1. light guide plate, it has the face guiding from the regulation light of predetermined direction incident along regulation, and with its outside light guide section of face ejaculation from described regulation, it is characterized in that, has the turning part, this turning part is by carrying out primary event, will be from the exterior light of the opposing face side incident of described predetermined surface to described predetermined directional steering, incide described light guide section, described light guide section is made of first light guide section and second light guide section, described first light guide section and second light guide section clip the configuration of described turning part, and described turning part turns to described exterior light to first direction and second direction, wherein, first direction is described predetermined direction, and as the direction of described first light guide section, second direction is described predetermined direction, and as the direction of described second light guide section.
2. light guide plate as claimed in claim 1, it is characterized in that, described regulation is only from first incident of described first light guide section, described first light guide section described first with respect to the face vertical with the face of described regulation towards the direction of the described exterior light that turns to the refraction of the direction of described predetermined surface tilted, described regulation light also is from first incident of described second light guide section, described second light guide section described first with respect to the face vertical with the face of described regulation towards the direction of the described exterior light that turns to the direction refraction of described predetermined surface tilted.
3. light guide plate as claimed in claim 1, it is characterized in that, described regulation is only from first incident of described first light guide section, will be as the end of described first light guide section of described first opposition side of described first light guide section as terminal part, the described terminal part of then described first light guide section has the dip plane, this dip plane is to be coated with reflecting material that makes the light reflection or the face that makes the scattering material of light scattering, and described first inclination towards described first light guide section of described relatively regulation is oblique, described regulation light also is from first incident of described second light guide section, will be as the end of described second light guide section of described first opposition side of described second light guide section as terminal part, the described terminal part of then described second light guide section has the dip plane, this dip plane is to be coated with reflecting material that makes the light reflection or the face that makes the scattering material of light scattering, and described first inclination towards described second light guide section of described relatively regulation is oblique.
4. light guide plate as claimed in claim 1, it is characterized in that, described turning part has first reflecting surface of described external light reflection and second reflecting surface, described first reflecting surface turns to described exterior light to described first direction, and described second reflecting surface turns to described exterior light to described second direction.
5. light guide plate as claimed in claim 4, it is characterized in that, described first reflecting surface and second reflecting surface are identical shaped, its in abutting connection with and form trequetrous two sides, to be made as intersection owing to the line that described adjacency forms, and face that will be vertical with the face of described regulation and the face that contains described intersection be when being made as certain surface, and the relative described certain surface with second reflecting surface of described first reflecting surface is an equal angular, and tilts to different mutually directions.
6. light guide plate as claimed in claim 1 is characterized in that, described first light guide section and described second light guide section have symmetrical shape.
7. light guide plate as claimed in claim 1 is characterized in that, described exterior light is the light that LED sends.
8. a lighting device is characterized in that, has described light guide plate of claim 5 and the light-emitting component that sends described exterior light, and the mode that described light-emitting component is cut apart the light-emitting area of described light-emitting component with described certain surface equalization disposes.
9. lighting device as claimed in claim 8 is characterized in that, it has the light-emitting component that sends different mutually colors, and about each light-emitting component, the mode of cutting apart the light-emitting area of described each light-emitting component with described certain surface equalization disposes each light-emitting component.
10. guiding device, it is with the described light guide plate of claim 1, and the mutual different light guide plate of size that is described predetermined surface constitutes, it is characterized in that, when the light guide plate that the face of described regulation is little as first light guide plate, the light guide plate that the face of described regulation is big is during as second light guide plate, will use as the described exterior light of second light guide plate from the ejaculation light that penetrates towards the outside of the described regulation of described first light guide plate.
11. a light-conducting system is configured to the described light guide plate of claim 1 rectangular, and corresponding each light guide plate is provided with the light-emitting component that sends described exterior light, it is characterized in that, has the control device that control flows to the magnitude of current of each light-emitting component.
12. light-conducting system as claimed in claim 11 is characterized in that, it is the conversion element of electric signal that each light-emitting component is provided with described light-emitting component the converting optical signals that produces when luminous.
13. light-conducting system as claimed in claim 11, it is characterized in that, with two light guide plate composition groups of adjacency the time, to every group, be provided with light-emitting component the inverting element that the change in optical signal that produces when luminous becomes electric signal in described adjacency section, issue the light time at each light-emitting component that the corresponding light guide plate that constitutes described group is provided with in different separately arrangements of time, each light signal of generation was transformed to electric signal respectively when described inverting element was will be described luminous.
14. light-conducting system as claimed in claim 11, it is characterized in that, when four light guide plate composition groups that two row, two row are disposed, to every group, be provided with light-emitting component the inverting element that the converting optical signals that produces when luminous becomes electric signal at the central part that constitutes described group light guide plate, issue the light time in each comfortable different arrangement of time of each light-emitting component that the corresponding light guide plate that constitutes described group is provided with, each light signal of generation was transformed to electric signal respectively when described inverting element was will be described luminous.
15. light-conducting system as claimed in claim 12 is characterized in that, described control device changes the described magnitude of current that flows to each light-emitting component according to described electric signal.
16. light-conducting system, second light guide plate described in the described guiding device of claim 10 is configured to rectangular, and corresponding each guiding device is provided with the light-emitting component that sends described exterior light, it is characterized in that having the control device that control flows to the magnitude of current of each light-emitting component.
17. driving circuit, when the described light guide plate of claim 1 is configured to device that rectangular and corresponding each light guide plate is provided with the light-emitting component that sends described exterior light as lighting device, then to each light-emitting component supplying electric current of described lighting device, it is characterized in that, be provided with control device, this control device control flows to the magnitude of current of described each light-emitting component.
18. driving circuit as claimed in claim 17 is characterized in that, each light-emitting component is provided with light-emitting component the inverting element that the converting optical signals that produces when luminous becomes electric signal.
19. driving circuit, when being made as second light guide plate described in the described guiding device of claim 10 rectangular, and, the device that corresponding each guiding device is provided with the light-emitting component that sends described exterior light is during as lighting device, each light-emitting component supplying electric current to described lighting device, this driving circuit is characterised in that, is provided with control device, and this control device control flows to the magnitude of current of described each light-emitting component.
20. a lighting device is characterized in that, has described light guide plate of claim 1 and the light-emitting component that sends described exterior light.
21. lighting device as claimed in claim 20 is characterized in that, described exterior light is the light that LED sends.
22. light guide plate, it has the face guiding from the regulation light of predetermined direction incident along regulation, and with its outside light guide section of face ejaculation from described regulation, it is characterized in that, have: the turning part, it is by carrying out primary event, will be from the exterior light of the opposing face side incident of the described predetermined surface directional steering to regulation; Other light guide section, it will carry out total reflection to the exterior light that described prescribed direction turns to, in inside guiding, simultaneously, at a plurality of assigned positions with it to described predetermined directional steering, inject described light guide section.
23. light guide plate as claimed in claim 22, it is characterized in that, described other light guide section is made of first light guide section and second light guide section, described first light guide section and second light guide section clip the configuration of described turning part, and described turning part turns to described exterior light to first direction and second direction, wherein, first direction is the direction of described regulation, and as the direction of described first light guide section, second direction is the direction of described regulation, and as the direction of described second light guide section.
24. light guide plate as claimed in claim 22, it is characterized in that, described light guide section is made of the 3rd light guide section and the 4th light guide section, described the 3rd light guide section and the 4th light guide section clip described turning part, first light guide section and the configuration of second light guide section, described first light guide section and two light guide sections of second light guide section also will be at the light of described inner guiding to third direction and four directions to turning to, wherein, third direction is described predetermined direction, and direction as described the 3rd light guide section, the four directions is to being described predetermined direction, and as the direction of described the 4th light guide section.
25. light guide plate, have and to guide along light-emitting area from the light of the 5th direction incident, and, light guide section from described light-emitting area penetrates to the outside is characterized in that having second, this second mask has: reflector space, it is by carrying out primary event, will inject described light guide section from the exterior light of the opposing face side incident of described light-emitting area to described the 5th directional steering; Regional transmission, it makes the direction transmission of described exterior light to described light-emitting area side.
26. light guide plate as claimed in claim 25 is characterized in that, has to see through the scattering device of the light of described regional transmission to the scattering of described light-emitting area side direction.
27. light guide plate as claimed in claim 25 is characterized in that, has to see through the light reflection of described regional transmission, and with the reflection unit of this light to described light-emitting area side direction guiding.
28. light guide plate as claimed in claim 27 is characterized in that, having will be by the light of the described reflection unit reflection scattering device to the scattering of described light-emitting area side direction.
29. light guide plate as claimed in claim 25 is characterized in that, described second mask has a plurality of described regional transmissions.
30. light guide plate as claimed in claim 25, it is characterized in that, described light guide section is made of the 5th light guide section and the 6th light guide section, described the 5th light guide section and the 6th light guide section clip described second configuration, described second reflector space with described exterior light to the 5th light guide section direction and the 6th light guide section directional steering, wherein, the 5th light guide section direction is described the 5th direction, and direction as described the 5th light guide section, described the 6th light guide section direction is described the 5th direction, and as the direction of described the 6th light guide section.
31. light guide plate, have and to guide along light-emitting area from the light of the 5th direction incident, and from the outside light guide section of described light-emitting area ejaculation, it is characterized in that, having will be from the exterior light of the opposing face side incident of described light-emitting area to described the 5th directional steering by carrying out primary event, incide the reflecting surface of described light guide section, described reflecting surface has the 3rd reflecting surface and the 4th reflecting surface that described relatively light-emitting area tilts at least, described the 4th reflecting surface forms to such an extent that the angle of inclination of described relatively light-emitting area is littler than described the 3rd reflecting surface, and than the opposing face side of the 3rd reflecting surface near described light-emitting area.
32. light guide plate as claimed in claim 31, it is characterized in that, described light guide section is made of the 5th light guide section and the 6th light guide section, described the 5th light guide section and the 6th light guide section clip described reflecting surface configuration, described reflecting surface reflects described exterior light to the 5th light guide section direction and the 6th light guide section direction, wherein, the 5th light guide section direction is described the 5th direction, and direction as described the 5th light guide section, described the 6th light guide section direction is described the 5th direction, and as the direction of described the 6th light guide section.
33. light guide plate, have and to guide along light-emitting area from the light of the 5th direction incident, and from the light guide section of described light-emitting area to the outside ejaculation, it is characterized in that, having will be from the exterior light of the opposing face side incident of described light-emitting area to described the 5th directional steering by carrying out primary event, incide the reflecting surface of described light guide section, described light guide section has the incidence of external light that will be turned to by the described reflecting surface a plurality of continuous plane of incidence to this light guide section, and the angle that two planes of incidence that adjoin each other in described a plurality of continuous planes of incidence constitute mutually is greater than 90 °.
34. light guide plate, have and to guide along light-emitting area from the light of the 5th direction incident, and from the light guide section of described light-emitting area to the outside ejaculation, it is characterized in that, having will be from the exterior light of the opposing face side incident of described light-emitting area to described the 5th directional steering by carrying out primary event, incide the reflecting surface of described light guide section, described reflecting surface is made of continuous a plurality of planes, the respectively described relatively light-emitting area of the intersection on the plane that adjoins each other in described a plurality of plane tilts, and the direction of the normal on described each plane is different mutually.
35. light guide plate as claimed in claim 34 is characterized in that, it a bit is the triangular shaped of summit that described each plane has by coexistence.
36. light guide plate as claimed in claim 34 is characterized in that, described each plane has fan-shaped shape, and the intersection point of two straight lines that constitutes the profile of this shape is identical position on each plane.
37. light guide plate, have and to guide along predetermined surface from the regulation light of the 6th direction incident, and from the light guide section that penetrates towards the outside of described regulation, it is characterized in that, have, the turning part, it will be from the exterior light of the opposing face side incident of the face of described regulation to the 7th directional steering by carrying out primary event; Other light guide section, its will be to described the 7th directional steering exterior light carry out total reflection, in inner channeling conduct, and reflect to described the 6th direction by a plurality of reflectings surface, incide described light guide section, apart from described turning part reflecting surface far away, the area of reflecting surface forms greatly more.
38. light guide plate as claimed in claim 37 is characterized in that, is disposed in parallel to each other each other at the reflecting surface of described the 7th direction adjacency.
39. light guide plate as claimed in claim 37 is characterized in that, the face of the described relatively regulation of each reflecting surface vertically forms.
40. light guide plate as claimed in claim 39, it is characterized in that, described each reflecting surface has rectangular shape, and have limit parallel and the limit vertical with the face of described regulation with the face of described regulation, the length on described parallel limit is identical at each reflecting surface, apart from the reflecting surface of position far away, described turning part, the length on described vertical limit is long more.
41. light guide plate as claimed in claim 37, it is characterized in that, described other light guide section has a plurality of slot parts at the opposing face of the face of described regulation, in each slot part, the length of the bearing of trend of groove is identical, and apart from described turning part slot part far away, the degree of depth of slot part is dark more, about each slot part, the wall of the described turning part side of slot part constitutes described reflecting surface.
42. light guide plate as claimed in claim 37, it is characterized in that, described other light guide section is made of the 7th light guide section and the 8th light guide section, described the 7th light guide section and the 8th light guide section clip the configuration of described turning part, described turning part will be from the exterior light of the opposing face side incident of the face of described regulation to the 7th light guide section direction and the 8th light guide section directional steering, wherein, the 7th light guide section direction is described the 7th direction, and direction as described the 7th light guide section, described the 8th light guide section direction is described the 7th direction, and as the direction of described the 8th light guide section.
43. light guide plate as claimed in claim 42, it is characterized in that, described light guide section is made of the 9th light guide section and the tenth light guide section, described the 9th light guide section and the tenth light guide section clip described turning part, the 7th light guide section and the configuration of the 8th light guide section, described the 7th light guide section and the 8th light guide section two light guide sections all at the light that described inside is directed to the 9th light guide section direction and the tenth light guide section directional steering, wherein, the 9th light guide section direction is described the 6th direction, and direction as described the 9th light guide section, described the tenth light guide section direction is described the 6th direction, and as the direction of described the tenth light guide section.
44. light guide plate as claimed in claim 42, it is characterized in that, described turning part has the turning part of the described exterior light of reflection with first reflecting surface and turning part second reflecting surface, described turning part will be from the exterior light of the opposing face side incident of described predetermined surface to described the 7th light guide section directional steering with first reflecting surface, and described turning part will be from the exterior light of the opposing face side incident of described predetermined surface to described the 8th light guide section directional steering with second reflecting surface.
45. light guide plate as claimed in claim 44, it is characterized in that, described turning part is identical shaped with first reflecting surface and turning part with second reflecting surface, in abutting connection with and form trequetrous two sides, to be made as intersection owing to the line that described adjacency forms, and face that will be vertical and be that the face that contains described intersection is when being made as certain surface with the face of described regulation, described turning part is equal angular with the turning part with the relative described certain surface of second reflecting surface with first reflecting surface, and tilts to different mutually directions.
46. light guide plate as claimed in claim 37, it is characterized in that, described other light guide section will and be can't help described turning part from the exterior light of the opposing face side incident of described predetermined surface and be turned to and be directly incident on the exterior light total reflection of this other light guide section, guide in inside, simultaneously, reflect to described the 6th direction by described a plurality of reflectings surface, inject described light guide section.
47. a lighting device is characterized in that, has described light guide plate of claim 37 and the light-emitting component that sends described exterior light.
48. lighting device as claimed in claim 47 is characterized in that, described exterior light is the light that LED sends.
49. a lighting device is characterized in that, has described light guide plate of claim 45 and the light-emitting component that sends described exterior light, the position configuration with described certain surface symmetry in the light-emitting area of described light-emitting component has light-emitting component.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005043221A JP4343128B2 (en) | 2005-02-18 | 2005-02-18 | Light guide plate, light guide device, illumination device, light guide system, and drive circuit |
| JP43221/05 | 2005-02-18 | ||
| JP130564/05 | 2005-04-27 | ||
| JP274745/05 | 2005-09-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1821847A CN1821847A (en) | 2006-08-23 |
| CN100474065C true CN100474065C (en) | 2009-04-01 |
Family
ID=36923295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100086277A Expired - Fee Related CN100474065C (en) | 2005-02-18 | 2006-02-20 | Light guide plate, light guide device, lighting device, light guide system, and drive circuit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4343128B2 (en) |
| CN (1) | CN100474065C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024732A (en) * | 2015-11-04 | 2017-08-08 | 三星显示有限公司 | The back light unit of display device and correlation |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4784527B2 (en) * | 2007-02-23 | 2011-10-05 | オムロン株式会社 | Light guide fixture and light guide device |
| JP5077052B2 (en) * | 2008-04-28 | 2012-11-21 | 富士通株式会社 | Mobile terminal device |
| JP5169594B2 (en) | 2008-08-01 | 2013-03-27 | セイコーエプソン株式会社 | Illumination device and liquid crystal display device |
| JP5202238B2 (en) | 2008-11-14 | 2013-06-05 | 富士通コンポーネント株式会社 | keyboard |
| JP5060592B2 (en) * | 2010-06-04 | 2012-10-31 | 京楽産業．株式会社 | Game machine |
| CN103629625B (en) * | 2012-08-24 | 2016-01-20 | 财团法人车辆研究测试中心 | Modular microfluidic structure guiding device |
| CN106999773A (en) * | 2014-12-10 | 2017-08-01 | 世嘉飒美创意股份有限公司 | The light-emitting device and housing of game device |
| KR102566497B1 (en) * | 2016-04-15 | 2023-08-16 | 엘지이노텍 주식회사 | Light Emitting apparatus and illumination apparatus including the apparatus |
| JP6713970B2 (en) * | 2017-09-28 | 2020-06-24 | 株式会社デンソー | Operating device |
| WO2019200992A1 (en) * | 2018-04-19 | 2019-10-24 | Oppo广东移动通信有限公司 | Light guide structure, casing, and electronic device |
-
2005
- 2005-02-18 JP JP2005043221A patent/JP4343128B2/en not_active Expired - Fee Related
-
2006
- 2006-02-20 CN CNB2006100086277A patent/CN100474065C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024732A (en) * | 2015-11-04 | 2017-08-08 | 三星显示有限公司 | The back light unit of display device and correlation |
| CN107024732B (en) * | 2015-11-04 | 2020-07-28 | 三星显示有限公司 | Display device and related backlight unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1821847A (en) | 2006-08-23 |
| JP2006228635A (en) | 2006-08-31 |
| JP4343128B2 (en) | 2009-10-14 |
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