CN101865425B - Light guide plate and light incident structure thereof - Google Patents
Light guide plate and light incident structure thereof Download PDFInfo
- Publication number
- CN101865425B CN101865425B CN2010101899350A CN201010189935A CN101865425B CN 101865425 B CN101865425 B CN 101865425B CN 2010101899350 A CN2010101899350 A CN 2010101899350A CN 201010189935 A CN201010189935 A CN 201010189935A CN 101865425 B CN101865425 B CN 101865425B
- Authority
- CN
- China
- Prior art keywords
- light
- lgp
- light entrance
- entrance structures
- pointolite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses a light guide plate, which is used for receiving light rays from at least one point light source and guiding out the light rays. The light guide plate is provided with an effective light emergent area and a transitional area arranged between the effective light emergent area and a point light source and comprises a light incident surface, a light emergent surface, a light reflecting surface and a plurality of light incident structures, wherein the light incident surface is adjacent to the point light source so as to receive light rays emitted by the point light source; an included angle is formed between the light incident surface and the light emergent surface; light advancing in the light guide plate is guided out from the light emergent surface; the light reflecting surface is positioned at the opposite side of the light emergent surface so as to guide the light entering the light guide plate from the light incident surface to the light emergent surface; the light incident structures are distributed in the transitional area of the light guide plate; the front face of each light incident structure, encountering incident light, is a cylindrical curved surface; and at least one sinking part sunk towards the opposite direction of the directing of the curved surface is arranged on the curved surface. The light guide plate and the light incident structure thereof have favorable brightness distribution uniformity and can provide effective light emergent region with larger area.
Description
The present invention is to be that March 5, application number in 2008 are 200810082069.8, denomination of invention is divided an application for " LGP and light entrance structures thereof thereof " a case the applying date.
Technical field
The present invention has good expansion light effect and can significantly improve LGP and the light entrance structures thereof thereof into optical efficiency about a kind of.
Background technology
General line source is CCFL (cold cathode fluorescent lamp for example; CCFL) because volume is bigger, be not suitable for the portable electric device of small size.Therefore, for example the portable electric device of mobile phone uses the sidelight source of pointolite as its LCD MODULE usually.Fig. 1 is the simplified schematic diagram of an existing backlight module 100, and is as shown in Figure 1, for example light emitting diode 104 (light-emitting diode; LED) pointolite is in abutting connection with a light incident sides 102a of LGP 102, and the bottom surface 102c of LGP 102 is formed with the prism structure that V-groove 106 is constituted.In this existing design; Because the lighting angle of pointolite and energy relationship follow lambert to radiate law (Lambert ' s emission law); When the sidelight source of adopting light emitting diode 104 as LCD MODULE; And collocation prismatic lens (not shown) is with after near light correcting to the LGP 102 exiting surface 102b normal directions; As shown in Figure 2, occur contrasting strong bright band 110 and blanking bar 112 distributions easily at the regional area that is close to light incident sides 102a, and obviously reduce the brightness distribution uniformity of LGP 102.
Therefore; In prior art; The design of a kind of light entrance structures thereof is suggested to improve the problems referred to above, for example shown in Figure 3ly on incidence surface 122, forms the triangular prism works and constitutes a V and go into minor structure 120, or as shown in Figure 4ly on incidence surface 132, form the column structure thing and constitute a R and go into minor structure 130; To provide the light diffusion effect, improve the optical efficiency of going into of pointolite simultaneously to improve the bright/blanking bar difference problem of LGP light inlet.Yet; Existing V goes into minor structure 120 or R, and to go into the expansion luminous energy power of minor structure 130 limited; Even these light entrance structures thereofs are set; Strong bright/blanking bar the region area of contrast that distributes on the LGP is still quite big, does not make the integral brightness distributing homogeneity still good and can't further improve the area of the effective output optical zone of LGP.
Summary of the invention
Therefore; The object of the present invention is to provide a kind ofly to have good expansion light effect and can significantly improve LGP and the light entrance structures thereof thereof into optical efficiency, the LGP with this light entrance structures thereof has favorable brightness distribution uniformity and the effective bright dipping of larger area zone can be provided.
In an embodiment of the invention, a kind of in order to receive the light that sends from least one pointolite and with the LGP of its derivation, comprise an incidence surface, an exiting surface, a light reflection surface, and a plurality of light entrance structures thereofs.The light that incidence surface neighbor point light source sends with the acceptance point light source, and the light of advancing in LGP inside is to derive via exiting surface.Light reflection surface is positioned at the exiting surface offside will be got into the light guiding exiting surface of LGP by incidence surface.LGP has an effective output optical zone and the zone of transition between between effective output optical zone and pointolite, and a plurality of light entrance structures thereof is distributed in the zone of transition of LGP.Its front that meets with incident light of each light entrance structures thereof is the part elliptic cylinder, and this elliptic cylinder has major axis and the minor axis that is uneven in length.Through this design; Because of this light entrance structures thereof can provide good light diffusion effect; So can be with the reduced distances of pointolite to effective output optical zone but still can keep favorable brightness distribution uniformity; To enlarge the effect of the effective output optical zone area on the LGP, and compare existing light entrance structures thereof and have preferable go into optical efficiency and average luminance.
In another embodiment of the present invention, a kind of in order to receive the light that sends from least one pointolite and with the LGP of its derivation, comprise an incidence surface, an exiting surface, a light reflection surface, and a plurality of light entrance structures thereofs.The light that incidence surface neighbor point light source sends with the acceptance point light source, and the light of advancing in LGP inside is to derive via exiting surface.Light reflection surface is positioned at the exiting surface offside will be got into the light guiding exiting surface of LGP by incidence surface.LGP has an effective output optical zone and the zone of transition between between effective output optical zone and pointolite, and a plurality of light entrance structures thereof is distributed in the zone of transition of LGP.Its front that meets with incident light of each light entrance structures thereof is a cylinder curved surface, and this curved surface has at least one towards the recessed depressed part of this curved surface directed in opposite directions.Through this design; Because of this light entrance structures thereof can provide good light diffusion effect; So can be with the reduced distances of pointolite to effective output optical zone but still can keep good briliancy homogeneity; To enlarge the effect of the effective output optical zone area on the LGP, and compare existing light entrance structures thereof and have preferable go into optical efficiency and average luminance.
The present invention also provides a kind of light entrance structures thereof; Be formed at effective output optical zone of a LGP and the LGP zone of transition between a pointolite; The front of the incident light that this this pointolite of light entrance structures thereof experience sends is the part elliptic cylinder, and this elliptic cylinder has major axis and the minor axis that is uneven in length.Through this design; This light entrance structures thereof can provide good light diffusion effect; So can be with the reduced distances of pointolite to effective output optical zone but still can keep good briliancy homogeneity; To enlarge the effect of the effective output optical zone area on the LGP, and compare existing light entrance structures thereof and have preferable go into optical efficiency and average luminance.
Another kind of light entrance structures thereof provided by the invention; Be formed at effective output optical zone of a LGP and the LGP zone of transition between a pointolite; Its front that meets with incident light of this light entrance structures thereof is a cylinder curved surface, and this curved surface has at least one towards the recessed depressed part of this curved surface directed in opposite directions.Through this design; This light entrance structures thereof can provide good light diffusion effect; So can be with the reduced distances of pointolite to effective output optical zone but still can keep good briliancy homogeneity; To enlarge the effect of the effective output optical zone area on the LGP, and compare existing light entrance structures thereof and have preferable go into optical efficiency and average luminance.
Description of drawings
Fig. 1 is the synoptic diagram of an existing backlight module.
Fig. 2 be an existing LGP bright/simplified schematic diagram that blanking bar distributes.
Fig. 3 is the synoptic diagram of an existing light entrance structures thereof.
Fig. 4 is the synoptic diagram of another existing light entrance structures thereof.
Fig. 5 is the synoptic diagram of an embodiment of LGP design of the present invention.
Fig. 6 compares the key diagram that has now into the preferable smooth diffusivity of minor structure tool for the oval light entrance structures thereof of the present invention.
Fig. 7 is the elliptic cylinder track simplified schematic diagram of the oval light entrance structures thereof of explanation.
Fig. 8 A to Fig. 9 B is for when the distance of the effective output optical zone of pointolite to LGP is 4.65mm, utilize different light entrance structures thereofs and luminous energy simulation distribution figure.
Figure 10 A is the synoptic diagram of oval another embodiment of light entrance structures thereof of the present invention.
Figure 10 B is the synoptic diagram of oval another embodiment of light entrance structures thereof of the present invention.
Figure 11 is the synoptic diagram of oval another embodiment of light entrance structures thereof of the present invention.
Figure 12 is the synoptic diagram of oval another embodiment of light entrance structures thereof of the present invention.
Figure 13 is the synoptic diagram of oval another embodiment of light entrance structures thereof of the present invention.
Figure 14 is the synoptic diagram of oval another embodiment of light entrance structures thereof of the present invention.
Figure 15 is the synoptic diagram of another embodiment of LGP design of the present invention.
Figure 16 A to Figure 16 F is the synoptic diagram of W type light entrance structures thereof external form variant of the present invention.
Figure 17 compares the key diagram that has now into the preferable smooth diffusivity of minor structure tool for W type light entrance structures thereof of the present invention.
Figure 18 A to Figure 19 B is for when the distance of the effective output optical zone of pointolite to LGP is 4.65mm, utilize different light entrance structures thereofs and luminous energy simulation distribution figure.
Figure 20 is the synoptic diagram of another embodiment of LGP design of the present invention.
Figure 21 is the synoptic diagram of another embodiment of LGP design of the present invention.
Figure 22 is the synoptic diagram of another embodiment of LGP design of the present invention.
Figure 23 is the synoptic diagram of another embodiment of LGP design of the present invention.
Figure 24 goes out the light characteristic comparison diagram for light entrance structures thereof of the present invention and existing light entrance structures thereof.
Figure 25 A to Figure 25 D is the synoptic diagram of oval structure external form variant of the present invention.
Figure 26 is the synoptic diagram of another embodiment of LGP design of the present invention.
The main element symbol description
12,32 LGPs
12a, 32a incidence surface
12b, 32b exiting surface
12c, 32c light reflection surface
14 light emitting diodes
16,36 light entrance structures thereofs
The 16a elliptic cylinder
The oval end face of 16b
18 V-grooves
22 LGP sides
The 36a column side face
The 36b depressed part
100 backlight modules
102 LGPs
The 102a light incident sides
The 102b exiting surface
The 102c bottom surface
104 light emitting diodes
106 V-grooves
110 bright bands
112 blanking bars
120 V go into minor structure
122,132 incidence surfaces
130 R go into minor structure
The positive arc surface of 130a
C1-C4, E1-E4, I1-I4, W1-W4 light path
The AR cambered surface
The R radius-of-curvature
θ recessed face drift angle
The δ distribution angle
Embodiment
Fig. 5 is an embodiment synoptic diagram of LGP design of the present invention.As shown in Figure 5, LGP 12 is in order to the light (being illustrated as two light emitting diodes 14) that receives to a little less light source and send and with its derivation.The side of the contiguous light emitting diodes 14 of LGP 12 forms an incidence surface 12a, and the end face that forms an angle with incidence surface 12a forms an exiting surface 12b, and the bottom surface that is positioned at exiting surface 12b offside forms a light reflection surface 12c.Light reflection surface 12c is distributed with a plurality of prism structures that V-groove 18 is constituted on the whole surface, and the long axis direction of each V-groove 18 is parallel to each other.After the light that light emitting diode 14 sends gets into LGP 12 inside via incidence surface 12a, the light guiding exiting surface 12b that light reflection surface 12c will advance in LGP 12 inside again, last light leaves LGP 12 via exiting surface 12b.
Design according to present embodiment; Incidence surface 12a is formed with a plurality of oval light entrance structures thereofs 16; Each oval light entrance structures thereof 16 is arranged on the incidence surface 12a with the parallel mode of long axis direction, and its distributed areas are contained the summary view field of each light emitting diode 14 on incidence surface 12a at least.The front that oval light entrance structures thereof 16 meets with incident light is part elliptic cylinder 16a, and the end face 16b of oval light entrance structures thereof 16 has the part elliptical profile.Fig. 6 goes into the key diagram of the preferable smooth diffusivity of minor structure tool for the oval light entrance structures thereof 16 existing R of explanation.As shown in Figure 6, the travel path that incident light I1-I4 meets with behind the positive arc surface 130a deviation that R goes into minor structure is path C1-C4 (dotted portion); On the other hand, to meet with the travel path behind the elliptic cylinder 16a deviation of oval light entrance structures thereof be path E1-E4 (solid line part) to incident light I1-I4.The offset distance and the path E1-E4 that compare path I1-I4 by path C1-C4 relatively compare path I1-I4 offset distance and can clearly find out; The intrinsic geometric shape of elliptic cylinder 16a can bring the effect that increases the incident light offset distance, and meaning is that the light diffusivity of oval light entrance structures thereof 16 is obviously preferable.Therefore, as shown in Figure 7 according to the design of present embodiment, elliptic cylinder 16a track is followed equation (X
2/ α
2)+(Y
2/ β
2(wherein α is that major axis and β are minor axis in)=1; α ≠ β).Moreover elliptic cylinder 16a is from the some P of incidence surface 12a maximum distance and the distance of incidence surface 12a, when being made as the intercept greater than the crossing two-end-point M of elliptic cylinder 16a and incidence surface 12a, N, preferable light diffusion effect arranged.
Please again with reference to figure 5; Under the environment of pointolite as the sidelight source; LGP can be divided into an effective output optical zone EA and a zone of transition TA, zone of transition TA neighbor point light source position and have contrast strong bright/blanking bar distributes, size that can't be through changing the site and density are remedied to become and are stayed the white area.In effective output optical zone EA, because of light spread comparatively even, so effective viewing area (AA district) that can a superimposed display panels is as the practical function zone that area source is provided.The existing V that uses with 1.8 o'clock standard backlight modules goes into minor structure and is example, when light emitting diode when effectively output optical zone EA distance is 4.65mm, the LGP front end is bright/blanking bar briliancy difference value is 189.15cd/m
2, this value can be considered acceptable critical value, if the bright/blanking bar briliancy difference value of LGP front end is greater than this critical value 189.15cd/m
2The time, be not good briliancy homogeneity.Moreover, if shorten the distance of pointolite, can increase the bright/blanking bar briliancy difference value of LGP front end to effective output optical zone EA.Therefore; Through oval 16 of the light entrance structures thereofs of present embodiment good light diffusion effect is provided; Can be with the reduced distances of pointolite to effective output optical zone EA; And still can keep good briliancy homogeneity (bright/blanking bar briliancy difference value is still less than critical value), obtain to increase the effect of the effective output optical zone EA area on the LGP.Fig. 8 A to Fig. 9 B is for when the distance of the effective output optical zone of pointolite to LGP is 4.65mm, utilize different light entrance structures thereofs and luminous energy simulation distribution figure.Comparison diagram 8A and Fig. 8 B can know, it is smooth trapezoidal and crest Fig. 8 A is sharp-pointed triangle that the crest of Fig. 8 B is, and the oval light entrance structures thereof 16 that can find out Fig. 8 B is gone into minor structure than the existing V of Fig. 8 A has preferable expansion luminous energy power.Same comparison diagram 9A and Fig. 9 B can know, it is smooth trapezoidal and crest Fig. 9 A is sharp-pointed triangle that the crest of Fig. 9 B is, and the oval light entrance structures thereof 16 that can find out Fig. 9 B is gone into minor structure than the existing R of Fig. 9 A has preferable expansion luminous energy power.Therefore, the area of zone of transition TA is dwindled, in other words can obtain significantly to increase the effect of the effective output optical zone EA of LGP area because of oval light entrance structures thereof 16 has splendid light diffusion effect.
According to the design of present embodiment, oval light entrance structures thereof 16 only need be arranged at zone of transition TA and get final product to reach the light diffusion effect, and its arrangement and distribution mode on LGP 12 does not limit.For example, be formed at oval light entrance structures thereof on the incidence surface 12a and do not need as shown in Figure 5ly all have identical size, and can be shown in Figure 10 A, the two adjacent ellipses light entrance structures thereofs 16 that are formed on the incidence surface 12a are of different sizes.In addition, shown in Figure 10 B, oval light entrance structures thereof 16 can be and is formed at that incidence surface 12a goes up and towards the groove structure of LGP 12 internal recess, and is not defined as the out-of-plane projection cube structure of LGP that protrudes in shown in Figure 5.Moreover; Oval light entrance structures thereof 16 is not limited to be formed on the incidence surface 12a; For example also can be shown in figure 11; Formation plurality of grooves structure and corresponding each light emitting diode 14 positional alignment are a line in zone of transition TA, perhaps only need each light emitting diode 14 corresponding oval light entrance structures thereof 16 can obtain effect of the present invention.In addition, also can be shown in figure 12, oval light entrance structures thereof 16 is formed at incidence surface 12a simultaneously and goes up in the transitional region TA that reaches except that this incidence surface, with further raising light diffusion effect.Moreover; In embodiment shown in Figure 12; The elliptic cylinder that is formed at the oval light entrance structures thereof 16 of incidence surface 12a points to towards light emitting diode 14; And its elliptic cylinders of oval light entrance structures thereof 16 that are formed in the transitional region TA except that incidence surface point to away from light emitting diode 14, but this configuration do not limit, and visual actual light diffusion effect changes arbitrarily.
Figure 13 is the synoptic diagram of another embodiment of the present invention.Shown in figure 13, in adopt single light emitting diode 14 as sidelight source environment under, light emitting diode 14 can place a corners of contiguous LGP 12, and the bight of LGP 12 forms a cross section to distribute oval light entrance structures thereof 16 and as incidence surface 12a.Moreover, with the LGP side 22 of this incidence surface 12a adjacency can shown in figure 13ly be a plane or shown in figure 14 be a curved surface.
Figure 15 is the synoptic diagram of another W type light entrance structures thereof of the present invention embodiment.Shown in figure 15; Design according to present embodiment; The reflecting surface 32c of LGP 32 is distributed with a plurality of prism structures that V-groove 18 is constituted, and the incidence surface 32a of LGP 32 is formed with a plurality of W type light entrance structures thereofs 36, and the end face that forms an angle with incidence surface 32a forms an exiting surface 32b.Each W type light entrance structures thereof 36 is arranged on the incidence surface 32a with the parallel mode of long axis direction, and its distributed areas are contained the summary view field of each light emitting diode 14 on incidence surface 32a at least.Its fronts that meet with incident lights of W type light entrance structures thereof 36 are a column side face 36a, and this column side face 36a is a curved surface, and this curved surface has at least onely towards the recessed depressed part 36b of this curved surface directed in opposite directions, make whole light entrance structures thereof 36 present W font outward appearance.The profile of this column side face 36a only is required to be a curved surface and gets final product; For example the face of cylinder (Figure 16 A), elliptic cylinder (Figure 16 D) or the revocable cambered surface of curvature (Figure 16 B) all can; And depressed part 36b its cross-sectional shape recessed toward reverse direction do not limit, and for example can be ellipse (Figure 16 A, Figure 16 D), triangle (Figure 16 B, Figure 16 E) or circle (Figure 16 C, Figure 16 F) and all can.In present embodiment, when column side face 36a was a cylindrical side, the radius-of-curvature of this cylindrical side was that 1 μ m to 1000 μ m is preferable; When column side face 36a was an elliptic cylinder, the ultimate range of elliptic cylinder and incidence surface was preferable with the intercept that intersects less than elliptic cylinder and incidence surface.In addition, shown in Figure 16 B and Figure 16 E, when depressed part 36b had the design of leg-of-mutton recessed face, this recessed face vertex angle theta angular range was that 2 degree are preferable to 150 degree.
Figure 17 goes into the key diagram of the preferable smooth diffusivity of minor structure tool for explanation W type light entrance structures thereof 36 existing R.Shown in figure 17; Because of W type light entrance structures thereof 36 has a depressed part 36b; The light path W4 of the incident light I4 that does not meet with depressed part 36b after through boundary surface with go into the minor structure boundary surface through an imaginary R after light path C4 identical; But the incident light I1-I3 that meets with depressed part 36b can produce deviation significantly after through boundary surface, and meaning promptly meets with the light path C1-C3 that light path W1-W3 behind the depressed part can be goes into after the minor structure boundary surface (no depressed part) through an imaginary R has bigger offset distance.Therefore; The W type light entrance structures thereof 36 of tool depressed part 36b can provide good expansion light effect; So get final product the distance of reduced point light source to effective output optical zone and can not make the bright dark difference value of LGP front end exceed critical value, acquisition enlarges the effect of effective output optical zone EA area of LGP.Figure 18 A to Figure 19 B is for when the distance of the effective output optical zone of pointolite to LGP is 4.65mm, utilize different light entrance structures thereofs and luminous energy simulation distribution figure.Comparison diagram 18A and Figure 18 B can know, it is smooth trapezoidal and crest Figure 18 A is sharp-pointed triangle that the crest of Figure 18 B is, and the W type light entrance structures thereof 36 existing V that can find out Figure 18 B go into minor structure has preferable expansion luminous energy power.Same comparison diagram 19A and Figure 19 B can know, it is smooth trapezoidal and crest Figure 19 A is sharp-pointed triangle that the crest of Figure 19 B is, and the W type light entrance structures thereof 36 existing R that can find out Figure 19 B go into minor structure has preferable expansion luminous energy power.
Moreover aforementioned arrangement and distribution mode about oval light entrance structures thereof 16 changes, and all is suitable for the W type light entrance structures thereof 36 of present embodiment.For example, W type light entrance structures thereof 36 can be and is formed at that incidence surface 32a goes up and towards the groove structure (Figure 20) of LGP 32 internal recess, or protrudes in the out-of-plane projection cube structure of LGP (Figure 15); W type light entrance structures thereof 36 can only be formed on the incidence surface 32a, only be formed in the transitional region TA except that this incidence surface 32a or be formed at incidence surface 32a simultaneously and go up in the transitional region TA that reaches except that this incidence surface.In addition; Like Figure 20 and shown in Figure 21, when W type light entrance structures thereof 36 collocation single point light sources, this pointolite can be arranged at the bight of contiguous LGP 32 equally; And also can on incidence surface, form oval light entrance structures thereof 16, in the transitional region TA except that this incidence surface, form W type light entrance structures thereof 36 again.Perhaps, can on incidence surface, form W type light entrance structures thereof 36, in the transitional region TA except that this incidence surface, form oval light entrance structures thereof 16 again.Certainly, oval light entrance structures thereof 16 of the present invention or 36 designs of W type light entrance structures thereof, the LGP use that the existing tool R that also can arrange in pairs or groups goes into son or V goes into minor structure is to improve the expansion light effect.For example, can be shown in figure 22, on incidence surface, form V and go into minor structure 120, in the transitional region TA except that this incidence surface, form W type light entrance structures thereof 36 again.Perhaps, shown in figure 23, also can on incidence surface, form V and go into minor structure 120, in the transitional region TA except that this incidence surface, form oval light entrance structures thereof 16 again.In addition in transitional region TA; Can a W type light entrance structures thereof 36 or oval light entrance structures thereof 16 only be set corresponding each light emitting diode 14 position, also can a plurality of W type light entrance structures thereofs 36 or the oval light entrance structures thereof 16 that arrangement is a line be set corresponding each light emitting diode 14 position.
Figure 24 tabular go out that inventor's realistic simulation the present invention and existing light entrance structures thereof go out light characteristic and numerical value.Under the same terms, after the incident light that pointolite sends expanded light via oval light entrance structures thereof 16, when pointolite to effective output optical zone air line distance was reduced to 2.5mm, the bright/blanking bar briliancy difference value of LGP front end was 187.9cd/m
2, this is worth in critical range, and always light radiant flux is 0.111W, and average luminance is 74.52cd/m
2Therefore; Oval light entrance structures thereof 16 of the present invention is compared existing V and is gone into the air line distance (reduction 46.24%) that minor structure not only can shorten pointolite to effective output optical zone; Increase effective output optical zone area (increasing by 5.57%), and can significantly improve into optical efficiency (promoting 21.62%) and average luminance (promoting 14.78%).On the other hand, after the incident light that pointolite sends expanded light via W type light entrance structures thereof 36, when pointolite to effective output optical zone air line distance was reduced to 2.5mm, the bright/blanking bar briliancy difference value of LGP front end was 189.06cd/m
2, this is worth in critical range, and always light radiant flux is 0.113W, and average luminance is 75.48cd/m
2Therefore; W type light entrance structures thereof 36 of the present invention is compared existing V and is gone into the air line distance (reduction 46.24%) that minor structure not only can shorten pointolite to effective output optical zone; Increase effective output optical zone area (increasing by 5.57%), and can significantly improve into optical efficiency (promoting 21.62%) and average luminance (promoting 14.78%).Moreover, can find out that by the measuring value of tabular W type light entrance structures thereof 36 is compared oval light entrance structures thereof 16 and can further be improved into optical efficiency and average luminance.
Moreover, according to the oval light entrance structures thereof 16 of the present invention design, do not need as shown in Figure 7ly, elliptic cylinder 16a has and follows equation (X fully
2/ α
2)+(Y
2/ β
2The track of)=1 is roughly oval track and only need have, and can obtain effect of the present invention.For example, elliptic cylinder 16a can comprise simultaneously the just round track section (Figure 25 A) of the positive oval track section of part and part, simultaneously comprise positive oval track section of part and polygonal track section (Figure 25 B, Figure 25 C), or the variations such as sub-elliptical (Figure 25 D) that constitute for multi-line section all can.
In addition, though all to be formed in the oval light entrance structures thereof 16 of previous embodiment be that it does not limit on the incidence surface on a plane.Shown in figure 26, oval light entrance structures thereof 16 also can be formed on the cambered surface AR, and the radius of curvature R of this cambered surface AR is preferably 0.3mm to 1.2mm, and the distribution angle δ of oval light entrance structures thereof 16 on cambered surface AR can be 0 degree to 180 degree, and is preferably 70 degree to 150 degree.The elliptic cylinder of oval light entrance structures thereof 16 has major axis α and the minor axis β that is uneven in length, and the ratio of major axis α and minor axis β is preferably 1.25 to 1.65.
The above is merely illustrative, but not is restrictive.For example on the LGP reflecting surface, do not limit and form the prism structure that V-groove constituted, also can form like any leaded light microstructures such as arcuate structure things, the effect that the light that only need be able to obtain to be advanced in LGP inside is derived gets final product.Therefore, anyly do not break away from spirit of the present invention and category, and, all should be contained in the protection domain of claims, but not be defined in the above embodiments its equivalent modifications of carrying out or change.
Claims (8)
1. LGP, in order to receive the light that sends from least one pointolite and it is derived, this LGP has an effective output optical zone and reaches the zone of transition between between this effective output optical zone and this pointolite, it is characterized in that this LGP comprises:
One incidence surface, contiguous this pointolite is to receive the light that this pointolite sends;
Form an exiting surface of an angle with this incidence surface, the light of advancing in this LGP inside is derived via this exiting surface;
One light reflection surface, this light reflection surface are positioned at the offside of this exiting surface will be got into this exiting surface of light guiding of this LGP by this incidence surface; And
A plurality of light entrance structures thereofs; Be distributed in this zone of transition of this LGP; The distributed areas of those light entrance structures thereofs are contained the respectively summary view field of this pointolite on this zone of transition at least; Respectively this light entrance structures thereof has the cross-sectional shape that summary is the W word, and respectively its front that meets with incident light of this light entrance structures thereof is a cylinder curved surface, and this curved surface has at least one towards the recessed depressed part of this curved surface directed in opposite directions.
2. LGP as claimed in claim 1 is characterized in that, those light entrance structures thereofs are formed on this incidence surface and for protruding in the out-of-plane projection cube structure of this LGP or towards the groove structure of this LGP internal recess.
3. LGP as claimed in claim 1 is characterized in that, those light entrance structures thereofs comprise and are formed at a plurality of first light entrance structures thereofs on this incidence surface and are formed at least one second light entrance structures thereof except that this incidence surface in this zone of transition.
4. like any described LGP among the claim 1-3, it is characterized in that this cylinder curved surface is the part face of cylinder, and the radius-of-curvature on this face of cylinder is 1 μ m to 1000 μ m.
5. like any described LGP among the claim 1-3, it is characterized in that this depressed part has ellipse or circular cross-sectional shape.
6. like any described LGP among the claim 1-3, it is characterized in that this depressed part has leg-of-mutton cross-sectional shape, and the drift angle of this triangle recessed face is that 2 degree are to 150 degree.
7. like any described LGP among the claim 1-3; It is characterized in that; This cylinder curved surface is an elliptic cylinder, and the long axis direction of the elliptic cross-section of the elliptic cylinder of those light entrance structures thereofs is parallel, and effective viewing area of this an effective output optical zone and a display panel is superimposed.
8. LGP as claimed in claim 3 is characterized in that, those second light entrance structures thereofs are arranged at least one line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101899350A CN101865425B (en) | 2008-03-05 | 2008-03-05 | Light guide plate and light incident structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101899350A CN101865425B (en) | 2008-03-05 | 2008-03-05 | Light guide plate and light incident structure thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810082069A Division CN101526639A (en) | 2008-03-05 | 2008-03-05 | Light guide plate and light entrance structures thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101865425A CN101865425A (en) | 2010-10-20 |
| CN101865425B true CN101865425B (en) | 2012-02-01 |
Family
ID=42957253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101899350A Expired - Fee Related CN101865425B (en) | 2008-03-05 | 2008-03-05 | Light guide plate and light incident structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101865425B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849793A (en) * | 2014-02-19 | 2015-08-19 | 广州奥翼电子科技有限公司 | Electronic paper display screen light-guiding plate and electronic paper display screen |
| EP3040605B1 (en) * | 2015-01-02 | 2021-03-03 | Goodrich Lighting Systems GmbH | Light unit with an extended light emission surface |
| CN105204108B (en) * | 2015-10-08 | 2018-03-13 | 京东方光科技有限公司 | Edge-type light guide plate, backlight module and preparation method thereof and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508603A (en) * | 2002-12-20 | 2004-06-30 | 鸿富锦精密工业（深圳）有限公司 | Area Light source |
| CN1653296A (en) * | 2002-05-20 | 2005-08-10 | 三菱丽阳株式会社 | Planar light source and light guide for use therein |
| CN201004094Y (en) * | 2007-01-22 | 2008-01-09 | 瑞仪光电股份有限公司 | Light guiding board for light source with equable dispersion |
-
2008
- 2008-03-05 CN CN2010101899350A patent/CN101865425B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653296A (en) * | 2002-05-20 | 2005-08-10 | 三菱丽阳株式会社 | Planar light source and light guide for use therein |
| CN1508603A (en) * | 2002-12-20 | 2004-06-30 | 鸿富锦精密工业（深圳）有限公司 | Area Light source |
| CN201004094Y (en) * | 2007-01-22 | 2008-01-09 | 瑞仪光电股份有限公司 | Light guiding board for light source with equable dispersion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101865425A (en) | 2010-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9329328B2 (en) | Light guide plate and backlight module using the same | |
| US10371350B2 (en) | Asymmetric turning film with multiple light sources | |
| CN101424769B (en) | Light guide board | |
| CN101718417B (en) | Liquid crystal display and light guide plate thereof | |
| CN103307512A (en) | Surface light source device and liquid crystal display device | |
| CN101329423A (en) | Light conducting plate and backlight module unit | |
| US10338302B2 (en) | Light source device | |
| US9482809B2 (en) | Planar light source | |
| WO2010010494A1 (en) | Luminaire device with several lighting units | |
| CN103926645A (en) | Light guiding plate, backlight module and display device | |
| TWI412801B (en) | Light guide plate and light diffusing structure thereof | |
| US9222646B2 (en) | Luminous flux control member, light emitting apparatus, and illuminating apparatus | |
| US20160238777A1 (en) | Light guide plate ,light source module and display device | |
| EP2082164B1 (en) | Lighting device | |
| CN102966916A (en) | Symmetric serrated edge light guide film having elliptical base segments | |
| CN101865425B (en) | Light guide plate and light incident structure thereof | |
| US20130063975A1 (en) | Asymmetric serrated edge light guide film having elliptical base segments | |
| TWM445701U (en) | Backlight module and light guide plate | |
| US8439548B2 (en) | Symmetric serrated edge light guide having circular base segments | |
| US8031405B2 (en) | Optical adjusting apparatus with composite pattern structure | |
| US20070058104A1 (en) | Light guide plate with W-shaped structures and backlight module using the same | |
| US20120294029A1 (en) | Backlight and display device with the backlight | |
| US20150029750A1 (en) | Light guide plate and backlight module incorporating the same | |
| KR100523081B1 (en) | Light guide for back light unit | |
| CN101526639A (en) | Light guide plate and light entrance structures thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: HU'NAN QIU ZEYOU PATENT STRATEGIC PLANNING CO., LT Free format text: FORMER OWNER: QIU ZEYOU Effective date: 20101102 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 410005 28/F, SHUNTIANCHENG, NO.185, FURONG MIDDLE ROAD, CHANGSHA CITY, HU'NAN PROVINCE TO: 410205 JUXING INDUSTRY BASE, NO.8, LUJING ROAD, CHANGSHA HIGH-TECH. DEVELOPMENT ZONE, YUELU DISTRICT, CHANGSHA CITY, HU'NAN PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20101104 Address after: 523119 Guangdong city of Dongguan province Dongcheng District mulberry Community Industrial Road No. 239 Applicant after: Dongguan Master LCD Monitors Co., Ltd. Co-applicant after: Shenghua Science and Technology Co., Ltd. Address before: Taiwan, China Applicant before: Shenghua Science and Technology Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20160305 |