CN102466168A - Line light source and LCD (liquid crystal display) device - Google Patents
Line light source and LCD (liquid crystal display) device Download PDFInfo
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- CN102466168A CN102466168A CN2010105319960A CN201010531996A CN102466168A CN 102466168 A CN102466168 A CN 102466168A CN 2010105319960 A CN2010105319960 A CN 2010105319960A CN 201010531996 A CN201010531996 A CN 201010531996A CN 102466168 A CN102466168 A CN 102466168A
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Abstract
The invention discloses a line light source and an LCD (liquid crystal display) device, relates to the technical field of liquid crystal display, and provides the line light source for displaying color sequences, which is invented for reducing the using number of point light sources. The line light source comprises at least one point light source and a linear light conduction component, wherein the light conduction component comprises an incident plane, an emergent plane and a fully reflecting plane; the point light sources are adjacent to the incident plane; light rays emitted from the point light sources enter the light conduction component through the incident plane; the fully reflecting plane is in a fully reflecting structure and is used for making the light rays which enter the light conduction component propagated in the light conduction component through full reflection; and the emergent plane is extended along the length direction of the light conduction component and makes partial light which reaches the emergent plane from the inner side of the light conduction component emerge by destroying full reflection conditions. The line light source and the LCD device can be used for the liquid crystal display.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to a kind of line source and liquid crystal indicator.
Background technology
Advantage such as that liquid crystal indicator has is in light weight, volume is little, power consumption is low is widely used in the products such as computer, mobile communication terminal, personal digital assistant.
Because liquid crystal itself is not luminous, therefore need realize Presentation Function with auxiliary its for it provides module backlight.In module backlight, adopt cathode fluorescent tube as light source at present usually.Though cathode fluorescent tube has the luminosity advantages of higher, have also that uniformity of luminance is poor, the life-span is short, gamut range is narrow, operating voltage high (power consumption is high) and contaminated environment defectives such as (mercurous).For this reason, use light emitting diode to replace cathode fluorescent tube to become main flow trend on the market now.
Light emitting diode is limited as its illumination zone of spot light; The liquid crystal indicator of existing side-light type need adopt a plurality of light emitting diodes to line up wire as the sidelight source; In order to guarantee module good optical characteristic backlight such as uniformity of luminance etc.; Just need to keep the spacing between two adjacent light emitting diodes can not be excessive, therefore need to use the more light emitting diode of number, cost be higher.Correspondingly,, then make module backlight produce the uneven phenomenon of light and shade easily, reduced the uniformity of luminance of module backlight if reduce the use number of light emitting diode.
Summary of the invention
Embodiments of the invention provide a kind of line source and liquid crystal indicator, on the basis that guarantees module uniformity of luminance backlight, to reduce the use number of spot light.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of line source comprises at least one spot light and Line of light transport element,
Said photo-conduction cell comprises the plane of incidence, exit facet and fully reflecting surface.
The contiguous said plane of incidence setting of said spot light, the light that said spot light sends gets into said photo-conduction cell through the said plane of incidence;
Said fully reflecting surface is the total reflection structure, is used to make get into the inner light of said photo-conduction cell through the internal communication of total reflection at said photo-conduction cell;
Said exit facet extends along the length direction of said photo-conduction cell, and makes said photo-conduction cell inside arrive the part light outgoing of said exit facet through destroying total reflection condition.
A kind of liquid crystal indicator comprises above-mentioned line source, LGP and liquid crystal panel, and the exit facet of said line source is towards the incidence surface setting of said LGP.
Line source that the embodiment of the invention provides and liquid crystal indicator; Because the light that said spot light sends is after the said plane of incidence gets into said photo-conduction cell; Can under the effect of said fully reflecting surface, make and get into the inner light of said photo-conduction cell through the internal communication of total reflection at said photo-conduction cell; And in communication process, from said photo-conduction cell, penetrate through said exit facet; Wherein said exit facet extends along the length direction of said Line of light transport element, and the light that therefore penetrates from said exit facet forms line source.This line source is compared with spot light, has enlarged illumination zone, has improved illumination uniformity, need not every separated very little one section a spot light promptly is set, and can on the basis that guarantees module uniformity of luminance backlight, reduce the use number of spot light.
Description of drawings
Fig. 1 is the sketch map of line source in the one embodiment of the invention;
Fig. 2 is first kind of structural representation of photo-conduction cell described in the embodiment of the invention;
The sketch map that Fig. 3 propagates in photo-conduction cell for light in the embodiment of the invention;
Fig. 4 is second kind of structural representation of photo-conduction cell described in the embodiment of the invention;
Fig. 5 is the third structural representation of photo-conduction cell described in the embodiment of the invention;
Fig. 6 is the 4th a kind of structural representation of photo-conduction cell described in the embodiment of the invention;
Fig. 7 is the 5th a kind of structural representation of photo-conduction cell described in the embodiment of the invention;
Fig. 8 is the 6th a kind of structural representation of photo-conduction cell described in the embodiment of the invention;
Fig. 9 is the sketch map after line source shown in Figure 1 is improved;
Figure 10 is the sketch map of line source in the another embodiment of the present invention;
Figure 11 is to a kind of improved sketch map of line source shown in Figure 10;
Figure 12 is to the another kind of improved sketch map of line source shown in Figure 10;
Figure 13 is the left view of Figure 12.
Reference numeral:
The 2-line source, 21,21 (0), 21 (1), 21 (2), 21 (3)-spot lights, 21 (0)-white point light sources, 21 (1)-red spot light sources, 21 (2)-green glow spot lights; 21 (3)-blue light point light sources, 22-photo-conduction cell, the 221-plane of incidence, 222-exit facet, 226-fully reflecting surface; 223-first light pipe, 224-second light pipe, 225-total reflection film, 23-transmittance structure, 231-micro-structural; The 232-site, 30-light converges cover, 31-first ellipsoid, 32-second ellipsoid, 33-the 3rd ellipsoid.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the invention line source and liquid crystal indicator are described in detail.
Should be clear and definite, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making all other embodiment that obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Like Fig. 1 and shown in Figure 10, be the specific embodiment of line source of the present invention.In the present embodiment, said line source 2 comprises a spot light 21 and Line of light transport element 22, and photo-conduction cell 22 comprises the plane of incidence 221, exit facet 222 and fully reflecting surface 226.Wherein the spot light 21 contiguous planes of incidence 221 are provided with, and the light that spot light 21 sends gets into photo-conduction cell 22 through the plane of incidence 221; Fully reflecting surface 226 is the total reflection structure, is used to make the light that gets into photo-conduction cell 22 inside through the internal communication of total reflection at photo-conduction cell 22; Exit facet 222 extends along the length direction of photo-conduction cell 22, and makes photo-conduction cell 22 inside arrive the part light outgoing of exit facets 222 through destroying total reflection condition.
The line source that the embodiment of the invention provides; Because the light that spot light 21 sends is after the plane of incidence 221 gets into photo-conduction cell 22; Can under the effect of fully reflecting surface 226, make the light that gets into photo-conduction cell 22 inside through the internal communication of total reflection at photo-conduction cell 22; And in communication process, penetrate from photo-conduction cell 22 through exit facet 222, wherein exit facet 22 extends along the length direction of this Line of light transport element 22, and the light that therefore penetrates from exit facet 222 forms line source.This line source is compared with spot light, has enlarged illumination zone, has improved illumination uniformity, need not every separated very little one section a spot light promptly is set, and can on the basis that guarantees module uniformity of luminance backlight, reduce the use number of spot light.
Need to prove that in the various embodiments of the present invention, the number of line source 2 employed spot lights 21 can be one or more, this can select according to the required requirements such as luminosity that reach.For example, when said spot light 21 is the white point light source that emits white light, can use a white point light source in the line source 2, further improve the luminosity of line source 2 if desired, can also use two or more white point light source.When said spot light 21 comprises red spot light source, green glow spot light and blue light point light sources, can in a line source 2, use this three spot lights simultaneously.
In the embodiments of the invention; Not only can make the spot light conversion form line source on the basis that guarantees module uniformity of luminance backlight, to reduce the use number of spot light; And red spot light source, green glow spot light and blue light point light sources are circulated in regular turn send red light, green light and blue ray; Realize that with this look preface shows, and reach the effect that improves the efficiency of light energy utilization and spatial resolution.To come through concrete embodiment these contents are carried out detailed explanation below.Wherein, following embodiment one specifically describes spot light conversion formation line source; Following embodiment two specifically describes in the basic enterprising circumstances in which people get things ready for a trip preface that the spot light conversion is formed line source and shows.
Need to prove; Below in the accompanying drawing of each embodiment for show clear for the purpose of; Some parts have been used schematic method for expressing, and these schematically show real construction and the ratio of not representing these parts, and its real construction and ratio can be referring to the descriptions in the specification.For example, the light that inner chamber is ellipsoid converges cover and has promptly adopted schematic method for expressing, and the micro-structural in the said photo-conduction cell has been adopted the method for expressing that amplifies.
Embodiment one
As shown in Figure 1, said line source 2 comprises the white point light source 21 (0) and the Line of light transport element 22 of the coloured light line that turns white in the present embodiment, and Line of light transport element 22 is used for converting the light that white point light source 21 (0) sends into line source.Photo-conduction cell 22 comprises the plane of incidence 221, exit facet 222 and fully reflecting surface 226.Wherein, White point light source 21 (0) the contiguous planes of incidence 221 are provided with; The light that sends gets into Line of light transport element 22 through the plane of incidence 221, and fully reflecting surface 226 is the total reflection structure, is used to make the light that get into Line of light transport element 22 inside to propagate in wire photo-conduction cell 22 through total reflection; Exit facet 222 extends along the length direction of photo-conduction cell 22, and through destroying the part beam projecting that total reflection condition makes that Line of light transport element 22 is inner.
In actual use, photo-conduction cell 22 can be selected the photo-conduction cell of following two kinds of structures for use.Perhaps, also can select the photo-conduction cell of other structures except that following two kinds of structures for use.
First kind of structure; As shown in Figure 2; Said photo-conduction cell 22 comprises wire first light pipe 223 that can carry out total reflection; The side of first light pipe 223 comprises the exit facet 222 and fully reflecting surface 226 that adjoins each other, and exit facet 222 is provided with the transmittance structure 23 of the total reflection that destroys first light pipe 223.
As shown in Figure 3; The light that gets into first light pipe 223 can be divided into two parts; A part is the meridional ray of propagating along the meridian plane (through the plane of first light pipe, 223 axis) of first light pipe 223; This part light can be in the meridian plane upper edge of first light pipe 223 straight ahead, and the ratio that this part light occupies in the light that gets into first light pipe 223 is less; Another part is the oblique ray without meridian plane transmission, and this part light can carry out repeatedly total reflection in first light pipe 223, and the axis that departs from first light pipe 223 in the shape of a spiral formula advance.The large percentage that this part light occupies in the light that gets into first light pipe 223; And compare with meridional ray; Most of light in this part light can both pass through after the total reflection and from exit facet 222, penetrate, and the utilization rate of light that therefore gets into first light pipe 223 is higher.
The transmittance structure 23 that destroys total reflection condition is set on exit facet 222, the light pipe 223 inner light of winning can be penetrated through exit facet 222.The transmittance structure 23 of this destruction total reflection condition can have multiple.For example, with reference to shown in Figure 2, this transmittance structure 23 can be for being located at the micro-structural 231 on the exit facet 222.This micro-structural 231 specifically can be little rib structure of different shape, nick point, dimpling point etc.Micro-structural 231 with little rib structure is an example, and under state shown in Figure 2, these micro-structurals 231 can vertically be arranged on exit facet 222 along the vertical direction.Perhaps under state shown in Figure 4, these micro-structurals 231 can be carried out transversely arranged along left and right directions on exit facet 222.Perhaps these micro-structurals 231 can oblique arrangement on exit facet 222 again.Wherein, the beam projecting effect of little rib structure of vertical arrangement shown in Figure 2 is superior to the beam projecting effect of transversely arranged little rib structure shown in Figure 4.With reference to shown in Figure 5, this transmittance structure 23 can also be for being located at the site 232 on the exit facet 222.Similarly, site 232 can vertically be arranged on exit facet 222, transversely arranged or oblique arrangement, concrete shape and parameter, and those skilled in the art can be provided with according to the power of spot light, the length of light pipe etc.
In various embodiments of the present invention, as shown in Figure 6 except that can using the first solid light pipe 223, can also use the first hollow light pipe 223.When the part light that sends at spot light enters into the hollow parts of this first hollow light pipe 223; This part light can also be refracted to through the medial surface of this first hollow light pipe 223 in the solid material of first light pipe 223, and this first hollow light pipe 223 still can keep the higher efficiency of light energy utilization like this.
In various embodiments of the present invention, the cross sectional shape of first light pipe 223 can be that circle, semicircle, ellipse, polygon or circle lack shape.For example, Fig. 2, Fig. 4 lack shape to the cross section of first light pipe 223 shown in Figure 6 for circle, and the side of such first light pipe 223 can comprise arc surface part and the planar section that adjoins each other.Wherein, arc surface partly forms fully reflecting surface 226, and planar section forms exit facet 222.At this moment, because exit facet 222 is the plane, comparatively easy to be easy when therefore on exit facet 222, making micro-structural 231 or site 232.Perhaps as shown in Figure 7; When being circular in the cross section of first light pipe 223; The side of first light pipe 223 is an arc surface, and fully reflecting surface 226 also is arc surface with exit facet 222 like this, and making micro-structural 231 or site 232 are comparatively complicated loaded down with trivial details on the exit facet that is arc surface 222 at this moment; However, other embodiment of the present invention do not limit this use yet.
Here need to prove, in other embodiments of the invention, can make the side of first light pipe 223 only comprise exit facet 222 (promptly not comprising fully reflecting surface 226).
Second kind of structure; As shown in Figure 8; Said photo-conduction cell 22 comprises wire second light pipe 224 that inside can reflect; Fully reflecting surface 226 is the part side that is coated with total reflection film 225 on second light pipe 224, light total reflection on the inner surface that is coated with total reflection film 225 of second light pipe, 224 inside, and the zone that does not coat total reflection film 225 on the side of second light pipe 224 forms exit facet 222.
Because second light pipe 224 can reflect; Therefore getting into the light of second light pipe 224 from the plane of incidence 221; The light of directive exit facet 222 can directly penetrate from exit facet 222; The light of directive fully reflecting surface 226 can carry out total reflection at the interface place of second light pipe 224 and total reflection film 225, can penetrate from exit facet 222 through the light after the one or many total reflection.
Similar with above-mentioned first kind of structure, in this second kind of structure, second light pipe 224 can be hollow or solid, and the cross sectional shape of this second light pipe 224 can be that circle, semicircle, ellipse, polygon or circle lack shape.
Need to prove that in above-mentioned two kinds of structures, the plane of incidence 221 all is located at an end place (being the left end place among Fig. 2, Fig. 4 to Fig. 6) of Line of light transport element 22.But be not limited thereto, in other embodiments of the invention, the plane of incidence 221 can also be located at the place, two ends of Line of light transport element 22.
As shown in Figure 9; Line source 2 comprises that also the light that inner chamber is ellipsoid converges cover 30 in the present embodiment; White point light source 21 (0) is located at this light and converges cover 30 first along, and the plane of incidence 221 is located at second along that this light converges cover 30, and a part of light that sends from white point light source 21 (0) like this is the directive plane of incidence 221 and enter into photo-conduction cell 22 by the plane of incidence 221 directly; Another part light can directive light converges on the ellipsoid of cover 30 and the directive plane of incidence 221 after the ellipsoid reflection; Finally enter into photo-conduction cell 22, increased the amount of light of the directive plane of incidence 221, improved the efficiency of light energy utilization by the plane of incidence 221.
When using a white point light source 21 (0) can not reach needed light luminance requirement, can arrange in first along that light converges cover 30 two or more white point light sources 21 (0) are set, to improve light luminance.In addition; Can also converge cover 30 first along at light arranges the light source of being made up of red spot light source, green glow spot light and blue light point light sources is set; Can red spot light source, green glow spot light and blue light point light sources be lighted together during use, the light that each spot light is sent mixes back formation white light and gets into photo-conduction cell 22 again.Certainly, this red spot light source, green glow spot light and blue light point light sources also can circulate luminous to realize that the look preface shows in regular turn, and this is with specifying among the embodiment two below.
In actual use; Can each spot light be arranged on light through method well known in the prior art converges on cover 30 first focus; For example can with place, the corresponding summit of first focus support be set what this light converged cover 30; And the height of support is adapted with the distance of first focus to corresponding summit, like this through rack-mount just can the realization of spot light is arranged on first along with spot light.Likewise; Also can the plane of incidence 221 of photo-conduction cell 22 be arranged on second along that light converges cover 30 through method well known in the prior art; For example can with place, the corresponding summit of second focus opening be set what light converged cover 30; Then photo-conduction cell 22 being extend into light from this opening converges the cover 30; When treating the plane of incidence 221 arrival second along of photo-conduction cell 22, light is converged cover 30 fix with the relative position of photo-conduction cell 22, this has just realized the plane of incidence 221 is arranged on second along that light converges cover 30.
In embodiments of the invention one; Can the spot light conversion be formed line source; Can enlarge illumination zone like this, improve illumination uniformity, need not every separated very little one section a spot light promptly is set, can on the basis that guarantees module uniformity of luminance backlight, reduce the use number of spot light.
Embodiment two
Shown in figure 10; Line source described in the present embodiment 2 comprises 21 (2), blue light point light sources 21 (3) of 21 (1), green glow spot lights of a red spot light source and Line of light transport element 22, and photo-conduction cell 22 comprises the plane of incidence 221, exit facet 222 and fully reflecting surface 226.Wherein all contiguous plane of incidence 221 of each spot light 21 (1), 21 (2), 21 (3) is provided with, and the light that each spot light sends gets into photo-conduction cell 22 through the plane of incidence 221; Fully reflecting surface 226 is the total reflection structure, is used to make the light that gets into photo-conduction cell 22 inside through the internal communication of total reflection at photo-conduction cell 22; Exit facet 222 extends along the length direction of photo-conduction cell 22, and makes photo-conduction cell 22 inside arrive the part light outgoing of exit facets 222 through destroying total reflection condition.
In the present embodiment, the structure of said photo-conduction cell 22 is identical with the structure of photo-conduction cell described in the foregoing description one, does not detail here, can be referring to explanation accordingly in the foregoing description one.
To specify below and how to show in the basic enterprising circumstances in which people get things ready for a trip preface that the spot light conversion is formed line source.Show in order to carry out the look preface; Red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) have following three kinds of mounting structures in the present embodiment; But be not limited thereto, in other embodiments of the invention, also can use other mounting structure.
First kind of mounting structure; Referring to shown in Figure 10; With the plane of incidence 221 corresponding positions of a photo-conduction cell 22 a red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) are set; Said red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) are electrically connected with control module, and said control module is used to control red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) and circulates in regular turn and send red light, green light and blue ray.
Circulate in regular turn when sending red light, green light and blue ray in red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3); Each moment has only a kind of point light source light-emitting of color, and liquid crystal panel only shows this corresponding color channel image in this moment simultaneously.When red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) circulate luminous frequency when enough high in regular turn; Persistence of vision phenomenon through human eye can be mixed red-green-blue in time; Thereby form other various colors, so just realized that the look preface shows.
Wherein, the concrete mount fixing structure of red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) can be realized by method commonly used in the prior art, as realizing through structures such as supports.
Second kind of mounting structure; Shown in figure 11; Be provided with the light that an inner chamber is ellipsoid with the plane of incidence 221 corresponding positions of a photo-conduction cell 22 and converge cover 30; The light source of being made up of red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) is (on concrete hardware is realized; Red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) can be integrated on the circuit board) be located at light and converge cover 30 first along; The plane of incidence 221 is located at second along that light converges cover 30; And red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) are electrically connected with control module (for the purpose of clear the demonstration, having omitted said control module among Figure 11), and said control module is used to control red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) and circulates in regular turn and send red light, green light and blue ray.
Similarly; Circulate in regular turn when sending red light, green light and blue ray in red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3); Each moment has only a kind of point light source light-emitting of color, and liquid crystal panel only shows this corresponding color channel image in this moment simultaneously.When red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) circulate luminous frequency when enough high in regular turn; Persistence of vision phenomenon through human eye can be mixed red-green-blue in time; Thereby form other various colors, so just realized that the look preface shows.
The a part of light that sends from red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) is the directive plane of incidence 221 and enter into photo-conduction cell 22 by the plane of incidence 221 directly; Another part light that sends from red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) can converge on the ellipsoid of cover 30 by directive light; And after ellipsoid reflection the directive plane of incidence 221; Finally enter into photo-conduction cell 22 by the plane of incidence 221; Increase the amount of light of the directive plane of incidence 221, improved the efficiency of light energy utilization.
The third mounting structure; Shown in figure 12; Be provided with first ellipsoid 31, second ellipsoid 32 and the 3rd ellipsoid 33 that three inner chambers are ellipsoid with the plane of incidence 221 corresponding positions of a photo-conduction cell 22; Red spot light source 21 (1) is located at first along of first ellipsoid 31, and green glow spot light 21 (2) is located at first along of second ellipsoid 32, and blue light point light sources 21 (3) is located at first along of the 3rd ellipsoid 33; The second focus space position of second focus of second focus of first ellipsoid 31, second ellipsoid 32 and the 3rd ellipsoid 33 overlaps, and the plane of incidence 221 is located at second along of this coincidence.Red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) are electrically connected with control module (for the purpose of clear the demonstration; Omitted said control module among Figure 12), said control module is used to control red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) and circulates in regular turn and send red light, green light and blue ray.
Similarly; Circulate in regular turn when sending red light, green light and blue ray in red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3); Each moment has only a kind of point light source light-emitting of color, and liquid crystal panel only shows this corresponding color channel image in this moment simultaneously.When red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) circulate luminous frequency when enough high in regular turn; Persistence of vision phenomenon through human eye can be mixed red-green-blue in time; Thereby form other various colors, so just realized that the look preface shows.
Particularly in the various structures of present embodiment; Circulate in regular turn when sending red light, green light and blue ray in said red spot light source, green glow spot light and blue light point light sources; Each moment has only a kind of point light source light-emitting of color, and liquid crystal panel only shows this corresponding color channel image in this moment simultaneously.When said red spot light source, green glow spot light and blue light point light sources circulate luminous frequency when enough high in regular turn; Persistence of vision phenomenon through human eye can be mixed red-green-blue in time; Thereby form other various colors, so just realized that the look preface shows.
Show and to realize according to the look preface in the present technological present embodiment.Generally speaking; Three kinds of colors are switched in time colour mixture specification requirement fast in the time of a frame picture; Promptly red (R), green (G), blue (B) three kinds of colors that is to say and will a frame picture be divided into red (R), green (G), blue (B) three sub-frame, and then combine three sub-frame.The refreshing frequency of supposing liquid crystal display systems is 60 hertz, if want to let the switching of the imperceptible R of eyes, G, B three sub-frame, then requires time that each subframe shows less than 5.55 milliseconds (÷ 60 ÷ 3 ≈ 5.55 milliseconds in 1 second).And present stage liquid crystal response time reached 4 milliseconds level, so the response time of liquid crystal molecule can reach the requirement of time colour mixture fully.Simultaneously therefore the response time of light emitting diode can switch the light emitting diode of burn red line, green light and blue ray fast in regular turn less than 1 microsecond, the light emitting diode of these three kinds of light can be circulated in regular turn emit beam.
The a part of light that sends from red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) is the directive plane of incidence 221 and enter into photo-conduction cell 22 by the plane of incidence 221 directly; Another part light that sends from red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) can converge on the ellipsoid of cover 30 by directive light; And after ellipsoid reflection the directive plane of incidence 221; Finally enter into photo-conduction cell 22 by the plane of incidence 221; Increase the amount of light of the directive plane of incidence 221, improved the efficiency of light energy utilization.
Further; Because the light in the photo-conduction cell 22 needs to get into LGP (or diffuser plate) to form uniform surface light source after exit facet 222 penetrates; Red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) circulate when sending red light, green light and blue ray in regular turn like this; Just need red light, green light and blue ray to comprise that with substantially the same incident condition incident angle and incident distance etc. are injected in the LGP, so that these red lights, green light and blue ray penetrate from LGP with substantially the same angle.For reaching this purpose, can make red spot light source 21 (1), green glow spot light 21 (2) and blue light point light sources 21 (3) be symmetrically distributed in the plane of incidence 221 corresponding positions with photo-conduction cell 22 in the space.That is to say for present embodiment,, first focus of first ellipsoid 31, first focus of second ellipsoid 32 and first focus of the 3rd ellipsoid 33 are symmetrically distributed in the space like Figure 13.
Can find out in conjunction with Figure 12 and Figure 13; With first focus of first focus of first focus of first ellipsoid 31, second ellipsoid 32 and the 3rd ellipsoid 33 after the space is symmetrically distributed; Each light converges between line and the plane of incidence of first focus and second focus of cover has certain included angle, and the scope of this angle can be 0～90 °.When this angle was 90 °, the light that each spot light sends the direct directive plane of incidence 221 is the directive plane of incidence 221 vertically; When this angle is greater than 0 during less than 90 °, the light inclination directive plane of incidence 221 of the direct directive plane of incidence 221 that each spot light sends, and when this angle more little, the degree that light tilts is big more, then light is not easy refraction more and enters into photo-conduction cell 22; When this angle is 0; The light normal sheaf plane of incidence 221 of the direct directive plane of incidence that each spot light sends; Light can not directly reflect and entered into photo-conduction cell 22 this moment, entered into photo-conduction cell 22 again after can making the light reflection by the effect of converging that each light converges cover.
In the present embodiment, the color vision effect of utilizing this look preface display packing to produce is identical with the color vision effect that spacing color mixed method produces.And when said red spot light source, green glow spot light and blue light point light sources are circulated when luminous in regular turn; Because a kind of spot light of primary colours only sends a kind of light of primary colours; The pixel cell that therefore need not re-use on the color membrane substrates is selected to see through to these light, has so just omitted the use to pixel cell on the color membrane substrates.
Further; For the situation that spot light sends white light; After this white light being selected to see through through the pixel cell of color membrane substrates; Have only a kind of primary lights of color to transmit from color membrane substrates, the primary colours light of all the other two kinds of colors just has been absorbed, so the utilization rate of luminous energy reduces.And omitted use in the present embodiment to pixel cell on the color membrane substrates, so the light that each basic luminous point light source is sent can both all be utilized basically, the utilization rate of luminous energy has improved.In addition, when the pixel cell on using color membrane substrates comes white light selected to see through, need a pixel cell be divided into three sub-pix unit, a kind of primary lights of color can only be selected to see through in each sub-pix unit.After omitting use in the present embodiment to pixel cell on the color membrane substrates, with this pixel cell zone of the same area in, can see through the primary lights of three kinds of colors at times simultaneously, therefore improve the spatial resolution of color.
In addition, embodiments of the invention also provide a kind of liquid crystal indicator, and said liquid crystal indicator comprises above-mentioned line source, and LGP and liquid crystal panel, and the exit facet of wherein said line source is towards the incidence surface setting of said LGP.
Need to prove and since in the present embodiment among the employed technical characterictic of line source and above-mentioned each embodiment the employed technical characterictic of line source identical, so can solve identical technical problem, reach identical Expected Results.Therefore, no longer said liquid crystal indicator is detailed, relevant content can be referring to the description among above-mentioned each embodiment here.
But here it is to be noted; When said line source comprises red spot light source, green glow spot light and blue light point light sources; And be electrically connected with control module in said red spot light source, green glow spot light and blue light point light sources; Said control module is controlled said red spot light source, green glow spot light and blue light point light sources and is circulated in regular turn when sending red light, green light and blue ray, and said liquid crystal panel comprises array structure and black matrix, and color membrane structure is not set in the said liquid crystal indicator.
This moment, said liquid crystal panel can comprise first substrate and second substrate, and with said array structure and black arranged in matrix on said first substrate.
Perhaps; When said line source comprises red spot light source, green glow spot light and blue light point light sources; And be electrically connected with control module in said red spot light source, green glow spot light and blue light point light sources; When said control module was controlled said red spot light source, green glow spot light and blue light point light sources and sent red light, green light and blue ray simultaneously, said liquid crystal panel comprised array structure, black matrix and color membrane structure.
In existing common application, the white light-emitting diodes that is used as the white point light source adopts blue-light excited yellow fluorescent powder to produce white light, and this makes that the composition of ruddiness is less, is easy to generate colour cast.In the present embodiment.Make said red spot light source (red diodes), green glow spot light (green diode) and blue light point light sources (blue light diode) simultaneously luminous; Can make red light, green light and blue ray in the inner colour mixture of said light pipe; And can be through selecting in these three kinds of colors the ratio of each coloured light in the luminous intensity adjustment white light separately; Reduce to produce colour cast, and if some spot lights be damaged, can also replace.
The above; Be merely the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by said protection domain with claim.
Claims (12)
1. a line source is characterized in that, comprises at least one spot light and Line of light transport element,
Said photo-conduction cell comprises the plane of incidence, exit facet and fully reflecting surface;
The contiguous said plane of incidence setting of said spot light, the light that said spot light sends gets into said photo-conduction cell through the said plane of incidence;
Said fully reflecting surface is the total reflection structure, is used to make get into the inner light of said photo-conduction cell through the internal communication of total reflection at said photo-conduction cell;
Said exit facet extends along the length direction of said photo-conduction cell, and makes said photo-conduction cell inside arrive the part light outgoing of said exit facet through destroying total reflection condition.
2. line source according to claim 1 is characterized in that,
Said photo-conduction cell comprises wire first light pipe that can carry out total reflection, and the side of said first light pipe comprises said fully reflecting surface and the said exit facet that adjoins each other, and said exit facet is provided with the transmittance structure that destroys total reflection condition.
3. line source according to claim 2 is characterized in that, said transmittance structure comprises micro-structural or the site that is located on the said exit facet.
4. line source according to claim 1 is characterized in that,
Said photo-conduction cell comprises that inside can carry out wire second light pipe of anaclasis; Said fully reflecting surface is the part side that said second light pipe is coated with total reflection film; The inner light of second light pipe is being coated with total reflection on the inner surface of total reflection film, and the zone that does not coat said total reflection film on the said side forms said exit facet.
5. line source according to claim 1 is characterized in that, the said plane of incidence is located at an end place or the place, two ends of said Line of light transport element.
6. line source according to claim 1; It is characterized in that; Said line source comprises that also the light that inner chamber is ellipsoid converges cover, and said spot light is located at first along that said light converges cover, and the plane of incidence of said photo-conduction cell is located at second along that said light converges cover.
7. line source according to claim 1; It is characterized in that; Said line source comprises that also light converges cover, and said light converges the inner chamber of cover to be made up of first ellipsoid, second ellipsoid and the 3rd ellipsoid that three focuses overlap, and the red spot light source is located at first along of said first ellipsoid; The green glow spot light is located at first along of said second ellipsoid; Blue light point light sources is located at first along of said the 3rd ellipsoid, and the second focus space position of second focus of said first ellipsoid, second focus of said second ellipsoid and said the 3rd ellipsoid overlaps, and the plane of incidence of said photo-conduction cell is located at second along of this coincidence.
8. line source according to claim 7; It is characterized in that; First focus of first focus of said first ellipsoid, first focus of said second ellipsoid and said the 3rd ellipsoid is symmetrically distributed in the space, so that said red light, green light and blue ray are injected said photo-conduction cell with substantially the same incident angle and incident distance by the said plane of incidence.
9. a liquid crystal indicator is characterized in that, comprises that the exit facet of said line source is towards the incidence surface setting of said LGP like each described line source of claim 1 to 8, LGP and liquid crystal panel.
10. liquid crystal indicator according to claim 9; It is characterized in that; Said line source comprises red spot light source, green glow spot light and blue light point light sources; Be electrically connected with control module in said red spot light source, green glow spot light and blue light point light sources; And said control module is controlled said red spot light source, green glow spot light and blue light point light sources and is circulated in regular turn when sending red light, green light and blue ray, and said liquid crystal panel comprises array structure and black matrix, and color membrane structure is not set in the said liquid crystal indicator.
11. liquid crystal indicator according to claim 10 is characterized in that, said liquid crystal panel comprises first substrate and second substrate, and said array structure and black arranged in matrix are on said first substrate.
12. liquid crystal indicator according to claim 9; It is characterized in that; Said line source comprises red spot light source, green glow spot light and blue light point light sources; Be electrically connected with control module in said red spot light source, green glow spot light and blue light point light sources, and said control module is when controlling said red spot light source, green glow spot light and blue light point light sources and sending red light, green light and blue ray simultaneously, said liquid crystal panel comprises array structure, black matrix and color membrane structure.
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| CN201010531996.0A CN102466168B (en) | 2010-10-29 | 2010-10-29 | Line light source and LCD (liquid crystal display) device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010531996.0A CN102466168B (en) | 2010-10-29 | 2010-10-29 | Line light source and LCD (liquid crystal display) device |
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| CN102466168A true CN102466168A (en) | 2012-05-23 |
| CN102466168B CN102466168B (en) | 2014-02-19 |
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| Publication number | Publication date |
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| CN102466168B (en) | 2014-02-19 |
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