CN102588845B - Back lighting device and liquid crystal display device - Google Patents
Back lighting device and liquid crystal display device Download PDFInfo
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- CN102588845B CN102588845B CN201210058173.XA CN201210058173A CN102588845B CN 102588845 B CN102588845 B CN 102588845B CN 201210058173 A CN201210058173 A CN 201210058173A CN 102588845 B CN102588845 B CN 102588845B
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Abstract
The invention discloses a back lighting device, which comprises a point light source, a rectangular light guide strip and a tabular light guide film. The light guide strip comprises a first light entering surface and a first light exiting surface, linearly polarized light enters from the first light entering surface, and linearly polarized parallel light exits through the first light exiting surface. The light guide film comprises a second light entering surface and a second light exiting surface, the linearly polarized parallel light enters from the second light entering surface and exits through the second light exiting surface. The invention further discloses a liquid crystal display device. The back lighting device is high in light energy utilization rate, light guide uniformity is improved, and the obtained liquid crystal display device is light and thin.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator that uses the backlighting arrangement of straight line polarization pointolite and apply this backlighting arrangement.
Background technology
Along with the fast development of liquid crystal display (LCD), its in flat pannel display field in occupation of consequence further.
Because liquid crystal itself is not luminous, LCD needs backlight module that illumination is provided, be that the light that sends of light source (LED, cold-cathode tube CCFL etc.) is through light guiding film, diffusion sheet, brightness enhancement film etc., be extended to uniform area source by pointolite or line source, then incide liquid crystal layer through polarizing coating, colored filter.But such backlight module, the utilization ratio of luminous energy is often very low, only 5% left and right.Wherein light is losing the energy that exceedes 50% by polarizing coating.
The optical energy loss that is converted to polarized light for reducing natural light, can utilize polarisation conversion film (P-S converter) to replace polarizing coating.The effect of polarisation conversion film is to allow the light of a certain polarization direction (polarization film polarization direction) to pass through, the polarization by reflection direction light vertical with this direction simultaneously.The light being reflected again incides polarisation conversion film after without polarization, so repeatedly, can effectively improve the efficiency of light energy utilization.But the method also needs to utilize achromatic quarter wave plate to realize the conversion of polarization state conventionally, and too many optical thin film is unfavorable for that LCD's is lightening.
Therefore manage leaded light and polarization function to be integrated on same optical thin film, both can improve the efficiency of light energy utilization of backlight module, do not increase again the quantity of film, there is important Research Significance.
Summary of the invention
In view of this, the present invention proposes a kind of backlighting arrangement and apply the liquid crystal indicator of this backlighting arrangement.The efficiency of light energy utilization of this backlighting arrangement is high, and the liquid crystal indicator obtaining is frivolous.
To achieve these goals, the technical scheme that the embodiment of the present application provides is as follows:
A kind of backlighting arrangement, especially, comprising:
Pointolite, penetrates the linearly polarized light collimating;
Rectangular-shaped light-strip, comprises the first incidence surface and the first exiting surface, and described linearly polarized light is injected and passes through the first exiting surface and penetrate linear polarization directional light from the first incidence surface,
Described light-strip also comprises the first optical element, and this first optical element is accepted the linearly polarized light of propagating in described light-strip, and its at least a portion is penetrated towards the direction substantially vertical with described the first exiting surface;
Flat light-leading film, comprises the second incidence surface and the second exiting surface, and described linear polarization directional light is injected and passes through the second exiting surface and penetrate linear polarization directional light from the second incidence surface,
Described light-leading film also comprises the second optical element, and this second optical element is accepted the linear polarization directional light of propagating in described light-leading film, and its at least a portion is penetrated towards the direction substantially vertical with described the second exiting surface.
Preferably, in above-mentioned backlighting arrangement, described pointolite is LASER Light Source.
Preferably, in above-mentioned backlighting arrangement, described LASER Light Source at least can penetrate red laser, green laser and blue laser.
Preferably, in above-mentioned backlighting arrangement, described the first optical element is grating group A; Described grating group A, along the direction of propagation of described linearly polarized light in described light-strip, is intermittently configured with the spacing of setting; Each grating in described grating group A makes respectively at least a portion diffraction of described linearly polarized light, and penetrates to the direction substantially vertical with described the first exiting surface.
Preferably, in above-mentioned backlighting arrangement, each grating in described grating group A, extend along the direction substantially vertical with the first exiting surface respectively, the direction of propagation of the light extraction efficiency of described grating from the first incidence surface along described linearly polarized light increases gradually, to make the brightness of the light penetrating from the first exiting surface even.
Preferably, in above-mentioned backlighting arrangement, described the second optical element is grating group B; Described grating group B, along the direction of propagation of described linear polarization directional light in described light-leading film, is intermittently configured with the spacing of setting; Each grating in described grating group B makes respectively at least a portion diffraction of described linear polarization directional light, and penetrates to the direction substantially vertical with described the second exiting surface.
Preferably, in above-mentioned backlighting arrangement, each grating in described grating group B, extend along the direction substantially vertical with the second exiting surface respectively, the light extraction efficiency of described grating increases along the direction of propagation of described linear polarization directional light gradually from the second incidence surface, to make the brightness of the light penetrating from the second exiting surface even.
Preferably, in above-mentioned backlighting arrangement, described light-strip also comprises the first leaded light substrate, and described the first leaded light substrate is the transparent light guide substrate without optical activity.
Preferably, in above-mentioned backlighting arrangement, described light-leading film also comprises the second leaded light substrate, and described the second leaded light substrate is the transparent light guide substrate without optical activity.
The invention also discloses a kind of liquid crystal indicator, especially, comprise display panels and above-mentioned backlighting arrangement, described backlighting arrangement is located at the back side of described display panels so that it is thrown light on.
Compared with prior art, beneficial effect of the present invention is:
1, improved the optical energy utilization efficiency of LCD backlight module.Line of collimation polarization pointolite still has polarization characteristic after light-strip and light-leading film expand to uniform area source, thereby has cancelled the use of polarization film in LCD backlight module.
2, improved leaded light homogeneity.In invention, first line of collimation pointolite is extended to uniform line light source through light-strip, uniform line light source is extended to uniform area light source through light-leading film, be that collimating point light source becomes uniform area light source through two steps, and each step expansion all only needs to consider the homogeneity of a dimension, thereby effectively simplify the design of light-strip and light-leading film outgoing efficiency, improved leaded light homogeneity.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1 shows that the schematic perspective view of backlighting arrangement in the specific embodiment of the invention;
Figure 2 shows that the side schematic view of backlighting arrangement in Fig. 1;
Figure 3 shows that the vertical view of backlighting arrangement in Fig. 1;
Fig. 4 a is depicted as the schematic diagram that in the specific embodiment of the invention, p ripple is propagated in light-strip or light-leading film;
Fig. 4 b is depicted as the schematic diagram that in the specific embodiment of the invention, s ripple is propagated in light-strip or light-leading film;
Fig. 4 c is depicted as the grating vector schematic diagram of the grating on light-strip in the specific embodiment of the invention or light-leading film;
Fig. 5 a is depicted as light-strip in the specific embodiment of the invention or light-leading film and is divided into the schematic diagram of pixel cell;
Fig. 5 b is depicted as the structural representation of grating in the specific embodiment of the invention.
Embodiment
Object of the present invention based on: how to make pointolite converting in area source process, final emergent light is retention wire polarization state still; How to make area source there is good uniformity coefficient, i.e. the design of light-strip and light-leading film outgoing efficiency.
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all should belong to the scope of the application's protection.
The embodiment of the invention discloses a kind of backlighting arrangement, comprising: pointolite, penetrates the linearly polarized light collimating; Rectangular-shaped light-strip, comprise the first incidence surface and the first exiting surface, described linearly polarized light is injected and passes through the first exiting surface and penetrate linear polarization directional light from the first incidence surface, described light-strip also comprises the first optical element, this first optical element is accepted the linearly polarized light of propagating in described light-strip, and its at least a portion is penetrated towards the direction substantially vertical with described the first exiting surface; Flat light-leading film, comprise the second incidence surface and the second exiting surface, described linear polarization directional light is injected and passes through the second exiting surface and penetrate linear polarization directional light from the second incidence surface, described light-leading film also comprises the second optical element, this second optical element is accepted the linear polarization directional light of propagating in described light-leading film, and its at least a portion is penetrated towards the direction substantially vertical with described the second exiting surface.
The object of light-strip is line of collimation polarization pointolite to be extended to polarized line light source, and light-leading film is further extended to plane of polarization light source by this polarized line light source.For fear of or reduce the energy that loses of light when by polarization film, the linear polarization that need to remain on light in whole process does not change, so the first optical element and the second optical element are provided in the embodiment of the present invention.
Preferably, pointolite is LASER Light Source.Described LASER Light Source at least can penetrate red laser, green laser and blue laser.LASER Light Source is the light source with fine directivity and polarizability, can penetrate the linearly polarized light of collimation.
Pointolite can also be the light source that itself does not have fine directivity and polarizability, for example LED, but through collimation, a pointolite that becomes collimation polarization to the rear.
Pointolite is positioned over suitable position, makes the linearly polarized light of collimation be coupled into light-strip with certain angle, polarization state, to ensure the linear polarization state of emergent light in being extended to line source by pointolite and being extended to area source process by line source.
Preferably, the first optical element is grating group A; Described grating group A, along the direction of propagation of described linearly polarized light in described light-strip, is intermittently configured with the spacing of setting; Each grating in described grating group A makes respectively at least a portion diffraction of described linearly polarized light, and penetrates to the direction substantially vertical with described the first exiting surface.Each grating in described grating group A, extend along the direction substantially vertical with the first exiting surface respectively, the direction of propagation of the light extraction efficiency of described grating from the first incidence surface along described linearly polarized light increases gradually, to make the brightness of the light penetrating from the first exiting surface even.
Preferably, the second optical element is grating group B; Described grating group B, along the direction of propagation of described linear polarization directional light in described light-leading film, is intermittently configured with the spacing of setting; Each grating in described grating group B makes respectively at least a portion diffraction of described linear polarization directional light, and penetrates to the direction substantially vertical with described the second exiting surface.Each grating in described grating group B, extend along the direction substantially vertical with the second exiting surface respectively, the light extraction efficiency of described grating increases along the direction of propagation of described linear polarization directional light gradually from the second incidence surface, to make the brightness of the light penetrating from the second exiting surface even.
Light extraction efficiency=Area Ratio * diffraction efficiency, it can be realized by controlling diffraction efficiency, also can recently obtain the light extraction efficiency of wanting by control area.
The first optical element and the second optical element are optical grating construction, and its grating orientation should be able to ensure being extended to by pointolite in line source process, emergent light retention wire polarization state; Its cycle size to fit, makes emergent light near light-strip exit surface vertical direction; Meet the inhomogeneity requirement of leaded light by the size in the shared region of optical grating construction, the degree of depth of grating, the outgoing efficiency that dutycycle determines.
The first optical element and the second optical element can also be half-transmitting mirror.
In above-mentioned backlighting arrangement, described light-strip also comprises the first leaded light substrate, and described the first leaded light substrate is the transparent light guide substrate without optical activity.Described light-leading film also comprises the second leaded light substrate, and described the second leaded light substrate is the transparent light guide substrate without optical activity.
The first leaded light substrate and the second leaded light substrate are the transparent light guide substrate without optical activity, do not change all the time with the linear polarization that ensures light in the communication process of light.
The embodiment of the invention also discloses a kind of liquid crystal indicator, comprise display panels and above-mentioned backlighting arrangement, described backlighting arrangement is located at the back side of described display panels so that it is thrown light on.
Owing to having omitted polaroid, liquid crystal indicator is more frivolous.
In order to further illustrate technical scheme of the present invention, below in conjunction with accompanying drawing, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
Shown in ginseng Fig. 1, backlighting arrangement comprises pointolite 1, rectangular-shaped light-strip 2 and flat light-leading film 3.
Pointolite 1 is LASER Light Source, for red (632.8nm), green (532nm), blue (441.6nm) three chromatic polarization collimation lasers, can penetrate red laser, green laser and blue laser.
Shown in ginseng Fig. 3, light-strip 2 comprises that the first leaded light substrate 21 and the first optical element 22, the first optical elements 22 are formed at the upper surface of the first leaded light substrate 21.
The first leaded light substrate 21 is the transparent light guide substrate without optical activity, preferably uses resin material transparent, excellent optical characteristics, particularly preferably little acryl resin and the polyalkenes resin of birefringence.
The first leaded light substrate 21 comprises that the first incidence surface 211 and the first exiting surface 212, the first incidence surfaces 211 are positioned at the end of light-strip 2, perpendicular with the first exiting surface 212.The linearly polarized light that pointolite 1 penetrates can be injected from the first incidence surface 211 with certain angle, and penetrates from the first exiting surface 212.
The first optical element 22 is grating, and multiple described gratings, along the direction of propagation (turning left from the right side in Fig. 3) of the first leaded light substrate 21 interior linearly polarized lights, are intermittently configured with the spacing of setting; Each of described grating, makes respectively at least a portion diffraction of described linearly polarized light, and penetrates to the direction substantially vertical with described the first exiting surface 212.Each of described grating, extend along the direction substantially vertical with the first exiting surface 212 respectively, the light extraction efficiency of described grating increases along the direction of propagation of described linearly polarized light gradually from the first incidence surface 211, to make the brightness of the light penetrating from the first exiting surface 212 even.
Shown in ginseng Fig. 2, light-leading film 3 comprises that the second leaded light substrate 31 and the second optical element 32, the second optical elements 32 are formed at the upper surface of the second leaded light substrate 31.
The second leaded light substrate 31 is the transparent light guide substrate without optical activity, preferably uses resin material transparent, excellent optical characteristics, particularly preferably little acryl resin and the polyalkenes resin of birefringence.
The second leaded light substrate 31 comprises that the second incidence surface 311 and the second exiting surface 312, the second incidence surfaces 311 are positioned at the end of light-leading film 3, perpendicular with the second exiting surface 312.Linear polarization directional light from light-strip 2 can be injected from the second incidence surface 311 with certain angle, and penetrates from the second exiting surface 312.
The second optical element 32 is grating, and multiple described gratings, along the direction of propagation of the second leaded light substrate 31 interior lines polarization parallel light (in Fig. 2 from left to right), are intermittently configured with the spacing of setting; Each of described grating, makes respectively at least a portion diffraction of described linear polarization directional light, and penetrates to the direction substantially vertical with described the second exiting surface 312.Each of described grating, extend along the direction substantially vertical with the second exiting surface 312 respectively, the light extraction efficiency of described grating increases along the direction of propagation of described linear polarization directional light gradually from the second incidence surface 311, to make the brightness of the light penetrating from the second exiting surface 312 even.
Describe for the principle of backlighting arrangement in above-mentioned specific embodiment below.
The maintenance of polarizability: pointolite is extended to line source and is extended in area source process by line source, linearly polarized light has experienced following physical process: linearly polarized light is in the upper and lower surface generation total reflection of the first leaded light substrate 21 of light-strip 2, and by the first optical element 22 diffraction, linearly polarized light enters light-leading film 3 from light-strip 2 out, then in the upper and lower surface generation total reflection of the second leaded light substrate 31 of light-leading film 3, and by the second optical element 32 diffraction.
Angle (the α of light incident light-strip 2 and light-leading film 3
1, α
2) be coupled into the angle (θ in transparent substrates (21,31) with light
1, θ
2) meet refraction law, and there is total reflection in light, should meet total reflection condition in transparent substrates.In addition, should be near its exit surface vertical direction from the light of light-strip 2 and light-leading film 3 outgoing.Therefore, the cycle of light-strip 2 and light-leading film 3 surface gratings can, according to above analysis, be determined by grating equation.Consider that pointolite is in the time being extended to line source and line source and being extended to area source, should keep the linear polarization state of emergent light, therefore light should be with certain polarization state incident light-strip 2 and light-leading film 3, taking ensure light when transparent substrates (21,31) the upper and lower surface generation total reflection as p ripple or s ripple, the grating vector of substrate surface optical grating construction (22,32) should be in the plane of incidence of light simultaneously.
For total reflection, because the bit phase delay amount of p ripple and s ripple is different, linearly polarized light conventionally becomes elliptically polarized light or circularly polarized light after total reflection, and only in the time that incident light is p ripple or s ripple, reflection luminous energy keeps original polarization state constant.Therefore the linearly polarized light that, pointolite 1 sends should be coupled into light-strip with specific incident angle, polarization direction.
Ginseng Fig. 4 a, light is in the first leaded light substrate 21 or the interior generation total reflection of the second leaded light substrate 31, and in the time that incident light is p ripple, total reflection does not change polarisation of light state, and reflected light is still p ripple.
Ginseng Fig. 4 b, light is in the first leaded light substrate 21 or the interior generation total reflection of the second leaded light substrate 31, and in the time that incident light is s ripple, total reflection does not change polarisation of light state, and reflected light is still s ripple.
Destroy total reflection condition at diffraction grating, light, from light-strip and light-leading film surface outgoing process, should make grating vector (being grating fringe vertical incidence face) in the plane of incidence, and the linear polarization state of guarantee light is constant.
Ginseng Fig. 4 c, for ensureing the linear polarization state of emergent light, the grating vector of the first optical element 22 and the second optical element 32 is in plane of light incidence, and wherein, grating vector is at x direction of principal axis, and incident ray is in xz face.
The design of outgoing efficiency: along with the increase from light source distance, the luminous energy in light-strip 2 and light-leading film 3 reduces, for obtaining uniform line source and area source, needs to increase outgoing efficiency.For this reason, light-strip 2 and light-leading film 3 can be divided into several enough little pixel cells, the area of each pixel cell is S
p, in pixel cell, having area is S
gregion on there is optical grating construction, as shown in Figure 5 a.If grating diffration efficiency is e
g, the light extraction efficiency at a certain pixel cell place is η=S
ge
g/ S
p.And grating diffration efficiency is relevant with the factor such as material, dutycycle f, degree of depth h of grating, as Fig. 5 b.Therefore, can calculate according to inhomogeneity requirement the outgoing efficiency of each pixel, obtain by the area of change grating region, material, dutycycle and the degree of depth of grating the outgoing efficiency needing.
In sum, beneficial effect of the present invention is:
1, improved the optical energy utilization efficiency of LCD backlight module.Line of collimation polarization pointolite still has polarization characteristic after light-strip and light-leading film expand to uniform area source, thereby has cancelled the use of polarization film in LCD backlight module.In prior art, polarization film can filter the luminous energy that exceedes 50%, and therefore invention has effectively improved the efficiency of light energy utilization.
2, improved leaded light homogeneity.In invention, first line of collimation pointolite is extended to uniform line light source (linear polarization directional light) through light-strip, uniform line light source is extended to uniform area light source through light-leading film, be that collimating point light source becomes uniform area light source through two steps, and each step expansion all only needs to consider the homogeneity of a dimension, thereby effectively simplify the design of light-strip and light-leading film outgoing efficiency, improved leaded light homogeneity.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not depart from the spirit and scope of technical solution of the present invention.
Claims (8)
1. a backlighting arrangement, is characterized in that, comprising:
Pointolite, penetrates the linearly polarized light collimating;
Rectangular-shaped light-strip, comprises the first incidence surface and the first exiting surface, and described linearly polarized light is injected and passes through the first exiting surface and penetrate linear polarization directional light from the first incidence surface,
Described light-strip also comprises the first optical element, and this first optical element is accepted the linearly polarized light of propagating in described light-strip, and its at least a portion is penetrated towards the direction substantially vertical with described the first exiting surface,
Described the first optical element is grating group A; Described grating group A, along the direction of propagation of described linearly polarized light in described light-strip, is intermittently configured with the spacing of setting; Each grating in described grating group A makes respectively at least a portion diffraction of described linearly polarized light, and penetrates to the direction substantially vertical with described the first exiting surface;
Flat light-leading film, comprises the second incidence surface and the second exiting surface, and described linear polarization directional light is injected and passes through the second exiting surface and penetrate linear polarization directional light from the second incidence surface,
Described light-leading film also comprises the second optical element, and this second optical element is accepted the linear polarization directional light of propagating in described light-leading film, and its at least a portion is penetrated towards the direction substantially vertical with described the second exiting surface,
Described the second optical element is grating group B; Described grating group B, along the direction of propagation of described linear polarization directional light in described light-leading film, is intermittently configured with the spacing of setting; Each grating in described grating group B makes respectively at least a portion diffraction of described linear polarization directional light, and penetrates to the direction substantially vertical with described the second exiting surface.
2. backlighting arrangement according to claim 1, is characterized in that: described pointolite is LASER Light Source.
3. backlighting arrangement according to claim 2, is characterized in that: described LASER Light Source at least can penetrate red laser, green laser and blue laser.
4. backlighting arrangement according to claim 1, it is characterized in that: each grating in described grating group A, extend along the direction substantially vertical with the first exiting surface respectively, the direction of propagation of described light extraction efficiency from the first incidence surface along described linearly polarized light increases gradually, to make the brightness of the light penetrating from the first exiting surface even.
5. backlighting arrangement according to claim 1, it is characterized in that: each grating in described grating group B, extend along the direction substantially vertical with the second exiting surface respectively, the light extraction efficiency of described grating increases along the direction of propagation of described linear polarization directional light gradually from the second incidence surface, to make the brightness of the light penetrating from the second exiting surface even.
6. backlighting arrangement according to claim 1, is characterized in that: described light-strip also comprises the first leaded light substrate, and described the first leaded light substrate is the transparent light guide substrate without optical activity.
7. backlighting arrangement according to claim 1, is characterized in that: described light-leading film also comprises the second leaded light substrate, and described the second leaded light substrate is the transparent light guide substrate without optical activity.
8. a liquid crystal indicator, is characterized in that, comprises display panels and backlighting arrangement claimed in claim 1, and described backlighting arrangement is located at the back side of described display panels so that it is thrown light on.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2991923C (en) * | 2015-09-05 | 2022-11-01 | Leia Inc. | Dual-direction collimator |
| KR102440140B1 (en) | 2015-12-30 | 2022-09-06 | 엘지디스플레이 주식회사 | Viewing Angle Switchable Back Light Unit |
| CN105717705A (en) * | 2016-04-26 | 2016-06-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| KR20190025554A (en) | 2016-07-26 | 2019-03-11 | 레이아 인코포레이티드 | Bar collimator, backlight system and method |
| CN106842397B (en) * | 2017-01-05 | 2020-07-17 | 苏州苏大维格光电科技股份有限公司 | Resin holographic waveguide lens, preparation method thereof and three-dimensional display device |
| CN106647042B (en) * | 2017-03-17 | 2018-11-06 | 京东方科技集团股份有限公司 | A kind of light source device and display device |
| CN108227068A (en) * | 2018-01-05 | 2018-06-29 | 京东方科技集团股份有限公司 | Side entrance back module and display device |
| CN108646466A (en) * | 2018-06-29 | 2018-10-12 | 深圳创维新世界科技有限公司 | Backlight module, LCD display and virtual reality show the helmet |
| JP7235850B2 (en) | 2018-08-13 | 2023-03-08 | レイア、インコーポレイテッド | Grating collimator, backlight system and method using light recycling light source |
| CN110187536B (en) * | 2019-05-28 | 2021-11-30 | 京东方科技集团股份有限公司 | Display panel, display device and control method thereof |
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| CN101666462A (en) * | 2008-09-03 | 2010-03-10 | 先进开发光电股份有限公司 | Edge-lighting backlight module and light guide element and linear light source thereof |
| CN101699152A (en) * | 2009-11-16 | 2010-04-28 | 上海交通大学 | Two-dimensional metallic photonic crystal-based light guide plate with polarization function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666462A (en) * | 2008-09-03 | 2010-03-10 | 先进开发光电股份有限公司 | Edge-lighting backlight module and light guide element and linear light source thereof |
| CN101699152A (en) * | 2009-11-16 | 2010-04-28 | 上海交通大学 | Two-dimensional metallic photonic crystal-based light guide plate with polarization function |
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