CN104345376A - Light guide plate and backlight module with use of light guide plate - Google Patents
Light guide plate and backlight module with use of light guide plate Download PDFInfo
- Publication number
- CN104345376A CN104345376A CN201310318132.4A CN201310318132A CN104345376A CN 104345376 A CN104345376 A CN 104345376A CN 201310318132 A CN201310318132 A CN 201310318132A CN 104345376 A CN104345376 A CN 104345376A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- lenticule
- scattering unit
- light
- 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.)
- Pending
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/003—Lens or lenticular sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
Abstract
The invention provides a light guide plate which comprises a light in surface, a light out surface adjacent to the light in surface and a bottom surface opposite to the light out surface. The light in surface is provided with a micro lens for scattering light and comprises a plurality of scattering units in continuous arrangement. A V-shaped groove is formed by two adjacent scattering units. Along the direction to two sides of the micro lens along the center of the micro lens, the opening sizes of a plurality of V-shaped grooves formed by the plurality of continuous scattering units of the micro lens are changed gradually. According to the light guide plate, in the direction to two sides of the micro lens along the center of the micro lens, the opening sizes of a plurality of grooves formed by the plurality of continuous scattering units of the micro lens are changed gradually, light emitted into the micro lens is refracted into the micro lens and is scattered toward different directions of the light guide plate, the coupling efficiency of an LED light source and the light guide plate is improved, and the uniform light field distribution is formed in the light guide plate at the same time. The invention also provides a backlight module with the use of the light guide plate.
Description
Technical field
The present invention relates to field of liquid crystal display, particularly relate to a kind of light guide plate and use the backlight module of this light guide plate.
Background technology
Light emitting diode (light emitting diode, LED) as a kind of light emitting source efficiently, have the various features such as environmental protection, power saving, life-span length and applied to various field widely, particularly in display imaging field, light emitting diode is commonly used for the backlight of backlight module.
In side entrance back module (side-type backlight module), LED light source is arranged at the side of light guide plate usually, the light that LED light source sends is coupled into light guide plate from the incidence surface of light guide plate, light by after the reflector net point scattering of bottom surface of light guide plate from the outgoing of light guide plate end face, light is more successively by having the diffusion sheet of equal light action and having the prismatic lens of light harvesting effect, and the area source finally converting high brightness to is shown on display screen.
But, outgoing light field due to LED light source is the distribution of lambert's type, light distribution is uneven, the light intensity light intensity that is comparatively strong, light field edge of light field center is more weak, and the incidence surface of light guide plate is generally plane, when LED light source and light guide plate carry out coupling light, easily produce the coupling efficiency of light low and be coupled into the uneven problem of light field that the light in light guide plate formed.
Summary of the invention
In view of this, be necessary that providing a kind of can promote light coupling efficiency and improve the light guide plate of optical field distribution and use the backlight module of this light guide plate.
A kind of light guide plate, this light guide plate comprises incidence surface, the exiting surface adjacent with this incidence surface and the bottom surface relative with this exiting surface, described incidence surface has the lenticule for scattered beam, this lenticule comprises the scattering unit of some continuous arrangements, v-depression is formed between adjacent two scattering units, along these lenticular central authorities towards on the direction of these lenticule both sides, the opening size of multiple v-depressions that this lenticular multiple continuous scattering unit is formed is gradual change.
A kind of backlight module, comprise a light guide plate and at least one LED light source being arranged at this light guide plate side, this light guide plate comprises incidence surface, the exiting surface adjacent with this incidence surface and the bottom surface relative with this exiting surface, described incidence surface has the lenticule for scattered beam, this lenticule comprises the scattering unit of some continuous arrangements, v-depression is formed between adjacent two scattering units, along these lenticular central authorities towards on the direction of these lenticule both sides, the opening size of multiple v-depressions that this lenticular multiple continuous scattering unit is formed is gradual change, this at least one LED light source is arranged towards the lenticule on described light guide plate incidence surface.
A kind of light guide plate, this light guide plate comprises incidence surface, the exiting surface adjacent with this incidence surface and the bottom surface relative with this exiting surface, described incidence surface has the lenticule for scattered beam, this lenticule comprises the scattering unit of some continuous arrangements, groove is formed between adjacent two scattering units, the openings of sizes of each groove increases towards the direction away from light guide plate from the incidence surface of this light guide plate, along these lenticular central authorities towards on the direction of these lenticule both sides, the opening angle of multiple grooves that this lenticular multiple continuous scattering unit is formed is gradual change.
In the present invention, this lenticule comprises some continuous print scattering units, groove is formed between adjacent scattering unit, along lenticular central authorities towards on the direction of lenticule both sides, the opening size gradual change of multiple grooves that this lenticular continuous scattering unit is formed, be incident to this lenticular light through superrefraction laggard enter this lenticule towards the different directions scattering of light guide plate, not only promote the coupling efficiency of this LED light source and light guide plate, also form uniform optical field distribution in light guide plate inside simultaneously.
With reference to the accompanying drawings, the invention will be further described in conjunction with the embodiments.
Accompanying drawing explanation
Fig. 1 is the perspective view of the backlight module of first embodiment of the invention.
Fig. 2 is the transverse sectional view along the backlight module in Fig. 1 along II-II line.
Fig. 3 is the schematic diagram propagated in a light lenticular scattering unit in FIG.
Fig. 4 is the structural representation of the backlight module of second embodiment of the invention.
Fig. 5 is the structural representation of the backlight module of third embodiment of the invention.
Main element symbol description
| Backlight module | 1、1a、1b |
| Light guide plate | 2、2a、2b |
| Lenticule | 3、3a、3b |
| LED light source | 4、4a、4b |
| Incidence surface | 20、20a、20b |
| Exiting surface | 21、21a、21b |
| Bottom surface | 22 |
| Scattering unit | 30、30a、30b |
| Groove | 31、31a、31b |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1 to Fig. 2, the backlight module 1 of first embodiment of the invention comprises a light guide plate 2 and and is arranged at the LED light source 4 of this light guide plate 2 side.This light guide plate 2 also arranges lenticule 3 on a side of LED light source 4, the light that this lenticule 3 sends for scattering LED light source 4.
This light guide plate 2 comprises an incidence surface 20, the exiting surface 21 adjacent with this incidence surface 20 and the bottom surface 22 relative with this exiting surface 21.This lenticule 3 is arranged on the incidence surface 20 of this light guide plate 2.In the present embodiment, this incidence surface 20 is mutually vertical with exiting surface 21.This exiting surface 21 is parallel to each other with bottom surface 22.
This lenticule 3 comprises some continuous print scattering units 30.The groove 31 of V-arrangement is formed between adjacent scattering unit 30.This lenticule 3 is serrate lens.This scattering unit 30 is triangular prism.This scattering unit 30 is triangle along the xsect of the exiting surface 21 being parallel to light guide plate 2.Adjacent scattering unit 30 is not identical along the cross-sectional area of the exiting surface 21 being parallel to light guide plate 2.The opening size of this v-depression 31 changes along with this v-depression 31 and the increase of the distance of the optical axis of LED light source 4, namely the openings of sizes of this v-depression 31 increases towards the direction away from light guide plate 2 from the incidence surface 20 of this light guide plate 2, along the central authorities of this lenticule 3 towards on the direction of lenticule 3 both sides, the opening angle of multiple v-depressions 31 that the continuous scattering unit 30 of this lenticule 3 is formed increases gradually.
The triangular-section of the exiting surface 21 being parallel to light guide plate 2 of adjacent scattering unit 30 is away from the drift angle size similarities and differences (referring to Fig. 2) of light guide plate 2 incidence surface 20.In the present embodiment, the triangular-section of the exiting surface 21 being parallel to light guide plate 2 of the multiple continuous scattering unit 30 of this lenticule 3 increases progressively towards the both sides of lenticule 3 from the central authorities of this lenticule 3 away from the drift angle of light guide plate 2 incidence surface 20.Because the light of LED light source 4 mainly concentrates near optical axis, the value that scattering unit 30 towards this lenticule 3 of this LED light source 4 optical axis near zone is parallel to the drift angle (namely away from the drift angle of light guide plate 2 incidence surface 20) of the triangular-section of the exiting surface 21 of light guide plate 2 is relatively little, and along with this scattering unit 30 is gradually away from the central authorities of this lenticule 3, the value of the drift angle of the triangular-section of this scattering unit 30 increases gradually, thus progressive adjustment is carried out to the overall bright dipping of LED light source 4, LED light source 4 optical axis enclosure region is made comparatively to concentrate light scattering after this lenticule 3 relatively large, and it is relatively little away from light scattering after this lenticule 3 in the region of LED light source 4 optical axis, thus it is more even to make to be coupled into the light field that the light in light guide plate 2 formed.
Understandably, in other embodiments, quantity and the arrangement mode of multiple scattering units 30 of this lenticule 3 can adjust as required, such as, the triangular-section of the exiting surface 21 being parallel to light guide plate 2 of the multiple continuous scattering unit 30 of this lenticule 3 first increases rear reduction from the central authorities of this lenticule 3 towards the both sides of lenticule 3 away from the drift angle of light guide plate 2 incidence surface 20; Also or the triangular-section of the exiting surface 21 being parallel to light guide plate 2 of the multiple continuous scattering unit 30 of this lenticule 3 increase progressively towards the opposite side of this lenticule 3 from the side of this lenticule 3 away from the drift angle of light guide plate 2 incidence surface 20.
Preferably, the triangular-section of the exiting surface 21 being parallel to light guide plate 2 of the multiple continuous scattering unit 30 of this lenticule 3 is gradual change away from the drift angle size of light guide plate 2 incidence surface 20, and namely the multiple continuous scattering unit 30 of this lenticule 3 triangular-section that is parallel to the exiting surface 21 of light guide plate 2 to increase according to certain fixing angle value away from the drift angle of light guide plate 2 incidence surface 20 or reduces.
Refer to Fig. 3, scattering unit 30 with the interface of air on reflect when the light e sent enters scattering unit 30 by LED light source 4.If the incident angle α of light e
1enough little, then incident normal c constantly close to incident normal c, can be equal to refracted ray e when the most extreme by refracted ray e.Now, this refracted ray e(incident normal c) if be by chance totally reflected on scattering unit 30 with the interface of air, then the drift angle γ of the triangular cross section of this scattering unit 30 just equals the cirtical angle of total reflection degree α of this scattering unit 30
0because incident ray e most of under actual conditions is positioned at the right side of incident normal c (because LED light source 4 is arranged at incidence surface 20 front of this light guide plate 2, therefore the light major part that LED light source 4 sends is positioned at the right side of incident normal c), now refracted ray e can depart from incident normal c, the cirtical angle of total reflection α that the border that the incident angle causing the border of actual refracted ray e and scattering unit 30 to form is greater than incident normal c and scattering unit 30 is formed
0as long as propagate towards the interface of scattering unit 30 and air after namely incident ray e refraction enters scattering unit 30 arbitrarily, then must there is total reflection and enter in light guide plate 2 in refracted ray e.
In the present embodiment, the refractive index of this lenticule 3 is 1.51, calculates this lenticule 3 cirtical angle of total reflection α
0=41.47 °, the drift angle γ=α of the triangular cross section of this corresponding scattering unit 30
0=41.47 °, now to enter after scattering unit 30 and must be totally reflected towards the refracted ray e that scattering unit 30 and the interface of air are propagated.
The drift angle γ that at least one scattering unit 30 of this lenticule 3 is parallel to the triangular-section of the exiting surface 21 of light guide plate 2 is less than the cirtical angle of total reflection of this lenticule 3, i.e. γ <41.47 °, now enters after scattering unit 30 and the refracted ray e propagated towards scattering unit 30 and the interface of air can occur to be totally reflected at the interface of scattering unit 30 and air and enter in light guide plate 2.The width of the base L that the triangular-section of this scattering unit 30 is relative with drift angle γ is at 20 microns ~ 30 microns.
Refer to Fig. 4, the backlight module 1a of second embodiment of the invention comprises a light guide plate 2a and is arranged at two LED light source 4a of light guide plate 2a side.The incidence surface 20a of this light guide plate 2a is just provided with two groups of lenticule 3a to the position correspondence of two LED light source 4a.The drift angle that the scattering unit 30a of each group lenticule 3a is parallel to the triangular-section of the exiting surface 21a of light guide plate 2a increases towards the both sides of this group lenticule 3a gradually from the central authorities of this group lenticule 3a.In the present embodiment, the drift angle value that this lenticule 3a is positioned at the triangular-section of the scattering unit 30a of incidence surface 20a central authorities is approximately 85 degree.
Refer to Fig. 5, the backlight module 1b of third embodiment of the invention and the backlight module 1 of the first embodiment unlike: in the 3rd embodiment, this lenticule 3b is made up of some continuous print scattering unit 30b, this scattering unit 30b is quadrangular, and the cross sectional shape that this scattering unit 30b is parallel to the exiting surface 21b of light guide plate 2b is trapezoidal.Understandably, the cross sectional shape that this scattering unit 30b is parallel to the exiting surface 21b of light guide plate 2b in other embodiments also can be other polygons, only need to ensure to form V-shaped groove 31b between adjacent scattering unit 30b, and along with the scattering unit 30b of this lenticule 3b is away from the central authorities of this lenticule 3b, the opening size of the V-shaped groove 31b formed between adjacent scattering unit 30b also increases gradually.
In the present invention, this lenticule 3, 3a, 3b comprises some continuous print scattering units 30, 30a, 30b, adjacent scattering unit 30, 30a, v-depression 31 is formed between 30b, 31a, 31b, along this lenticule 3, 3a, the central authorities of 3b are towards this lenticule 3, 3a, on the direction of 3b both sides, this lenticule 3, 3a, the continuous scattering unit 30 of 3b, 30a, multiple v-depressions 31 that 30b is formed, 31a, the opening size of 31b is gradual change, makes LED light source 4, 4a, the light that 4b sends is to scattering unit 30, 30a, incident angle on 30b changes, this LED light source 4, 4a, the light that 4b sends enters this lenticule 3 through refraction, 3a, 3b, not only improves this LED light source 4, 4a, 4b and this light guide plate 2, 2a, the coupling efficiency of 2b, simultaneously this LED light source 4, 4a, the light that 4b sends is through this lenticule 3, 3a, towards light guide plate 2 after 3b refraction, 2a, the different directions scattering of 2b, thus in light guide plate 2, 2a, 2b inside forms uniform optical field distribution.
Understandably, this lenticule 3 in the present invention, 3a, the adjacent scattering unit 30 of 3b, 30a, the groove 31 of V-arrangement is formed between 30b, 31a, 31b, in other embodiments, this groove 31, 31a, the shape of 31b is not limited only to V-arrangement, and can make adjustment according to the bright dipping demand of reality, only need to ensure each groove 31, 31a, the openings of sizes of 31b is from this light guide plate 2, 2a, the incidence surface 20 of 2b, 20a, 20b is towards away from light guide plate 2, 2a, the direction of 2b increases, along this lenticule 3, 3a, the central authorities of 3b are towards this lenticule 3, 3a, on the direction of 3b both sides, this lenticule 3, 3a, the multiple continuous scattering unit 30 of 3b, 30a, multiple grooves 31 that 30b is formed, 31a, the opening angle of 31b is gradual change.
It is also understood that ground, this lenticule 3 in the present invention, 3a, 3b and light guide plate 2,2a, 2b are one-body molded, this lenticule 3,3a, 3b can lead to overetched mode and be formed on light guide plate 2,2a, 2b, in other embodiments, this lenticule 3,3a, 3b and light guide plate 2,2a, 2b divide out shaping, and then this lenticule 3,3a, 3b are fitted on this light guide plate 2, the incidence surface 20 of 2a, 2b, 20a, 20b by bonding mode.
Be understandable that, for the person of ordinary skill of the art, change and the distortion of other various correspondence can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (10)
1. a light guide plate, this light guide plate comprises incidence surface, the exiting surface adjacent with this incidence surface and the bottom surface relative with this exiting surface, it is characterized in that: described incidence surface has the lenticule for scattered beam, this lenticule comprises the scattering unit of some continuous arrangements, v-depression is formed between adjacent two scattering units, along these lenticular central authorities towards on the direction of these lenticule both sides, the opening size of multiple v-depressions that this lenticular multiple continuous scattering unit is formed is gradual change.
2. light guide plate as claimed in claim 1, is characterized in that: along these lenticular central authorities towards on the direction of these lenticule both sides, the opening size of this v-depression increases gradually.
3. light guide plate as claimed in claim 1, is characterized in that: this lenticule and light guide plate one-body molded.
4. light guide plate as claimed in claim 1, is characterized in that: the incidence surface of described light guide plate is mutually vertical with exiting surface, and the cross section that described scattering unit edge is parallel to light guide plate exiting surface is polygon.
5. light guide plate as claimed in claim 4, is characterized in that: described scattering unit is triangular prism or quadrangular, and the cross section that described scattering unit edge is parallel to light guide plate exiting surface direction is triangle or trapezoidal.
6. light guide plate as claimed in claim 5, is characterized in that: the drift angle size away from described light guide plate incidence surface that adjacent scattering unit edge is parallel to the triangular-section in the exiting surface direction of light guide plate is gradual change.
7. light guide plate as claimed in claim 6, is characterized in that: the drift angle of the described triangular-section of described lenticular multiple continuous scattering unit increases towards lenticular both sides gradually from these lenticular central authorities.
8. light guide plate as claimed in claim 6, is characterized in that: the drift angle of the described triangular-section of described at least one scattering unit lenticular is less than this lenticular cirtical angle of total reflection.
9. a backlight module, comprise a light guide plate and at least one LED light source being arranged at this light guide plate side, it is characterized in that: the light guide plate of described light guide plate according to any one of claim 1-8 item, this at least one LED light source is arranged towards the lenticule on described light guide plate incidence surface.
10. a light guide plate, this light guide plate comprises incidence surface, the exiting surface adjacent with this incidence surface and the bottom surface relative with this exiting surface, it is characterized in that: described incidence surface has the lenticule for scattered beam, this lenticule comprises the scattering unit of some continuous arrangements, groove is formed between adjacent two scattering units, the openings of sizes of each groove increases towards the direction away from light guide plate from the incidence surface of this light guide plate, along these lenticular central authorities towards on the direction of these lenticule both sides, the opening angle of multiple grooves that this lenticular multiple continuous scattering unit is formed is gradual change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310318132.4A CN104345376A (en) | 2013-07-26 | 2013-07-26 | Light guide plate and backlight module with use of light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310318132.4A CN104345376A (en) | 2013-07-26 | 2013-07-26 | Light guide plate and backlight module with use of light guide plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104345376A true CN104345376A (en) | 2015-02-11 |
Family
ID=52501371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310318132.4A Pending CN104345376A (en) | 2013-07-26 | 2013-07-26 | Light guide plate and backlight module with use of light guide plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN104345376A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301004A (en) * | 2015-11-05 | 2016-02-03 | 苏州威盛视信息科技有限公司 | Light source detection device |
| CN105445829A (en) * | 2016-01-08 | 2016-03-30 | 京东方光科技有限公司 | Prism membrane, light guide plate, backlight module and display apparatus |
| WO2016187899A1 (en) * | 2015-05-26 | 2016-12-01 | 武汉华星光电技术有限公司 | Direct led backlight module and liquid crystal display device |
| CN106707402A (en) * | 2017-01-11 | 2017-05-24 | 青岛骐骥光电科技有限公司 | Device and method for solving Hotspot problem of side-inlet type light guide plate |
| CN111812766A (en) * | 2019-04-11 | 2020-10-23 | 立景光电股份有限公司 | Front light display |
-
2013
- 2013-07-26 CN CN201310318132.4A patent/CN104345376A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016187899A1 (en) * | 2015-05-26 | 2016-12-01 | 武汉华星光电技术有限公司 | Direct led backlight module and liquid crystal display device |
| CN105301004A (en) * | 2015-11-05 | 2016-02-03 | 苏州威盛视信息科技有限公司 | Light source detection device |
| CN105445829A (en) * | 2016-01-08 | 2016-03-30 | 京东方光科技有限公司 | Prism membrane, light guide plate, backlight module and display apparatus |
| WO2017118033A1 (en) * | 2016-01-08 | 2017-07-13 | 京东方科技集团股份有限公司 | Prism film, light guide plate, backlight module and display apparatus |
| CN105445829B (en) * | 2016-01-08 | 2018-05-25 | 京东方光科技有限公司 | Prism film, light guide plate, backlight module and display device |
| US10571620B2 (en) | 2016-01-08 | 2020-02-25 | Boe Technology Group Co., Ltd. | Prism film, light guide plate, backlight module and display apparatus |
| CN106707402A (en) * | 2017-01-11 | 2017-05-24 | 青岛骐骥光电科技有限公司 | Device and method for solving Hotspot problem of side-inlet type light guide plate |
| CN106707402B (en) * | 2017-01-11 | 2019-04-23 | 青岛骐骥光电科技有限公司 | A method of solving the problems, such as edge-type light guide plate Hotspot |
| CN111812766A (en) * | 2019-04-11 | 2020-10-23 | 立景光电股份有限公司 | Front light display |
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Application publication date: 20150211 |