CN107991809A - Narrow frame backlight module - Google Patents
Narrow frame backlight module Download PDFInfo
- Publication number
- CN107991809A CN107991809A CN201711428110.8A CN201711428110A CN107991809A CN 107991809 A CN107991809 A CN 107991809A CN 201711428110 A CN201711428110 A CN 201711428110A CN 107991809 A CN107991809 A CN 107991809A
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- China
- Prior art keywords
- led
- guide plate
- backlight module
- light guide
- light source
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- 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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- 239000000463 material Substances 0.000 claims abstract description 13
- 238000009966 trimming Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 claims 1
- 239000010408 film Substances 0.000 description 14
- 239000004973 liquid crystal related substance Substances 0.000 description 11
- 238000011161 development Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012788 optical film Substances 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 230000005142 aphototropism Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to display field, open narrow frame backlight module, including：Reflector (2) is sheathed on the outside of light guide plate (1), light guide plate (1) includes two opposite long sides and two opposite short sides, LED bases (3) are installed on the bottom side of short side, and it is installed on heat sink material (5), LED light source (4) is arranged on LED bases (3), and is provided with and LED light source (4) matched heat emission hole (6) on reflector (2)；Light guide plate (1), diffuser plate (7), the first brightness enhancement film (8) and the second brightness enhancement film (9) are cascading outwardly from the interior of reflector (2).The narrow frame backlight module overcomes the problem of backlight module frame of the prior art is wider, realizes the narrow frame of narrow frame backlight module.
Description
Technical field
The present invention relates to display field, and in particular, to narrow frame backlight module.
Background technology
Liquid crystal display is in dominant position in FPD, is with a wide range of applications.Backlight module is as liquid crystal
One of core part of display, in order to keep it to make its lightweight, slimming, low energy consumption, height in the competitiveness of future market
Efficiency, high brightness, become important research direction.
Backlight module can be divided into two kinds of straight-down negative and side entering type.Down straight aphototropism mode set is that light source is placed in liquid crystal panel
Lower section, by forming uniform area source after the optical film assemblies such as diffusion barrier, its brightness is high, and uniformity is good, but thickness is big.Side enters
Formula backlight module is that backlight is placed in light guide plate side, and the light that light source is sent enters light guide plate from side i.e. incidence surface, warp
After crossing total reflection and the scattering of bottom surface site, projected from light-emitting surface, then area source is formed after optical film assembly.Side entering type is carried on the back
Optical mode group thickness is small, is easy to lightening.
In backlight module, design and manufacture, the selection of backlight of light guide plate are all most important.Light guide plate major function
It is to guide radiation direction, control the uniformity of brightness, its performance directly determines the performance of backlight module, its shape and inside
Structure design has a great impact uniformity.In backlight module, in addition to light guide plate, the selection of backlight also directly affects
The display effect of liquid crystal display.Since liquid crystal does not shine in itself, so needing backlight module to provide, brightness is sufficient and distribution is equal
Even area source, while the liquid crystal panel is normally shown image, possesses enough brightness and contrasts.Existing backlight master
There are cold-cathode fluorescence lamp (CCFL) and light emitting diode (LED).CCFL is line source, is mainly used for large and medium-sized backlight module；
LED is point light source, is mainly used for small-sized backlight module.The liquid crystal display early stage of development uses CCFL as backlight mostly, but
Its energy consumption is big, short life, structure rapid wear, colour gamut are small, simultaneously because the use of mercury brings the hidden danger of environmental problem.LED backlight
Luminous efficiency height, energy conservation and environmental protection,
Color representation power is strong, long lifespan etc., has already taken up a part of market, and be considered as LCD backlight future
The main flow direction of development.
With the progress of liquid crystal display manufacturing technology, people need to show area bigger, more frivolous, more aesthetically pleasing
Liquid crystal display product.Therefore, in order to lift visual effect, meets the needs of people, the narrow frameization of liquid crystal display has become
Development trend.And one of the core part of backlight module as liquid crystal display, its narrow frameization is most important.
The content of the invention
The object of the present invention is to provide a kind of narrow frame backlight module, which overcomes in the prior art
Backlight module frame it is wider the problem of, realize the narrow frame of narrow frame backlight module.
To achieve these goals, the present invention provides a kind of narrow frame backlight module, which includes：Lead
Tabula rasa, reflector, LED bases, LED light source, heat sink material, heat emission hole, diffuser plate, the first brightness enhancement film and the second brightness enhancement film；Its
In, the reflector is sheathed on the outside of the light guide plate, and the light guide plate includes two opposite long sides and two are opposite
Short side, the LED floor installations are installed on the heat sink material in the bottom side of the short side, the LED light source
It is arranged on the LED bases, and is provided with and the matched heat emission hole of the LED light source on the reflector；It is described to lead
Tabula rasa, diffuser plate, the first brightness enhancement film and the second brightness enhancement film are cascading outwardly out of described reflector.
Preferably, two opposite short sides of the light guide plate are handled for inclined trimming, and the LED light source is arranged at institute
State the lower section of the trimming processing of light guide plate.
Preferably, first brightness enhancement film and the second brightness enhancement film are placed with prism orthogonal direction.
Preferably, the LED light source of the lower section of the side short side of the light guide plate is red LED, the light guide plate it is another
The LED light source issued of side short side is blue led.
Preferably, fluorescent material is provided with the LED light source, red LED and blue led is mixed into white light.
Preferably, the quantity of the LED light source is 10, and is symmetrically disposed on two opposite short sides of the light guide plate
Bottom side.
Preferably, it is provided with the light guide plate and the matched groove of the LED light source.
Through the above technical solutions, make backlight module by adjusting the construction profile of light guide plate and the position of LED light bar
Overall structure it is more compact, the narrow frame of backlight module is realized with this, the advantage is that can increase display area, improve
Light efficiency, and its construction profile is beautiful, meets the development trend of LCD backlight module.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Attached drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the front view for illustrating a kind of narrow frame backlight module of the present invention；
Fig. 2 is the structure diagram for the light guide plate for illustrating a kind of narrow frame backlight module of the present invention；
Fig. 3 is a kind of reflector, the structure diagram of LED light source for illustrating the present invention；
Fig. 4 is the front view for the another embodiment for illustrating a kind of narrow frame backlight module of the present invention；
Fig. 5 is the structural representation of the light guide plate for the another embodiment for illustrating a kind of frame backlight module of the present invention
Figure；And
Fig. 6 is the structure diagram for the another embodiment for illustrating a kind of narrow frame backlight module of the present invention.
Description of reference numerals
1 light guide plate, 2 reflector
3 LED bases, 4 LED light source
5 heat sink material, 6 heat emission hole
7 diffuser plate, 8 first brightness enhancement film
9 second brightness enhancement films
Embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
In the present invention, in the case where not making conversely explanation, the noun of locality such as " upper and lower, left and right " used typically refers to
As shown in Figure 1 up and down." inside and outside " refer to specific profile it is interior with it is outer." remote, near " refers to relative to the remote of some component
With it is near.
The present invention provides a kind of narrow frame backlight module, which includes：Light guide plate 1, reflector 2, LED
Base 3, LED light source 4, heat sink material 5, heat emission hole 6, diffuser plate 7, the first brightness enhancement film 8 and the second brightness enhancement film 9；Wherein, it is described anti-
The outside that cover 2 is sheathed on the light guide plate 1 is penetrated, the light guide plate 1 includes two opposite long sides and two opposite short sides,
The LED bases 3 are installed on the bottom side of the short side, and are installed on the heat sink material 5, and the LED light source 4 is set
In on the LED bases 3, and it is provided with and the matched heat emission hole 6 of the LED light source 4 on the reflector 2；It is described to lead
Tabula rasa 1, diffuser plate 7, the first brightness enhancement film 8 and the second brightness enhancement film 9 are cascading outwardly out of described reflector 2.
Through the above technical solutions, make backlight module by adjusting the construction profile of light guide plate 1 and the position of LED light bar
Overall structure it is more compact, the narrow frame of backlight module is realized with this, the advantage is that can increase display area, improve
Light efficiency, and its construction profile is beautiful, meets the development trend of LCD backlight module.
In a kind of embodiment of the present invention, two opposite short sides of the light guide plate 1 are inclined trimming
Processing, to place LED light bar in inclined downward, the LED light source 4 is arranged at the lower section of the trimming processing of the light guide plate 1.
Reflector 2 is used to reflect the light leaked out from 1 side of light guide plate and bottom surface, to strengthen light utilization；Diffusion
Plate 7 is used to scatter from the uniform light of the front of light guide plate 1 outgoing.
In a kind of embodiment of the present invention, 8 and second brightness enhancement film 9 of the first brightness enhancement film is with the orthogonal side of prism
To placement.By above-mentioned embodiment, to improve front face brightness.
In a kind of embodiment of the present invention, the LED light source 4 of the lower section of the side short side of the light guide plate 1 is
Red LED, the LED light source 4 issued of the opposite side short side of the light guide plate 1 is blue led.
In this kind of embodiment, fluorescent material is provided with the LED light source 4, red LED and blue led are mixed
Synthesize white light.
LED light source 4 below 1 incidence surface of light guide plate is red (or blueness) LED, and the LED light source 4 below incidence surface is indigo plant
Color (or red) LED, and fluorescent material is scribbled on incidence surface, blue led excitation fluorescent material is converted to green light, with reference to red
The feux rouges that LED light source 4 is sent, white light is mixed into light guide plate 1.In this embodiment, the border width of backlight module is only
For the thickness of reflector 2, more traditional side entrance back module, border width significantly reduces.
In a kind of embodiment of the present invention, the quantity of the LED light source 4 is 10, and is symmetrically disposed on institute
State the bottom side of two opposite short sides of light guide plate 1.
In a kind of embodiment of the present invention, it is provided with the light guide plate 1 and is engaged with the LED light source 4
Groove.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (7)
1. a kind of narrow frame backlight module, it is characterised in that the narrow frame backlight module includes：Light guide plate (1), reflector (2),
LED bases (3), LED light source (4), heat sink material (5), heat emission hole (6), diffuser plate (7), the first brightness enhancement film (8) and the second blast
Film (9)；Wherein, the reflector (2) is sheathed on the outside of the light guide plate (1), and the light guide plate (1) includes two relatively
Long side and two opposite short sides, the LED bases (3) are installed on the bottom side of the short side, and are installed on the heat dissipation material
Expect on (5), the LED light source (4) is arranged on the LED bases (3), and be provided with the reflector (2) with
The matched heat emission hole of the LED light source (4) (6)；The light guide plate (1), diffuser plate (7), the first brightness enhancement film (8) and second increase
Bright film (9) is cascading outwardly from the interior of the reflector (2).
2. narrow frame backlight module according to claim 1, it is characterised in that two of the light guide plate (1) opposite
Short side is handled for inclined trimming, and the LED light source (4) is arranged at the lower section of the trimming processing of the light guide plate (1).
3. narrow frame backlight module according to claim 1, it is characterised in that first brightness enhancement film (8) and second increases
Bright film (9) is placed with prism orthogonal direction.
4. narrow frame backlight module according to claim 1, it is characterised in that the side short side of the light guide plate (1)
The LED light source (4) of lower section is red LED, and the LED light source (4) issued of the opposite side short side of the light guide plate (1) is blueness
LED。
5. narrow frame backlight module according to claim 4, it is characterised in that be provided with fluorescence on the LED light source (4)
Material, white light is mixed into by red LED and blue led.
6. narrow frame backlight module according to claim 1, it is characterised in that the quantity of the LED light source (4) is 10
It is a, and it is symmetrically disposed on the bottom side of two opposite short sides of the light guide plate (1).
7. narrow frame backlight module according to claim 1, it is characterised in that be provided with the light guide plate (1) and institute
State LED light source (4) matched groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711428110.8A CN107991809A (en) | 2017-12-26 | 2017-12-26 | Narrow frame backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711428110.8A CN107991809A (en) | 2017-12-26 | 2017-12-26 | Narrow frame backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107991809A true CN107991809A (en) | 2018-05-04 |
Family
ID=62042739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711428110.8A Pending CN107991809A (en) | 2017-12-26 | 2017-12-26 | Narrow frame backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107991809A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255836A (en) * | 2020-11-03 | 2021-01-22 | 重庆翰博光电有限公司 | Side light leakage backlight module suitable for super narrow frame solution |
| CN114924344A (en) * | 2022-05-31 | 2022-08-19 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
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| US20110211141A1 (en) * | 2008-12-05 | 2011-09-01 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN103700754A (en) * | 2013-12-13 | 2014-04-02 | 京东方科技集团股份有限公司 | LED (Light Emitting Diode) encapsulation piece, backlight module and display device |
| CN103969720A (en) * | 2014-05-27 | 2014-08-06 | 厦门天马微电子有限公司 | Brightness enhancing film, preparing method of brightness enhancing film, and displaying device comprising brightness enhancing film |
| CN204028519U (en) * | 2014-09-02 | 2014-12-17 | 长智光电（四川）有限公司 | The matched combined structure of a kind of brightness enhancement film and liquid crystal panel |
| CN104613387A (en) * | 2015-02-28 | 2015-05-13 | 合肥京东方光电科技有限公司 | Backlight die set and display device |
| CN105867005A (en) * | 2015-12-02 | 2016-08-17 | 东莞市纳利光学材料有限公司 | A brightness enhancement film with an anti-electromagnetic wave effect and a method for preparing the same |
| CN107153234A (en) * | 2017-04-28 | 2017-09-12 | 深圳市南极光电子科技有限公司 | It is a kind of to improve the back light source structure and LCDs of backlight edge bright line |
| CN207833182U (en) * | 2017-12-26 | 2018-09-07 | 中航华东光电有限公司 | Narrow frame backlight module |
-
2017
- 2017-12-26 CN CN201711428110.8A patent/CN107991809A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110211141A1 (en) * | 2008-12-05 | 2011-09-01 | Sharp Kabushiki Kaisha | Lighting device, display device and television receiver |
| CN103700754A (en) * | 2013-12-13 | 2014-04-02 | 京东方科技集团股份有限公司 | LED (Light Emitting Diode) encapsulation piece, backlight module and display device |
| CN103969720A (en) * | 2014-05-27 | 2014-08-06 | 厦门天马微电子有限公司 | Brightness enhancing film, preparing method of brightness enhancing film, and displaying device comprising brightness enhancing film |
| CN204028519U (en) * | 2014-09-02 | 2014-12-17 | 长智光电（四川）有限公司 | The matched combined structure of a kind of brightness enhancement film and liquid crystal panel |
| CN104613387A (en) * | 2015-02-28 | 2015-05-13 | 合肥京东方光电科技有限公司 | Backlight die set and display device |
| CN105867005A (en) * | 2015-12-02 | 2016-08-17 | 东莞市纳利光学材料有限公司 | A brightness enhancement film with an anti-electromagnetic wave effect and a method for preparing the same |
| CN107153234A (en) * | 2017-04-28 | 2017-09-12 | 深圳市南极光电子科技有限公司 | It is a kind of to improve the back light source structure and LCDs of backlight edge bright line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112255836A (en) * | 2020-11-03 | 2021-01-22 | 重庆翰博光电有限公司 | Side light leakage backlight module suitable for super narrow frame solution |
| CN114924344A (en) * | 2022-05-31 | 2022-08-19 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
| CN114924344B (en) * | 2022-05-31 | 2024-03-29 | 武汉华星光电技术有限公司 | Light guide plate and backlight module |
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