CN113721390A - Diffusion film for mini LED backlight module, preparation method of diffusion film and backlight module - Google Patents
Diffusion film for mini LED backlight module, preparation method of diffusion film and backlight module Download PDFInfo
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- CN113721390A CN113721390A CN202111024727.XA CN202111024727A CN113721390A CN 113721390 A CN113721390 A CN 113721390A CN 202111024727 A CN202111024727 A CN 202111024727A CN 113721390 A CN113721390 A CN 113721390A
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 35
- 230000004888 barrier function Effects 0.000 claims abstract 2
- 238000007639 printing Methods 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000002834 transmittance Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000007650 screen-printing Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 125000001475 halogen functional group Chemical group 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 50
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 235000012431 wafers Nutrition 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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- 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
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a mini LED backlight module, a preparation method thereof and a backlight module. This diffusion barrier sets up on the light emitting area of lamp plate, its characterized in that: the diffusion film comprises a base material, wherein a first pattern layer and a second pattern layer are arranged on the base material, and first patterns and second patterns which are different in shape, different in area and overlapped with each other are respectively arranged on the first pattern layer and the second pattern layer. As shown in the figure, the light source of the 100, mini backlight panel may be a wafer or an LED; 200. a first printed image layer; 300. and a second printed image layer. The invention also discloses a preparation method of the diffusion film and a backlight module using the diffusion film. The diffusion film for the mini LED backlight module has the characteristics of uniform light, weakened bright spots, faded dark lines and no halo and shadow phenomena.
Description
Background
The invention relates to the technical field of backlight modules, in particular to a diffusion film for a mini LED backlight module, a preparation method of the diffusion film and the backlight module.
Background
The Mini LED backlight module reduces the size of the traditional LED crystal grains to be 100-200 mu m, improves the number of backlight sources, is matched with a backlight partition control system to realize regional brightness adjustment, brings better visual experience, adopts a blue light source to convert white light through a film material to realize wide color gamut colors, and has wide application prospect.
In the mini backlight, a diffusion film or a diffusion plate is directly contacted with an LED light source (or a wafer), light emitted by the LED light source is emitted into the diffusion film or the diffusion plate, the light source is diffused by the diffusion film or the diffusion plate through diffusion particles, the light is converted into white light through a conversion film, and the light is concentrated in the vertical direction through a prism film. The light scattering of the diffuser film or the diffuser plate is particularly important in the adjustment between the bright and dark areas of the light source. The number of the wafers is as small as possible under the consideration of the cost of the wafers and the difficulty of die bonding, so that a shadow between a bright spot halo and a light source is generated, and the application of the LED backlight module is severely limited.
Disclosure of Invention
The invention aims to provide a diffusion film for a mini LED backlight module, a preparation method of the diffusion film and the backlight module, and the diffusion film has the characteristics of uniform light, weak bright spots, fading dark lines and no halo and dark shadow phenomena.
The invention can be realized by the following technical scheme:
the invention discloses a diffusion film for a mini LED backlight module, which is arranged on the light emitting surface of a lamp panel, and comprises a base material, wherein a first pattern layer and a second pattern layer are arranged on the base material, and the first pattern layer and the second pattern layer are respectively provided with a first pattern and a second pattern which are different in shape, different in area and overlapped with each other.
Further, the first pattern and the second pattern are partially or completely overlapped.
Furthermore, the first pattern layer and the second pattern layer are arranged on the same side of the base material.
Furthermore, the first pattern layer and the second pattern layer are respectively arranged on two sides of the base material.
Furthermore, the first pattern layer and the second pattern layer are white oil printing layers formed by silk screen printing.
Furthermore, the first pattern and the second pattern are both centrosymmetric patterns or axisymmetric patterns, and the symmetry centers or symmetry axes of the first pattern and the second pattern are coincident with each other.
Furthermore, the thickness of the diffusion film is 0.1-2.0 mm, the light transmittance is 55-95%, and the haze is 50% -95%. The thickness is too thin, the product is inconvenient to assemble, the OD (distance between the backlight and the screen) corresponding to the too thick thickness is increased, and the thickness of the module is increased; the light transmittance of the material is too low, the brightness of the finished product is influenced, and the low haze is not beneficial to the fading of the shadow between the light source and the light source.
Further, the base material is a PET base material or a PC base material, and the PET base material or the PC base material is added with a diffusing agent or coated with UV optical glue on the surface.
Another aspect of the present invention is a method for manufacturing the diffusion membrane described above, comprising the steps of:
s1, printing of the first pattern layer: printing a first pattern on the surface of the substrate to form a first pattern layer;
s2, printing of a second pattern layer: printing a second pattern on the other surface of the substrate or the surface of the first pattern layer to form a second pattern layer;
the first pattern and the second pattern are overlapped with each other, and the area of the first pattern is larger than that of the second pattern.
Another aspect of the present invention is to protect a mini LED backlight module using the above diffusion film.
The diffusion film for the mini LED backlight module, the preparation method thereof and the backlight module have the following beneficial effects:
because the diffusion film is provided with the first pattern layer and the second pattern layer, the overlapped part forms a double-layer pattern layer, and the front light of the light source is greatly weakened and shielded; the part of the two pattern layers connected, such as the side surface of the second pattern layer, only shields a part of light to effectively reduce halation because of only a single pattern layer; the single-layer pattern part of the non-overlapping area is arranged between the two, so that the formation of a shadow is effectively avoided. The diffusion film, the quantum film and the prism brightness enhancement film form a backlight module, and have the characteristics of uniform light, weakened bright spots, faded dark lines and no halo and shadow phenomena.
Drawings
FIGS. 1 to 5 are schematic views of the production process of example 4;
FIG. 6 is a schematic diagram of the optical path principle analysis in embodiment 5;
the reference numerals include: 100. an LED light source; 200. a first pattern layer; 300. and a second pattern layer.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the following detailed description of the present invention is provided with reference to the accompanying drawings.
Example 1
The invention discloses a diffusion film for a mini LED backlight module, which is arranged on the light emitting surface of a lamp panel, and comprises a base material, wherein a first pattern layer and a second pattern layer are arranged on the base material, and the first pattern layer and the second pattern layer are respectively provided with a first pattern and a second pattern which are different in shape, different in area and overlapped with each other.
In the present invention, the first pattern and the second pattern are partially or entirely overlapped. The first pattern and the second pattern are both centrosymmetric patterns or axisymmetric patterns, and the symmetry centers or symmetry axes of the first pattern and the second pattern are overlapped. Specifically, the first pattern and the second pattern overlap each other, the area of the first pattern is larger than that of the second pattern, the first pattern and the second pattern are preferably circular or quadrilateral, and the peripheral boundary of the second pattern does not exceed the boundary of the first pattern.
In the invention, the first pattern layer and the second pattern layer are arranged on the same side of the base material. Or the first pattern layer and the second pattern layer are respectively arranged on two sides of the base material. The first pattern layer and the second pattern layer are arranged on the light incident surface or the light emergent surface of the substrate and have corresponding effects.
Furthermore, the first pattern layer and the second pattern layer are white oil printing layers formed by silk screen printing.
Furthermore, the thickness of the diffusion film is 0.1-2.0 mm, the light transmittance is 55-95%, and the haze is 50% -95%.
Further, the base material is a PET base material or a PC base material, and the PET base material or the PC base material is added with a diffusing agent or coated with UV optical glue on the surface.
Example 2
Another aspect of the present invention is a method for manufacturing the diffusion membrane described above, comprising the steps of:
s1, printing of the first pattern layer: printing a first pattern on the surface of the substrate to form a first pattern layer;
s2, printing of a second pattern layer: printing a second pattern on the other surface of the substrate or the surface of the first pattern layer to form a second pattern layer;
the first pattern and the second pattern are overlapped with each other, and the area of the first pattern is larger than that of the second pattern.
Example 3
Another aspect of the present invention is to protect a mini LED backlight module using the above diffusion film.
Example 4
The LED light sources of the mini LED backlight panel are arranged in a matrix as shown in fig. 1, and the array pattern of fig. 2 (corresponding to the light source position of fig. 1) is used for bright spot attenuation. The manufacturing method of the array pattern shown in fig. 2 comprises the following steps: carrying out silk-screen printing on the lower surface of a base material with the thickness of 0.12mm to form a first pattern layer, and printing to form a first pattern shown in the figure 3; printing of a second pattern layer of the second pattern shown in fig. 4 is then performed. The area of the second pattern is controlled to be different from the first pattern during printing. Or the sequence of the two printed patterns can be changed, and the two patterns have area difference, so that the silk-screen patterns with different light transmittance shown in fig. 5 are formed. The thickness of the entire diffusion film at this time is 0.14mm or less.
Example 5
The pattern positions of the diffusion film correspond to the LED light sources of the backlight panel in a one-to-one manner, and the diffusion film is assembled as shown in fig. 4. In fig. 6: the front light a of the LED light source 100 can be greatly weakened and shielded by double-layer printing of the first pattern layer 200 and the second pattern layer 300, and the silk screens c and c on the side surfaces,Only the first pattern layer 200 can shield a part of light, and halo is reduced; the light paths b and b' are between the two.
Compared with the mini backlight scheme on the market, the prior art uses two layers of prism films to diffuse light, the manufacturing requirement of the prism films is high, and two prism films are needed to be matched for use, so that the cost is increased. The cost of the silk-screen diffusion film material can be reduced by 10 to 20 percent on the existing cost.
Example 6
In the Mini LED backlight module, the light source is usually formed by arranging a plurality of light emitting units in an array, and the silk-screen pattern is disposed right above the light emitting units. The assembly gap can reach zero spacing, namely, the assembly can be directly attached and assembled.
Example 7
The invention also provides a backlight display device which comprises the silk-screen diffusion film or the backlight module. The backlight display device can be a product or a component with any display function, such as a tablet personal computer, a vehicle-mounted display, a liquid crystal television, a liquid crystal display, a notebook computer, a computer display, a digital photo frame, a navigator and the like.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a diffusion barrier for mini LED backlight unit sets up on the light emitting area of lamp plate, its characterized in that: the diffusion film comprises a base material, wherein a first pattern layer and a second pattern layer are arranged on the base material, and first patterns and second patterns which are different in shape, different in area and overlapped with each other are respectively arranged on the first pattern layer and the second pattern layer.
2. The diffusion film for a mini LED backlight module as set forth in claim 1, wherein: the first pattern and the second pattern are partially or completely overlapped.
3. The diffusion film for a mini LED backlight module as set forth in claim 2, wherein: the first pattern layer and the second pattern layer are arranged on the same side of the base material.
4. The diffusion film for a mini LED backlight module as set forth in claim 3, wherein: the first pattern layer and the second pattern layer are respectively arranged on two sides of the base material.
5. The diffusion film for a mini LED backlight module as set forth in claim 3 or 4, wherein: the first pattern layer and the second pattern layer are white oil printing layers formed by silk screen printing.
6. The diffusion film for a mini LED backlight module as set forth in claim 5, wherein: the first pattern and the second pattern are both centrosymmetric patterns or axisymmetric patterns, and the symmetric centers or symmetric axes of the first pattern and the second pattern are overlapped.
7. The diffusion film for a mini LED backlight module as set forth in claim 6, wherein: the thickness of the diffusion film is 0.1-2.0 mm, the light transmittance is 55-95%, and the haze is 50% -95%.
8. The diffusion film for a mini LED backlight module as set forth in claim 7, wherein: the base material is a PET base material or a PC base material, and the PET base material or the PC base material is added with a diffusant or the surface of the PET base material or the PC base material is coated with UV optical glue.
9. A method for producing the diffusion membrane of claims 1 to 8, characterized by comprising the steps of:
s1, printing of the first pattern layer: printing a first pattern on the surface of the substrate to form a first pattern layer;
s2, printing of a second pattern layer: printing a second pattern on the other surface of the substrate or the surface of the first pattern layer to form a second pattern layer;
the first pattern and the second pattern overlap each other, and the area of the first pattern is larger than that of the second pattern.
10. A mini LED backlight module using the diffusion film of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111024727.XA CN113721390A (en) | 2021-09-02 | 2021-09-02 | Diffusion film for mini LED backlight module, preparation method of diffusion film and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111024727.XA CN113721390A (en) | 2021-09-02 | 2021-09-02 | Diffusion film for mini LED backlight module, preparation method of diffusion film and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113721390A true CN113721390A (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111024727.XA Pending CN113721390A (en) | 2021-09-02 | 2021-09-02 | Diffusion film for mini LED backlight module, preparation method of diffusion film and backlight module |
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| CN (1) | CN113721390A (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100213626A1 (en) * | 2007-09-12 | 2010-08-26 | Chien-Cheng Lin | Diffusion film light diffusion structure molding process and installation thereof |
| KR20110104402A (en) * | 2010-03-16 | 2011-09-22 | 엘지이노텍 주식회사 | Back light umit within resin layer for light-guide and lcd using the same |
| CN202032466U (en) * | 2010-12-31 | 2011-11-09 | 创维液晶器件(深圳)有限公司 | Diffuser plate and liquid crystal back light module |
| KR20120003272A (en) * | 2010-07-02 | 2012-01-10 | 엘지이노텍 주식회사 | Back light umit within resin layer for light-guide and lcd using the same |
| CN102436019A (en) * | 2011-10-29 | 2012-05-02 | 合肥乐凯科技产业有限公司 | Optical upper diffusion film and light crystal display backlight source using same |
| CN103412355A (en) * | 2013-08-19 | 2013-11-27 | 宁波激智科技股份有限公司 | Diffusion membrane capable of improving viewing angle |
| KR20150001420A (en) * | 2013-06-27 | 2015-01-06 | 엘지디스플레이 주식회사 | Glass diffusion plate, backlight unit using the glass diffusion plate, and liquid crystal display using the backlight unit |
| CN107003558A (en) * | 2014-12-12 | 2017-08-01 | 三星电子株式会社 | Composite optical sheet, the Liquid crystal disply device and its preparation method using it |
| CN208636624U (en) * | 2018-07-23 | 2019-03-22 | 东莞市谷麦光学科技有限公司 | A kind of high brightness backlights mould group |
| CN209296965U (en) * | 2018-12-24 | 2019-08-23 | 佛山市国星光电股份有限公司 | A kind of lamp plate, display module and electrical equipment |
| CN110824596A (en) * | 2018-08-07 | 2020-02-21 | 中强光电股份有限公司 | Diffusion plate, direct type backlight module and display device |
| CN111175867A (en) * | 2020-01-14 | 2020-05-19 | 深圳睿晟自动化技术有限公司 | Diffusion film and structured light projection module correction device |
| KR20200057264A (en) * | 2018-11-16 | 2020-05-26 | 주식회사 엘엠에스 | A diffusion sheet having improved shielding performance and a backlight unit including the diffusion sheet |
| CN111240090A (en) * | 2020-01-15 | 2020-06-05 | 精电(河源)显示技术有限公司 | Optical film with uniform backlight, direct type backlight module and display device |
| CN111752045A (en) * | 2020-07-15 | 2020-10-09 | 武汉华星光电技术有限公司 | Backlight module and display device |
| WO2020222358A1 (en) * | 2019-04-30 | 2020-11-05 | 희성전자 주식회사 | Diffusion plate having optical path control function and backlight device |
| CN212781321U (en) * | 2020-09-11 | 2021-03-23 | 谷麦光电科技股份有限公司 | Light guide plate and diffusion plate integrated module |
| CN113156558A (en) * | 2021-03-19 | 2021-07-23 | 苏州维旺科技有限公司 | Mini LED diffusion sheet, preparation process thereof and backlight module |
-
2021
- 2021-09-02 CN CN202111024727.XA patent/CN113721390A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100213626A1 (en) * | 2007-09-12 | 2010-08-26 | Chien-Cheng Lin | Diffusion film light diffusion structure molding process and installation thereof |
| KR20110104402A (en) * | 2010-03-16 | 2011-09-22 | 엘지이노텍 주식회사 | Back light umit within resin layer for light-guide and lcd using the same |
| KR20120003272A (en) * | 2010-07-02 | 2012-01-10 | 엘지이노텍 주식회사 | Back light umit within resin layer for light-guide and lcd using the same |
| CN202032466U (en) * | 2010-12-31 | 2011-11-09 | 创维液晶器件(深圳)有限公司 | Diffuser plate and liquid crystal back light module |
| CN102436019A (en) * | 2011-10-29 | 2012-05-02 | 合肥乐凯科技产业有限公司 | Optical upper diffusion film and light crystal display backlight source using same |
| KR20150001420A (en) * | 2013-06-27 | 2015-01-06 | 엘지디스플레이 주식회사 | Glass diffusion plate, backlight unit using the glass diffusion plate, and liquid crystal display using the backlight unit |
| CN103412355A (en) * | 2013-08-19 | 2013-11-27 | 宁波激智科技股份有限公司 | Diffusion membrane capable of improving viewing angle |
| CN107003558A (en) * | 2014-12-12 | 2017-08-01 | 三星电子株式会社 | Composite optical sheet, the Liquid crystal disply device and its preparation method using it |
| CN208636624U (en) * | 2018-07-23 | 2019-03-22 | 东莞市谷麦光学科技有限公司 | A kind of high brightness backlights mould group |
| CN110824596A (en) * | 2018-08-07 | 2020-02-21 | 中强光电股份有限公司 | Diffusion plate, direct type backlight module and display device |
| KR20200057264A (en) * | 2018-11-16 | 2020-05-26 | 주식회사 엘엠에스 | A diffusion sheet having improved shielding performance and a backlight unit including the diffusion sheet |
| CN209296965U (en) * | 2018-12-24 | 2019-08-23 | 佛山市国星光电股份有限公司 | A kind of lamp plate, display module and electrical equipment |
| WO2020222358A1 (en) * | 2019-04-30 | 2020-11-05 | 희성전자 주식회사 | Diffusion plate having optical path control function and backlight device |
| CN111175867A (en) * | 2020-01-14 | 2020-05-19 | 深圳睿晟自动化技术有限公司 | Diffusion film and structured light projection module correction device |
| CN111240090A (en) * | 2020-01-15 | 2020-06-05 | 精电(河源)显示技术有限公司 | Optical film with uniform backlight, direct type backlight module and display device |
| CN111752045A (en) * | 2020-07-15 | 2020-10-09 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN212781321U (en) * | 2020-09-11 | 2021-03-23 | 谷麦光电科技股份有限公司 | Light guide plate and diffusion plate integrated module |
| CN113156558A (en) * | 2021-03-19 | 2021-07-23 | 苏州维旺科技有限公司 | Mini LED diffusion sheet, preparation process thereof and backlight module |
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