CN111221173B - Backlight module and display device - Google Patents

Backlight module and display device Download PDF

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Publication number
CN111221173B
CN111221173B CN201911074138.5A CN201911074138A CN111221173B CN 111221173 B CN111221173 B CN 111221173B CN 201911074138 A CN201911074138 A CN 201911074138A CN 111221173 B CN111221173 B CN 111221173B
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CN
China
Prior art keywords
glass substrate
backlight module
optical function
function layer
prism
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Active
Application number
CN201911074138.5A
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Chinese (zh)
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CN111221173A (en
Inventor
丘永元
俞刚
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Huizhou China Star Optoelectronics Technology Co Ltd
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Huizhou China Star Optoelectronics Technology Co Ltd
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Priority to CN201911074138.5A priority Critical patent/CN111221173B/en
Priority to PCT/CN2019/127928 priority patent/WO2021088226A1/en
Publication of CN111221173A publication Critical patent/CN111221173A/en
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Publication of CN111221173B publication Critical patent/CN111221173B/en
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133512Light shielding layers, e.g. black matrix
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133608Direct backlight including particular frames or supporting means
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

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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)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention discloses a backlight module and a display device, wherein the backlight module comprises an optical function layer group and at least one optical function layer, and when the optical function layers are more than or equal to two layers, the optical function layers are arranged in a laminated manner; each optically functional layer includes a glass substrate. The backlight module and the display device have the advantages that the hard glass is used as the material of the substrate, so that the problem that the substrate expands due to heat generated by a light source of the backlight module can be effectively solved, meanwhile, the hard glass substrate can extend out of the range of the light emitting area of the backlight module to be combined with the shading material to form the supporting structure, the preparation procedures of the backlight module are further reduced, and the cost is saved.

Description

Backlight module and display device
Technical Field
The invention relates to the field of backlight, in particular to a backlight module and a display device.
Background
With the development of mobile communication products and Pad-type products, many mobile phone manufacturers attract consumers with a narrow frame as a selling point. The width of the rubber frame of the backlight module is directly related to the width of the mobile phone frame
The backlight module can be divided into a direct type and a side type. The direct type backlight module is characterized in that a light source is arranged below a liquid crystal panel and forms a uniform surface light source through optical film components such as a diffusion film, and the direct type backlight module is high in brightness, good in uniformity and large in thickness. The side-in type backlight module is characterized in that a backlight source is arranged on the side face of a light guide plate, light rays emitted by a light source enter the light guide plate from the side face, namely a light incoming face, are emitted from a light outgoing face after being subjected to total reflection and scattering of bottom surface mesh points, and then pass through an optical film assembly to form a surface light source. The side-in type backlight module is small in thickness and easy to thin and light.
With the vigorous demand of narrow frame (UNB) and the continuous thinning in recent years, the demand of no frame (Bezel less) and the like, the traditional plastic optical material can not meet the product demand. The current optical film is Polyethylene terephthalate (PET substrate for short), the light guide plate is polymethyl methacrylate (PMMA for short), and these plastic materials expand when heated. In narrow frame module scheme, the marginal headspace is not enough, and the inflation of plastic material finally converts the module quality problem into: the membrane breaks and the sheet bulges or even separates the panel from the frame.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a backlight module and a display device to solve the problem in the prior art that the plastic substrate of the backlight module is easily expanded by heating, which easily causes poor display of the display device.
The technical scheme for solving the technical problems is as follows: the invention provides a backlight module, which comprises at least one optical functional layer, wherein when the optical functional layer is more than or equal to two layers, the optical functional layer is arranged in a laminated manner; each optically functional layer includes a glass substrate.
Further, the optical function layer group also comprises a first optical function layer which comprises a first glass substrate; the first prism structure is arranged on the second optical function layer on the first glass substrate, comprises a second glass substrate and is arranged on the first prism structure; the second prism structure is arranged on the second glass substrate; a third optical function layer comprising a third glass substrate disposed on the second prism structure; and the diffusion structure is arranged on the third glass substrate.
Further, the first prism structure comprises a plurality of vertical prisms, and the ridge line direction of the vertical prisms is perpendicular to the first glass substrate; the second prism structure comprises at least one horizontal prism, and the edge line direction of the horizontal prism is parallel to the second glass substrate.
Further, the backlight module comprises a display area, a non-display area and a light-shielding frame glue, wherein the light-shielding frame glue is arranged in the non-display area and fills a gap between the adjacent glass substrates.
The LED lamp panel is arranged in the display area and is positioned on one side, away from the first prism structure, of the first glass substrate, and a plurality of LED lamp beads are arranged on one side, close to the optical function layer group, of the LED lamp panel; and the light shielding layer is arranged on one side of the optical function layer set far away from the LED lamp panel.
The support structure is arranged on two sides of the backlight module and comprises a support body formed by extending the first glass substrate, the second glass substrate and the third glass substrate towards the non-display area; the shading frame glue fills gaps between adjacent glass substrates in the supporting body and wraps the supporting body.
The light guide plate is arranged on one side of the first glass substrate, which is far away from the first prism structure; and the shading layer is arranged on one side of the light guide plate, which is far away from the first glass substrate.
The support structure is arranged on one side of the backlight module and comprises a support body formed by extending the first glass substrate, the second glass substrate and the third glass substrate to one side of the backlight module; the shading frame glue fills gaps between adjacent glass substrates in the supporting body and wraps the supporting body.
The invention also provides a display device comprising the backlight module.
Furthermore, the display panel is arranged on the optical function layer group.
The invention has the advantages that: the backlight module and the display device adopt the hard glass as the material of the substrate, can effectively prevent the problem that the substrate expands due to the heat generated by the light source of the backlight module, and simultaneously, the hard glass substrate can extend out of the light emitting area of the backlight module to be combined with the shading material to form the supporting structure, thereby further reducing the preparation procedures of the backlight module and saving the cost.
Drawings
The invention is further explained below with reference to the figures and examples.
Fig. 1 is a schematic view of a backlight module in embodiment 1.
Fig. 2 is a schematic view of a display device in embodiment 1.
Fig. 3 is a schematic view of a backlight module in embodiment 2.
In the drawings
10. 11 a backlight module; 101 a display area;
102 a non-display area; a 110LED lamp panel;
120 groups of optically functional layers; 130 a light-shielding layer;
140 a support structure; 150 light-shielding frame glue;
121 a first optically functional layer; 122 a second optically functional layer;
123 a third optically functional layer; 1211 a first glass substrate;
1212 a first prismatic structure; 1221 a second glass substrate;
1222 a second prismatic structure; 1231 a third glass substrate;
a 1232 diffusion structure; 141 a support body;
111 side light source; 112 a light guide plate;
142 a foot rest structure; 1 a display device;
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
Example 1
In this embodiment, the backlight module 10 of the present invention includes a display area 101 and a non-display area 102 surrounding the display area 101.
As shown in fig. 1, the backlight module 10 includes an LED lamp panel 110, an optical functional layer group 120, a light shielding layer 130, and a support structure 140.
The optical function layer group 120 includes a first optical function layer 121, a second optical function layer 122, and a third optical function layer 123.
The first optical function layer 121 includes a first glass substrate 1211 and a first prism structure 1212 disposed on the first glass substrate 1211, where the first prism structure 1212 includes a plurality of prism units, and the direction of the edge line of the prism units is perpendicular to the first glass substrate 1211, and the first optical function layer 121 diffuses a single light ray emitted from a light source into a soft surface light source through the plurality of vertically disposed prism structures, so as to improve the display quality of the display panel.
The second optical function layer 122 includes a second glass substrate 1221 and a second prism structure 1222 disposed on the second glass substrate 1221, the second prism structure 1222 is a triangular prism, a ridge line direction of the triangular prism is parallel to the second glass substrate 1221, one of the ridge surfaces of the second prism structure 1222 is attached to the second glass substrate 1221, and the second optical function layer 122 achieves a light-gathering purpose through the prism structure disposed horizontally, so as to enhance brightness of the display panel.
The third optical function layer 123 includes a third glass substrate 1231 and a diffusion structure 1232 disposed on the third glass substrate 1231, where the diffusion structure 1232 includes a plurality of diffusion particles, the diffusion particles are uniformly distributed on the third glass substrate 1231, and the light is refracted and scattered through the diffusion particles, so that the light is modified to form a uniform surface light source, thereby achieving an optical diffusion effect.
The substrates of the first optical function layer 121, the second optical function layer 122 and the third optical function layer 123 are all glass substrates, so that the quality problem of the backlight module 10 caused by the expansion phenomenon in the heating process is avoided.
The LED lamp panel 110 is the light source of the backlight module 10, which is arranged in the display area 101, a plurality of LED lamp beads are uniformly distributed on the LED lamp panel 110, and therefore light rays are emitted by the LED lamp beads to provide light energy required by display images of the display panel.
In this embodiment, the backlight module 10 is a direct-type backlight module, and the LED lamp panel 110 and one surface of the first glass substrate 1211 of the first optical function layer 121, which is far away from the first prism structure 1212, are combined in a full-lamination manner, so that the thickness of the backlight module 10 is effectively reduced, and the formation of a narrow frame is facilitated.
In order to prevent the backlight module 10 from leaking light, thereby causing display abnormity, in this embodiment, the light shielding layer 130 is located the LED lamp panel 110 is far away from the first optical function layer 121 side, so as to prevent light emitted by the LED lamp panel 110 from overflowing from the edge of the backlight module 10, thereby causing the light leakage problem and affecting the display quality.
In this embodiment, the optical function layer group 120 uses glass as a substrate material, and the glass has not only good anti-expansion performance but also certain hardness, so in this embodiment, the first glass substrate 1211, the second glass substrate 1221, and the third glass substrate 1231 extend into the non-display region 102 to serve as a main structure of the support structure 140.
The supporting structure 140 is disposed in the non-display region 102 for supporting the backlight module 10, and the supporting structure 140 includes a supporting body 141.
The support body 141 is formed by extending the first glass substrate 1211, the second glass substrate 1221 and the third glass substrate 1231 to the non-display region 102, in this embodiment, the extending direction of the first glass substrate 1211, the second glass substrate 1221 and the third glass substrate 1231 is a side direction of the backlight module 10, and in other preferred embodiments of the present invention, the extending direction of the first glass substrate 1211, the second glass substrate 1221 and the third glass substrate 1231 is two side directions of the backlight module 10.
The light-shielding frame glue 150 fills a gap between adjacent glass substrates in the non-display region 102, specifically, the light-shielding frame glue 150 fills a gap between the first glass substrate 1211 and the second glass substrate 1221 and a gap between the second glass substrate 1221 and the third glass substrate 1231 in the non-display region 102, and the light-shielding frame glue 150 wraps the outer contour of the support structure 140 from the edges of the two sides of the light-shielding layer 130, so that light in the display region 101 is prevented from overflowing from the gap between the adjacent glass substrates, and a light leakage phenomenon is prevented.
As shown in fig. 2, in the present embodiment, the display device 1 of the invention includes the backlight module 10, and further includes a display panel 20, wherein the display panel 20 is disposed on a side of the third glass substrate 123 far from the second glass substrate 122, and a gap between the display panel 20 and the third glass substrate 123 is also filled with the light-shielding sealant 150.
Example 2
As shown in fig. 3, the structure of the backlight module 11 in this embodiment is substantially similar to that of the backlight module 10 in embodiment 1, except that the backlight module 11 in this embodiment employs a lateral light source, the backlight module 11 in this embodiment employs a lateral light source 111 and a light guide plate 112 as light sources, since the light guide plate 112 has a certain thickness, in order to better achieve the effect of supporting the backlight module 11, in this embodiment, the support structure 140 includes a support body 141, the support body 141 is formed by extending the first glass substrate 1211, the second glass substrate 1221 and the third glass substrate 1231 to the non-display region 102, and a foot rest structure 142 is disposed on a side of the first glass substrate 1211 away from the second glass substrate 1221, and the height of the foot rest structure 142 is the same as the height of the light guide plate 112.
The light-shielding frame glue 150 fills the gap between the adjacent glass substrates in the non-display region 102 and the gap between the foot stand structure 1142 and the first glass substrate 1211, and the light-shielding frame glue 150 wraps the outer contour of the support structure 140 from the edges of the two sides of the light-shielding layer 130, so that light in the display region 101 is prevented from overflowing from the gap between the adjacent glass substrates, and the light leakage phenomenon is prevented.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A backlight module is characterized by comprising
The optical function layer group is provided with at least one optical function layer, and when the optical function layers are more than or equal to two layers, the optical function layers are arranged in a laminated mode;
each optical function layer comprises a glass substrate;
the optical function layer group also comprises
A first optically functional layer comprising
A first glass substrate;
the first prism structure is arranged on the first glass substrate;
a second optically functional layer comprising
The second glass substrate is arranged on the first prism structure;
the second prism structure is arranged on the second glass substrate;
a third optically functional layer comprising
A third glass substrate disposed on the second prism structure;
and the diffusion structure is arranged on the third glass substrate.
2. The backlight module according to claim 1,
the first prism structure comprises a plurality of vertical prisms, and the edge line direction of the vertical prisms is vertical to the first glass substrate;
the second prism structure comprises at least one horizontal prism, and the edge line direction of the horizontal prism is parallel to the second glass substrate.
3. The backlight module according to claim 1, wherein the backlight module comprises a display region and a non-display region, and further comprising
And the shading frame glue is arranged in the non-display area and fills the gap between the adjacent glass substrates.
4. The backlight module of claim 3, further comprising
The LED lamp panel is arranged in the display area and is positioned on one side, away from the first prism structure, of the first glass substrate, wherein a plurality of LED lamp beads are arranged on one side, close to the optical function layer group, of the LED lamp panel;
and the light shielding layer is arranged on one side of the optical function layer set far away from the LED lamp panel.
5. The backlight module of claim 4, further comprising
A support structure arranged at two sides of the backlight module, the support structure comprises
A support body formed by extending the first glass substrate, the second glass substrate and the third glass substrate toward the non-display region; the shading frame glue fills gaps between adjacent glass substrates in the supporting body and wraps the supporting body.
6. The backlight module of claim 3, further comprising
The light guide plate is arranged on one side, far away from the first prism structure, of the first glass substrate;
and the shading layer is arranged on one side of the light guide plate, which is far away from the first glass substrate.
7. The backlight module of claim 6, further comprising
A support structure arranged on one side of the backlight module, the support structure comprising
The support body is formed by extending the first glass substrate, the second glass substrate and the third glass substrate to one side of the backlight module; the shading frame glue fills gaps between adjacent glass substrates in the supporting body and wraps the supporting body.
8. A display device comprising a backlight module according to any one of claims 1 to 7.
9. The display device according to claim 8, further comprising
And the display panel is arranged on the optical function layer group.
CN201911074138.5A 2019-11-06 2019-11-06 Backlight module and display device Active CN111221173B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201911074138.5A CN111221173B (en) 2019-11-06 2019-11-06 Backlight module and display device
PCT/CN2019/127928 WO2021088226A1 (en) 2019-11-06 2019-12-24 Backlight module and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911074138.5A CN111221173B (en) 2019-11-06 2019-11-06 Backlight module and display device

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CN111221173B true CN111221173B (en) 2021-07-06

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CN115951516A (en) * 2022-12-08 2023-04-11 业成科技(成都)有限公司 Backlight module and display device

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Publication number Priority date Publication date Assignee Title
CN1591129A (en) * 2003-09-01 2005-03-09 友达光电股份有限公司 Supporting diffusion plate
CN101375184A (en) * 2006-01-24 2009-02-25 木本股份有限公司 Optical film and backlight unit making use of the same
CN102007524A (en) * 2008-04-17 2011-04-06 旭硝子株式会社 Glass laminate, display panel with support, method for producing glass laminate and method for manufacturing display panel with support
CN104793399A (en) * 2015-05-05 2015-07-22 京东方科技集团股份有限公司 Display device and preparation method thereof
CN110383123A (en) * 2017-03-06 2019-10-25 3M创新有限公司 High contrast optics film and equipment including the optical film
CN107942580A (en) * 2017-11-15 2018-04-20 武汉华星光电技术有限公司 Ultra-narrow frame backlight module and display device

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WO2021088226A1 (en) 2021-05-14

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