CN109164519B - Diffusion plate, backlight structure and display panel - Google Patents
Diffusion plate, backlight structure and display panel Download PDFInfo
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- CN109164519B CN109164519B CN201811126196.3A CN201811126196A CN109164519B CN 109164519 B CN109164519 B CN 109164519B CN 201811126196 A CN201811126196 A CN 201811126196A CN 109164519 B CN109164519 B CN 109164519B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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Abstract
The invention provides a diffusion plate, a backlight structure and a display panel, wherein the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces. The invention provides the diffusion plate with the arc-shaped curved surface and/or the smooth inclined surface to replace the traditional flat diffusion plate, so that light can be projected to the area right above the bearing table through refraction, and the dark bands at the edge of the display panel are visually reduced or even eliminated.
Description
Technical Field
The invention relates to the field of electronic display, in particular to a diffusion plate, a backlight structure and a display panel.
Background
With the development of display technology, the use of display panels has not been limited to display screens of small devices such as televisions, monitors, computer display screens, etc., but has also been increasingly applied to large-sized displays in the public domain. There is an increasing demand for large-sized, high-resolution displays for use in airports, schools, large conference sites, exhibition halls, and the like. However, the maximum production size of the current mainstream display is only about 65 inches, and the requirement of large-area display cannot be met. The requirement for larger area displays needs to be fulfilled by using tiled displays.
The tiled display requires that the display for tiling has a very narrow frame design, and the abutted seam between two adjacent displays is as small as possible, thereby realizing seamless display. In practice, there are many difficulties in narrow bezel design that need to be overcome. For example, in the backlight module design, the direct light transmission mode can cause a dark band to appear right above the carrier stage of the diffuser plate, as shown in fig. 1. Reducing the width of the susceptor reduces the width of the dark band, but cannot be eliminated. More importantly, the diffusion plate will shrink or expand in a cold or hot environment, which means that the width of the carrier cannot be decreased without limit, i.e. must be greater than a certain value, which means that dark bands inevitably appear in the display area of the backlight module.
Disclosure of Invention
The invention provides a diffusion plate, a backlight structure and a display panel, which aim to solve the problems of display dark bands caused by gaps which cannot be eliminated between a bearing table and the diffusion plate.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
a diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces.
According to an embodiment of the present invention, the diffuser plate is made of a material having a refractive index greater than 1.48 and less than 1.60.
According to a specific embodiment of the present invention, wherein the thickness of the third surface and the fourth surface is greater than or equal to one tenth of the thickness of the fifth surface and the sixth surface.
According to a specific embodiment of the present invention, a width of a projection of the first connection surface and the second connection surface on the first surface along a horizontal direction is not more than 20 mm.
Correspondingly, the invention also provides a backlight structure, which comprises a back plate, a light source positioned on the back plate, a bearing table positioned beside the light source and a diffusion plate positioned above the bearing table, wherein the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces.
According to an embodiment of the present invention, the carrier has a carrying surface along a horizontal direction, the diffuser plate is located on the carrying surface, and a distance between an edge of the diffuser plate and an edge of the carrying surface on a side away from the diffuser plate is greater than a maximum expansion dimension of the diffuser plate.
According to an embodiment of the present invention, a distance between an edge of the diffusion plate and an edge of the carrying surface located below the diffusion plate is greater than a maximum shrinkage dimension of the diffusion plate.
Correspondingly, the invention also provides a display panel, which comprises a backlight structure and a functional film layer positioned above the backlight structure, wherein the backlight structure comprises a back plate, a light source positioned on the back plate, a bearing table positioned at the side of the light source and a diffusion plate positioned above the bearing table, and the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces.
According to an embodiment of the present invention, the functional film layer comprises a polarizing film located above the diffusion plate.
According to a specific embodiment of the present invention, wherein the functional film layer comprises an incremental film over the polarizing film.
The invention has the beneficial effects that: through providing a diffuser plate that has curved surface and/or level and smooth inclined plane and replace traditional flat diffuser plate, can project light through the refraction to the region directly over the plummer to reduce or even eliminated the dark band at display panel edge in the vision, can make the concatenation display panel have better display effect, improved user experience.
Drawings
FIG. 1 is a schematic diagram of a display panel in the prior art;
FIG. 2 is a partial enlarged view of a prior art display panel;
FIGS. 3(a) and 3(b) are schematic diagrams illustrating the diffuser plate according to the present invention for eliminating the dark bands of the display panel;
FIG. 4 is a schematic structural diagram of a diffuser plate according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of the diffuser plate of FIG. 4 taken along the line A-A';
FIG. 6 is a schematic view of a diffuser plate according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of a display panel employing the diffuser plate of FIG. 4;
fig. 8 is a schematic structural view of a display panel using the diffuser plate of fig. 6.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring 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. In the drawings, elements having similar structures are denoted by the same reference numerals.
The prior art will be described first with reference to the accompanying drawings. Referring to fig. 1, the related art display panel generally includes an "L" -shaped back plate 110, a PCB 120 positioned over a portion of the back plate 110 extending in a horizontal direction, a fold-line shaped carrier table 130, a backlight 140 positioned over the PCB, a diffusion plate 150 supported by the carrier table 130, and a film 160 positioned over the diffusion plate. The carrier 130 includes a first portion and a second portion extending in a vertical direction, and a third portion extending in a horizontal direction for connecting the first portion and the second portion, and the third portion is used for placing the diffusion plate 150. Fig. 2 is a partial enlarged view of the display panel in fig. 1, wherein a length of the third portion of the carrier stage 130 is L, a length of the diffuser plate 150 disposed on the carrier stage 130 is D, and a distance between an edge of the diffuser plate 150 and the first portion of the carrier stage 130 is W. Since the carrier 130 is a non-emissive area, the optical line emitted from the backlight 140 cannot reach the carrier 130, and therefore, no matter which angle the human eye views the display, a dark band appears. Reducing the width L of the stage can mitigate the dark bands, but cannot eliminate them. More importantly, the diffuser plate will shrink or expand in hot and cold environments, resulting in a lower limit for L, i.e., it must be greater than a certain value. Therefore, the edge of the display panel in the prior art has unavoidable dark bands.
Therefore, the invention provides a diffusion plate, a backlight structure and a display panel, which are used for solving the problems of gaps which cannot be eliminated between a bearing table and the diffusion plate and display dark bands caused by the gaps. Specifically, the technical scheme provided by the invention is as follows:
a diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring first to fig. 3(a) and 3(b), fig. 3(a) and 3(b) are schematic diagrams of the diffuser plate of the present invention for eliminating the dark bands of the display panel. The edge structure of the diffusion plate 150 plays a decisive role in the propagation path of light. In the conventional diffuser plate, the included angle between the side surfaces is a right angle, and the adjacent side surfaces are perpendicular to each other, so the light path cannot reach above the susceptor 130. In the invention, the edge of the plate is set to be the arc-shaped curved surface and/or the smooth inclined surface, and the light energy outside the bearing table 130 is expanded to the upper part of the bearing table 130 through the optical correction function of the arc-shaped curved surface and/or the smooth inclined surface, so that the dark band at the edge of the display panel is reduced or eliminated.
Referring to fig. 4, fig. 4 is a schematic structural view of a diffusion plate in an embodiment of the present invention. The diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through the first connecting surface, the second surface is connected with the fourth surface through the second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces. FIG. 5 is a cross-sectional view of the diffuser plate of FIG. 4 taken along the direction A-A'. Wherein a length T0 of the third and fourth surfaces in the vertical direction is greater than or equal to one tenth of a length T of the fifth and sixth surfaces in the vertical direction. The projection of the first connecting surface and the second connecting surface on the first surface has a width D1 along the horizontal direction of not more than 20 mm.
Preferably, in this embodiment, in order to better realize the refraction of light, the diffuser plate is made of a material having a refractive index greater than 1.48 and smaller than 1.60. The transparent material can also be a material with certain haze: such as glass, quartz, PMMA, MS, PS, etc.
Referring to fig. 6, fig. 6 is a schematic structural view of a diffusion plate in another embodiment of the present invention. The diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are smooth inclined planes. Wherein a length T0 of the third and fourth surfaces in the vertical direction is greater than or equal to one tenth of a length T of the fifth and sixth surfaces in the vertical direction. The projection of the first connecting surface and the second connecting surface on the first surface has a width D1 along the horizontal direction of not more than 20 mm.
Preferably, in this embodiment, in order to better realize the refraction of light, the diffuser plate is made of a material having a refractive index greater than 1.48 and smaller than 1.60. The transparent material can also be a material with certain haze: such as glass, quartz, PMMA, MS, PS, etc.
Correspondingly, the invention also provides a backlight structure, which comprises a back plate, a light source positioned on the back plate, a bearing table positioned beside the light source and a diffusion plate positioned above the bearing table, wherein the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces.
Specifically, the bearing table is provided with a bearing surface along the horizontal direction, the diffusion plate is positioned on the bearing surface, and the distance from the edge of the diffusion plate to the edge of one side, far away from the diffusion plate, of the bearing surface is greater than the maximum expansion size of the diffusion plate. And the distance between the edge of the diffusion plate and the edge of the bearing surface below the diffusion plate is greater than the maximum contraction size of the diffusion plate.
In the conventional diffuser plate, the included angle between the side surfaces is a right angle, and the adjacent side surfaces are perpendicular to each other, so the light path cannot reach above the susceptor 130. In the invention, the edge of the plate is set to be the arc-shaped curved surface and/or the smooth inclined surface, and the light energy outside the bearing table 130 is expanded to the upper part of the bearing table 130 through the optical correction function of the arc-shaped curved surface and/or the smooth inclined surface, so that the dark band at the edge of the display panel is reduced or eliminated.
Correspondingly, the invention also provides a display panel, which comprises a backlight structure and a functional film layer positioned above the backlight structure, wherein the backlight structure comprises a back plate, a light source positioned on the back plate, a bearing table positioned at the side of the light source and a diffusion plate positioned above the bearing table, and the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc-shaped curved surfaces and/or smooth inclined surfaces.
Preferably, the functional film layer includes a polarizing film positioned above the diffusion plate.
Preferably, wherein the functional film layer comprises a brightness enhancing film over the polarizing film.
The diffuser plate used in the conventional display panel has a right angle between the side surfaces, and the adjacent side surfaces are perpendicular to each other, so the light path cannot reach the top of the carrier 130. In the invention, the edge of the plate is set to be the arc-shaped curved surface and/or the smooth inclined surface, and the light energy outside the bearing table 130 is expanded to the upper part of the bearing table 130 through the optical correction function of the arc-shaped curved surface and/or the smooth inclined surface, so that the dark band at the edge of the display panel is reduced or eliminated.
Fig. 7 is a schematic structural diagram of a display panel using the diffusion plate in fig. 4. In this embodiment, the diffuser plate 152 having the arc-shaped curved surface is used instead of the conventional diffuser plate. It can be seen that the diffuser plate with the arc-shaped curved surface can effectively transmit the light of the backlight source to the upper part of the bearing table, thereby weakening or even eliminating the dark bands visually.
Fig. 8 is a schematic structural view of a display panel using the diffuser plate of fig. 6. In this embodiment, the conventional diffuser plate is replaced with the diffuser plate 154 having a smooth inclined surface. It can be seen that the diffuser plate with smooth inclined surface can effectively transmit the light of the backlight source to the upper part of the bearing table, thereby weakening or even eliminating the dark bands visually.
The invention has the beneficial effects that: through providing a diffuser plate that has curved surface and/or level and smooth inclined plane and replace traditional flat diffuser plate, can project light through the refraction to the region directly over the plummer to reduce or even eliminated the dark band at display panel edge in the vision, can make the concatenation display panel have better display effect, improved user experience.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (9)
1. A diffusion plate is characterized in that the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc curved surfaces and/or smooth inclined surfaces; the first connecting surface and the second connecting surface are light ray emitting surfaces; the lengths of the third surface and the fourth surface in the vertical direction are greater than or equal to one-tenth of the lengths of the fifth surface and the sixth surface in the vertical direction.
2. The diffuser plate as claimed in claim 1, wherein the diffuser plate is made of a material having a refractive index greater than 1.48 and less than 1.60.
3. A diffuser plate according to claim 1, wherein the projections of the first and second connection surfaces on the first surface have a width in the horizontal direction of not more than 20 mm.
4. A backlight structure is characterized by comprising a back plate, a light source positioned on the back plate, a bearing table positioned beside the light source and a diffusion plate positioned above the bearing table, wherein the diffusion plate is of a flat structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc curved surfaces and/or smooth inclined surfaces; the lengths of the third surface and the fourth surface in the vertical direction are greater than or equal to one-tenth of the lengths of the fifth surface and the sixth surface in the vertical direction.
5. The backlight structure of claim 4, wherein the carrier platform has a supporting surface along a horizontal direction, the diffuser plate is disposed on the supporting surface, and an edge of the diffuser plate is spaced from an edge of the supporting surface on a side away from the diffuser plate by a distance greater than a maximum expansion dimension of the diffuser plate.
6. The backlight structure of claim 5, wherein the distance between the edge of the diffuser plate and the edge of the carrying surface under the diffuser plate is greater than the maximum shrinkage dimension of the diffuser plate.
7. A display panel is characterized by comprising a backlight structure and a functional film layer positioned above the backlight structure, wherein the backlight structure comprises a back plate, a light source positioned on the back plate, a bearing table positioned beside the light source and a diffusion plate positioned above the bearing table, the diffusion plate is of a flat plate-shaped structure and is provided with a first surface and a second surface along the horizontal direction; a third surface and a fourth surface along a vertical direction; and fifth and sixth surfaces along a third direction, the third direction being perpendicular to the horizontal and vertical directions; the first surface is a light incidence surface, and the second surface is positioned above the first surface and is a light emergence surface; the second surface is connected with the third surface through a first connecting surface, the second surface is connected with the fourth surface through a second connecting surface, and the first connecting surface and the second connecting surface are arc curved surfaces and/or smooth inclined surfaces; the lengths of the third surface and the fourth surface in the vertical direction are greater than or equal to one-tenth of the lengths of the fifth surface and the sixth surface in the vertical direction.
8. The display panel of claim 7, wherein the functional film layer comprises a polarizing film over the diffuser plate.
9. The display panel of claim 8, wherein the functional film layer comprises a brightness enhancement film over the polarizing film.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811126196.3A CN109164519B (en) | 2018-09-26 | 2018-09-26 | Diffusion plate, backlight structure and display panel |
| PCT/CN2019/075145 WO2020062759A1 (en) | 2018-09-26 | 2019-02-15 | Diffusion plate, backlight structure, and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811126196.3A CN109164519B (en) | 2018-09-26 | 2018-09-26 | Diffusion plate, backlight structure and display panel |
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| CN109164519A CN109164519A (en) | 2019-01-08 |
| CN109164519B true CN109164519B (en) | 2021-01-15 |
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| CN201811126196.3A Active CN109164519B (en) | 2018-09-26 | 2018-09-26 | Diffusion plate, backlight structure and display panel |
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| CN (1) | CN109164519B (en) |
| WO (1) | WO2020062759A1 (en) |
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| CN109164519B (en) * | 2018-09-26 | 2021-01-15 | 惠州市华星光电技术有限公司 | Diffusion plate, backlight structure and display panel |
| CN110095904A (en) * | 2019-05-27 | 2019-08-06 | 惠州市华星光电技术有限公司 | Down straight aphototropism mode set and liquid crystal display device |
| CN111292618B (en) * | 2020-03-26 | 2022-03-08 | 京东方科技集团股份有限公司 | Backlight module, display screen and spliced screen |
| CN113539135B (en) * | 2021-08-02 | 2023-08-01 | 宁波视睿迪光电有限公司 | Light box and display device |
| CN114743466A (en) * | 2022-04-19 | 2022-07-12 | 惠州视维新技术有限公司 | Spliced screen and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5059525B2 (en) * | 2007-09-05 | 2012-10-24 | 株式会社ジャパンディスプレイイースト | Liquid crystal display |
| CN103091899B (en) * | 2011-11-03 | 2015-09-30 | 苏州璨宇光学有限公司 | Display device and backlight module thereof |
| CN102865516B (en) * | 2012-09-28 | 2016-01-20 | 广州创维平面显示科技有限公司 | Backlight module and light-emitting diode display |
| CN102879949B (en) * | 2012-10-23 | 2015-03-04 | 深圳市华星光电技术有限公司 | Liquid crystal display module |
| CN203365863U (en) * | 2013-08-09 | 2013-12-25 | 京东方科技集团股份有限公司 | Diffusion plate, backlight module and display device |
| KR20160019601A (en) * | 2014-08-11 | 2016-02-22 | 삼성디스플레이 주식회사 | Backlight unit and display apparatus having the same |
| CN204405995U (en) * | 2014-09-12 | 2015-06-17 | 康佳集团股份有限公司 | A kind of direct-light type LED backlight module and liquid crystal display |
| JP6399237B2 (en) * | 2015-11-20 | 2018-10-03 | Ａｇｃ株式会社 | Bent substrate with film, method for manufacturing the same, and image display device |
| CN205594263U (en) * | 2016-04-18 | 2016-09-21 | 深圳Tcl新技术有限公司 | Straight following formula backlight unit and straight following formula display |
| CN106647043A (en) * | 2016-12-08 | 2017-05-10 | 环球智达科技（北京）有限公司 | Backlight structure adopting aggregate type diffusion plate |
| CN109164519B (en) * | 2018-09-26 | 2021-01-15 | 惠州市华星光电技术有限公司 | Diffusion plate, backlight structure and display panel |
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| CN109164519A (en) | 2019-01-08 |
| WO2020062759A1 (en) | 2020-04-02 |
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