Light guide plate, light source assembly, display panel and display device

Patent metadata

Field	Value
Publication number	US-10976594-B2
Application number	US-201916394258-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Apr 28, 2018
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A light guide plate, a light source assembly, a display panel and a display device are provided. The light guide plate includes a light-emitting surface, a bottom surface opposite to the light-emitting surface and a light-entering surface intersecting with the light-emitting surface and the bottom surface; at least one of the light-emitting surface of the light guide plate and the bottom surface of the light guide plate includes a horizontal portion and an inclined portion protruding out of a plane where the horizontal portion is located along a direction away from both of the light-emitting surface and the bottom surface; the inclined portion is at an end, which is close to the light-entering surface, of the light guide plate, and the inclined portion has an included angle with respect to the horizontal portion.

First claim

What is claimed is:

1. A light guide plate, comprising: a light-emitting surface, a bottom surface opposite to the light-emitting surface and a light-entering surface intersecting with the light-emitting surface and the bottom surface, wherein,
the light-emitting surface comprises a first horizontal portion and a first inclined portion protruding out of a plane where the first horizontal portion is located along a direction away from both of the light-emitting surface and the bottom surface; the bottom surface comprises a second horizontal portion and a second inclined portion protruding out of a plane where the second horizontal portion is located along a direction away from both of the light-emitting surface and the bottom surface; and the second horizontal portion of the bottom surface is parallel to the first horizontal portion of the light-emitting surface; the first inclined portion has a first included angle with respect to the first horizontal portion, and the second inclined portion has a second included angle with respect to the second horizontal portion;
both the first inclined portion and the second inclined portion are at an end, which is close to the light-entering surface, of the light guide plate;
no horizontal portion is between the first inclined portion and the light-entering surface, and no horizontal portion is between the second inclined portion and the light-entering surface.

2. The light guide plate according to claim 1 , wherein, the second inclined portion of the bottom surface comprises one second inclined surface, and the second inclined surface has the second included angle with respect to the horizontal portion of the bottom surface.

3. The light guide plate according to claim 1 , wherein, the second inclined portion of the bottom surface comprises a plurality of serrated structures, and each of the plurality of serrated structures comprises one second inclined surface;
the second included angles respectively between the second inclined surfaces of the plurality of serrated structures and the second horizontal portion of the bottom surface of the light guide plate are same with each other.

4. The light guide plate according to claim 1 , wherein, the second inclined portion of the bottom surface comprises a plurality of serrated structures, and each of the plurality of serrated structures comprises one second inclined surface; and
along a direction from a position close to the light-entering surface of the light guide plate to a position away from the light-entering surface of the light guide plate, the second included angles respectively between the second inclined surfaces of the plurality of serrated structures and the second horizontal portion of the bottom surface increase gradually.

5. The light guide plate according to claim 1 , wherein, the first inclined portion of the light-emitting surface comprises one first inclined surface, and the first inclined surface has the first included angel with respect to the first horizontal portion of the light-emitting surface.

6. The light guide plate according to claim 1 , wherein, the first inclined portion of the light-emitting surface comprises a plurality of serrated structures, and each of the plurality of serrated structures comprises one first inclined surface;
the first included angles respectively between the first inclined surfaces of the plurality of serrated structures and the first horizontal portion of the light-emitting surface are same with each other.

7. The light guide plate according to claim 1 , wherein, the first inclined portion of the light-emitting surface comprises a plurality of serrated structures, and each of the plurality of serrated structures comprises one first inclined surface;
along a direction from a position close to the light-entering surface of the light guide plate to a position away from the light-entering surface of the light guide plate, the first included angles respectively between the first inclined surfaces of the plurality of serrated structures and the first horizontal portion of the light-emitting surface of the light guide plate increase gradually.

8. The light guide plate according to claim 1 , wherein, a value of the first included angle is 1°˜3°, and a value of the second included angle is 1°˜3°.

9. The light guide plate according to claim 1 , wherein, a length, along a direction from a position close to the light-entering surface of the light guide plate to a position away from the light-entering surface of the light guide plate, of the first inclined surface is greater than 100 μm, and a length, along the direction from a position close to the light-entering surface of the light guide plate to a position away from the light-entering surface of the light guide plate, of the second inclined surface is greater than 100 μm.

10. The light guide plate according to claim 1 , wherein, along a direction from a position close to the light-entering surface of the light guide plate to a position away from the light-entering surface of the light guide plate, a vertical distance between the first inclined portion and the plane where the first horizontal portion is located decrease gradually, and a vertical distance between the second inclined portion and the plane where the second horizontal portion is located decrease gradually.

11. The light guide plate according to claim 1 , wherein, the first horizontal portion is at a side, which is away from the light-entering surface of the light guide plate, of the first inclined portion, and the second horizontal portion is at a side, which is away from the light-entering surface of the light guide plate, of the second inclined portion.

12. A light source assembly, comprising the light guide plate according to claim 1 .

13. The light source assembly according to claim 12 , further comprising:
a light-emitting portion, facing the light-entering surface of the light guide plate so that light emitted by the light-emitting portion enters the light-entering surface of the light guide plate, wherein,
the first inclined portion of the light guide plate is at a side, which is close to the light-emitting portion, of the first horizontal portion of the light guide plate, and the second inclined portion of the light guide plate is at a side, which is close to the light-emitting portion, of the second horizontal portion of the light guide plate.

14. The light source assembly according to claim 13 , wherein,
the light-emitting portion comprises a base and a light-emitting element, the light-emitting element is fixed on the base, a portion of the base covers an end, which is close to the light-emitting portion, of the light-emitting surface of the light guide plate, and the base is lightproof.

15. A display panel, comprising the light source assembly according to claim 10 .

16. The display panel according to claim 15 , further comprising a display region, wherein, both the first inclined portion and the second inclined portion of the light guide plate do not overlap the display region in a direction perpendicular to the horizontal portion of the light guide plate.

17. A display device, comprising the display panel according to claim 13 .

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Ma Junjie
• Wang Zhen
• Sang Jian
• Sun Haiwei
• Fu Mang
• Zhang Gongtao
• Zhang Shubai
• Ding Jianbiao
• Li Zhonghua

Classifications

• G02F1/133524 Primary

  Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides · CPC title

• G02B6/0045 Primary

  by shaping at least a portion of the light guide · CPC title

• G02B6/002 Primary

  by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces · CPC title

• G02B6/0031

  Reflecting element, sheet or layer · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title