Light guide assembly, light source module and display device

Patent metadata

Field	Value
Publication number	US-11567362-B2
Application number	US-201916955935-A
Country	US
Kind code	B2
Filing date	Aug 2, 2019
Priority date	Aug 2, 2019
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A light guide assembly includes a light guide plate and a light guide strip around the periphery of the light guide plate, where a plurality of light-transmitting holes are formed on one side of the light guide strip facing to the light guide plate, and at least one end of the light guide strip is an light incident side. The light is incident to the inside of the light guide strip from the light incident side, and then is incident into the light guide plate from the light-transmitting holes on the side of the light guide strip, and thus becomes a surface light source.

First claim

What is claimed is:

1. A light guide assembly, comprising:
a light guide plate; and
a light guide strip being around a periphery of the light guide plate and having a first end and a second end, a plurality of light-transmitting holes being formed on one side of the light guide strip facing to the light guide plate;
wherein at least one of the first end and the second end is a light incident side;
the light guide strip is annular, and a shape of the light guide strip is the same as a shape of the periphery of the light guide plate;
the light guide strip comprises:
a light-transmitting part having a light-transmitting medium; and
a reflective layer wrapping the light-transmitting part;
wherein a plurality of the light-transmitting holes comprise a plurality of first light-transmitting holes on one side of the reflective layer facing to the light guide plate, and the first light-transmitting holes have light-transmitting mediums; and

the light guide strip further comprises:
a protective layer wrapping the reflective layer;
wherein a plurality of the light-transmitting holes further comprise a plurality of second light-transmitting holes on one side of the protective layer facing to the light guide plate, and the second light-transmitting holes have light-transmitting mediums; and a projection of each of the first light-transmitting holes and a projection of one of the second light-transmitting holes in a radial direction of the light guide strip overlap.

2. The light guide assembly according to claim 1 , wherein the first end of the light guide strip is a light incident side, wherein:
a plurality of the first light-transmitting holes are equally spaced in a light transmission direction of the light guide strip, and sectional areas of a plurality of the first light-transmitting holes in a direction parallel to the periphery of the light guide plate gradually increase in a direction away from the first end; or
the sectional areas of a plurality of the first light-transmitting holes in a direction parallel to the periphery of the light guide plate are equal, and a distance between the first light-transmitting holes adjacent to each other in a light transmission direction of the light guide strip gradually decreases in a direction away from the first end.

3. The light guide assembly according to claim 1 , wherein both the first end and the second end of the light guide strip are light incident sides, wherein:
a plurality of the first light-transmitting holes are equally spaced in a light transmission direction of the light guide strip, and sectional areas of the first light-transmitting holes in a direction parallel to a periphery of the light guide plate gradually increase in a direction toward a middle point of the light guide strip; or
the sectional areas of a plurality of the first light-transmitting holes in a direction parallel to the periphery of the light guide plate are equal, and a distance between the first light-transmitting holes adjacent to each other in a light transmission direction of the light guide strip gradually decreases in a direction toward the middle point of the light guide strip.

4. The light guide assembly according to claim 1 , wherein the light-transmitting medium of the light-transmitting part is a gas medium or a solid medium, the light-transmitting mediums of the first light-transmitting holes are gas mediums or solid mediums, and the light-transmitting mediums of the second light-transmitting holes are gas mediums or solid mediums.

5. The light guide assembly according to claim 1 , wherein the light-transmitting mediums of the light-transmitting part, the first light-transmitting holes, and the second light-transmitting holes are the same solid medium.

6. The light guide assembly according to claim 1 , wherein the first light-transmitting holes and the second light-transmitting holes are strip-shaped holes, and an extension direction of a length of the strip-shaped hole is perpendicular to a plane of the light guide plate.

7. The light guide assembly according to claim 1 , wherein there are zig-zag notches on the surface of the light guide plate facing to the light guide strip, and an extension direction of the zig-zag notches is perpendicular to a plane of the light guide plate.

8. The light guide assembly according to claim 1 , wherein the light-transmitting mediums of the light-transmitting part, the first light-transmitting holes, and the second light-transmitting holes are solid mediums, the light-transmitting mediums of the second light-transmitting holes have zig-zag notches on the surface close to one side of the light guide plate, and an extension direction of the zig-zag notches is perpendicular to a plane of the light guide plate.

9. The light guide assembly according to claim 1 , wherein the light-transmitting mediums of the light-transmitting part, the first light-transmitting holes, and the second light-transmitting holes are solid mediums, the light-transmitting mediums of the second light-transmitting holes have zig-zag notches on the surface close to one side of the light guide plate, the surface of the light guide plate facing to the light guide strip also has zig-zag notches, an extension direction of the zig-zag notches is perpendicular to a plane of the light guide plate, and the zig-zag notches of the second light-transmitting holes and the zig-zag notches of the light guide plate are opposite to one another in a concave-convex manner.

10. The light guide assembly according to claim 1 , wherein a side of the light guide strip facing to one side of the light guide plate is a plane and closely attaches to a side wall of the light guide plate.

11. The light guide assembly according to claim 1 , wherein the light guide plate has a through hole.

12. A light source module, comprising:
a light source; and
a light guide assembly, comprising:
a light guide plate; and
a light guide strip positioned around a periphery of the light guide plate and having a first end and a second end, a plurality of light-transmitting holes being formed on one side of the light guide strip facing to the light guide plate; wherein:
at least one of the first end and the second end is a light incident side;
the light guide strip is annular, and a shape of the light guide strip is the same as a shape of the periphery of the light guide plate;
the light guide strip comprises:
a light-transmitting part having a light-transmitting medium; and
a reflective layer wrapping the light-transmitting part;
wherein a plurality of the light-transmitting holes comprise a plurality of first light-transmitting holes on one side of the reflective layer facing to the light guide plate, and the first light-transmitting holes have light-transmitting mediums;

the light guide strip further comprises:
a protective layer wrapping the reflective layer;
wherein a plurality of the light-transmitting holes further comprise a plurality of second light-transmitting holes on one side of the protective layer facing to the light guide plate, and the second light-transmitting holes have light-transmitting mediums; and a projection of each of the first light-transmitting holes and a projection of one of the second light-transmitting holes in a radial direction of the light guide strip overlap;

the light source is on at least one end of the light guide strip; and
a light-emitting direction of the light source faces the light guide strip.

13. A display device, comprising:
a display panel; and
a light source module comprising a light source and a light guide assembly, wherein the light guide assembly comprises:
a light guide plate; and
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Assignees

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

Inventors

• Du Jingjun
• Sun Lingyu
• Chen Xiuyun
• Liang Fei
• Fang Liyu
• Hou Tingxiu
• Zhong Peng

Classifications

• G02F1/1336 Primary

  Illuminating devices · CPC title

• G02B6/0031

  Reflecting element, sheet or layer · CPC title

• G02B6/0028

  Light guide, e.g. taper · CPC title

• G02F1/133615 Primary

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• F21V13/00

  Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00 (controlling the distribution of the light emitted by adjustment of elements F21V14/00) · CPC title