Display backlight module having light guide plate with through hole and embedded optic fibers

Patent metadata

Field	Value
Publication number	US-11086067-B2
Application number	US-201916643211-A
Country	US
Kind code	B2
Filing date	Sep 17, 2019
Priority date	Nov 19, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A light guide plate includes a through hole; at least one light transmitting component disposed within the light guide plate; at least one light incident surface; at least one light source; and at least one lens structure located between the light source and the incident surface. The light transmitting component is configured to transmit a portion of light that enters the light incident surface to a first region of the light guide plate that would otherwise be masked by the through hole. The light guide plate might backlight a display panel. A method for manufacturing the light guide plate is also provided.

First claim

What is claimed is:

1. A light guide plate, comprising:
a light guide plate body having at least one light incident surface;
at least one light transmitting component disposed in the light guide plate body, the at least one light transmitting component configured to transmit a portion of light from the light incident surface to a first region of the light guide plate body; and
at least one first via hole,
wherein the first region is located at a side of the at least one first via hole facing away from the light incident surface.

2. The light guide plate according to claim 1 , wherein the light transmitting component includes at least one optical fiber; each optical fiber comprises:
a first end configured to receive a portion of light from the light incident surface, and
a second end configured to output light received by the first end.

3. The light guide plate according to claim 1 , wherein the light transmitting component comprises:
a first configured to receive the portion of light from the light incident surface; and
a second end located proximate the first region and configured to output the portion of light received by the first end towards the first region.

4. The light guide plate according to claim 3 , further comprising:
at least one lens structure disposed on the light incident surface of the light guide plate body,
wherein each lens structure is configured to converge at least a portion of the light that enters the light guide plate body to a position substantially at the first ends of one or more light transmitting components.

5. The light guide plate according to claim 3 , further comprising at least one channel provided in the light guide plate body, and each channel is provided with at least one light transmitting component therein.

6. The light guide plate according to claim 3 , wherein at least one of light transmitting components is arranged at an edge of the light guide plate body.

7. The light guide plate according to claim 2 , wherein the optical fiber includes an inner core; and a cladding covering an outer surface of the inner core; and
a refractive index of the inner core and a refractive index of the cladding are both greater than a refractive index of the light guide plate body.

8. The light guide plate according to claim 2 , further comprising:
at least one light reflecting member disposed on a side face of the light guide plate body and proximate the second end of the optical fiber,
wherein the light reflecting member is configured to reflect light emitted from the second end of the optical fiber to the first region.

9. The light guide plate according to claim 8 , wherein each light reflecting member includes a metal layer.

10. The light guide plate according to claim 8 , wherein the at least one light reflecting member includes a plurality of light reflecting members, the at least one light transmitting component includes a plurality of light transmitting components, and a number of optical fibers corresponding to each light reflecting member is equal.

11. A backlight module, comprising:
the light guide plate according to claim 1 ; and
at least one light, source disposed at the at least one light incident surface of the light guide plate body of the light guide plate, and the at least one light source is configured to provide light for the light guide plate body.

12. The backlight module according to claim 11 ; wherein the light guide plate includes at least one lens structure, the at least one lens structure is located between the at least one light source and the at least one light incident surface of the light guide plate body.

13. The backlight module according to claim 11 , wherein the light guide plate includes at least one light reflecting member and the light guide plate body has at least one first via hole, a light reflecting member is disposed on an extension line of a connection line between a light source and a first via hole; is disposed at a side of the first via hole facing away from the light source, and is disposed on a side face of the light guide plate body away from the at least one light incident surface.

14. The backlight module according to claim 13 , wherein the light guide plate has one first via hole, the backlight module includes at least two light sources, the light guide plate includes at least two light reflecting members, and the at least two light reflecting members are respectively disposed on extension lines of connection lines between the at least two light sources and the first via hole, and is disposed on the side face of the light guide plate body away from the at least one light incident surface.

15. The backlight module according to claim 11 , wherein the light guide plate has at least one first via hole, the backlight module further comprises:
a back plate, wherein the light guide plate and the at least one light source are disposed on the back plate;
an outer plastic frame disposed outside the light guide plate and the at least one light source in a direction perpendicular to a thickness of the back plate and disposed on the back plate; and
at least one inner plastic frame disposed in the at least one first via hole in one-to-one correspondence, wherein each inner plastic frame has a second via hole.

16. The backlight module according to claim 15 , further comprising:
a light-shielding adhesive disposed at a side of the inner plastic frame and the outer plastic frame facing away from the back plate, wherein the light-shielding adhesive has an opening and at least one third via hole, an orthographic projection of the opening on the back plate is within an orthographic projection of the light guide plate body on the back plate, and the at least one third via hole is communicated with at least one second via hole in one-to-one correspondence; and
an optical film layer disposed between the light-shielding adhesive and the light guide plate, wherein the optical film layer includes at least one of a diffusion plate, a lower prism sheet, or an upper prism sheet that are sequentially stacked in a direction of a thickness of the light guide plate; and the optical film layer has at least one fourth via hole, and the at least one fourth via hole is communicated with at least one second via hole in one-to-one correspondence.

17. A display device, comprising:
the backlight module according to claim 15 ; and
a display panel disposed on a light exit side of the backlight module, wherein the display panel has at least one fifth via hole, and the at least one fifth via hole is communicated with at least one second via hole in one-to-one correspondence.

18. A terminal, comprising the display device according to claim 17 , wherein one of the at least one fifth via hole is provided with a rotating shaft therein.

19. A method for manufacturing a light guide plate, comprising:
forming a first body layer including at least one first through hole, wherein a main surface of the first body layer has at least one first groove;
placing at least one light transmitting component in each first groove; and
forming a second body layer including at least one second through hole on a side of the first body layer on which the at least one light transmitting component has been placed,
wherein a main surface of the second body layer facing the first body layer has at least one second groove, and the at least one first groove is matched with the at least one second groove in one-to-one correspondence;
forming at least one first via hole b communicating the at least one fi

Assignees

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

Inventors

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

Classifications

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• G02B6/04

  formed by bundles of fibres (G02B6/24 takes precedence) · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B6/0008

  the light being emitted at the end of the fibre · CPC title

• G02B6/0013 Primary

  Means for improving the coupling-in of light from the light source into the light guide (coupling light into light guides in general G02B6/42) · CPC title