Production method of backlight plate, backlight plate, and backlight module

Patent metadata

Field	Value
Publication number	US-11892674-B2
Application number	US-202117621716-A
Country	US
Kind code	B2
Filing date	Dec 10, 2021
Priority date	Nov 29, 2021
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A production method of a backlight plate, a backlight plate and a backlight module are provided. The method includes providing a light-transmitting substrate which comprises a first area and a second area, forming a pad on the light-transmitting underlay substrate corresponding to the first area, coating a layer of photosensitive material on the light-transmitting substrate and the pad to form a reflective layer, exposing a position of the second area at opposite sides of the light-transmitting substrate that the reflective layer corresponds to, and developing the reflective layer to form a groove for exposing the pad on the first area that the reflective layer corresponds to. The present disclosure ensures the stability of the reflective layer and enhances the overall reflectance of the backlight plate.

First claim

What is claimed is:

1. A production method of a backlight plate, comprising:
providing a light-transmitting underlay substrate which comprises a first area and a second area, wherein the light transmission of the first area of the light-transmitting underlay substrate is less than that of the second area of the light-transmitting underlay substrate;
forming a pad on the light-transmitting underlay substrate corresponding to the first area;
coating a layer of photosensitive material on the light-transmitting underlay substrate and the pad to form a reflective layer;
exposing a position of the second area at opposite sides of the light-transmitting underlay substrate that the reflective layer corresponds to; and
developing the reflective layer to form a groove for exposing the pad on the first area that the reflective layer corresponds to.

2. The production method according to claim 1 , wherein the exposing the position of the second area at the opposite sides of the light-transmitting underlay substrate that the reflective layer corresponds to comprises:
exposing, with a first exposure intensity, a position of the reflective layer corresponding to the second area away from the light-transmitting underlay substrate;
exposing, with a second exposure intensity greater than the first exposure intensity, an area of the light-transmitting underlay substrate that the reflective layer corresponds to the second area away from the reflective layer.

3. The production method according to claim 2 , wherein the first exposure intensity is greater than or equal to 300 milli Joule (mJ); the first exposure intensity is less than or equal to 800 mJ; and/or
the second exposure intensity is greater than or equal to 300 mJ; the second exposure intensity is less than or equal to 800 mJ.

4. The production method according to claim 1 , wherein the exposing the position of the second area at the opposite sides of the light-transmitting underlay substrate that the reflective layer corresponds to comprises blocks of:
exposing a position of the reflective layer corresponding to the second area away from the light-transmitting underlay substrate for a first predetermined duration;
exposing an area of the light-transmitting underlay substrate that the reflective layer corresponds to the second area away from the reflective layer for a second predetermined duration; the second predetermined duration being greater than the first predetermined duration.

5. The production method according to claim 1 , wherein the exposing a position of the second area at opposite sides of the light-transmitting underlay substrate that the reflective layer corresponds to comprises blocks of:
exposing a position on the second area that the reflective layer corresponds to while the area on the second area that one side of the reflective layer away from the light-transmitting underlay substrate corresponds to and the area on the second area that the reflective layer away from one side of the light-transmitting underlay substrate corresponds to are exposed.

6. The production method according to claim 1 , wherein the providing the light-transmitting underlay substrate comprises blocks of:
providing a light-transmitting substrate;
disposing a light-shielding layer on a side of a light-shielding area of the light-transmitting substrate to form the light-transmitting underlay substrate; the light-shielding area being defined as a first area; or
disposing the light-shielding layer at opposite sides of the light-shielding area of the light-transmitting substrate to form the light-transmitting underlay substrate; the light-shielding area being defined as the first area.

7. The production method according to claim 1 , wherein the forming the pad on the light-transmitting underlay substrate corresponding to the first area comprises blocks of:
forming a metal layer on the light-transmitting underlay substrate;
etching a position of the second area that the metal layer corresponds to form the pad on a position of the first area that the light-transmitting underlay substrate corresponds to.

8. The production method according to claim 1 , wherein the thickness of the reflective layer is less than or equal to 70 micrometers

9. The production method according to claim 1 , wherein a gap is arranged between a side wall of the groove on the reflective layer and the pad of the backlight plate; the gap is less than or equal to 30

10. The production method according to claim 9 , wherein the pad and an area that the gap corresponds to is the first area.

11. The production method according to claim 1 , further comprising:
connecting a light plate to the pad.

12. A backlight plate, comprising:
a light-transmitting underlay substrate, comprising a first area and a second area;
a pad, disposed on a position of the first area that the light-transmitting underlay substrate corresponds to;
a reflective plate, disposed on the light-transmitting underlay substrate; a groove being disposed on a position of the pad that the reflective layer corresponds to; the groove exposing the pad,
wherein the light transmission of the first area of the light-transmitting underlay substrate is less than that of the second area of the light-transmitting underlay substrate.

13. The backlight plate according to claim 12 , wherein the backlight plate comprises the plurality of pads; the plurality of pads are disposed at intervals; the groove exposes the plurality of pads.

14. The backlight plate according to claim 12 , wherein the backlight plate comprises the plurality of pads; the plurality of grooves are disposed on the reflective layer; the plurality of grooves correspond to the plurality of pads one on one.

15. The backlight plate according to claim 12 , wherein a side wall of the groove is vertical to the light-transmitting underlay substrate.

16. The backlight plate according to claim 12 , wherein the light-transmitting underlay substrate comprises a light-transmitting substrate and a light-shielding layer; the light-transmitting substrate comprises a light-shielding area; the light-shielding layer is defined as the first area.

17. The backlight plate according to claim 16 , wherein the light-shielding layer is disposed at opposite sides of the light-shielding area.

18. The backlight plate according to claim 12 , wherein the backlight plate comprises a light plate; the light plate is connected to the pad.

19. A backlight module, comprising a backlight plate as claimed in claim 12 .

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Deng Tong

Classifications

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• G02B6/0038

  Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title

• G02F1/133608

  including particular frames or supporting means · CPC title