Method for manufacturing light-mixing plate, light-mixing plate, and backlight module

Patent metadata

Field	Value
Publication number	US-12153244-B2
Application number	US-202117769957-A
Country	US
Kind code	B2
Filing date	Mar 15, 2021
Priority date	Mar 15, 2021
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

Provided is a method for manufacturing a light-mixing plate. The method includes disposing a plurality of shielding structures on a transparent substrate; forming a light-shielding film layer on the transparent substrate where the plurality of shielding structures are disposed, wherein a hole is formed at a position, corresponding to each of the plurality of shielding structures, of the light-shielding film layer; and removing the plurality of shielding structures.

First claim

What is claimed is:

1. A method for manufacturing a light-mixing plate, wherein the light-mixing plate is applicable to a backlight module, and the method comprises:
disposing a plurality of shielding structures on a transparent substrate;
forming a light-shielding film layer on the transparent substrate where the plurality of shielding structures are disposed, wherein a hole is formed at a position, corresponding to each of the plurality of shielding structures, of the light-shielding film layer; and
removing the plurality of shielding structures;
wherein a radius of the hole ranges from 0.225 mm to 1.45 mm; and a minimum distance between centers of any adjacent two holes of a plurality of holes is greater than 2 mm.

2. The method according to claim 1 , wherein forming the light-shielding film layer on the transparent substrate where the plurality of shielding structures are disposed comprises:
forming a light-shielding material layer on the transparent substrate where the plurality of shielding structures are disposed; and
forming the light-shielding film layer by curing the light-shielding material layer.

3. The method according to claim 2 , wherein forming the light-shielding material layer on the transparent substrate where the plurality of shielding structures are disposed comprises:
forming the light-shielding material layer by applying a light-shielding material onto the transparent substrate by a sprayer or a brush head.

4. The method according to claim 2 , wherein forming the light-shielding film layer by curing the light-shielding material layer comprises:
forming the light-shielding film layer by thermally curing the light-shielding material layer, wherein the light-shielding material layer is thermally cured at 140° C. to 160° C. and for 0.3 to 0.7 hours.

5. The method according to claim 2 , wherein forming the light-shielding material layer on the transparent substrate where the plurality of shielding structures are disposed comprises:
forming the light-shielding material layer by placing the transparent substrate where the plurality of shielding structure are disposed into a light-shielding material.

6. A light-mixing plate, applicable to a backlight module, comprising:
a transparent substrate; and
a light-shielding film layer disposed on the transparent substrate, wherein the light-shielding film layer is provided with a plurality of holes;
wherein a radius of the hole ranges from 0.225 mm to 1.45 mm; and a minimum distance between centers of any adjacent two holes of a plurality of holes is greater than 2 mm.

7. The light-mixing plate according to claim 6 , wherein a material of the light-shielding film layer comprises a reflecting material.

8. The light-mixing plate according to claim 7 , wherein the reflecting material comprises white oil.

9. The light-mixing plate according to claim 6 , wherein the transparent substrate comprises a top face, a bottom face, and a side face connecting the top face to the bottom face; and the light-shielding film layer comprises a first light-shielding film layer disposed on the top face and a second light-shielding film layer disposed on the bottom face.

10. The light-mixing plate according to claim 9 , wherein holes in the first light-shielding film layer are in one-to-one correspondence with and opposite to holes in the second light-shielding film layer.

11. The light-mixing plate according to claim 9 , wherein the centers of the plurality of holes are uniformly distributed in the light-shielding film layer.

12. A backlight module, comprising: a base substrate, a plurality of light-emitting devices, and the light-mixing plate as defined in claim 6 ; wherein the plurality of light-emitting devices are disposed on the base substrate, and the light-mixing plate is disposed on a side, distal from the base substrate, of the plurality of light-emitting devices.

13. The backlight module according to claim 12 , wherein the light-mixing plate comprises a plurality of light-mixing regions; wherein the plurality of light-mixing regions are in one-to-one correspondence with the plurality of light-emitting devices, and an orthographic projection of each of the plurality of light-emitting devices on the light-mixing plate falls within a corresponding light-mixing region; wherein in a first light-mixing region of the plurality of light-mixing regions, a size of a first hole is positively correlated with a first distance, the first distance being a distance between the first hole and the light-emitting device corresponding to the first light-mixing region.

14. The backlight module according to claim 12 , wherein in the light-mixing plate, the light-shielding film layer is disposed on a side, proximal to the light-emitting device, of a transparent substrate; or
the light-shielding film layer is disposed on a side, distal from the light-emitting device, of the transparent substrate.

Assignees

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

Inventors

• Zhu Yuanyuan
• Han Rui
• Cui Dong
• Zhang Zhipeng
• Zhai Yue
• Chi Weining
• Wang Fengping
• Leng Shouyang
• Song Binxin
• Li Wenyang

Classifications

• H10K50/80

  Constructional details · CPC title

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B6/0035

  provided on the surface of the light guide or in the bulk of it · CPC title