Granted Patent B2

US 12,197,063 · App. 17/758,209 · Granted Jan 14, 2025

Inventors: Weiheng Yang (Guangdong, CN); Hong Yang (Guangdong, CN); Zhichao Liao (Guangdong, CN)

Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.

G02F1/133512G02F1/133502G02F1/133504

Abstract

Claims (26)

1. A display module, comprising:

a display panel comprising a plurality of pixels disposed at intervals; and

a first light-blocking layer disposed on a light exit side of the display panel, wherein the first light-blocking layer comprises a plurality of light-filtering units disposed at intervals and reflected light-reducing layers each of which disposed between the corresponding light-filtering units which are adjacent to each other, wherein the light-filtering units are respectively disposed corresponding to the plurality of pixels, wherein each reflected light-reducing layer comprises a first refraction layer and a second refraction layer that are arranged in a stacking manner, and wherein a refractive index of the first refraction layer is not equal to a refractive index of the second refraction layer;

wherein the display module further comprises a diffusion layer, the diffusion layer is disposed between the first light-blocking layer and the display panel, and the diffusion layer comprises a substrate and a prism layer sequentially stacked in the light emission direction of the display panel;

the prism layer comprises a plurality of prism bars arranged at intervals in sequence, each prism bar has a top edge and two bottom edges, and the two bottom edges are connected with the substrate and the top edge protrudes from the substrate;

wherein base length L of each prism bar is distance between two bottom edges of each prism bar, and spacing P between adjacent two of the prism bars is distance between the top edges of the adjacent two of the prism bars, respectively; and

wherein every at least one prism bar arranged in sequence is taken as a prism group, the base length L of each prism bar comprised in each prism group is same, the spacing P between any adjacent two of the prism bars in each prism group is same, and L/P values of any adjacent two of the prism groups are different.

2. The display module of claim 1 , wherein the first refraction layer and the second refraction layer are sequentially stacked in a light emission direction of the display panel, and wherein the refractive index of the first refraction layer is greater than the refractive index of the second refraction layer.

3. The display module of claim 2 , wherein the refractive index of the first refraction layer is 1.6-1.65, and the refractive index of the second refraction layer is 1.3-1.4.

4. The display module of claim 3 , wherein thickness of the first refraction layer is 3 μm-5 μm and thickness of the second refraction layer is 90 nm-110 nm.

5. The display module of claim 1 , wherein the second refraction layer comprises a first matrix and first matting particles dispersed in the first matrix, wherein the first refraction layer comprises a second matrix and second matting particles dispersed in the second matrix, and wherein a refractive index of the first matting particles is less than a refractive index of the second matting particles.

6. The display module of claim 5 , wherein the first matting particles comprise one or both of the following: silica sol particles and silica particles.

7. The display module of claim 6 , wherein each silica sol particle has particle size of 10 nm-60 nm.

8. The display module of claim 7 , wherein the first matrix and first matting particles comprise silica sol particles each of which has the particle size of 10 nm-15 nm and silica sol particles each of which has the particle size of 40 nm-60 nm, and a mass ratio between the silica sol particles each of which has the particle size of 10 nm-15 nm and the silica sol particles each of which has the particle size of 40 nm-60 nm can be (1-5):(1-5).

9. The display module of claim 6 , wherein each silica particle has particle size of 40 nm-70 nm.

10. The display module of claim 6 , wherein the silica particles comprise hollow silica particles, and wherein each hollow silica particle has a hollow structure inside itself.

11. The display module of claim 10 , wherein volume of the hollow structure accounts for 30%-60% of total volume of each hollow silica particle.

12. The display module of claim 10 , wherein the silica particles further comprise one or both of ordinary solid silica particles and mesoporous silica particles, the mesoporous silica particles refer to silica particles with pits on the corresponding surfaces, and a refractive index of the hollow silica particles is less than a refractive index of ordinary solid silica particles.

13. The display module of claim 5 , wherein the second matting particles comprise metal oxide particles.

14. The display module of claim 13 , wherein each metal oxide particle has particle size of 10 nm-50 nm.

15. The display module of claim 13 , wherein a refractive index of metal oxide particles is 1.9-2.3.

16. The display module of claim 15 , wherein material of the metal oxide particles comprises one or more of the following: zinc oxide, titanium oxide, tin oxide, and indium tin oxide.

17. The display module of claim 1 , wherein the display module further comprises a second light-blocking layer, wherein the second light-blocking layer is disposed between the display panel and the first light-blocking layer, and wherein the second light-blocking layer comprises one or both of the following: liquid crystal material and dichroic material.

18. The display module of claim 17 , wherein the display module further comprises a roughened layer, wherein the roughened layer is disposed between the second light-blocking layer and the first light-blocking layer, and wherein a surface of the roughened layer on a side of the roughened layer facing the first light-blocking layer is an uneven structure.

19. The display module of claim 1 , wherein L/P values respectively of all of the prism groups in the prism layer are different.

20. The display module of claim 1 , wherein a color of the light passing through each light-filtering unit is consistent with a color of a correspondingly disposed pixel.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (19)