Display panel

Patent metadata

Field	Value
Publication number	US-10690977-B1
Application number	US-201916391329-A
Country	US
Kind code	B1
Filing date	Apr 23, 2019
Priority date	Apr 23, 2019
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A display panel includes a top substrate having a top surface, a plurality of protrusions disposed on the top surface of the top substrate, an antireflective layer disposed on the top surface of the top substrate, a light shielding layer, a bottom substrate positioned at a side of the top substrate opposite to the top surface of the top substrate, and a display medium layer disposed between the top substrate and the bottom substrate. A first projection of the light shielding layer onto the top substrate is completely located within a second projection of the antireflective layer onto the top substrate, and a bottom surface of the light shielding layer is nonplanar to cover the plurality of protrusions.

First claim

What is claimed is:

1. A display panel comprising:
a top substrate having a top surface;
a plurality of protrusions disposed on the top surface of the top substrate;
an antireflective layer disposed on the top surface of the top substrate;
a light shielding layer, wherein a first projection of the light shielding layer onto the top substrate is completely located within a second projection of the antireflective layer onto the top substrate, and a bottom surface of the light shielding layer is nonplanar to cover the plurality of protrusions;
a bottom substrate positioned at a side of the top substrate opposite to the top surface of the top substrate; and
a display medium layer disposed between the top substrate and the bottom substrate.

2. The display panel according to claim 1 , wherein the antireflective layer is continuously distributed at least underneath the light shielding layer.

3. The display panel according to claim 1 , wherein at least one of the protrusions is stepped and has different levels, and the bottom surface of the light shielding layer extends along a top surface and a side surface of the at least one of the protrusions.

4. The display panel according to claim 1 , wherein a distance between the bottom surface of the top substrate and a top surface of the antireflective layer is greater than or equal to a distance between the bottom surface of the top substrate and a bottom surface of each of the plurality of protrusions.

5. The display panel according to claim 1 , wherein a third projection of one of the protrusions onto the top substrate is circular, elliptical, triangular, rectangular, polygonal, U-shaped, loop-shaped, closed and irregular in shape.

6. The display panel according to claim 1 , wherein materials of the protrusions are identical to a material of the antireflective layer.

7. The display panel according to claim 1 , wherein at least one of the protrusions is a stacked multi-layer thin film.

8. The display panel according to claim 1 , wherein an outer edge of the light shielding layer and a first edge of one of the plurality of protrusions closest to the outer edge are spaced apart by a first distance, and an inner edge of the light shielding layer and a second edge of one of the protrusions closest to the inner edge are spaced apart by a second distance.

9. The display panel according to claim 1 , wherein at least one of the plurality of protrusions comprises a first portion and a second portion, and the second portion is in contact with the first portion.

10. The display panel according to claim 9 , wherein a material of the second portion is different from a material of the first portion.

11. The display panel according to claim 9 , wherein the second portion is disposed on a top surface of the first portion to partially expose the first portion.

12. The display panel according to claim 9 , wherein the second portion is disposed beside the first portion.

13. The display panel according to claim 12 , wherein a top surface of the first portion and a top surface of the second portion are noncoplanar.

14. The display panel according to claim 9 , wherein the second portion comprises a first section and a second section, the first section is disposed on a top surface of the first portion, and the second section is disposed beside the first portion.

15. The display panel according to claim 14 , wherein the top surface of the first portion and a top surface of the second section are noncoplanar.

16. The display panel according to claim 14 , wherein a first cross-section width of the first portion or a second cross-section width of the first section is in a range of 20 micrometers to 200 micrometers.

17. The display panel according to claim 14 , wherein a first thickness of the first portion, a second thickness of the first section or a third thickness of the second section is in a range of 50 angstroms to 50 micrometers.

18. The display panel according to claim 1 , wherein cross-section widths of the plurality of protrusions are greater than 10% of a cross-section width of the light shielding layer and less than 50% of the cross-section width of the light shielding layer.

19. The display panel according to claim 1 , wherein thicknesses of the plurality of protrusions are less than 50% of a distance between a top surface of the light shielding layer and the bottom surface of the light shielding layer.

20. The display panel according to claim 1 , further comprising a hydrophobic layer disposed on the top surface of the top substrate, wherein an outer edge of the light shielding layer is aligned with an inner edge of the hydrophobic layer.

Assignees

• Himax Display Inc

Inventors

• Pan Po-Hung

Classifications

• G02F1/133502 Primary

  Antiglare, refractive index matching layers · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F2201/38

  Anti-reflection arrangements · CPC title

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title