Method of fabricating a display panel and a display device with the display panel

Patent metadata

Field	Value
Publication number	US-11054690-B2
Application number	US-201816190154-A
Country	US
Kind code	B2
Filing date	Nov 14, 2018
Priority date	Nov 15, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A display device including a display panel and a light source to irradiate to the display panel a first color light having a peak wavelength within a specific wavelength range. The display panel includes a first display substrate, a second display substrate facing the first display substrate and including a base substrate, a metal layer, which includes metal grid patterns disposed on the base substrate, and a color conversion layer, which is disposed on the base substrate to cover the metal grid patterns, and a liquid crystal layer provided between the first and second display substrates. The metal grid patterns are configured to block a fraction of an ambient incident light that is in a specific wavelength range, and a peak wavelength of the first color light is within the specific wavelength range.

First claim

What is claimed is:

1. A display device, comprising:
a display panel; and
a light source to irradiate to the display panel a first color light having a peak wavelength within a specific wavelength range,
wherein the display panel comprises:
a first display substrate and
a second display substrate facing the first display substrate and,
wherein the second display substrate comprises:
a base substrate; and
a metal layer having metal grid patterns spaced apart from each other with substantially uniform pitch and disposed on the base substrate to block a fraction of an externally incident light in the specific wavelength range, and
a color conversion layer disposed on the base substrate covering the metal grid patterns, and filling a space between the metal grid patterns,
wherein the color conversion layer includes a luminous body configured to absorb the first color light and emit color light whose color is different from that of the first color light and includes a base resin and a scattering particle.

2. The display device of claim 1 , wherein the color conversion layer comprises:
a first conversion part including a first luminous body configured to absorb the first color light and emit a second color light;
a second conversion part including a second luminous body configured to absorb the first color light and emit a third color light; and
a third conversion part configured to allow the first color light to pass through.

3. The display device of claim 2 , wherein the metal grid patterns comprise:
first metal grid patterns directly disposed on the base substrate and overlapping the first conversion part; and
second metal grid patterns directly disposed on the base substrate and overlapping the second conversion part.

4. The display device of claim 3 , wherein the metal grid patterns further comprise a third metal grid pattern directly disposed on the base substrate and overlapping the third conversion part.

5. The display device of claim 2 , wherein the second display substrate further comprises a plurality of dam portions disposed between the first, second, and third conversion parts, respectively, and spaced apart from each other.

6. The display device of claim 5 , wherein each of the plurality of dam portions comprises:
a black matrix disposed on the base substrate; and
a dam disposed on the base substrate covering the black matrix.

7. The display device of claim 6 , wherein each of the plurality of dam portions further comprises a reflection layer covering the dam.

8. The display device of claim 6 , wherein the metal grid patterns are directly disposed on the base substrate and are covered with the black matrix.

9. The display device of claim 6 , wherein the black matrix is provided to delimit adjacent the first, second, and third color conversion parts, respectively.

10. The display device of claim 1 , wherein a line width of each of the metal grid patterns ranges from about 50 nm to about 600 nm, and
a distance between two adjacent metal grid patterns of the metal grid patterns ranges from about 100 nm to about 600 nm.

11. The display device of claim 1 , wherein the display panel further comprises a liquid crystal layer disposed between the first display substrate and the second display substrate, and
wherein the second display substrate further comprises an in-cell polarization layer including wire grid patterns disposed between the liquid crystal layer and the color conversion layer.

12. The display device of claim 11 , wherein a line width of each of the wire grid patterns is less than a line width of each of the metal grid patterns, and
a distance between two adjacent wire grid patterns of the wire grid patterns is less than a distance between two adjacent metal grid patterns of the metal grid patterns.

13. The display device of claim 11 , wherein a line width of each of the wire grid patterns ranges from about 10 nm to about 50 nm, and
a distance between two adjacent wire grid patterns of the wire grid patterns ranges from about 10 nm to about 100 nm.

14. The display device of claim 11 , wherein the metal layer has a first polarization axis that is substantially parallel to a first direction, and
the in-cell polarization layer has a second polarization axis that is substantially parallel to a second direction substantially perpendicular to the first direction.

15. The display device of claim 1 , wherein, in a thickness direction of the display panel, the first display substrate is closer to the light source than to the second display substrate.

16. The display device of claim 1 , wherein the first color light is a blue light and the externally incident light is ambient light.

17. The display device of claim 1 , wherein the second display substrate further comprises a polarization layer including wire grid patterns provided between the metal layer and the base substrate.

18. The display device of claim 1 , wherein the second display substrate further comprises a light control layer provided between the color conversion layer and the first display substrate, and
the light control layer is configured to absorb a second color light whose wavelength range is different from the specific wavelength range of the first color light.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Min-Uk
• Kwak Eun-Ae
• Song Junho
• Cho Youngje

Classifications

• G02F1/133531

  characterised by the arrangement of polariser or analyser axes · CPC title

• G02F1/133617

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• G02F2201/30

  grating · CPC title

• G02F1/133512

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