Liquid crystal display device and manufacturing method of the same

Patent metadata

Field	Value
Publication number	US-11099421-B2
Application number	US-202016737559-A
Country	US
Kind code	B2
Filing date	Jan 8, 2020
Priority date	Aug 22, 2016
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A liquid crystal display device and a method of manufacturing the same are provided. The LCD device includes a substrate including a display area and a non-display area, a blue light blocking filter on the substrate, a plurality of color pattern layers spaced apart from one another in a plan view, a black matrix among the plurality of color pattern layers in a plan view, a planarization layer on the color pattern layer and the black matrix, and a polarizer on the planarization layer. The color pattern layer includes a red color conversion unit on the blue light blocking filter, which converts a light into a light having a red wavelength and a green color conversion unit on the blue light blocking filter, which converts a light into a light having a green wavelength. The red color conversion unit and the green color conversion unit include wavelength converting particles.

First claim

What is claimed is:

1. A display device comprising:
a first substrate comprising a display area;
a blue light blocking filter on the first substrate;
a color pattern layer comprising a red color conversion layer on the blue light blocking filter and a green color conversion layer on the blue light blocking filter; and
a metal layer between the red color conversion layer and the green color conversion layer in a plan view,
wherein the metal layer comprises:
a base portion;
a first extension portion extending from a first edge of the base portion; and
a second extension portion extending from a second edge of the base portion,
wherein the first and second extension portions have round-shaped cross sections, respectively, and
wherein a convex portion of the first extension portion and a convex portion of the second extension portion protrude toward each other.

2. The display device as claimed in claim 1 , further comprising:
wherein a planarization layer on the color pattern layer and the metal layer; and
a polarizer on the planarization layer, the polarizer being in direct contact with the planarization layer.

3. The display device as claimed in claim 2 , wherein the polarizer comprises a linear polarizer, and the linear polarizer is a wire grid polarizer (WGP).

4. The display device as claimed in claim 1 , wherein the red color conversion layer and the green color conversion layer comprise wavelength converting particles.

5. The display device as claimed in claim 4 , wherein the wavelength converting particle comprises at least one of: a phosphor, a quantum dot particle, or a quantum rod particle.

6. The display device as claimed in claim 2 , further comprising:
a light source unit configured to emit a blue light; and
a transparent pattern layer spaced apart from the blue light blocking filter in a plan view to contact the first substrate.

7. The display device as claimed in claim 6 , wherein the metal layer is further disposed between the color pattern layer and the transparent pattern layer.

8. The display device as claimed in claim 1 , further comprising a light source unit configured to emit an ultraviolet light,
wherein the color pattern layer further comprises a blue color conversion layer spaced apart from the blue light blocking filter in a plan view to contact the first substrate and configured to convert a light into a light having a blue wavelength.

9. The display device as claimed in claim 6 , further comprising a dichroic reflection layer among the metal layer and the blue light blocking filter, the color pattern layer, and the transparent pattern layer.

10. The display device as claimed in claim 6 , further comprising a dichroic reflection layer among the planarization layer and the blue light blocking filter, the color pattern layer, the transparent pattern layer, and the metal layer.

11. The display device as claimed in claim 1 , further comprising a dummy pattern in a non-display area of the first substrate.

12. The display device as claimed in claim 11 , wherein the metal layer is further disposed on the non-display area of the first substrate such that the metal layer is adjacent to the dummy patterns.

13. The display device as claimed in claim 1 , further comprising a second substrate facing the first substrate and a data line on the second substrate.

14. The display device as claimed in claim 13 , wherein the metal layer includes a groove recessed toward the first substrate,
the groove is defined by the base portion, the first extension portion and the second extension portion.

15. The display device as claimed in claim 1 , wherein the metal layer includes a plurality of metal layers spaced apart from each other, and at least one metal layer contacts the first substrate.

16. A method of manufacturing a display device, the method comprising:
forming a blue light blocking filter on a substrate;
forming a color pattern layer and a transparent pattern layer on the substrate;
forming a black matrix on the substrate;
forming a planarization layer on the substrate; and
forming a polarizer on the substrate,
wherein the color pattern layer comprises wavelength converting particles, and
wherein the black matrix comprises:
a base portion on the first substrate;
a first extension portion extending from a first edge of the base portion; and
a second extension portion extending from a second edge of the base portion,
wherein the first and second extension portions have round-shaped cross sections, respectively, and
wherein a convex portion of the first extension portion and a convex portion of the second extension portion protrude toward each other.

17. The method as claimed in claim 16 , further comprising forming a dichroic reflection layer on the substrate before forming the planarization layer.

18. The method as claimed in claim 16 , further comprising forming a dichroic reflection layer on the substrate before forming the polarizer.

19. The method as claimed in claim 16 , wherein forming of the black matrix on the substrate comprises:
coating a black matrix forming material;
coating a photoresist;
developing the photoresist;
etching the black matrix forming material; and
stripping the photoresist,
wherein the black matrix forming material comprises a metal.

20. The method as claimed in claim 16 , wherein forming of the color pattern layer and the transparent pattern layer on the substrate further comprises:
forming a dummy pattern.

21. The display device as claimed in claim 1 , wherein the metal layer reflects light emitted from the color pattern layer toward a side surface of the color pattern layer to be emitted toward a front surface of the first substrate.

Assignees

• Samsung Display Co Ltd

Inventors

• Kang Hoon
• Yang Yonghoon
• JUNG Euisuk
• Kim Hyein
• Sugitani Koichi

Classifications

• G02F2202/108

  quantum wells · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/133512

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

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title