Liquid crystal display device and manufacturing method of the same

Patent metadata

Field	Value
Publication number	US-10534216-B2
Application number	US-201715673123-A
Country	US
Kind code	B2
Filing date	Aug 9, 2017
Priority date	Aug 22, 2016
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A liquid crystal display (“LCD”) device and a method of manufacturing the LCD device, the LCD device including: 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, the red color conversion unit converting a light into a light having a red wavelength; and a green color conversion unit on the blue light blocking filter, the green color conversion unit converting a light into a light having a green wavelength, and 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 and a non-display area;
a blue light blocking filter on the first substrate;
a plurality of color pattern layers spaced apart from one another in a plan view, the plurality of color pattern layers on the blue light blocking filter;
a black matrix among the plurality of color pattern layers in a plan view;
a planarization layer on the color pattern layers and the black matrix; and
a plurality of dummy patterns on the non-display area of the first substrate,
wherein the plurality of dummy patterns have a lesser thickness as the plurality of dummy patterns are closer to an edge of the first substrate,
wherein the color pattern layers comprise:
a red color conversion unit on the blue light blocking filter, the red color conversion unit configured to convert a light into a light having a red wavelength; and
a green color conversion unit on the blue light blocking filter, the green color conversion unit configured to convert a light into a light having a green wavelength, and
the red color conversion unit and the green color conversion unit comprise wavelength converting particles,
wherein the black matrix includes a groove recessed toward the first substrate.

2. The display device as claimed in claim 1 , further comprising a polarizer on the planarization layer, wherein the polarizer comprises a linear polarizer, and the linear polarizer is a wire grid polarizer (WGP).

3. The display device as claimed in claim 1 , wherein the wavelength converting particle comprises at least one of: a phosphor, a quantum dot particle, or a quantum rod particle.

4. The display device as claimed in claim 1 , further comprising a light source unit configured to emit a blue light.

5. The display device as claimed in claim 4 , wherein the black matrix is further disposed between the color pattern layers and the transparent pattern layer.

6. The display device as claimed in claim 1 , further comprising a light source unit configured to emit an ultraviolet light.

7. The display device as claimed in claim 5 , further comprising a dichroic reflection layer among the black matrix and the blue light blocking filter, the color pattern layers, and the transparent pattern layer.

8. The display device as claimed in claim 5 , further comprising a dichroic reflection layer among the planarization layer and the blue light blocking filter, the color pattern layers, the transparent pattern layer, and the black matrix.

9. The display device as claimed in claim 1 , wherein the black matrix comprises a metal.

10. The display device as claimed in claim 1 , wherein the black matrix does not overlap upper surfaces of the color pattern layers, the upper surfaces facing the planarization layer.

11. 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.

12. The display device as claimed in claim 11 , wherein the groove faces the data line.

13. The display device as claimed in claim 1 , wherein the black matrix is further disposed on the non-display area of the first substrate such that the black matrix is adjacent to the plurality of the dummy patterns.

14. The display device as claimed in claim 13 , wherein the black matrix has a lesser thickness as the black matrix is closer to the edge of the first substrate.

15. The display device as claimed in claim 5 , wherein the black matrix between the red color conversion unit and the green color conversion unit has a thickness different from the black matrix between the green color conversion unit and the transparent pattern layer.

16. The display device as claimed in claim 15 , wherein the black matrix between the red color conversion unit and the green color conversion unit has a lesser thickness than the black matrix between the green color conversion unit and the transparent pattern layer.

17. The display device as claimed in claim 1 , further comprising a dichroic reflection layer overlapping the black matrix.

18. The display device as claimed in claim 17 , further comprising a transparent pattern layer spaced apart from the blue light blocking filter in a plan view to contact the first substrate,
wherein the dichroic reflection layer overlaps an entire surface of the first substrate, an entire surface of the blue light blocking filter, an entire surface of the color pattern layer, and an entire surface of the transparent pattern layer.

19. The display device as claimed in claim 17 , wherein the dichroic reflection layer overlaps the groove of the black matrix.

20. The display device as claimed in claim 1 , further comprising a transparent pattern layer spaced apart from the blue light blocking filter in a plan view to contact the first substrate.

21. The display device as claimed in claim 1 , wherein the color pattern layers further comprises a blue color conversion unit 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.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• G02F1/133617 Primary

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

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F2201/121

  common or background · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F2201/123

  pixel · CPC title