Liquid crystal display

• US 9,658,482 B2
• Filed: 07/10/2014
• Issued: 05/23/2017
• Est. Priority Date: 01/20/2014
• Status: Active Grant

• Current Assignee: TCL China Star Optoelectronics Technology Co. Ltd. (TCL Technology Group Corp.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jeon, Baek Kyun, Kim, Young Gu, Jung, Min-Sik
• Primary Examiner(s): DUDEK, JAMES A
• Application Number:
  US14/327,787
• Publication Number:
  US 20150205160A1
• Time in Patent Office: 1,048 Days
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio

Abstract

A liquid crystal display includes a plurality of red pixel areas, a plurality of green pixel areas, a plurality of blue pixel areas, and a light blocking member which defines the plurality of red pixel areas, the plurality of green pixel areas, and the plurality of blue pixel areas therein, and includes an expansion portion which overlaps a spacer which maintains a cell gap and is provided between the plurality of green pixel areas and the plurality of blue pixel areas and between the plurality of red pixel areas and the plurality of green pixel areas.

Claims

1. A liquid crystal display comprising:

a plurality of red pixel areas;

a plurality of green pixel areas;

a plurality of blue pixel areas;

a spacer configured to maintain a cell gap; and

a light blocking member which defines the plurality of red pixel areas, the plurality of green pixel areas, and the plurality of blue pixel areas therein,

wherein the plurality of red pixel areas, the plurality of green pixel areas, and the plurality of blue pixel areas are arranged in a matrix,

wherein the light blocking member overlaps the spacer,

wherein the spacer is provided between the plurality of green pixel areas and the plurality of blue pixel areas and between the plurality of red pixel areas and the plurality of green pixel areas and provided in plural with a ratio of one spacer per five pixel areas along a row direction of the matrix in two rows of the pixel areas,

wherein a width of the spacer is equal to or smaller than 1/3 of a width of the light blocking member, and

wherein the light blocking member extends more than 6 micrometers from a peripheral edge defining the spacer.

2. The liquid crystal display of claim 1, wherein the light blocking member comprises an expansion portion which overlaps the spacer, and a width of the expansion portion is smaller than or equal to a width of the light blocking member in a same direction.

3. The liquid crystal display of claim 2, wherein the expansion portion is provided between the plurality of blue pixel areas and the plurality of red pixel areas.

4. The liquid crystal display of claim 1, wherein the width of the light blocking member is a distance between adjacent rows in the matrix.

5. The liquid crystal display of claim 2, wherein the width of the spacer is smaller than the width of the expansion portion.

6. The liquid crystal display of claim 1, further comprising:

a lower panel including a first alignment layer; and

an upper panel facing the lower panel and including a second alignment layer,

wherein the first alignment layer and the second alignment layer are photo-aligned layers.

7. The liquid crystal display of claim 6, wherein the first alignment layer and the second alignment layer are horizontal alignment layers.

8. The liquid crystal display of claim 6, wherein the first alignment layer and the second alignment layer include at least one of a cyclobutane-based photodegradable material and an azobenzene-based photoisomerization material.

9. The liquid crystal display of claim 6, wherein the spacer maintains the cell gap by supporting the lower panel and the upper panel.

10. A liquid crystal display comprising:

a lower panel including a first substrate,

a thin film transistor provided on the first substrate,

a passivation layer provided on the thin film transistor,

a pixel electrode provided on the passivation layer, and

a first alignment layer on the pixel electrode;

an upper panel which includes a second substrate, a light blocking member and a color filter which are provided on the second substrate and faces the lower panel; and

a spacer configured to maintain a cell gap by supporting the lower panel and the upper panel,

wherein

the light blocking member defines a plurality of red pixel areas, a plurality of green pixel areas, and a plurality of blue pixel areas therein,

the plurality of red pixel areas, the plurality of green pixel areas, and the plurality of blue pixel areas are arranged in a matrix,

the spacer is provided in plural with a ratio of one spacer per five pixel areas along a row direction of the matrix in two rows of the pixel areas,

a width of the spacer is equal to or smaller than 1/3 of a width of the light blocking member, and

the light blocking member extends more than 6 micrometers from a peripheral edge defining the spacer.

11. The liquid crystal display of claim 10, wherein the light blocking member comprises an expansion portion overlapping the spacer, and the expansion portion is provided between the plurality of green pixel areas and the plurality of blue pixel areas and between the plurality of red pixel areas and the plurality of green pixel areas.

12. The liquid crystal display of claim 11, wherein the expansion portion is provided between the plurality of blue pixel areas and the plurality of red pixel areas.

13. The liquid crystal display of claim 10, wherein the width of the light blocking member is a distance between adjacent rows in the matrix.

14. The liquid crystal display of claim 11, wherein the width of the spacer is smaller than the width of the expansion portion.

15. The liquid crystal display of claim 10, further comprising a second alignment layer on the light blocking member and the color filter.

16. The liquid crystal display of claim 15, wherein the first alignment layer and the second alignment layer are photo-aligned layers.

17. The liquid crystal display of claim 16, wherein the first alignment layer and the second alignment layer are horizontal alignment layers.

18. The liquid crystal display of claim 16, wherein the first alignment layer and the second alignment layer include at least one of a cyclobutane-based photodegradable material and an azobenzene-based photoisomerization material.