Liquid crystal display

Patent metadata

Field	Value
Publication number	US-9791748-B2
Application number	US-201414487632-A
Country	US
Kind code	B2
Filing date	Sep 16, 2014
Priority date	Nov 23, 2009
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An exemplary embodiment of the present invention relates to a liquid crystal display having a display area and a non-display area which includes a first substrate and a second substrate facing the first substrate, a layer having a first opening, a spacer disposed in the first opening, and a first light blocking member disposed in the non-display area. The spacer is disposed in the first opening to maintain an interval between the first substrate and the second substrate. The spacer and the first light blocking member include the same material.

First claim

What is claimed is:

1. A liquid crystal display including a display area and a non-display area, comprising:
a first substrate;
a second substrate facing the first substrate;
a color filter disposed on the first substrate;
a layer disposed on the color filter and disposed at the display area and the non-display area, the layer comprising a contact hole at the display area;
a pixel electrode disposed on the layer;
a main spacer overlapping the contact hole and protruding from the contact hole toward the second substrate, the main spacer maintaining an interval between the first substrate and the second substrate;
an assistance spacer to maintain an interval between the first substrate and the second substrate; and
a first light blocking member disposed in the non-display area,
wherein the main spacer and the first light blocking member comprise the same material, and
wherein the assistance spacer is further away from the second substrate than the main spacer, and
wherein the first light blocking member is thinner than the main spacer.

2. The liquid crystal display of claim 1 , wherein the main spacer and the assistance spacer comprise the same material.

3. The liquid crystal display of claim 1 , further comprising:
a thin film transistor disposed on the first substrate;
a passivation layer disposed on the thin film transistor; and
a pixel electrode disposed on the passivation layer,
wherein the pixel electrode is connected to a drain electrode of the thin film transistor through the contact hole.

4. The liquid crystal display of claim 1 , wherein a thickness of the main spacer is greater than a height of a cell gap.

5. The liquid crystal display of claim 4 , wherein the thickness of the main spacer is greater than the height of the cell gap by more than 1.0 μm.

6. The liquid crystal display of claim 5 , wherein the thickness of the main spacer is greater than 5.0 μm.

7. The liquid crystal display of claim 6 , wherein a width of the main spacer is decreased in an upper portion and a lower portion of the main spacer compared to a middle portion of the main spacer.

8. The liquid crystal display of claim 1 , wherein the assistance spacer is closer to the second substrate than the first light blocking member.

9. The liquid crystal display of claim 1 , further comprising:
a second light blocking member disposed in the display area,
wherein the first light blocking member and the second light blocking member comprise the same material.

10. The liquid crystal display of claim 9 , wherein the assistance spacer is closer to the second substrate than the second light blocking member.

11. A method for manufacturing a liquid crystal display comprising a display area and a non-display area, the method comprising:
forming a color filter on a first substrate;
forming a layer on a first substrate at the display area and the non-display area, the layer comprising a contact hole at the display area and covering the color filter at the display area;
forming a pixel electrode on the layer;
forming a main spacer overlapping the contact hole, the main spacer extending from the contact hole toward a second substrate and maintaining an interval between the first substrate and the second substrate;
forming an assistance spacer to maintain an interval between the first substrate and the second substrate; and
forming a first light blocking member disposed in the non-display area,
wherein the forming of the first light blocking member and the main spacer comprises using a translucent mask to reduce the thickness of the first light blocking member compared with the thickness of the main spacer; and
wherein the assistance spacer is further away from the second substrate than the main spacer, and
wherein the first light blocking member is thinner than the main spacer.

12. The method of claim 11 , wherein the main spacer and the assistance spacer are simultaneously formed.

13. The method of claim 11 , further comprising:
forming a thin film transistor on the first substrate;
forming a passivation layer on the thin film transistor; and
forming a pixel electrode on the passivation layer,
wherein the pixel electrode is connected to a drain electrode of the thin film transistor through the contact hole.

14. The liquid crystal display of claim 11 ,
wherein the main spacer and the first light blocking member are simultaneously formed.

15. The liquid crystal display of claim 14 , further comprising:
forming a second light blocking member in the display area,
wherein the first light blocking member and the second light blocking member are simultaneously formed.

16. The liquid crystal display of claim 15 , wherein the assistance spacer is closer to the second substrate than the second light blocking member.

17. The method of claim 12 , wherein the main spacer is formed to have a width that is decreased in an upper and a lower portion of the main spacer compared to a middle portion of the main spacer.

Assignees

• Samsung Display Co Ltd

Inventors

• Chang Sun-Young
• Huh Chul
• Lee Sang-Hun
• Kim Gwan-Soo
• Lee Yui-Ku

Classifications

• G02F1/13394 Primary

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/136227

  Through-hole connection of the pixel electrode to the active element through an insulation layer · CPC title

• G02F2001/13396

  Physics · mapped topic

• G02F2001/13398

  Physics · mapped topic

• G02F1/133512

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