Liquid crystal display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016259205-A1
Application number	US-201514934981-A
Country	US
Kind code	A1
Filing date	Nov 6, 2015
Priority date	Mar 2, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

A manufacturing method of a liquid crystal display includes forming display pixels which display an image and dummy pixels which do not display the image on a lower substrate including a display area and a non-display area positioned in at least one side outside the display area, coating a light blocking member material layer on a first dead space area adjacent to the display area and having a dummy area where the dummy pixels are positioned, a second dead space area adjacent to the first dead space area, and a third dead space area adjacent to the second dead space area in the non-display area, and forming first to third light blocking members through exposure by using an optical mask in which at least two or more halftone regions and a full-tone region are mixed.

First claim

What is claimed is:

1 . A liquid crystal display, comprising:
a lower substrate including a display area and a non-display area positioned in at least one side outside the display area; a plurality of pixels positioned on the lower substrate and including:
display pixels which is positioned in the display area and displays an image; and
dummy pixels which do not display the image; and
a light blocking member positioned on the lower substrate, wherein the non-display area includes a first dead space area adjacent to the display area and having a dummy area where the dummy pixels are positioned, a second dead space area adjacent to the first dead space area, and a third dead space area adjacent to the second dead space area, the light blocking member includes a first light blocking member positioned in the first dead space area, a second light blocking member positioned in the second dead space area, and a third light blocking member positioned in the third dead space area, and the first to third light blocking members have first to third thicknesses provided by using an optical mask in which at least one halftone region and a full-tone region are mixed.

2 . The liquid crystal display of claim 1 , wherein:
the first to third thicknesses of the first, second, third light blocking members, respectively, correspond to thicknesses of a light blocking part of the light blocking member of the display area, a sub spacer and a main spacer in the display area.

3 . The liquid crystal display of claim 2 , wherein:
the first thickness of the first light blocking member corresponds to the thickness of the light blocking part, and the second thickness of the second light blocking member corresponds to the thickness of the sub spacer.

4 . The liquid crystal display of claim 3 , wherein:
a first halftone region of the at least one halftone region has transmittance of about 16 percent, and a second halftone region of the at least one halftone region has transmittance of about 19 percent.

5 . The liquid crystal display of claim 2 , wherein:
the first thickness to third thickness are gradually increased or decreased.

6 . The liquid crystal display of claim 1 , wherein:
the first light blocking member is provided within about 100 micrometers to about 200 micrometers from the outermost pixel, the second light blocking member is provided within about 200 micrometers to about 800 micrometers from the outermost pixel, and the third light blocking member is provided within about 800 micrometers from the outermost pixel to the end of the lower substrate.

7 . The liquid crystal display of claim 1 , wherein:
a dummy color filter layer is differentially provided from the third light blocking member below the first and second light blocking members.

8 . The liquid crystal display of claim 7 , wherein:
the dummy color filter layer has an upper protruding pattern.

9 . The liquid crystal display of claim 8 , wherein:
the upper protruding pattern includes a stripe pattern of which a cross section has a hemispherical shape.

10 . The liquid crystal display of claim 9 , wherein:
the third light blocking member includes a light blocking support layer having the same thickness as that of the dummy color filter layer, and an overlap region overlapping the second light blocking member.

11 . The liquid crystal display of claim 10 , wherein:
a width of the overlap region is about 5 to about 10 micrometers.

12 . A manufacturing method of a liquid crystal display, comprising:
forming display pixels which display an image and dummy pixels which do not display the image on a lower substrate including a display area and a non-display area positioned in at least one side outside the display area; coating a light blocking member material layer on a first dead space area adjacent to the display area and having a dummy area where the dummy pixels are positioned, a second dead space area adjacent to the first dead space area, and a third dead space area adjacent to the second dead space area in the non-display area; and forming first to third light blocking members by using an optical mask in which at least two halftone regions and a full-tone region are mixed.

13 . The method of claim 12 , further comprising:
determining transmittance of the least two halftone regions and the full-tone region according to transmittance of the optical mask forming a light blocking part of a light blocking member of the display area, a sub spacer, and a main spacer in the display area.

14 . The method of claim 13 , wherein:
a first halftone region of the at least two halftone regions has transmittance of about 16 percent and a second halftone region has transmittance of about 19 percent.

15 . The method of claim 14 , wherein:
the first light blocking member is provided within about 100 micrometers to about 200 micrometers from the outermost pixel, the second light blocking member is provided within about 200 micrometers to about 800 micrometers from the outermost pixel, and the third light blocking member is provided within about 800 micrometers from the outermost pixel to the end of the lower substrate.

16 . The method of claim 15 , wherein:
the first to third light blocking members are provided by the optical mask having first halftone, second halftone, and full-tone regions having first to third transmittances, respectively, which are continuously and gradually increased or decreased, and the first halftone region has transmittance of about 16 percent, the second halftone region has transmittance of about 19 percent, and the full-tone region has transmittance of about 100 percent.

17 . The method of claim 16 , further comprising:
forming a dummy color filter layer below the first and second light blocking members before forming the first to third light blocking members.

18 . The method of claim 17 , further comprising:
forming an upper protruding pattern by using a two-tone optical mask on the dummy color filter layer.

19 . The method of claim 17 , further comprising:
forming a light blocking support layer of the third light blocking member to have the same thickness as that of the dummy color filter layer; and forming an overlap region protruding upward from the light blocking support layer and overlapping an upper edge of the second light blocking member.

20 . The method of claim 19 , wherein:
a width of the overlap region is about 5 micrometers to about 10 micrometers.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwak Chang Hun
• Mun Hye Ran
• Huh Chul

Classifications

• G02F1/136209 Primary

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• G02F1/13394 Primary

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

• G02F1/133512 Primary

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

• G02F2001/133388

  Physics · mapped topic

• G02F1/13625

  Patterning using multi-mask exposure · CPC title