IP Library Granted Patent US 8,993,043
Granted Patent B2
US 8,993,043 · App. 11/478,297 · Granted Mar 31, 2015

Method for fabricating color filter layer of liquid crystal display device and method for fabricating liquid crystal display device using the same

Inventors: Soon-Sung Yoo (Gyeonggi-Do, KR); Duk-Chul Yun (Seoul, KR); Oh-Nam Kwon (Gyeonggi-do, KR); Youn-Gyoung Chang (Gyeonggi-do, KR); Heung-Lyul Cho (Gyeonggi-do, KR); Seung-Hee Nam (Gyeonggi-do, KR)
Assignee: LG Display Co., Ltd.
G02F1/133516G02B5/201G02F1/133512
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Quick Facts
Patent No.
US 8,993,043
App. No.
11/478,297
Granted
Mar 31, 2015
Kind
B2
Abstract

A method for fabricating color filter layer of an LCD comprises forming a plurality of black matrixes separated at certain intervals on a color filter substrate, and forming R, G and B color filter layers by using a plurality of needles between the plurality of black matrixes on the color filter substrate.

Claims (24)

1. A method for fabricating color filter layer of an LCD comprising:

forming a plurality of black matrixes separated at certain intervals on a color filter substrate; and

forming R, G and B color filter layers by using a plurality of needles between the plurality of black matrixes on the color filter substrate,

wherein forming the R, G and B color filter layers comprises:

trapping the R, G and B color pigments by using a surface tension of the plurality of needles; and

sequentially transferring the R, G and B color pigments onto a surface of the color filter substrate to form the R, G and B color filter layers,

wherein each of the R, G and B color filter layers has a uniform profile height lower than a profile height of surrounding black matrixes, the black matrixes serve as a spacer to maintain a cell gap between the color filter substrate and an array substrate,

wherein in trapping the R, G and B color pigments by using the surface tension of the plurality of needles and sequentially transferring the R, G and B color pigments onto the surface of the color filter substrate to form the R, G and B color filter layers, and an affinity of the R, G and B color pigments to the surface of the color filter substrate is stronger than that of the needles,

wherein surfaces of the R, G and B color pigments, the color filter substrate and the needles have hydrophilicity, and the hydrophilicity of the surface of color filter substrate is stronger than that of the needles.

2. The method of claim 1 , wherein the color filter layers are formed between the plurality of black matrixes on the color filter substrate.

3. A method for fabricating a liquid crystal display device comprising:

forming a plurality of gate lines on an array substrate;

forming a plurality of data lines to cross the plurality of gate lines on the array substrate;

forming thin film transistors (TFTs) at each crossing of the plurality of gate lines and the plurality of data lines;

forming a plurality of black matrixes separated at certain intervals on a color filter substrate;

forming R, G and B color filter layers between the plurality of black matrixes on the color filter substrate by using a plurality of needles,

wherein forming the R, G and B color filter layers comprises trapping the R, G and B color pigments by using a surface tension of the plurality of needles; and

sequentially transferring the R, G and B color pigments onto a surface of the color filter substrate to form the R, G and B color filter layers,

wherein each of the R, G and B color filter layers has a uniform profile height lower than a profile height of surrounding black matrixes, the black matrixes serve as a spacer to maintain a cell gap between the color filter substrate and the array substrate,

wherein in trapping the R, G and B color pigments by using the surface tension of the plurality of needles and sequentially transferring the R, G and B color pigments onto the surface of the color filter substrate to form the R, G and B color filter layers, and an affinity of the R, G and B color pigments to the surface of the color filter substrate is stronger than that of the needles, and wherein surfaces of the R, G and B color pigments, the color filter substrate and the needles have hydrophilicity, and the hydrophilicity of the surface of color filter substrate is stronger than that of the needles; and

forming a liquid crystal layer between the array substrate and the color filter substrate.

4. The method of claim 3 , wherein the color filter layers are formed between the plurality of black matrixes on the color filter substrate.

5. The method of claim 3 , further comprising:

forming pixel electrodes that electrically connect the TFTs on the array substrates.

Assignments (2)
CHANGE OF NAME Recorded May 20, 2008
From: LG. PHILIPS CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 020963/0710 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 14, 2006
From: YOO, SOON-SUNG; YUN, DUK-CHUL; KWON, OH-NAM; CHANG, YOUN-GYOUNG; CHO, HEUNG-LYUL; NAM, SEUNG-HEE
To: LG. PHILIPS LCD CO., LTD.
Reel/Frame 018246/0467 →
Priority Claims (1)
KR 10-2005-0136171 · Dec 30, 2005 · national
Continuity (1)
Related Publication 20070153166A1 · Jul 5, 2007