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Title:
COLOR FILTER FOR LIQUID CRYSTAL DISPLAY AND TENSION EXPANSION FILM FORMATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/1994/007158
Kind Code:
A1
Abstract:
A color filter for a liquid crystal display includes an optically transparent support (100), a transparent conductor layer (500) formed on the support (100) and a coloring layer (200) formed on the transparent conductor layer (500) having red, green and blue pixels disposed in a predetermined pattern, wherein this coloring layer (200) has a specific dielectric constant of at least 2.0 under a measurement condition in which an A.C. voltage of 5 V and a frequency of 1 KHz to 100 KHz is applied, and each pixel of red, green and blue constituting the coloring layer has a specific dielectric constant within the range of U25 % of the mean value under the measurement condition described above. The coloring layer (200) is 0.4 to 1.0 mum thick. This color filter can provide a liquid crystal display wherein the electro-optical characteristics of the pixels substantially coincide with one another, a sufficient effective voltage can be applied, though it uses an electrode under-fitting structure (COI structure), and color regulation can be satisfactorily made.

Inventors:
ARUGA HISASHI (JP)
TAKIZAWA KEIJI (JP)
SAWADA RYUJI (JP)
KOBAYASHI TAKASHI (JP)
Application Number:
PCT/JP1993/001337
Publication Date:
March 31, 1994
Filing Date:
September 17, 1993
Export Citation:
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Assignee:
SEIKO EPSON CORP (JP)
ARUGA HISASHI (JP)
TAKIZAWA KEIJI (JP)
SAWADA RYUJI (JP)
KOBAYASHI TAKASHI (JP)
International Classes:
G02B5/20; G02F1/1335; (IPC1-7): G02B5/20; B05C1/02; B05C11/10
Foreign References:
JPH02211402A1990-08-22
JPH04401A1992-01-06
JPH0224603A1990-01-26
JPH02804A1990-01-05
JPH04413A1992-01-06
JPH04194943A1992-07-14
JPH04190362A1992-07-08
JPS58122505A1983-07-21
JPH02166404A1990-06-27
JPS6360426A1988-03-16
JPH01293306A1989-11-27
JPH0437804A1992-02-07
JPH0531423A1993-02-09
JPS6283572U1987-05-28
JPS63119876A1988-05-24
JPH04110058A1992-04-10
JPS6436072U1989-03-06
Other References:
See also references of EP 0622644A4
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