Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1993-10-19
1995-01-03
Group, Karl
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106411, 106493, 106494, 106495, 106497, 106498, 252582, 252584, 252585, 252586, 359885, 428410, C09B 6750
Patent
active
053782747
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a novel color filter, a method for manufacture of said color filter and a liquid crystal projector using said color filter. More particularly, it relates to a color filter having a film of coloring matter in the three primary colors of red (R), green (G) and blue (B), excellent light resistance and heat resistance and capable of withstanding the use of highly bright light sources, a method for efficiently manufacturing said color filter according to the micellar disruption method and a liquid crystal projector using said color filter which has a long life and is economically advantageous.
BACKGROUND ART
In recent years, color displays of image in liquid crystal television sets, personal computers of lap top type and so on have been advanced by the development of multicolor display devices comprising a linear electrode-simple matrix, time-sharing drive or an active matrix drive wherein every picture element is incorporated with a thin film transistor (TFT).
Some of these developments have already been merchandised as a small size color liquid crystal television set.
These multicolor display devices use color filters having films of coloring matter in the three primary colors of RGB. Conventionally, the color filters have been manufactured according to various methods. For example, the dyeing method (Japanese Patent Application Laid-Open No. 55301/1985), the printing method (Japanese Patent Application Laid-Open No. 46325/1983 and Japanese Patent Application Laid-Open No. 29225/1984), the pigment dispersion method (Japanese Patent Application Laid-Open No. 237403/1985), the electrodeposition method (Japanese Patent Application Laid-Open No. 270730/1986), the vapor deposition method (Japanese Patent Application Laid-Open No. 166607/1980), the micellar disruption method (Japanese Patent Application Laid-Open No. 243298/1988 and Japanese Patent Application Laid-Open No. 50538/1988 through PCT) and so on have been known. The color filters thus manufactured have widely been used as the liquid crystal display material in liquid crystal television sets (Japanese Patent Application Laid-Open No. 7886/1986), personal computers of lap top type (Japanese Patent Application Laid-Open No. 105613/1985) and so on.
Meanwhile, liquid crystal projectors such as liquid crystal television projector, overhead projector and video projector have attracted attention as a large size display apparatus to replace color CRTs, and their development has been sped up in recent years. There have been known two types of liquid crystal projector. One of them is a projector of single plate type (Japanese Patent Application Laid-Open No. 41086/1985) and another a projector of three plate type (Japanese Patent Application Laid-Open No. 306792/1988 ). However, the devices of single plate type have a short life because of conventional color filters all of which are poor in light resistance and it is necessary that these devices be improved so as to prolong the service life. On the other hand, the liquid crystal projectors of three plate type have the drawbacks that their manufacturing cost is at a high side because they have to have an equivalent to 3 sets each of optical system and dichroic mirror and that the optical system is a complicated one.
Thus, it is necessary that a color filter excellent in light resistance be developed. Liquid crystal projectors of single plate type capable of using strong light sources will be made available by the use of color filters having excellent light resistance if such color filters come true. In addition, liquid crystal panels for overhead projector and for car will be permitted to use strong backlighting with the improved color filters, to have elevated reliability and a significantly longer life.
In color filters, the light is shielded respectively in part of the wavelengths ascribed to every color to generate the heat. Accordingly, highly bright light sources applied to color filters gives rise to the elevation of temperatures on the surface of the colo
REFERENCES:
patent: 2728814 (1955-12-01), Berger
patent: 3104176 (1963-09-01), Hovey
patent: 4786148 (1988-11-01), Sekimura et al.
patent: 4934791 (1990-06-01), Shimizu et al.
patent: 5185074 (1993-02-01), Yokoyama et al.
Hiroi Yoshio
Ishikawa Motoharu
Watanabe Nobuaki
Yokoyama Seiichiro
Group Karl
Hertzog Scott L.
Idemitsu Kosan Co. Ltd.
LandOfFree
Color filter, method for manufacture thereof and liquid crystal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color filter, method for manufacture thereof and liquid crystal , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color filter, method for manufacture thereof and liquid crystal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2208446