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US006341862B1
(12) United States Patent ao) Patent No.: us 6,341,862 Bi
Miyazaki et al. (45) Date of Patent: *Jan. 29,2002
(54) COLOR FILTER, METHOD OF PRODUCING THE SAME AND LIQUID CRYSTAL DISPLAY DEVICE
(75) Inventors: Takeshi Miyazaki, Ebina; Katsuhiro Shirota, Kawasaki; Koichiro Nakazawa, Tokyo; Akihiko Yamada,
Yokohama, all of (JP)
(73) Assignee: Canon Kabushiki Kaisha, Tokyo (JP)
( * ) Notice: This patent issued on a continued prosecution application filed under 37 CFR 1.53(d), and is subject to the twenty year patent term provisions of 35 U.S.C. 154(a)(2).
Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 08/623,539
(22) Filed: Mar. 29, 1996
(30) Foreign Application Priority Data
Mar. 31, 1995 (JP) 7-074981
Mar. 22, 1996 (JP) 8-065676
(51) Int. CI.7 G03F 9/00; G03F 1/13
(52) U.S. CI 347/106; 349/107; 430/7
(58) Field of Search 347/1, 106, 107,
347/8; 349/106, 107, 891; 430/7, 25, 27
(56) References Cited
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FOREIGN PATENT DOCUMENTS
JP 54056847 5/1979
JP 59123670 7/1984
JP 59138461 8/1984
JP 60071260 4/1985
JP 188801 7/1989
JP 181216 6/1992
WO WO 21400 8/1995
* cited by examiner
Primary Examiner—Peter S. Wong
Assistant Examiner—Bao Q. Vu
(74) Attorney, Agent, or Firm—Fitzpatrick, Cella, Harper & Scinto
(57) ABSTRACT
The present invention relates to a color filter having a plurality of colored members as pixel portions which are formed by using dots of a plurality of color inks having different spectral characteristics. Light transmitting ink dots other than the color ink dots are respectively formed on the pixel portions.
21 Claims, 4 Drawing Sheets
