Title:
PROJECTION-TYPE LIQUID CRYSTALLINE PROJECTOR
Document Type and Number:
WIPO Patent Application WO/1992/015041
Kind Code:
A1
Abstract:
A projector for synthesizing and projecting an image of three primary colors formed by liquid-crystal light bulbs, wherein deviation in pixels and color shading are improved by correcting errors of the position and angles of mounting the liquid-crystal light bulbs and by eliminating effects on parts caused by the heat of the source of light. For this purpose, there are arranged a plurality of dichroic mirrors, for separating white light into three primary colors, liquid-crystal light bulbs of the three primary colors, and a dichroic mirror for synthesizing the image. The liquid-crystal light bulb of one color is arranged at a central portion of the housing, and the liquid-crystal light bulbs of the remaining two colors are arranged symmetrically with respect to the first one. Pixels of the two symmetrical liquid-crystal light bulbs are adjusted for their positions relative to each other with respect to pixels of liquid-crystal light bulb in the center.
Inventors:
FUJIMORI MOTOYUKI (JP)
HASHIZUME TOSHIAKI (JP)
IGUCHI KENJI (JP)
SAKAGAMI KEISUKE (US)
OKUMURA KIICHI (US)
HASHIZUME TOSHIAKI (JP)
IGUCHI KENJI (JP)
SAKAGAMI KEISUKE (US)
OKUMURA KIICHI (US)
Application Number:
PCT/JP1992/000183
Publication Date:
September 03, 1992
Filing Date:
February 21, 1992
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
International Classes:
G02B27/18; G03B33/12; G02F1/13; G02F1/1333; G02F1/1335; G03B21/00; G03B21/14; G09F9/00; H04N5/74; H04N9/31; (IPC1-7): G03B33/12
Foreign References:
| JPH02287452A | 1990-11-27 | |||
| JPH0320777A | 1991-01-29 | |||
| JPS63123019A | 1988-05-26 | |||
| JPS5288337U | 1977-07-01 | |||
| JPS63140517U | 1988-09-16 | |||
| JPS61140345U | 1986-08-30 |
Attorney, Agent or Firm:
Sato, Kazuo (Room 323 Fuji Bldg., 2-3, Marunouchi 3-chom, Chiyoda-ku Tokyo 100, JP)
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