Title:
【発明の名称】液晶プロジェクタ
Document Type and Number:
Japanese Patent JP2973494
Kind Code:
B2
Abstract:
PURPOSE:To utilize R light more effectively than G light and B light, to compensate a deficiency of R light of a light source using a discharge lamp, and to obtain an image with good color balance by spectrally diffracting and making the R light, G light, and B light incident on a 1st and a 2nd liquid crystal panel, and putting them together again and obtaining a color projection image. CONSTITUTION:In a figure, 5R is a liquid crystal panel where the R light diffracted spectrally by a dichroic mirror 2 is made incident and picture elements are formed by, for example, an active matrix system. The transmissivity of the respective picture elements (liquid crystal cell) is controlled and an R image is obtained by the liquid crystal panel 5R. Further, 5RG is a liquid crystal panel where the G light and B light are made incident and G and B color filters are formed corresponding to the respective picture elements, so that the G light is made incident on G picture elements and the B light is made incident on the B picture elements respectively. Similarly to the liquid crystal panel 5R, a G liquid crystal cell and a B liquid crystal cell are driven by the active matrix system according to a G video signal and a B video signal to output a GB composite image. Then 6 is a dichroic mirror which reflects only the R light, and consequently projection light beams from the liquid crystal panel 5R and 5GB are put together to project a color image on a screen.
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Inventors:
KOTAKE RYOTA
OGAWA MASUMI
HATANAKA MASATO
IWAMURA ATSUSHI
OGAWA MASUMI
HATANAKA MASATO
IWAMURA ATSUSHI
Application Number:
JP22255690A
Publication Date:
November 08, 1999
Filing Date:
August 27, 1990
Export Citation:
Assignee:
SONII KK
International Classes:
G03B33/12; G02B27/18; G02F1/13; H04N5/74; H04N9/31; (IPC1-7): G02B27/18; G02F1/13
Domestic Patent References:
| JP6242182A |
Attorney, Agent or Firm:
Akio Waki