Title:
OPTICAL FILTER FOR LIQUID CRYSTAL PROJECTOR
Document Type and Number:
Japanese Patent JP3887910
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an optical filter which shields the stray light incident on the exit light side pannel surface of a liquid crystal panel.
SOLUTION: This projection liquid crystal projector separates the white light emitted from a light source by a dichroic mirror, etc., to three primary colors, modulates the light in accordance with the video signals given by liquid crystal panels disposed for each of respective colors, puts together the light by a dichroic prism 11 of a quadrangular prism shape as a whole composed by combining four pieces of triangular prisms of a rectangular equilateral triangular shape in section with each other and projects the light to a screen S. Black shadow films BS which shield the stray light exclusive of the corresponding colors emitted from the respective color incident surfaces of the dichroic prism 11 on transistors for driving liquid crystals are formed on the panel surfaces on the exit light side of the liquid crystal panels 8, 9, 10 of every color.
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Inventors:
Yoshio Yoshida
Application Number:
JP25520597A
Publication Date:
February 28, 2007
Filing Date:
September 19, 1997
Export Citation:
Assignee:
Fujitsu General Limited
International Classes:
G02B5/00; G02F1/13; G02F1/1335; G03B33/12; H04N9/31; (IPC1-7): G02F1/13; G02B5/00; G02F1/1335; G03B33/12; H04N9/31
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