Optics: image projectors – Color filter
Reexamination Certificate
2005-06-14
2005-06-14
Smith, Arthur A (Department: 2851)
Optics: image projectors
Color filter
C353S085000, C353S097000
Reexamination Certificate
active
06905216
ABSTRACT:
The present invention relates to a method of generating an image having a desired brightness, which image is generated by means of a device provided with at least one light source, at least one electro-optical light modulation panel and at least one light-control device. The light from the light source is converted into an image having a desired brightness via at least the electro-optical light modulation panel and the light-control device. The image to be projected is analyzed in a regulator, whereafter the electro-optical light modulation panel and the light-control device are driven, while a too bright image is generated by means of the electro-optical light modulation panel, which image is converted by means of the light-control device into an image having a desired brightness and a desired contrast.
REFERENCES:
patent: 5597223 (1997-01-01), Watanabe et al.
patent: 5622418 (1997-04-01), Daijogo et al.
patent: 5675391 (1997-10-01), Yamaguchi et al.
patent: 5717422 (1998-02-01), Fergason
patent: 5806950 (1998-09-01), Gale et al.
De Vaan Adrianus J. S. M.
Stanton Douglas A.
Stroomer Martinus V. C.
Koninklijke Philips Electronics , N.V.
Smith Arthur A
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