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Class Information
Number: 352/42
Name: Optics: motion pictures > Methods > Exhibiting > Controlling projector illumination > With color filtration
Description: Subject matter wherein the regulation and control steps comprise a color filtration of the projector light source.

Patents under this class:

Patent Number Title Of Patent Date Issued
8167432 Method to display images using metamerism to prevent illegal copy May. 1, 2012
8011791 Light-filtering module and projecting system applied therewith Sep. 6, 2011
8002442 Color filter and method for its manufacture Aug. 23, 2011
7869618 Method and system for control of a device Jan. 11, 2011
6795158 Real time answerprint timing system and method Sep. 21, 2004
5805243 Liquid crystal projector using a spatial light modulator and two rotating color filters Sep. 8, 1998
4606625 Method for colorizing black and white footage Aug. 19, 1986
4472037 Additive color means for the calibration of stereoscopic projection Sep. 18, 1984

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