The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 2004
Filed:
Mar. 19, 2003
Shu Tomiya, Tokyo, JP;
NEC Viewtechnology Ltd., Tokyo, JP;
Abstract
A projector device made up of a digital mirror device (DMD) having several hundreds of thousand of mirror elements is provided which is capable of reducing a difference in chromaticness (tint) caused by performance/characteristic variation between filters or between light sources. The DMD projector is made up of a photosensor being placed in such a position where light reflected from each of the mirror elements in an OFF state is incident, and a correcting unit to receive a video signal and a voltage obtained by a photosensor and to output a corrected video signal to a driving unit, wherein the driving unit controls an inclination of each of mirror elements of a DMD panel according to a corrected video signal and a revolution state of a color wheel and wherein the correcting unit corrects luminance signal for each color of video signals by calculating a relative intensity of light having passed through each filter making up the color wheel using the output of a photosensor occurring when each mirror element of the DMD panel is put in the OFF state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile