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:
Dec. 30, 2003
Filed:
Jun. 30, 1999
Applicant:
Inventors:
John Barrett George, Carmel, IN (US);
Sean Patrick McPeak, Indianapolis, IN (US);
Angela Renee Burnett, Indianapolis, IN (US);
Assignee:
Thomson Licensing S.A., Boulogne Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 3/22 ; H04N 3/26 ;
U.S. Cl.
CPC ...
H04N 3/22 ; H04N 3/26 ;
Abstract
A method of operating a photo sensor in a projection display device comprises the steps of, illuminating the sensor with a projected image. Detecting a signal from the sensor responsive to the illumination by the projected image. Changing a threshold value of the detector until the signal detection ceases. Storing a value representative of the threshold value which terminated detection of the signal from the sensor.