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:
Feb. 17, 1998
Filed:
Jan. 07, 1997
Applicant:
Inventor:
Vadlamannati Venkateswar, Plano, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; G01D / ;
U.S. Cl.
CPC ...
358298 ; 358300 ; 358455 ; 347239 ;
Abstract
A method for printing grayscale images that compensates for problems in the printing process. The presence of a defective element on a spatial light modulator (12) is compensated for with use of a white balancing area. If a column of the modulator (12) has an element stuck ON, a corresponding element in the same column in the white balancing area is turned OFF while all other columns have elements that are ON. If the illumination is non-uniform, the exposure values of each element are multiplied by an efficiency factor which compensates for the non-uniformity.