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:
Jun. 09, 2015
Filed:
Jun. 06, 2011
Applicants:
Chris Butler, Acton, MA (US);
Anand Budni, Karnataka, IN;
Inventors:
Chris Butler, Acton, MA (US);
Anand Budni, Karnataka, IN;
Assignee:
PRYSM, INC., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/10 (2006.01); G09G 5/02 (2006.01); G09G 3/00 (2006.01); G09G 3/02 (2006.01); G09G 3/20 (2006.01);
U.S. Cl.
CPC ...
G09G 3/02 (2013.01); G09G 3/006 (2013.01); G09G 3/2088 (2013.01); G09G 2300/026 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0693 (2013.01); G09G 2360/142 (2013.01); G09G 2360/148 (2013.01);
Abstract
A display device with multiple light sources includes a detector that dynamically measures output intensities of the light sources as the light sources are producing light to cause an image to be formed on a display screen. A controller for the display device compares the measured output intensities with desired output intensities determined from factory-calibrated correlation values and adjusts the inputs to the light sources to compensate for drift and other similar effects, so that brightness uniformity among the multiple light sources can be achieved.