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:
Apr. 10, 2018
Filed:
Oct. 05, 2011
Shawn Robert Gettemy, San Jose, CA (US);
Joshua Grey Wurzel, Sunnyvale, CA (US);
Jean-pierre Simon Guillou, San Francisco, CA (US);
Ming Xu, Cupertino, CA (US);
David Andrew Doyle, San Francisco, CA (US);
Shawn Robert Gettemy, San Jose, CA (US);
Joshua Grey Wurzel, Sunnyvale, CA (US);
Jean-Pierre Simon Guillou, San Francisco, CA (US);
Ming Xu, Cupertino, CA (US);
David Andrew Doyle, San Francisco, CA (US);
APPLE INC., Santa Clara, CA (US);
Abstract
The present disclosure generally relates to systems and techniques for calibrating displays to improve the white point uniformity between similar type devices. In one embodiment, a backlight includes multiple strings of LEDs, where each string is driven by a separate driver, or driver channel. Each string may be separately tested at a base current to determine its emitted chromaticity, and values indicative of the emitted chromaticities may be stored within the backlight as calibration values. The calibration values may then be used to determine the driving strength for each string that allows the display to produce the target white point when the light from the strings is mixed. Further, in certain embodiments, adjustments also may be made to the LCD panel based on the emitted chromaticities at the base current.