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. 09, 2014
Filed:
Jan. 06, 2010
Paul M. Thompson, San Jose, CA (US);
Floriano Kim, Saratoga, CA (US);
Mark A. Yoshimoto, San Jose, CA (US);
Paul M. Thompson, San Jose, CA (US);
Floriano Kim, Saratoga, CA (US);
Mark A. Yoshimoto, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A method and system for modifying the pulse width modulation frequency for controlling the backlit illumination intensity of a liquid crystal display. The modified pulse width modulation frequency may be selected to reduce distortion in the display while allowing for a wide range of dimming settings for the display. A pulse width modulation signal may be also be phase shifted such that a string of light sources may be sequentially activated to generate a effective frequency greater than that of the frequency of the pulse width modulation signal.