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. 04, 2020
Filed:
Dec. 26, 2018
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Yanhui Xie, Santa Clara, CA (US);
Asif Hussain, San Jose, CA (US);
Jingdong Chen, San Jose, CA (US);
Manisha P. Pandya, Saratoga, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/00 (2006.01); H05B 33/08 (2006.01); G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
H05B 33/083 (2013.01); G02F 1/133603 (2013.01); H05B 33/0815 (2013.01); G02F 2001/133612 (2013.01);
Abstract
Aspects of the subject technology relate to display of an electronic device. The display includes a backlight unit having a voltage source, a string of light-emitting diodes and a bypass switch for each light-emitting diode in the string. The string of light-emitting diodes can receive, at a first end, a supply voltage from the voltage source. The bypass switch for each light-emitting diode is controllable to pulse-width-modulate that light-emitting diode. The headroom voltage feedback circuit is coupled to a second end of the string.