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:
Mar. 19, 2019
Filed:
Oct. 16, 2017
Apple Inc., Cupertino, CA (US);
Mohammad J. Navabi-Shirazi, San Jose, CA (US);
Alejandro Lara Ascorra, Gilbert, AZ (US);
Asif Hussain, San Jose, CA (US);
Ji Yeoul Ryoo, Cupertino, CA (US);
Jingdong Chen, San Jose, CA (US);
Jun Qi, San Jose, CA (US);
Manisha P. Pandya, Saratoga, CA (US);
Yanhui Xie, Santa Clara, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Aspects of the subject technology relate to control circuitry for light-emitting diodes. The control circuitry may operate a light-emitting diode using a multi-peak pulse-width-modulation signal. The control circuitry may include a multi-stage driver having a relatively larger driver stage for providing a direct current through a light-emitting diode and a relatively smaller driver stage configured to cooperate with a pulse-width-modulation controller to pulse-width-modulate a current through the light-emitting diode.