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:
Jan. 17, 2012
Filed:
May. 27, 2011
Tom Chang, Los Alto, CA (US);
Andrew Grzegorek, San Jose, CA (US);
Chongmei Zhang, Cupertino, CA (US);
Tom Chang, Los Alto, CA (US);
Andrew Grzegorek, San Jose, CA (US);
Chongmei Zhang, Cupertino, CA (US);
Eminent Electronic Technology Corp., Hsinchu, TW;
Abstract
A circuit for implementing an ambient light sensing mode and a proximity sensing mode includes a light sensor, a light source, and a controller coupled to the light sensor and the light source. The controller is configured to process outputs from the light sensor before and after the light source is energized to obtain an ambient light level output and to compare the ambient light level output with an output from the light sensor when the light source is energized to implement the proximity sensing mode.