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. 15, 2011
Filed:
Apr. 10, 2008
Xijian Lin, Fremont, CA (US);
Zhong LI, Campbell, CA (US);
Wendy NG, San Jose, CA (US);
Phillip J. Benzel, Pleasanton, CA (US);
Oleg Steciw, Los Altos, CA (US);
Xijian Lin, Fremont, CA (US);
Zhong Li, Campbell, CA (US);
Wendy Ng, San Jose, CA (US);
Phillip J. Benzel, Pleasanton, CA (US);
Oleg Steciw, Los Altos, CA (US);
Intersil Americas Inc., Milpitas, CA (US);
Abstract
In an embodiment, a proximity sensor includes a driver, a photo-diode (PD) and an analog-to-digital converter (ADC). The proximity sensor can also include a controller to control the driver. The driver selectively drives a light source, e.g., an infrared (IR) light emitting diode (LED). The PD, which produces a current signal indicative of the intensity of light detected by the PD, is capable of detecting both ambient light and light produced by the light source that is reflected off an object. The ADC receives one or more portion of the current signal produced by the PD. The ADC produces one or more digital output that can be used to estimate the proximity of an object to the PD in a manner that compensates for ambient light detected by the PD and transient changes to the detected ambient light.