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:
Jun. 25, 2019
Filed:
Apr. 10, 2018
Facebook Technologies, Llc, Menlo Park, CA (US);
Matthew Christopher Appleby, Palo Alto, CA (US);
Dong Yang, Milpitas, CA (US);
Fei Liu, San Jose, CA (US);
Facebook Technologies, LLC, Menlo Park, CA (US);
Abstract
A proximity sensor system for detecting the presence of an object includes a light emitter configured to project light in a first direction, an optical element configured to steer the light, and a sensor. The optical element has a first surface configured to receive the light from the light emitter and a second surface that is non-parallel to the first surface. The second surface is configured to transmit a first portion of the light in a second direction and internally reflect a second portion of the light from the light emitter. The optical element includes a third surface configured to prevent internal reflection of the second portion of the light by the third surface. The sensor is configured to detect at least a portion of the first portion of the light returned from the object and transmitted through the second surface and the first surface of the optical element.