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:
Dec. 27, 2016
Filed:
Jun. 06, 2012
Yu Wang, Plano, TX (US);
Kerry Glover, Rockwall, TX (US);
David Mehrl, Plano, TX (US);
Greg Stoltz, Flower Mound, TX (US);
Tom Dunn, Dallas, TX (US);
Yu Wang, Plano, TX (US);
Kerry Glover, Rockwall, TX (US);
David Mehrl, Plano, TX (US);
Greg Stoltz, Flower Mound, TX (US);
Tom Dunn, Dallas, TX (US);
AMS AG, Unterpremstaetten, AT;
Abstract
An optical proximity sensor often emits light, and detects the photons in the returned light signal. Because light can be reflected and scattered by cover glass and ink layer printed on the cover glass, optical crosstalk is a concern for the optical proximity sensors. In one embodiment, the present disclosure provides an optical proximity sensor including a linear polarizer to cover the photo detector, or a polarizer to cover the light emitting device, or two polarizers to cover both the photo detector and the light emitting device. The polarizer blocks the s-polarized light and only allows the p-polarized light to pass through. Because the scattered light is predominated by the s-polarization, the optical crosstalk may be reduced.