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:
Nov. 24, 2020
Filed:
May. 12, 2017
Fingerprint Cards Ab, Gothenburg, SE;
Patrick Smith, San Jose, CA (US);
Paul Wickboldt, San Jose, CA (US);
Marek Mienko, San Jose, CA (US);
Pascale El Kallassi, San Jose, CA (US);
FINGERPRINT CARDS AB, Gothenburg, SE;
Abstract
An input device includes a transparent layer having a top surface and a bottom surface, and an inner layer positioned below and directly contacting the bottom surface of the transparent layer, wherein the inner layer has a second index of refraction (n) that is lower than a first index of refraction (n) of the transparent layer, and wherein a first region of the transparent layer extends past an end of the inner layer. The device also includes a light source positioned below the bottom surface of the transparent layer, and a reflector arrangement configured to reflect light emitted by the light source into the transparent layer in or proximal to the first region of the transparent layer, wherein at least a portion of the light reflected into the transparent layer propagates within the transparent layer by total internal reflection.