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. 04, 2018
Filed:
Jan. 16, 2015
Flatfrog Laboratories Ab, Lund, SE;
Ola Wassvik, Rossby, SE;
Håkan Bergström, Torna Hällestad, SE;
FlatFrog Laboratories AB, Lund, SE;
Abstract
A touch-sensitive apparatus operates by light frustration (FTIR) and comprises a light transmissive panel that defines a front surface and a rear surface, a light emitter optically connected to the panel so as to generate light that propagates by total internal reflection inside the panel, and a light detector optically connected to the panel to receive propagating light from the emitter. The emitter is a VCSEL array including a number of VCSELs driven to collectively form one light emitter, and a light coupling mechanism connecting the emitter to the panel is configured to give light from a plurality of the VCSELs in the VCSEL array substantially the same spread in the panel.