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. 28, 2017
Filed:
Jan. 16, 2014
Applicant:
Flatfrog Laboratories Ab, Lund, SE;
Inventor:
Ola Wassvik, Brosarp, SE;
Assignee:
FLATFROG LABORATORIES AB, Lund, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/36 (2006.01); G06F 3/042 (2006.01); G02F 1/1333 (2006.01);
U.S. Cl.
CPC ...
G06F 3/042 (2013.01); G02F 1/13338 (2013.01); G06F 3/0428 (2013.01); G06F 2203/04109 (2013.01);
Abstract
A touch-sensing display panel, comprising an LCD unit including a backlight and a plurality of image-forming pixel elements arranged in a central region. A planar light guide with a first refractive index has a front surface forming a touch-sensing region and an opposite rear surface facing the LCD unit. A plurality of light emitters are emulated by passing light from the backlight through pixel elements of first selected portions of a peripheral region of the LCD unit into the light guide for propagation therein through total internal reflection, and a plurality of light detectors are connected to receive light from the light guide.