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:
Apr. 26, 2016
Filed:
Sep. 01, 2010
Euan Smith, Longstanton, GB;
Euan Smith, Longstanton, GB;
CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, Cambridgeshire, GB;
Abstract
A touch screen display device includes a plurality of display pixels for generating an image, emitters interspersed among the display pixels and emitting light, and detectors interspersed among the display pixels for detecting light. The light from the emitters is coupled into a transparent substrate to reach the front surface which transmits light incident at an angle smaller than a critical angle and which totally internally reflects light which is incident at an angle greater than the critical angle. The display device further includes processing means coupled to the emitters and detectors for detecting the light reaching each detector from different specific emitters and determining the light that is received by each detector that may be due to direct reflection from a near-field object, and the light that is totally internally reflected and which may be frustrated by a touching object.