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:
Jun. 19, 2012
Filed:
Sep. 05, 2006
Andrei Cernasov, Ringwood, NJ (US);
Andrei Cernasov, Ringwood, NJ (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A liquid crystal display (LCD) device () having an integrated touchscreen includes a built-in probe signal source behind the liquid crystal (LC) layer (). The probe signal source may include a pair of light sources (and) modulated at first and second frequencies (fand f), respectively. A pair of probe light sensing devices (and) may also be implemented behind the LC layer, each configured to measure the intensities of the first and second frequencies, respectively. The probe light sensing devices are designed to detect user contact with the touchscreen surface by sensing a reflection of the probe light signals from the touchscreen surface. Using the multiple intensity measurements from each probe light sensing device, the location of the point of contact on the touchscreen surface is determined.