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. 18, 2007
Filed:
Mar. 25, 2004
Chi Mun Ho, Jalan Merbok Dua, MY;
Chin Hin Oon, Lorong Midlands, MY;
Kean Loo Kah, Jalan Batu Uban, MY;
Chi Mun Ho, Jalan Merbok Dua, MY;
Chin Hin Oon, Lorong Midlands, MY;
Kean Loo Kah, Jalan Batu Uban, MY;
Avago Technologies ECBM IP (Singapore) Pte Ltd., Singapore, SG;
Abstract
A switch panel having a touch plate, image generator, and imaging system. The touch plate includes an optically transparent layer having first and second sides. The optically transparent layer having an index of refraction greater than that of air. A light source generates a light signal that is reflected between the first and second sides of the touch plate within the transparent layer. The imaging system records an image of the first surface. An image generator displays an image that includes a plurality of button positions to a person viewing the touch plate from the first side. A portion of the light signal is reflected toward the second surface at an angle greater than the critical angle in the optically transparent layer when the first surface is touched. The imaging system determines the location of the touch from the location of the reflected light.