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:
Feb. 03, 2009
Filed:
Apr. 02, 2007
Sudy Shen, Richmond Hill, CA;
Dan Praisler, Thornhill, CA;
Sudy Shen, Richmond Hill, CA;
Dan Praisler, Thornhill, CA;
Masstech Group Inc., Richmond Hill, Ontario, unknown;
Abstract
The disclosure is directed to a touch proximity sensing system detecting the presence or absence of a triggering object. The system includes a reflective optical sensor, an active surface, and a light pipe in combination. The reflective optical sensor has an emitter for creating a light and a receiver for detecting a reflected light of the emitter. The active surface is suitable for receiving the triggering object, such as a stylus or finger, or the like. The light pipe is disposed between the reflective optical sensor and the active surface. The length of the light pipe is such that the reflective optical sensor and the active surface are spaced-apart from each other. The light pipe transports the light from the emitter to the active surface. In the presence of the triggering object, light from the emitter is reflected and the light pipe transports the reflected light to the receiver.