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. 11, 2014
Filed:
Sep. 14, 2010
Chih-jen Tsang, Hsin-Chu, TW;
Chun-chien Liao, Hsin-Chu, TW;
Yu-lun Jhu, Hsin-Chu, TW;
Cheng-yi Lien, Hsin-Chu, TW;
Chih-Jen Tsang, Hsin-Chu, TW;
Chun-Chien Liao, Hsin-Chu, TW;
Yu-Lun Jhu, Hsin-Chu, TW;
Cheng-Yi Lien, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
An optical touch apparatus includes a light source, light guide unit, and optical detector. The light source next to the display area emits a beam. The light guide unit next to the display area and in the transmission path of the beam includes a light guide body and a Lambertian scattering structure. The light guide body has first, second, third, fourth, and light incident surfaces. The beam enters the light guide body through the light incident surface and is transmitted from the first surface to a sensing space in front of the display area. The Lambertian scattering structure is disposed on at least one of the second, third, and fourth surfaces for scattering the beam to the first surface. The optical detector next to the display area senses a change in light intensity of the beam in the sensing space. An optical touch display apparatus is also provided.