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:
May. 26, 2009
Filed:
May. 04, 2007
Hao-hsiung Lin, Taipei, TW;
Ta-chun MA, Taipei, TW;
Yu-ru Lin, Taipei, TW;
Jyun-ping Wang, Taipei, TW;
Cheng-hong Huang, Taipei, TW;
Hao-Hsiung Lin, Taipei, TW;
Ta-Chun Ma, Taipei, TW;
Yu-Ru Lin, Taipei, TW;
Jyun-Ping Wang, Taipei, TW;
Cheng-Hong Huang, Taipei, TW;
National Taiwan University, Taipei, TW;
Abstract
An ambient light sensor includes a substrate, a buffer layer formed on the substrate, an absorption layer formed on the buffer layer for absorbing the visible light, and a filter layer formed on the absorption layer for filtering infrared light and high-energy photon insensitive to human eye. The absorption layer is a PIN junction having a compositional graded intrinsic layer. The peak wavelength of responsivity spectrum of the ambient light sensor is very close to that of human eye.