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. 07, 2019
Filed:
Sep. 30, 2015
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Hideki Sato, Sakai, JP;
Takayuki Shimizu, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
Abstract
There is provided a light receiver which corrects measurement of ultraviolet rays on the basis of measurement of visible right and infrared rays. The light receiver is a light receiver () including a first light-receiving element (PD) and a second light-receiving element (PD), and a UV cutoff filter () in which transmittance of light in an ultraviolet region is lower, in which light after passage through the UV cutoff filter () enters the first light-receiving element (PD), and the first light-receiving element (PD) and the second light-receiving element (PD) are switchable between a photodiode (PD_uv) having sensitivity to the ultraviolet region and a photodiode (PD_clear) having sensitivity to a visible light region and an infrared region. Unevenness in incident light is calculated from photocurrents in photodiodes (PD_ir+PD_vis) of the first light-receiving element (PD) and the second light-receiving element (PD).