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:
Mar. 24, 2015
Filed:
Oct. 20, 2010
Applicant:
Masami Endo, Kanagawa, JP;
Inventor:
Masami Endo, Kanagawa, JP;
Assignee:
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/038 (2013.01); G09G 5/00 (2006.01); G01J 1/04 (2006.01); G01J 1/32 (2006.01); H05B 33/08 (2006.01); H05B 37/02 (2006.01); G06F 3/041 (2006.01); G06F 3/042 (2006.01); H04N 1/00 (2006.01); G02F 1/133 (2006.01); G02F 1/1335 (2006.01); G02F 1/1362 (2006.01); G02F 1/137 (2006.01); H01L 27/32 (2006.01);
U.S. Cl.
CPC ...
G01J 1/04 (2013.01); G01J 1/32 (2013.01); H05B 33/0872 (2013.01); H05B 37/0218 (2013.01); G06F 3/0412 (2013.01); G06F 3/042 (2013.01); H04N 1/00129 (2013.01); Y02B 20/46 (2013.01); G02F 1/13318 (2013.01); G02F 2001/13312 (2013.01); G02F 2001/133626 (2013.01); G02F 2001/136281 (2013.01); G02F 2001/136295 (2013.01); G02F 2001/13793 (2013.01); G02F 2201/58 (2013.01); G02F 2203/30 (2013.01); G02F 2203/68 (2013.01); H01L 27/3227 (2013.01); G09G 2360/148 (2013.01);
Abstract
An object is to detect reflected light from an object accurately and to improve accuracy of capturing an image in a photosensor included in a display panel. In the display panel including a photosensor, when an image of an object is captured, light is emitted from a light source to the object and reflected light enters the photosensor. In the case where the incident light is too strong with respect to sensitivity of the photosensor, luminance of the light source is lowered. In the case where the incident light is too weak with respect to sensitivity of the photosensor, the luminance of the light source is increased.