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:
Apr. 06, 2010
Filed:
Aug. 12, 2004
Hiroaki JO, Suwa, JP;
Hiroshi Horiuchi, Matsumoto, JP;
Toshiyuki Kasai, Okaya, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
To provide an electro-optical device, a driving method therefor, and an electronic apparatus which can accurately control the brightness of electro-optical elements in accordance with the signal level of a data signal. A brightness detection circuitis provided which samples power-supply current Io every time one scan line is selected and which converts the power-supply current Io into a digital voltage signal DS having a digital value corresponding to the power-supply current Io. A light-emission-period control circuitgenerates light-emission-period control signals Hto Hn in accordance with a light-emission-period adjusting signal F corresponding to the digital voltage signal DS and outputs the light-emission-period control signals Hto Hn to corresponding control-signal supply lines Gto Gn. Further, light-emission-period control transistors of the pixelswhich are connected to the corresponding control-signal supply lines Gto Gn are on/off controlled, thereby controlling the light-emission period of the electro-optical elements.