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:
Aug. 07, 2018
Filed:
Sep. 02, 2015
Joled Inc., Tokyo, JP;
Hirofumi Nakagawa, Tokyo, JP;
JOLED INC., Tokyo, JP;
Abstract
A source driver circuit is provided that supplies, to each of pixels arranged in a matrix, an electrical signal corresponding to a pixel signal. The source driver circuit includes a reference voltage generating unit, which includes a plurality of resistors connected in series, and a resistor, for gradation voltage generation that divides an input voltage into voltages of magnitudes. The source driver circuit also includes a gradation voltage generating circuit, which is connected between the plurality of resistors and is also connected between the plurality of resistors and the resistor for gradation voltage generation, that includes an offset-canceling amplifier. The offset-canceling amplifier alternates between an offset extraction state, in which an offset voltage of the offset-canceling amplifier is extracted, and a buffer output state, in which the offset voltage is added to the pixel signal and outputted.