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. 20, 2024
Filed:
Jun. 17, 2020
Display driver, semiconductor device, and amplifier circuit having a response-speed increase circuit
Lapis Semiconductor Co., Ltd., Yokohama, JP;
Kenichi Shiibayashi, Yokohama, JP;
LAPIS SEMICONDUCTOR CO., LTD., Yokohama, JP;
Abstract
A voltage generation unit includes first to k-th amplifiers that individually receiving first to k-th reference voltages having mutually different voltage values, individually amplify these reference voltages with gain 1, and output the reference voltages. The generation unit generates plural gradation voltages by dividing voltages between respective voltages output from the first to k-th amplifiers. A decoder unit selects one gradation voltage corresponding to the luminance level represented by the pixel data piece among the gradation voltages and generates a signal having the one gradation voltage as the drive signal for driving a display device. Each amplifier includes a response-speed increase circuit that includes at least one transistor in which a source and a back gate are connected to an output terminal of the amplifier, a predetermined electric potential is applied to a drain, and the reference voltage received by the amplifier is received at a gate.