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:
Oct. 20, 2020
Filed:
Feb. 20, 2019
Applicant:
Synaptics Incorporated, San Jose, CA (US);
Inventor:
Yutaka Saeki, Tokyo, JP;
Assignee:
SYNAPTICS INCORPORATED, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 3/20 (2006.01);
U.S. Cl.
CPC ...
G09G 3/20 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0828 (2013.01); G09G 2310/027 (2013.01); G09G 2310/0291 (2013.01);
Abstract
A display driver comprises a digital-to-analog converter (DAC) configured to output a grayscale voltage corresponding to an image data. The display driver further comprises a source amplifier configured to drive a source line of a display panel, and a buffer connected between the DAC and the source amplifier. The buffer comprises a first NMOS transistor having a gate supplied with the grayscale voltage and a drain connected to a power supply. The buffer is configured to supply a current depending on a first current flowing through the first NMOS transistor to an input terminal of the source amplifier.