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:
Jun. 06, 2023
Filed:
Feb. 17, 2022
Lapis Technology Co., Ltd., Yokohama, JP;
Koji Higuchi, Yokohama, JP;
LAPIS TECHNOLOGY CO., LTD., Yokohama, JP;
Abstract
The present invention includes a common voltage generation part, a reference gamma voltage generation part, a gamma compensation part, a gradation voltage generating circuit, and a DA conversion part. The common voltage generation part generates a common voltage by amplifying a reference common voltage and applies the common voltage to a common electrode of a display panel. The reference gamma voltage generation part generates reference gamma voltages. The gamma compensation part takes in a voltage of the common electrode as a feedback common voltage from the display panel and generates compensation reference gamma voltages in which voltage values of the respective reference gamma voltages are adjusted on the basis of a difference between the feedback common voltage and the reference common voltage. The gradation voltage generating circuit generates gradation voltages on the basis of the compensation reference gamma voltages. The DA conversion part selects a gradation voltage corresponding to a display data piece from the gradation voltages.