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:
Mar. 11, 2025
Filed:
Apr. 11, 2024
Lapis Technology Co., Ltd., Yokohama, JP;
Hiroyoshi Ichikura, Yokohama, JP;
LAPIS Technology Co., Ltd., Yokohama, JP;
Abstract
A semiconductor device includes a gradation voltage generation circuit, output amplifier circuits, a drive control circuit, and a delay time measurement circuit. The gradation voltage generation circuit converts, according to a load signal, pixel data pieces into gradation voltages and outputs the gradation voltages. The output amplifier circuits generate drive signals by individually amplifying the gradation voltages, and output the drive signals to data lines. The drive control circuit outputs the load signal to the gradation voltage generation circuit according to a horizontal synchronization signal. The delay time measurement circuit obtains, as a measured delay time, a time from receiving the measurement start signal until a voltage value of the drive signal outputted from one of the output amplifier circuits exceeds a predetermined threshold voltage. The drive control circuit shifts a timing of outputting the load signal by a difference between the measured delay time and a reference delay time.