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:
Sep. 05, 2017
Filed:
Aug. 26, 2015
Lapis Semiconductor Co., Ltd., Yokohama, JP;
Hijiri Shirasaki, Yokohama, JP;
LAPIS SEMICONDUCTOR CO., LTD., Yokohama, JP;
Abstract
A display driver is provided which can prevent concentration of currents flowing into a display device and display a high-quality image without uneven luminance. A plurality of delayed clock signals used to apply a plurality of pixel driving voltages to data lines of the display device at respective different timings are generated by a DLL circuit including a variable delay circuit group constituted by variable delay circuits are connected in series, and a phase comparator that detects a phase difference of a delayed clock signal with respect to a reference clock signal and adjusts a delay amount of each of the variable delay circuits so that the phase difference converges to zero.