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:
Apr. 30, 2019
Filed:
Oct. 02, 2017
Chunghwa Picture Tubes, Ltd., Taoyuan, TW;
Chunghwa Picture Tubes, LTD., Taoyuan, TW;
Abstract
The invention provides an in cell touch display device and a common voltage generating method thereof. The in cell touch display device includes a timing controller and a common voltage generator. The timing controller generates a control signal, divides a time section into a display scanning time section and a touch scanning time section according to the control signal, and divides the touch scanning time section into a touch start time section, a touch execution time section, and a touch end time section sequentially. The common voltage generator raises a common voltage to a first voltage in the touch start time section, provides a periodical pulse signal in the touch execution time section to generate the common voltage, and lowers the common voltage to a second voltage in the touch end time section, so as to improve the efficiency of touch scanning without affecting the efficiency of display scanning.