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. 10, 2020
Filed:
Jun. 29, 2018
Applicant:
Novatek Microelectronics Corp., Hsinchu, TW;
Inventors:
I-Te Liu, Hsinchu County, TW;
Wei-Zen Chen, Hsinchu, TW;
Assignee:
Novatek Microelectronics Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/041 (2006.01); G06F 3/044 (2006.01); H03K 17/96 (2006.01); H04N 5/378 (2011.01);
U.S. Cl.
CPC ...
G06F 3/044 (2013.01); G06F 3/04166 (2019.05); G06F 3/04182 (2019.05); G06F 3/041 (2013.01); G06F 3/0416 (2013.01); G06F 3/0418 (2013.01); H03K 17/962 (2013.01); H04N 5/378 (2013.01);
Abstract
A readout circuit of a touch panel is provided. The readout circuit includes a charge modulator and a correlated double sampling demodulator. The charge modulator is configured to provide a driving current to charge or discharge a sensing electrode of the touch panel and generate a sensing voltage signal. The correlated double sampling demodulator is coupled to the charge modulator. The correlated double sampling demodulator is configured to sample the sensing voltage signal to obtain a voltage variation when a touch event happens. A method for driving the touch panel is also provided.