Patent ID: 11861111
Assignee: LG DISPLAY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. A driving method of a touch sensing display device, the driving method comprising:
storing charge remover capacitance compensation values, charge remover voltage compensation values, and gain compensation values according to average data values in a lookup table;
outputting a touch synchronization signal and an average data value in which a plurality of display driving periods and a plurality of touch driving periods are alternately time-divided;
outputting a charge remover capacitance compensation value, a charge remover voltage compensation value, and a gain compensation value according to the average data value;
outputting a charge remover voltage according to the charge remover voltage compensation value; and
varying a capacitance of a charge remover capacitor according to the charge remover capacitance compensation value;
varying a capacitance of a feedback capacitor according to the gain compensation value;
amplifying a touch signal from each touch electrode according to the charge remover voltage, the varied capacitance of the charge remover capacitor and the varied capacitance of the feedback capacitor; and
outputting a touch sensing value,
wherein the charge remover capacitance compensation value, the charge remover voltage compensation value and the gain compensation value are set to be low when the average data value is a low grayscale, and are set to be high when the average data value is a high grayscale.