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

Claim 0:
1. A touch sensing display device comprising:
a display panel including a plurality of touch electrodes and a plurality of subpixels defined by a plurality of data lines and a plurality of gate lines;
a timing controller configured to output an average data value and a touch synchronization signal in which a plurality of display driving periods and a plurality of touch driving periods are alternately time-divided;
a touch controller configured to receive the average data value from the timing controller and output a charge remover capacitance compensation value, a charge remover voltage compensation value, and a gain compensation value based on the average data value;
a power controller configured to receive the charge remover voltage from the touch controller and output a charge remover voltage based on the charge remover voltage compensation value; and
a touch driving circuit configured to receive the charge remover capacitance compensation value and the gain compensation value from the touch controller, receive the charge remover voltage from the power controller, sense a touch signal from each touch electrode and output a touch sensing value based on the charge remover voltage, the charge remover capacitance compensation value and the gain compensation value,
wherein at least one of the charge remover capacitance compensation value, the charge remover voltage compensation value, and the gain compensation value is used to adjust a variable capacitor for compensating the touch signal, and
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.