Patent ID: 8730208

Claim:
A touch screen apparatus comprising: a touch screen comprising Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines; and a touch screen drive circuit that supplies a drive signal to the Tx lines, and samples voltages of the touch sensors received through the Rx lines and converts the sampled voltages into digital data, wherein the touch screen drive circuit performs a setup operation for selecting Tx lines to be supplied with the drive signal and Rx lines to receive the voltages of the touch sensors, a sensing operation for supplying a drive signal to the Tx lines and receiving and sampling touch sensor voltages through the Rx lines, an ADC operation for converting the sampled voltages into digital data, a coordinate detection operation for analyzing the digital data by a preset touch detection algorithm and estimating the coordinates of a touch input position, and a data transmission operation for transmitting touch coordinate data comprising the coordinates to an external system, and the touch screen drive circuit performs at least two operations among the setup operation, the sensing operation, and the ADC operation in parallel.