Touch sensing device

摘要

A touch sensing device includes a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines, and a touch screen driving circuit which senses all the touch sensors of the touch screen in a first sensing step to detect the presence or absence of a touch input, and then again senses the touch sensors, in which the touch input is detected as a first sensing result, in a second sensing step to detect a position of the touch input. When there is no touch sensor, in which the touch input is detected as the first sensing result, the touch screen driving circuit repeats the first sensing step.

主权项

1. A touch sensing device comprising:
a touch screen including Tx lines, Rx lines crossing the Tx lines, and touch sensors formed between the Tx lines and the Rx lines; and a touch screen driving circuit which senses all the touch sensors of the touch screen in a first sensing step to detect the presence or absence of a touch input, and then again senses the touch sensors, in which the touch input is detected as a first sensing result, in a second sensing step to detect a position of the touch input, wherein when there is no touch sensor, in which the touch input is detected as the first sensing result, the touch screen driving circuit repeats the first sensing step, wherein the first sensing step includes: a first block sensing step for sensing a voltage of touch sensors of at least two blocks divided from the touch screen and detecting the presence or absence of the touch input; a second block sensing step for dividing the block, in which the touch input is detected in the first block sensing step, into at least two sub-blocks and detecting the presence or absence of the touch input in the at least two sub-blocks; and a third block sensing step for dividing the sub-block, in which the touch input is detected in the second block sensing step, into at least two re-subdivided blocks and detecting the presence or absence of the touch input in the at least two re-subdivided blocks.