Touch sensing device

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.