Lg Display Co., Ltd.

Hankyu Yang

SungUk Byun

Woorim Jeong

Jeongseop Lee

A touch display device may include a touch display panel including touch electrodes, data lines, gate lines, sensing lines, and sub-pixels; a data driving circuit connected to the data lines; a gate driving circuit connected to the gate lines; and a touch sensing circuit configured to output a touch driving signal to at least one touch electrode among the touch electrodes through at least one corresponding sensing line among the sensing lines. A first driving signal may be configured to be applied to at least one of the data lines while the touch driving signal is output to the at least one touch electrode. The first driving signal may have a same frequency as the touch driving signal and may have a phase difference from the touch driving signal.

Touch display device including a touch sensing circuit

Embodiments of the present disclosure relate to a touch display device and a touch sensing circuit that apply a load-free driving signal having a phase difference or amplitude difference from the touch driving signal to a touch display panel. According to embodiments of the present disclosure, electromagnetic noise immunity may be improved and touch accuracy may be increased. The touch sensing circuit comprises: a touch driving circuit configured to output a pulse type touch driving signal to at least one of a plurality of touch electrodes disposed on a touch display panel; and a load-free driving signal output circuit configured to output at least one load-free driving signal having a frequency equal to a frequency of the touch driving signal and having a phase difference or amplitude difference from the touch driving signal.

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Paju-si, South Korea

Hankyu Yang