LG Display Co., Ltd.
Touch circuit, touch driving circuit, touch display device, and method for driving touch circuit for reducing initialization speed and minimizing loss of touch sensing data during malfunction

Abstract:

A touch display device includes a touch panel on which a plurality of touch electrodes is disposed; and a touch circuit configured to output a touch driving signal of a pulse type to the touch panel and to sense occurrence of touch or a touch position according to a touch synchronization signal for defining a touch period, wherein the touch circuit is configured to receive the sensing data to sense occurrence of touch or a touch position and to determine whether the touch driver malfunctions, and to output a simplified initialization command to the touch driver when it is determined that the touch driver malfunctions, and the touch driver is initialized with a pre-stored set value maintained not changed upon receiving the simplified initialization command.