DISPLAY DEVICE PROVIDED WITH TOUCH SENSOR

摘要

A common electrode (43) which is for display and arranged for each liquid crystal display element is also used as one electrode (drive electrode) of a pair of touch sensor electrodes, and the other electrode (detection electrode (44) for a sensor) is newly formed. Furthermore, an existing common drive signal (Vcom) as a drive signal for display is also used as a touch sensor drive signal. An electrostatic capacitance is formed between the common electrode (43) and the detection electrode (44), and touch detection is performed by using a phenomenon where the static capacitance is changed by a touch of the finger of a user. Thus, a display device is applicable to mobile apparatuses wherein potential of users are not constant in many cases. Since only the detection electrode (44) is required to be newly arranged and a touch sensor driving signal is not necessarily prepared, the configuration of the display device is permitted to be simple.