CPC G02F 1/13338 (2013.01) [G06F 3/0444 (2019.05); G06F 3/0446 (2019.05); G06F 3/04164 (2019.05)] | 8 Claims |
1. An in-cell touch panel comprising:
a touch sensor substrate;
a pixel electrode formed on the touch sensor substrate;
a touch sensor electrode formed on the touch sensor substrate;
a counter substrate arranged to be opposed to the touch sensor substrate;
a counter substrate electrode formed on the counter substrate, the counter substrate electrode being not used in touch detection;
a liquid crystal layer arranged between the touch sensor substrate and the counter substrate;
a driving control circuit that supplies a driving signal to the touch sensor electrode;
a display control circuit that supplies a display signal to the pixel electrode;
a mode switching control circuit that switches, in a time-division manner, an operation mode of the in-cell touch panel between a display mode in which the display signal is supplied by the display control circuit to the pixel electrode, and a touch detection mode in which the driving signal is supplied by the driving control circuit to the touch sensor electrode; and
a counter substrate electrode control circuit that supplies the counter substrate electrode with a signal that is in synchronization with the driving signal and that has the same polarity as that of the driving signal in a period while the in-cell touch panel is in the touch detection mode, or causes the potential of the counter substrate electrode to be in a floating state in a period while the in-cell touch panel is in the touch detection mode.
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