Display device configured to operate display drive and touch sensing in time sharing manner and semiconductor device to be employed thereon

A semiconductor device configured to be connected with an in-cell type display touch panel having a plurality of common electrodes configured for display updating during a display drive period and as sensor electrodes during a touch detection period, the semiconductor device comprising:

• terminals connected with the plurality of common electrodes of the display touch panel, respectively;
• a plurality of select circuits connected with the plurality of terminals, respectively;
• a touch detection circuit;
• a reference voltage drive circuit configured to output the reference voltage to the plurality of common electrodes during the display drive period;
• a toggle drive circuit configured to supply a toggle signal to the plurality of common electrodes during the touch detection period, wherein the toggle signal alternates between a first voltage and a second voltage;
• a DC level shift circuit configured to shift the DC level of the toggle signal to the reference voltage;
• and
• a timing control circuit configured to:
• control the plurality of select circuits to supply the reference voltage output by the reference voltage drive circuit to the plurality of common electrodes via the plurality of terminals during the display drive period;
• and
• control the plurality of select circuits to supply a detection signal input from a first common electrode of the plurality of common electrodes via a first terminal of the plurality of terminals to the touch detection circuit and to synchronously supply the DC level shifted toggle signal to at least a second common electrode of the plurality of common electrodes via at least a second terminal of the plurality of terminals during the touch detection period.