Patent ID: 11868559
Assignee: JAPAN DISPLAY INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A detection function-equipped display device comprising:
a display unit in which a plurality of pixels are disposed;
a plurality of drive electrodes disposed along a display surface of the display unit and arranged in a first direction;
a plurality of detection electrodes disposed along the display surface, arranged in a second direction different from the first direction, and facing the drive electrodes;
a potential selection circuit configured to perform switching control to switch a potential to be applied to each drive electrode between a drive potential and a non-drive potential;
a scanning circuit configured to output a scanning signal for scanning the drive electrodes;
a detection circuit configured to perform detection of a touch on the display surface based on potentials output from the detection electrodes; and
a signal selection circuit configured to supply, to the potential selection circuit, either a first signal corresponding to the scanning signal from the scanning circuit or a second signal from the detection circuit,
wherein
the switching control includes processing of applying the drive potential to one or more of the drive electrodes based on one of the first signal and the second signal and applying the non-drive potential to the other drive electrodes other than the one or more of the drive electrodes,
the detection circuit and the signal selection circuit are directly coupled to each other through a bypass line but not through the scanning circuit,
each drive electrode and the detection circuit are coupled to each other through a branch line but not through the signal selection circuit nor the potential selection circuit, and
the branch line has one end coupled to the bypass line and another end coupled to a switch configured to control a state of coupling between the detection circuit and the drive electrode.