US 11,868,559 B2
Detection function-equipped display device
Tadayoshi Katsuta, Tokyo (JP)
Assigned to Japan Display Inc., Tokyo (JP)
Filed by Japan Display Inc., Tokyo (JP)
Filed on Dec. 13, 2021, as Appl. No. 17/548,807.
Application 17/548,807 is a continuation of application No. PCT/JP2020/016792, filed on Apr. 16, 2020.
Claims priority of application No. 2019-113208 (JP), filed on Jun. 18, 2019.
Prior Publication US 2022/0100345 A1, Mar. 31, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G02F 1/1333 (2006.01)
CPC G06F 3/04166 (2019.05) [G02F 1/13338 (2013.01); G06F 3/0412 (2013.01); G06F 3/0446 (2019.05); G06F 3/04164 (2019.05)] 20 Claims
OG exemplary drawing
 
1. 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:
first processing of applying the drive potential, but not applying the non-drive potential, to one or more of the drive electrodes based on one of the first signal and the second signal; and
second processing of applying the non-drive potential to the other drive electrodes other than the one or more of the drive electrodes, the first processing and the second processing being performed during a detection period.