US 11,874,997 B2
Display device equipped with touch panel and control method therefor
Masashi Mayumi, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 18/031,099
Filed by Sharp Kabushiki Kaisha, Sakai (JP)
PCT Filed Nov. 27, 2020, PCT No. PCT/JP2020/044204
§ 371(c)(1), (2) Date Apr. 10, 2023,
PCT Pub. No. WO2022/113265, PCT Pub. Date Jun. 2, 2022.
Prior Publication US 2023/0376148 A1, Nov. 23, 2023
Int. Cl. G09G 5/00 (2006.01); G06F 3/041 (2006.01); G09G 3/00 (2006.01); G09G 3/3233 (2016.01); H10K 59/40 (2023.01)
CPC G06F 3/04184 (2019.05) [G09G 3/006 (2013.01); G09G 3/3233 (2013.01); G09G 2310/08 (2013.01); G09G 2320/045 (2013.01); G09G 2354/00 (2013.01); H10K 59/40 (2023.02)] 12 Claims
OG exemplary drawing
 
1. A display device including: a display unit including pixel circuits of n rows×m columns (n and m are integers greater than or equal to 2), each having a display element provided between a first electrode and a second electrode and configured to emit light at luminance determined based on a drive current flowing through the second electrode from the first electrode, and a drive transistor configured to control the drive current; and a touch panel including a plurality of sensor electrodes for detecting a touch position on the display unit, the display device comprising:
a display drive circuit configured to drive the pixel circuits of n rows×m columns while performing a characteristic detection process to compensate for degradation of the drive transistor or the display element, the characteristic detection process including a process of measuring a current flowing through each pixel circuit; and
a touch panel control circuit configured to apply a touch driving signal for detecting a touch position to the plurality of sensor electrodes and to detect a touch position based on detection signals obtained from the plurality of sensor electrodes,
wherein the plurality of sensor electrodes are divided into a plurality of blocks such that each block corresponds to pixel circuits in a plurality of consecutive rows and pixel circuits in a plurality of consecutive columns,
the second electrode is divided so as to correspond to the plurality of blocks, and each of divided second electrodes is shared by a corresponding plurality of display elements, and
the touch panel control circuit applies the touch driving signal to sensor electrodes belonging to a block different from a block corresponding to pixel circuits that are targets for the characteristic detection process, during a current measurement period during which a process of measuring a current is performed, the process being included in the characteristic detection process.