Patent ID: 11874997
Assignee: SHARP KABUSHIKI KAISHA
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A control method for 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, wherein
the display device includes:
the display unit;
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,

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,
the control method comprises:
an image writing step of allowing the display drive circuit to operate so that a data signal based on an image to be displayed on the display unit is written to each pixel circuit;
a characteristic detecting step of allowing the display drive circuit to operate so that the characteristic detection process is performed; and
a touch position detecting step of allowing the touch panel control circuit to operate so that detection of a touch position is performed,

the detection of a touch position in the touch position detecting step is performed during a period during which currents are measured in the characteristic detecting step, and
in the touch position detecting step, the touch driving signal is applied to sensor electrodes belonging to a block different from a block corresponding to pixel circuits that are targets for the characteristic detection process.