Patent ID: 11869435
Assignee: SHARP KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 15:
16. A control method for a proximity sensor mounted on a display device,
the display device including a display unit that includes
a plurality of pixel circuits of a plurality of rows and a plurality of columns, each of the plurality of pixel circuits including a display element driven by a current,
a plurality of data signal lines configured to supply data signals to a plurality of pixel circuits in corresponding respective columns,
a plurality of scanning signal lines configured to control writing of the data signals into a plurality of pixel circuits in corresponding respective rows, and
a plurality of light-emission control lines configured to control whether to supply a current to the display element included in each of a plurality of pixel circuits in the corresponding respective rows,
the proximity sensor including
an emitting unit configured to emit infrared light from a back surface of the display unit, and
a light receiving unit configured to receive reflected light of the infrared light,
the control method comprising:
an emission starting step of starting emission of the infrared light from the emitting unit; and
an emission stopping step of stopping the emission of the infrared light from the emitting unit, wherein
in a display period during which an image is displayed on the display unit, the emission starting step and the emission stopping step are performed in such a manner that the infrared light is emitted from the emitting unit only in a period including a part of an infrared light irradiation region turn-off period during which the plurality of light-emission control lines are driven such that no current is supplied to the display element included in each of a plurality of the pixel circuits in each of rows corresponding to an infrared light irradiation region that is irradiated with the infrared light, the period being before a time point at which writing of the data signals into a plurality of pixel circuits in each of rows corresponding to the infrared light irradiation region is started.