Display device with optical sensors

A display device provided with a plurality of optical sensors, comprising:

• a display panel including two-dimensionally arranged pixel circuits and optical sensors;
• a driver circuit for performing operations of writing signals to the pixel circuits in accordance with display data and reading signals from the optical sensors in accordance with amounts of received light;
• a recognition processing portion for performing recognition processing on a recognition target image based on signals being read from the optical sensors in a normal mode, and outputting coordinate data indicating a position of a sensing target;
• a mode control portion for determining whether a mode is normal or standby and causing the recognition processing portion to operate in the normal mode or stop operating in the standby mode;
• an image storage portion for storing a comparison image based on signals being read from the optical sensors in transition from the normal mode to the standby mode;
• and
• a luminance detection portion for detecting an ambient luminance, wherein,
• the mode control portion causes transition from the standby mode to the normal mode when a new comparison image based on signals being read from the optical sensors is determined to have changed to a predetermined degree or more from the comparison image stored in the image storage portion, the predetermined degree corresponding to the ambient luminance detected by the luminance detection portion.