Patent ID: 7483005

Claim:
A display device, comprising: display elements provided in pixels formed in vicinity of signal lines and scanning lines aligned in a matrix form; a plurality of light capturing circuits; a first control line that controls an on/off operation of said display elements; and a scanning line drive circuit which drives the scanning lines, wherein each of said light capturing circuits includes, a sensor element which converts external light into an electric signal; and at least one of a second control line which controls an operation of said sensor element, wherein said scanning line drive circuit includes, a shift register including register circuits at a plurality of stages that shift a pulse signal with a prescribed pulse width in sync with pixel display timing; and a supply control circuit which controls a plurality of control signal lines based on the output signals of said shift register, wherein said sensor element is a photoelectric conversion element; each of said light capturing circuits further includes: an amplifier which amplifies an output of said photoelectric conversion element; an output control transistor which connects or interrupts an output of said amplifier to a detection line; a pre-charge transistor which initializes input of said amplifier; a second control line which controls an on/off operation of said output control transistor; and a third control line which controls an on/off operation of said pre-charge transistor, said scanning line drive circuit including a supply control circuit which controls at least two signal levels among said first, second and third control lines.