Display device having a photosensor

A display device comprising a photosensor in a pixel region of an active matrix substrate,

• the photosensor comprising:
• a photodetection element that receives incident light;
• reset signal wiring that supplies a reset signal to the photosensor;
• readout signal wiring that supplies a readout signal to the photosensor;
• a storage node whose potential changes in accordance with the amount of light received by the photodetection element in a sensing period, the sensing period being from when the reset signal is supplied until when the readout signal is supplied;
• an amplification element that amplifies the potential of the storage node in accordance with the readout signal;
• a sensor switching element for reading out the potential amplified by the amplification element to output wiring as sensor circuit output;
• a light shielding film provided on a side of the photodetection element that is opposite to a light receiving face thereof;
• and
• an electrode provided opposing the light shielding film so as to form a series capacitor in series with a parasitic capacitance between the light shielding film and the photodetection element,
• wherein the electrode is electrically connected to the readout wiring.

A display device comprising a photosensor in a pixel region of an active matrix substrate,

• the photosensor comprising:
• a photodetection element that receives incident light;
• reset signal wiring that supplies a reset signal to the photosensor;
• readout signal wiring that supplies a readout signal to the photosensor;
• a storage node whose potential changes in accordance with the amount of light received by the photodetection element in a sensing period, the sensing period being from when the reset signal is supplied until when the readout signal is supplied;
• an amplification element that amplifies the potential of the storage node in accordance with the readout signal;
• a sensor switching element for reading out the potential amplified by the amplification element to output wiring as sensor circuit output;
• and
• a switching element for resetting the sensor switching element.