DISPLAY DEVICE Russian patent published in 2014 - IPC G06F3/42 H01L27/146 G02F1/133 

FIELD: physics, optics.

SUBSTANCE: invention relates to a display device equipped with an optical sensor in a pixel region. Display device has optical sensor having a highly sensitive photosensitive element. The photosensitive element is provided with a diode (D1), reset signal wiring (RST) that supplies a reset signal, readout signal wiring (RWS) that supplies a readout signal, a storage node whose potential (V_INT) changes in accordance with the amount of light received by the diode (D1) in the period from when the reset signal is supplied until when the readout signal is supplied, an amplification element (C1) that amplifies the potential (V_INT) in accordance with the readout signal, and a sensor switching element (M2) for reading out the potential amplified in the output wiring. The potential of the screening film (LS), provided on the back surface of the diode, is fixed equal to a constant potential (V_LS) which satisfies the following relationship: V_LS≥V_RST.H.

EFFECT: high sensitivity and high signal-to-noise ratio in a photosensor.

17 cl, 63 dwg