| 摘要 |
A transistor a gate of which, one of a source and a drain of which, and the other are electrically connected to a selection signal line, an output signal line, and a reference signal line, respectively and a photodiode one of an anode and a cathode of which and the other are electrically connected to a reset signal line and a back gate of the transistor, respectively are included. The photodiode is forward biased to initialize the back-gate potential of the transistor, the back-gate potential is changed by current of the inversely-biased photodiode flowing in an inverse direction in accordance with the light intensity, and the transistor is turned on to change the potential of the output signal line, so that a signal in accordance with the intensity is obtained. |
