Patent ID: 9390667
Filing Date: 2016-07-12
CPC Classification: G06F,G09G

Claim Text:
1. A method for driving an input-output device comprising a light-emitting device and a plurality of photodetectors arranged in matrix, wherein each of the plurality of photodetectors comprises a photoelectric conversion element, a first transistor, a second transistor, and a third transistor, wherein a first terminal of the photoelectric conversion element is electrically connected to a first terminal of the first transistor, wherein a second terminal of the first transistor is electrically connected to a gate of the second transistor, wherein a first terminal of the second transistor is electrically connected to a first terminal of the third transistor, wherein the first transistor comprises a channel formation layer comprising an oxide semiconductor, the method comprising the steps of: in each of a first frame period and a second frame period, in the first sub frame period of the first frame period, inputting a first output selection signal generated by a shift register to a gate of the third transistor of each of the plurality of photodetectors selected by the first output selection signal to output the first data of the corresponding one of the plurality of photodetectors after the step of inputting the first photodetection control signal; in one of the second sub frame period to the third sub frame period of the second frame period, inputting a second output selection signal generated by the shift register to the gate of the third transistor of each of the plurality of photodetectors selected by the second output selection signal to output the second data of the corresponding one of the plurality of photodetectors after the step of inputting the second photodetection control signal, wherein the second photodetection control signal is the next signal of the first photodetection control signal input to the gate of the first transistor of all of the plurality of photodetectors.