SEMICONDUCTOR DEVICE, TOUCH PANEL, AND ELECTRONIC DEVICE

摘要

A source line through which a video signal is transmitted also serves as a driving electrode of a touch sensor. To perform display, a video signal is transmitted to the source line. To sense the touch, a driving signal is transmitted to the source line. A circuit for transmitting the video signal and the driving signal to the source line has a structure in which a period for transmitting the driving signal is added in the wiring through which the digital video signal is transmitted and the output to the source line is switched by using a switching circuit. Alternatively, the circuit has a structure in which a period for transmitting the driving signal is added in a wiring through which a latch signal is transmitted and the output to the source line is switched.

主权项

1. A semiconductor device comprising:
a first wiring; a second wiring; a first circuit; and a second circuit, wherein the first wiring has a function of transmitting a video signal to a pixel, wherein the first circuit is electrically connected to the second wiring, wherein the first circuit has a function of sensing a change in capacitance between the first wiring and the second wiring, wherein the second circuit is electrically connected to the first wiring, and wherein the second circuit is capable of switching between a function of outputting the video signal and a function of outputting a driving signal for sensing the change in capacitance.