Patent ID: 8436835

Claim:
A substrate with touch function, comprising: a plurality of gate lines disposed on the substrate; at least one touch device disposed on the substrate, the touch device comprising: a power line disposed on the substrate; at least one readout line disposed on the substrate and correspondingly intersecting with the gate lines; a photo sensor disposed adjacent to a location where a specific gate line of the gate lines and a specific readout line of the at least one readout line intersect, the photo sensor comprising: a readout switch, comprising: a first route terminal; a second route terminal electrically coupled to the specific readout line; and a first control terminal electrically coupled to the specific gate line; and a photosensitive switch, comprising: a third route terminal; a fourth route terminal electrically coupled to the first route terminal; and a second control terminal electrically coupled to the power line; and a readout driving unit electrically coupled to the specific readout line; wherein, the third route terminal of the photosensitive switch is electrically coupled to a predetermined gate line of the gate lines except the specific gate line such that the first control terminal of the readout switch and the third route terminal of the photosensitive switch are electrically coupled with two different gate lines respectively, and the predetermined gate line and the power line supply voltages to the third route terminal and the second control terminal of the photosensitive switch, such that a voltage difference between the third route terminal and the second control terminal of the photosensitive switch is always lower than a threshold voltage of the photosensitive switch.