Patent ID: 9612702
Date: 2017-04-04
CPC Classifications: G02F,G06F

Claim:
1. An electromagnetic-type touch substrate, comprising: a substrate comprising a display region and a non-display region; a first conductive layer formed on one side of the substrate, wherein the first conductive layer comprises a plurality of first electromagnetic induction coils which extend in a first direction and form loops; a second conductive layer formed on the other side of the substrate, wherein the second conductive layer comprises a plurality of second electromagnetic induction coils which extend in a second direction and form loops, wherein the second direction is perpendicular to the first direction; a first control circuit electrically connected to one side of the first electromagnetic induction coils, and a second control circuit electrically connected to one side of the second electromagnetic induction coils, wherein the first control circuit comprises a plurality of first transistors, a first control wire for controlling states of the first transistors, a first signal wire and a plurality of first detecting units, and gate electrodes of the first transistors are electrically connected to the first control wire, wherein the source electrodes of the first transistors are electrically connected to the first signal wire, and the drain electrodes of the first transistors are electrically connected to one side of the first electromagnetic induction coils and to the first detecting units; or, the drain electrodes of the first transistors are electrically connected to the first signal wire, and the source electrodes of the first transistors are electrically connected to one side of the first electromagnetic induction coils and to the first detecting units; wherein the second control circuit comprises a plurality of second transistors, a second control wire for controlling states of the second transistors, a second signal wire and a plurality of second detecting units, and gate electrodes of the second transistors are electrically connected to the second control wire; wherein the source electrodes of the second transistors are electrically connected to the second signal wire, the drain electrodes of the second transistors are electrically connected to one side of the second electromagnetic induction coils and to the second detecting units; or, the drain electrodes of the second transistors are electrically connected to the second signal wire, and the source electrodes of the second transistors are electrically connected to one side of the second electromagnetic induction coils and to the second detecting units; wherein in the case that a touch is detected, the first control wire controls all the first transistors to turn off, the first electromagnetic induction coils are independent from each other, electromagnetic induction currents are generated in the first electromagnetic induction coils which are electromagnetic induced, the electromagnetic induction currents are detected by the first detecting unit, and a coordinate of a touch position in the second direction is determined and its output is provide; the second control wires controls all the second transistors to turn off, the second electromagnetic induction coils are independent from each other, electromagnetic induction currents are generated in the second electromagnetic induction coils which are electromagnetic induced, the electromagnetic induction currents are detected by the second detecting unit, and a coordinate of the touch position in the first direction is determined and its output is provided.