Active-matrix touchscreen
View Patent ↗An active-matrix touchscreen includes a substrate, a system controller, and a plurality of spatially separated independent touch elements disposed on the substrate. Each touch element includes a touch sensor and a touch controller circuit that provides one or more sensor-control signals to the touch sensor and receives a sense signal responsive to the sensor-control signals from the touch sensor. Each touch sensor operates independently of any other touch sensor.
1. A display, comprising:
a substrate;
a plurality of inorganic light-emitting diodes disposed exclusively on and in contact with the substrate; and
a plurality of touch sensors exclusively on and in contact with the substrate, wherein the plurality of inorganic light-emitting diodes and the plurality of touch sensors are disposed on a common surface of the substrate, wherein the touch sensors are interspersed between the inorganic light-emitting diodes over the substrate, and wherein each touch sensor comprises a control circuit for controlling the touch sensor and the control circuits are interspersed between the inorganic light-emitting diodes over the substrate.
2. The display of claim 1 , comprising:
a system controller; and
a plurality of touch controller circuits, each touch controller circuit associated with a touch sensor and disposed on the substrate for providing one or more sensor-control signals to the touch sensor and for receiving a sense signal responsive to the one or more sensor-control signals from the touch sensor, wherein each touch sensor operates independently of any other touch sensor of the plurality of touch elements, each touch controller circuit and associated touch sensor forming a touch element.
3. The display of claim 2 , wherein the touch sensor is a capacitive touch sensor and comprises one or more capacitors, each of the one or more capacitors connected to the touch controller circuit of the respective touch element.
4. The display of claim 3 , wherein the one or more capacitors are formed on the substrate.
5. The display of claim 3 , wherein the touch sensor is a self-capacitive touch sensor.
6. The display of claim 3 , wherein the touch sensor is a mutual-capacitive touch sensor having at least two electrical conductors.
7. The display of claim 2 , wherein the touch sensor is a capacitive touch sensor, an optical touch sensor, an acoustic touch sensor, an inductive touch sensor, a piezo-electric sensor, or a resistive touch sensor.
8. The display of claim 2 , wherein the substrate is a backplane substrate and the touch controller circuits are formed in or on one or more touch substrates different from the backplane substrate and the touch substrates are disposed on the backplane substrate, or wherein the substrate is a backplane substrate and the touch controller circuits are formed in or on the backplane substrate.
9. The display of claim 1 , wherein the touch sensor is a capacitive touch sensor, an optical touch sensor, an acoustic touch sensor, an inductive touch sensor, a piezo-electric sensor, or a resistive touch sensor.
10. The display of claim 1 , wherein the touch sensor is an optical touch sensor and the optical touch sensor comprises a light-sensitive semiconductor diode.
11. The display of claim 1 , wherein the area over the substrate of each touch sensor is larger than the area over the substrate of each inorganic light-emitting diode.
12. The display of claim 1 , wherein the substrate is a backplane substrate and the control circuits are formed in or on one or more touch substrates different from the backplane substrate and the touch substrates are disposed on the backplane substrate, or wherein the substrate is a backplane substrate and the control circuits are formed in or on the backplane substrate.