Touch circuit and touch display driver integration and control method thereof

Abstract

A touch circuit control method includes: activating the touch circuit in response to a pre-setting; outputting a touch detection signal via the touch circuit in response to the completion of the pre-setting; and deactivating the touch circuit in response to a post-setting; wherein the touch detection signal includes a first touch signal, a second touch signal, and a switching wait signal between the first touch signal and the second touch signal; wherein the first touch signal corresponds to a first portion of a plurality of touch units of the touch circuit, and the second touch signal corresponds to a second portion of the plurality of touch units.

Claims

1. A control method for a touch circuit, comprising: activating the touch circuit in response to a pre-setting; outputting a touch detection signal via the touch circuit in response to the completion of the pre-setting; and deactivating the touch circuit in response to a post-setting; wherein the touch detection signal includes a first touch signal, a second touch signal, and a switching wait signal between the first touch signal and the second touch signal; wherein the first touch signal corresponds to a first portion of a plurality of touch units of the touch circuit, and the second touch signal corresponds to a second portion of the plurality of touch units; wherein the first touch signal includes: A voltage drop portion that switches from a first potential to a second potential, and a co-drive portion that switches between the second potential and a third potential.

2. The control method of claim 1, wherein the control method is performed during a touch detection time between a first display period and a second display period.

3. The control method of claim 2, wherein during the touch detection time, display data required during the second display period is stored in at least one temporary register.

4. The control method of claim 1, in response to the switching wait signal, turns off a first multiplexer in the touch circuit corresponding to the first part of the plurality of touch units and turns on a second multiplexer corresponding to the second part of the plurality of touch units.

5. The control method of claim 1, wherein in response to the first touch signal, the first portion of the plurality of touch units performs co-drive touch detection; and wherein in response to the switching wait signal, the first portion of the plurality of touch units stops the co-drive touch detection.

6. The control method of claim 1, wherein the co-drive portion terminates at a sustaining potential, and the switching wait signal is maintained at the sustaining potential.

7. The control method as requested in item 6, wherein the range of the sustaining potential is selected from the second potential ≤ the sustaining potential ≤ the first potential.

8. The control method of claim 1, wherein the touch detection signal further includes a plurality of touch signals of number N and a plurality of switching wait signals of number N-1; wherein each of the plurality of switching wait signals is set between two adjacent touch signals.

9. A touch circuit, comprising: a plurality of touch units; and a multiplexer group; wherein, During a touch detection period between a first display period and a second display period: a first multiplexer of the multiplexer group is activated to enable a first portion of the plurality of touch units to perform a first co-drive touch detection; in response to the completion of the first co-drive touch detection, the first multiplexer is deactivated and a second multiplexer of the multiplexer group is activated to enable a second portion of the plurality of touch units to perform a second co-drive touch detection; wherein a switching wait signal exists between a first touch signal corresponding to the first co-drive touch detection and a second touch signal corresponding to the second co-drive touch detection; wherein the first touch signal includes: a voltage drop portion switching from a first potential to a second potential, and a co-drive portion switching between the second potential and a third potential.

10. The touch circuitry of claim 9, wherein in response to the switching wait signal, the first portion of the plurality of touch units stops the first co-drive touch detection.

11. The touch circuit of claim 9, wherein the co-drive portion terminates at a sustaining potential, and the switching wait signal is sustained at the sustaining potential.

12. The touch circuit of claim 11, wherein the range of the sustaining potential is selected from the second potential ≤ the sustaining potential ≤ the first potential.

13. A touch integrated display driver chip (TDDI) comprising: a touch circuit as described in any one of claims 9 to 12; and a display driver circuit connected to the touch circuit.

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