Signal driving method, signal driving apparatus and touch control chip preliminary class
A signal driving method is provided. The method includes, in a first signal driving period, applying non-inverting and inverting drive signals respectively to M adjacent and N adjacent detection electrodes, where M+N≤P; and in a second signal driving period, applying the non-inverting and inverting drive signals respectively to K adjacent and L adjacent detection electrodes, where K+L≤P. P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen. M, N, K and L adjacent detection electrodes are all part of the P detection electrodes. One signal driving cycle includes at least the first and second signal driving periods in which drive signals are applied to P detection electrodes. Each P detection electrode is applied a non-inverting drive signal at least once in one signal driving cycle, and phases of the inverting and non-inverting drive signals are opposite to each other by 180 degrees.
1. A signal driving method, comprising:
in a first signal driving period, applying non-inverting drive signals to M adjacent detection electrodes and applying inverting drive signals to N adjacent detection electrodes different from the M adjacent detection electrodes, wherein M+N<P and the M adjacent detection electrodes and the N adjacent detection electrodes are all part of P detection electrodes, wherein M and N are natural numbers and P is a number of detection electrodes not greater than a number of detection electrodes on a touch control screen; and
in a second signal driving period, applying non-inverting drive signals to K adjacent detection electrodes and applying inverting drive signals to L adjacent detection electrodes different from the K adjacent detection electrodes, wherein K+L≤P and the K adjacent detection electrodes and the L adjacent detection electrodes are all part of the P detection electrodes, wherein K and L are natural numbers; wherein:
one signal driving cycle comprises at least two signal driving periods in which drive signals are applied to P detection electrodes, the at least two signal driving periods including the first signal driving period and the second signal driving period;
each of the P detection electrodes is applied a non-inverting drive signal at least once in one signal driving cycle; and
phases of the inverting drive signals are opposite to phases of the non-inverting drive signals by 180 degrees.
2. The signal driving method according to claim 1 , wherein the detection electrodes are horizontal detection electrodes or longitudinal detection electrodes, and P denotes a number of the horizontal detection electrodes or a number of the longitudinal detection electrodes.
3. The signal driving method according to claim 1 , wherein |M−N|≤Q, |K−L|≤Q, wherein Q denotes a number of detection electrodes with which no moire is caused after cancellation between the non-inverting drive signals and the inverting drive signals.
4. The signal driving method according to claim 1 , wherein M−N=K−L.
5. The signal driving method according to claim 1 , wherein:
in the first signal driving period, the non-inverting drive signals applied to the M adjacent detection electrodes and the inverting drive signals applied to the N adjacent detection electrodes cancel each other out; and
in the second signal driving period, the non-inverting drive signals applied to the K adjacent detection electrodes and the inverting drive signals applied to the L adjacent detection electrodes cancel each other out.
6. The signal driving method according to claim 1 , wherein non-inverting drive signals are applied to at least one of the P detection electrodes in two signal driving periods.
7. A signal driving method, comprising:
in a first signal driving period, applying non-inverting drive signals to M adjacent detection electrodes and applying inverting drive signals to N adjacent detection electrodes different from the M adjacent detection electrodes, wherein M+N≤P and the M adjacent detection electrodes and the N adjacent detection electrodes are all part of P detection electrodes, wherein M and N are natural numbers and P is a number of detection electrodes not greater than a number of detection electrodes on a touch control screen; and
in a second signal driving period, applying non-inverting drive signals to K adjacent detection electrodes and applying inverting drive signals to L adjacent detection electrodes different from the K adjacent detection electrodes, wherein K+L≤P and the K adjacent detection electrodes and the L adjacent detection electrodes are all part of the P detection electrodes, wherein K and L are natural numbers; wherein:
the signal driving method serves for the touch screen to send an uplink spreading signal to an active pen through the P detection electrodes and receive a downlink signal sent by the active pen through the P detection electrodes;
one signal driving cycle comprises at least two signal driving periods in which drive signals are applied to P detection electrodes, the at least two signal driving periods including the first signal driving period and the second signal driving period; and
phases of the inverting drive signals are opposite to phases of the non-inverting drive signals by 180 degrees.
8. The signal driving method according to claim 7 , wherein the detection electrodes are horizontal detection electrodes or longitudinal detection electrodes, and P denotes a number of the horizontal detection electrodes or a number of the longitudinal detection electrodes.
9. The signal driving method according to claim 7 , wherein |M−N|≤Q, |K−L|≤Q, wherein Q denotes a number of detection electrodes with which no moire is caused after cancellation between the non-inverting drive signals and the inverting drive signals.
10. The signal driving method according to claim 7 , wherein M−N=K−L.
11. The signal driving method according to claim 7 , wherein:
in the first signal driving period, the non-inverting drive signals applied to the M adjacent detection electrodes and the inverting drive signals applied to the N adjacent detection electrodes cancel each other out; and
in the second signal driving period, the non-inverting drive signals applied to the K adjacent detection electrodes and the inverting drive signals applied to the L adjacent detection electrodes cancel each other out.
12. The signal driving method according to claim 7 , wherein each of the P detection electrodes is applied a non-inverting drive signal at least once in one signal driving cycle, and non-inverting drive signals are applied to at least one of the P detection electrodes in two signal driving periods.
13. A signal driving apparatus, comprising:
a signal driving module, configured to:
in a first signal driving period, apply non-inverting drive signals to M adjacent detection electrodes and apply inverting drive signals to N adjacent detection electrodes different from the M adjacent detection electrodes, wherein M+N≤P and the M adjacent detection electrodes and the N adjacent detection electrodes are all part of P detection electrodes, wherein M and N are natural numbers and P is a number of detection electrodes not greater than a number of detection electrodes on a touch control screen; and
in a second signal driving period, apply non-inverting drive signals to K adjacent detection electrodes and apply inverting drive signals to L adjacent detection electrodes different from the K adjacent detection electrodes, wherein K+L≤P and the K adjacent detection electrodes and the L adjacent detection electrodes are all part of the P detection electrodes, wherein K and L are natural numbers;
wherein:
one signal driving cycle comprises at least two signal driving periods in which drive signals are applied to P detection electrodes, the at least two signal driving periods including the first signal driving period and the second signal driving period;
each of the P detection electrodes is applied a non-inverting drive signal at least once in one signal driving cycle; and
phases of the inverting drive signals are opposite to phases of the non-inverting drive signals by 180 degrees.
14. The signal driving apparatus according to claim 13 , wherein the detection electrodes are horizontal detection electrodes or longitudinal detection electrodes, and P denotes a number of the horizontal detection electrodes or a number of the longitudinal detection electrodes.
15. The signal driving apparatus according to claim 13 , wherein |M−N|≤Q, |K−L|≤Q, wherein Q denotes a number of detection electrodes with which no moire is caused after cancellation between the non-inverting drive signals and the inverting drive signals.
16. The signal driving apparatus according to claim 13 , wherein M−N=K−L.
17. The signal driving apparatus according to claim 13 , wherein:
in the first signal driving period, the non-inverting drive signals applied to the M adjacent detection electrodes and the inverting drive signals applied to the N adjacent detection electrodes cancel each other out; and
in the second signal driving period, the non-inverting drive signals applied to the K adjacent detection electrodes and the inverting drive signals applied to the L adjacent detection electrodes cancel each other out.
18. The signal driving apparatus according to claim 13 , wherein non-inverting drive signals are applied to at least one of the P detection electrodes in two signal driving periods.
19. A signal driving apparatus comprising a signal driving module configured to perform the signal driving method according to claim 7 .
20. A touch control chip comprising a signal driving apparatus including a signal driving module configured to perform the signal driving method according to claim 1 .