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US 10,474,293 B2Granted
Signal processing method and touch sensing system using the same
AssigneeNovatek Microelectronics Corp.
InventorsHung-Cheng Kuo, Yung-Fu Lin, Chun-Hung Chen, Ting-Hsuan Hung
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Abstract
A signal processing method for a touch panel includes transmitting a first driving signal to a first touch channel of the touch panel; and transmitting a second driving signal to a second touch channel of the touch panel, wherein the second touch channel is neighboring to the first touch channel. The first driving signal is substantially identical to the second driving signal during a first period, and the first driving signal is substantially inverse to the second driving signal during a second period neighboring to the first period.
Claims16
A signal processing method for a touch panel, comprising:
- transmitting a first driving signal to a first touch channel of the touch panel;
- and
- transmitting a second driving signal to a second touch channel of the touch panel, wherein the second touch channel is neighboring to the first touch channel;
- wherein the first driving signal is substantially identical to the second driving signal during a first period, and the first driving signal is substantially inverse to the second driving signal during a second period neighboring to the first period;
- wherein a border between the first period and the second period is within a guard time, in which reception of sensing signals corresponding to the first driving signal and the second driving signal is interrupted.
2 more elements
A touch sensing system, comprising:
- a touch panel, comprising a first touch channel and a second touch channel neighboring to the first touch channel;
- a first driver, coupled to the touch panel, for transmitting a first driving signal to the first touch channel to generate a first sensing signal;
- a second driver, coupled to the touch panel, for transmitting a second driving signal to the second touch channel to generate a second sensing signal;
- and
- a differential receiver, coupled to the touch panel, for receiving the first sensing signal from the first touch channel and receiving the second sensing signal from the second touch channel, to obtain a touch sensing result by subtracting the second sensing signal from the first sensing signal;
- wherein the first driving signal is substantially identical to the second driving signal during a first period, and the first driving signal is substantially inverse to the second driving signal during a second period neighboring to the first period;
- wherein a border between the first period and the second period is within a guard time, in which reception of sensing signals corresponding to the first driving signal and the second driving signal is interrupted.
4 more elements
A signal processing method for a touch panel, comprising:
- transmitting a first driving signal to a first touch channel of the touch panel;
- and
- transmitting a second driving signal to a second touch channel of the touch panel, wherein the second touch channel is neighboring to the first touch channel;
- wherein the first driving signal and the second driving signal have different phases during a first period;
- wherein a border between the first period and a second period is within a guard time, in which reception of sensing signals corresponding to the first driving signal and the second driving signal is interrupted.
2 more elements
A signal processing method for a touch panel, comprising:
- transmitting a first driving signal to a first touch channel of the touch panel;
- transmitting a second driving signal to a second touch channel of the touch panel, wherein the second touch channel is neighboring to the first touch channel;
- obtaining a first sensing signal corresponding to the first driving signal;
- obtaining a second sensing signal corresponding to the second driving signal;
- generating a differential signal according to a difference between the second sensing signal and the first sensing signal;
- demodulating the differential signal with the first driving signal to generate a first output signal corresponding to the first touch channel;
- demodulating the differential signal with the second driving signal to generate a second output signal corresponding to the second touch channel;
- and
- stopping receiving the first sensing signal and the second sensing signal during a guard time, in which at least one of the first sensing signal and the second sensing signal has a status transition;
- wherein the first driving signal is substantially identical to the second driving signal during a first period, and the first driving signal is substantially inverse to the second driving signal during a second period neighboring to the first period.
7 more elements
A signal processing method for a touch panel, comprising:
- transmitting a first driving signal to a first touch channel of the touch panel to generate a first sensing signal;
- and
- transmitting a second driving signal to a second touch channel of the touch panel to generate a second sensing signal, wherein the second touch channel is neighboring to the first touch channel;
- and
- generating a differential signal according to a difference between the second sensing signal and the first sensing signal, and demodulating the differential signal;
- wherein the first driving signal is substantially identical to the second driving signal during a first period, and the first driving signal is substantially inverse to the second driving signal during a second period neighboring to the first period.
3 more elements
Dependencies are inferred from the claim text.