Processing method for touch signal and computing device thereof

1. A processing method for a touch signal, comprising the steps of:

loading a palm rejection program staying resident on a computing device;

receiving a touch input signal from a touch panel of a touch device by a controller of the touch device;

performing a palm rejection process by the controller to the touch input signal to generate a pre-processed touch input signal, the palm rejection process eliminating parts of the touch input signal caused by a palm in real time and retaining parts of the touch input signal caused by a plurality of fingers in real time;

receiving the pre-processed touch input signal from the touch device by the computing device;

performing another palm rejection process by the palm rejection program to the pre-processed touch input signal to generate a processed touch input signal, the another palm rejection process making sure parts of the touch input signal caused by the palm are totally removed; and

instructing the touch device to output the processed touch input signal after performing the another palm rejection process.

2. The process method of claim 1 , wherein the touch device is an active matrix resistive touch device or a capacitive touch device.

3. The process method of claim 1 , further comprising:

providing the processed touch input signal, as an effective input signal for an operation system of the computing device.

4. The process method of claim 1 , further comprising:

displaying an icon of the palm rejection program in a tool bar on a screen of the computing device.

5. The process method of claim 1 , further comprising:

selectively enabling a palm rejection item according to a user instruction;

when the palm rejection item is enabled, the palm rejection program performs the another palm rejection process to the pre-processed touch input signal in real time; and

when the palm rejection item is disabled, the palm rejection program does not perform the another palm rejection process to the pre-processed touch input signal.

6. The process method of claim 5 , further comprising:

when the palm rejection item is disabled, directly providing the pre-processed touch input signal as an effective input signal for an effective input signal for an operation system of the computing device.

7. The process method of claim 1 , wherein the palm rejection process comprises:

determining whether a large area touch event of the touch device is occurred according to the touch input signal; and

eliminating the information of the touch input signal corresponding to the large area touch event in real time.

8. A computing device, comprising:

a memory unit for loading a palm rejection program, wherein the palm rejection program is a resident program;

a controller of a touch device for receiving a touch input signal and for performing a palm rejection process to the touch input signal to generate a preprocessed touch input signal;

an input interface coupled with the touch device for receiving the pre-processed touch input signal; and

a process unit coupled with the memory unit and the input interface for executing the palm rejection program so as to perform another palm rejection process to the pre-processed touch input signal to generate a processed touch input signal or for instructing the touch device to output the pre-processed touch input signal after performing the palm rejection process;

wherein the palm rejection process eliminates parts of the touch input signal caused by a palm in real time and retains parts of the touch input signal caused by a plurality of fingers in real time.

9. The computing device of claim 8 , wherein the touch device is an active matrix resistive touch device or a capacitive touch device.

10. The computing device of claim 8 , wherein the memory unit loads an operation system for instructing the process unit to operate, and the processed touch input signal is provided as an effective input signal for the operation system.

11. The computing device of claim 8 , further comprising:

a graphic unit coupled with the process unit for displaying an icon of the palm rejection program in a tool bar on a screen.

12. The computing device of claim 8 , wherein:

the process unit selectively enables a palm rejection item according to a user instruction;

when the palm rejection item is enabled, the palm rejection program performs the another palm rejection process to the pre-processed touch input signal in real time; and

when the palm rejection item is disabled, the palm rejection program does not perform the another palm rejection process to the pre-processed touch input signal.

13. The computing device of claim 12 , wherein the memory unit loads an operation system for instructing the process unit to operate so as to directly providing the pre-processed touch input signal as an effective input signal for the operation system when the palm rejection item is disabled.

14. The computing device of claim 12 , wherein the palm rejection process comprises:

determining whether a large area touch event of the touch device is occurred according to the touch input signal; and

eliminating the information of the touch input signal corresponding to the large area touch event in real time.