Signal processing apparatus, signal processing method and selection method of user interface icon for multi-touch panel

1. A signal processing method of a man-machine interface, applied to a multi-touch panel, comprising steps of:

receiving a first touch signal;

recognizing an object corresponding to the first touch signal;

determining whether a second touch signal is received while receiving the first touch signal;

selecting the object corresponding to the first touch signal when receiving the second touch signal; and

generating the second touch signal when a random position on the multi-touch panel is touched while receiving the first touch signal.

2. The signal processing method as claimed in claim 1 , wherein the first touch signal is generated by a finger or a touch pen through touching the multi-touch panel.

3. The signal processing method as claimed in claim 2 , wherein the step of recognizing the object corresponding to the first touch signal comprises:

identifying a touched position on the multi-touch panel according to the first touch signal; and

recognizing the object corresponding to the touched position.

4. The signal processing method as claimed in claim 2 , wherein the first touch signal disappears when the finger or the touch pen separates away from a surface of the multi-touch panel.

5. The signal processing method as claimed in claim 1 , the method further comprising a step of:

displaying the object with a second display state when the object corresponds to the first touch signal; wherein the object is displayed with a first display state on a display screen before corresponding to the first touch signal, and the first display state is different from the second display state.

6. The signal processing method as claimed in claim 1 , wherein the object is a user interface icon.

7. A signal processing apparatus of a man-machine interface, comprising:

a multi-touch panel for receiving a first touch signal and a second touch signal;

a recognizing module, for recognizing an object corresponding to a first touch signal received at the multi-touch panel; and

a processing module, coupled to the recognizing module, for selecting the object when receiving a second touch signal while the recognizing module recognizing the object;

wherein the second touch signal is generated when a random position on the multi-touch panel is touched while the recognizing module is recognizing the object.

8. The signal processing apparatus as claimed in claim 7 , wherein the first touch signal is generated by a finger or a touch pen through touching the multi-touch panel.

9. The signal processing apparatus as claimed in claim 8 , wherein the first touch signal disappears when the finger or the touch pen separates away from a surface of the multi-touch panel.

10. The signal processing apparatus as claimed in claim 7 , wherein the multi-touch panel is provided on a surface of a display screen, and the recognizing module identifies a touched position of the multi-touch panel according to the first touch signal, and recognizes the object corresponding to the touched position.

11. The signal processing apparatus as claimed in claim 10 , wherein the object is displayed on the display screen.

12. The signal processing apparatus as claimed in claim 11 , wherein the object is displayed with a first display state on the display screen when the object does not correspond to the first touch signal, and the processing module controls the display screen to display the object with a second display state that is different from the first display state when the object corresponds to the first touch signal.

13. The signal processing apparatus as claimed in claim 12 , wherein the object is a user interface icon.

14. A method of selecting a user interface icon among a plurality of icons, applied to a multi-touch panel, comprising steps of:

receiving a first touch signal;

recognizing the user interface icon corresponding to the first touch signal among the icons; and selecting the user interface icon corresponding to the first touch signal when receiving a second touch signal while recognizing the user interface icon; and

generating the second touch signal when a random position on the multi-touch panel is touched while receiving the first touch signal.

15. The method as claimed in claim 14 , wherein the step of recognizing the user interface icon corresponding to the first touch signal comprises:

identifying a touched position on the multi-touched panel according to the first touch signal; and

recognizing the user interface icon corresponding to the touched position.

16. The method as claimed in claim 15 , further comprising a step of:

generating the second touch signal when a random position on the multi-touch panel is touched while recognizing the user interface icon corresponding to the first touch signal.

17. The method as claimed in claim 14 , the method further comprising a step of:

displaying the user interface icon with a second display state when the user interface icon corresponds to the first touch signal;

wherein the user interface icon is displayed with a first display state on a display screen before corresponding to the first touch signal, and the first display state is different from the second display state.