Unlock method and mobile device using the same

1. A method for controlling a mobile device with a touch screen, comprising:

displaying a lock-screen image on the touch screen of the mobile device during a locked-state, wherein the lock-screen image comprises a plurality of image pieces;

detecting an object on or near the touch screen at a first predefined location corresponding to a predefined image piece of the plurality of image pieces at an initial position;

moving the predefined image piece on the touch screen according to movement of the object; and

performing a predefined function on the mobile device when the predefined image piece moves from the first predefined location to a second predefined location on the touch screen;

wherein the lock-screen image does not suggest a user to move the predefined image piece from the first predefined location to the second predefined location, and the predefined image piece, the first predefined location and the second predefined location are user-defined;

wherein the predefined function comprises modifying one or more settings of the mobile device during the locked-state.

2. The method of claim 1 , wherein the predefined function comprises unlocking the mobile device.

3. The method of claim 1 , wherein the plurality of image pieces are a plurality of rectangular image pieces.

4. The method of claim 1 , wherein the lock-screen image comprises no visual prompt for unlocking the mobile device.

5. The method of claim 1 , further comprising:

in response to detecting that the object is no longer on or near the touch screen, moving the predefined image piece back to the initial position.

6. The method of claim 1 , wherein the predefined function comprises displaying information on the lock-screen image during the locked-state.

7. A non-transitory computer-readable medium embodying a program executable in a computing device, the program comprising:

code for displaying a lock-screen image on a touch screen of the computing device during a locked-state, wherein the lock-screen image comprises a plurality of image pieces at an initial position;

code for detecting an object on or near the touch screen at a first predefined location corresponding to a predefined image piece of the plurality of image pieces;

code for moving the predefined image piece on the touch screen according to movement of the object; and

code for performing a predefined function on the computing device when the predefined image piece moves from the first predefined location to a second predefined location on the touch screen;

wherein the lock-screen image does not suggest a user to move the predefined image piece from the first predefined location to the second predefined location, and the predefined image piece, the first predefined location and the second predefined location are user-defined;

wherein the predefined function comprises modifying one or more settings of the mobile device during the locked-state.

8. The non-transitory computer-readable medium of claim 7 , wherein the predefined function comprises unlocking the mobile device.

9. The non-transitory computer-readable medium of claim 7 , wherein the plurality of image pieces are a plurality of rectangular image pieces.

10. The non-transitory computer-readable medium of claim 7 , wherein the lock-screen image comprises no visual prompt for unlocking the mobile device.

11. The non-transitory computer-readable medium of claim 7 , wherein the program further comprises:

code for, in response to detecting that the object is no longer on or near the touch screen, moving the predefined image piece back to the initial position.

12. The non-transitory computer-readable medium of claim 7 , wherein the predefined function comprises displaying information on the lock-screen image during the locked-state.

13. A touch-based mobile device, comprising:

a touch screen, for receiving touch control and displaying data;

one or more processors; and

a storage unit, for storing a program code executed by the one or more processors to perform the following steps:

displaying a lock-screen image on the touch screen during a locked-state, wherein the lock-screen image comprises a plurality of image pieces;

detecting an object on or near the touch screen at a first predefined location corresponding to a predefined image piece of the plurality of image pieces at an initial position;

moving the predefined image piece on the touch screen according to movement of the object; and

performing a predefined function on the mobile device when the predefined image piece moves from the first predefined location to a second predefined location on the touch screen;

wherein the lock-screen image does not suggest a user to move the predefined image piece from the first predefined location to the second predefined location, and the predefined image piece, the first predefined location and the second predefined location are user-defined;

wherein the predefined function comprises modifying one or more settings of the mobile device during the locked-state.

14. The mobile device of claim 13 , wherein the predefined function comprises unlocking the mobile device.

15. The mobile device of claim 13 , wherein the plurality of image pieces are a plurality of rectangular image pieces.

16. The mobile device of claim 13 , wherein the lock-screen image comprises no visual prompt for unlocking the mobile device.

17. The mobile device of claim 13 , wherein the program code is executed by the one or more processors to further perform:

in response to detecting that the object is no longer on or near the touch screen, moving the predefined image piece back to the initial position.

18. The mobile device of claim 13 , wherein the predefined function comprises displaying information on the lock-screen image during the locked-state.

19. A method for controlling a mobile device with a touch screen, comprising:

displaying a lock-screen image on the touch screen of the mobile device during a locked-state, wherein the lock-screen image comprises a plurality of image pieces;

detecting an object on or near the touch screen at a first predefined location corresponding to a predefined image piece of the plurality of image pieces at an initial position;

moving the predefined image piece on the touch screen according to movement of the object;

performing a predefined function on the mobile device when the predefined image piece moves from the first predefined location to a second predefined location on the touch screen; and

displaying a message when detecting the object on or near the touch screen at a first location to select one of the plurality of image pieces other than the predefined image piece or the predefined image piece moves to a second location other than a the second predefined location, wherein the message comprises a popup missed call;

wherein the lock-screen image does not suggest a user to move the predefined image piece from the first predefined location to the second predefined location, and the predefined image piece, the first predefined location and the second predefined location are user-defined.

20. A non-transitory computer-readable medium embodying a program executable in a computing device, the program comprising:

code for displaying a lock-screen image on a touch screen of the computing device during a locked-state, wherein the lock-screen image comprises a plurality of image pieces at an initial position;

code for detecting an object on or near the touch screen at a first predefined location corresponding to a predefined image piece of the plurality of image pieces;

code for moving the predefined image piece on the touch screen according to movement of the object;

code for performing a predefined function on the computing device when the predefined image piece moves from the first predefined location to a second predefined location on the touch screen; and

displaying a message when detecting the object on or near the touch screen at a first location to select one of the plurality of image pieces other than the predefined image piece or the predefined image piece moves to a second location other than a the second predefined location, wherein the message comprises a popup missed call;

wherein the lock-screen image does not suggest a user to move the predefined image piece from the first predefined location to the second predefined location, and the predefined image piece, the first predefined location and the second predefined location are user-defined.

21. A touch-based mobile device, comprising:

a touch screen, for receiving touch control and displaying data;

one or more processors; and

a storage unit, for storing a program code executed by the one or more processors to perform the following steps:

displaying a lock-screen image on the touch screen during a locked-state, wherein the lock-screen image comprises a plurality of image pieces;

detecting an object on or near the touch screen at a first predefined location corresponding to a predefined image piece of the plurality of image pieces at an initial position;

moving the predefined image piece on the touch screen according to movement of the object;

performing a predefined function on the mobile device when the predefined image piece moves from the first predefined location to a second predefined location on the touch screen; and

displaying a message when detecting the object on or near the touch screen at a first location to select one of the plurality of image pieces other than the predefined image piece or the predefined image piece moves to a second location other than a the second predefined location, wherein the message comprises a popup missed call;

wherein the lock-screen image does not suggest a user to move the predefined image piece from the first predefined location to the second predefined location, and the predefined image piece, the first predefined location and the second predefined location are user-defined.