METHOD FOR UNLOCKING TOUCH SCREEN, ELECTRONIC DEVICE THEREOF, AND RECORDING MEDIUM THEREOF

• US 20140145990A1
• Filed: 11/27/2013
• Published: 05/29/2014
• Est. Priority Date: 11/29/2012
• Status: Active Grant

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: HO, SHUN-LUNG
• Granted Patent: US 9,389,762 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0484 for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A method for unlocking touch screen, electronic device thereof, and recording medium thereof are disclosed. A graph with a boundary is displayed on a touch screen. Then two fingers touch the outside, the inside or the boundary of the graph and move outward or inward separately. Whether the touch screen of the electronic device is unlocked is determined based on whether the distance between the moved two fingers is larger or smaller than a default value, or whether the distance difference between the two fingers before and after moving is larger than a default value.

Claims

1. An electronic device for unlocking a touch screen, comprising:

the touch screen; and

a processor, executing the following operations;

determining a first relative distance between two touch signals when the two touch signals are determined by the touch screen;

determining a second relative distance between the two touch signals after at least one of the two touch signals moves; and

unlocking the touch screen, which is locked, when a difference between the first relative distance and the second relative distance is larger than a default value.

2. The electronic device of claim 1, wherein before the touch screen detects the two touch signals, the processor further executes the following operation of displaying a graph with a boundary while the touch screen, which is locked, detects at least one touch signal.

3. The electronic device of claim 2, wherein the processor further executes the following operation of vanishing the graph while the processor unlocks the touch screen.

4. The electronic device of claim 2, wherein the processor controls that the boundary changes with the moving track of the two touch signals as one of the following states:

the processor controls that the diameter of the boundary decreases step by step with the decrease of the second relative distance when the first relative distance is larger than the second relative distance; and

the processor controls that the diameter of the boundary increases step by step with the increase of the second relative distance when the first relative distance is smaller than the second relative distance.

5. The electronic device of claim 4, wherein before the two signals touch the boundary, the processor controls that the boundary changes with the moving track of the two touch signals.

6. The electronic device of claim 5, wherein the changing rate of the boundary equals to the changing rate of the second relative distance.

7. The electronic device of claim 4, wherein before the two touch signals touch the boundary, the processor maintains the diameter of the boundary;

and while the two touch signals touch the boundary, the processor starts to determine the first relative distance, and then controls that the boundary changes with the moving track of the two touch signals.

8. The electronic device of claim 7, wherein the changing rate of the boundary equals to the changing rate of the second relative distance.

9. An electronic device for unlocking a touch screen, comprising:

the touch screen; and

a processor, executing the following operations;

determining a relative distance between two touch signals while at least one of the two touch signals moves on the touch screen; and

unlocking the touch screen, which is locked, while the relative distance is larger than or smaller than a default value.

10. The electronic device of claim 9, wherein before the touch screen detects the two touch signals, the processor further executes the following operation of displaying a graph with a boundary while the touch screen, which is locked, detects at least one touch signal.

11. The electronic device of claim 10, wherein the processor further executes the following operation of vanishing the graph while the processor unlocks the touch screen.

12. The electronic device of claim 10, wherein the processor controls that the boundary changes with the moving track of the two touch signals as one of the following states:

the processor controls that the diameter of the boundary decreases gradually when the relative distance decreases gradually; and

the processor controls that the diameter of the boundary increases gradually when the relative distance increases gradually.

13. The electronic device of claim 12, wherein before the two signals touch the boundary, the processor controls that the boundary changes with the moving track of the two touch signals.

14. The electronic device of claim 13, wherein the changing rate of the boundary equals to the changing rate of the relative distance.

15. The electronic device of claim 12, wherein before the two touch signals touch the boundary, the processor maintains the diameter of the boundary;

and while the two touch signals touch the boundary, the processor starts to control that the boundary changes with the moving track of the two touch signals.

16. The electronic device of claim 15, wherein the changing rate of the boundary equals to the changing rate of the relative distance.

17. A method for unlocking a touch screen of an electronic device, comprising:

determining a first relative distance between two touch signals when the two touch signals are determined by the touch screen;

determining a second relative distance between the two touch signals after at least one of the two touch signals moves; and

unlocking the touch screen, which is locked, while a difference between the first relative distance and the second relative distance is larger than a default value.

18. The method of claim 17, wherein before the touch screen detects the two touch signals, the method further comprises the following step of displaying a graph with a boundary while the touch screen, which is locked, detects at least one touch signal.

19. The method of claim 18, further comprising the following step of vanishing the graph while the touch screen is unlocked.

20. The method of claim 18, wherein the boundary changes with the moving track of the two touch signals as one of the following states:

the diameter of the boundary decreases step by step with the decrease of the second relative distance when the first relative distance is larger than the second relative distance; and

the diameter of the boundary increases step by step with the increase of the second relative distance when the first relative distance is smaller than the second relative distance.

21. The method of claim 20, wherein before the two signals touch the boundary, the boundary changes with the moving track of the two touch signals.

22. The method of claim 21, wherein the changing rate of the boundary equals to the changing rate of the second relative distance.

23. The method of claim 20, wherein before the two touch signals touch the boundary, the diameter of the boundary keeps the same;

and while the two touch signals touch the boundary, the first relative distance is determined, and then the boundary changes with the moving track of the two touch signals.

24. The method of claim 23, wherein the changing rate of the boundary equals to the changing rate of the second relative distance.

25. A method for unlocking a touch screen of an electronic device, comprising:

determining a relative distance between two touch signals while at least one of the two touch signals moves on the touch screen; and

unlocking the touch screen, which is locked, while the relative distance is larger than or smaller than a default value.

26. The method of claim 25, wherein before the touch screen detects the two touch signals, the method further comprises the following step of displaying a graph with a boundary while the touch screen, which is locked, detects at least one touch signal.

27. The method of claim 26, further comprises the following step of vanishing the graph while the touch screen is unlocked.

28. The method of claim 26, wherein the boundary changes with the moving track of the two touch signals as one of the following states:

the diameter of the boundary decreases gradually when the relative distance decreases gradually; and

the diameter of the boundary increases gradually when the relative distance increases gradually.

29. The method of claim 28, wherein before the two signals touch the boundary, the boundary changes with the moving track of the two touch signals.

30. The method of claim 29, wherein the changing rate of the boundary equals to the changing rate of the relative distance.

31. The method of claim 29, wherein before the two touch signals touch the boundary, the diameter of the boundary keeps the same;

and while the two touch signals touch the boundary, the boundary changes with the moving track of the two touch signals.

32. The method of claim 31, wherein the changing rate of the boundary equals to the changing rate of the relative distance.