System and Method for Unlocking Screen

• US 20150033326A1
• Filed: 05/28/2012
• Published: 01/29/2015
• Est. Priority Date: 02/23/2012
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Fang, Wen, Wang, Yan, Cao, Yusheng
• Granted Patent: US 9,514,311 B2
• Time in Patent Office: Days
• US Class Current: 726/16
• CPC Class Codes: G06F 21/60 Protecting data
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: H04M 1/67 by electronic means
• CPC Class Codes: H04M 2250/22 including a touch pad, a touch sensor or a touch detector digitizers for touch screens G06F3/041

Abstract

Disclosed are a method for unlocking a screen and a system for installing a screen. It is determined whether to unlock the screen by calculating an angle between a starting position and a current position of a touch point on the screen with the unlocking reference point as a vertex of the angle. With a technical solution of the disclosure, no path or destination position for screen unlocking is defined, with more casual operation, enhanced user experience, and simpler setting, thereby facilitating usage. Moreover, unlocking by mistake can also be prevented by the setting.

Claims

1. A method for unlocking a screen, comprising steps of:

obtaining a starting position of a touch point on a screen;

determining a position of an unlocking reference point;

obtaining, while the touch point moves on the screen, a current position of the touch point; and

calculating an angle between the starting position of the touch point and the current position of the touch point with the unlocking reference point as a vertex of the angle, and unlocking the screen when the angle is larger than a pre-set unlocking angle.

2. The method according to claim 1, wherein the step of determining a position of an unlocking reference point comprises:

selecting the unlocking reference point as any point with a distance to the starting position of the touch point being equal to a pre-set standard length in the screen.

3. The method according to claim 1, wherein the step of determining a position of an unlocking reference point comprises:

dividing the screen into at least one area according to a pre-set rule;

generating a benchmark point in each area resulting from dividing the screen; and

selecting a benchmark point meeting a pre-set standard as the unlocking reference point according to the starting position of the touch point.

4. The method according to claim 3, wherein the step of selecting a benchmark point meeting a pre-set standard as the unlocking reference point comprises:

determining in the screen a local area containing the starting position of the touch point; and

selecting the benchmark point of the local area as the unlocking reference point.

5. The method according to claim 3, wherein the step of selecting a benchmark point meeting a pre-set standard as the unlocking reference point comprises:

setting a standard distance between the starting position of the touch point and a benchmark point;

calculating a distance between the starting position of the touch point and a benchmark point of a local area containing the starting position of the touch point;

comparing the calculated distance with the standard distance;

selecting, when the calculated distance is larger than the standard distance, the benchmark point of the local area as the unlocking reference point;

or

selecting, when the calculated distance is smaller than the standard distance, a benchmark point in an area nearest to the starting position of the touch point other than the local area as the unlocking reference point.

6. The method according to claim 1, further comprising:

after the position of the unlocking reference point is determined,

displaying, on the screen, an unlocking starting line starting from the unlocking reference point and passing through the starting position of the touch point.

7. The method according to claim 6, further comprising:

displaying, on the screen, an unlocking target line starting from the unlocking reference point and forming an angle equal to the pre-set unlocking angle with the unlocking starting line.

8. The method according to claim 7, further comprising:

displaying, on the screen, a sector centred on the unlocking reference point with a radius of a pre-set length,

wherein the sector is defined on one side by the unlocking starting line and on the other side by a straight line defined by the unlocking reference point and the current position of the touch point.

17. The method according to claim 2, further comprising:

after the position of the unlocking reference point is determined,

displaying, on the screen, an unlocking starting line starting from the unlocking reference point and passing through the starting position of the touch point.

18. The method according to claim 3, further comprising:

after the position of the unlocking reference point is determined,

displaying, on the screen, an unlocking starting line starting from the unlocking reference point and passing through the starting position of the touch point.

19. The method according to claim 18, further comprising:

displaying, on the screen, an unlocking target line starting from the unlocking reference point and forming an angle equal to the pre-set unlocking angle with the unlocking starting line.

20. The method according to claim 19, further comprising:

displaying, on the screen, a sector centred on the unlocking reference point with a radius of a pre-set length,

wherein the sector is defined on one side by the unlocking starting line and on the other side by a straight line defined by the unlocking reference point and the current position of the touch point.

9. A system for unlocking a screen, comprising a screen detecting module, a reference point determining module, an angle calculating module, and an unlocking module, wherein

the screen detecting module is configured to detect a position of a touch point on a screen, and send the position of the touch point to the angle calculating module;

the reference point determining module is configured to determine a position of an unlocking reference point, and send the position of the unlocking reference point to the angle calculating module;

the angle calculating module is configured to calculate an angle between a starting position of the touch point and a current position of the touch point with the unlocking reference point as a vertex of the angle, and send the calculated angle to the unlocking module; and

the unlocking module is configured to compare the calculated angle with a pre-set unlocking angle, and unlock the screen when the angle is larger than the pre-set unlocking angle.

10. The system according to claim 9, wherein the reference point determining module is configured to select the unlocking reference point as any point with a distance to the starting position of the touch point being equal to a pre-set standard length in the screen.

11. The system according to claim 9, wherein the reference point determining module comprises:

an area dividing module, configured to divide the screen into at least one area according to a pre-set rule;

a benchmark point generating module, configured to generate a benchmark point in each area resulting from dividing the screen by the area dividing module; and

a reference point selecting module, configured to select a benchmark point meeting a pre-set standard as the unlocking reference point according to the starting position of the touch point.

12. The system according to claim 11, wherein the reference point selecting module comprises a distance setting module, a distance calculating module, and a distance comparing module, wherein

the distance setting module is configured to set a standard distance between the starting position of the touch point and a benchmark point, and send the standard distance to the distance comparing module;

the distance calculating module is configured to calculate a distance between the starting position of the touch point and a benchmark point of a local area containing the starting position of the touch point, and send the calculated distance to the distance comparing module; and

the distance comparing module is configured to compare the calculated distance with the standard distance; and

select, when the calculated distance is larger than the standard distance, the benchmark point of the local area as the unlocking reference point;

or select, when the calculated distance is smaller than the standard distance, a benchmark point in an area nearest to the starting position of the touch point other than the local area as the unlocking reference point.

13. The system according to claim 9, further comprising:

an angle setting module, configured to set the pre-set unlocking angle, and provide the pre-set unlocking angle to the unlocking module.

14. The system according to claim 9, further comprising:

an unlocking displaying module, configured to display, on the screen, an unlocking starting line starting from the unlocking reference point and passing through the starting position of the touch point.

15. The system according to claim 14, wherein the unlocking displaying module is further configured to display, on the screen, an unlocking target line starting from the unlocking reference point and forming an angle equal to the pre-set unlocking angle with the unlocking starting line.

16. The system according to claim 15, wherein the unlocking displaying module is further configured to display, on the screen, a sector centred on the unlocking reference point with a radius of a pre-set length,

wherein the sector is defined on one side by the unlocking starting line and on the other side by a straight line defined by the unlocking reference point and the current position of the touch point.