TOUCH IMPLEMENTATION METHOD AND DEVICE AND ELECTRONIC DEVICE

• US 20160342279A1
• Filed: 03/31/2016
• Published: 11/24/2016
• Est. Priority Date: 05/19/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: ZHAO, Xingxing
• Granted Patent: US 10,120,501 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386

Abstract

A touch implementation method and device and an electronic device are provided, and the method includes: displaying N calibration points for user touch by a display screen of an electronic device; acquiring first coordinates of the N calibration points for user touch; acquiring second coordinates of the N calibration points; and calculating a mapping parameter between a first coordinate of a point and a second coordinate of the point according to the first coordinates of the N calibration points and the second coordinates of the N calibration points. The mapping parameter is configured for acquiring a first coordinate of a touch point touched by the user upon a user touching the display screen. Embodiments of present disclosure can reduce the cost of the electronic.

Claims

1. A touch implementation method, comprising:

displaying N calibration points for user touch by a display screen of an electronic device;

acquiring first coordinates of the N calibration points for user touch, wherein a first coordinate of a point refers to a pixel coordinate, at the display screen of the electronic device, of the point;

the pixel coordinate is defined by a pixel distance to a default pixel at the display screen;

first coordinates of at least three of the N calibration points allow the three of the N calibration points to be not in a same straight line upon the three of the N calibration points being displayed by the display screen; and

N≧

3 and N is an integer;

acquiring second coordinates of the N calibration points, wherein a second coordinate of the point refers to a three-dimensional coordinate detected by a depth device upon the point being touched by a user; and

calculating a mapping parameter between the first coordinate of the point and the second coordinate of the point according to the first coordinates of the N calibration points and the second coordinates of the N calibration points, wherein the mapping parameter is configured for acquiring a first coordinate of a touch point touched by the user upon the user touching the display screen.

2. The method according to claim 1, wherein the N calibration points are displayed by the display screen in sequence.

3. The method according to claim 2, wherein

mapping parameters K₀, K₁, K₂, K₃, K₄ and K₅ between the first coordinate of the point and the second coordinate of the point are calculated according to

4. The method according to claim 3, wherein after calculating the mapping parameter, the method further comprises:

acquiring a second coordinate of the touch point touched by the user upon the user touching the display screen; and

calculating the first coordinate of the touch point according to the second coordinate of the touch point and the mapping parameter.

5. The method according to claim 4, wherein

the first coordinate of the touch point is calculated according to

6. The method according to claim 1, wherein

mapping parameters K₀, K₁, K₂, K₃, K₄ and K₅ between the first coordinate of the point and the second coordinate of the point are calculated according to

7. The method according to claim 6, wherein

the first coordinate of the touch point is calculated according to

8. The method according to claim 1, wherein after calculating the mapping parameter, the method further comprises:

acquiring a second coordinate of the touch point touched by the user upon the user touching the display screen; and

calculating the first coordinate of the touch point according to the second coordinate of the touch point and the mapping parameter.

9. The method according to claim 1, wherein before acquiring the first coordinates of the N calibration points for user touch, the method further comprises:

detecting whether the mapping parameter needs to be calibrated,

wherein acquiring the first coordinates of the N calibration points for user touch comprises;

acquiring the first coordinates of the N calibration points for user touch in a situation where the mapping parameter needs to be calibrated.

10. A touch implementation device, comprising:

a display screen configured to display N calibration points for user touch;

a first acquisition unit configured to acquire first coordinates of the N calibration points for user touch, wherein a first coordinate of a point refers to a pixel coordinate of the point at the display screen;

the pixel coordinate is defined by a pixel distance to a default pixel at the display screen;

first coordinates of at least three of the N calibration points allow the three of the N calibration points to be not in a same straight line upon the three of the N calibration points being displayed by the display screen; and

N≧

3 and N is an integer;

a second acquisition unit configured to acquire second coordinates of the N calibration points, wherein a second coordinate of the point refers to a three-dimensional coordinate detected by a depth device upon the point being touched by a user; and

a first calculating element configured to calculate a mapping parameter between the first coordinate of the point and the second coordinate of the point according to the first coordinates of the N calibration points and the second coordinates of the N calibration points, wherein the mapping parameter is configure for acquiring a first coordinate of a touch point touched by the user upon the user touching the display screen.

11. The device according to claim 10, wherein the N calibration points are displayed by the display screen in sequence.

12. The device according to claim 11, wherein the first calculating element is configured to:

calculate mapping parameters K₀, K₁, K₂, K₃, K₄ and K₅ between the first coordinate of the point and the second coordinate of the point according to

13. The device according to claim 12, wherein

the second acquisition unit is also configured to acquire a second coordinate of the touch point touched by the user upon the user touching the display screen;

and

the device further comprises a second calculating element configured to calculate the first coordinate of the touch point according to the second coordinate of the touch point and the mapping parameter.

14. The device according to claim 13, wherein the second calculating element is configured to:

calculate the first coordinate of the touch point according to

15. The device according to claim 10, wherein the first calculating element is configured to:

calculate mapping parameters K₀, K₁, K₂, K₃, K₄ and K₅ between the first coordinate of the point and the second coordinate of the point according to

16. The device according to claim 15, wherein the second calculating element is configured to:

calculate the first coordinate of the touch point according to

17. The device according to claim 10, wherein

the second acquisition unit is also configured to acquire a second coordinate of the touch point touched by the user upon the user touching the display screen;

and

the device further comprises a second calculating element configured to calculate the first coordinate of the touch point according to the second coordinate of the touch point and the mapping parameter.

18. The device according to claim 10, further comprising:

a detection unit configured to detect whether the mapping parameter needs to be calibrated,

wherein the first acquisition unit is configured to acquire the first coordinates of the N calibration points for user touch in a situation where the mapping parameter needs to be calibrated.

19. An electronic device, comprising the device according to claim 10.

20. A touch implementation device, comprising:

a memory and a processor, wherein the memory is configured to store a code which is configured for controlling the processor to execute a following action;

displaying N calibration points for user touch by a display screen;

acquiring first coordinates of the N calibration points, wherein a first coordinate of a point refers to a pixel coordinate, at the display screen, of the point; and

first coordinates of at least three of the calibration points allow the three of the calibration points to be not in a same straight line upon the three of the calibration points being displayed by the display screen;

acquiring second coordinates of the N calibration points, wherein a second coordinate of the point refers to a three-dimensional coordinate detected by a depth device upon the point being touched by a user; and

calculating a mapping parameter between the first coordinate of the point and the second coordinate of the point according to the first coordinates of the N calibration points and the second coordinates of the N calibration points, wherein the mapping parameter is configured for acquiring a first coordinate of a touch point touched by the user upon the user touching the display screen.