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Method and device for debouncing of touch spot coordinates of touch screen

A touch screen, de-jitter technology, applied in the input/output process of data processing, instruments, electrical digital data processing and other directions, can solve problems such as large jitter problems, large predetermined threshold values, and inability to eliminate contact coordinate jitter problems, etc. To achieve the effect of eliminating jitter problems

Active Publication Date: 2012-08-22
BEIJING WATCH DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the above-mentioned canceling of touch screen contact coordinate jittering, the inventor found that there are at least the following problems in the prior art: In order to avoid discarding too many contact coordinates, the value of the predetermined threshold in the above solution is generally relatively large, which is suitable for jittering When the problem is relatively large; when the jitter of the contact coordinates is relatively small, the distance between two consecutive contact coordinates will not exceed the predetermined threshold, and it is considered that there is no jitter, so the relatively small contact coordinate jitter problem cannot be eliminated

Method used

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  • Method and device for debouncing of touch spot coordinates of touch screen
  • Method and device for debouncing of touch spot coordinates of touch screen
  • Method and device for debouncing of touch spot coordinates of touch screen

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Embodiment 1

[0028] An embodiment of the present invention provides a method for de-jittering touch screen contact coordinates, such as figure 1 As shown, the method includes:

[0029] 101. Obtain the current touch point coordinates of the touch screen.

[0030] Wherein, the acquisition of the current contact coordinates of the touch screen can be implemented according to any method in the prior art, which is not limited in the embodiment of the present invention; for example, when the touch screen is a resistive touch screen, the resistive touch screen will The contact pressure generated by the pen point is converted into a resistance change, and the touch screen controller converts this resistance change into the contact coordinates of the X-axis and Y-axis.

[0031] 102. When the distance between the current touch point coordinates and the previous touch point coordinates is less than or equal to a first threshold, judge the current touch point coordinates according to the current touc...

Embodiment 2

[0039] An embodiment of the present invention provides a method for de-jittering touch screen coordinates. When implementing the method, the distance between the current touch coordinates and its previous touch coordinates, and the distance between the current touch coordinates and its previous The weighted average distance of N contact coordinates determines whether the current contact coordinates jitter; as figure 2 As shown, the method includes:

[0040] 201. Acquire the current touch point coordinates of the touch screen. Wherein, the acquisition of the current touch point coordinates of the touch screen can refer to the description in step 101 in Embodiment 1, which will not be repeated here.

[0041] 202. Calculate the distance between the current touch point coordinates and the previous touch point coordinates.

[0042] For example, the coordinates of the current contact point are (x0, y0), and the coordinates of the previous contact point are (x1, y1), then the dist...

Embodiment 3

[0064] The embodiment of the present invention provides a method for de-jittering touch screen contact coordinates. In the embodiment of the present invention, the average distance between the current contact coordinates and the previous N contact coordinates is used to determine whether the current contact coordinates occur Using dithering as an example to illustrate the method, as image 3 As shown, the method includes:

[0065] 301. Acquire current touch point coordinates on the touch screen.

[0066] Wherein, the acquisition of the current touch point coordinates of the touch screen can refer to the description in step 101 in Embodiment 1, which will not be repeated here.

[0067] 302 . Calculate the distance between the current touch point coordinates and the previous touch point coordinates. For details, refer to the description in step 202 in Embodiment 2, which will not be repeated here.

[0068] 303. Determine whether the distance between the current touch point coo...

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Abstract

The embodiment of the invention discloses a method and a device for debouncing of touch spot coordinates of a touch screen, relating to the technical field of touch screens and being capable of eliminating smaller bounce of the touch spot coordinates. The method comprises the steps of: obtaining current touch spot coordinates of the touch screen; when determining that the distance between the current touch spot coordinates and the former touch spot coordinates is less than a first threshold, determining whether the current touch spot coordinates have bounce or not according to the current touch spot coordinates and the former touch spot coordinates; and if occurring the bounce, discarding the current touch spot coordinates. The embodiment of the invention is mainly applied to a process ofdebouncing of the touch spot coordinates of the touch screen.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a method and device for dejittering touch screen contact coordinates. Background technique [0002] The touch screen consists of a touch detection device and a touch screen controller; the touch detection device is installed in front of the display screen to detect the user's touch position and send the touch position information to the touch screen controller; the touch screen controller receives the touch position sent by the touch detection device information and convert it into contact coordinates. For example, a resistive touch screen converts the contact pressure generated by the pen point into a resistance change, and the touch screen controller converts this resistance change into the contact coordinates of the X-axis and Y-axis. Since the resistive touch screen needs to perform analog / digital conversion in the process of converting the resistance change into the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/045
Inventor 于涛
Owner BEIJING WATCH DATA SYST