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Method and device for identifying irregular point of touch screen
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An irregular, touch-screen technology, applied in the input/output process of data processing, instruments, electrical and digital data processing, etc., and can solve problems such as flying pens, incorrect signals, and misoperations.
Inactive Publication Date: 2011-04-06
NANTONG QIWU AGRI PROD CO LTD
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Problems solved by technology
Due to the interference signal around the touch screen, or the sampling accuracy of the touch screen control chip itself is not enough, or the defect of the main controller of the touch screen control chip, such as poor anti-interference signal or poor signalprocessing accuracy, etc. The signal is incorrect. In this way, there will be an obvious offset between the reported coordinate value and the coordinate value of the touch point on the touch screen, forming irregular points, commonly known as "flying points"
This irregular point will cause the user to fail to click the expected operation when using the touch screen, or even cause misoperation, and then cause flying pens during handwriting input, which will affect the recognition rate of handwriting input
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Embodiment 1
[0164] This embodiment takes the processing flow of the coordinate value of the X axis as an example. The method for identifying and filtering out irregular points on the touch screen in this embodiment is as follows: figure 2 shown, including the following steps:
[0166] Step 201: Save the coordinate data of the periodic sampling points into the cache queue, and judge whether |Pbef.x-Pcur.x|>Mx, and |Pbef.y-Pcur.y|
[0167] Step 202: Determine whether the coordinate data of at least four sampling points are stored in the cache queue, if yes, perform step 203, otherwise, perform step 209;
[0168] Step 203: Judging whether the difference A1 of the acceleration of the X-axis of four consecutive sampling points is less than or equal to Ax, if less than or equal to, then perform step 207, if greater, then perform step 204;
[0169] Step 204: judge wh...
Embodiment 2
[0179] This embodiment takes the processing flow of the coordinate value of the X axis as an example. The method for identifying and filtering out irregular points on the touch screen in this embodiment is as follows: image 3 shown, including the following steps:
[0180] Step 300: setting up a cache queue;
[0181] Step 301: Save the coordinate data of periodic continuous sampling points into the cache queue, judge whether the coordinate data of at least four sampling points are stored in the cache queue, if yes, execute step 302, otherwise, execute step 309;
[0183] Step 303: modify Ppre1.x to Ppre2.x, and then perform step 304;
[0184] Step 304: Judging whether |Pbef.x-Pcur.x|>Mx and |Pbef.y-Pcur.y|
[0185] Step 305: Judging whether the difference A...
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Abstract
The invention discloses a method for identifying irregular points of a touch screen, comprising the following steps of: setting a buffer queue; storing the coordinate data of sampling points with continuous periods into the buffer queue; and identifying whether the irregular points exist in more than four continuous sampling points or not according to the stored coordinate data of the more than four continuous sampling points. The invention also discloses a device for identifying the irregular points of the touch screen. The method and the device can be used for finding the irregular points positioned in tracks of the touch screen and further filtering the irregular points, thereby enhancing the user experience.
Description
technical field [0001] The invention relates to touch screen technology, in particular to a method and device for identifying irregular points on a touch screen. Background technique [0002] At present, many terminal interaction devices are equipped with touch screens, so as to provide users with an intuitive, convenient and fast input method. According to the working principle of the touch screen and the medium for transmitting information, the types of touch screens can be divided into four types, namely resistive touch screens, infrared touch screens, capacitive sensing touch screens, and surface acoustic wave touch screens. [0003] Generally, the touch screen has four electrodes: X+, X-, Y+ and Y-. After the touch screen is under pressure during operation, the touch screen control chip will regularly scan and collect the signals of the touch point relative to the four electrodes. These signals are analog The value needs to be converted into analog-to-digital (A / D, Ana...
Claims
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