Positioning method of two-dimensional capacitance sensor
A technology of capacitive sensor and positioning method, which is applied in the direction of instruments, electrical digital data processing, and input/output process of data processing, etc. It can solve problems such as misjudgment, unstable data, and inability to accurately determine whether it is touched. Achieve the effect of enhancing anti-interference and restraining interference
Active Publication Date: 2013-03-13
SUZHOU PIXCIR MICROELECTRONICS
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The above-mentioned row-by-row or column-by-column scanning method, although the scanning method is relatively simple, but because there are differences in external interference in different time periods, the detected data is not very stable, and eventually the possible touch operation is blocked. It is regarded as not touched, but not touched is regarded as touched, and it cannot be accurately judged whether it is touched. When the external interference is more serious, it may even detect that the coordinates drift relative to the touched point. The above will directly lead to poor anti-interference performance and misjudgment Actions
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0013] The scanning configuration of the two-dimensional capacitive sensor involved in the present invention has a single-layer electrode group arranged on one side, that is, a single-layer electrode, please refer to figure 1 As shown in the wiring structure of the electrode layer 1, the electrode layer 1 is composed of a plurality of electrode groups 10, and each electrode group 10 has two touch electrodes, namely positive touch electrodes 11 and negative touch electrodes 12. The positive touch electrodes 11 and the negative touch electrodes 12 are arranged opposite to each other, and the electrodes in one direction are respectively arranged in the gap area between the electrodes in the other direction.
[0014] In the present invention, when scanning the electrode layer 1 row by row or column by row, two rows or two columns are scanned at the same ti...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a positioning method for scanning configuration of a two-dimensional capacitance sensor. The method comprises the following steps of: firstly, scanning each electrode group one by one, collecting data of the electrode groups, and judging a numerical value which has the maximum absolute value; secondly, scanning two electrode groups each time and detecting location point coordinates in a Y-direction; and finally, calculating location point coordinates in an X-direction according to the numerical value which has the maximum absolute value and data generated by the location point coordinates in the Y-direction. The positioning method of the two-dimensional capacitance sensor is not only simple but also can effectively overcome the interference caused by external noise, and is favorable in interference resistance, so that the specific location coordinates of a touch control point can be rapidly and accurately found.
Description
technical field [0001] The invention relates to a positioning method of a two-dimensional capacitance sensor. Background technique [0002] The so-called two-dimensional capacitive sensor refers to a device or device that uses the principle of capacitance to transmit signals in the X and Y directions. It can be an ITO (indium tin oxide) layer, a PCB board, a keyboard or a touch screen, etc., usually by human fingers. Or stylus actuation. In order to detect the specific position where the touch object touches the touch screen, in the existing scanning configuration of the two-digit capacitive sensor, it generally scans in a row-by-row or column-by-column manner, that is, scans one row or one column at each moment. In order to characterize the change in capacitance before and after touch, it is necessary to linearly convert the capacitance value of the scanning row or column into a quantity that can be distinguished by an analog circuit, such as time or frequency, and then pe...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 金莉陈奇李海
Owner SUZHOU PIXCIR MICROELECTRONICS