Scanning configuration of capacitive sensor
A capacitive sensor and scanning device technology, which is applied in the direction of instruments, electrical digital data processing, and input/output process of data processing, etc., can solve the problems of poor anti-interference performance, misjudgment, and unstable data, etc., to improve the driving ability , enhance the anti-interference, restrain the effect of interference
Active Publication Date: 2013-04-17
SUZHOU PIXCIR MICROELECTRONICS
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[0003] Although the above scanning method is relatively simple, due to the difference in external interference in different time periods, the detected data is not very stable, and eventually the possible touch operation is regarded as non-touch, while non-touch is regarded as touch , it cannot be accurately judged whether it is touched or not. When the external interference is more serious, it may even detect that the coordinates drift relative to the touch point. The above will directly lead to poor anti-interference performance and misjudgment.
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[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0011] The scanning device of the 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 2 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 above-mentioned electrode groups 10 are respectively connected to corresponding pins of the touch chip 13 through wires. 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.
[0012] In the present invention, when scannin...
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The invention relates to a scanning configuration of a capacitive sensor. In the scanning configuration, monolayer electrode groups are distributed at one side, and each electrode group comprises two touch control electrodes, namely a positive touch control electrode and a negative touch control electrode, wherein the electrode groups are connected to corresponding pins of a chip through lead wires to lead out driving circuits from the chip. The scanning configuration of the capacitive sensor, disclosed by the invention, is not only simple, but also can be used for effectively restraining interferences caused by outside noises so as to enhance the anti-interference performance and the driving capability of the whole sensor.
Description
technical field [0001] The invention relates to a scanning device of a sensor, in particular to a scanning device of a capacitive sensor which can improve driving capability. Background technique [0002] The so-called capacitive sensor generally 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, PCB board, keyboard or touch screen, etc., usually by human fingers or Stylus actuation. Existing capacitive sensors are usually arranged with a single-layer electrode group on one side, and each electrode group includes two touch electrodes, namely a positive touch electrode and a negative touch electrode, and each touch electrode is connected through a wire Connect to the corresponding pin on the chip. When scanning, the above-mentioned capacitive sensor adopts a row-by-row or column-by-column scanning method, and scans two rows or two columns at the same time, wherein the ...
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IPC IPC(8): G06F3/044
Inventor 金莉陈奇李海
Owner SUZHOU PIXCIR MICROELECTRONICS