Noise filtering method and system of capacitive touch panel
A technology of capacitive touch and panel, applied in the field of noise filtering method and system of capacitive touch, capable of solving problems such as distribution and diffusion of sensing lines
Active Publication Date: 2013-02-27
ORISE TECH CO LTD
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[0028] The purpose of the present invention is mainly to provide a capacitive touch noise filtering method and system to solve the problem that the finger touch noise causes the distribution and diffusion of the sensing line (sensing line) direction, to filter the noise and Improving the Sensing Resolution of Capacitive Touch Panels
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[0041] The noise filtering system for a capacitive touch panel of the present invention is used for a capacitive touch panel. Figure 4 It is a block diagram of the noise filtering system 400 of the capacitive touch panel, and the noise filtering system 400 of the capacitive touch panel includes a capacitive touch panel 410, a driving device 420, and a sensing device 430 , a first switch 440 , a second switch 450 and a controller 460 .
[0042] The capacitive touch panel 410 has M first conductor lines 411 and N second conductor lines 413, M and N are respectively integers greater than 1, and the M first conductor lines 411 are arranged according to a first direction (Y) Arrangement, the N second conductor lines 413 are arranged according to a second direction (X), wherein the first direction is perpendicular to the second direction.
[0043] The driving device 420 has a plurality of drivers 421 for generating touch driving signals during touch sensing.
[0044] The sensing ...
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The invention provides a noise filtering method and system of a capacitive touch panel. The noise filtering system is applied to the capacitive touch panel and comprises M first conductor wires and N second conductor wires, wherein the M first conductor wires are arrayed according to a first direction and the N second conductors are arrayed according to a second direction. A first switcher and a second switcher are set by a controller to connect a plurality of drivers of a driving device to the M first conductor wires and connect a plurality of sensors of a sensing device to the N second conductor wires so as to carry out first direction driving and second direction sensing; and the first switcher and the second switcher are set by the controller to connect multiple drivers to the N second conductor wires and connect multiple sensors to the M first conductor wires so as to carry out second direction driving and first direction sensing, and therefore, the problem that the noise caused by touching of fingers are distributed and diffused along the direction of a sensing circuit is solved.
Description
technical field [0001] The present invention relates to the technical field of touch panels, in particular to a capacitive touch noise filtering method and system. Background technique [0002] The technical principle of the touch panel is that when a finger or other medium touches the screen, it detects voltage, current, sound waves or infrared rays according to different sensing methods, and then measures the coordinate position of the touch point. For example, the resistive touch panel uses the potential difference between the upper and lower electrodes to calculate the position of the pressure point to detect the location of the touch point. The capacitive touch panel uses the capacitance change generated by the electrostatic combination between the arranged transparent electrodes and the human body, and detects its coordinates from the generated current or voltage. [0003] According to the principle of capacitive touch technology, it can be divided into surface capaci...
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IPC IPC(8): G06F3/044
Inventor 黄鑫茂龚至宏王信濠
Owner ORISE TECH CO LTD