Method for detecting touch point on touch screen
A detection method and technology of touch points, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of easy misoperation by users and inaccurate detection of specific positions of touch points, etc., to improve accuracy degree of effect
Active Publication Date: 2014-11-26
INNOCOM TECH (SHENZHEN) CO LTD +1
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Problems solved by technology
[0005] However, the touch point detection method of the above-mentioned capacitive touch screen only uses the four corners where the four electrodes are located to detect the entire touch screen area, which makes the detection of the specific position of the touch point inaccurate, causing users to easily misuse
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[0043] The method for detecting the position of a touch point on a touch screen according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
[0044] see Figure 1 to Figure 4 , the first embodiment of the present invention provides a detection method for detecting the position of a touch point on a touch screen 10, wherein the touch screen 10 includes a substrate 102; a conductive film 104 disposed on the substrate 102, the conductive film 104 having impedance anisotropy to define a low impedance direction D and a high impedance direction H perpendicular to each other; and a plurality of mutually spaced first drive electrodes 106 arranged along a first side 111 of the conductive film 104 , the A plurality of first driving electrodes 106 are arranged along the high impedance direction H, and are respectively electrically connected to the conductive film 104 , and each of the first driving electrodes 106 is r...
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The invention provides a method for detecting a touch point on a touch screen. The touch screen comprises a conducting film with impedance anisotropy and a plurality of first driving electrodes arranged on the side along the low impedance direction of the conducting film at intervals, wherein each first driving electrode is connected with a driving circuit and a sensing circuit respectively; a touch point on the touch screen and a touch conductor form a capacitor with capacitance being C; and the resistance of the conducting film between the touch point and each first driving electrode is R1n (n=1,2,3,...). The method comprises the following steps of: adopting the driving circuit to input a pulse signal to each first driving electrode, adopting the sensing circuit to obtain a plurality of R1nC values, simulating a first curve formed by the plurality of R1nC values, and judging the coordinates of the touch point in the high impedance direction of the conducting film according to the first curve; and adopting the sensing circuit to detect the capacitance C of the coupling capacitor, comparing the R1nC values with the capacitance C to filter the capacitance C to obtain the resistance R1n, and computing the coordinates of the touch point in the low impedance direction of the conducting film.
Description
technical field [0001] The invention relates to a method for detecting touch points on a touch screen, in particular to a method for detecting touch points on a surface capacitive touch screen. Background technique [0002] In recent years, with the development of performance enhancement and diversification of various electronic devices such as mobile phones and touch navigation systems, electronic devices in which a light-transmitting touch panel is mounted on the front surface of display devices such as liquid crystals are increasing. A user of such an electronic device performs operations by pressing a finger, a pen, or the like on the touch panel while visually confirming the display content of the display device located on the back of the touch panel through the touch panel. Thereby, various functions of the electronic device can be operated. [0003] According to the working principle of the touch screen and the difference of the transmission medium, the existing touc...
Claims
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IPC IPC(8): G06F3/041
Inventor 施博盛
Owner INNOCOM TECH (SHENZHEN) CO LTD