The touch detection device is composed of a 0.8 mm thick Printed Circuit Board with two horizontal (Y-axis) vertical (X-axis) vertical intersecting wires embedded in the PCB. They are all insulated; one end of the wire is grounded and the other end is connected to the input of the analog electronic switch CD4051 in the touch screen controller via the FPC. The number of coils in the X and Y axis directions is determined according to the size of the display. The structure of the touch detection device is as shown in FIG. 2. The touch detection device is composed of 35 coils in the X-axis direction and 30 coils in the Y-axis, and is suitable for use in a 14-inch display screen. Where Xn, Ym, Xn+1, Ym+1 are known coordinates, ΔVx, ΔVy are known constants, ΔVx is the difference between Vn and Vn+1 when the touch pen is on the Xn axis, and ΔVy is the touch pen The difference between Vm and Vm+1 on the Ym axis. The X and Y values ​​obtained from the touch screen controller are only the coordinates of the current touch screen. It has no practical value. This value is not only related to the touch screen resolution, but also related to the touch screen and LCD. The resolution of the LCD and touch screen. And the coordinates are not the same. Therefore, if you want to get the position of the touch screen that reflects the LCD coordinates, you need to convert it in the program. The conversion formula is as follows: Among them, LCDWidth and LCDHeight are the width and height of the LCD screen, and XLCD_min, XLCD_max and YLCD_min, YLCD_max are the maximum/minimum values ​​of the horizontal and vertical coordinates of the touch screen, respectively. Bestseller Vape,Rechargeable Vape Pen,Disposable Vaporizer,Disposable Electronic Cigarette Guangzhou Yunge Tianhong Electronic Technology Co., Ltd , https://www.e-cigarettesfactory.com