Capacitive touch screen troubleshooting

Capacitive touch screen troubleshooting

1. If the user is using a capacitive touch screen, it is recommended that when the user uses it for the first time, first install the drivers required by the capacitive touch screen correctly according to the requirements of the relevant instructions, and then click the "Start"/"Program"/"Microtouch Touchware" to run the screen calibration program, after the calibration is completed, the system will automatically store the calibrated data in the controller's register, and after restarting the system, there is no need to calibrate the screen again.

2. If you re-change the display resolution or display mode of the touch screen when operating the capacitive touch screen in the middle, or adjust the refresh frequency of the touch screen controller by yourself, if you feel that the cursor and the touch point cannot correspond, you must reset the touch screen. The system performs a calibration operation.

3. In order to ensure the normal operation of the touch screen system, in addition to ensuring the correct installation of the system software, it is also necessary to remember not to install two or more touch screen drivers on one host, which will easily cause the system to run. conflict, so that the touch screen system cannot be used normally.

4. When using a resistive touch screen, if the cursor does not move or can only move in a local area, the user can check whether the touch area of ​​the touch screen is always pressed by other touch objects. If it is pressed, it is equivalent to a certain point being touched all the time, so the coordinate position fed back to the controller will be inaccurate.

5. As mentioned earlier, once the system changes the display resolution, adjusts the screen size and the first installation, there will be click inaccuracy or drift, you need to start the positioning program that comes with the application to reposition, but in When positioning, it is best to use a relatively thin pen or fingertip for positioning, which is more accurate.

6. The working environment of the surface acoustic wave touch screen is relatively high. It must work in a clean and dust-free environment, and the dust on the surface of the touch screen must be cleaned regularly. Otherwise, the dust in the air will cover the surrounding area of ​​the touch screen. When reflected on streaks or transducers, the correct positioning of the system can be affected.

7. Do not let water droplets or other soft things stick to the surface of the touch screen, otherwise the touch screen is easy to mistakenly think that the surface acoustic wave screen is inaccurate due to hand touch. In addition, when removing the dirt on the touch screen surface, the user can carefully wipe the touch screen surface with a soft dry cloth or detergent from the center of the screen outward, or use a dry soft cloth dipped in denatured alcohol or glass cleaning solution to clean the touch screen surface.

8. If you touch the surface acoustic wave touch screen with your hand or other touch objects, the touch screen responds very slowly, which indicates that the touch screen system is outdated, the internal clock frequency is too low, or there are water droplets moving on the touch screen surface. In order to restore the quick response of the touch screen, the system must be replaced or upgraded, or the water droplets on the surface of the touch screen must be wiped off with a rag.

9. The touch screen generally uses the serial port for signal transmission, and takes the signal from the PS/2 port, while the TPS screen directly takes the power from the host power supply. If the indicator light is not on, it means that no signal is received, and the PS/2 cable on the control box may be broken. If the light is on, but still does not flash, the control box is broken, so users must replace the control box. If the replacement of the control box still does not work, it is possible that the screen is pressed too tightly, and the screws around it need to be loosened a little, because the touch screen is made of special materials, and it should not be easily damaged. If the serial port is bad or disabled, the driver cannot be installed because the serial port will be automatically searched for when the driver is installed. Even if it can be installed, the mouse does not move or cannot be positioned. It is best not to use the serial port mouse to judge the quality of the serial port. Maybe the 9 serial ports are used in different ways for them. If the screen is pressed, or the ground wire is not properly connected, it will lead to inability to locate. If some areas cannot be clicked or the response is slow, it may be affected by dust, and the case needs to be disassembled to remove the dust.

10. When a finger touches a certain position of the capacitive touch screen, if the touch screen does not respond, it is very likely that the touch position is not accurate, and of course the cursor cannot be positioned correctly. If the touch area is pressed by the cabinet casing, the user can increase the distance between the cabinet and the monitor screen. If the monitor casing presses the touch area, the user can try to loosen the screws of the monitor casing.