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QUAN CHU TONG

Guangzhou Quanchutong Industrial Co., Ltd. produces capacitive touch screens and 4-wire-5-line resistive touch screens, an integrated high-tech enterprise.

Professional touch screen, membrane switch, LED backlight

Touch screen common problems and solutions?

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Solution
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Release time:
2018/11/14
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First, the surface acoustic wave touch screen failure phenomenon analysis and processing method  
Fault one: touch deviation  
Phenomenon: The position touched by the finger does not coincide with the mouse arrow.
Analysis: After the driver is installed, there is no vertical touch to the center of the bullseye when the calibration position is made. Solution: Recalibrate the position.
Fault 2: Touch deviation   
Phenomenon: Some areas are touched accurately, and some areas are touched.
Analysis: A large amount of dust or scale accumulates on the sound wave reflection stripe on the periphery of the surface acoustic wave touch screen, which affects the transmission of the acoustic signal.
Solution: Clean the touch screen, pay special attention to clean the sound reflection stripes on the four sides of the touch screen. When cleaning, disconnect the power of the touch screen control card.
Fault three: touch no response
Phenomenon: The mouse arrow does not move when you touch the screen, and no position change occurs.
Analysis: There are many reasons for this phenomenon, one by one:
(1) The dust or scale accumulated on the sound wave reflection stripe on the periphery of the surface acoustic wave touch screen is very serious, resulting in the touch screen not working.
(2) The touch screen has failed.
(3) The touch screen control card has failed.
(4) The touch screen signal line has failed.
(5) The serial port of the host computer has failed.
(6) The operating system of the computer has failed.
(7) The touch screen driver installation error.
Second, the resistance touch screen failure phenomenon analysis and processing method
Fault one: touch deviation
Phenomenon: The position touched by the finger does not coincide with the mouse arrow.
Analysis: After the driver is installed, there is no vertical touch to the center of the bullseye when the position is corrected. Poor contact or open circuit on the signal line on the touch screen.
Remedy: Re-correct the position; find the breakpoint to reconnect or replace the touch screen.
Fault 2: Touch deviation
Phenomenon: When not touching, the mouse arrow always stays at a certain position. When touched, the mouse arrow is at the touch point and the midpoint of the original stop point.
Analysis: There is a foreign object (non-active touch) that oppresses the effective working area of ​​the resistive touch screen.
Treatment method: remove the foreign matter in the effective working area of ​​the compression resistance touch screen.
Fault three: touch no response
Phenomenon: The mouse arrow does not move when you touch the screen, and no position change occurs.
Analysis: The reasons for this phenomenon are many explained below:
(1) The touch screen has failed
(2) The touch screen control card has failed.
(3) The touch screen signal line has failed.
(4) The serial port of the host computer has failed.
(5) The operating system of the computer has failed.
(6) The touch screen driver installation error.
Third, the common fault and elimination of the resistance screen
1. Resistive screen touch mouse moves only in a small area or the resistive touch screen is not allowed
This is usually the case with the first drive, please run the touch screen calibration procedure. The touch screen calibration program must also be run after changing the display resolution (start-program)
2. The mouse always appears at a certain point on the four sides of the display because the touch area of ​​the resistive screen (the surface of the resistive screen is divided into two parts: the touch area and the non-touch area, and clicking on the non-touch area is not responsive) is the display case or the cabinet case. Pressed, it is equivalent to a point that has been touched. If the cabinet case is pressed against the touch area, you can increase the distance between the cabinet and the display screen. If the display case is pressed against the touch area, you can try to loosen the screws on the display case. If not, please Contact our technical department.
3. The mouse moves in the opposite direction to the hand, which is the four-wire connector connected to the touch screen control box and the touch screen.
4. Touch no response to check whether the connection of the touch screen is connected. One of the connections to the keyboard port of the host (take the 5 volt touch screen working voltage from the keyboard port) is not connected. Please check the connection to observe the touch screen control box light, if not If the light is on or off, the control box is broken. Please replace it. If the confirmation is not the above, please remove the touch screen driver and restart the computer to reinstall the driver, or replace the driver with a newer version.
Whether there is a device in the host conflicts with the serial port resource Check each hardware device and adjust it. For example, after the installation of some network cards, the default IRQ is 3, which conflicts with the IRQ of COM2. In this case, the IRQ of the network card should be changed to the unused IRQ. It may also be that the computer motherboard and the touch screen control box are not compatible. Please replace the host or motherboard. If the touch screen is used for a long time and some areas of the touch screen cannot be touched, it may be that the touch screen is broken, please replace the touch screen.
Fourth, infrared touch screen common faults and troubleshooting
1. Double click is not very sensitive
Turn on the infrared screen calibration program to adjust its sensitivity and turn the sensitivity down.
2. Under what circumstances will drift
Since the working principle of the infrared screen is to work by infrared rays, when the sleeves and the like touch the infrared screen, the touch function is also used (for example, when the touch screen is touched by hand, the sleeves are also moved to the screen, and the appearance will appear. The mouse pointer is not at the position of the finger point. This problem is not a drift phenomenon).
3. Under what circumstances is the calibration of the touch screen?
If you are installing an infrared touch screen for the first time or if your computer's resolution has changed, you must recalibrate the touch screen. The calibration method is as follows: Click the “Calibration” button. When the calibration interface is displayed, click the icon on the interface. When the calibration is completed, the calibration interface will disappear automatically. The data generated after calibration will take effect immediately. If you feel that the calibration is not performing well, you can calibrate it multiple times until the pointer tracking is working well. Then press the "confirm" button
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