The industrial touch screen is applied to industrial monitor, industrial all-in-one panel PC. It can be divided into non-touch, resistive touch, and capacitive touch screen. Capacitive touch is a common touch mode. When the industrial capacitive screen fails, how to solve it? What are the principles to follow? Here let's talk about it.
The transparency and definition of the capacitive touch screen are better than that of the four-wire resistance touch screen, but it can't be compared with the surface acoustic screen and five-wire resistance screen. The reflection of the capacitance screen is serious. Moreover, the light transmittance of the four-layer composite touch screen of the capacitance technology is uneven for each wavelength light, and there is the problem of color distortion. Due to the reflection of the light among the layers, the image and characters are blurred.
In principle, the capacitive screen uses the human body as an electrode of a capacitor element. When there is enough capacitance between the conductor and the ITO working surface of the interlayer, the flowing current is enough to cause a malfunction to the capacitive screen.
Although the capacitance is inversely proportional to the distance between poles, it is directly proportional to the relative area and also related to the insulation coefficient of the medium. Therefore, when a large area of palm or hand-held conductor is close to the capacitive screen while not touching, it can cause the malfunction of the capacitive screen. In wet weather, this phenomenon is particularly obvious. Holding the monitor by hand, palm within 7cm of the monitor or body within 15cm of the monitor can cause the malfunction of the capacitive screen. Another problem of capacitive screens is that they do not react when touching with gloved hands or non-conductive objects in hand, because more insulating media are added.
The main disadvantage of the capacitive touch screen is drift: when the environment temperature and humidity change, and the environment electric field changes, the capacitive screen will drift, resulting in inaccuracy.
Some reasons will cause the drift phenomenon:
1. The temperature rise of the monitor after power-on.
2. When the user touches the screen, the other hand or one side of the body near the monitor.
3. When moving away the large objects near the capacitive touch screen.
4. Someone comes around to watch when the user touches the capacitive screen.
The reason for the drift of the capacitive screen belongs to the congenital shortage of technology, the environmental potential surface (including the user body), although it is far away from the capacitive touch screen, it is much larger than the area of fingers, which directly affects the measurement of the touch position.
The so-called "Drift phenomenon" of capacitive screen mainly refers to the following situations:
1. Making mistake action to touch operation, i.e. when touching point A location, touching response from point B location;
2. Without touching, but shows a mistake action, it refers to the body of conductive material is close to the screen, and has not touched, but it will make a touching response;
3. No response from the screen after touch operation, that is to say, the touch screen has no response after the finger touched the display.
High Expandability Industrial Embedded PC with Expansion Slots PCIex16 PCIex4 9 to 36V Input VIEW MORE
Industrial Panel PC with NFC and QR Code Scanning Functions for Smart Factory VIEW MORE
Compact Fanless Industrial Computer with Android 12, 8-Core 64-Bit RK3588 CPU VIEW MORE
VESA Mount Industrial Touch Panel PC with i3 i5 i7 Processor Desktop Computer 8GB DDR4 128GB SSD VIEW MORE
Rugged IP65 Industrial Touchscreen Computer Industrial HMI Panel PC VIEW MORE
11.6 inch Industrial All-in-one Android Panel PC for Production Line MES Terminal Attendance Machine VIEW MORE
10.1 inch Touch PC-Based MES Hardware Terminals With NFC RFID Card Reader Customized Logo VIEW MORE
11.6 inch Face Detection Verification For Access Control And Payment System VIEW MORE
8 inch Facial Recognition Terminal For Turnstile Access Control VIEW MORE
Android In-Vehicle Industrial Panel PC Vehicle AGV Computer VIEW MORE
Transportation Panel PC Windows Vehicle Mounted Touch Computers VIEW MORE
10.1" Vehicle Mount LCD Monitors Vehicle Touch Displays Car Crane Monitor VIEW MORE
Copyright © Shenzhen Touch Think Intelligence Co.,Ltd. All Rights Reserved Update cookies preferences