Common problems when choosing a touch screen for industrial panel PCs
The industrial tablet computers currently used in the market are integrated system host, display, touch screen, cancel the independent chassis, keyboard, mouse; therefore, it has the characteristics of good stability, high reliability, strong scalability, etc., due to the simplicity of industrial Tablet computers can be widely used in self-service terminals, medical equipment, industrial control, automation equipment, telecommunications, electricity, networks, rail transit and other fields. At present, the commonly used touch screens in industrial tablet computers include resistive touch screens, capacitive touch screens, infrared touch screens and surface acoustic wave touch screens. What are the common problems when choosing a touch screen for industrial panel PCs?
1. Why can't resistive touch screen achieve multi-touch like capacitive touch screen?
Resistive touch screen cannot achieve multi-touch because of its structure. The resistive touch screen is divided into two layers, separated by a spacer in the middle. When the touch screen of the industrial tablet computer is touched, the two layers collide with each other, and the current will have an impact. The chip calculates the data between the force and the current, and evaluates which position of the screen is under pressure to respond. When two or more points are pressed at the same time, the pressure on the screen of the touch screen of the industrial tablet computer becomes unbalanced, resulting in touch errors.
2. Capacitive screen or resistive screen is better?
When choosing a suitable touch screen, it needs to be determined according to the application environment of the product, the application crowd and the product market. The choice between capacitive touch screen and resistive touch screen is usually determined by cost, accuracy, damage resistance, environmental adaptability, etc. Although the resistive touch screen is inferior to the capacitive touch screen in terms of light transmittance, its low cost and wide application environment make it the first choice of many industrial panel computer manufacturers.
3. Is the life of capacitive screen long or that of resistive screen long?
Any product has a lifespan, whether it is a capacitive touch screen or a resistive touch screen, the length of the service cycle will be determined by the number of times of use, years of use, and the environment. Resistive touch screen is not afraid of dust, water vapor and oil, and can be touched with any object. However, since the outer layer of the composite film is made of plastic, too much force or touching with a sharp object may cause damage to the touch screen of the industrial tablet computer. Relatively speaking, the life cycle of capacitive touch screen is longer than that of resistive touch screen.
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