Analysis of the selection problem of touch screen of industrial tablet computer

August 25, 2022

The industrial tablet computer integrates the host, display and touch screen into one. It has the characteristics of good stability, high reliability and strong scalability. It is widely used in self-service terminals, artificial intelligence, smart cities, intelligent manufacturing, medical instruments, industrial control, and automation equipment. , telecommunications, electricity, finance, rail transit, smart medical 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. When choosing a touch screen for an industrial panel computer, customers often ask whether it is better to choose a capacitive touch screen or a resistive touch screen? Let me give you a detailed introduction to this issue.
1. Why can't resistive touch screen realize multi-touch like capacitive touch screen? Resistive touch screen can't realize 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.
Second, is capacitive screen better or resistive screen 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. Long life of capacitive screen or long life of resistive screen? 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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