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The effect of temperature on the touch screen of industrial panel PC


The effect of temperature on the touch screen of industrial panel PC

At present, the most widely used touch screens in industrial panel PCs are resistive touch screens and capacitive touch screens. Higole industrial panel PCs are all capacitive screens.

The capacitive touch screen uses a touch sensor to induce a voltage on the conductor on the screen, thereby generating a relative current, and measuring the touch point by distance. In a low temperature environment, the water vapor content on the palm skin surface is low and the conductivity is poor, which affects the performance of the sensor, resulting in the industrial tablet computer not being able to identify the touch position well and the touch failure. The operating temperature of the capacitive touch screen is usually -5℃~60℃, which makes the industrial panel computer vulnerable to influence in the northern region.

industrial panel PC

Compared with capacitive touch screens, resistive touch screens are less affected. On the one hand, because of the different processes used, the touch screen is connected to work through the miniature circuit, which is less affected by the temperature. On the other hand, the technological level of the resistive screen is relatively mature, and the materials used are inherited and used after the test. The operating temperature of the resistive touch screen is between -20°C and 65°C, so that the industrial tablet PC can meet the vast majority of use environments.

In addition, the most commonly used industrial panel PCs are infrared touch screens and display acoustic wave screens.

The accuracy of the infrared touch screen is completely free from current, voltage and static interference, and is suitable for various light pollution environmental conditions. However, the infrared touch screen is limited because of its single sensor, easy damage and aging, and the touch interface cannot withstand pollution, damage, and complicated maintenance. When the temperature is low, the static electricity generated during the use of the touch screen is easy to absorb dust, which in turn affects the use of industrial tablet computers. Suitable for use in the aerospace field.

It shows that the acoustic wave screen has high definition and good light transmittance, and the light transmittance can reach 92%. Highly durable with good damage resistance. The accuracy is completely unaffected by environmental factors such as temperature and humidity, and only needs to be calibrated once during installation. There is a third axis (ie the pressure axis) to respond. Relatively, the cost of construction and maintenance are also high. The surface acoustic wave screen needs frequent maintenance. If dust, oil or even liquid contaminates the surface of the touch screen of the industrial tablet computer, it will cause the wave guide groove on the surface of the touch screen to be blocked, so that the sound wave cannot be emitted normally or the waveform changes and the controller cannot recognize it correctly. Therefore, it is necessary to strictly pay attention to environmental hygiene, and it is necessary to wipe the surface of the touch screen of the industrial tablet computer frequently to keep it smooth and clean, and to do a comprehensive and thorough erasing regularly.