Analyze the choice of industrial tablet touch screen?

The touch screen is a touch display panel, which is usually equipped with a touch display device with LCD, such as industrial tablets, industrial multi-unity machines, industrial Android Android android all-Bone Anne-One Machine and other displays.
Industrial tablets are an industrial control computer with touch display equipment. It has been widely used in intelligent manufacturing, urban transportation, security, commercial finance, medical and other industries, and played a very important role in social and economic development.
Do you know how to choose the touch screen of an industrial tablet? The common touch screens of industrial tablets include resistance screens, capacitor screens, infrared screens, surface sound waves, etc. The following touch screen smart editors will introduce them one by one.
1. Resistance screen: The screen of the resistance screen is a multi -layer composite film, with glass or organic glass as the base, the surface is coated with a transparent conductive layer (ITO film), and covers a layer of hardening, hardening, hardening conductive layer on the surface Smooth, scratch -resistant plastic layer. It also has a layer of ITO on its surface, and there are many transparent isolation points between the two conductive layers. When contacting the screen, the two layers and resistors of ITO contact will change. The controller calculates the coordinates of the contact point based on the detected resistance change, and then performs the corresponding operation according to the coordinate. Therefore, the industrial tablet computer using the resistor screen must perform force on the screen during the operation to achieve the touch effect.
The resistance screen has low requirements for the working environment. It is not afraid of dust, water and oil, and any object can be touched, and the requirements for temperature and humidity are small. It is suitable for industrial control fields. In addition, the resistance screen is a soft screen. The operation screen of the industrial tablet computer using the resistance screen will have a soft feeling. If it is too difficult or uses sharp touch, the touch screen may be scratched.
Five -wire resistor touch screen: good sensitivity and light transmission, long -term service life, and not afraid of dust, oil and photoelectric interference. It is suitable for various public places, especially precise industrial control places.
2. Capacity screen: The capacitor screen is a four -layer composite glass screen. The inner surface and layer of the glass screen are coated with a layer of ITO. The outermost layer is a thin silica glass protective layer. The inter -layer ITO coating is used as a working surface, the four electrodes are brought out at the four corners, and the inner layer ITO is used as a shielder to ensure a good working environment. When hand -touching the screen of the industrial tablet, the human body acts as the pole of the coupling capacitor and collects the current from the four corners of the screen to form another pole of the coupling capacitor. Get the touch coordinates by calculating the relative distance between the current and the touch position.

industrial tablet touch screen

Industrial tablets with capacitor screens can be touched more. The main disadvantage is that when the environmental temperature, humidity, and electric field changes, the capacitor screen may drift and cause inaccurate, which requires regular calibration and positioning. Therefore, the capacitor screen is not easy to be used in industrial control places and interference positions.

3. Infrared screen: The infrared screen uses the dense infrared matrix in the X and Y directions to detect and position the user's touch. The infrared screen is equipped with the circuit board frame in front of the display. The infrared transmission tube and the infrared receiver tube are arranged on the four sides of the screen, forming a horizontal and vertical cross -infrared matrix. When touching the screen of the industrial tablet computer, the touch device will prevent two infrared rays from passing through the position to determine the position of the touch point on the screen. Any contact object can change the infrared rays on the contacts to achieve touch screen operations.
4. Surface sound wave screen: Surface sound wave screen consists of touch screen, sound wave generator, reflex, and sound wave receiver. The sound wave generator can send high -frequency sound waves on the surface of the screen. When contacting the screen, the sound waves on the contacts are blocked to determine the coordinate position, respond quickly and high precision. The saw screen also has a third axis, that is, the finale. Users can touch the screen by calculating the attenuation of the receiving signal, and have the performance of sensing touch pressure.
The surface sound wave screen has high resolution and good light transmission. It is sensitive, has a long life, is not affected by temperature, humidity and other environmental factors. No drift, just calibrate once during the installation process. Industrial tablets using surface sound wave screens are suitable for various public places for unknown users. At the same time, due to dust, oil and even drink liquid, the surface sound wave screen needs to be maintained regularly. The pollution on the screen will prevent the guidance wave slot on the surface of the touch screen, making the waves unable to transmit or change the waveforms normally, so that the controller cannot be recognized normally, which affects the normal use of the industrial tablet. Users need to clean regularly.