What types of industrial control touch screen technologies are there?

Touch screens have gradually become extremely common in our lives, widely used in many fields, especially in industry. So, what exactly is a touchscreen?

What is a touchscreen? How important is it?

Touchscreens have gradually become extremely common in our daily lives. From mobile phones and computers to ATMs and automatic ticket gates, for special applications, touchscreen technology can meet higher requirements for safety, protection, and reliability. In harsh environments.

Currently, touchscreens are used in almost all fields, especially in industrial sectors, playing a very important role. This is an indispensable piece of equipment in most production stages and process automation and modernization processes. It can be said that part of the success and development of modern industrial production is attributed to touch screen products.

Popular touchscreen technology

The most popular touchscreen technologies today can be:

Resistive touch screen

5-wire resistive touch is the most commonly used touch technology today. Resistive touchscreens consist of glass panels and thin films. Each sheet is covered by a thin metal layer separated by narrow gaps. When users touch the screen, the two metal layers come into contact and generate current. Contacts are also detected by this voltage change.

Surface capacitive touch screen

Surface capacitive touchscreens are the second most popular touchscreens on the market today. This type of display consists of a transparent electrode layer placed on a glass plate and a protective cover. Every time fingers touch the screen, they react quickly due to the body's static electricity, and some of this static electricity is transferred from the screen to the user. Sensors located at the four corners of the display can detect capacitance reduction and allow the controller to identify contacts. Therefore, capacitive touchscreens can only be activated when they come into contact with human skin or when charging a stylus.

Projected capacitive touchscreen

Projected capacitors are similar to surface capacitors but have two other prominent advantages:

Besides exposing fingers, you can also wear surgical gloves or thin cotton gloves to activate the screen.

The capacitive touchscreen also allows multi-touch activation (two fingers input simultaneously).

Capacitive touchscreens combine glass plates embedded with transparent electrode films and IC chips to generate a three-dimensional electrostatic field. When a finger touches the screen, the current ratio changes rapidly, and the computer can detect these contacts.

Surface acoustic wave touchscreen

Touchscreen SAW (Surface Acoustic Waves) uses a series of piezoelectric transducers and receivers along the side of the screen glass to create an ultrasonic network on the surface. When in contact with the substrate, some waves are absorbed. This allows the probe to locate the contact point and send the data to a computer. Additionally, the SAW display allows activation with fingers, gloves, or a soft-tip stylus. Therefore, SAW displays will offer ease of use and excellent visibility.

Infrared Touch Screen (Infrared Touch)

Infrared touchscreens use infrared transmitters and receivers to create an invisible beam network on the screen. This ensures optimal image quality. When an object blocks an invisible infrared beam, the sensor can locate the contact point.

Customized requirements

Hengtian Weiye is a professional touchscreen customization provider, offering size customization, system customization, specification customization, frame customization, and more. For more information, please consult us.