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What are the types of touch screen applications for touch all-in-one machines?

Source: KONWHAI TOUCHAuthor: KONWHAI Date: 2020-10-09 Click:

  •      Traditional computers use input and output devices such as mice and keyboards for information input, while touch screens have the characteristics of simpler and more flexible operation and better experience. Users only need to touch characters, pictures, files and locations on the screen with their fingers or a light pen to achieve specific operations.
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  •      The touch all-in-one machine is composed of advanced touch screen, motherboard, memory, hard disk, graphics card and other electronic components, which is the same as the working principle of traditional PC. Users only need to touch the screen of the machine lightly with their fingers to quickly get the information they want, which makes the human-computer interaction more straightforward. The touch all-in-one machine truly integrates touch and control, and greatly improves people's work efficiency.
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  •      So, there are many ways to intelligently touch applications. What are the types of touch screen applications for touch all-in-ones?
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  • What are the types of touch screen applications for touch all-in-one machines?

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  •   Analysis of touch screen application type of touch all-in-one machine: 
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  • 1. Resistive touch screen
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  •      Resistive touch screen is a kind of sensor, which is basically a structure of thin film and glass. The adjacent sides of the thin film and glass are coated with ITO (Nano Indium Tin Metal Oxide) coating. ITO has good conductivity and transparency. Sex. When touch operation, the ITO of the lower layer of the film will contact the ITO of the upper layer of the glass, and the corresponding electric signal will be transmitted through the sensor, and then sent to the processor through the conversion circuit, which is converted into the X and Y values ​​on the screen through calculation, and the point is completed. The selected action is displayed on the screen. Users only need to touch characters, pictures, files and locations on the screen with their fingers or a light pen to achieve specific operations.
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  • 2. Capacitive touch screen
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  •      The capacitive touch screen is a touch screen that uses human body current sensing to work. When a finger touches the touch screen, the controller obtains the position of the touch point by accurately calculating the proportion of current generated by the finger touch. Capacitive screens are highly sensitive, fast in response, and can be operated with light touches, but they are low in integration and costly to produce large screens. They are not suitable for large sizes and difficult to maintain. They are suitable for mainstream mobile phones and tablet screens.
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  • 3. Infrared touch screen
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  •      The infrared touch screen uses the infrared matrix densely distributed in the X and Y directions to detect and locate the user's touch. The infrared touch screen is equipped with a circuit board outer frame in front of the display, and the circuit board is arranged with infrared emitting tubes and infrared receiving tubes on the four sides of the screen, one by one corresponding to a horizontal and vertical cross infrared matrix. When the user touches the screen, the finger will block the horizontal and vertical two infrared rays passing through the position, and the position of the touch point on the screen can be determined based on this. This kind of screen has high sensitivity, fast response speed, easy integration, moderate price and convenient maintenance. It is currently widely used in large displays.
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  • 4. Acoustic touch screen
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  •      The surface acoustic wave touch screen is a touch technology that uses sound waves to locate. On the four corners of the touch screen, sensors that emit and receive sound waves in the X and Y directions are respectively pasted, and 45° reflection stripes are engraved on the sides. When the finger touches the screen, the finger absorbs a part of the sound wave energy, and the controller detects the attenuation of the received signal at a certain moment, and thus can calculate the position of the touch point. The surface acoustic wave touch screen has the performance of sensing touch pressure. The surface acoustic wave touch screen is not affected by environmental factors such as temperature and humidity. It has high definition (high resolution), good light transmittance, high durability, good scratch resistance, sensitive response, long life, and can maintain clear and bright images Quality, no drift, only need to be calibrated once during installation, good anti-violence performance, most suitable for public information inquiry, offices, institutions and public places with relatively clean environment.
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  • 5. Optical imaging touch screen
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  •      The optical imaging touch screen is a touch technology that uses light to locate. The light source and light capture sensors are set at the four corners of the screen. When an object touches the surface of the touch screen, the light changes, and the touch IC module analyzes the light sensor The change in determines the location of the touch. The optical imaging touch screen has high durability, is suitable for use in complex environments, and supports multi-touch, but it is susceptible to misrecognition due to the influence of ambient light, dust, insects, etc. At present, this technology is only applied to desktop monitors above 10 inches, education/training, etc.
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  • 6. Electromagnetic induction touch screen
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  •      The sensor of the electromagnetic induction type touch screen is arranged behind the display screen. The sensor generates an electromagnetic area on the surface of the display. When the electronic pen touches the surface of the display, the sensor can calculate the electromagnetic change to determine the position of the touch point. The electromagnetic induction touch screen has the highest accuracy and resolution, low power consumption, thinner and lighter, and is especially suitable for use in war and building environments. At present, this technology is mainly used in the US military.
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