Talking About The Basic Principle Of Touch Screen
Apr 12, 2021
Touch screen technology is a computer input method that is more acceptable to ordinary people after keyboard, mouse, handwriting pad, and voice input. Using this type of technology, if the customer slowly touches the icon or text on the computer display with his finger, he can complete the operation of the host, which makes the human-computer interaction more direct. This type of technology greatly facilitates customers and is an attractive new multimedia interactive device.
The essence of a touch screen is a sensor, which is composed of a touch inspection component and a touch screen plc device. The touch inspection component is installed in the front of the display screen to inspect the customer's touch position, and then send it to the touch screen plc. The key function of the touch screen plc is that the touch point inspection device accepts the touch information content and converts it into contact The point coordinates are given to the CPU, and the instructions sent by the CPU can be accepted and implemented in various ways.
According to the type of sensor, touch screens are roughly divided into four types: infrared type, resistor type, surface acoustic wave frequency type and capacitive sensor touch screen. Infrared technology touch screen is of high quality and low price, but its frame is easy to break, which is very easy to cause light effects and drop frames under slope conditions; capacitive technology touch screen design concept is effective, but its image drop frame problem is difficult to completely deal with; resistor technology touch screen Accurate positioning, but its price is quite high, and it is afraid of scratching vulnerable parts; the surface acoustic frequency touch screen solves the various shortcomings of the past touch screen, is clearly not easy to be destroyed, and is suitable for various places. The defect is that the surface of the display screen The presence of water droplets and dust will make the touch screen slower and slower, or even not working.
