Industrial touch screen
Touch panel, also known as "touch screen", is an inductive liquid crystal display device that can receive input signals such as contacts. When touching the graphic buttons on the screen, the tactile feedback system on the screen can drive various connecting devices according to the pre programmed program, which can replace the mechanical button panel and create dynamic audio-visual effects through the liquid crystal display screen. As a new computer input device, touch screen is a simple, convenient and natural way of human-computer interaction.
Features of touch screen
1. Transparency: transparency, which directly affects the visual effect of the touch screen.
2. Absolute coordinates: the touch screen is an absolute coordinate system. You can directly click where you want to choose. The essential difference between the touch screen and the relative positioning system such as the mouse is the intuition in place at one time. The characteristic of absolute coordinate system is that each positioning coordinate has nothing to do with the last positioning coordinate. Physically, the touch screen is an independent coordinate positioning system, and the data touched each time is transformed into the coordinates on the screen through calibration. In this way, the output data of the same point of the touch screen is required to be stable under any circumstances
3. Reflective characteristics: reflective, mainly refers to the light and shadow behind the image overlap caused by specular reflection, such as human shadow, window, light, etc.
4. Detecting touch and positioning: various touch screen technologies rely on their own sensors. Their respective positioning principles and sensors determine the reaction speed, reliability, stability and service life of the touch screen.
Touch screen classification
1. Resistive touch screen
2. Capacitive touch screen
3. Infrared touch screen
4. Electromagnetic touch screen
5. Surface acoustic wave touch screen