The basic characteristics of a touch screen include: transparency, color distortion, reflectivity, clarity.
Touch screen (Touch Panel), also known as the "touch screen", "touch panel", is an inductive liquid crystal display device that can receive input signals such as touch, when in contact with the graphics on the screen, the screen tactile feedback system. 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.
These devices can be used to replace mechanical pushbutton panels and create vivid audio and video effects through the LCD display. Since the world's first resistive touch screen appeared in 1974, with the development of science and technology and the growth of application needs, a variety of touch technologies have been born to adapt to a variety of industries and levels of application.
Touch screen technologies that have been commercialized include: resistive touch screen, capacitive touch screen, infrared touch screen, surface acoustic wave (SAW) technology touch screen, etc., and have been widely used in cell phones, tablet PCs, retail, public **** information query, multi-media information systems, medical instruments, industrial automation, entertainment and food industry, automated ticketing systems, educational systems and many other areas. education system and many other fields.
With the development of computer technology, the computer input method from the original paper tape input to keyboard input, to the mouse input, to touch input, *** experienced four stages. This process is a process from professional to popularization, touch screen technology allows more people to use the computer.
Basic principle
Touch screen technology is the most common people after the keyboard, mouse, handwriting boards, voice input easy to accept the computer input method. With this technology, the user only needs to gently touch the computer display with a finger to realize the operation of the host computer, thus making the human-computer interaction more straightforward. This technology greatly facilitates the user and is an attractive new multimedia interactive device.
It consists of touch detection components and touch screen controller. Touch detection components installed in front of the display screen, used to detect the user's touch location, acceptance of the touch screen controller; touch screen controller's main role is to receive touch information from the touch point detection device, and convert it into contact coordinates sent to the CPU, and at the same time, can receive commands sent from the CPU and to be executed.