Touch panel is transparent glass coated with ATO layer and hard coating, and a shielding layer is needed between touch panel and LCD. Touch panel is a direct embodiment of touch technology, which is used to sense contact signals and analyze and identify them.
The touch screen structure includes three parts: sensor, controller and software. The sensor is a touch panel part, which mainly receives information input through contact; The function of the controller is to analyze and calculate the position of the contact, convert analog signals into digital signals, and make the information equipment accept input signals.
Extended data
The principle of optical touch panel is to arrange the light sources and receivers in the panel into a matrix by using the principle of light source receiving and blocking. When the light is blocked, we can know the position of the receiver that can't receive the signal, and then determine its accurate position.
Components of the optical touch panel include a glass substrate, an infrared emitter and an infrared receiver. The structure is that infrared emitters are arranged on the left and lower sides of the glass panel, and infrared receivers are arranged on the right and upper sides. When fingers or contacts block the red outer line, the matrix position of the contacts can be detected by the information received by the receiver.
Its advantages are that the surface is pure glass, which does not affect the light transmittance, and the product has high reliability, scratch resistance and good fire resistance, while its disadvantages are poor waterproof and antifouling performance.
Baidu Encyclopedia-Touch Panel