Infrared Touch Screen Monitor
An infrared touchscreen is characterized by a touch frame mounted in front of the display. This frame contains a printed circuit board equipped with a series of infrared LEDs and phototransistors hidden behind a bezel. The bezel protects these components from the external environment while allowing the infrared beam to pass through, creating a grid of invisible beams in front of the display. Principle of operation Infrared frame: The commercial infrared touch monitor is surrounded by a frame with integrated infrared light-emitting diodes (IR-LEDs) and phototransistors (sensors). IR Grid: The IR-LEDs emit an infrared beam that creates a grid of invisible light on the surface of the screen. Touch Detection: When a finger or any object touches the screen, the IR beam is blocked. The phototransistor detects this masking. Position Mapping: The sensor calculates the exact position of the touch based on where the IR beam is blocked. This data is then sent to the device's con...