User's Manual

55
12 Clean the Infrared Tube
The interactive panel uses the horizontal and vertical infrared matrix to detect and locate
the user's touch. The screen is surrounded by an infrared tube (including the infrared
acceptor and emitter), which forms an infrared net covering on the screen surface. When a
user touches the screen, fingers or other opaque objects block the infrared rays that cross
the touch point, which helps the controller detect the coordinate position of the touch
point.
Dust is easily retained on the screen surface due to its long-term exposure in the air and
causes ineffective touch or inaccurate positioning. Therefore, you need to clean the
infrared tube around the screen regularly.