Projection touch multimedia system principle:
        Projection touch multimedia system is the use of dimming glass projection features combined with infrared touch technology, through the computer connection and control of intelligent multimedia systems.
        Intelligent dimming glass infrared touch screen is the use of X, Y direction of the infrared matrix to detect and locate the user's touch. Infrared touch screen in front of the display to install a circuit board frame, the circuit board in the four sides of the screen arranged infrared tube and infrared receiver tube, one by one corresponding to the vertical and horizontal cross the infrared matrix. Users touch the screen, the fingers will be blocked through the location of the vertical and horizontal two infrared, which can determine the touch point in the screen position.
        The infrared touch screen is a highly integrated electronic circuit integrated product that includes a complete integrated control circuit, a set of high-precision, anti-jamming infrared emission tubes and a set of infrared receiver tubes, two mounted on a highly integrated circuit board Relative direction, forming an invisible infrared grating. The intelligent control system embedded in the control circuit continuously generates pulses on the diodes to form an infrared bias beam grating. When a touch object, such as a finger, enters the raster, the beam is blocked. The intelligent control system will detect changes in light loss and transmit signals to the control system to confirm the X and Y coordinate values
Projection Touch Multimedia System Size:
     Support regular 16: 9 and 4: 3 display size, if selected other size to be computer graphics support. It is recommended to use widescreen (16: 9) dimensions.
     Maximum support 130 inches (single), for more than 130 inches, you need more pieces of stitching.
Smart switchable glass size for the touch screen system which installed in the meeting room.