LED screen According to the use of the environment is divided into indoor LED screen and outdoor LED screen; LED screen color is divided into the base color LED screen, double color LED screen and full-color LED screen; LED screen according to Gray level and can be divided into 16, 32, 64, 128, 256 level gray LED screen, etc. The LED screen is divided into text LED screen, Teletext led screen, synchronous video LED screen, TV video LED screen, etc.
System structure of LED display
Display unit: This is the main part of the LED display screen, which is composed of luminescent material and driving circuit. Indoor screen is a variety of specifications of the unit display Board, outdoor screen is the unit box.
Main controller: The function is to input the RGB digital video signal buffering, grayscale transformation, the organization, and produce a variety of control signals.
Switching power supply: The use of 220V alternating current into a variety of DC power supply to a variety of circuits.
Transmission Cable: The display data produced by the main control instrument and various control signals are transmitted from twisted-pair cables to the screen body.
Scanning controller: The function of the circuit board is data buffering, which produces a variety of scanning signals and a duty-ratio gray control signal.
Dedicated display card and multimedia card (video card): LED full color display card in addition to the basic functions of the computer display card, but also output digital RGB signal and line, field, blanking and other signals to the main control instrument. In addition to the above function, the multimedia card can transform the analog video signal into a digital RGB signal.
Other signal sources and their external devices: including computer, TV, Blu-ray, DVD, VCD, video camera, etc.