Carefully decompose an LED display screen, which consists of the following elements (take a more complex synchronous video screen as an example:
① Metal structural frame
Indoor screens generally consist of an inner frame made of aluminum alloy (angle aluminum or aluminum square tubes), equipped with various circuit boards such as display boards and switching power supplies. The outer frame is made of brown aluminum alloy square tubes, or aluminum alloy clad with stainless steel, or integrated with sheet metal. Made of chemical.
The outdoor screen frame is generally composed of angle steel or I-beam according to the size and load-bearing capacity of the screen. The outer frame can be decorated with aluminum-plastic panels.
② Display unit
It is the main part of the display screen, which is composed of luminescent materials and drive circuits. The indoor screen is a unit display panel of various specifications, and the outdoor screen is a unit box.
③Scan control panel
The function of this circuit board is data buffering, generating various scanning signals and duty cycle grayscale control signals.
④ Switching power supply
Convert 220V AC power into various DC power and provide it to various circuits.
⑤ Twisted pair transmission cable
The display data and various control signals generated by the main controller are transmitted to the screen through twisted pair cables.
⑥ Main controller
Buffer the input RGB digital video signal, transform gray scale, reorganize it, and generate various control signals.
⑦ Dedicated display card and multimedia card
In addition to the basic functions of a computer display card, it also outputs digital RGB signals and line, field, blanking and other signals to the main controller. In addition to the above functions, multimedia can also convert input analog Video signals into digital RGB signals (i.e. video capture).
⑧ Computers and peripherals
⑨ Other information sources
TV sets, DVD/VCD players, camcorders and switching matrices, etc.