Led lamp is the composition of the organic light emitting diode OLED (OrganicLightEmittingDiode), the principle of light and led similar class, is to use the same material characteristics, the combination of electrons and holes after a light source.
Due to the characteristics of spontaneous light, there is no need for backlight module and color filter, and no need for normal tft-lcd pouring liquid crystal process. The weight of glass substrate can be reduced from 2 to 1, and it has the characteristics of high response speed, high brightness, wide viewing Angle and full color.
LED LED light panel, unit board, power supply, control card, connection
Unit board is one of the core components of LED display. The quality of unit board directly affects the display effect. The unit board is composed of LED module, driver chip and PCB. LED modules, in fact, are made up of many LED light points encapsulated in resin or plastic dot matrix.
The main driver chip is 74HC595 74hc245/244 74HC138 4953.
Led lights generally use a switching power supply, 220V input, 5V dc output. It should be pointed out that the LED display screen belongs to the precision electronic equipment, so switch power supply should be used instead of transformer. For a single red indoor 64x16 unit plate, the current is 2A when it is fully lit.
Bar control card, which can control 1/16 sweep of 256x16 dot two-color screen, can assemble the most cost advantage LED screen. The control card is an asynchronous card, which means that the card can save information without power, and can display information stored in it without connecting to a PC.
Data lines, transmission lines, and power lines. The data line is used to connect the control card to the LED panel, and the transmission line is used to connect the control card to the computer. The power cord is used to connect the power supply and the control card, the power supply and the LED unit board. Copper core diameter not less than 1mm (mm) for the power cord connecting the unit plate.
Process and characteristics：
Manufacturing process and characteristics of LED light products
LED upstream lei chip production accounts for about 70% of the manufacturing cost. Its principle is to grow one or more single crystal layers on the substrate to form a chip containing accumulation of various chemical elements. Its luminescence color and brightness are determined by lei crystal material. In the middle reaches, lei chip was steamed and plated to make electrodes, which were etched and then cut into grains. The downstream encapsulates grains into various LED products such as indicator lights, digital displays and infrared transmitters. And LED product features, because of its applying electric current to the compound semiconductor light-emitting principle, through the combination of electron and hole, the surplus energy is released in the form of light, luminous effect, because of its luminescent cold light, so don't need to warm light, and life can be more than 100000 hours, and has small volume, low power, fast response and high reliability etc. Advantages.