The detailed classification of LED displays is still relatively complicated. The following will be divided into different categories according to the base color, usage environment, application type, etc. Thanks to Qiangli Jucai Optoelectronics for providing the information.
As the name implies, the monochrome LED display screen has only one color backlight, most of which are fashionable blue or green backlights. Of course, there are also other uncommon single colors, such as red, Yellow and so on. Most single-color LED displays use red, because red has higher luminous efficiency and can obtain higher brightness. Green can also be used, or mixed colors, that is, part of it is red, part of it is green, and part of it is yellow.
Double-color LED display is an LED display made by putting red and green LEDs together as one pixel. Each pixel has two primary colors of red and green, which can be superimposed to produce yellow. With grayscale control, up to 65535 colors can be combined through changes in different grayscales of red and green.
The full-color LED display is a pixel LED display that puts red, green, and blue LED tubes together. The full-color LED display is also called three primary colors. Each pixel has three primary colors of red, green and blue. With grayscale control, the colors of nature can be well restored through the changes of different grayscales of red, green and blue. There are 16777216 colors combined.
Indoor LED display screens are mainly used indoors. In the production process, the luminescent chips are first made into dot matrix modules (or digital tubes), and then the modules are spliced ??into display unit boards of a certain size. According to the user's requirements, the display unit board is used as the basic unit and is spliced ??into the size required by the user. According to the size of pixels, indoor screens are divided into P2, P3, P3.75, P4.8, P5, P8, P10, etc.
The area of ??indoor screens generally ranges from less than 1 square meter to more than ten square meters, and the dot density is high. They are used in environments that are not exposed to direct sunlight or lighting, and the viewing distance is several meters away. The screen body does not have the ability to be sealed and waterproof. . Indoor display screens are mainly dot matrix modules, because indoor use does not require high brightness of the display screen, and the use of dot matrix modules is very cost-effective.
Outdoor LED displays are mainly used outdoors. In the production process, the light-emitting die is first packaged into a single light-emitting diode, which is called a single lamp. Single lamps used to make outdoor screens generally use A reflective cup with a light-gathering function is used to increase the brightness; multiple LED single lamps are then packaged into a single pixel tube or pixel module, and the pixel tube or pixel module is formed into a dot matrix display unit box. According to user needs and For display applications, a display unit box is used as the basic unit to form the required dimensions. The box should be sealed in design to achieve waterproof and fog-proof purposes, so that it can adapt to the outdoor environment. According to the size of pixels, outdoor screens are divided into *11, P14, *16, *19, *21, *26, P36 and other specifications.
The area of ??outdoor screens generally ranges from a few square meters to dozens or even hundreds of square meters, the dot density is relatively sparse (mostly 1000-4000 dots per square meter), and the luminous brightness is 3000-6000cd/square meter (different orientations, brightness (requirements are different), it can be used under direct sunlight, and the viewing distance is tens of meters away. The screen body has good windproof, rainproof and lightning protection capabilities.
The semi-outdoor screen is between outdoor and indoor. It has high luminous brightness and can be used outdoors without direct sunlight. The screen body has a certain seal, usually under the eaves or in the window. Inside.
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