LED display is a kind of flat panel display, which consists of small LED module panels, which is used to display various information such as text, images, and video.
LED display is a new type of information display medium. It is a flat display screen composed of light emitting diode dot matrix modules or pixel units.
(1) divided by display device
LED digital display: The display device is a 7-segment digital tube, which is suitable for making digital displays such as clock screens and interest rate screens. LED dot-matrix graphic display: The display device is a dot-matrix display module composed of many uniformly arranged light-emitting diodes, which is suitable for playing text and image information.
(2) According to the use environment, the indoor screen area is generally less than ten square meters, and the point density is high. It is used in non-sunlight or lighting environments. The viewing distance is a few meters away. The diameter of the light emitting point is small, and the diameter is generally 3 to 8 mm. The outdoor screen area generally ranges from a few square meters to tens or even hundreds of square meters, the point density is relatively thin (mostly 1000 to 4000 dots / m2), the luminous brightness is 3000 to 5000cd / m2 (different directions, different brightness requirements), and can be used in sunlight Use under direct conditions, the viewing distance is tens of meters away, the screen has good wind and rain and lightning protection capabilities. The basic unit of outdoor screen lighting is pixels, which make up the center diameter of the pixel’s light emitting points, such as P10mm, P12mm, P16mm, P20mm, P24mm, P26mm, etc. The semi-outdoor screen is between outdoor and indoor. It has a high luminous brightness, and can be used outside in direct sunlight. The screen body is sealed, usually under the eaves or in the window.
(3) Divided by control or usage
Synchronization means that the LED display works basically the same as a computer monitor. It maps the image on the computer monitor in real time at a refresh rate of at least 30 fields / s. It usually has multi-gray color display capabilities. Can achieve the effect of multimedia advertising. Asynchronous (or communication) means that the LED screen has the ability to store and play automatically. The text and non-grayscale pictures edited on the PC are transmitted to the LED screen through the serial port or other network interfaces, and then the LED screen is automatically played offline. Generally there is no multi-gray display capability. It is mainly used to display text information and can be connected to multiple screens.
(1) High-intensity light, under the refraction of sunlight, can display the screen surface content in high-definition within the visible range.
(2) The gray control level is high. It can use 1024 to 4096 levels of gray control to clearly and vividly display colors above 16.7M, ensuring a super three-dimensional image.
(3) The driving power is large, and the scanning method is mainly based on static latching to ensure high intensity light.
(4) In order to ensure the best playback effect, the light can be reasonably controlled by the automatic adjustment function under different background environments.
(5) Circuit integration mainly uses large-scale imported devices to improve the reliability of operation and is conducive to maintenance and debugging.
(6) Use modern digital processing technology to process video, and mainly select the technical distribution method for scanning. The design is modular, static constant current drive, and automatic adjustment of brightness, so as to achieve high-fidelity, no ghosting, and enhance the image The sharpness of the picture.
(7) There are various types of information display, such as icons, videos, texts, animations, pictures, etc., and various forms of reality, such as networking and remote reality. The combination of common colors and craftsmanship.
LED electronic display integrates microelectronics technology, computer technology and information processing into one. It has the advantages of bright colors, wide dynamic range, high brightness, long life, stable and reliable work, etc. LED displays are widely used in commercial media, cultural performance markets, stadiums, information dissemination, news releases, securities trading, etc., and can meet the needs of different environments.
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