LED Display Screen for Advertising technology
LED display is a kind of display using LED, also known as “LED panel”. Hscode: 85312000, it is widely used in information release, outdoor media, stadiums, indoor large-scale display solutions. In addition, it is also very common in outdoor traffic instructions or public transport signs.
Most outdoor and part of indoor displays are composed of multiple discrete packaged light-emitting diodes. Red, green and blue light-emitting diodes form a group of square modules, which form full-color picture elements under coordinated driving. The resolution is determined by the distance between the center points of picture elements. The world’s largest LED display is more than 1500 feet long and is located at the Fairmont street light show in Las Vegas, Nevada. Most indoor displays use SMT surface mount technology LED components (but there is a trend to extend to the outdoor market). Each SMD pixel module contains a number of red, green and blue diodes in a package, and then soldered on the PCB board. The diodes smaller than the needles are very close together. This kind of display has better color consistency and reduces the minimum pixel distance by about 25% than the display made of discrete packaged led.
Indoor LED Display Screen for Advertising generally have a brightness of at least 600 CD / sqm (candlelight / square meter, NITS), which is enough for companies and retail stores. However, in places with a brighter environment, higher screen brightness may be required, such as fashion and automobile exhibitions, and stage lighting may need to be further improved. Relatively speaking. Video image needs lower brightness and color temperature, but the color temperature of LED Display Screen for Advertising is 6500-9000k, which is much higher than that of video image. Generally, 5000 nits is required for outdoor use, but 8000 nits may be required for places with direct sunlight.
Different from the common consumption and commercial display devices (LCD, PDP, DLP, etc.), the “LED display” belongs to the industrial level equipment, and the vast majority of “LED display” has been completed as a unit of engineering projects. Common display devices are mostly used in indoor environment with low brightness, poor weatherability and short service life. The brightness of “LED display” can even reach more than 10000 nits, which can be completely waterproof, salt spray proof and dust-proof, and is suitable for outdoor environment. At the same time, the life of LED can reach 100000 hours, which is much longer than that of common display devices. This is also the reason why “LED Display Screen for Advertising” is widely used in the field of traffic indication and public transport display boards.
From the perspective of light-emitting principle, each pixel of “LED Display Screen for Advertising” is an independent LED device. These devices are arranged and welded on the front PCB board of the product in a specific way. Through a series of integrated circuits and control systems, the brightness, stroke graphics, signals or images of each LED are controlled. All pixels are active LED devices. The ordinary display device usually projects the backlight to a certain type of panel, and the special structure of the panel realizes different degrees and ways of light leakage to display the image. Although PDP is active lighting, it is produced and sold as a standard product with small area panel.
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