Large hotels and large supermarkets should pay attention to the following when choosing indoor LED displays:
At present, more and more LED display screens are entering indoors, especially large hotels and large supermarkets, which are more favored by advertisers. So what are the requirements for large hotels to choose indoor full color LED displays?
In the indoor environment, large-scale full-color electronic displays with an area greater than 5m2 mainly have three choices: ordinary rear projection, DLP (digital liquid crystal rear projection) and LED display.
The advantages of rear-projection display screens are small pixels and high definition, but the disadvantages are low brightness, small viewing angle, and short lens lamp life (only a few thousand hours). The advantage of plasma splicing is that the pixels are small and the definition is high, but the disadvantage is that there are seams. At present, the smallest seam can reach 1mm. Rear projection and plasma displays are suitable for closer viewing. The advantage of LED display is high brightness and no seams. The disadvantage is that the pixel particles are coarser and the definition is low. At present, the density of the commercial indoor full-color LED display is up to P4, which is 62500 pixels/m2. The LED display is suitable for indoor places with a long viewing distance.
When choosing an indoor LED display, it is mainly considered from the following aspects.
①Real pixels and virtual pixels. Like outdoor full-color LED displays, the number of pixels of indoor full-color LED displays is divided into real pixels and virtual pixels.
② Tube core. As with the outdoor full-color LED display, it is generally recommended that the blue tube and green tube of the indoor full-color LED display adopt Silan Mingxin tube core, and the red tube adopts Opto Lei or Guangjia tube core. For high-end products, it is recommended to use Nihon Asia and American CREE dies.
③Package form. The LED surface forms of indoor full color LED displays include single lamp, sub-surface mount, three-in-one surface mount and three-in-one surface mount, and their appearance is also different. The advantages of surface mount package are large viewing angle, good luminous consistency, and easy automatic welding process. It is the mainstream product of full-color LED display, but the price is relatively high now; the single-lamp viewing angle is relatively small, the brightness is slightly higher, and the price is lower. . Sub-surface mount is actually a kind of single lamp. Both single lamp and sub-surface mount are relatively cheap and are a transitional product.
④ Density. Because indoor full-color LED chips generate a lot of heat and control circuit density is high, the dot density of commercial full-color screens cannot be made very high. There are mainly P5, P6, P7.62, P8, P10, etc. .
⑤ Drive mode. The driving method of indoor full-color LED display is constant current driving, adopting dynamic scanning method (mainly 1/4, 1/8, etc. scanning methods). In the case of the same die, more circuits are used for 1/4 scanning, and the brightness is also higher.
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