At present, more and more LED screens are entering indoors, especially large hotels and large supermarkets are more favored by advertisers. So what are the requirements for large hotels to choose indoor full-color screens?
In indoor environments, large full-color electronic screens with an area greater than 5m2 mainly have three options: ordinary rear projection, DLP (digital liquid crystal rear projection) and LED screens.
The advantages of rear projection screens are small pixels and high clarity, and the disadvantages are low brightness, small viewing angle, and short lens lamp life (only a few thousand hours). The advantages of plasma splicing are also small pixels and high clarity, and the disadvantages are seams. The current minimum seam can reach 1mm. Rear projection and plasma screens are suitable for close viewing. The advantages of LED screens are high brightness and no seams, and the disadvantages are coarse pixel particles and low clarity. At present, the density of commercial indoor full-color LED screens is as high as P4, that is, 62500 pixels/m2. LED screens are suitable for indoor places with a long viewing distance.
Issues that should be considered when selecting LED indoor screens
When selecting LED indoor screens, the following aspects should be considered.
① Real pixels and virtual pixels. Like outdoor full-color screens, the number of pixels of indoor full-color screens is also divided into real pixels and virtual pixels.
② Tube core. Like outdoor full-color screens, it is generally recommended that indoor full-color screen blue tubes and green tubes use Silan Mingxin tube cores, and red tubes use Guanglei or Guangjia tube cores. High-end products are recommended to use tube cores from Japan's Nichia and the United States CREE.
③ Packaging form. The LED surface forms of indoor full-color LED display screens include single lamp, sub-surface mount, three-in-one surface mount and three-in-one surface mount, and the appearance is also different. The advantages of surface mount packaging are large viewing angle, good luminous consistency, and easy automatic welding processing. It is the mainstream product of full-color LED screens, but the price is relatively high now; the viewing angle of a single lamp is relatively small, the brightness is slightly higher, and the price is lower. Sub-surface mount is actually a type of single lamp. Both single lamps and sub-surface mounts are relatively cheap and are a transitional product.
④ Density. Since indoor full-color LED chips generate a lot of heat and the control circuit density is high, the dot density of commercial full-color screens cannot be very high. There are mainly P5, P6, P7.62, P8, P10, etc.
⑤ Driving mode. The driving mode of indoor full-color LED display screens is constant current driving, using dynamic scanning mode (mainly 1/4, 1/8 scanning modes). Under the same tube core, 1/4 scanning uses more circuits and higher brightness.