At present, more and more LED screens are entering indoors, especially in large hotels and large shopping malls, which are more favored by advertisers. So what are the requirements for choosing indoor LED 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, but 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, but the disadvantage is that there are seams, and 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, but the disadvantages are coarse pixel particles and low clarity. At present, the density of commercial indoor 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 paid attention to when choosing indoor LED screens
When choosing LED full-color screens, the following aspects should be considered.
① Real pixels and virtual pixels. Like outdoor LED display screens, the number of pixels of indoor LED display screens is also divided into real pixels and virtual pixels.
②Tube core. Like outdoor LED display screens, it is generally recommended that indoor LED display screens use Silan Mingxin tube cores for blue tubes and green tubes, and Guanglei or Guangjia tube cores for red tubes. High-end products are recommended to use tube cores from Japan's Nichia and the United States' CREE.
③Packaging 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 lamp and sub-surface mount are relatively cheap and are a transitional product.
④Density. 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 and other types.
⑤ Driving mode. The driving mode of indoor LED display screens is constant current driving, using dynamic scanning mode (mainly 1/4, 1/8 and other scanning modes). Under the same tube core, 1/4 scanning uses more circuits and higher brightness.