Indoor full color LED in the purchase of how to choose is very important. First of all to consider their own applications, the audience's recent viewing distance is how far. For example, the audience's viewing distance of 4 meters then select the p4 display. General pixel pitch * 1000mm is the best viewing distance. Second, we must consider the purchase of the brand, we must choose a large manufacturer of products, such quality and after-sales protection. Indoor full color display for the brightness requirements are not very high, but for the gray-scale requirements are very high. So the technical requirements for enterprise R & D is very high.
Specific purchase, please note following five aspects:
1. Pixel pitch. This is the purchase of any LED products should first consider the issue, in the purchase of indoor full color LED display, because the viewing distance is close, you can choose a smaller spacing of the display, such as P3, P4, P5 and so on.
2. Drive mode. Indoor full color LED display drive are constant current drive, the use of dynamic scanning (mainly 1/4, 1/8 and other scanning). In the case of the same die, 1/4 scan with the circuit to be more, the brightness should be higher.
3. Package form. Indoor full color LED display LED surface form of a single lamp, sub-surface paste, three fight a paste and three-in-one paste, etc., the appearance is not the same. Surface mount package has the advantage of large viewing angle, good luminous consistency, easy automatic welding processing, full-color LED screen is the mainstream products, the price is relatively high; single light angle is relatively small, slightly higher brightness, lower prices. In fact, it is a single light. Single and sub-table are relatively cheap, is a transitional product.
4. Real pixels and virtual pixels. And outdoor full color, indoor full color of the pixels are divided into real pixels and virtual pixels two.
5. die. And outdoor full color screen, the general recommendation of the indoor full-color blue tube and green tube with Shi Lan Ming core die, red tube with Guang Lei or Jia Jia's die.