Hotels and supermarkets choose LED indoor screen notes
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The advantages of the rear-projection type display are small pixels and high definition. 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 definition. The disadvantage is that there is a patchwork, and the smallest patch seam can reach 1mm at present. Rear projection and plasma displays are suitable for closer viewing. The advantage of LED display is high brightness, no seams, the disadvantage is that the pixel particles are coarser and have lower resolution. The current commercial full-color indoor LED display has the highest density of P1.2, which is 629881 pixels/meter2. The LED display is suitable for viewing indoor places that are far away.
Problems to be considered when choosing LED indoor display
When choosing LED indoor display, it mainly considers from the following aspects.
1 real pixels and virtual pixels. As with outdoor full-color screens, the number of pixels in an indoor full-color screen is also divided into real pixels and virtual pixels.
2 die. As with the outdoor full-color display, it is generally recommended that the full-color blue and green tubes in the room use the cores of Shilan Mingxin, and the red tubes use Guanglei or Guangji's die. High-grade products are recommended to use the cores of Japan Nichia and the United States CREE.
3 package form. Indoor full-color LED display LED surface form has a single lamp, sub-surface paste, three together a surface mount and three-in-one surface mount, etc., the appearance is not the same. The advantage of the surface mount package is its large viewing angle, good luminescence consistency, and easy automatic soldering process. It is the mainstream product of full-color led screens, but now its price is relatively high; the single lamp angle is relatively small, the brightness is slightly higher, and the price is lower. . The Asian surface sticker is actually a kind of single lamp. Single lamps and sub-surface stickers are relatively inexpensive and are transitional products.
4 density. Because indoor full-color LED chips generate more heat and control circuit density is higher, the dot density of commercially-available full-color screens cannot be made very high, mainly including P2, P3, P4, P5, and P6.
5 drive mode. Indoor full-color LED display driver is constant current drive, using dynamic scanning (mainly 1/4, 1/8, etc. scan mode). In the case of the same die, the 1/4-scan circuit has more light and higher brightness.