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The indoor full color screen is selected in the indoor environment. Large full-color electronic displays with an area of ​​more than 5m2 mainly include ordinary rear projection, DLP (digital liquid crystal rear projection) and LED display.
The advantages of rear-projection type displays 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 P4, which is 62500 pixels/meter2. The LED display is suitable for viewing indoor places that are far away.
When selecting LED indoor display screens, the following issues should be considered when selecting LED indoor display screens.
1 density. Because indoor full-color LED chips generate more heat and control circuit density is higher, the dot density of commercial full-color screens cannot be made very high. There are mainly P5, P6, P7.62, P8, and P10. .
2 driving methods. 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.
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; single lamp angles are relatively small, brightness is slightly higher, and prices are 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 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.
5 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 Japanese Nichia and American Cree. Text / Shenzhen LED base
Problems to be considered when choosing LED indoor display
With the LED display entering the indoor market, there are high requirements for the company's technology. What are the issues that should be considered when selecting an LED indoor display?