4. LED products in the form

1968 HP company to produce the red LED (wavelength 660 nm), and AD746JR datasheet and then start to appear and AD746JR price and can be used to display the yellow
green (wavelength 570 nm), blue (wavelength 470 nm) and AD746JR suppliers and pure green (wavelength 525 nm) the LED. LED light-emitting materials used in the display has the following form:

single LED. Usually by a single LED chip, reflector, metal anode, the cathode metal composition, outsourcing is a light, condenser capacity of epoxy resin shell. Available one or more (different colors) constitute a basic single-pixel light, due to high brightness, used for outdoor display.

LED dot matrix module. Constitute a matrix of light by a number of chips, packaged in plastic case with epoxy inside.
Scan driver for scanning the ranks, easy to form high-density display, used for indoor display.

SMD LED flash (or SMD LED). Solder paste is used in the form of LED package can be used for indoor full color display can achieve a single point of maintenance, can overcome the mosaic phenomenon.