LED (light emitting diode) is a emitting diode that release the light with many types of colors, such
as red, green, blue, white & other colors. The main using colors are red & green.

The outdoor signboard adds the blue color to express in full colors. The sizes of LED are for 3 Ø,
5 Ø, 8 Ø and 10 Ø. The main type is 5 Ø. 

The LED has semi-perpetual life cycle with approximately 100,000 hours & little power
consumption that they will greatly contribute to the future advertisement industry and are applied in
many fields such as automobile lamp, break lamp, traffic signal, light display and others.

With the size of 20 mm, 25 mm, 30 mm, 40 mm, and 50 mm, assemble several  LED in the round or
rectangular shape of emission housing.

Then mold with water-proofing to use in production of large-scale module for outdoor.
(for example : for 40 mm pixel, 30 or more of led are inserted, and 1 pixel has the same function
as actual content of 1 led-dot.

There are largely 3 types of colors, just like 1 color, 3 colors, and full colors.

The 1 color is manufactured with only one LED with red or green, while 3 colors (R, G type) use
red and green with the mixed color of yellow that appears when the two colors are simultaneously
ignited.
Full colors (R, G and B type) use 3 colors with red, green and blue that visualized 256 levels of
brightness and color control for moving picture such as video production.

There are 2 kinds of control system.
The first one is controlled by remote control.
The other is controlled by P.C. computer control.
The merit of remote control system is very convenient without any computer.
The merit of P.C. computer system is to make several kinds of animation possible.