LED electronic display by the tens of thousands - hundreds of thousands of semiconductor light-emitting diode array composed of pixels uniform. The use of different materials can produce different color LED pixels. At present, the most widely used red, green, yellow. The pure blue and green LED development has reached a practical stage.
LED display can show changes in the figures, text, graphics image; not only can be used in the indoor environment can also be used in an outdoor environment, with a projector, TV wall, LCD can not match the benefits.

The reason why LED widespread attention and rapid development, with its inherent advantages inseparable. These advantages are summarized as:

High-brightness, low voltage, small power consumption, small size, long life, impact resistance and stable performance. LED prospects for the development of a very broad and is currently moving higher brightness, higher weather-resistant, light-emitting higher density, higher luminous uniformity, reliability, full color and direction.

LED display classification

1, according to the color of color can be divided into:

Single-color screen: a single color (red or green).

Two-screen color: red green and two-color, 256 gray, you can show that 65,536 kinds of colors.

Full-color screen: red, green, blue color, gray scale of 256 full-color screen can display more than 16,000,000 kinds of colors.

2, according to the display:

LED digital display: Display Devices 7 for possession of a digital code, suitable for the production of the clock screen, screen, and other interest rates, the figures show that the electronic display.

LED dot-matrix graphic display: The display is composed of many pieces of uniform composition of the light-emitting diode array of dot-matrix display modules, suitable for broadcast in text, picture message.

3, by using the occasion:

Indoor displays: light-emitting small point, the general Φ3mm - Φ8mm, shows the general area of a few to more than 10 square meters.

Outdoor screen: the general area of a few dozen to several hundred square meters, high-brightness can be in the sun, with wind, rain, water-proof function.

4, according to the luminous points diameter:

Indoor screen: Φ3mm, Φ3.75mm, Φ5mm,

The external color display room: Φ10mm, Φ12mm, Φ16mm, Φ19mm, Φ21mm, Φ26mm

The external color of the light-emitting room for the basic unit of light-emitting tube, light-emitting tube was the principles of a group of red, green and blue light-emitting diode sealed in a plastic tube to enhance co-brightness light-emitting.


Reference link: http://www.17led.com/LEDdisplay/2008-03/25.html