LED introduced the principle of

LED is light-emitting diode acronym, in some of the PN junction semiconductor materials, into a small number of the carrier and the majority of the carrier when the complex will be redundant in the form of light energy to release, thereby directly converted to electrical energy Light. PN junction reverse voltage increases, the minority-carrier injection is difficult, it is not luminous. This use of injection-EL produced by the principle of diode called light-emitting diodes, commonly known as LED.

-Matrix display screen by many of the components of the light-emitting diodes. First of all, will be integrated LED pixels, the pixels re-integration module, re-assembled modules screen at National Cheng Kung University. LED colorless and transparent use of the large oval-shaped silicon package, install the pipe bowl reflective surface, so that the brightness and contrast much improved, more beautiful colors!

LED light and color LED light-emitting efficiency and production of related materials and technology, there are red, green and blue are three basic colors. Only the red component of the display screen is called a single red; the red and green LED together as a pixel screen is called the production of two-color screen or color screen; the red, green and blue LED tubes on three Together as a pixel screen is called tri-color or full-color screen.

The production of indoors LED diode screen size and φ3.7 matrix φ5 two blocks, 3.7 and 5 are the diode diameter (unit: mm) In addition to often used several different color of the LED die into one package. Outdoor LED screen pixel size to more than 12-32 mm, each pixel is composed of several kinds of LED components single, common products that pixel cylinder, two-color tube 2 Pixels Red Green 3, 2 4 Red Green, Green 8, Red 4, Red 6, Green 15, and so on, three-color pixel 2 red tube with a green Blue 1, Red 2, Green 4, Blue 1, and other components.

Whether using two-color LED production or tri-color screen, want to display images, constitute the need for each pixel brightness of the LED must be able to adjust its regulation of the level of fine is the display of gray level. The higher the level of gray, showing images of the more delicate, more color-rich, shows that the control system is also more complex. General 256 gray images, color transition has been very soft, so, and multi-color full-color LED screen all requests made of the current 256 gray, such as multi-color screen can display 65,536 kinds of colors, full color screen can display 16.8 trillion colors. There is no gray monochrome screen problem.

Splicing LED screen at present mainly in the following types:

Indoor two-color LED display: dual-color display is widely used in finance, postal, telecommunications, electricity, hospitals, forces, public security, shopping malls, finance, taxation and other departments and establishments.

Outdoor two-color LED display: dual-color outdoor screens are widely used in the square, business centers, such as road outside the densely populated places. With a high-brightness, Hou-day show, and show flexibility to modify, display a strong, small-power long-life characteristics.

Indoor full color LED display: full-color, also known as the three primary colors: from red, green and blue components of the smallest of the three primary colors display unit. And the computer monitor the work of the same principle. To restore the true colors of red, green, blue, gray 256 constitute 16.7M (million) colors, rich colors to display real-time dynamic image.

Outdoor full-color LED display: full-color, also known as the three primary colors: from red, green and blue components of the smallest of the three primary colors display unit. And the computer monitor the work of the same principle. To restore the true colors of red, green, blue, gray 256 constitute 16.7M (million) colors, rich colors to display real-time dynamic image.

Over the years, LED display on its unique low-cost, low power, high-brightness, long life, and so has the advantages of the flat panel display in the field play an important role, and that for quite a long period of time, there is considerable development Space. LED display with high brightness, splicing can be used to facilitate flexible, efficient, and other advantages of low consumption, making large area show it, especially in sports, advertising, financial, exhibition and transport in the area of a wide range of applications. LED display from monochrome to full color wide span of varieties to provide for a wide range of applications to adapt to the foundation, and because of its high-brightness, high reliability, super-light anti-environment's ability to make LED displays in many households Outside, as well as special applications can not be replaced.