Xincai(Personal)

P16 full color / P16 outdoor full color display / P16 full color display / outdoor advertising display / advertisement color in the 1970s the first GaP, GaAsP homojunction red, yellow, green low luminous efficiency of LED has been applied to light , numbers and text. From start to enter a variety of LED applications, including aerospace, aircraft, automotive, industrial, communications, consumer products, etc., throughout the national economic sectors and households. By 1996, sales of LED in the world has reached several billion dollars. Despite many years LED color and luminous efficiency has been limited, but because of GaP and GaAsP LED with long life, high reliability, operating current is small, with TTL, CMOS digital circuits, and many other advantages of compatibility which has been great favor by users . The last decade, high-brightness, full-color LED materials and devices has been a technology research topics at the forefront. Ultra-high brightness (UHB) is the luminous intensity at or above 100mcd the LED, also known as the candela (cd) level LED. High brightness InGaN LED A1GaInP and the development progressed very rapidly and has now reached conventional materials GaA1As, GaAsP, GaP impossible to achieve levels of performance. In 1991 Japan's Toshiba Corporation and the United States developed into InGaA1P 620nm HP's ultra-bright orange LED, 1992 年 InGaA1p590nm yellow super bright LED practical. In the same year, Toshiba developed InGaA1P 573nm yellow-green high brightness LED, normal light intensity of 2cd. In 1994 Nichia Corporation of Japan for the development of InGaN 450nm Blue (green) color high brightness LED. Thus, the three primary colors needed to color display of red, green, blue and orange and yellow colors of the LED have reached the candela luminous intensity level to achieve high brightness, full color, the LED outdoor full color show a reality. The development of LED in China started in the 1970s, industry emerged in the eighties. There are about 100 enterprises, 95 percent of manufacturers are engaged in after-package production, the required die almost all imported from abroad. Through several "five-year plan" of technological innovation, technical research, the introduction of foreign advanced equipment and some key technology that enables the production of LED technology step forward.