If the display screen sizes greater than 33 feet (higher than the floor), what would you choose? Display ?Using LCD screen or fear not the PDP, CRT will of course not, not to mention the organic light-emitting. 

     Perhaps only a display technology can meet the requirement, that is, LED display. 

     Manufacturing the large screen is very difficult. At present, the largest LCD screen can be 108 inches (diagonal), and plasma (PDP) screens can be 150 inches, to a greater, the special equipment needed to develop the. 

     Projection equipment seems to be a very good programme, but the fact is not so. Indoors, projection equipment working well, but in the open-air outdoor occasions, the external environment will light projection screen very vague, especially for the front projection equipment.

    That is why Matsushita Electric Industrial Co. Ltd. will install LED display in the hall. The Japanese consumer electronics giant will provide 25 Olympic Games, code-named "ASTROVISION" a large LED display, with a total area to 4,000 square feet. Two sizes including the use of LED modules ---- 7.5 x 7.5-inch or 14 x 14 inches, 551 square feet of a screen in the 16:9 screen will be installed in 1296 LED modules. Astrovision installed and 58,000 LED modules.

     Since the benefits of The LED can easily increase the brightness. Astrovision reached a brightness of 5000 cd / m2, the brightest of the PDP to achieve the 1600 cd/m2, and Astrovision is not flat, thus tilting the light to the ground, rather than on Zhaodao audience,

      High-wide viewing angle 

      Installed in public displays must have excellent perspective, in different locations so the audience can get a clear image. This is precisely the advantages of LED. 

      Because the Astrovision screen is a LED modules, each LED as a light source but to be 150-degree viewing angle, and no LCD screen and the same point of view because changes in color distortion. One in 656 feet, watched a 33 * 33 feet large LED screen audiences, can not only watch the movement a clear picture, but can also see clearly the results show that athletes and name. 


     Astrovision in the installation of a metal lattice of the 1728 LED units, each unit in the 8 mm intervals installed the R, G, B three LED lights, as long as 10 feet too far in the distance to see, three-color lights to be all mixed Color images, vivid display of real images. Because each LED lights work reached a frequency of 1.6 kHz, can provide very fast response time.

     Of course, for less than 23 feet, the screen, LCD and PDP screen more appropriate, because the LED screen from the large volume of LED array, it is difficult to be small.