A fresh device, semiconductor, When the power supply goes in the form of a Forward bias, the electron and hole flow through will have pn junction from electrodes. When an electron hole is found, ran out of energy, the electron will evolve to a level low enough to reach orbit. Nucleus (in the form of a photon is emitted.) The color of the light that appears to depend on a mixture of inorganic elements in semiconductor and come out the nearby ultraviolet light. Visible light and infrared light. Currently, LED can be developed into a large television screens from 30 — 60 feet and has features that can be seen. While outdoors The basic principles are the same as CRT tv that changes electrical signals from the antenna or from the video player as a point of light. The screen. A large tv that uses red, green and blue LED bulb replace light points, 1 point (1 module), so on a tv screen 1 module caused at least 3 LED bulbs, tubes (red, green, and blue). However, 1 module may contain more than 3 tubes, it depends on the designer's size 1 module, to be clear, detailed images LED bulbs must be used as the number of thousands of spots of the mesh. For example, if you want a picture with 640 x 480 points in detail, must use a light amount of 307200 points it means that LED bulbs must be used at least 3 x = 307200 921600 spots.
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