Light-emitting diode (LED) is a kind of electrical energy into light can solid device, its structure is dominated by PN junction chip, electrodes and optical system. LED's basic working principle is an electro-optical conversion process signs light boxes, when a forward bias voltage is applied to the PN junction ends, since the PN junction barrier is lowered, positively charged N P diffusion region region will, N region diffusion of electrons to the P region, the accumulation of non-equilibrium charge simultaneously formed in the two regions. Since the current injection of minority carriers generated relatively unstable community light boxes, the PN junction system, is injected into the valence band holes to be unbalanced and conduction band electrons complex, which will be the excess energy in the form of light to radiation, the energy of electrons and holes the greater the difference, the higher photon energy to produce. Energy differential of different sizes, frequency and wavelength of the light generated is different light boxes, the corresponding color of the light will be different. Double-sided light boxes away Lighting Technology Co., Ltd., mainly the production of high-power light-emitting side lights, light bars mainly used in shelters light boxes, rolling light boxes, community boxes, all kinds of double-sided Light Box shelters light boxes, light bar shooting distance of 3 meters, light bar light uniformity, light effects and realistic. Mobile light boxes, far illumination (certification), by far Meishan light boxes Lighting Technology Co., Ltd. Far Lighting Technology Co., Ltd. (www.ygzmkj.com) (www.ygzmkj.com) Shandong Dezhou, advertising lighting leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. Far lighting leadership with the staff warmly welcome all inquiries negotiations to create a far better future lighting.