SMD LED also called SMD LED, its principle is the current through the light-emitting compound semiconductor, by combining electrons and holes, in the form of excess light energy will be released, to achieve the effect of light emission. Features SMD led light principle characteristics · ① belong Cold light, rather than by heating or discharge light, so element life than incandescent light bulbs about 50 to 100 times, about 100,000 hours. ② time without warm light, light up the response speed faster than the average lamp (about 3 ~ 400ns). ③ electro-optical conversion efficiency, low power consumption, energy saving bulbs consume more than about 1/3 - 1/20. ⑤ shock resistance, high reliability, low cost of operation of the system. ⑥ easy small, thin, lightweight, no shape restrictions, easily made all kinds of applications. 3 Application 1. Color 2. 3. 4. color illumination characteristics active components (LED) or passive components (backlight) 1. The purpose of the life of the heat 2. 3. 4. Color or color spectrum efficiency 5. 4 package · protect grain grain and lines, to avoid breakage, moisture and damage the grain. ? Increase the amount of light output of grain, reduce the proportion of total reflection of light grain surfaces. ? Design a specific angle and brightness of the light emission analysis. · Trimming LED color. · Take hold, easy to use installation. · Comply with photoelectric properties and size demands of various applications. Advantages SMD LED is attached to the circuit board surface, suitable for SMT processing, reflow SMD LED good solution brightness, viewing angle, flatness, reliability, consistency and other issues, compared to other packaged devices, It has a vibration capability, low solder joint defects, good high frequency characteristics, etc., it is on a smaller area of ??the package more LED chips, and the reflective layer PCB using lighter materials, the reflective layer needs to display the filled epoxy less by removing heavy carbon steel pins, reducing the size, weight loss products can be easily half the size and weight of only about traditional instrumentation components 1/10, after using SMD package electronic products volume reduced by 40% to 60% and weight by 60% to 80%, and ultimately make the application more perfect. Line LED package in the form of potting. Potting process is first injected into the cavity formed in the LED liquid epoxy resin, and then insert the press-welded LED holder, placed in an oven so that after curing the epoxy, the LED off from the mold cavity that is formed. Because the manufacturing process is relatively simple, low cost, has a high market share. 8 Notes 1. Clean, do not use an unknown chemical liquid cleaning SMD LED: unknown chemical liquids may damage SMD LED. When necessary, cleaning, lighting and pictures (5) of the SMD LED immersed in alcohol, less than one minute at normal room temperature and naturally dried for 15 minutes, and then began to use. 2. The anti-moisture, in order to avoid product moisture during transport and storage, the SMD LED packaging is moisture resistant aluminum packaging bag, and the bag containing the desiccant and humidity inside the card, desiccant bag's main play control package Humidity, humidity monitoring package is mainly played card pocket humidity. 3. Storage bags sealed condition after storage at a temperature <40 ℃