Come associated with the LED panel light, fluorescent body in conjunction with blue LED, you can easy access to white-light LED, this 1 of the of the industry's most mature white package. Currently white-light LED lighting, home lighting has started to become a case. LED controller but more white light attenuation within the course, unsuitable for lighting market, for your lighting needs of the high-end market, increase income and development on white, by altering the growth and development of packaging materials and technology to match the low attenuation of white light products, slightly modest for your LED exterior lights industry. Below is our experience in the packaging process is summed up in five points, industry colleagues and you exchange with a view improve the foundations of white light LED package concept.
Impact, chip white LED light failure
From currently experimental of results view, chip light failure of effect is divided into two large class: first is chip of fabric different led to attenuation different, currently common of Blu-ray chip lined end material for SIC and Sapphire, sic general structure design for single electrode, its thermal conductivity effect comparison good, Sapphire General design for double electrode, heat more difficult export, thermal conductivity effect poor; second is chip of size size, in chip material phase while, size size different attenuation gap also different.
Second, crystalline solid adhesive effect of white light LED strip lights 12v fades
In white light LED package commonly utilised in the industry of crystalline solid rubber insulated rubber, silicone insulated by epoxy resin and silver plastic type. All three have their advantages and disadvantages, selection to be regarded as. Epoxy resin insulated rubber thermal conductivity sexual difference, but brightness high; silicon resin insulated rubber thermal conductivity effect than epoxy resin slightly good, brightness high, but generated by silicon components accounted for must ratio, solid chip Shi next to residues of Silicon resin and fluorescence rubber by epoxy resin phase combination Shi will produced across layer phenomenon, after hot and cold impact Hou will produced split took died lamp; silver rubber of thermal conductivity sexual than Qian both are good, can extended LED chip of life, but silver rubber light of absorption comparison large, led to brightness at a decreased level. For a two-electrode when Blu-ray silver adhesive for wafer in crystalline solid, adhesive weight loss is very strict, or prone to short circuit, direct influence the yield of pill.
Three results of white light LED light fades, fluorescent powder
There are several ways of achieving white LED light, currently most in-demand on Blu-ray chip amongst the most mature through a layer of yellow phosphor, blue and yellow mixed into white light, phosphor material attenuation of white LED light can get this amazing impact. Most mainstream is YAG YAG phosphor fluorescent powder, fluorescent silicate powder, nitride phosphor, accelerated aging of Phosphors are compared with the blue LED chip white LED light, LED light controllers and the different manufacturers of Phosphor decay is not the same degree of influence, this close relationship with the phosphor raw material items. Lehman photoelectric material for selection of the most useful white light of fluorescent powder, in order for the white light LED when compared with peers in attenuation control has been greatly improved.
Four, the impact of fluorescent white light LED light glue failure
Traditional packaged white light LED, fluorescent plastic generally use epoxy or silicone, after failure of experimental results, using silicone blending of white light LED long life than epoxy resin. Causes one is to try using above two species method package into finished LED, silicone than epoxy resin anti-UV ability strong and silicone thermal effect than epoxy resin good; but in same conditions Xia, with silicone distribution powder of initial brightness to than epoxy resin distribution powder of to low, LED controller most main is because of silicone of refraction rate (1.3-1.4) than epoxy resin (1.5 above) low, so initial light effect than epoxy resin high.
Five, the support effect of white light LED light fades
LED stand mainly copper and iron stand. Thermal conductivity, good conductivity copper prices higher up. Relatively poor thermal conductivity and conductive properties of iron supports, more very likely to rust, but cheap. LED most among the iron get up on the market place place. Support of different materials have different impact within the performance of LED, especially on its failure has been particularly well-known. This is mainly due to the better thermal conductivity than copper and iron, the thermal conductivity of copper 398W (m.k) and thermal conductivity of iron 50W (m.k) about one-eighth only towards former, calls for support of plating layer thickness additionally closely connected. In selecting stand, also note that bracket the Bowl as well as light-emitting chips as well as die-size matching, which fits the quality of, directly affect the optical effects of white-light LED, otherwise easily lead to asymmetry of beam shape, yellow circle, and Rana nigromaculata, direct impact relating to the quality of merchandise.
As using white LED lighting, customer demand continually improve, have to innovate, enhance the performance of one's products to raise our process, as far as possible to meet customer needs. Help make high-performance white LED light product, LED controller materials selection and match top direct effect on white LED light attenuation and quality, therefore, good material photos best match, coupled a problem unique manufacturing process of coordination is a paramount technology of white lies. We must give full play to its own advantages, continue to accentuate research and development, develop products more appropriate to customer requirements, to contribute to National Semiconductor Lighting industry.