Occasionally, it was found in the bulb of TOSHIBA that the light source used was the 757 product produced by Nichia. Judging from the appearance, it should be the product of the 757D series. This product is the leader in the SMD3030 product.
Nichia also used the thermoplastic sealing material for the manufacture of the brackets in this mid-power product. It is collectively referred to as the EMC bracket in China. Find some descriptions of thermoplastic seal materials on the Nichia website.
“The birth of Nichia's new outer packaging materials has opened up new options for LED packaging. The perfect formulation of thermosetting materials and inorganic materials used in new outer sealing materials not only increases light reflectivity and structural stability (see below). It also enhances corrosion resistance even in high temperature environments. This epoch-making outer packaging material can be used to replace low-cost plastic outer packaging and high-cost ceramic outer packaging."
The material also describes the shortcomings of traditional PPA materials: “Traditional plastic outer packaging materials may be degraded under the influence of light, which is caused by the benzene ring structure in the outer packaging material. PPA resin containing benzene ring structure. The thermoplastic outer package made of poly(o-dimethylformamide) undergoes discoloration under oxidation and photoexcitation (as shown below).
In addition, the amide bond of PPA will be decomposed under the influence of the heat generated by the LED driving, resulting in discoloration (yellowing) of the outer package, low light reflectance, reduced luminous flux and color coordinate shift (as shown below).
The lamp bead is removed from the PCB through the heating platform for photoelectric test. The data is as follows:
For the color temperature of 2700K, the light effect can be achieved at the level of high-end products. The color rendering index and the R9 indicator also meet the requirements of the test certification standard. The rated current of the product is 150 mA. The actual test found that there is still 100 lm/w of light efficiency at 250 mA, which is obvious when designing.
Now there are many 3030 brackets made of EMC material in the domestic market. The original design of this design is Nichia. In the future, EMC3030 products may be around 2W or even higher. And EMC3030 is likely to replace the 1~2W ceramic high power market. The idea of ​​using two medium power chips instead of one high power chip is also formed. There is a logo in the country and a company like Nichia is very good. Only in the case of serious product homogeneity, only the first-in-class can achieve the expected profit.
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