Related links: Asian enterprise LED bulb design ideas difference analysis [full version]
Reduce costs by reducing the number of chips
After removing the lampshade of the LED bulb, the LED package is presented in front of you (Fig. 4, Fig. 5). LED packages with LED chips are an important part of determining light quality and are also the "most expensive part of LED bulbs" (most LED bulb manufacturers).
Figure 4: Disassemble Group A LED bulbs (click on image to enlarge)
Note: Toshiba Lighting's 7.2W products use COB-type LEDs with high luminous efficiency. Samsung 7.1W products and 7.5W products from Qinshang Optoelectronics use ordinary SMD LEDs. Recently, the number of products with high luminous efficiency in SMD has also increased, so it is impossible to simply think that only COB has excellent luminous efficiency. The manufacturer name and component function of the component are speculated by the station.
Figure 5: Package form of group B LED (click on the image to enlarge)
Note: The 6W products of Royal Philips Electronics of the Netherlands are equipped with the LED "LUXEON Rebel" produced by Philips Lumen, and the size of the LED chip reaches 1mm square. In order to avoid thermal stress, Philips Lumens recommends that the LED be packaged into a patterned FR-4 substrate, which is actually used. Other varieties include aluminum LED package substrates.
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