COB is unstoppable or future trends

[文|岳梦迪] How big is the role of a COB? LED people will tell you, very big.

“Sharp has now launched a new solution for the same COB to create different colors.” Tomokazu Nada, Technical Director of the LED Lighting Division at SHARP, introduced at a seminar.

“COB packaging products are committed to increasing brightness by 20%. Currently, an upgraded version of the LM and LT series has been introduced,” said Wang Gaoyang, product director of Hongli Optoelectronics (300219). LM and LT are the COB series of Hongli Optoelectronics' indoor lighting and outdoor lighting respectively.

“There is a huge demand in the retail and hospital lighting markets, which require not only the best light quality, but also cost-effective LED solutions with luminous efficacy up to 150 lm/W.” LUMILEDS LUXEON COB Product Family Director Eric Senders said. It is also referred to here as a lighter quality COB.

“COB is the most mainstream product in the market. Because the upstream and downstream supporting facilities of COB are relatively mature and cost-effective, once the versatility is solved, the possibility of large-scale production will increase.” Guoxing Optoelectronics White Light Device Business Dr. Xie Zhiguo, deputy director of the R&D department, said.

According to the incomplete statistics of the High-tech Research Institute LED Research Institute (GGII), COB currently accounts for about 10% of the total packaging industry sales, and sales have been growing all the way. "Because of the increase in chip efficiency and power, the price per watt of chips is also falling, so it is difficult to say that although the price cut of COB will lead to a decline in gross profit margin, it will not hurt the bones," said GGII researcher Li Shengfa.

In fact, the COB with strong concentrating and space saving has been developed since 2008, and the technology is changing with each passing day, which makes many companies strive for excellence in the pursuit of light quality. Today's packaging is available in a variety of formats, both flip-chip and unpackaged. COB has more advantages in the form of flip-chip introduction due to its specific structure, which may be one of the reasons why many companies have increased COB development.

Li Shengfa believes that strictly speaking, there is not much difference in COB products of various companies. Regardless of the price, product quality is the most important factor for consumers.

From the perspective of ensuring quality and cost performance, packaging manufacturers may have an advantage. They can use abundant funds to expand production, make scale effects, utilize strong technical strength, improve light quality, and use standardized management and production to improve production efficiency. The bargaining power with the upstream and downstream has been strengthened, and the company's own profits have been guaranteed.

In addition, how to improve the luminous flux per unit area, improve the light efficiency, and solve the heat dissipation problem is also the magic weapon that many COB companies pursue.

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