In the past two years, COB market demand is growing rapidly, especially in the high-end commercial lighting field, and the penetration rate is getting higher and higher. In addition, in the outdoor lighting market, the COB application ratio has gradually increased, so more and more manufacturers are involved in the COB market.
Among the international manufacturers, in addition to Citizen, Sharp, Puri, and Luminus, which have been deeply involved in the COB market in the early days, CREE, Lumileds, and Nichia have also joined.
Looking at Chinese manufacturers, the number of people involved in COB is not limited, including Hongli Zhihui, Zhonghao Optoelectronics, Liyang, Jingke Electronics, Zhongke Core Source, and the same side.
Domestic performance is comparable to international manufacturers
With the increasing number of entrants in the COB market, the market structure has undergone major changes. However, some insiders believe that from the overall point of view, it is still the international manufacturer to dominate the Chinese COB market.
"In fact, some of the domestic manufacturers have reached the international level in terms of basic performance. However, in terms of exports or some specific projects, brand influence may still be an advantage for international brands, but the advantages will be smaller and smaller!" General Manager Wang Gaoyang told Gaogong LED.
The stability of domestic COB, professionalism has gradually surpassed the international giants, and the replacement rate is also increasing year by year.
Liu Lin, the deputy general manager of the same side, believes that there is still a certain gap between patents and solutions. Domestic enterprises need to face up to the gap with international manufacturers and continue to improve their basic skills.
According to data from the GGII, the total share of COB in domestic packaging products has exceeded 7%, and it is widely used in high-power LEDs for street lamps, direct-lit backlights, spotlights and other high-brightness applications. Demand will increase from 18.5 billion in 2014 to 27 billion in 2017, with a compound annual growth rate of 13%.
Three years ago, domestic COB applications were mainly based on foreign brands and imports. However, with the gradual maturity of COB-related materials and technology in the past two years, domestic companies that focus on COB products have become comparable to foreign COB products. Level.
Wang Mengyuan, general manager of Zhonghao Optoelectronics, revealed that “the current market share of high-efficiency COB in circulation, most of the shares are cost-effective domestic COB products, but in the European and American regions due to brand and customer-specified factors, foreign brands COB The usage ratio is still high."
Song Dong, vice president of Jingke Electronics, also believes that "With the gradual maturity of COB technology, in the fierce market, some domestic manufacturers of COB packaging devices can compete with foreign companies in performance."
Continue to maintain high growth
As we all know, the demand for COB market has shown rapid growth in recent years. From the initial application to commercial lighting, it has gradually expanded to outdoor lighting and car lights. GGII expects that market demand for COB applications will continue to maintain high growth.
Wang Gaoyang said that COB has basically reached maturity, but the current quality requirements for light are higher, and there is still a long period of growth.
Nowadays, the positioning of each company's products has been basically clear. Everyone's pursuit of COB has returned to the light itself, the pursuit of light quality, the highlighting, refinement, beautification and spatial quality of the environment.
Liu Lin believes that the price is gradually decreasing first; secondly, the product parameters are also changing, mainly reflected in the higher light efficiency; in addition, the specialization, the positioning of the market segment is more and more clear, each manufacturer is in the segmentation field. The professionalism is getting higher and higher.
Nowadays, the commercial lighting market is very competitive, and the low-end circulation and high-end market are polarizing. Due to the upgrading of materials and technology, the trend of high power density is becoming more and more obvious.
According to Wang Mengyuan, “COB is the main form to meet this kind of market, because COB package itself has the advantages of smaller thermal resistance, higher optical density, uniform light output from integrated surface light source, and easier installation and use. In addition, COB is miniaturized. The application of high power density or ultra high power luminaires also has unique advantages."
I believe that after a few years of price fight, COB prices will gradually stabilize and close to the bottom. At the same time, new COB-based packaging technologies such as flip-chip COB and AC COB with high profit margins have emerged and set off in the market.
In Song Dong's view, COB has developed to date, undergoing technological innovations one after another, from ordinary current density COB to HD COB evolution; low light efficiency COB to high light efficiency, super high efficacy COB evolution; monochrome temperature COB to color temperature adjustable COB evolution; DC drive COB to AC drive COB evolution.
High density, high light efficiency is still the direction of COB development
“In the LED industry, COB light source has advantages in market segments such as Shangzhao, but SMD chip devices are still the mainstream of the market. This mainstream trend may not change in a short period of time.†Zhang Luhua, Marketing Director of Smale, said frankly .
Then, COB wants to become the mainstream trend in the future, and manufacturers must clearly define the development direction of the next COB technology.
“Next, high-light quality, high light efficiency, small size and high density are important technical development trends of COB,†Wang Wang said, this is the inevitable result of light quality and light efficiency and cost.
At present, the industry has some controversy about flip-chip COB and formal COB. Both have their own advantages. The COB technology and process are relatively mature and more efficient. The flip-chip COB has higher optical density and reliability. It is also high, which can effectively avoid the failure of other factors such as man-made.
Wang Mengyuan believes that "as the flip chip and packaging process become more mature, flip-chip COB will have more room for display, especially in the main focus lighting and narrow beam angle and miniaturized, high power density lighting applications. â€
In addition to COB, CSP is also a new technology that has attracted the attention of LED industry. It has 5-sided light-emitting characteristics and is suitable for backlighting. It is also a kind of flip-chip technology. However, for commercial lighting, COB is easier to optically design, has high light color quality and easy installation, and is still the mainstream application of commercial lighting.
For the development trend of the new generation of COB technology, Song Dong believes that the following five directions deserve everyone's attention:
First, the COB product supporting resources, such as lenses, reflectors and other supply chains continue to mature, alternative options increase, COB as a preferred source of lighting design opportunities.
Second, from the statistics, the demand for COB above 20W in 2016 has increased significantly. The COB share of Jingke's 26W, 40W and above power accounts for more than 50% of the total shipments. In 2017, this trend will continue to follow.
Third, the reliability of high-power COB light source will be further improved, and the heat dissipation performance will be improved, thereby enhancing customers' confidence in COB products.
Fourth, the color rendering index >90, or even >95 COB, there will be a larger application space, especially in the product segmentation, such as Ra>95 COB can be used in special applications such as museum lighting.
Fifth, the improvement of light efficiency has always been an endless pursuit, and European energy efficiency standards continue to challenge the light efficiency of COB. International companies such as Nichia, Cree and Bridgelux have been upgrading their COB products, and their light efficiency has been rising.
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