The trend is also limited LED lighting touted DOB need reason

Over the years the LED industry has been in force to improve the efficiency of the LED lighting system, but ignored the potential problem is the need to improve the efficiency of the whole lamp. It is reported that only 10% of the power supply on the lighting is caused by the loss of up to even higher, but also from the power failure rate is as high as 52%.

The United States Department of energy (DOE) in its annual report continues to mention the exchange of LED technology and high voltage LED is very promising, will continue to be used in LED lighting. Thus, whether it is directly driven by AC AC LED, or work as close as possible to the high voltage linear LED, it seems that LED technology is about to usher in a new challenge.

The trend is difficult

AC LED and HV LED has been regarded as the ultimate state of LED, because it can be directly connected with the traditional lighting electricity, but has not wide coverage, the reasons specifically mentioned Seoul semiconductor Acrich technology which is the DOE in the report.

According to Yao Jiulin introduced EPISTAR, ACLED is the bridge rectifier in LED, a single integrated space can be minimized, but the cost is higher, mostly used in lamps such as G9 which is smaller. The HV LED is the use of semiconductor process LED chip into a high voltage, with the traditional bridge rectifier, can effectively reduce the cost of the system.

As for DOB, it is the LED light source and drive circuit is configured on the same substrate, because the HVLED can be connected to the light source close to the market, so that the number of parts of the LED drive circuit can be reduced, more space saving. The Seoul Acrich technology, but also the use of high pressure LED+ segment constant current IC drive mode, with the market that DOB (Driver on board) technology is the same concept.

The last two years, DOB technology gradually took the stage, and AC LED is still no improvement. Xu Lingmin said the industry, because there are currently AC LED strobe, high voltage resistance / surge and light effects and other issues need to pay attention to and solve technical problems.

And Yao Jiulin also said that although the integration of the AC LED bridge rectifier function, but the resulting LED utilization and luminous efficiency is low, the cost does not meet the demand. However, DOB technology is to drive and light source configuration on the same substrate, by HVLED technology, reduce the area of LED and the number of drive components, so that DOB architecture is more mature.

For the development of DOB, the power supply to the future of Xu Lingmin think, how to do in the system cost of the product than a lower power scheme, better performance and security, it is the need of the development of breakthrough to solve the problem of DOB. Yao Jiulin believes that, although the DOB technology industry generally accepted and began to try to use, but the need to be able to match the whole lamp design, and how many customers in coordination of universal products is the key, otherwise easy to become a customized product, promotion and application of limited market.

Synergies need to enhance market penetration

All along, the power supply is a hot topic of debate. In fact, the current market, said to power is not really no power, it should be said that DOB technology.

On the development of DOB technology, Xu Lingmin said that the current DOB technology is gradually being accepted by the market, all aspects of performance indicators tend to mature, more and more LED manufacturers began to provide DOB products. And DOB market size can account for at least the entire LED lighting market size of 30%-40%.

Yao Jiulin said, technically speaking, DOB is just a platform, is the LED light source and the driving circuit is configured on the same piece of substrate, the driving circuit can use linear or switching (Linear) architecture (Switch) architecture, which each has its advantages and disadvantages, is nothing more than the whole light efficiency / space / system cost. The market choice, and its corresponding block characteristics.

In the city scene, because DOB can effectively reduce the total cost of the system, the degree of market acceptance has increased dramatically, and by the terminal assembly plant offered to the upstream supply chain DOB scheme, DOB scheme can make the bottom-up integration rapid penetration of LED lighting market.

As for the penetration of the application field, Xu Lingmin believes that with the improvement of technology and cost, the application field, indoor, outdoor and other fields will gradually grow. Yao Jiulin believes the fastest penetration should be in application of high wattage high lumen output, the main reason is the technology platform of high wattage application collocation DOB, its driving cost decline is much higher than the low wattage applications, can fully reflect the high price advantage.

With the wafer, Seoul and other well-known leader DOB LED layout technology, domestic enterprises have set foot, which has long express, and SanDisk Ming microelectronics and a number of other well-known enterprises, IC.

As later than the big coffee of domestic enterprises, the development of the mainland's DOB technology does not seem so big gap. According to SanDisk general manager Chen Heng said, from a technical level, the domestic DOB technology architecture integrates a lot of foreign advantages, do a lot of improvement. In a sense, both cost and technology, are not lagging behind foreign.

Although the development of DOB technology has been touted, but it is not so optimistic. According to Yao Jiulin said, because the relationship is limited to the Liner architecture, the efficiency is slightly lower than that of the Switch architecture, and Liner is not easy to design a full voltage (100~240ACV) structure, and the number of Liner tolerance watt IC limit, luminous flux of the whole lamp.

Intelligent lighting, although the fire DOB leveraging need reason

With the increasingly meager profits of traditional lighting, LED technology continues to progress, the lighting market set off a "smart" wave, a new round of competition for enterprises