High voltage pulse LED: analysis of the current development situation and future market

High voltage LED, is a kind of high power LED, LED manufacturers to provide a low power LED series using high-power integrated LED chip, it is a kind of integration in LED. The main components of high power white LED technology, the basic requirements of the LED luminous efficiency threshold pressure reached 100 lm/W.

In fact, as early as in the past there are a variety of integrated LED, with a different number of LED Series in parallel to get a variety of different power and voltage LED. The first launch of the integrated LED is the United States Puri company, a lot of small power LED on the substrate in parallel series to get a high power LED. The main difference between high voltage LED and the integrated LED is that the high voltage LED is all connected in series, while the integrated LED is series parallel.

The current market, a high voltage LED will dominate the LED lighting market in the voice of a wave after wave, then compared with the low LED, what are the advantages and disadvantages of high voltage LED, they also have what is the difference? Whether it is replaced by low voltage LED LED today, "leading to LED general lighting the future?

Enterprises pushing power steadily rising high"

Taiwan EPISTAR, has always been a pioneer of high voltage LED. Crystal power is the world's first launch of high voltage LED, but also the best efficiency of the manufacturers. From the beginning of the second quarter of last year, the crystal has begun mass production of high voltage LED, and sent to the major lighting plant. At present, the company has decided to enter the world's three largest lighting supply chain, and even the channel IKEA also began to use, but also put forward the 2011 high pressure LED lighting exceeded the target of 30%.

According to the crystal electric relevant responsible person said, the new high pressure crystal electric warm white LED luminous efficiency of 120 LM / watt level high voltage single chip, blue and red are up to 130 lumens / watt level, the company is expected in the second quarter of this year to the third quarter between listed production.

In addition, in June of this year, Wuhan Di source photoelectric is also the first to launch HV LED chip. By Di source HV chip photoelectric developed production efficiency of light is more than 110lm/W, compared with the DC power source chip Di currently in mass production, improve the luminous efficiency of about 10%, 1000 hours of continuous light output power attenuation is less than 2%. It has been proved by the test that the HV chip and the DC high power chip have the same stable and reliable photoelectric performance, reaching the advanced level of similar products. The HV high voltage LED chip, will become an important direction for the future development of Di source photoelectric LED lighting.

With the increasing demand for high voltage LED, throughout the domestic and foreign enterprises to step up investment, and strive to can share. 2011, high power LED lighting market competition will become more intense.

Currently, Cree is still lighting LED technology leader, and has launched 160 lm/W products in late 2010, but the price is relatively high. At the end of 2010 after OSRAM launched 136 lm/W products, Nichias, EPISTAR, canyuan are also in the first quarter of 2011 launch of luminous efficiency is respectively 133 lm/W and 110 lm/W and 100 lm/W products, intended to compete with Cree. It is understood that the day before the LED LED chip high voltage electricity successfully into the international Lei Jingjing LED lighting manufacturers PHILPS supply chain, and a large number of shipments from April.

Recent research and development of high voltage LED

In the middle reaches of the high pressure LED packaging, companies continue to overweight. LED lighting has given the promising trend of development, accelerate the introduction of the terminal application market at present, Edison high power LED product line has been cut into the European distributors and the mainland lighting module factory supply chain, and has been in Dongguan, and the Yangzhou area expansion of high power LED package of new capacity, in order to effectively meet the East and Southern China customers demand. Among them, the Yangzhou plant is a new production base, the total monthly production capacity will be increased to 50 million.

80 0.1W small power LED series

Highlights high voltage high voltage comparative advantage

LED company's continued enthusiasm for high voltage LED, also accompanied by the increase in high pressure LED customers, in contrast, the low voltage LED chips are facing increasingly difficult to sell into the LED general lighting market risk.

Compared to the low voltage LED, the current popular argument is that the high voltage LED has two obvious competitive advantages: first, under the same output power, the driving voltage required for high voltage LED is significantly lower than the low voltage LED. Second, high voltage LED can significantly reduce the loss of AC-DC conversion efficiency.

But in view of these two advantages, released the day before the answer expert Mao Yuhai. He suggested that the advantage of a statement is not established, because the size of the power dissipated mainly by the luminous efficiency of the LED decision, rather than its nominal power decision. Nominal power is not equal to input power. If you want to determine the size of the radiator, the same luminous efficiency should be calculated. As for the advantages of two, in fact, do AC/DC constant current drive people know that the efficiency of the AC/DC converter is almost nothing to do with the final output voltage. It is possible that the transformer secondary current will increase the number of copper losses, but it is very small, but also will not affect the design of the radiator. "

[1] [2] next page