LED industry based on technological innovation to dispel the 2012 haze

According to market research firm IHS iSuppli released the latest report, in 2012 the global semiconductor market growth rate of only about 3.3%. The cause of the downturn is mainly affected by the global economic downturn. The main point of view of the majority of the industry to see the decline in the market in 2012.

Although there are a lot of haze, but tablet PCs, smart phones, mobile communication base stations, LED lighting, industrial control and automotive electronics field, was unanimously optimistic about the industry in 2012 the semiconductor market in the sun.

Recent Shenzhen integrated circuit exhibition, multi industry or technology seminars and Beijing lighting exhibition, domestic and foreign semiconductor manufacturers have launched a large number of innovative basic technology. In the Mobile World Congress in Barcelona (2012MWC), Intel, Qualcomm, Broadcom, TI, MarvELl, TriQuint, Freescale Carle, MediaTek, Nvidia and other chip manufacturers also showcased many of the previous years in semiconductor technology, equipment manufacturers and terminal manufacturers as "two", evolved into 2012 MWC. Equipment, terminal manufacturers and semiconductor manufacturers "three kingdoms".

The following LED lighting industry, for example, take a look at the recent semiconductor industry in the application of new technologies.

LED lighting

In the European debt crisis under control, the United States, Japan, the slow recovery of the background, China will become the main driving force for the development of the global LED market. Although the LED backlight market growth is weak, but by the Chinese government's policy support, outdoor, commercial and industrial LED lighting market engine is quite strong.

For example, Suning recently agreed to entrust the China energy conservation and Chinese Putian, lighting equipment to replace the existing more than 1 thousand retail stores in LED lighting equipment. Other companies will keep up.

Marvell global technology marketing senior manager Lance (see Figure 1) in Shenzhen, "the 2012 industry and technology seminar," also said: in 2011 China's commercial lighting grew by about 70% in 2012 will continue this trend and growth rate. He also pointed out: China's demand for LED bulbs, there is no big European and american. This is mainly because Chinese users are more sensitive to costs; in 2012 the EU's incandescent light will all be eliminated; in October 1, 2012, the United States asked incandescent lighting efficiency reached 25lm/W. At present, the global LED manufacturing 70% in China, most of them in Shenzhen, the product turnover to Europe and the United states. "

Family popularity LED lighting up to two years of buffer

A careful reading of the China Development and Reform Commission's policy on LED lighting will find that from 2012 and the year of October 1st, it will be banned from the sale and import of 100W and 60W and more than ordinary incandescent lamps.

The incandescent lamp below 100W mainly used in the family, and now the LED home lighting room every single set cost to tens of dollars or 100 yuan, a family room, the number of required sets according to the most difficult family, or unwilling to bear. Therefore, there is reason to believe that the large-scale effect of the policy will not immediately appear, LED lighting really into the family's time may not be in 2012, and is likely to be delayed until 2014. That is to say, there are more than two years of buffer period for manufacturers to market development and promotion, bedding, lamps and other related power driven new technologies and products, further pull down the superior cost and improve reliability.

LED lighting design challenge

Fairchild Semiconductor Technology Marketing Manager Qian Jiafa (see Figure 2) analyzes several key factors in the design of LED lighting:

1 for the application of 5W AC voltage input above the rated input voltage, PF (power factor) = 0.9; MR16 lighting application of low voltage input, no provisions. At present, the demand for 5W applications under the PFC is increasing; the need for an electrolytic capacitor.

2 power greater than 25W, THD (total harmonic distortion) to less than 25% (Russian market <10%). There is no strict requirement for bubble type applications.

The power efficiency of the 3.LED driver board, in the low power application, when the light plate is less than 85%, when the light plate is more than 80%. Efficiency is getting higher and higher, but the associated BOM costs are also increasing.

4 in the light compatibility, Phase (phase cut) dimmer (front and rear) is the mainstream, to ensure that the LED lamp does not flicker.

Comparison of dimming technology

The current European and American home lighting market, the universal use of SCR dimmer (Triac dimmer). LED lighting technology seminar in Shenzhen integrated circuit exhibition, Taiwan green science and technology speech said that the future of LED lighting in the process of popularization of the family, consumers want the best does not change the existing home lighting wiring, or need to re construction and decoration, very troublesome.

At present, the common dimmer includes SCR dimmer (front cut), electronic dimmer (after cut) and remote dimmer (infrared or RF).

The speaker pointed out that the electronic dimmer needs to re build the living room, remote control dimmer expensive, there is no uniform standard. Because the user does not need to change the existing circuit, the current application of SCR dimmer is more. But it will reduce the PFC, the depth of light, the conduction angle is shorter, this drawback is more obvious; but also to reduce the efficacy of the THD increase; there is a surge current; cutting angle is very small, there is a flicker of the LED lamp problem.

EZDimming dimming technology of green science and technology combining with sine or sine buck line forward line patent drive technology, dimming through the walls of the switching frequency current detection, PF is greater than 0.9, the efficacy is more than 80%, soft switching, no inrush current or line noise, and low cost.