LED lighting has been a massive market activation conditions?

Economic LED is mainly reflected in the energy-saving effect better, illumination efficiency. In addition, due to the long life of LED, the replacement cost is significantly better than other light sources.

The global lighting market appetite on the twenty billion, in the production of incandescent lamp, Ban Ban specification in 2012 after the road, although the energy-saving fluorescent lamp (CFL) penetration rate is still dominant, but in the rise of the global awareness of environmental protection, light emitting diode (LED) has become one of the countries pushing policies, the lighting plan LED the bulb will push for many countries in the priority of the imported products. The market research agency estimates, 2011 LED lighting penetration rate of 3%, shipments will reach six hundred million, the output value of $8 billion. As of 2013, with 40 watts and 60 watts of traditional light off the tide, the overall market size will increase to two billion and five hundred million.

Japan and South Korea and North America and other countries have to implement the subsidy policy of LED lighting and other green products, currently including stores, shops and factories and other places also have a higher willingness of replacement for the LED lighting, estimated that in 2011 the global LED lighting penetration is expected to exceed 10%, attract Nichia, PHILPS, OSRAM and CREE and other business opportunities for manufacturers. As more and more countries began to replace the budget LED lights, LED lighting plus the annual price drop of more than 30% pieces, estimated 2013 penetration will increase to nearly 20%, the market prospects can be expected. (source: Journal of Electronic Science and technology of the new)

Governments in the development of LED lighting plan

Twenty-first Century - Japan lighting plan

The lighting plan America - the next generation

Taiwan - white lighting plan

South Korea GaN semiconductor development plan

Europe - Rainbow plan

China National Semiconductor Lighting Project

Because the product design characteristics of the source LED, special and high efficiency driving circuit, and in optical design, LED is a one-way point light source, optical design can be very good, can make the light to reach the designated area, at the same time reduce the reflection, all these can improve the irradiation effect, so the cost should be the key pointer off illumination application evaluation LED.

From the LED production technology with availability, China government by Metal Organic Chemical Vapor Deposition incentives, to promote the ability of LED, internal self-sufficient. This scheme is expected in 2010-2012 years will cost $1 billion 600 million in the MOCVD, but also provide up to $1 million 800 thousand in grants for each item of equipment, the local government also proposed to reduce the tax rate, to speed up the equipment replacement, and free preferential measures, so the plan is to encourage existing Chinese LED manufacturers to expand production capacity, but also led to many new entrants, and from Taiwan and South Korean manufacturers have to enter joint ventures China, they have become the driving factors of Chinese capacity increasing.

Because of this, we believe that the massive market LED lighting has activated conditions.

Lighting market is the first activation of outdoor large angle of illumination, such as street lights, billboards, etc.. Indoor lighting activated first will be long-term lighting applications, including tunnels, cold storage, garage, supermarket, workshop, office buildings, shopping malls (Leng Baiguang), is expected by the end of 2011 or so most of the commercial lighting home lighting is mainly activated, high-end customers.

However, the LED lighting market is also facing many challenges, in addition to price, for example to improve the luminous efficiency, reduce glare and improve the optical configuration and uniformity are the focus, especially in the field of replace fluorescent lamp is especially important.

The existence of high efficiency LED high color temperature and other shortcomings. Due to the use of different habits, some applications (such as clothing stores) or some countries (such as most Asian countries) need to lower the temperature of warm white light, which is the largest loss of about 30% of the light source efficiency. For this reason, the threshold of activation of warm white light is higher than the cold white light, we estimate that when the cost of LED can be reduced by about 40%, warm white light will have the current cold white economy, is expected in this time around the end of 2011.

LED lamp life has been controversial, although the life of the LED chip may be greater than 100 thousand hours, but the packaging and the driver may lead to the whole lamp life expectancy. At present, the standard has been introduced LED street lamp life expectancy to reach thirty thousand hours, most of the provisions of indoor lighting standards in the twenty thousand hours, which is the industry's general level.

Most of the current LED life after a certain period of time after the test, the use of data derived from the model. Due to the long life of the LED, the customer is difficult to determine the life of the LED lamp by using the experience inch, and before the non-standard LED products affect the public's expectations for LED life.

Select LED lighting power supply and driving scheme

In the LED lighting design, driving scheme generally has two kinds: linear driving and driving type switch.

Linear drive applications are one of the most simple and direct driver applications. Although there are many problems such as low efficiency and poor adjustment in the application of white light LED, the circuit is simple and compact, and it can be used in some special occasions.

But the switch type drive can obtain the good current control precision and the high overall efficiency, the application way mainly divides into the step-down type and the boost type two big kinds. The buck switch driver is applied to the terminal voltage of the power supply voltage higher than LED or to the application of multiple LED parallel drive. The boost switch driver is applied to the terminal voltage of the power supply voltage less than LED or a series of LED driver.

It is generally believed that the isolation type driving safety