LED lighting market opportunity is huge, broad space for development. LED lighting applications has been developed from past outdoor landscape lighting LED interior lighting applications. According to the analysis of the next five years, LED interior lighting, there will be a trend of exponential growth. Its output value will reach tens of billions of dollars in 2011. Especially in 2009, the EU took the lead to ban incandescent plan, as well as energy-saving issues of concern, creating a huge market opportunity LED interior lighting and an optimistic outlook.
The development of high power high power led depends on two elements: First, the chip itself; lighting technology, including thermal, optical drive. The first chip, the key to the development of the LED chip technology is the base material and epitaxial growth techniques. Base material by the traditional materials of sapphire, silicon and silicon carbide, the development of zinc oxide, gallium nitride and other materials. High-power chips for accent lighting and the overall lighting, or for decorative lighting and some simple auxiliary lighting, low-power chips, the key technology upgrades are related to how to develop a more efficient, more stable chip. In a few short years, by means of a series of technical improvements, including chip architecture, surface roughening treatment and multiple quantum well structure design, including LED light effects achieved a great breakthrough. The thin-film chip technology is the core technology of super bright LED 400W chip production can reduce the loss of the light output of each side, and with the bottom of the reflecting surface of more than 97% of the light output from the front. This is not only significantly improve the LED luminous efficiency and a favorable favorable conditions for the lens design.
Fact, since the development of LED lighting has been concerned about its life, if only rely on the use of low thermal resistance LED component is unable to build a good cooling system for the lighting device, but must effectively reduce the PN node to the surrounding environment thermal resistance, can greatly reduce the LED PN junction temperature, and successful practice to extend the life of the LED lamps and to improve the actual luminous flux of the target. Different from conventional lamps, printed circuit board, both LED-powered carrier, the LED heat carrier, so the heat dissipation of the heat sink and printed circuit board design is very important. In addition, the lighting manufacturer must also consider the thermal quality of the material, thickness and size as well as thermal interface processing, and connectivity, and other factors.
The optical design of LED lighting compared with the traditional lighting, directional and point light source LED is the most typical features is key lighting optical design. Binary LED optical design, LED lamps can achieve better light distribution curve. As the application of LED lighting market is the biggest indoor lighting need to be very bright light, you can use the high transmittance shade improve light extraction efficiency. The light guide plate technology applied to the fixture, which will change the LED Blue 150W light source for the surface light source, not only can improve the lighting of the light distribution uniformity, but also to prevent glare. Can also meet some of the condenser lens or reflector to highlight illuminated objects concentrator effects to achieve real ideal optical effects.
The technical challenges of high power LED lighting, LED interior accent lighting and decorative lighting applications have had a satisfactory performance, but in general lighting and mood lighting applications still face many challenges, including the initial cost, low color temperature luminous efficiency, color rendering index, and system reliability. The cost is relatively sensitive to indoor lighting, especially in home lighting applications. Despite more and more LED light models, the luminous efficiency is improving, but the high price of this problem still exists. But lower prices when the LED light source, the overall system design optimization, the total cost is bound to decline.
LED lighting to improve light efficiency in a low temperature, low color temperature of 4,000 K is usually the first choice for indoor home lighting. Warm white light to the whole environment more warmth and relaxation; cool white gives a clean, efficient, bright feel, is more suitable for office and outdoor lighting. Extend the service life of LED 200W , improve system reliability. In general lighting applications, the overall efficiency of the LED life and reliability through system optimization can be improved. LED light source: compact, efficient, and a variety of colors and output power to choose. Power conversion: AC, batteries and other power efficient as safe low-voltage, constant current power supply. Control and drive: the use of electronic circuits to achieve constant current LED driver and control. Thermal Management: To achieve a longer life, to control the LED junction temperature is very important, and thermal analysis is also essential. Optical components: lenses, reflectors or light-material is to focus light on the necessary optical components of the target area.
With the rapid development of LED technology as well as the gradual improvement of the LED luminous efficiency of LED applications will become more extensive. Especially with the global energy shortage worsening, people are increasingly concerned about the prospects for the development of the LED lighting market, LED will be the potential for light to replace incandescent lamps, tungsten and fluorescent. In addition, the interior lighting design, the LED will tend to energy-efficient, humane and art.