On the technical requirements of LED lighting to the interior lighting development

 LED lighting market opportunity is huge, broad space for development. LED lighting applications have outdoor landscape lighting from the past to the development of indoor LED lighting applications. According to analysis of the development over the next five years, LED interior lighting will have exponential growth trend. 2011 its output will reach tens of billions of dollars. In particular, the first implementation of the 2009 EU plan to ban incandescent and energy-saving issues of concern, LED interior lighting created a huge market opportunity and optimistic outlook.

Development of high-power LED lighting depends on two elements: First, the chip itself; Second lighting technology, including thermal, optical drive. The first is the chip, at present, the key LED chip technology development is the base material and the epitaxial growth techniques. Sapphire substrate material by a conventional material, silicon and silicon carbide, the development of zinc oxide, gallium nitride, and other new materials. Whether it is for the overall lighting and accent lighting high power chip, or for decorative lighting and some simple auxiliary lighting, low-power chips, key technology upgrades are related to how to develop a more efficient, more stable chip. In just a few years, by means of a series of technical improvements, including chip structure, surface roughening and multi-quantum well structure, including design, LED light efficiency to achieve a great breakthrough. Thin-film chip technology is super bright LED chip production core technology that can reduce the loss of light output on each side, and can help make the bottom of the reflecting surface more than 97% of the light output from the front. This not only significantly improve LED light efficiency, but also created favorable conditions for the convenience of the lens design.

In fact, the development of LED lighting since people have been concerned about its life, build a good cooling system if relying solely on the use of low thermal resistance of the LED elements are unable to lighting devices and must be effectively reduced from PN node to the surrounding environment Thermal resistance, in order to greatly reduce the LED PN junction temperature, and the extension of the successful practice of LED lamp life and improve the actual flux goals. Different from the traditional lamps, both the printed circuit board carrier power LED is LED heat carrier, the heat sink and thermal design of the printed circuit board is very important. In addition, the luminaire manufacturer must also consider factors quality, thickness and size, and thermal interface connection, such as heat treatment and materials.

The optical design of LED lighting compared with conventional lamps, directional and point light source is the most typical features of LED lamps is also the crux of the optical design. By Binary LED optical design, LED lamps can achieve better light distribution curve. As the largest indoor lighting light LED lighting applications market development need to be very bright, you can use high transmittance shade improve light extraction efficiency. Or light guide plate technology will be applied to the lamps, which will change the LED light source is a surface light source, not only can improve the uniformity of light fixtures can also prevent glare. You can also meet some of the condenser lens or reflector to illuminate objects to use to highlight the effect of concentrating optics to achieve the desired effect real.

Technical challenges of high power LED lighting, even in indoor LED accent lighting and decorative lighting applications has been satisfactory performance, but in general lighting and atmosphere lighting applications still faces many challenges, including initial costs, a low temperature The luminous efficiency, color rendering index and system reliability. Interior lighting costs are relatively sensitive factor, especially in the home lighting applications. Although more and more LED lights Model, luminous efficiency is improving, but the price is high the problem still exists. But when the LED light source to lower prices, the overall system design to optimize the total cost will inevitably decline.

Low color temperature of 4000K or less luminous efficiency LED lamps improve the low color temperature is usually preferred indoor home lighting. Warm white make the whole environment more warm and relaxed; while giving the cold white light is clean, efficient, bright feel, more suitable for office and outdoor lighting. LED lamps extend life and improve system reliability. In general lighting applications, LED's overall efficiency, service life and reliability of the system can be optimized through can be improved. LED light source: compact, efficient, and output power of a variety of colors to choose from. Power Conversion: AC, battery and other power conversion efficiency as a safe low-voltage, constant current power supply. Control and drive: the use of electronic circuits to achieve constant current LED drivers and control. Thermal Management: To achieve a longer life, LED junction temperature control is very important, thermal analysis is indispensable. Optical elements: lenses, reflectors or focusing the light guide plate material in the optical element necessary for the target area.

With the rapid development of LED technology, and gradually increase the efficiency of LED light, LED applications will be more extensive. Especially with the growing global energy shortage, people are increasingly concerned about the prospects for development in the LED lighting market, LED will replace incandescent, tungsten and fluorescent light source potential. In addition, the interior lighting design, LED will tend saving, humane and artistic.

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Created on Dec 31st 1969 18:00. Viewed 0 times.

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