Analysis of the technical requirements for the development of LED lamps to indoor lighting

According to the analysis of the next five years, the development of LED indoor lighting will have exponential growth trend. In 2011 its output will reach tens of billions of dollars. In particular, in 2009 the EU took the lead in the implementation of the plan to disable incandescent lamps, as well as energy-saving issues of concern, creating a huge market opportunities and bright prospects for LED indoor lighting.

LED lighting market opportunities, broad space for development. LED lighting applications have been developed from the past outdoor landscape lighting LED to indoor lighting applications. According to the analysis of the next five years, the development of LED indoor lighting will have exponential growth trend. In 2011 its output will reach tens of billions of dollars. In particular, in 2009 the EU took the lead in the implementation of the plan to disable incandescent lamps, as well as energy-saving issues of concern, creating a huge market opportunities and bright prospects for LED indoor lighting.

The development of high power LED lighting depends on two elements:

First, the chip itself; two is the lighting technology, including heat dissipation, optical, drive. The first is the chip, at present, the key to the development of LED chip technology is the base material and epitaxial growth technology. Based on the traditional material of sapphire, silicon and silicon carbide, the development of new materials, such as Zinc Oxide, gallium nitride. Whether it is a high power chip for key lighting and overall lighting, decorative lighting or for low power chip and some simple auxiliary lighting, key technology upgrades are related to how to develop more efficient and stable chip. In just a few years, with the help of a series of technical improvements, including the chip structure, surface roughening treatment and multi quantum well structure design, LED achieved a great breakthrough in the light efficiency. Thin film chip technology is the core technology in the production of ultra bright LED chip, can reduce the side of the light output loss, and with the bottom of the reflector to make more than 97% of the light output from the front. This not only significantly improves the light efficiency of LED, but also creates a favorable condition for lens design.

In fact, people from the development since the LED lighting has been the concern of its life, if only rely on the LED element using low thermal resistance is to construct a good cooling system for lighting device, and must be effectively reduced from the PN node to the thermal resistance of the surrounding environment, can greatly reduce the PN node temperature of LED, and the successful practice of extending LED the service life of the lamp and improve the actual flux target. Unlike conventional lighting, printed circuit board is not only the power supply of LED, but also the heat carrier of LED, so the design of heat sink and printed circuit board is very important. In addition, the lighting manufacturers should also consider the quality of the material, thickness and size, as well as the heat treatment and connection of the interface and other factors.

Analysis of the technical requirements for the development of LED lamps to indoor lighting

Compared with the traditional lamps, the directional and point light source is the most typical feature of LED and the key of the optical design of LED. Through the LED two yuan optical design, LED lamps can achieve better light distribution curve. As the current LED lighting development and application of the market's largest indoor lighting needs very bright light, you can use a high transmittance lampshade to improve light extraction efficiency. The light guide plate technology is applied to the lamp, and the LED point light source is changed into a surface light source. The utility model can also be used with a plurality of condensing lenses or reflectors to highlight the focusing effect of the illuminating object to realize the ideal optical effect.

The technical challenges of high power LED lighting, LED has been in focus even if indoor lighting and decorative lighting applications satisfactory performance, but still faces many challenges in general lighting and atmosphere lighting applications, including initial cost, low color temperature light, color index and system reliability. Cost is relatively sensitive to indoor lighting, especially in home lighting applications. Despite the increasing number of LED lights, light efficiency is also rising, but the problem of high prices still exist. But when the price of LED light source, the overall optimization of the system design, the total cost is bound to decline.

LED lamp to improve the low color temperature when the light effect 4000K below the low color temperature is usually the first choice of indoor home lighting. Warm white light makes the environment more warm and relaxed, while the cold white light gives a clean, efficient, bright feeling, suitable for office and outdoor lighting.

Extend the service life of LED lamps and improve the reliability of the system. In general lighting applications, the overall efficiency, service life and reliability of LED must be improved through system optimization.

LED light source: compact, efficient, there are a variety of colors and output power to choose from.

Power conversion: the AC, battery and other power efficient conversion into a safe low voltage, constant current power supply.

Control and drive: the use of electronic circuits to achieve constant current drive and control LED.

Thermal management: if you want to achieve a longer service life, control the temperature of the LED node is very important, thermal analysis is indispensable.

An optical element: a lens, reflector, or light guide plate is an optical element that focuses light on the target area.

With the rapid development of LED technology and the gradual improvement of LED light efficiency, the application of LED will be more and more widely. Especially with the increasingly serious global energy shortage, people pay more and more attention to the development prospect of LED in the lighting market. LED will be the potential light source to replace incandescent lamp, tungsten filament lamp and fluorescent lamp. In addition, in the interior lighting design, LED will tend to energy saving, human and artistic.