Dimmable LED lighting design technical issues need to be considered

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Incandescent bulbs per watt to produce 10 lumens, LED manufacturers claim per watt LED lamps can achieve up to 100 lumens. However, the limitations of the shape and maximum working temperature LED difficult to realize its full potential. Performance of the best LED replacement lamps, the efficiency can reach 50-60 lumens per watt. Therefore, LED lamps, CFL lamps in terms of efficiency standards have been equally matched (Note: CFL lamp efficiency range of 60-70 lumens per watt, and the limited potential for improvement).


Ecological problems are also increasingly subject to public attention. With the increasing awareness of environmental issues of global warming and climate change, the idea of ??saving resources and energy is becoming the main points of the marketing strategy. Reduce vehicle fuel consumption and the incandescent lamp is disabled in the past 10 years, a good illustration of this trend. The global multi-national government has developed the incandescent phase-out schedule. Some public policy specifically for energy saving and environmentally friendly "eco" products to provide generous tax support or other financial help.


The inherent advantages of LED s is very eagerly looking forward to meet the publ ic safety, energy saving and environmentally friendly lighting solutions. LED, there are many other advantages such as higher dimming capability, long life and smaller form factor size, shape, color, life and cost to open the door.


LED lighting solutions in all aspects of mechanical, optical, electrical and thermal-compatible alternative to traditional lighting sources (fluorescent lamps, CFL energy-saving lamps, halogen or other incandescent) is an industrial change. Business, office and residential lighting market calls for high quality downlight led modified fixtures. Although cost is still a major obstacle for these solutions, but also need to pay attention to the following technical issues:


[1]. Electrical compatibility with the existing infrastructure, particularly in the use of standards into the wall socket dimmer.


[2]. Shape shall be screw type


[3]. LED heat problem must be solved


1.1 dimmer compatibility


At present, the family, hotel and office space, lighting control equipment are designed and installed for incandescent. Dimming function best approach is to use the electricity cut phase dimmer. The dimmer principle developed for the incandescent lamp power supply. From electricity, incandescent can be regarded as a resistive load.


Electronic lighting source (such as CFL energy-saving lamps or induction lighting lights) electrical equivalent load is no longer a pure resistive load. So that the dimmer work on very different. Improper load use will cause the system malfunction may be very uncomfortable flashing, and even damage to the fixture or dimmer. This may lead to user dissatisfaction, thus postponing the adoption of LED solutions. At present, the dimmer is still expensive and difficult to install. Ther efore, the introduction of high-quality solutions compatible with existing dimmers to honor the commitment of LED lighting to promote the inevitable.


Phase cutting dimmer different types, but the working principle is basically the same (ie, cut off some of the power sine wave in each cycle). This can be done through the switch. Switch is turned on, the power delivered to the load (light bulb). Switch is off, no power supply. By adjusting the switch on time, you can adjust the total energy delivered to the load.