LED luminous efficacy continued to increase, in order to achieve high brightness requirements, single-component power has increased a lot, especially in the ensuing run fever situation is likely because the problem of high fever, so that in bad light or life of the components relatively lower, the component if we consider the cooling demand in the FEOL thermal design is more more efficient than from external conditions, but also sustainable development of higher power, high brightness led driver 120w components in response to daily lighting applications.
Few years, environmental issues continues to heat up, so that the current status of various electricity to a great change, electrical terminals have a number of great change, such as CRT TVs LCD TV, or even a large number of energy incandescent light source countries have disabled.
Observed in 19% electricity consumption for lighting applications, import in the daily lighting energy-saving lamps, the world's energy consumption is likely to generate significant savings results, therefore, governments in order to create a more environmentally friendly image of the country. actively through policy, regulations and industry guidance toward the development of energy-saving lighting applications direction, using the LED Floodlight 80W or CCFL new light source designed to replace traditional light sources for everyday lighting applications, has also become an important development trend of the lighting industry.
The current situation of the traditional light source applications
Most practical applications, still have a large number of high-performance, high-brightness light sources, for example, street lighting, store lighting, shop lighting, high efficiency and high brightness of the lighting facilities, mostly collected high-intensity gas discharge lamps (High- intensity disc ha rge; HID) or halogen lamps, high brightness, high-illumination application requirements; while demand in the stores, shops for a long time, mostly selected fluorescent tube (the Compact Fluorescent Lamp; the CFL); residential multi-still widely used incandescent lamps, fluorescent lamps (CFL) or energy saving demands of the new energy saving bulbs. In many practical applications, the highest energy consumption and the least efficient light source to the incandescent lamp mainly because the application will make a lot of power when converted into useless heat, but also makes the lamp life and therefore reduce.
Application specific light observation, the daily lighting market covered a very wide field of applications include architectural lighting, signs, landscape lighting, retail, lights, street lighting and residential lighting. To discuss the benefits of energy-saving, it is necessary for the scientific assessment for existing lamps.
Different lighting scheme energy efficiency gap
Existing lighting applications observed, the worst of the energy efficiency of incandescent lighting scheme according to the name, for example, 60W incandescent, energy efficiency is about 10 lm / W, compared with CFL fluorescent lamps with energy efficiency up to 50 lm / W A 100W HID has a 80 lm / W, which is equivalent to a brightness of 8,000 lumens.
LED Flood light 10W light source performance and practicality dramatically
Characteristics of the LED is that in itself is an electronic components, and gas discharge HID lamp, the CFL with this type of fluorescent light source, the necessary built-in high-pressure gas to the glass container volume is relatively smaller, filled with toxic elements without group pieces of itself has a metal contact welding can install on any surface, the convenience is quite high.
LED with a future light source a number of advantages, including energy efficiency is the focus of most businesses.
LED in the past due to somewhat limited at that time, the brightness can not effectively enhance the multi-auxiliary light source used for indicative purposes, but now the white LED, for example, production methods already significantly improved, for example, through high-performance blue LED plated phosphorus approximate white glow, and significantly improved light output of a single component, the white LED has been substantial progress in energy efficiency, color temperature of 4,500 ~ 6,000 k, in the laboratory test data has to reach beyond the 200 lm / W high can show
LED is a solid state light source component, component hardness, high strength, not like traditional light sources mainly made of glass, there will be fear of fall, impatience impact the problem, with different phosphors or with a configuration design, produce various lighting effects on the overall components nor mercury, along with more than 50,000 hours of life-cycle, LED life compared to only operate for 1,000 hours of incandescent higher more.
Importing life applications are still key issues to be overcome
Due to the difference of the LED in the physical characteristics of the original device, the concept of the production of light source system is very different from the traditional design, the need for more technical and professional support.
LED bulbs design space is relatively compact, how to do the relevant circuit integration, and must rely on integrated chips to achieve design goals.
1, the optical design
LED Spotlight 30W source is an efficient point source, the light of this too concentrated in traditional applications would be a lot of problems, for example, when reading lamp use will cause the close type of light is not enough symmetry, even if the LED with a wide color control flexibility energy efficiency performance is quite good, but in life with the lighting application will affect the perception of point light source through the optical lens or institution design (lenses, light guide material) to produce light performance to approximate the traditional lamp, will increase lighting costs, more difficult in the compact configuration of the design of the physical characteristics of the optical breakthrough.
2, the thermal design
Similarly, continuation of the LED assembly itself is the limit of point light sources, the components in the light temperature is overly concentrated in a single point above, if not effectively deal with heat, which would have led components burn melt, or even shorten the life! In addition to the component itself need for thermally enhanced design, for example, through the chip to play the gold line, or improve the carrier board design techniques to achieve the thermal design of the autologous, but even so, heat, there will still be over-concentrated in the status of the lamps dot position through the external components of the active cooling and passive cooling design to improve the handling capacity of the junction temperature control, this lighting design technology gap.
3, drive and control circuit design
Practical applications, the LED drive light still requires a lot of electronic circuits for the auxiliary, in order to achieve the purpose of efficient, but for the ordinary incandescent lamp dimmer design, if you want to achieve in the new LED light source, which must be available through the DC DC electrical control, power supply adjustment, taking into account energy consumption and power efficiency, make the drive electronic circuit complexity is increased significantly on the design is to take a large number of independent components to cause the system to the discrete design problem, so the overall savings of power hand in the relevant circuit is consumed.
Existing component manufacturers to take a single-chip adjustable light control IC design, the lighting industry without re-development of the different lamps with circuit, the use of off-the-shelf solutions can achieve both contrast to old-fashioned light of operating experience, but also to achieve a more high-performance energy-saving benefits.
E27 type of LED Power Supply energy saving light bulbs, power consumption is only 6 watts.
4, the power conversion circuit design
LEDs generally take DC DC drive, AC LED in practical applications, there is more flexibility and advantages, and therefore the development of a major trend of the LED light source is very important especially in the general life of power sources are AC power, if To quickly universal life applications, the development of LED products designed by AC LED light source is a key application of the rapid growth of the related applications.