Tongxiang Twinkle Lighting Co.,Ltd
The difference lies in the involved physics: an energy-saving lamp is a low-pressure discharge lamp, whereas an ordinary incandescent light bulb is a thermal radiator. In an incandescent light bulb, current flows through a fine wire, causing it to glow. The tungsten metal wire heats up to around 2,500°C, which means that most of the radiated power is invisible infrared radiation ¨C in other words thermal radiation. The bulb converts only around 5£¥ of the energy into light, achieving a luminous flux of 7 to 15 lumen per watt of electrical power.
Energy-saving lamps, which produce between 30 and 70 lumen per watt depending on the design and output, operate on an entirely different principle. Inside them, a filament emits electrons when it is heated to a maximum of 1,500°C. These electrons race around the inside of the tubes where they hit mercury atoms. This produces invisible ultraviolet light. Only when this light hits the internal coating of the tubes (= phosphor) is it converted into visible light. Depending on the composition of the phosphor, the light color will be warmer or cooler.
In addition to tube versions, energy-saving lamps are available in many classic designs, including candle and bulb shapes.
The first energy-saving lamp, which OSRAM launched in 1985, was extremely long and had a relatively large diameter. The lamps have since become much smaller and, depending on the type, are now as small as ordinary light bulbs.
Each energy-saving lamp has a white section between the glass and the base.This is where the electronic control gear is housed. It gives consumers a clear indication of whether the product is an energy-saving lamp or an incandescent lamp.
The development of LED Light industry in our country has some obvious characteristics: as a whole, most of them are run by private enterprise, the employee is young, the speed of profession growth is quick, the ability of technique innovation is strong, the profession market competition is fury and take price as the mainly compete means, the number of scaled framework enterprise is comparatively less.
Entering the new century, the photoelectron industry gets the social extensive value, the information manifestation technique develop quickly, some business enterprises with real strengh and influence hold the LED Light industry as their main content in their stratagem of management and development, setting their feet in LED Light industry in succession. China joined in the WTO, Beijing holds 2008 Olympic sports games, Shanghai holds 2010 world expositions, Guangzhou Asian Games and other important and popular affairs provide good chances for the devopment of LED Light industry.
Prospecting the development of LED, the following trend is remarkable:
Firstly, whole LED Light will become the new growth point for the LED industry, which also contains a tremendous market. As the improving function of LED material, the appliance enhances while the cost of whole LED Light descends. At the end of 2003, the number of whole color LED Light reached more than 600 pieces. Withing regarding to the comprehensive level, local whole color LED Light removed the advantage of the price and the localization service which whole color display screen holds, the gap between our products and foreidn products has been reduced in the technique depth, production technics,etc. Adopting the SMD stick technique, indoor whole colorful LED Light develops rapidly and they will become the predominant development product in indoor use Lighting.
secondly, the development of semi-conductor illuminate also will form new development opportunity for totally promote the LED light industry.
At the time of large-scale using of LED light, LED as a new illuminating light source has obtained a breakthrough developmentduring these years.
The traditional light source of lighting is mainly incandescent lights and fluorescent lamps,which cannot meet people”s satisfaction in the credibility,electricity consume, service life,etc. Recent years, the decoration lamp, the city view light and other lights with the light source of LED release continuously and the market for the lighting lamp with LED light source is becoming and presenting a up-trend.Especially the potential for them to be used in city sight, dangerous district, emergency and other aspects is very big.
The 2010 APEC (Applied Power Electronics Conference and Exposition) kicked off in Palm Springs Monday, and among the early highlights you will find several LED-centric developments. The power-electronics IC community has embraced LED lighting as a key application going forward, and the current trend appears to be more efficiency and power factor correction (PFC).
On Semiconductor, Fairchild Semiconductor, and Infineon have all made news in the LED space. Along with efficiency, other headlines include TRIAC dimming and varying power-supply topologies.
On Semiconductor launched the NCL30000 driver that is mainly used in critical-conduction-mode flyback supply architectures, although it can also support buck topologies. The IC can implement a single power stage working from the AC line, eliminating the need for a DC/DC stage.
The design includes power factor correction (PFC). In a power supply, PFC circuits control input current to the load attempting to keep voltage and current in phase and to make the load appear purely resistive. A resistive load allows most efficient usage of AC mains power. PFC is expressed as a fraction of unity and the On Semiconductor component achieves a 0.95 rating.
Targeting residential and commercial applications, the NCL30000 also offers the efficiency needed for certifications such as Energy Star. In fact the IC can maintain efficiency even at very light loads and can implement TRIAC dimming to less than 2£¥ of full light output.