With LED technology received widespread attention as a new generation of lighting technology in recent years, LED power grows and heat dissipation problems is being paid more and more attention. After long time observation, researchers find lumens depreciation and lifespan of LED has direct connection with its junction temperature, which may arise if heat dissipation is bad thus makes lifespan shortened.
Unlike previously used incandescent lamp and fluorescent lamp, though energy loss is big, yet most of the energy is directly dissipated by infrared radiation while light source produce less heat. But for LED, all energy is transformed into heat except partial energy being consumed as visible light . Besides, in recent years, electronic products gradually are developed to higher density and higher integration ones, in which LED products is not exceptional. Therefore, solving LED heat dissipation has currently become the key issue to improve LED performance and develop LED industry.
LED’s causes to dissipate heat:
The reason of LED dissipating heat is the electrical power can’t 100% be changed to light energy, whose part is converted to heat energy. LED’s luminous efficacy currently is only 100 lm/w, among which electro-optic conversion efficiency is only about 20 ~ 30%.That is to say, about 70% of electrical power has been converted to heat energy.
Specifically, the generation of LED junction heat come from two factors:
Internal quantum efficiency is not high, which means, electrons cannot 100% produce photon when compound with holes, usually as a result of “current leakage” lowering compounding ratio on PN area. Leakage current multiplied by the voltage, its calculated value is the power that has been converted into heat, but it does not occupy a main component part, because now the internal efficiency of photon is close to 90%.
Photons produced interiorly cann’t all emit out the chips and thus finally be converted to heat, which part is the main; because efficiency of these named external quantum is only about 30%, most of which is converted into heat.
As previously mentioned, although luminance efficiency of incandescent lamp is very low, only 15 lm/W, but it can mostly convert electrical power into light energy to radiate out. Most radiant energy is infrared, so the luminance efficiency is very low, but can be exempt from the heat dissipation problem.
Solutions to LED heat dissipation:
Solutions to LED heat dissipation mainly come from two aspects: before encapsulation and after encapsulation, which can be understood as LED chip heat dissipation and LED lamps heat dissipation. The former is mainly related to board ,and selection and technology of the circuit, which temporarily won’t be discussed here. This article mainly introduces Led lamp heat dissipation, because LED chip made into Led lamp thus heat generated by Led chip will finally emit out to air through the shell of lamps. LED chip thermal capacity is small, thereby a little heat accumulation will make chip junction temperature increase rapidly; so, if heat dissipation is not good, its lifespan will be quickly shortened when working in the condition of high temperature for long time. However, this heat need go through many procedures to be emitted out chip to the outside air. In particular, the heat produced in the LED chip, emits out from metal heat block, first through solder to the aluminum substrate PCB, then through the heat conduction glue to the aluminum heat sink. So actually, LED lamp heat dissipation include heat conduction and heat dissipation in two parts.
However, LED lamp shell heat dissipation will choose different method according to the power size and operation place. Now basically has the following several kinds of heat dissipation methods:
Aluminum heat dissipation fin: the most common way of heat dissipation, use aluminum heat dissipation fin as a part of the shell to increase the heat dissipation area.
Thermal conductive plastic case: thermal conductive material is added when injecting molding into the plastic shell, to improve plastic shell’s ability of heat conduction and heat dissipation.
Air fluid mechanics using the lamp shell shape to create convection air, this is the lowest cost of improving the ability of heat dissipation.
Fan lamp shell internal reinforced with long life and high efficiency fan, this method has advantages of low cost and good effect. Merely, replacing fan will be troublesome, and it is not suited to be used outdoor. This design is relatively rare.
Heat pipe makes use of heat pipe technology to transform heat from LED chip to shell heat dissipation fin. In the large-scale lamps such as streetlight , this is a common design.
Overall current LED luminous efficiency is lower, leading to high junction temperature arising thus reducing lifespan. As we see, heat dissipation is a key issue for reducing junction temperature and lengthening lifespan.
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If you want to get the best with LED home lighting, it pays to research and learn more about LED lighting. Just like anything else you would buy for your home, it’s important to research your home lighting. With so many LED options today, there’s no reason not to have the very best.
Since advancements in the industry have come so far, there is no reason not to have the best when it comes to your LED home lighting. The first step is just to research and know what types of options are out there.
For example, did you know that LEDs can be made as small as 2mm a piece? This means you can put them in places you wouldn’t normally be able to use lighting.
They are also encased in resin and waterproof so you can put them in places that will get wet or even used them outside without worry. This means more reasons to choose LED Spotlights for your needs. You can save money and help the environment, all while getting high quality clean lighting that you can enjoy for many years to come. 
Since LEDs have now made it to the home lighting market, this means that you can find great improvements on them such as longer life spans, more energy efficiency and better performance. When people buy for their home, they want to trust in what they are buying. You can do this when you take the time to shop around and choose the best with LED home lighting.
You can use an LED light at home for just about any type of fixture or situation you can think of. If you could use a regular bulb in the lighted area, you can guarantee there is an LED version for it. Even more important, you can use LEDs in places where you cannot use other lights.
You can easily work your LED lighting into any type of décor style or design that you have in a room either permanently or as part of party or event decorations. You can even use them for outdoor or patio décor as well.
When you want to get the best with LED home lighting, first plan what your lighting needs are. When you have a goal that you need to reach, it will make it easier to choose the lights that are going to help you to reach that goal.
You will need to know if you want to replace just the bulbs themselves in your existing fixtures or if you are going for a total makeover with new fixtures as well. Your budget will also be a deciding factor since while you want the best, you want to avoid running into budgeting problems that can affect your overall plan.
There are LED rope lights, LED ribbons, recessed lighting, track lighting, lamps, floor lighting, under-the-cabinet lighting, strip lighting, pendant lights and more. Depending on what area of your home you need the lighting in, there will be a style that suits your needs the best. When you’ve done the proper research, you will know how to get the best with LED home lighting today.
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As led lighting chips cannot be used directly, so it must be fixed to the bracket for the use of the device, chip and support to pass “line” led to filling the current conductor, leads. By line is very fine, only 0.1 mm in diameter.
In addition, Due to the chip surface must be free of water, natural gas and other material erosion, so the same should be solid protection, which you would need to use transparent materials with extremely high rates of potting. General common transparent epoxy or silicone transparent chip protection of such materials.
We know that if the chip interface for direct contact with the air, because the chip material close to the light refraction coefficient of air is large, will lead most of the light is reflected back to the chip in the chip, cannot escape into the air. A case study of GaAs material, interface, chip the critical angle of total reflection of about 140, 4%^’12% photons can only escape into the air. If refraction coefficient of 1.5 epoxy chip interface, its critical angle of total reflection about 22.6 per cent, increase the rate of escape of the light. And if do with ball-type epoxy resin and air interface, its almost most of the photons can escape into the air, is reflected not only through 4%, so by choosing packaging material refraction coefficient of interface with the chip package can improve the efficiency of led light.
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LED panel light is ultrathin, energy-saving, and safe lighting, which is deeply liked by lots of consumers. It can completely replace the existing traditional panel light with advantages like color consistency, multi-selectable color temperature, high brightness, long life, low energy consumption, environmental protection, etc.. How to install the LED panel lights after choosing them? Normally, LED panel lights are installed in three methods:
Method one: bracket fixed installation
Drilling few screw holes in the ceiling first, then install sliding LED panel light frame on the ceiling with three sides fixed. After that, slide the LED panel light into the frame and screw the fourth side to definitely fix the frame. It is convenient, simple and time-saving.
Method two: wire hanging installation
Setting wiring hanging accessory on the ceiling first, then tighten the screws (hanging wire is equipped when finished at factory.) Hanging wire vertically down, the back of LED panel lights is screwed with hanging components. It is convenient and easy method. Consumers must pay attention to understand clearly whether the hanging accessories are standard accessories from factory or optional ones.
Method three: embedding installation
First install metal groove on the ceiling, then fix several protruding brackets on the back of the LED panel light. After that, put on the panel light with brackets met with the metal groove and panel light can firmly fixed on the ceiling light. Because the thickness of ceiling light is different one another, so the height between panel surface and brackets should be adjusted to avoid LED panel lights being installed above or below the ceiling surface.
The following installation issues should be noted among these three installation methods in the actual installation process: 1. make sure power is off before installation; 2.waterproof, anti-electric, anti-shock; 3. products are used on standard operating voltage, do not exceed the working voltage range; 4 this product is only used indoor; 5. Carefully read the instructions before installing the product.
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Illumination is a significant component in almost any location, business or industry – especially when a strong visual effect is vital for the promotion of the product or alternatively, the advertising of the concept. Since 1962, the light emitting diode (LED) has been used in a variety of marketable applications, the LED industry is now evolving and as such, manufacturers are now introducing a large number of ground breaking home applications. The approval of residential LEDs comes as the result of numerous diverse proposals and also, the countless ways in which LEDs can be used in the household.
In humblest terms, a light emitting diode is a semiconductor that is intended to harvest light. The original LEDs appeared in the shape of low energy devices that only produced an insignificant red light. Today’s LEDs however create a much higher strength of light, which is available in a wide range of cool and bright colours.
One of the most inspiring submissions of the LED has been in flat screen TVs and also, in computer displays. LEDs are used as the means of presenting the screen image with an astonishing clarity, tenacity and color correctness. Many favor this competing LCD technology, which is one of the reasons led bulbsare so popular today. LEDs can provide an immense image quality, and one that is easier on the eyes. TVs and computers however only make up a small part of this innovative bulb’s uses.
Led bulbs can now be seen in a variety of locations across the globe, this source of lighting is quickly substituting the traditional lighting methods. The reasoning behind this is the bulb’s efficiency, life expectancy and versatility. LEDs are up to 90 percent more effectual than that of incandescent light bulbs. Another immense quality comes in the shape of their impressive lifespan, which can last up to 15 years — seven years longer than that of a traditional light bulb. An LED also uses 80-90 percent less light energy and as a result of this, manufactures less heat. On a global basis, LEDs are environmentally friendly because they do not comprise of mercury.
Light emitting diodes are currently used in a wide range of lighting functions. They are used for aesthetic appearances in the shape of interior and exterior car lighting, traffic indications, aviation illumination, signs, smart lighting, fiber optics, medical expertise, plant illumination, security lighting and even Christmas tree decorations. In fact, LEDs can be designed for any lighting use because there are a wide range of sizes and shapes for these devices.
One of the most astounding physiognomies of LED know-how is that many of the lighting devices are now programmable. In other words, Infrared LED lighting when used in conjunction with remote controls has been predetermined to last for many years, whilst operating home entertainment systems on a regular basis. Newer “Smart Home” applications are now able to achieve several tasks:
Lighting Regulators — Modular LED lighting schemes are now able to alter both illumination levels and colours. The consequence of changing lighting can in turn create a certain ambience – all of this is possible through shifting the lighting concentration and colour.
Security and outdoor LED lighting can be integrated into a pre-existing system – when an alarm sounds – the light comes on. Another application is to create a lighting system that turns on every now and again when homeowners are away on holiday.
Home Entertainment Systems are another area to consider when it comes to using handy led bulbs — A home system can now be devised to incorporate lighting, sound, curtains and various apparatus into just the one established set of controls. This not only saves time, it also avoids clutter.
Lighting in the public sector – a number of business owners are beginning to realize the benefits of LED lighting and how it saves money, whilst offering an environmentally friendly alternative to that of wasteful incandescent lighting. Offices not only save on bills, they also save on hassle – halogen bulbs run out very quickly, which of course requires regular replacements. The replacement of these bulbs can become tiresome, especially in a busy office. Led bulbs on he other hand last for many years.
The outlook for led bulbs and LED technology is looking boundless. New applications are emerging every single day in the business sector and also in the home environment. Such lighting set-ups are said to continue to dramatically improve the way in which we live in the 21st century.
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With the development of technology, a new generation of lighting technology
LED which is energy saving and environmental protection begin to enter people’s eyes.LED light is emitting diode, it can change the electric energy into the light, The emergence of it solved the problem of incandescent lamp and fluorescent lamp,
It’s the energy utilization rate higher than fluorescent lamp , it will not harm the environment as well, it can be the best choice of the future lighting. As the best choice for future lighting, let’s see what advantages it has: first, it has 50000 hours long life span, high CRI makes it high quality, high light efficiency, no glare, Do not produce ultraviolet and infrared light, no harm to users. It has the same or better size of the traditional light, it can replace lens, driver, light source, module easily, it can replace by customers’ like and dislike, it has excellent applicability and low power, good secondary optical design, the light loss rate is low, 50% energy than traditional light, no mercury pollution, it is easy for recycling, energy conservation and emissions reduction.
Policy speed up the LED lighting popularization
State and governments at all levels has attached much importance into LED lighting because of it’s energy saving and environmental friendly. Relevant policy is published that speed up it’s development.
The “special function” of LED lighting As we all known, LED has it’s advantage of energy saving 、environmental protection, not only these, the light can change by your mood.
LED can adjust color and light according to your needs, for example, you can make your bedroom sometimes light yellow, sometimes apple green and sometimes pink…This is power saving fluorescent lamp can not reach. What’s more, because LED chips are internal, the customers can even realize wireless remote control the light, you want to turn on the lighting room light before you back home? Only a instruct is ok, this kind of life is not long from us.
There are things you can’t imagine it but not can’t do it, the famous manufacture Phillip has published a new product LED candle light, this light not only produce romantic atmosphere for our life but also reduce trouble. If you want to give your lover a sweet candlelight dinner, and you don’t want to trouble by the smoke of the candle, then Phillip led candle light is your best choice. It is like the real light, but no smoke, make people very comfortable.
These LED light not only satisfied our moods, but also bring green environment home, it’s long life span and low energy consumption meet the trends of the energy saving and environmental protection.
In the end, LED makes life more beautiful.sourcechipglen
Along with activity “prohibit incandescent lamp”is carried out around the world, potential market of LED lighting is improving hugely; at the same time, the research and development of product technology makes prices dropped. All kinds of situations indicate that LED lighting is speedily popularized. Good development prospect of global LED lighting market brings much capital into this industry, resulting in sharper market competition which makes price war inevitable. For standing firmly on this market, many LED lighting enterprises start finding breakthrough in technology.
Lighting industry structure is changing little by little, meanwhile, prices of LED lighting products are changing. Affected by technical promotion of this industry and price fall of product, price spread between LED lighting and traditional lighting is reducing little by little. Price fall of LED finished products has became a reality. Development of new technology can make price fall easier for LED lighting enterprises, besides, much capital inflow due to its good market development prospect. Price fall promotes industry interior integration and eliminating behindhand enterprises. To make sure leading the market, many large-scale companies intend to acquire some technical enterprises and regional enterprises to expand their market supply chain, and enhance their competiveness by setting up professional website or other methods.
With the help of the popularity of “prohibit incandescent lamp”, LED lighting industry is integrated step by step, for example, some small and medium enterprises that do OEM for overseas LED lighting market are obsoleted during this process, which will optimize our LED lighting industry.sourcechipglen
