The 3D Films History

3D films have existed in some form since 1915. It was prominently featured in the 1950s in American cinema, and later experienced a worldwide resurgence in the 1980s and 1990s driven by IMAX high-end theaters and Disney themed-venues. In the 2000s, 3D films became more and more successful. Here are successful 3D movies with their released years.

1839, British scientist Charles Wheatstone invented stereoscopic glasses according to the principle “the left and right eyes of the people watching the same image but producing different results”.
1922, the first 3D movie in the world "Power of Love" showed. Unfortunately, the film has been lost long ago. Early 3D movies are mainly to show the three-dimensional effect. It often happened that pointing to the audience with gun, threw objects to audience, etc.
1952, "Adventures in Africa" which was telling an African adventure was identified as the first-ever true 3D feature film. The film's slogan is "lion in your lap, lover in your arms".

1953, the "House of Wax" and a number of 3D horror films emerged into the golden age of 3D chip in the fifties of the last century.
1954, Hitchcock made the 3D version of "Telephone Murder” and it became as one of the best 3D movies.
In 1962, China's Tianma Film Studio produced the first 3D stereoscopic film "Magician Adventure". In 1982, Disney produced the short film "Magic Tour". Though this short film is only 16 minutes, mixed performances by CGI and live action, it also created surprising 3D effect.
In 1983, the 3D version of "Jaws Ⅲ" got $ 13 million at the first week.

In 1985, the movie "Magic Crystal Fighters" became the world's first 3D animated feature film.
In 2004, the first IMAX 3D film "The Polar Express" was born. It showed on ordinary 2D screen in 2000, and 3D IMAX screen which has only 75 pieces. But this kind of 3d holographic projection was a huge commercial potential for producers.
In 2005, Disney's animated film "Chickens Story” had a new projection technology screening to eliminate eye fatigue.
In 2008, "U2 3D Concert” is the first live-action film shot entirely in 3D camera.
…
Thanks to the projection screen manufacturers, we can enjoy more and more exciting 3D movies in theater and even at home.

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This article is come from:http://www.chinaphoneparts.com/index.php/the-3d-films-history.htm

Applicable Occasions of Induction Light

Corridor LED Human Body Induction Lights

Traditional induction lights are installed in the corridor and generally are composed of two parts, the human body induction panel switch and the light source, the light source is incandescent, and the two separated in housing construction should well equip the line and position. Incandescent tungsten cannot withstand frequent switch, so every year you have to replace the broken lights, and the artificial maintenance costs are too high. LED body induction lights have built-in light source and the human body sensing device, you only need to install the screw into the general E27 base, then you can reach the body induction lamp. The lights open when people come near, and when people go, the lamp will be out. The installation placed between the corner and down the stairs can response to the upstairs and downstairs, in addition to that the induction light source life is long, low-voltage operation, so the frequent switches do not have impact on it. Now the residential buildings is not the same as the conventional single-family detached, high-rise buildings in the estate, and there were several dozens of families, LED human sensor lights installed in each floor public corridor is very appropriate, whenever the owners come back home, or come out from the elevator, the LED sensor light will be bright, in the 1-minute time delay, the owners have enough time to open their own door and into the house.

Balcony LED Human Body Induction Light

In the past, the balcony lighting is an incandescent lamp or ceiling light. The balcony belonging to the semi-outdoor, when open the lights at night, mosquitoes and flies will turn around the lights, and do not remember in life from time to time off the balcony lights. If LED Ceiling induction bulbs or the human body sensors light bulbs are installed in this position, these two issues can be resolved, LED is a cold light source, no ultraviolet, will not provoke mosquito, intelligent sensing body in the balcony during light lit people left the lamp, and it is power-saving and convenient.

The Toilets LED Human Body Sensor Lights

Maybe you may ask: Isn't the LED human sensor lights installed in the toilets not afraid to wet? Do not worry. The housing of the lamp body is plastic, LED lamp beads are not afraid of humidity as the light source. When people are in the toilet, the light is in the lit state, when people walk away, since they do not have to switch, so they completely no need to worry the wet hands risk of electric shock.

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Work Principle of CFL Energy-saving Lamps

The introduction of CFL lamps

Energy-saving lamps are called trichromatic electronic compact fluorescent lamps (CFL lamps), and it was first invented in 1978 by foreign manufacturers, because it has the features of high luminous efficiency (which is five times that of ordinary cfl lamps), significant energy savings, long life (is ordinary the lamp eight times), small size, ease of use, it is valued and welcomed by the peoples and countries, in China 1982, first in the Lighting Research Institute of Fudan University successfully developed the SL-type compact fluorescent lamps, the past two decades, the production rapid growth, steadily improving the quality, the state has as promotion and use it as the national focus on the development of energy-saving products (green lighting products).

The working principle of the energy-saving lamp

The working principle of the energy-saving lamp ballast to the lamp filament heated to about 1160K temperature, the filament began to emit electrons (because some electronic powder coating on the filament), electron impact inelastic collisions of argon atoms, argon atoms after the collision energy and the impact of mercury atoms mercury atoms absorb energy transitions produce ionizing issued 253.7nm UV ultraviolet excitation light-emitting phosphors, the fluorescent work filament temperature of about 1160K, the working temperature than incandescent 2200K -2700K is much lower, so its life span is also large, up to more than 5000 hours, because it does not exist as current incandescent thermal effect of electronic ballast, the energy conversion efficiency of the phosphor of electronic ballast is also very high, reaching more than 60 lumens per watt.

The information of ordinary incandescent light

Ordinary incandescent light efficiency is about 10 lumens per watt, and the life is about 2000 hours or so, it work principle is when the lamp is accessed to circuit, the current flows through the filament, and the heating effect of current incandescent issued continuous visible and infrared, this phenomenon in the filament temperature to rise to 700K can be aware of the work when the filament temperature is high, most of the energy is wasted in the form of infrared radiation. In quite a long period of time, some places and manufacturers have carried out the energy-saving lamp projects while capital, technology, raw materials and process have been not fully implemented, so that the product quality cannot be guaranteed, the quality of products for enterprises the imbalance, some manufacturers do not follow process requirements, lamps and components assembly plant selection undesirable patchwork composition, quality second lowest, serious damage to the reputation of the energy-saving lamps, the luminous efficiency is low, life is short, consistency, community energy-saving lamps Energy Saving money is not festival saying, bring a lot of negative impact to the promotion of energy-saving lamps.

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This article is come from:http://www.chinaphoneparts.com/index.php/work-principle-of-cfl-energy-saving-lamps.htm

Teach You How to Buy LED Panel Lights

Current situation of LED panel light market

In recent years, since the rapid development of LED lighting industry, LED lighting product advantage has been recognized by the people, and also won the strong support from national government, directly benefit the lighting fixtures manufacturers producing LED panel lights. The energy-saving, environmental protection, high light efficiency, long life and other effects of LED panel lights attract many led panel light manufacturer to be actively involved in the LED panel light production factory ranks. Due to low LED lighting industry barriers to entry and blind investment of some manufacturers, it leads to the quality of LED panel lights on the market varies greatly, LED lamp prices also vary widely. With the development of the market, consumers have to polish your own eyes, calmly and scientific select the best cost-effective LED lamps.

LED panel lights are widely used in indoor lighting

LED panel lights are more and more widely used in the field of indoor lighting, but how to properly buy LED panel lights has become the problem that people are most concerned about. Let’s work together to understand the performance of the LED panel lights as well as how to purchase. We first directly see the quality of the LED panel lights from nine aspects.



1. Brightness. Different LED brightness, different prices. LED for LED lamps shall comply with Laser Class I standard.

2. Antistatic ability. LEDs with strong antistatic ability have long life, and therefore prices are higher. Usually LED static more than 700V can be used for LED lighting.

3. Wavelength. LED with consistent wavelength has the same color. If the color is required to be consistent, the price is high. It is difficult for LED Tube manufacturer who have no LED testing instrument to produce pure colors.

4. Leakage. Current LED is the one way conductive light, if there is reverse current, it is called leakage; the LED with large leakage current has short life, and available at low prices.

5. Glow. LED with different angle uses has different beam angle. Special light-emitting angle, the price is higher. If all diffusion angle, the price is higher.

6. Life. The key to different quality is life, and life is decided by the light fades. Small light decay, long life, long life, high price.

7. Chips. The light-emitting body of LED is a chip; different chips, the price varies greatly. The chips from Japan, the United States are more expensive, generally the prices of chips made in Taiwan are lower than Japan and the United States.

8. Chip size. The size of the chip is represented by edge length; big chip LED quality is better than the small chip. The price is proportional to the chip size.

9. Colloid. Ordinary LED colloidal is generally epoxy resin, the price of LED added with UV resistance and fire retardant is expensive, high-quality outdoor LED lighting should be UV and fire proof.

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This article is come from:http://www.lightingequipment4u.com/teach-you-how-to-buy-led-panel-lights/

Notes for Battery Selection and Use

How to choose and buy the battery:

1．Choose battery products with "state inspection", "Chinese famous brand" logo, and local brand-name battery products, because the quality of these products has a certain degree of protection. 2．Select the applicable battery type and size specifications in accordance with the requirements of the electrical appliances, and buy the battery of electric appliances in accordance with the power consumption and characteristics of electrical appliances. 3．Note the production date and shelf life of the Vinnic batteries, purchase recently produced battery (new battery); the performance of a new battery is good. 4．Pay attention to check the battery's appearance, you should buy battery with exquisite packaging, neat and clean appearance, no leakage signs. 5．Pay attention to the sign of the battery, the battery shall be marked with production plant name, battery polarity, battery models, nominal voltage trademarks; sales packaging (such as two heat-shrinkable or four heat-shrinkable, or tag hanging card) should have Chinese site, production date and shelf life or indicate the deadline for the shelf life, the implementation standard number. When you buy alkaline manganese batteries, you should see whether the Model has ALKALINE or LR words. 6．Because the mercury in the carbon zinc batteries is harmful to the environment, in order to protect the environment, you should select batteries whose trademark labeled with "mercury-free", "0% mercury", "no added mercury" at the time of purchase.

Matters need pay attention in the use of battery:

1. The electrical and battery contacts should be clean, wipe with a damp cloth when necessary, and load correctly according to the polarity mark after drying. Please see the battery polarity when installing ("+" and "-"), the installation is very important. The recommended batteries should be installed according to the manual requirements of the appliances; it will result in appliance malfunction, damage electrical appliances and / or battery if not according to specification requirements.

2. All batteries in a battery pack should be replaced at the same time, do not mix old and new batteries; do not mix use batteries of same model but different electrochemical type or brand, otherwise it would be a set of batteries in use will be in over-discharge state, thereby increasing the possibility of leakage. 3. The disposable batteries cannot be renewed by heating or charging, otherwise it may explode. 4. The battery cannot short-circuit, in order to avoid the battery leak and heat insulation damage to packaging. 5. If the electrical appliances are not used for the long-term, then you should timely remove the battery, turn off power after use, in order to avoid the battery to continue to discharge and make its internal adverse chemical reaction to cause the leak. 6. Waste batteries should not be thrown away, separately put them from other garbage as far as possible.

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This article is come from:http://www.chinaphoneparts.com/index.php/notes-for-battery-selection-and-use.htm

When will 5D Film Era Arrive in China

5D movie is originated in South Korea. In 2009, it was introduced into China. 5D movie containses all the features of the 4D Theater, in addition it has interactive features with using special effects seat and environmental effects 5D Movie Theater provides special surreal visual experience with irritating effect of vision, hearing, smell and movement.
In China, during recent 3 years development, 5D movies now have sprung up in the front-line city walking street, large squares, playgrounds and other places. But when will the the real 5D film era arrive? Let’s wait and see.

5D movies in China still have many shortcomings in the development process, mainly in the following aspects:

First, lacking of inter-disciplinary talents

The 5D movie is a combination of technology and culture. To produce the high quality of 5D movie, inter-disciplinary talents who master in movies and technology are needed. Right now the 5D cinema staffs are mainly technical personnel, which resulted in the 5D film re-simulated experience light film culture situation. It greatly reduces the 5D film appreciation and artistic value. Countries should vigorously promote the 5D film inter-disciplinary talent training and transport fresh blood for 5D movie.

Second, lacking of software device

The showtimes and independent scene both depend on the essence of the movie. The 5D requires better playback system than the traditional theater. Many devices on the market only do the traditional hierarchy true representation of certain constraints. Most of the audiences don’t have good review of the 5D movie, they even have uncomfortable feelings. The main reason is the device software is unqualified.

Finally, less inverstment of 5D cinema

Most of the 5d cinema equipment is now a mini-museum experience with smaller investment. However, the constructions of a 5D Theater cost millions and make many investors think it is a risk. The 5D cinema development needs huge funds to promote the integration of resources in order to accelerate the pace of development of 5D cinema with international standards. When the timing is mature, large-scale investments will become a necessity. The 5D movie will become a new growth point of the Chinese film and its development prospects are very impressive. 3D movies in the Chinese market in 2008 set off a digital film revolution. Two years later the emergence of the 4D movie completely attracted the attention of the audience. The 5D movies will directly replace 4D movie. But in domestic 5D movie is still in its infancy, there is a long distance away from the popular stage in the development process. We have to constantly improve the technical level to enhance the combination of strengthening 5D movie technology and art.

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This article is come from:http://www.soundspeakers.cn/index.php/when-will-5d-film-era-arrive-in-china.htm

The Industrial Characteristics of LED Products

The prices of mainstream products LED

Currently, the price of the 1W white LED with the luminous flux of 70 ~ 90lm in the market is basically maintained at 17 yuan, and the price of the domestic production of High Power LED is basically 5.50 yuan. Along with the rapid growth of its luminous efficiency of the power white LED applications upgrade, the single LED prices are expected to gradually be reduced.



Second, costs and the heat dissipation is still the biggest obstacle to replace the traditional lighting.

Lighting is the most attractive application field for LED, the cost is critical for the LED to replace traditional lighting. Relative to its exponentially in the service life of traditional lamps, the price of LED is not high, and can save the costs late replacement and maintenance, but the start-up costs are often subject to direct purchase budget. Mingxue Optoelectronic believes that the main bottleneck impacting the current LED applications lies in the lumens cost is 10 times more than traditional lighting source. So the light efficiency has to be improved to 150lm / W, and drive current is promoted from 700mA to 2A, at the same time the die and package cost will be reduced by half, which can obtain the popularization and application in the field of lighting to large-scale. The LED package is to integrate light and heat in a single device, and heating will bring the largest impact on the led power supply devices, if the lighting is alway in the case of the high-temperature, it will greatly affect the life of the lighting devices or fixtures, LED lighting package structure poses a severe challenge.

Third, the prospects of high-power LED domestic market is broad

Currently, landscape lighting market is the largest high-power LED lighting applications market and its share is about 43%. It's a new round of rapid growth is bound to bring a new impetus to the development of high-power LED lighting industry. In addition, through the positive improvement of the global high-power LED technology leader in materials, processes and packaging technology, high power LED luminous efficiency and performance is increasing very fast, high-power LED has begun to go into the indoor and outdoor general lighting, automotive interior and exterior lighting, searchlight and other new markets. The high-power LED lighting industry will obtain the development by leaps and bounds in the next 3 to 5 years, to subvert the traditional lighting industry pattern.

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This article is come from:http://www.lightingequipment4u.com/the-industrial-characteristics-of-led-products

10 “Have To Pack” Items for Traveling

Travel preparation packaging is always a big problem for travelers. But no matter where you will go, remember to bring the following ten important items. Hope the tips can make your preparation much easier: 1.Money and wallet You work hard to earn money all the time. And now is the time to have fun! Buy a nice wallet and put in credit cards, passport, cash and other personal preservation. Remember that carry it with you all the time. 2.The world travel adapter World travel adapter is 100% essential for traveling abord. You’d better choose the right travel adapter depends on your destination countries. For example, usa plug adapter is perfect for America travel.



3.Travel shoes

Wear fitting shoes and bring quick-dry socks in order to avoid foot moisture. Wear the heaviest shoes on the plane and take one more lightweight shoes so that in the long-haul flight, you can take off your shoes to get rest. 4.Medipaks Do not forget to bring the pills, bandages, soda, hemostasis tampons, sunscreen, insect repellent, and so on. 5.Books Take books on the road to read, you can also exchange books with other travel companion. Choose a travel books related with destination country or the nation. 6.Easy-to-dry coat Heavy cotton, wool, linen clothes are heavy and outdated. They are inappropriate for touring. Easy-to-dry clothes are more convenient. 7.Four season clothing Although the clothes you take depend on the climate of the destination and your travel project, in general, a lightweight raincoat is necessary. This raincoat should have pocket and hood. If you take windcheater, it should be bigger so that you can wear more clothing inside. 8. Waterstop plug Travelers all know that the waterstop plug is important. Without it you could not soak a shower or washing clothes in the pool water. Generally the waterstop plug can apply to a variety of sinks. Also take a packet of washing powder. 9.Plastic bags Dirty underwear and wet bathing suit need to be stored separately in different plastic bags. 10.A good traveling companion Traveling companion is good. But it is also wonderful by traveling alone! So let’s do it now!

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This article is come from:http://www.mobilesaccessories.net/index.php/10-have-to-pack-items-for-traveling.htm

LED Lamps Export "New World" Emerges

China LED Lamps Export Status Quo

Even when the market remains in the doldrums, and under the context that the export ports of Europe and the United States are blocked, domestic lighting export growth momentum remains good. Seen from the export product composition, incandescent export is essentially flat with last year, the energy-saving lamps exports declines by 1.4%, fluorescent lamps exports declines by 6.5%. In addition to the remarkable LED growth lighting products, other categories have shown a downward trend. China's exports accounted for 30% of the global lighting trade volume of lamps. Which compact fluorescent lamps (CFL) and Christmas lights occupy more than 80% share of the global market, the incandescent also accounts for 1/3 of the global market share, and the proportion is still expanding. Since 2008, the domestic LED industry is booming, there is huge market potential, attract domestic and foreign enterprises in this land staking siege slightly pools. In just a few years time, China has become the world's largest led lighting residential fixture exporter.



Short Board of LED Lighting Export

Related statistics show that the third quarter of 2012, the port of Xiamen LED kitchen downlights exports grew five-fold to $ 70,110,000; Hangzhou LED lamps and lanterns exports reached $ 100,000,000, an increase of 34.67%; Shaoxing LED lamps exports amounted to $ 69,440,000 , with an increase of 133%. LED lighting is in a relatively weak market environment, against the trend. As for the export geographical constitute, the United States is topped, accounted for 20.20% of total exports; followed by Japan and Germany accounted for 17.2% and 7.6%, respectively; Although Hong Kong has a large export volume, but is mainly confined to the re-export trade. Although the United States is the largest exporter of domestic LED lighting, but the barriers to entry are relatively high. LED lighting products in order to enter the United States of super retail channels, they need to obtain the UL and Energy Star certification. Meanwhile, the U.S. government introduced subsidies for LED lighting products, which led directly to the lower price of LED lighting products, only to take the path of "puerile". In the Japanese market, the 2013 years, the export situation will undergo great changes.

The LED Fixtures Export "New World"

During the first three quarters of last year, both the U.S. and European markets, the Japanese market, LED export has a contrarian growth. However, to enter the market, it is inevitable to encounter technical certification, especially patent lack of distress, making the export of domestic LED enterprises frequently blocked. In recent years, Russia, Thailand and Africa LED demand have become a new LED lighting export market. Southeast Asian market demands for great LEDs, and the policy is very attractive. The statistics show that of the relevant bodies, Thailand lighting market size is about 1.4 billion RMB in 2012 to about 12%, including LED, expected by 2015, the proportion will increase to 45% -50%. More important, as long as the Chinese enterprises get the certificate of origin of the domestic LED products export to Thailand can enjoy zero tariffs, but the price of Thailand is 2 times of China’s. The products exported to Thailand, only those through the Thai the TIS system of certification (similar the domestic CCC certification) can be sold in the Thai market.

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This article is come from:http://www.storage-battery.com/index.php/led-lamps-export-new-world-emerges.htm

Must-have Family Helper - Baby Monitor

Introduction of Baby monitors

Baby monitor is a wireless home security system, composed of two parts, monitor (monitoring terminal or baby unit) and display (controlling terminal or parent unit). Placing a baby monitor in the baby's room, parents can monitor the baby's safety at any time through the display. Baby monitor, as a family security product, offers real-time monitoring about babies' every act, every move, every word and every action by the monitoring terminal. The monitoring results are sent to the controlling terminal devices by radio waves of the analog signal or digital signal and are restored to video or audio. By the use of a baby monitor, parents or guardians could be no longer glued to babies waiting at the side to capture their behavior, and when abnormal situation appear, they can immediately detect and deal with.Digital Baby Monitors are not only the best infant daily life care products, but also good must-have helpers to care for the elderly and patients.

The application Range of The Baby Monitor

Baby monitors have greatly improved the freedom and flexibility of the parents' life. With this device, parents can handle other affairs in another room or even outdoor courtyard. At the same time, the babies' situation is also well at parents’ fingertips. Parents do not have to always live in fear, so that the baby monitor is a good family helper for parents. Except for being used for baby care, baby monitors are also suitable for elderly care, supermarkets, offices, companies, schools, families, hospitals, and other safety protection of small places.



Baby Monitors with Camera (baby cams) Some baby monitors also use a video baby monitors with camera to show pictures on the receiver, either by plugging the receiver into a television or by including a portable LCD screen. This type of surveillance camera is often called a baby cam. Some baby cams can work at night with low light levels. Most video baby monitors today have a night vision feature. Infrared LEDs attached on the front of the camera allow a user to see the baby in a dark room. Video baby monitors that have night vision mode will switch to this mode automatically in the dark. Baby monitors continue to evolve and now also can utilize features such as night lights and built-in lullabies. These are not available in all monitors.

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The Impovement of LED Spot Lighting

LED point light source is a point light source, if the application is not good, and prone to glare from the whole industry chain, LED lights, radiator, drive, replace all of the high-pressure sodium lamps cost is not necessarily cheaper. Hangzhou Bulletin the Wu Ming Fan, LED spot light, director of the Institute, the LED lamp technology requirements, require advanced large-scale replacement.

In addition, the indicators of the evaluation of road lighting “illumination” are better than “brightness”. The various little throat professor pointed out that LED spot lighting can be replaced by the brightness of the light distribution to achieve the bat LED spotlights. The actual situation The brightness expensive measuring instruments penetration is not high, so for the convenience of the general lighting, rather than brightness. The evaluation system is flawed, difficult to guarantee the quality of LED lights.



Promoting the dimming LED spot light renovation project for the government of the most powerful companies also has their own views. "Subsidies to promote government can solve the urgent needs of the enterprise, but need the ability to save the government project eligibility successful product in the end simply different, and to rely on time to test. " said by a street lights manufacturer, who worried that the government palliatives, excessive administrative intervention may become secondary LED street light manufacturing industries. At the same time, he also pointed out that the face of the impetuous market, and companies need a clear direction of their own development, rather than the government-supported projects.

Living in a green manner is not always as straightforward as we’d like it to be, certainly if the media is anything to go by. Obviously, given the choice, many of us would want to affect a positive change where the environmental issue is concerned but beyond this desire to do the right thing, it can be hard to know what changes you can make which will make a decent difference.

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This article is come from:http://www.mobilesaccessories.net/index.php/the-impovement-of-led-spot-lighting.htm

U.S Scientists have Developed Warm White LED Light New Materials

Warm white LED lights have been developed

As we all know, LED (light emitting diode) lights are energy efficient and have longer life expectancy, but the current LED lights are mainly light blue luminescent lights, which hindered its popularity in the field of indoor wholesale lighting. Today, warm white LED lights have been developed by scientists at the University of Georgia, USA, which are said to be the world's first to use single phosphor and single light-emitting unit. The paper details about this material are published in the latest issue of Optical Science and Applications journal of Nature Publishing Group.

Two indicators to measure the quality of artificial light

The paper's lead author, Pan Zhengwei, associate professor at the University of Georgia said: "At present, the white LED lamp is used on flash and auto headlights, the light blue luminescent they emit is less likable, especially in indoor lighting field. Our materials have achieved warm color temperature, while at the same time achieved a realistic color reproduction. The LED lights earlier improved using single phosphor failed to achieve this effect. "Pan Zhengwei said, there are two indicators to measure the quality of artificial light. Correlated color temperature is used to measure the well-being of the light. For indoor lighting, color temperature lower than the temperature of 4000K (Kelvin) is ideal and correlated color temperature higher than 5000K, the light will emit light blue luminescent like white LED t5 light fixture. Another important indicator is the color reproduction that is the ability of the light source to simulate natural light. Reduction degree reach more than 80 is ideal for indoor lighting, below this value the color will be very distortion.

The material developed by Pan Zhengwei and his colleagues meet these two conditions, correlated color temperature is controlled below 4000K and color reproduction reaches 85. Pan Zhengwei said coat the outer layer of blue LED chip with different colors phosphor is able to issue warm white light, which would then make phosphor-based white LED lights. However, these raw materials are laborious and cost money in accordance with the precise ratio, and eventually the light color will be different, because each raw material has not the same reaction to temperature change. One of the authors of the paper, Doctor Li Xufan, Engineering of the University of Georgia in Reading said: "Using single phosphor can solve the problem of instability in the light color, because single material does not change as the temperature rises."

The new material still needs to solve some problems before being applied in lighting

In order to develop new phosphors, Pan Zhengwei and his team selected europium oxide, aluminum oxide, barium oxide and graphite, each of which are taken to a small amount and mingled together. Then they put these powdery materials into a tube furnace and heat to 1450 degrees Celsius. The vacuum state in the furnace makes the vaporized material onto the chassis, and deposited as yellow light-emitting compound, and then put inside the bulb. Though research results are promising, Pan Zhengwei stressed that they need to resolve a few problems to apply this material in the lighting for homes, businesses and schools. The luminous efficiency of the new material is much lower than the light blue white LED lights. In addition, large-scale production will face challenges.

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