作者：Blade

Introduction of the main components of LED panels

Different from other LED lights applications, such as LED tubes, LED bulbs, LED panels did not follow the traditional appearance design. In fact, they are derivatives from LED backlighting technology. Pushing the boundaries of traditional design concept made LED panel lights fully develop their own advantages and wide spread all over the world.

 

LED panels can emit even rays, no glares, more delicate structures, very popular in offices, hospitals, luxury hotels and some other high-end leisure and entertainment. Their elegant appearances made them the No.1 for lighitng designers or interior designers. This article will give a small talk about the basic construction of LED panels.

 Different from other LED lighting applications, such as LED tubes, LED bulbs, LED panels did not follow the traditional appearance design.

Aluminum frames:

Aluminum frames are the main cooing sections for LED panel lights, simple but elegant. The most commonly used model for panel frames is ZY0907, which costs much less in metal mold and stamping. The die-casting aluminum frames can be designed into different IP levels (IP67 tops).

 

LED lighting sources:

The normally used LED chips for LED panel lights are 3528 (35mm x 28mm), 3014, and 5060. Here panel manufacturers have to do some tradeoff. 3014 and 5060 are relatively cheap but with poor lighting efficiency. Most of manufacturers prefer to use 3528, not for a good lighting efficiency but the designs of light grids is much easier for them compare with 3014 and 5060.

 

LED light guide plate (LGP):

LGP is a key design point for LED panels. The working principle is guiding the light (generated by side mounted LED chips) thought the LGP evenly. A poorly-designed LGP will cause an uneven light distribution. Most of the light will concentrate on the center while other areas are much darker. Even worse, the entire panel presents bright-and-mark streaks, which is very ugly. In order to increase the lighting efficiency, designers should create a competent LGP. The next factor needed to be considerate is plate quality. However, designers would not pay much attention on this part, since the luminousness of different plates only impacts very tiny influences on total effects. Generally, small sized LED companies prefer to use finished plates from other factories rather than design and produce their own LGPs. By doing so, they can save a large amount of money.


Zimbabwe plan to introduce LED street lighting technology

Recently, Zimbabwe was focused on a new plan: gradually introduce LED street lighting technology all over the country in next two decades. On 5th July 2012, Mr. Cllr Amen Mpofu, the Vice Mayor of Harare, announced that landscape lamps on main streets will be replaced by advanced LED lighting technology during 2012. In his words, this will be a new milestone for the capital city and even for Zimbabwe. Mr. Cllr Amen Mpofu also indicated that this project will be spread through the entire country and the estimated energy saving will be approximately 80%. “LED is the most advanced lighting technology at the moment. Our scientists have made a complete set of tests and proved that it really save a large amount of energy compare with other traditional lights, even sodium lamps and halide lamps. We can save a lot of money by installing LED street lights. We decided to put this money into public issues to enhance the government facilities to serve our people better. ”

 Recently, Zimbabwe was focused on a new plan: gradually introduce LED street lighting technology all over the country in next two decades.

In a later interview, Mr. Mpofu introduced the main steps of this project and discussed about the social economic benefit and environmental benefit brought by it. As mentioned before, the implement of this place will save nearly 80% electrical energy. According to a recent poll in Zimbabwe, more than 80% residents expressed their support for this project. “It went beyond my expectation, I thought previously less than 50% citizens would agree with this plan. But the results came out so good. It suggested that our environmental protection consciousness has been strengthened. ”

 

Zimbabwe Development Democracy Trust published a research report at the end of last month, giving out a series of experiment results and conclusions. In this report experts estimated that if LED street lighting technology were be used all over the country, the Zimbabwe Government would save 1.8 million dollars per year in electrical costs and maintenance costs. This was a conservative estimate, without considering the costs caused by environmental protection. Since LED lighting products generate much less human-hazard substances, people have no need to spend a large amount of money to depose with them during their operation. Although the aluminum alloy used as the main body of LED lighting products may cause damage to the earth, it is much better than other traditional lamps do.


The first chapter: LED and OLED lighting: only in the necessary places to use the necessary amount of affordable lighting

With the energy-saving development to replace incandescent bulbs and fluorescent lighting, LED lights, OLED the popularity of the shape of freedom increasingly been looking forward to. Only the necessary amount of LEDs used where necessary, the use of OLED all face directly luminescence, etc., and a variety of usage increasing possibility.

The first chapter: LED and OLED lighting: only in the necessary places to use the necessary amount of affordable lighting

Starting from the energy point of view, the use and production of incandescent bulbs as lighting the main is less and less. In Japan, the Ministry of the Environment and the Ministry of Economy has asked industry to stop production and sale of incandescent light bulbs by 2012, major companies have to comply with this requirement.

As an alternative light source, LED(Light Emitting Diode: LED) technology achieve rapid development. High luminescence efficiency, LED flood lights as “a new generation of lighting” has become the trump card of the energy-saving from the high cost of active use. With prices constantly going down, the LED will no doubt become a mainstream light source in the future.

Not only in Japan, the development of the affordable lighting in the world is also accelerating. The Case of Korea, the country is carried out in 2015, LED lighting accounts for 30% of the lighting plan. The United States and China and other countries are also promoting LED lighting investment.

As the next stage in the same state of the style LED lighting to replace the trend of the straight fluorescent lamps. Most lighting companies are currently in development and sales for the substitution of straight-tube fluorescent products.

LED lighting is for the purpose of energy saving at the same time, LED of affordable lighting can also have the effect which is not limited to substitute the original source. Bears the potential of the life and work of human change and lighting to get along the way.

This is mainly because that the use of LED street lights can achieve a high degree of freedom of lighting dimming and color.

For example, LED lighting is theoretically capable of fluorescent difficult to achieve the range of 0-100% dimming. Although fluorescent lamps can support the dimming of the products, yet it can not control the type from 0%. Moreover,  the light will shorten the luminescence life time as the existence of a low amount.

Vietnam LED market has great potential

Ho Chi Minh City has recently issued an investment certification to Kim Dinh (Vietnam) and Fawoo Technology (Korea), allowing them to establish LED lights (for residential and industrial purpose) production base in the High-Tech Park. This was a first co-operation between Kim Dinh and Fawoo Technology and cost them about 1.23 million dollars. They believed that Vietnam LED market has great potential.

 

SHTP indicated that this joint venture belonged to new energy industry, in line with the new energy industry development policy issued by Vietnamese government. In the beginning of 2011, SHTP accepted 4 new energy investments (7.76 million dollars in total), including HPT, Amvi biotech, and Vietnam Oil and Gas RD led street lights Centre.

Ho Chi Minh City has recently issued an investment certification to Kim Dinh (Vietnam) and Fawoo Technology (Korea), allowing them to establish LED (for residential and industrial purpose) production base in the High-Tech Park.

Ho Chi Minh City now has nearly 110,000 public lighting bulbs and around 110,000 bulbs for residential use. From the very beginning of 2011, Vietnamese government started to replace all old traditional public lighting instruments and installed new electronic ballasts, which can save more energy. Even so, Vietnamese government still paid an electric bill of 120 billion VND (Vietnamese Dong) and another 25 billion VND for maintenance fees. Government decided when VEEPL finished at the end of 2011, Vietnam Ministry of Industry and Commerce will continue to implement plan to replace core wire bulbs with high-performance lamps (this plan is also funded by GEF). It is expected that after 2014, the utilization of LED lamps in Vietnam will be more than 50%. Economic experts felt confident about Vietnam LED market.

 

Urbanization, urban infrastructure, rapid construction and development prompted a huge demand of lighting products. Vietnam’s urbanization rate was expected to increase from 27% to 45.2% by 2020. The implementation of urbanization and the rapid development of economy have greatly stimulated the demand for lighting products, both indoors and outdoors. Vietnam lighting market has entered a golden age.

 

In the next 10 years, Vietnam will invest over 60 billion U.S. dollars in the construction of roads, airports, ports and other public transport network. The Vietnamese Government has approved an urban renewal plan. By 2020, the total investment amount will reach up to 90 billion dollars in reconstruction of old urban. Also, in commercial areas, in hotel/resort industry and leisure entertainment, the Vietnamese Government prepared development plans.

 

All signs pointed out that in the next decade, Vietnam LED market will explode.


All LED are a minimum impact on the environment of energy efficient lighting

The new report of US Department of Energy(DOE) points out that LED lighting is significant in that incandescent bulb compared to the lower impact on the environment and the slight super-fluorescent lamps(CFLs). LED manufacturing and utility”in this report compare the life cycle of these three different bulbs including production, operation and eliminated. This report is a comprehensive study and analysis of three different bulb products: assembly, transportation and elimination on the energy and the environment. This is also the first open discussion of the report of all LED production process to support the Department of Energy to protect the public air and water, and to improve the competitiveness of US clean energy, and to assist the family and line number to save the costs of energy bills.

All LED are a minimum impact on the environment of energy efficient lighting

This is the second report of the Department of Energy assessment compared with the traditional light bulbs. The life cycle cost of environmental resources.

This report follows the previous report, which is published in February 2012″ “Review of the Life cycle Energy Consumption of Incandescent, Compact Fluorescent and LED Lamps” conclusions, and compare three different lighting sources wide-ranging implications on the environment.

The report points that the traditional fluorescent lamps(CFLs) and all LED lights are very similar in terms of energy consumption, both energy consumption are less than incandescent bulbs, and consumed compared to manufacturing and transportation, running most of the life cycle-energy. Because of the high efficiency of the running, consuming 12.5 watts of electricity and can be achieved and CFLs (15 watts) and incandescent bulbs (60 watts), the efficacy. 15 test report 14 shows the LED bulbs are three lighting among the most environmentally friendly lamps.

In addition to the dominant disposal, all aspects of testing existed. Compared to  LED bulbs, the impact on CFLs is larger than environment. The landfill would be after the LED inside the aluminum alloy material precipitation will cause great harm, The DOE report noted that, based on short-term improvement impact in the next five years,all LED on the environment impact of today is quite small.

When market-oriented wants to save money for the customers and company, the incandescent light bulb change to use to save energy in lighting. We can estimate that LED lights and CFLs impact on the environment reduce today’s 3 to 10 times.

International LED enterprises intend to build their factories in China

Since China’s accession into WTO, foreign investment transformed from exemplary joins into strategic development in many industries, including LED lighting industry.

 

Firstly, we need to comprehend the purposes of these international LED enterprises’ continuous establishing factories in Mainland. Obviously, cost will be the most essential reason. Because of the tremendous manpower advantage, China has always been the favorite in manufacturing industry all over the world. As a manufacturing, LED lights need much more manpower compared with other industries. Although the invention of automatic production line may reduce pressure to some degree, the entire production process still required a large amount of human label. Cheap Chinese labor kept these international LED enterprises low costs. Besides, foreign investors also took the complete and convenient transportation system into account. Another reason is the market advantage. There is no doubt that China will become the biggest market for LED lighting industry in the future. Building production base in Mainland can speed up the feedback between customers and manufacturers, which is really essential to establish the brand influence.

Since China’s accession into WTO, foreign investment transformed from exemplary joins into strategic development in many industries, including LED lighting industry.

Secondly, we need to analyze the merits and demerits of domestic and international LED tubes manufacturers. Generally, international LED enterprises are more powerful in research and development area. More than 80% LED chips came from foreign LED companies in spite that more than 80% LED lighting factories are in China. Obviously, foreign companies have advanced technology while our domestic companies only can provide label.

 

Once we figure these problems out, comprehensively understanding the not-really-complicated lines under the superficial phenomenon, we could easily come up with solutions. However, the premise is we know which way is right to follow.

 

Unboubtly, technology improvement is the primary step. In order to increase the international competitions, we should have our own LED chips. Fortunately, China’s top 5 LED enterprises have transmitted their attention on this part, starting their research and development in intelligent LED lighting products area and LED chips area. Our LED manufacturers also need to put a premium on management to improve products qualities. Surely we must clear that simply competing in low-quality application market will keep our competitiveness in low levels. As a matter of fact, most of our LED lighting products are much cheaper than foreign products, but still lacking of popularity in high-end markets. These are problems cannot be solved only relied on low prices.


The Climate Group called on countries to accelerate towards low carbon commercial led lighting

In the recently concluded United Nations Conference on Sustainable Development, the Climate Group released an independent global technical test results, LED lights can save up to 85% of energy. The trial also found that the pilot of urban residents prefer LED lighting and believe that its social and environmental benefits. CEO MarkKenber of the Climate Group, said: “This report clearly shows that LED technology has been with the conditions of a wide range of applications in various towns around the world, we call on governments to remove policy barriers and accelerate the transition to a low carbon commercial led lighting.

The Climate Group called on countries to accelerate towards low carbon commercial led lighting

This independent test of the LED lighting project for a period of two and a half years, 15 tests were carried out in 12 cities around the world in New York, London, Calcutta, Sydney and Hong Kong. The test conclusions by “light clean revolution” the rise of the LED road lighting and led street lights its significance for the city’s report was first released.

The report analyzes the status of the global lighting market, as well as the prospects for the development of LED technology. For those seeking to upgrade and for large-scale LED retrofit projects for financing policy makers and urban commercial led lighting managers, the reports provide a detailed reference.

The concept of “clean revolution” movement advocated by the Rio +20 summit as where part of the Philips report by The Climate Group join hands together to complete, which is to practice “clean revolution”-a relatively small cost savings in a relatively short time.

According to statistics, 19% of the electricity used for lighting, and 6 percent of global greenhouse gas emissions from the lighting. If you double improved efficiency of the global greenhouse, the influence is equal to reduce half of the energy and electricity and heat production of greenhouse gas emissions. The same with other energy-saving technologies, energy efficient lighting will promote global prosperity. Only in the United States, the field of lighting energy demand, which is equivalent to the generating capacity of 198 medium-sized power stations.

The Climate Groups and Philips called for the establishment and implementation of an international low-carbon commercial led lighting standards, and to ensure that the world has the opportunity to enjoy the energy-efficient outdoor lighting.

stealth led grow light reviews for solar use

With the development and progress of solar photovoltaic technology, solar cells as a new energy, first applied in the civilian aspects of the lighting, solar lighting products due to environmental protection and energy saving dual advantage. The solar LED lighting products is the next generation of green lighting products, and its main components, including solar photovoltaic cells (PV) and semiconductor lighting (LEDs). LED solar lights integrated solar photovoltaic and LED solid state lighting the advantages of solar LED lighting systems to achieve the perfect combination of a new generation of energy and a new light. However, in the design of solar lighting, involving light, solar battery systems, battery charge and discharge control of a number of factors, any part of a problem will result in product defects.

stealth led grow light reviews for solar use

A first look at solar lighting composed of:
The key lies in solar photovoltaic technology and LED lighting (stealth led grow light reviews) a perfect combination of both direct current, low voltage and can be matched. The combination of the two do not need the solar cells produce direct current into alternating current, thus greatly improving the efficiency of the entire lighting system. The same time, by means of network technology or the use of battery charge and discharge energy, to make it more obvious advantages.
1, solar panels
2, the charge and discharge controller
3, the battery
4, the load
5, shell lamps

Second, the design used must be noted: (LED lawn lamps  (stealth led grow light reviews) , for example)

LED characteristics close to the Zener diode, the work of change in voltage 0,1 V, operating current of may change 20mA or so. For security, under ordinary circumstances, using a series current limiting resistor, a great deal of energy loss is clearly not suitable for solar lawn lamp, and LED brightness changes with the operating voltage. The boost circuit is a good way, you can also use a simple constant current circuit, in short, must be automatic current limiting, otherwise will damage the LED lights.

2, the peak current of the general LED 50 100mA, reverse voltage of about 6V, careful not to exceed this limit, especially in the reverse polarity of solar battery or battery no-load, high peak voltage boost circuit is likely to exceed this limit, damage LED (stealth led grow light reviews) .

3, LED temperature characteristic is not good, the temperature rises 5 ° C decreased by 3% luminous flux, summer should pay attention to.

The operating voltage discrete, the same model, same batch of LED street lights operating voltage has some differences, and should not be used in parallel. Must be used in parallel, you should consider are flow.

 

stealth led grow lights and led drivers

LED digital tube display use the drive circuit to drive the digital tube segment, which shows what we want, therefore, according to the different ways on the drive LED digital tube can be divided into static and dynamic categories .

stealth led grow lights and led drivers

A, static display driver:
Static drive, also known as the DC drive. Static drive means to each tube for each segment of code consists of a microcontroller I / O ports to drive, or use, such as BCD code – decimal decoder decoding to drive. The advantages of the static drive is programmed, the display brightness, the drawback is that takes up I / O ports and more, such as driving the 5 digit tube (stealth led grow lights)  static display, 5 × 8 = 40 I / O port to drive, be aware that a 89S51 microcontroller available the I / O port 32. Must be increased so the practical application of the decode drive to drive, increasing the complexity of the hardware circuit.

B, dynamic display driver:
Digital dynamic display interface is one of the most widely used microcontroller, a display, dynamic driving the all digital tube  (stealth led grow lights)  8 shows the stroke “a, b, c, d, e, f, g, dp” with the same name connected together, the other to increase the bit strobe control circuit for each of the tube very COM-bit strobe controlled by a separate I / O lines, when the microcontroller output glyph code, all digital tube received the same font code, but what is the digital tube will display the shape, depending on the control of the microcontroller strobe bit COM terminal circuit, so we just need to display digital tube strobe control open, the bit on the show the glyph, there is no digital strobe tube will not light.

Through time-sharing in turn control the COM side of each LED digital tube, so that in turn controlled display various digital tube, which is dynamically driven. In the rotation display process, per bit digital tube light time of 2ms, the human visual persistence of the phenomenon and the light-emitting diode (stealth led grow lights) afterglow effect, despite the fact that you number the pipe is not lit, but as long as the sweep The aim of speed is fast enough to create the impression that a stable set of display data, there will be no light flashes, the effect of dynamic display and static display is the same, can save a lot of I / O port, and lower power consumption.

Constant current driver with constant current driver on the LED digital tube is mainly the following:

1, showing the effect:
LED tube is basically a current sensitive components, the dispersion of the forward voltage drop large, and also with the temperature, you need to make it a constant current in order to ensure digital pipe has good brightness uniformity, and can not be temperature and other factors. In addition, when the temperature changes when the driver chips also can automatically adjust the size of the output current in order to achieve the temperature compensation of the color balance.
2, security:
Even short-term current overload may also cause permanent damage to the LED lights, digital tube, constant current drive circuit to prevent current fault extensive damage.
In addition, the Commission adopted VLSI characteristics of cascading delay switch to prevent reverse voltage spike damage on the light-emitting diode. VLSI also has thermal protection which automatically shuts down when any one temperature exceeds a certain value, fault indication and can be seen in the control room.

street solar lighting in LED machine

The jetting, belongs to the new led lights technology, which uses a nozzle alternative to syringes, to solve many problems. Jetting nozzles needed to fill the bottom of the device above the dispensing need to reach their location below the top (street solar lighting). Jetting nozzles in the entire circuit board side along the x and y directions, without the need for vertical movement.

street solar lighting in LED machine

And dispensing syringe, the nozzle does not form a continuous bottom-filling glue flow, and replaced every second jet more than 200 points after accurate measurement of the gel-point. With the move of the nozzle level, the gel-point can be the formation of linear and pattern of a variety of needs, the solid line, dotted line and a variety of other different graphics. Each jet by precise control of a jet formed by the gel-point minimum diameter of up to 0.33mm, for coating plastic patch area into the precise control of occasions is very important.

 

Injection technology is the glue from the nozzle at a faster rate, rely on glue momentum to make glue out of the nozzle. Each jet  (street solar lighting) will spray out a certain amount of glue. Common injection frequency is 100 Hz to 200 Hz, but will soon reach 1000hz. , There are several different jet dispensing needle dispensing. When the glue from the nozzle, before the glue in contact with the substrate and the separation nozzle. Each of the gel-point injection into the substrate to form points, lines, and graphics. In the dispensing position during the move, the dispensing head is not the movement of the Z-axis direction, thus saving a considerable amount of time. Needle dispensing robot in the X, Y, Z axis movement, glue flow from the needle out of contact with the substrate, relying on gravity and the substrate surface tension glue isolated from the needles. After the completion of each dispensing, a movement along the Z axis, and then move to the next dispensing position.

The LED products market is also benefiting from the spray adhesive technology. Spray adhesive process can spray a wide range of optical materials including silicone, UV curable conductive adhesive of the phosphorus doped in the high-speed dispensing position and precise dispensing and plastic volume control. The accuracy of the spray adhesive can improve the yield of high-value high-power LED street lights devices. Applied to the white light  (street solar lighting) production, phosphor powder and mixed glue dispensing, its consistency is a good improvement.