月份：2012年12月

To build the LED industry base in Jiangxi province

Riding the Nanchang development of LED industry, Ji’an city will speed up the pace for the development of LED industry steps.

Ji’an proposed around the construction of semiconductor lighting industry that gathering area Jinggang shan Economic and Technological Development Zone, Hedong Economic Development Zone,  Suichuan Country, Jiangangshan City Industrial Park, vigorously develop all kinds of LED lighting and LED video products to create “LED industry base in Jiangxi province.

To build the LED industry base in Jiangxi province

Gutai corridor is the only provincial electronic information industry base in Jiangxi Province. Ji’an adhere to the semiconductor lighting industry, including electronic information industry as a pillar industry to focus on fostering Jiangxi Province, the largest electronic information industry base. Ji’an industry express, until the end of last year, Ji’an electronic information enterprises amounted to 345, which specializes in semiconductor lighting products production enterprises up to 15 LED device packaging capacity ranks first.

It is understood that the one Linsen that rooted in Jinggan shan can produce more than 100 pieces, with an annual output of 50 million device package capability, in the low-end LED Flood Lights (semiconductor lighting) devices in the field of packaging capacity ranks first in the country; settled in Jishui County industrial Park Jiatai Electronics that specializes in the research and development, production, and sales of all kinds of LED side backlight, color night view display modules and other products. The entire project estimated to gain 600 million yuan annual year, which will bethe Jiangxi production back light largest enterprises.

Marketing developing

The industrial development is the market. If there is no market, and no order, the industrial development can not contribute too much.

It is understood that, previously, marketing of LED products in Jiangxi Province is mainly relying on their own, the main players is in the market of Jiangsu and Zhejiang and other places. However, with the expansion of the product yield, and increassed varieties, how to further expand the market willl be the decisive factor in  Jiangxi LED industry.

We believe that through the joint efforts of all parties, Jiangxi LED industry will be able to rose to the challenge in the fierce competition in the market, and embrace a better future for the sound and rapid development!

2012 Jiangxi LED industry development situation analysis

Jiangxi LED industry in recent years has achieved rapid development. And Fujian industrial has become the four largest clusters. Nanchang, Ji’an, Shangrao and other places in the LED industry, which is ushered in a period of rapid development. It is understood, Nanchang as China semiconductor lighting industrial bases. In the semiconductor lighting industry occupies an important position. The existing semiconductor lighting has 20. And in 2011, the main business income is 3.13 billion yuan. The initial formation of the High-tech Zone, as the two companies to Lattice Power Union Optical lead to the proliferation of the Jinxian countries and industrial parks, industrial structure, industrial development beginning to take shape.

2012 Jiangxi LED industry development situation analysis

Expected to 2015, Nanchang will nurture and develop more than two output value, which will exceed 30 billion yuan, with strong technical innovation ability, and leading enterprise in the country, formed a number of unique advantages, brand internationally competitive products, strive to achieve the output value of 300 billion yuan of the city’s LED and related industries. Until 2020, we will cultivate and develop a number of master core technologies, leading enterprises with international competitiveness, radiation and leading the LED industry of the province.

While the LED industry in Jian and Gaoan develop very fast. The following will be a comprehensive review. Jiangxi LED industry development.

Nanchang LED industry development takes shape

According to understanding, development of LED industry is the core of the important initiatives to create a Nanchang drives progress of Jiangxi province economy growth. After development, Nanchang as China’s semiconductor lighting industrial bases, semiconductor lighting emitting materials and devices in the country which already has apparent comparison advantages. The LED industry has become one of the industries of Nanchang city.

In the first half of 2012, Nanchang, more than 20 LED Panel enterprises realized main business income of 2.12 billion yuan. The initial formation of the High-tech Zone, as the two companies to Lattice Power Union Optical leads to the proliferation of the Jinxian counties and industrial parks, industrial structure, industrial development beginning to take shape.

To create the domestic first-class LED industry technology innovation and production base

The aim of Nanchang aspects, relying on the silicon substrate technology, advantage with completely independent intellectual property rights, vigorously build LED products export base, and will eventually be based on domestic, global and domestic first-class LED industry, technological innovation and production base in Nanchang playing.

Shenzhen big world debt of nearly 7 million, LED lighting suppliers petition to the government(1)

November 29, the weather is rain, Shenzhen gathered more than 100 suppliers in front of the Civil Center, holding “security – big horizons return my hard-earned money” banner, it is particularly striking. The presence of a packaged device suppliers said that they hope the city government come forward and give the supplier a word.

This reporter has learned that, Shenzhen vision Photoelectric Co., Ltd. (hereinafter referred to as the “horizons”) is a typical representative in one of the South China LED display industry. Industry sources said that, the 2011 horizons sales reached 3 billion, which belong to the LED lighting display industry. That is, in January 2011, the one who has always been good, and mergers and acquisitions of Security Technology (China) Co., Ltd. (hereinafter referred to as “CSST”) to acquire a 70% stake in the big vision.

Shenzhen big world debt of nearly 7 million, LED lighting suppliers petition to the government(1)

“At that time, when CSST shares directed to the LED concept heat. They hope to be able to put the big vision into the company’s overall package listing plan” One person said, before the CSST shares, big vision actually already stuck in the fund predicament.” And at that time, the company and CSST is signed agreement on gambling, but for the company, after all, it is a life-saving straw.

However, in recent years, the domestic  LED lighting display industry competition is intense with each passing day.

In 2012, the LED Tube display industry makes price war greatly. With a strength of the manufacturers hope to through the price war to eliminate a part of small scale manufacturer. The LED display screen which has entered the period of integration presents the situation of contention of a hundred schools of thought. But by the factor of slowdown, hair falling interest rates, LED display screen are difficult to have investment opportunities.

The High technology LED Industrial Research Institute (GLIT) released the latest display industry report, 2012 domestic LED display prices continue to fall, year-on-year decline in 15%-20%. At present, the main channel of the LED display manufacturer’s product gross margin level has been reduced to 10%-15%. Engineering channel product gross margin is still more than 20%.

At this time, big vision of “great leap forward” sales strategy, not only cannot play “self-help” effect, but let the company bogged down in the more serious capital predicament.

LED future enter into the civil area, electricity supplier platform as a springboard

Despite the global economic down turn in 2012, the mainland LED lighting and civilian market unpaired scale, but the LED industry remains growth of over 20%, mainly derived from intensive policy of the mainland government.

Mainland’s central government in 2011 had announced LED Development goals in the 12th Five-Year Plan. The LED lighting clearly point out: until 2015, LED Grow Lights enter into people’s lives. The Ming market penetration rate is 30%, incandescent will eliminated completely in 2015; followed in 2012, the mainland ministries has introduced different emphases LED future lighting development plan.

LED future enter into the civil area, electricity supplier platform as a springboard

Looking ahead to 2013, the policy continued, municipal project released a single, as well as subsidies terminal, it will help continue to drive the mainland of LED domestic demand market, escort the mainland for LED industry. And the duration implementation incandescent road map start on October 1, 2012, despite the current two, third-tier cities still have individual malls selling banned incandescent, but most businesses and incandescent lamp manufacturers have begun to transition into the sales and production of CCFL and LED lights. With the time over passed, the firm implementation of the continent out incandescent road map, the LED market space will increasingly broad.

Although civilian LED market has not yet demonstrated the huge demand, yet the continent’s huge population base, and improve the standard of living, increase awareness of energy conservation and recognition of high-tech products respected. So it indicates the enormous potential of the civilian market. In order to win the market, and the mainland many led future lighting manufacturers have also layout path. Most traditional lighting manufacturers choose to cut from the original traditional path the LED pathway, and the emerging LED manufacturers tend to be faster, more efficient, low-cost e-commerce platform. Topology believe that, with the perfection of the mainland e-commerce platform, the rapid increase of the number of users, the 2013 “electricity + LED” LED better way to enter the civilian market. Whether it is the emerging LED manufacturers or traditional lighting, manufacturers will do the electronic business in the platform.

Continental panel industry giant BOE recently said that with the commencement of the Beijing BOE 8.5 generation production line and the Hefei 8.5-generation line, the future of LED back light module demand with panel production carve out and supporting growth BOE hope through shares before there is co-operation between the East Bay, Formosa on quality LED manufacturers to enter the field of LED back light. However, for central enterprises to stake in Taiwan enterprises is difficult.

Analysis of LED fluorescent tubes

LED connection mode (series/parallel) and wide voltage range: in order to enable LED fluorescent tubes work under wide voltage range: 85VAC-265VAC, the connection mode (series/parallel) of LED tubes is fairly important. Current power supplies generally use non-isolated step-down power supply. In wide voltage requirements, the maximum output voltage should be no more than 72VAC, the input voltage range is 85VAC-265VAC. In other words, the series string number should be less than 23. Also need to limit the number of parallel strings. Too much current will generate more heat. Normally, 6/8/12 branches with the total current less than 240mA.

 

ED connection mode (series/parallel) and wide voltage range: in order to enable LED fluorescent tubes work under wide voltage range:

 

Relations between LED Tunnel Light series-parallel connection and PFC power factor, wide voltage range: there are three major cases of PFC power supplies in the market: a. without PFC special circuit, the PFC is normally about 0.65; b. with passive PFC circuit, the PFC is normally around 0.92; c. with active source 7527/6561 circuit, PFC can reach up to 0.99. But this case is twice as expensive as the second one. Comprehensively, b is the most commonly used mode.

 

Precision of constant current: some constant current sources in the market have a relatively low precision, like the popular PT4107/HV9910/BP2808/SMD802 constant current plans with an error of +/- 8% or +/- 10%. In normal condition, +/- 3% is enough. In this way, 6 branches with error +/- 0.5% for each branch, or 12 branches with error +/- 0.25 for each branch can meet such requirements. High precision will also increase the production cost of LED fluorescent tubes. But for LED lamps, 17mA or 17.5mA does not make too many differences.

 

Isolated/non-isolated: generally, isolated power supplies can make as 15W. LED drivers are too large to be embedded into LED tubes with limited size. Thus isolated power supplies can only be made as 15W tops, hardly find power supplies in the market with output power greater than 15W. In terms of LED tubes, isolated drivers have very low cost-effective. Non-isolated driver is the mainstream.

 

Power efficiency: the ratio of output power to input power. This parameter is very important. Low power efficiency means that most of the input power is converted into thermal energy and wasted. Such drivers will generate a large amount of heat within tubes. LED is a type of component that vulnerable to heat. Thus LED lighting fixtures need high power efficiency, normally no less than 80%.

Five selection points of LED fluorescent lamps

Currently, LED fluorescent lamps market is very active. Manufacturers can be divided into three types: a. original LED chip manufacturers, started to penetrate to downstream packaging and application business, having little knowledge in circuit and power supply; b. ordinal general lighting application manufactures, entering a new field, having little knowledge in circuit; c. new comers, they just started their new venture in the field of LED lighting business, having no knowledge in LED power supply. LED power supply (LED driver) is the most important part of LED fluorescent lamps. Improper selection of LED drivers will reduce the performance of LED tubes or even disable the normal work of them.

 

Currently, LED fluorescent lamps market is very active. Manufacturers can be divided into three types:

Why must be a constant current: characteristics of LED semiconductors seriously influenced by the environment: LED current will increase with the raise of temperature and input voltage. Working under over-rated current for a long time, the service life of LEDs will be declined drastically. Constant current can fix the internal working current in diverse temperatures and voltages.

The match between LED fluorescent lamps and lighting boards: some customers are accustomed to design lighting boards before finding matched power supplies. It is rather difficult: too much current Vs too small voltage (I>350mA, V<40V); otherwise too much voltage Vs too small current (I<40mA, V>180V), leading to a result of over-heated, low efficiency, insufficient input voltage range. The best solution is to choose an optimal connection mode (series/parallel), making current/voltage on each LED chip remain the same. By doing so, LED power supplies can get the best performance.

The operation current: the general LED rated operating current is 20mA. Some makers would set the initial current as 20mA. In fact, working under such current, LED Tunnel Light chips will generate a large amount of heat. After numerous comparison tests, 17mA is an ideal value. The total current of N-way parallel branches is 17*N.

The operation voltage: generally, the suggested operation voltage of LED chips is 3-3.5V. According to measurements, most of LED chips will work under 3.125V voltage, which has been proved a relative ideal value. The total voltage of M-way series branches is 3.125*M.

Dimensions: height is the main restriction factor. LED chips used for LED T6/T8 tubes should have a height no more than 9 mm, and no more than 15 mm for T10 tubes. Long in length can help to conduct heat.

Literacy of 3528 SMD LED soft strips

3528 SMD LED soft strips are a type of commonly used decorative lighting application that use LED as light source, FPC circuit board as carrier, series connected with current limiting resistors. They have following advantages: high brightness, soft and bendable, can be cut into length that wanted.

 

3528 SMD LED soft strips are a type of commonly used decorative lighting application that use LED as light source, FPC circuit board as carrier, series connected with current limiting resistors.

 

The light source of 3528 SMD LED soft strips is 3528 LED chips, using soft FPC board as carrier, namely flexible printed circuit board. The general width of this board is 8mm, thickness is no more than 1mm. Two or several FPC boards can be weldingly connected together. Finished 3528 LED soft strips with length of 5M (per roll), carried by anti-static discs and anti-static bags , easy to transport.

 

3528 SMD LED soft strips can be divided from the following aspects:

  1. Color: colors for FPC board are yellow, white and black; colors for LED lamps are white, warm white, red, yellow, blue, green and purple.
  2. Waterproof grade: LED strips can be used in different positions. Thus the waterproof grade can be divided into non-waterproof, epoxy waterproof and casing waterproof.
  3. Lamp beads: FPC can be attached with many 3528 LED Tunnel Light  chips. There are three regular specifications: 30 units per meter; 60 units per meter; 120 units per meter, applying to places with different brightness requirements.

 

3528 SMD LED soft strips can be used in widely places, product showcase, storefront decoration, super-thin light boxes backlight, hotel/KTV decoration, outdoor lighting applications, home ceiling lights, ceiling entrance decoration.

 

By using 3528 SMD LED chips, 3528 LED strips have high brightness, low power, long service life, easy to install, flexible in customization, easy to transport, energy-saving, environmental friendly.

 

The input voltage of 3528 SMD LED strips is 12VDC, must be equipped with 12VDC switching power supplies. After calculating the connection length and output power of each strip, engineers need to equip a power supply (20% higher than rated power). The best suggestion is: the length of each LED strip is 4 meters, a group of DC output lines from the switching power supply. 3528 SMD LED soft strips will generate heat automatically at work. So they cannot be installed in places with temperature. Normally should less than 50 centigrade.

Japan has developed a new type of OLED chip with 100% internal quantum efficiency

Recently, Japan’s largest organic Optoelectronics Research Center (OPERA) from Kyushu University announced the development of a new type of OLED chip with 100% internal quantum efficiency. Previous materials with high internal quantum efficiency are limited to those phosphorescent materials using rare metals. OPERA named this material as “Hyper-fluorescence”.

 

Japan has developed a new type of OLED chip with 100% internal quantum efficiency

 

OLED light-emitting materials can be divided into fluorescent material and phosphorescent material based on different light-emitting principles. Fluorescent material can combine (emit light) when excitons in a doublet spin state. In addition to a doublet spin state, phosphorescent material can realize light emitting also through a triplet spin state. Normally, the double spin state and triplet spin state occurs in the ratio of 1:3. Thus, the maximum quantum efficiency of fluorescent materials is about 25% and the maximum phosphorescent materials can reach up to 100%. In the fluorescent materials, the energy of triplet excitons generally cannot be converted to optical energy (light emitting) but lost as heat.

 

This phenomenon is obvious in OLED components with different luminous efficiencies. Thus in the development of OLED display and latterly LED Tunnel Light lighting applications, the utilization of phosphorescent materials increased continuously. OLED chip with a luminous efficiency of 50% can be achieved by using phosphorescent materials, as well as blue light-emitting materials. But phosphorescent materials still have a number of issues need to be solved: a. phosphorescent materials contain rare metals, which are very expensive; b. Universal Display technology (UDC) controls most of related patents; c. blue phosphorescent materials have relatively short service life, not practical.

 

In recent years, scientists found several materials with internal quantum efficiency of more than 25%, in spite that they all belong to fluorescent materials. Andaman Research Office of OPERA is very concerned about this phenomenon, launching a series of studies to materials that can help to improve the luminous efficiency and naming one of the light-emitting principles as “thermal activity delayed fluorescence” (TADF).

 

TADF can send out light only when excitons in the doublet spin state. Based on this feature, they belong to fluorescent materials. But after heating, the triplet excitons will transform into doublet state. Thus it is possible for all excitons in this kind of materials emit light during the combination. Andaman Research Office has strengthened the study effort of OLED chip with 100% internal quantum efficiency.

ERG launches new LED driver board

New SFDK series are a type of highly efficient dual-output LED driver board, with connectors on both sides of PCB. They applied cost-effective plug-and-play program, which can supply electricity to 22-inch LCD TV sets using LED backlight technology. SFDK also provide FPC (the tablet compatible) plug. Interface between driver and panel can be achieved by single-core 0.5 mm flat cable (FFC). Different displays use different core cables (6/8/10/12). The maximum output current is 320mA, can drive up to eight LED strings, four on each side.

 

New SFDK series are a type of highly efficient dual-output LED driver board, with connectors on both sides of PCB.

 

As new LED driver board, SFDK is very compact, with height of just 8mm, length and width of 4.59 inches (116.5mm) and 1.15 inches (29.2mm) respectively. Compatible with a variety of OEM LED backlit panels over a wide input voltage (10-20V, 5V version) range, having stable light output, external PWM dimming can achieve 500:1.

 

SFD2E LED driver produced by ERG is a new version of compact SFDE driver (E presents economic type), realizing high power output through compact circuits. This driver is suitable for LCDs (10.4 inches to 24 inches) with high power high brightness LED backlight technology. 480mA maximum current output can drive up to eight LED strings. SFD2E LED Tunnel Light driver has following features: wide input voltage (8-20V), external PWM can achieve 500:1 dimming, and 255:1 dimming on the board. The general dimension of SFD2E is: 1.115 inches (28.32mm) wide, 4.585 inches (116.5mm) long, and with height less than 10mm. The J12 output connector (FFC/FPC compatible) makes SFD2E compatible with many OEM LCD panels.

 

Both SFDK and SFD2E LED driver board are designed and produced in the United States, technically supported by the United States, also, with one year warranty. The selling price of SFDK and SFD2E is 20USD.

 

In the condition of increasingly imbalanced electricity demand and electricity production, the most effective way is to improve the light efficiency, providing more brightness by consuming less energy. Energy utilization involves many areas. Take common home and building electricity consuming for example: according to related statistics, about 30% home and building electricity consuming is from lighting applications in the United States, about 11%-12% in China. It can be seen that saving energy in the lighting area can bring huge benefits.

LED packaging technology still needs to be improved

Technically, the luminous efficiency of LED chips is a key factor to improve the development of LED applications. According to Mr. Mantie Lee, the general manager of Shenzhen Ledman Optoelectronic Technology Co., Ltd., the luminous efficiency of LED chips was continuously increasing recently. The light efficiency of 1W high-power LED chips available in the market has reached up to 100lm/W.

 

Technically, the luminous efficiency of LED chips is a key factor to improve the development of LED applications.

 

The LED packaging technology is another important factor. Although their effects on improving luminous efficiency are not obvious, they have closed relations with the reliability of LEDs. Differences in LED packaging technology have direct impacts on the LED quality. Good packaging and cooling design enable LED chips work under 60 centigrade, the lifetime of which can be more than 50,000 hours. On the contrary, weak packaging will cut the lifetime of LEDs by half or more. 90% luminous efficiency of LED lamps is determined by the luminous efficiency of LED Tunnel Light chips. Another 10% is determined by packaging structure and phosphor excitation efficiency. 30% of the reliability of LED lighting fixtures depends on LED chips and another 70% depends on packaging materials, packaging structures and packaging management. 50% cooling effects of LED lamps is determined by package heat dissipation structure and materials.

 

Packaging technology is especially important to LED lighting industry. Currently, the luminous efficiency of some highly efficient LED road lamps has been more than 80lm/W, contributed by the improvement of LED chips’ luminous efficiency. These road lighting devices have obvious advantages in energy-saving, the reliability and service life of which still rely on the further improvement of packaging technology. The current bottleneck of LED street lighting technology is light attenuation and reliability rather than luminous efficiency. Using high-powered LED packaging technology can significantly improve the light attenuation and reliability of LED road lamps.

 

For road lamps, packaging has very limited effects on improving their luminous efficiency. They rely more on the improvement of LED chip technology, while stability, reliability and consistency more rely on production process. All LED street lighting applications are volume applications. Series-parallel technology is needed regardless of the scale of programs. There are hundreds of components used in one LED street lamp. Any failures of these units will put an impact on the original design of the current and voltage threshold, and consequently the working condition of the whole lamp.