作者：Blade

Low-cost LED lights serve for ordinary people

 

Low-cost LED lights serve for ordinary people

 

Virginia Tech University electrical engineering Ph.D, China Gui Chao said, returning scientists in the future, let the Low-cost LED lights into the homes of ordinary people.

 

LED lights are mainly used in the public block, 10 to 12 hours of local roads, shopping malls, supermarkets, cinemas and other daily illumination time basic. In these areas, energy conservation is necessary.

 

Two years ago, the Wu Lin Yintai shop, to replace all the LED lights, energy-saving effect is very obvious. Previously, the average annual electricity bill of the Wu Lin Yintai shop is 400 to 500 million, the transformation LED fire pans about the $ 1.5 million, but because LED Lantern Festival energy up to 50% to 60% a year can save more than 2 million yuan electricity, then leveled the investment in LED lights.

 

, LED lamps, high brightness, soft light, ultraviolet, more importantly, the heat generated by 2-3 ℃ lower than the general lighting because the lighting produces heat, Wu Lin Yintai stores a year to open 10 air conditioning, replaced all the led high bay lights, air-conditioning opening 8 on.

 

Hangzhou hotels are also fans of the LED lights. Zhejiang Hotel to replace the LED lights, the annual electricity savings of 900,000 yuan.

 

Inventronics chairman of the State “Thousand Talents Program” selected by China Gui tide has calculated that an account: a 40-watt incandescent light, 15-watt energy-saving lamps can achieve, if replaced with LED lights, you can simply 5 watts on the line. Reflected in electricity, 28.5% of a household fluorescent lamps and Low-cost LED lights, at the same brightness, LED fluorescent lamp power consumption is only fluorescent.

Car led lighting are enjoying a Liu Xiang style development

 

Car led lighting are enjoying a Liu Xiang style development

 

China’s Ministry of Finance, Industry and Information Technology, General Administration of Customs and the State Administration of Taxation jointly issued a notice on the adjustment of the major technologies and equipment import tax policy directory, clear the latest revision of this year, the state supports the development of major technical equipment and products Catalog “and” major key components of the car led lighting, raw materials, list of goods “will be implemented from April 1, 2012, domestic enterprises who meet the specified conditions listed in the production of the new directory technology equipment and products import a list of related parts and raw materials, goods, customs duties and import VAT. The adjustment has a positive significance of the two. First, the gradual adjustment of the whole tax policy of the major technologies and equipment for tax exemptions on imported key components, which is conducive to the realization of the import substitution of the major technologies and equipment; is included in major emerging industry for some yet to be developed but the lack of core technology and key equipment directory of the technology and equipment tax policy, contribute to the adjustment of industrial structure, to achieve the rapid development of new energy, high-end equipment, and other emerging industries.

 

Make the domestic LED Enterprise excited state-subsidized policies, the car led lighting industry to benefit significantly, according to the Ministry of Finance, National Development and Reform Commission and the promotion of efficient lighting products, financial subsidies fund management Interim Measures “requirements, in order to encourage LED products promotion of demonstration applications, and further promote green lighting project and energy savings, and guide the healthy and orderly development of the semiconductor led high bay lighting industry.

The development of LED intelligent lighting is just before the dawn

 

The development of LED intelligent lighting is just before the dawn

 

Xu Chen told LED inside “reporter, intelligent lighting concept are mainly two: First, through the sensor, changing the light, light to adapt to people; is light as a transmission medium, and one as acceptor. Intelligent lighting is not just change the luminous body, but a variety of modern technology, communications, sensing, cloud computing, Internet of Things into one to achieve the effect of light is not only light.

 

LEDinside reporter has learned, some domestic enterprises have been somewhat on the concept of smart sensors, multimedia LED intelligent lighting layout. It is reported that the ground on the optical has the combination of sensor and LED lights up, use the phone you can directly control the lighting; Xi’an China has security systems into the led high bay lighting; Mai Rui Optoelectronics in Shenzhen also has multimedia features included in the LED panel lights, and began to promote the overseas pilot.

 

Xu Chen also expressed his doubts: “due to multiple factors such as price intelligent difficult to fully realize the concept of short-term”, the concept of intelligent lighting is limited to some large enterprises, as well as with communications, sensing, and other technical background enterprises. McNair and photovoltaic sales director Sang Hu LED inside said: “The concept looks good, but for most LED intelligent lighting, the lack of maneuverability, and only these internationally renowned companies to multi-functional intelligent lighting a lot of promotion. ”

 

For many lighting companies in the state of a blind catch shrimp, Wenyuan Guangdong University of Technology Professor recommendations, intelligence is the inevitable trend of development for the future, companies can begin from the current constraints of the power of lighting development, by inserting intelligent group watts to achieve the deployment of communications.

Foxconn: the path of own mains led lighting products

 

Foxconn: the path of own mains led lighting products

 

Foxconn 2005 R & D of LED products in 2006, Foxconn around the plant began trial installation of mains led lighting products. “The person said Foxconn investment LED areas, because the Group across the country factories, the local government of the plant has the energy saving requirements. “At that time the production of mains led lighting products only within the Foxconn factory, and near the living area lighting use.”

 

With the gradual improvement of LED technology and product market acceptance, Foxconn also to other businesses OEM LED lighting products. According Foxconn internal According to sources, 2009, Foxconn, Philips, General Electric, the two major international lighting giant LED foundry business income over 200 million yuan.

 

Since domestic and foreign market, the rapid development of mains led lighting applications, but also to gradually improve the business structure of the Foxconn LED application products.

 

The above-mentioned sources, in 2011, the company produces LED lighting products only 50% of the supply of intra-group lighting replacement project, including the lighting of the factory and nearby streets and living area. In 2012, Foxconn LED Division hope that this indicator down to 40%, in order to gradually increase the sales of the export market.

 

Own factory with much more, so LED street lamp, Led high bay lights, LED explosion proof lights has been the strengths of the Foxconn LED lighting. “The person said.

 

Along with the development of mains led lighting products, Foxconn has also entered the field of LED display. LED exhibition organized recently, Foxconn deliberately on display show only a P3 high-definition 3D LED display, high-quality display participation will stop in front of the Foxconn booth.

LED intelligent lights “enjoy” a high cost at the first stage

 

LED intelligent lights “enjoy” a high cost at the first stage

 

LED intelligent lights costs involved in not only the initial cost of the lamps, but also involve the cost of energy consumed by the lamps, the lamps does not work to replace the lamps required labor costs, as well as the average frequency of lamp replacement required. Departure from the concept it is easy to understand why the led high bay light source is about 50 times the price of the incandescent light source, LED traffic lights market start to 28 times, had formed a new industry. Semiconductor lighting a light color, lighting and special lighting, general lighting will be later extended. Specifically, in recent years, semiconductor lighting market will be widely used in a variety of lights, landscape lighting, windows and lighting, architectural lighting, plaza and street beautification, home decorative lighting, public entertainment and beautify the stage effects lighting and other areas.

 

Theoretically LED are light-emitting diode, but in fact the electrical properties of all LED intelligent lights are the differences, many manufacturers are in the looting of the production schedule, grab number; each manufacturer’s production process is inconsistent, even , the same manufacturer at different times of the processes are different; very high purity requirements of the production of light-emitting diode semiconductor materials, semiconductor purity of the raw materials used by different manufacturers there is a difference, which makes the LED intelligent lights luminous intensity is not identical with the drive current, or a big difference, and resistance to the current capacity and heat differences will naturally different.

How to promote an aging test for led yard lighting

How to promote an aging test for led yard lightingAging is an important guarantee of the reliability of electronic products, is a production of the last essential step. LED products can enhance the performance of aging and contribute to the late stage of the performance and stability. Led yard lighting aging test in product quality control is a very important part, but often neglected in many cases, can not be correct and effective aging. Led yard lighting aging test is based on the product failure rate curve of the bathtub curve characteristics and countermeasures taken, in order to improve the reliability of the product, but this method is not necessary, after all, the aging test at the expense of the life of a single LED products for the price.

 

Led high bay lights’ aging test, including the constant current aging and constant aging. The constant current source is the current constant at any time. Frequency problem, it is not constant current. It is AC or pulsating current. AC or pulse current source can be designed to be valid value is constant, but this power can not be called “constant current source. Constant current aging is most consistent with the operating characteristics of the LED current is the most scientific of the LED aging; overcurrent impact of aging is also factory using the latest means of an aging through the use of adjustable frequency, current adjustable constant current source such aging in a short period of time in order to judge the quality of the LED life expectancy, and can pick out a lot of conventional aging can not be singled out hidden led yard lighting.

New market strategy of solar led street lighting

 

New market strategy of solar led street lighting

 

LED market analysis data show that in 2011 the global solar led street lighting market value reached $ 16.6 billion, the scale of the whole industry is still expanding. The entire product system, more than 60% of the production of market failures and more than 70% of rework due to device failure, but most companies have failed to adopt systematic electronic reliability engineering methods to solve, leading to product quality is not high, life is not long. China’s lighting industry has been price and other factors, is obviously insufficient to extend the life of the product design. In view of this, it can be predicted that in the development process of the solar led street lighting industry, how to assess and improve the service life of LED products will become the subject of a new round.

 

In the heat, the traditional way is to add a heat sink. Optimize the design of LED products with the tapered shape designed to achieve. First, the cone can form a variety of ventilation ducts to help the bulb to transfer heat, cooling effect. Second, a reasonable choice of devices, the test excluding unqualified or early failure help to improve the reliability of the product. In addition, a reasonable process improvement also help to improve the life of the product. Simply put, is to reduce the stress on the device through standard and reasonable process, thereby strengthening the product performance and improve the durability of the led high bay products.

 

In general, improve product reliability can effectively improve product quality, and produce more cost-effective for companies to create more economic benefits.

Improved aging test for solar led street lamp

 

Improved aging test for solar led street lamp

 

Aging is an important guarantee of the reliability of electronic products, is a production of the last essential step. LED products can enhance the performance of aging and contribute to the late stage of the performance and stability. Solar led street lamp aging test in product quality control is a very important part, but often neglected in many cases, can not be correct and effective aging. Solar led street lamp aging test is based on the product failure rate curve of the bathtub curve characteristics and countermeasures taken, in order to improve the reliability of the product, but this method is not necessary, after all, the aging test at the expense of the life of a single LED products for the price.

 

Solar led street lamp aging, including the constant current aging and constant aging. The constant current source is the current constant at any time. Frequency problem, it is not constant current. It is AC or pulsating current. AC or pulse current source can be designed to be valid value is constant, but this power can not be called “constant current source. Constant current aging is most consistent with the operating characteristics of the LED current is the most scientific of the LED aging; overcurrent impact of aging is also factory using the latest means of an aging through the use of adjustable frequency, current adjustable constant current source such aging in a short period of time in order to judge the quality of the led high bay life expectancy, and can pick out a lot of conventional aging can not be singled out hidden LED.

How to create the high quality led lights

 

How to create the high quality led lights

 

Most lighting designers believe that the quality of all LED products are the same. However, many LED manufacturers and suppliers, Asian manufacturers to low-cost global supply LEDs. Surprisingly, only a small part of these manufacturers to create high quality led lights. For applications that only used as a simple indicating the role of the low quality of the LED is sufficient to meet the requirements. However, in many areas of the requirements of consistency, reliability, solid-state instructions or lighting must be of high quality led lights, especially in harsh environments, such as highways, military / aerospace, and industrial applications.

 

In the New York subway stations and other environmental, safety requirements are very demanding, the led high bay lights must meet the high quality requirements of the fundamental factors.

 

Distinguish between the level of LED quality factors? How to tell the difference between the two LED’s? In fact, high-quality LED chip start until assembly is complete, during which there are many factors to consider. Tier-One, the LED manufacturing company capable of producing excellent indicators of the same wafer is to start from the high-quality LED manufacturing materials, enough to make a good chip. Determine the conditions of the LED performance, the chemical materials used in wafer production process is a very important factor.

 

A 2-inch wafer can be cut out more than 6000 high quality led lights chip, there is only individual chip performance overall. A good chip manufacturer makes chips in the difference of color, brightness, and the voltage drop is very small. When the LED chip package is completed, many of their performance, there may exist a great difference, such as perspective. In addition, the impact of packaging materials is quite large, for example, silicone epoxy performance.

Heat dissipation for high power led applications

 

Heat dissipation for high power led applications

 

High-power LED products and devices in the application process, thermal, electrostatic protection, welding has a great impact on the need to attract the customers of the application side attaches great importance to its characteristics.

 

Semiconductor light-emitting diode chip technology limitations of LED photoelectric conversion efficiency remains to be improved, especially in high power led applications, because of the higher power, about 60 percent more electrical energy into heat release (along with the development of semiconductor technology photoelectric conversion efficiency will be gradually increased), which requires the end-customer to do when the application of high-power LED products heat work to ensure the normal work of the high power led applications.

 

1. Effective cooling surface area:

 

1W high power led high bay white (other colors are basically the same) Division I recommended to the sum of the effective cooling surface area of the heat sink ≥ 50-60 square centimeters. 3W products, recommended the sum of the effective cooling surface area of the heat sink than 150 square centimeters, as the case of higher power and test results to increase as much as possible to ensure that the heat sink temperature does not exceed 60 ℃.

 

2. Connection method:

 

Please ensure that the two contact surfaces smooth connection of high power led applications substrate and heat sink, good contact, to enhance the degree of integration of the two contact surfaces, it is recommended that the surface coating layer of thermal grease in the bottom of the LED substrate or heat sink (thermal grease thermal conductivity the ≥ 3.0W/mk), thermal grease evenly coated, amount, and then screw press fit fixation.