On June 10, 2010, the “6th China LED Industry Theme Summit Forum” hosted by Gaogong LED was held in Guangzhou·China Import and Export Fair Complex. The report topics cover the hot topics of the current LED industry, such as talent, market, investment, technology, EMC model.

Tang Guoqing, general manager of CREE China Market, Zhang Jiliu, Chairman and General Manager of Zhongwei Optoelectronic Technology Co., Ltd., Gong Weibin, General Manager of Ruifeng Optoelectronics Co., Ltd., He Wenming, Chairman of Fujian Zhongke Wanbang Optoelectronics Co., Ltd., Lelei Optoelectronic Technology ( Xiong Kecang, Chairman and General Manager of Shanghai) Co., Ltd., Zhang Hui, Deputy General Manager of Guanyu Technology Co., Ltd., Li Yimin, General Manager of TCL Lighting Electric Business Department, Ye Rongnan, Professor of High-tech Industry of Fujian Optoelectronic Industry Association, and Deng Hao, Lawyer of Cube Law Firm Mr. Zhang Ziqi, general manager of Sunda Baili, Chen Bin, general manager of Zhonglong Transportation Technology Co., Ltd., and Dr. Zhang Xiaofei, senior engineer of LED Industry Research Institute (GLII) made wonderful topic reports at the forum.

The 6th Summit Forum attracted more than 600 spectators. They are mainly from senior managers, technical experts, investment institution investment managers and government-related functional leaders of foreign LED and lighting companies.

LED drive lighting transformation five elements

What changes will LEDs bring to China? Tang Guoqing believes that the transition from traditional lighting to LED lighting has spread around the world. LED efficiency has reached 131 lm / W, is expected to reach 161 lm / W in the second half of this year, LED drive lighting revolution has become a fact, we should think about how to promote the development of the LED industry, do a good job of LED, use LED. In March 2010, a well-known Japanese company stopped producing ordinary incandescent light bulbs, and the comprehensive expansion of LED lighting business is also a strong evidence.

Traditional light sources are usually lighted from the outside of the building or weakly combined with the building. Due to scattering, the light will hit unnecessary places and cause the light source to be wasted. The directionality of the LED is relatively strong, and the secondary optical design can be used to drive the light to the desired place, reducing unnecessary light pollution. In addition, high color saturation is another indispensable advantage of LEDs. LEDs can be modulated into colorful and colorful images through red, green and blue primary color chips, becoming an indispensable part of beautifying cities.

Tang Guoqing believes that LED can drive the success of lighting reform in the following five elements: 1. Excellent environmental protection, using real green environmental protection light source to eliminate environmental hazards at the source; 2. High luminous efficiency, as a sustainable development, energy efficient lighting Change is imperative; 3, good color, to create a more comfortable and safer high-quality evening life for people. 4, color dazzling, high color saturation picture is an indispensable part of urban beautification; 5, flexible, more humanized design, the combination of comfort and lighting and the enjoyment of lighting beauty has become a new focus .

Traditional lighting and LED lighting war

Zhang Xiaofei, CEO of Gaogong LED, deeply analyzed the current situation of LED lighting and traditional lighting in the market and the situation of traditional lighting companies involved in the LED industry. Zhang Xiaofei pointed out that the war between LED lighting and traditional lighting has just started, and the next ten years will be Long-lasting war, victory and defeat is completely in the hands of all enterprises, with the rapid expansion of LED lighting scale, LED lighting gradually replaces traditional lighting irreversible, time will always stand on the side of LED lighting.

Zhang Xiaofei believes that traditional lighting companies have strong capital accumulation, strong manufacturing capabilities, and strong sales channels. LED lighting cannot ignore these advantages of traditional lighting companies. LED lighting companies need to acquire capital, master core technologies, and seek open cooperation. Develop.

Break through the bottleneck and accelerate the popularization of LED backlight

In the LED package, there are some bottlenecks in the field of lighting and backlighting. Gong Weibin, general manager of Ruifeng Optoelectronics pointed out that LED lighting has higher power and higher requirements for heat dissipation and light decay; while backlighting is mainly for consistency requirements. However, LED TV color rendering and reliability are the key points. Consumers choose LED TV mainly to be optimistic about its color performance. At the same time, for LED TV, one LED is broken, and the whole TV is darkened. This is a difficult for many domestic companies. He believes that the solution is mainly the improvement of light efficiency, the solution of heat dissipation, the way of phosphor distribution and the development of high reliability materials.

Gong Weibin said that the thinner the phosphor coating, the higher the efficiency obtained. From the packaging materials, it can be seen that the thermal resistance of the chip substrate material and the solid crystal material becomes the bottleneck of the thermal resistance of the high-power LED assembly. He also cited the advantages of eutectic flip-chip technology. He believes that the eutectic process will greatly improve the reliability of the high-power LED components due to the reduction of the overall thermal resistance for high-power LEDs. For a 40 mil chip, the thermal resistance can be controlled at 1 W/mk. By using a eutectic process and other packages, the overall thermal resistance can be controlled within 6 W/mk. He said that in the domestic unsatisfactory equipment, the use of solder paste can only be said to be a temporary measure, and the supporting substrate materials also need to be selected. The advantage of flip chip technology is that it can improve the light extraction efficiency of the wafer and improve the heat dissipation path.

However, Gong Weibin finally stressed that LED backlight has the advantages of low power consumption, thinness and high color saturation. At present, LEDs still need a lot of improvement in TV applications, such as heat dissipation, metamerism, improvement of light efficiency, and choice of optical design and light guiding materials. The field of lighting and backlighting is the twin spindle of LED growth, LED technology. The upgrade will make its application field wider. Gong Weibin said that in the future, LED lighting will be popularized and will be used in classrooms, shops, stadiums, auditoriums, libraries, homes, offices and other places.

LED light color online measurement and control system application

“With the continuous improvement of LED technology, LED efficiency and brightness continue to increase, LED has gradually been applied to various types of light sources, such as backlights, landscape lights, lights, street lights, indoor and outdoor displays, and even now into home lighting. The development of LED has become more and more extensive. The new generation of lighting sources has penetrated into an irreplaceable position, and the quality control of LEDs and the visual requirements for people are getting higher and higher.” Zhang Jiliu, Chairman of Zhongwei Optoelectronics Co., Ltd. If so.

Zhang Jiliu believes that since the composition of LEDs is a single point source electronic component, when the LED needs to be used as an array display, a screen component, or an illumination source, the human visual perception demands color and brightness, whether it is color or brightness. Unevenness can give people an uncomfortable feeling. The quality control of LEDs and the visual requirements for people are getting higher and higher. The current application requirements for LEDs are mainly achieved by controlling and sorting colors and brightness. The sorting solution can be implemented from the following schemes: chip-based test sorting; test control and sorting in the packaging process; and uniform test sorting of the lamps.

Is the EMC mode feasible?

With the rise of LED lighting, the state's support for the development of EMC, EMC is feasible to become the focus of discussion in the industry.

Chen Bin, general manager of Zhonglong Transportation Technology Co., Ltd. said that the implementation of the EMC model means that LED manufacturers have to take into account two roles, one is the product manufacturer and the other is the service provider. It is not yet clear whether the EMC model is profitable under current energy-saving conditions. For non-profit organizations like the street lighting management department, it is a mistake to achieve profitability through non-profit work.

Chen Bin believes that role change is also a problem for EMC. Calculating the annual maintenance cost of high-pressure sodium lamps into EMC's savings means changing the role of the manufacturer, from product manufacturers to service providers.

Chen Bin also pointed out the problems in the implementation of the EMC model of energy-saving audit and fund payment process. He believes that the energy-saving audit lacks authoritative certification, and the payment model has no clear policy provisions, and the risk is relatively high.

Chen Bin said that the EMC model is only a phased phenomenon in the development of LED lighting, and it is unlikely to become the mainstream model for LED lighting promotion in the future.

PV&LED application in garden lights and landscape lights

Zhang Hui, deputy general manager of Guanyu Technology Co., Ltd. analyzed the common problems of existing solar LED lamps at the forum. He believes that solar lamps currently have shortcomings in narrow illumination range, short battery life, poor quality of light source, low system efficiency, poor materials, high failure rate and poor maintenance. They are low price, innovative, high quality, long life and easy to maintain. The demand is very different. How to make solar lighting products is particularly important for enterprises.

The most basic is the selection of solar panels. The factors that should be considered for the selection of solar panels used in lamps include: modeling, no heat island effect, reducing the influence of temperature on the temperature of the solar panel, and having a stronger power output in rainy days.

Zhang Hui also introduced the classification of solar photovoltaic panels, and focused on flexible amorphous silicon thin film solar cells, including technology, materials, output functions and advantages. Compared with ordinary glass-encapsulated crystalline silicon solar cells, the advantages of flexible amorphous silicon thin film solar cells are more obvious.

No standard size

For traditional lighting and LED lighting, Li Yimin, general manager of TCL Lighting Division, said, "If the fluorescent light will disappear, it is also because of environmental protection, not because of LED. People are inseparable from light, just what kind of light is needed, how much light How much lumens of light do you buy for a dollar? I think the LED industry does have unlimited prospects."

Li Yimin pointed out that the next opponent and killer of LED should be an electrodeless lamp. The life of the electrodeless lamp is not necessarily shorter than that of the LED. The price may be lower than that of the LED. At present, the standard speed of the state-developed electrodeless lamp is very fast, so that the electrodeless lamp may soon be Come up.

“There is no standard and scale.” In the speech, Li Yimin expressed his eagerness for the national standards of LED. “Through peers through seminars, forums, summits, we should also appeal at the national level that there are no standards, no scale, no one company. I dare to buy a piece of equipment for my own money, and this device does not have the standard. This is quite a strange thing, but it is now."

How to improve the reliability of LED products

Xiong Kecang, chairman and general manager of Lelei Optoelectronics Technology (Shanghai) Co., Ltd., clearly pointed out that to achieve high reliability LED lighting products, every LED project must be perfect, and sleep every night. In a passionate speech, Xiong Kecang introduced that Le Lei Optoelectronics has used eight months of product serialization, standardization, systemization and product reliability verification from its inception to summarize the successes and failures. The rate is always controlled at around 1%.

Xiong Kecang believes that the factors affecting the reliability of LED products and systems are: pre-sale engineering project review, product and system design and development planning and standards, product and system reliability verification standards. Companies should create a “four-win” thinking between suppliers, professional distributors, government units and lighting design consultants. He believes that good products / systems + good lighting design + good professional dealers + good system installation and commissioning = high reliability products / system engineering = "cash".

How to improve the quality of lamps and reduce costs

He Wenming, chairman of Fujian Zhongke Wanbang Optoelectronics Co., Ltd. pointed out that the application of LED lamps is unevenly distributed. The areas where LED applications are concentrated are mostly concentrated areas of the LED industry. The large-scale application of lamps is still dominated by the government. He Wenming analyzed the status quo of the domestic LED indoor lighting market, and proposed that the LED lamp price is too high, which makes it difficult to popularize consumers. He said that the lack of standards has led to market confusion, product design has no uniform specifications, product damage has no uniform accessories, and the lack of standards has led to enterprises. They are independent.

He Wenming emphasized that the use of integrated LED chip lighting for LED luminaires is a future development trend because of its cost and high efficiency advantages. Zhongke Wanbang has achieved more than 100lmW of luminaire efficiency by using integrated chips.

How to protect trade secrets in the process of brain drain

The so-called trade secrets are technical information and business information that are not known to the public, can bring economic benefits to the right holder, have practicality, and take confidential measures by the right holder.

According to the existing law, trade secret protection and restrictions on employees may not disclose any trade secrets of the company, may not compete with the former employer, and may not conduct commercial transactions with the customers of the former employer, even if the customer takes the initiative and does not induce or actively attract customers to leave. Original employer.

Deng Hao, director of the Intellectual Property Professional Committee of the Guangdong Lawyers Association, used many classic legal cases and analyzed the legal relationship between the LED industry talent flow and trade secrets from the LED professional perspective.

Deng Wei believes that employees are the biggest threat to trade secrets, mainly characterized by the disclosure of trade secrets, self-employment competition with the company and job-hopping for competitors.

Road lighting dynamic measurement method

At present, road lighting measurement is mainly measured by the point method, but this method has many limitations in practical use. Prof. Ye Rongnan from the Fujian Photovoltaic Industry Association pointed out that the measurement method adopted by the distribution method is quite cumbersome, the illumination measurement is difficult, and the brightness measurement is more difficult; the calculation is cumbersome, and the road is closed, not to mention the measurement of glare, the labor cost is large, and the social cost is greater.

Therefore, it is necessary to create a vehicle dynamic field test equipment and establish a more objective, simple and accurate measurement method to evaluate the road lighting quality.

To this end, Professor Ye proposed a dynamic measurement method for road lighting. Since the light information acquired by the human eye in road observation is brightness rather than illuminance, the target can be identified when there is a difference between the target light and the road surface light; this difference refers to the luminosity difference, which contains both brightness and dominant wavelength. (hue) and color purity (saturation); the three can be identified as long as one of them differs.

The road lighting dynamic measurement method is characterized by: simulating the human eye to observe the road surface while driving; instead of fixed-point detection, it simulates the driver's driving process for dynamic detection, which more truly reflects the scene seen by the human eye; The vehicle-mounted instrument simulates the driving path of the car for dynamic measurement; it more objectively, comprehensively and accurately reflects the whole process of the human eye in the driving state; the measurement is mainly based on the brightness, and the illuminance is supplemented; the true feeling of the human eye is reflected faithfully, There will be a sense of "scratching the boots"; there is no need to block the road, the social cost is low, and it has strong operability. And save labor, save time, safety and reliability.

LED lighting drive power development trend

Zhang Ziqi, general manager of Sunda Baili pointed out that energy-saving and environmentally-friendly LED lighting power supply is one of the main application directions of LED driving power supply. LED outdoor lighting driving power supply development trend: high efficiency, high reliability, waterproof and dustproof, lightning protection, Electroless technology, standardized modularization, intelligent (iPower); LED indoor lighting drive power development trends: high efficiency, high reliability, miniaturization, low cost, electroless technology, intelligent (iPower).

Zhang Ziqi said that in addition to the advantages of energy saving and environmental protection, LED also has the characteristics of semiconductor digital control. The current development trend is to control the lighting fixtures by adding control modules to the control end of the power supply to realize wired or wireless intelligent control. In particular, the development and application of technologies such as wireless network automatic optimization control module and remote wireless control module combine LED lighting with network control technology to realize intelligent control of LED lighting.