Wanbang Optoelectronics: Realizing the LED lighting effect 140LM/W industrialization
The LED lamp of the whole lamp 141.2LM/W adopts the company's own MCOB (Multipal chips on board, Multipal cups on board) packaging technology, which brings a new concept and packaging mode to the industry. It is understood that the realization of high-efficiency MCOB packaging technology must achieve breakthroughs in thermal processing, optical processing, primer, wavelength matching technology and film technology to effectively ensure high light efficiency, high stability, color consistency and low light source. Attenuation, etc., Wanbang Optoelectronics has made a major breakthrough in materials through long-term technical cooperation with the Institute of Material Science of the Chinese Academy of Sciences. After two years of continuous efforts, the above technology is realized.
High stability and color consistency are the two characteristics of the company's luminaires. One of the biggest difficulties in LED packaging is the consistency of color control. COB package is to place multiple chips in a reflective cup. Different chips have different rated voltages and currents, and the wavelength of the chip is different. Therefore, color inconsistency will occur in the phosphor blending process. Especially for fluorescent strips, it is even more difficult to achieve color balance. In order to overcome the above problems, Wanbang Optoelectronics independently developed an automatic test powder replenishment system in 2010. Under the same wavelength, the color consistency problem was fundamentally solved. In order to improve production efficiency and reduce production costs, the company Based on the automatic test powder replenishment system, the IC profiled wavelength matching technology has been added to ensure the color uniformity of either single or multiple cups, whether single or multiple MCOB light sources. According to He Wenming, The technology has applied for 110 patents, of which more than 20 technologies have applied for international patent protection.
(lamps in MCOB package structure)
Stability is the goal pursued by LED lamps. The advantage of MCOB package is that the chip is directly fixed on the optically processed aluminum plate, which fundamentally eliminates the problem that the aluminum substrate blocks heat dissipation due to the insulation layer. The heat emitted by the chip can pass directly. The aluminum plate is exported to reduce the heat dissipation channel; on the other hand, since the MCOB package is a multi-cup structure, the chip can be evenly distributed on the aluminum plate, and the heat dissipation is balanced. It has been proved that the two SMD lamp tubes and the Wanbang MCOB tube are put into the process. Baking in a 90-degree oven, the light decay of the SMD lamp is mostly 20-40% in just 3 days, while the MCOB structure lamp can be controlled within 1%. According to Dr. Wu Shaofan, the company's technical director, in order to verify the reliability of the products, different batches of lamps will be taken out for a series of tests such as high and low temperature impact, baking, salt zero, drop, vibration, etc. to ensure that the products are safe. .
According to Summer, the head of Wanbang's marketing department, the company's market is mainly for the international market and domestic EMC (contracted energy management company), especially EMC has higher requirements for products, must meet high light efficiency, long life and high cost performance. Conditions, and the general patch light can not meet the five-year warranty requirements of EMC (Contract Energy Management Company). Through business development and questionnaire survey, the company found that from the first half of 2009 to the first half of 2010, some domestic manufacturers launched the EPC (Contract Energy Management Business) project, but it disappeared in the first half of 2011. The most fundamental reason is 60. The reason for % is because the product has a large number of quality problems after installation for a period of time, which makes the money difficult to recycle, 40% because the product is not high enough, the energy saving is low, and the cost recovery is too long. These unfavorable factors are The company that did not dare to continue to invest in the EPC business in the early stage is the most fundamental reason. And the newly registered EMC has sharpened the knife, but can't find the right product, and dare not rush to "start".
According to the current state of the domestic market, it is unrealistic for domestic enterprises to obtain a large number of orders through the sale of traditional channels. After all, LED lighting has no standard, the price of LED lights is high, no state subsidies, LED lighting has not been consumed by consumers. For a number of reasons, such as recognition, the EPC business model has become the biggest driver of LED lamp sales. To this end, the company started with two major factors that constrain EPC business. After long-term research and development and adherence to its own original technical route, 141.2LM/ The lamp of W was born.
It is understood that the company's 125LM/W fluorescent strips are being produced on a large scale. The 140LM/W products have also received a large number of EMC orders, which have achieved industrialization. The LED bulbs have achieved a total lighting efficiency of 100-120lm/ w. "EMC mode requires high light efficiency to achieve energy saving effect and save cost. According to previous judgments, the overall lighting efficiency of fluorescent lamps reaches 140 lm/w or more, and the bulb lighting effect of 120 lm/w or more is suitable for the development of EMC mode." He Wenming said. It is understood that the current bulb light efficiency index is generally 60-90 lm / w, fluorescent tube is 70-100 lm / w.
After the launch of high-efficiency products, Wanbang Optoelectronics accelerated the pace of cooperation with the Chinese Academy of Sciences and ASM to promote the construction of MOCB packaging automatic production lines. “A fully automated production line will quickly increase production capacity, improve product reliability and reduce costs. The daily output of fluorescent tubes will reach 50,000-80,000. In the future, Wanbang will give full play to its unique advantages. Integrating domestic EMC," He Wenming said. At the same time, he also said that MCOB packaging technology will become the mainstream technology of LED packaging in the future.
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