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"The price of LED products is falling at a rate of about 20% per year, thanks to the rise of lower-cost COB packaging." Wang Mengyuan, general manager of Foshan Zhonghao Optoelectronics Technology Co., Ltd. (hereinafter referred to as "Zhongyi Optoelectronics") Leading one of the first companies in China to take the lead in COB professional development.
Relying on the research and development platform of Sun Yat-Sen University Semiconductor Lighting System Research Center and Foshan Research Institute of Sun Yat-sen University, Zhonghao Optoelectronics currently has a complete LED chip research and development line and the first automatic high-color rendering index integrated light source module automatic production line in China.
At the same time, the company has "the sapphire substrate GaN material epitaxial growth", "ZnO transparent conductive film epitaxial growth and high-brightness LED chip process" and "high color rendering high-power white LED light source module package" and other key common technical fields The results, as well as nearly forty patents for inventions and innovations, form a series of products with independent technology and cost competitiveness.
"We will exhibit a series of products such as standard optical component COB, the world's only ZnO transparent conductive film chip, high-efficiency and high-performance COB light source, and high-quality light source with R9 greater than 50." Wang Mengyuan said that whether it is for this senior engineer LED lighting exhibition, or high-tech LED platform, he is full of expectations.
Wang Mengyuan believes that the road to professional development is the advantage that Zhonghao Optoelectronics is different from other peers. Only in this way can we provide high-quality light source and convenient system Solutions for high-end LED lighting enterprises. “To dominate the unique market with outstanding advantages, and to enable customers' products to be competitive in many brands.â€
In order to strengthen cooperation with the upstream and downstream industry chain, Zhonghao Optoelectronics researches and develops the technology of epitaxial chip technology, aiming at improving the comprehensive performance of COB light source and reducing costs, breaking technical barriers, thus better supporting downstream lighting enterprise customers. The constraints of technical bottlenecks.
Wang Mengyuan revealed that the ZnO transparent conductive film technology developed by Zhonghao Optoelectronics has been successfully applied in the LED chip process. It has complete independent intellectual property rights and is about to enter the market stage. In the future, this technology will be applied to Zhonghao Optoelectronics according to actual needs. In the COB product.
In addition to the world's only ZnO transparent conductive film chip, the high-efficiency and high-performance COB light source will also be another representative product promoted by Zhonghao Optoelectronics. As we all know, the light effect and the indicator have always been a contradiction. How to improve the light efficiency in the case of high index is also a recognized problem in the industry.
At present, the mainstream way to achieve high color rendering index LED white light in the world is to increase the red powder excited by the red spectrum by changing the phosphor material. However, this method is greatly affected by the excitation spectrum and temperature of the red powder. The generated heat makes the red and white spectral characteristics of white light change easily. The intuitive result of this change is generally reflected in the change of color temperature and color rendering as the product lighting time increases, and the excitation efficiency becomes weak. The light effect reduction effect also occurs.
"There are many factors affecting the color rendering index and light efficiency. The key is to find a specific balancing method according to different applications. Structural design is the core." Wang Mengyuan said that after years of research, Zhonghao Optoelectronics has changed the traditional discrete packaging devices. In a combined manner, a multi-color chip is created, and the best color rendering index and light efficiency are obtained by calculating a combination of simulated fitting spectra, and the color temperature is sought to be near the black body trajectory.
According to the above process innovation, the white light source has the characteristics of color rendering index above Ra90, light efficiency of 110 lm/w or more (3000K color temperature) and strong comfort, which fundamentally solves the problem that the white light module can only rely on the sacrifice light effect. To raise the old problem of color rendering index. 
Zhonghao Optoelectronics will bring high-efficiency and high-performance COB light source to the 2013 High-tech LED Lighting Exhibition
[Text / high-tech LED reporter Liu Pingping] In just a few years, the price of LED lighting products has fallen as fast as a roller coaster ride. The "high-priced goods" that the old people can't match have become "civilian goods" placed on the shelves of major supermarkets. .