The 2013 Zhongshan Lighting Quality Upgrading Strategy Conference was successfully held in Zhongshan Xiaolan on the 7th of this month. This conference was organized by General Manager Du Jifang of Hongbao Lighting, Hong Ziang, Chairman of Pinshang Lighting, Chen Shaozhong, General Manager of Guangyang Lighting, and Xiaobailong. Chairman Wang Yunlong of Lighting, Li Xiaoping, General Manager of Auman Lighting, Guo Huaguo, General Manager of Minguang Lighting, Luo Quanxing, Executive Vice President of Shanghai Luyuan Lighting, Cai Xianghu, General Manager of Ward Lighting, Lei Zongping, Chairman of Yu Zhiyuan Solar Energy Technology, and Sun Star Alliance Investment Co., Ltd. The company’s principals Zeng Shuneng, Guang Bo Hui’s Managing Director Guo Xiu, General Manager of Jiuzhou City Zhang Liqiang, Zhongshan Semiconductor Lighting Industry Association’s Secretariat Tu Qiaoling, and Zhongshan District Lighting Association’s Secretary-General District Decheng attended the conference. At the conference, Zhou Xuejun, marketing director of Philips Lumileds Asia, said that the photoelectric parameters of LED lamp beads mainly include light efficiency, luminous flux, color temperature, color coordinates, color rendering index, and voltage.
Since LED is a relatively new product, China's national standards lag, but the country provides product qualification testing. The price of LED with international safety certification (such as GS, CE, UL, etc.) and national product quality certification is higher because these products are reliable in terms of safety design.
According to incomplete statistics, there are more than 200 manufacturers in the PRD-encapsulated LED lamp bead (better packaging equipment), plus Taiwan, Europe, America and Japan, LED packaging manufacturers are countless, some LED lamp beads well-known brands, research and development The experience is relatively rich, and the use of raw materials, process control, and reliability are relatively secure, but their prices are high. However, the prices of different brands of LED lamp beads are quite different, and some prices are even several times different. However, the quality is difficult to assess. If one simply evaluates the quality based on price, it is obviously not able to satisfy the reliability guarantee.
LED lamp beads with different chip packages cost differently, and different brands of chips can not be separated with the naked eye, LED packaging manufacturers may appear to use small-brand chips to impersonate well-known brand chips, for LED lamp manufacturers, need and packaging Manufacturers establish a good relationship of cooperation, inspect their use of the chip process, to ensure that the purchase of the contract is the chip package of LED lamp beads.
Zhou Xuejun said that it is more important to use the more optimized standards to detect lamp beads in the testing process.
The copper base board is the most expensive one among the metal substrates, and the heat conduction effect is many times better than that of the aluminum substrate and the iron substrate. It is suitable for high-frequency circuits and regions with high and low temperature variations and the heat dissipation and architectural decoration industries of precision communication equipment.
Generally, the finishing include ENIG, immersion silver, LF HASL, OSP, etc. The copper substrate circuit layer is required to have a large current carrying capacity, so a thick copper foil should be used, and the thickness is generally 35 μm to 280 μm; the thermal conductive insulating layer is the core technology of the copper substrate, and the core thermal conductive component is aluminum oxide and silicon powder. It consists of a polymer filled with epoxy resin, low thermal resistance (0.15), excellent viscoelasticity, resistance to heat aging, and ability to withstand mechanical and thermal stresses.
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