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On April 25th, 2009, Aladdin Lighting Network invited domestic authoritative experts to hold a rational call for the 2009 LED application product achievements and trends behind Shenzhen, to share high-level with LED lighting companies, designers and terminal owners. The wisdom of the results. The seminar was a lively discussion.
There are many questions about how the LED standard should be used. International OLED Standard Project Leader, LED Backlight, Member of the International Standards for Optical Radiation Safety, and Associate Professor of the Department of Optoelectronic Information Engineering, Zhejiang University (click here to learn more about the speech): Tong Tongsheng: LED future standards for energy saving and environmental protection (Figure ) ); Tsinghua University Shenzhen Graduate School of Electronic Physics and Laser Devices, Associate Researcher; Tsinghua University Shenzhen Graduate School of Semiconductor Lighting Laboratory Deputy Director Qian Keyuan (click here to learn about Qian Keyuan's speech details: Qian Keyuan: LED street lights can It was not easy (Fig.) and other speakers gave detailed answers.
Question: Hello, I want to ask Teacher Yu, I recently did a project and found a problem. He used LED lights in the swimming pool. I have seen the IEC standard. ICE60598 has a swimming pool standard, but it It was in 1993, and it has not been updated in the future. There is a standard in it that uses 12 volts. There was no LED before. There is no process in IEC. How do they review the standards and include LED applications? Timeline? How to update the standard?
牟åŒå‡( 牟åŒå‡é˜¿æ‹‰ä¸ç…§æ˜Žç½‘åšå®¢>> ) : The question you just mentioned is very timely. In fact, for the standard of our street lamp, I talked with the chairman of the street lamp committee a week ago, and how to do the standard of the street lamp, of course, There are also many opinions. In fact, everyone is doing LED street lights. He said that our street lamps have their own standards. Don't use the original standards. If people who write standards do not have such expertise, they will miss a lot. To address the original safety standards, our country is 7000.1GB. IEC60598 is a special requirement for LED lamps, equivalent to IEC60598 or GB7000.1. For example, there is a separate standard for light safety of LEDs, including some voltage requirements. Now that this has not been mentioned in the IEC, the National Standards Committee believes that it will soon be the subject of what you just said.
Peng Zhenjian: I would like to add that the first question raised by the gentleman just now is the lighting of the swimming pool. I don’t think too deeply. The swimming pool lamps have been placed in the water for a long time. The standard requires that your lamps be based on three types of lamps to avoid The lighting of your luminaire is caused by the problem of waterproofing. The luminaire working under the water requires a luminaire designed under special safety voltage. The voltage of this luminaire has a standard voltage, and there is no necessary connection with the light source you used. The teacher also said that when the National Standardization Technical Committee Lighting Subcommittee discussed the LED issue, as you just said, LED should not be dedicated to a professional, some standard revisions of LED lamps, now I understand, IEC60598 In the 2005 version, the range we described has not been classified, and the classification is used as a simple noun. It was previously classified into tungsten filament lamps, fluorescent lamps, and gas discharge lamps. There is no such classification now, and simple electric light sources are included. From the changed mode, it can be said that the IEC standard 60598 does not consider too much light source from the overall safety standard. We have encountered a problem now. The standard of our traditional luminaire has a big difference in the part of the light source. understanding. Traditional luminaires do not have a light source, but it is designed for light sources. Now many LED luminaires combine LED components, modules and drivers into a complete whole. Here we may bring some understanding of standards and understanding. Standards, measures and methods bring some different understandings from traditional lamps.
Standing on my own point of view, like some performance, like some junction temperature and indeed have the requirements as a supplementary requirement, as most of our products, from the safety test, the battery compatibility test, basically no time It is my opinion to call LED lamps or traditional lamps. Like some performance tests, we are still returning to the previous problem in the application of LEDs, or the problem of light source. For example, we can evaluate the performance of incandescent light bulbs. It has independent standards. Fluorescent lamps also have independent standards, but LEDs are used. In the specific product, we must evaluate the performance parameters of the whole product together, including thermal performance and chromaticity performance. If one day, now some LEDs are used as a substitute, the luminaire is a luminaire. The light source is a light source, and the standardization committee should be considered together. The IEC does not currently have a clear consideration of this aspect.
Question: Hello everyone! I am from the LED division of Osram. I have a question to ask the teacher. When I read the standard of street lamps in Guangdong, there is a reference. The first level is 78lm/w, the second level is 68lm/w. This value is very Accurate, I think from the engineering point of view, how do you consider when you develop this standard, after which calculations will calculate such accurate values?
Qian Keyuan (Qian Keyuan Aladdin Lighting Network Blog >>) : You said that the exact calculation, in fact, this calculation can not be calculated, because the LED personal use is not the same, the effectiveness of Osram and Taiwan chip, Hong Kong chip light energy also Different. According to the technology that the industry can now do, at the time we felt that the technology that could be done at that time was the first level. If this standard does not come out, you will surpass me tomorrow. This is the first point to consider. The second point is that the country also has a similar draft standard in the formulation. The local standard must refer to the relevant national standards when it is designated. At that time, it was considered that it could not be lower than the national standard. If it is low, it would be meaningless. At that time, the country also had some reference values. We still improved a little more than the reference value. That is how it came out.
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