Must solve the white light LED high color rendering and high efficacy of contradictions - (AddTime - 2013-03-15)

Last year, will face losses, malignant competition, market disorder LED lighting industry at present the product development situation how? A few days ago, Aladdin lighting network reporter with the national development and reform commission rare earth do the rare earth information "editors, Shanghai lighting association WuHong visit LED exhibition understand the latest LED lighting products.

Must solve the white light LED high color rendering and high efficacy of contradictions

In the event to know, at present most of the enterprise product basic similar, and will be specially marked efficacy, but a handful of enterprise will be particularly marked display index. WuHong said efficacy increase with the increase of the temperature often shading, color rendering variation of outdoor lighting applications, although the impact is not big, but in indoor lighting field, high photosynthetic efficiency with the low color rendering will allow the irradiated surface serious "color", from the essence of the indoor lighting needs. In addition, as a point source for the semiconductor lighting, high photosynthetic efficiency means that the light intensity is too high. In a small space range of indoor application will lead to serious glare, make the person feels dazzling or produce dazzled, a slight place also will therefore see not clear, the burden on the eyes will aggravate natural, easy to produce the eye fatigue.

So, especially LED indoor lighting products, and to carry on the long-term and close contact, can not blindly pursue high photosynthetic efficiency and sacrifice color rendering index performance, should deal with high efficacy and high color rendering, the contradiction between the in improving efficacy and at the same time keep show the rationality of the index that emphasizes efficacy, but also should pay attention to light and color of the organic fusion and harmonious and unified. At present can reach more than 80 is reasonable, but the real can achieve less also. Therefore, in the indoor lighting, small power, high color rendering of the multipoint distribution lighting should be healthy lighting development mainstream.

COB packaging from watching the initial combat

Packaging as LED industry chain of middle role, it is equivalent to a throat status, different packaging line can achieve different efficiency. Last year, the industry are claiming COB will present the mainstream trend. From this year's LED the fair look, most of the enterprises have identity COB packaging form in horizontal and vertical type radiator has better performance, most of the packaging line also tend to use COB form, from last year's looking to test the waters application, COB packaging form initial success, but at present, including Taiwan manufacturers, can make high reliability COB light source enterprise rare breed. WuHong mentioned, COB packaging is the future development direction of the package the dominant, but at present from the display products situation, COB packaging still has light failure, short life, poor reliability shortcomings need to break through.

In addition, the visit also understands, at present most of the enterprise lack of 200W led Flood light and lanterns in the working state whether reasonable test methods, and most use inspection LED light source method to determine the performance of the 200W led Flood light and lanterns, WuHong think it is not advisable mode, go against the development of products. Compared with the traditional lighting lamps and lanterns, 200W led Flood light and lanterns detection is a new subject, WuHong stressed that test 200W led Flood light and lanterns, not a single light source test, it is necessary to test the lamps and lanterns, can we reach a best result.

In general, visit the process found, display products such as white LED is not making much progress, whether efficacy or light sensors compared with last year without too much change. WuHong also says, the emerging industry total need time precipitation, and will not be accomplished overnight, and along with the incandescent lamp map and the implementation of LED financial subsidies to promote, LED lighting enterprise will be in the policy stimulus under the shuffle and upgrading, and in the integration of the strong, stronger, in order to improve the product manufacturing level, to standardize the industry.