200lm/W white LED when listed? Blueprint for development

White LED in the near future in the end there will be more bright? At the beginning of January 19, 2011, the third new generation of lighting technology exhibition, saw the main LED manufacturers open product development blueprint, it will be clear in the next few years will continue to improve the luminous efficiency.

In the display of the input current 350mA luminous efficiency as high as 160lm/W of the white LED CREE (Cree) exhibition, open to 2014 lighting with white LED development blueprint. The blueprint shows that following the 160lm/W product (Research and development stage of 161lm/W) after the 186lm/W class products will be 2012 to 2013, and then 208lm/W class products will be unveiled in 2013 ~ 2014.

In addition, in the new electronic exhibition, discloses the company sales of Nichia white LED development blueprint. According to the blueprint, the input power of 0.1 to 0.5W level of luminous efficiency of the product will be increased from 122lm/W in the second half of 2010 to the second half of 2011 130lm/W. Input current of 350mA products equipped with 3 or 6 LED chip multi chip, its luminous efficiency will be increased from the second half of 2010 to the first half of 115lm/W 130lm/W, the second half of the year reached 150lm/W. Belong to 350mA products, equipped with 1 large LED chip model, its luminous efficiency will be increased from 130lm/W in the second half of 2010 to 50lm/W in 2011.

Although the luminous efficiency of white LED will continue to improve, but there are physical limits of luminous efficiency. Combination of white LED with blue LED chip and phosphor, its physical limit is about 230lm/W. Germany OSRAM Opto Semiconductors to participate in the exhibition theme speech (OSRAM Opto Semiconductors GmbH) president and CEO Aldo Kamper on luminous efficiency in the speech, said in a physical limit before the arrival will first face the cost limit. Although the luminous efficiency of white LED in the future will continue to improve, but in order to achieve high luminous efficiency, will significantly increase the cost of production, in the face of economic limits. Aldo Kamper believes that development of luminous efficiency in 2020 will reach the economic limit. For LED manufacturers, in order to reduce the unit price per unit brightness, in addition to improving the luminous efficiency in the future, from the LED chip to the low cost of packaging will also be increasingly important.