Spectral Design Flexibility of LED Brings Better life

Haiyan Ou (Invited author), Dennis Dan Corell (Invited author), Yiyu Ou (Invited author), Peter Behrensdorff Poulsen (Invited author), Carsten Dam-Hansen (Invited author), Paul Michael Petersen (Invited author)

    Research output: Contribution to journalConference articleResearchpeer-review


    Light-emitting diodes (LEDs) are penetrating into the huge market of general lighting because they are energy saving and environmentally friendly. The big advantage of LED light sources, compared to traditional incandescent lamps and fluorescent light tubes, is the flexible spectral design to make white light using different color mixing schemes. The spectral design flexibility of white LED light sources will promote them for novel applications to improve the life quality of human beings. As an initial exploration to make use of the spectral design flexibility, we present an example: 'no blue' white LED light source for sufferers of disease Porphyria. An LED light source prototype, made of high brightness commercial LEDs applying an optical filter, was tested by a patient suffering from Porphyria. Preliminary results have shown that the sufferer could withstand the light source for much longer time than the standard light source. At last future perspectives on spectral design flexibility of LED light sources improving human being's life will be discussed, with focus on the light and health. The good health is ensured by the spectrum optimized so that vital hormones (melatonin and serotonin) are produced during times when they support human daily rhythm.
    Original languageEnglish
    JournalProceedings of SPIE - The International Society for Optical Engineering
    Pages (from-to)827802
    Number of pages7
    Publication statusPublished - 2012
    EventSPIE Photonics West - The Moscone Center, San Francisco, California, United States
    Duration: 21 Jan 201226 Jan 2012


    ConferenceSPIE Photonics West
    LocationThe Moscone Center
    Country/TerritoryUnited States
    CitySan Francisco, California

    Bibliographical note

    Invited paper.


    • Light-emitting diode
    • Color mixing
    • Spectral design
    • Light therapy


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