Volume 5 Issue 5
Oct.  2012
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TAN Qian, RAO Feng, ZHANG Yong-lin, XU He-chen. LED spectral model characterized by several Gaussian functions[J]. Chinese Optics, 2012, 5(5): 493-498. doi: 10.3788/CO.20120505.0493
Citation: TAN Qian, RAO Feng, ZHANG Yong-lin, XU He-chen. LED spectral model characterized by several Gaussian functions[J]. Chinese Optics, 2012, 5(5): 493-498. doi: 10.3788/CO.20120505.0493

LED spectral model characterized by several Gaussian functions

doi: 10.3788/CO.20120505.0493
  • Received Date: 21 Jun 2012
  • Rev Recd Date: 23 Aug 2012
  • Publish Date: 10 Oct 2012
  • The spectra of Light Emitting Diode (LEDs) with different colors and powers are measured with a photometric, chromatic and electric characteristic analyzer, and then a new model consisted of several Gaussian distribution functions is used to represent the spectra of LED. Meanwhile, the model coefficients are calculated through the LED spectra in a rated current. It is shown that an expression with 3n Gaussian distribution functions is proper to represent the LED's spectrum of n peaks. The errors between the established model and the actual spectra of high power LEDs of red, yellow, blue, green and white color are 3.45%, 1.01%, 2.33%, 4.65% and 2.49%, respectively. For the low-power LEDs, the errors are 2.61%, 2.65%, 3.77%, 2.87% and 2.48%, respectively. Compared with the reported models, the established model has characteristics of high precision and good universality. This study is very important to design the photometric, chromatic instruments or the intelligent products of LEDs.

     

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