Abstract

This is a comment on a previous Letter [Opt. Lett. 35, 3372 (2010)]. The chromaticity coordinates of nanocrystal quantum dot (NQD)-integrated WLED1, WLED2, and WLED3 are out of the range of the chromaticity tolerance quadrangles of white light sources. So these NQD WLEDs do not satisfy the requirements recommended for general lighting with solid-state lighting products to ensure high-quality white light. Furthermore, correlated color temperatures of WLED2 and WLED3 should be 2682 and 2527K, respectively, according to the chromaticity coordinates of WLED2 and WLED3 at 12mA, not 2781 and 2390K. The NQD-integrated WLED1 and WLED2 located in tolerance quadrangles are simulated by the changing spectral power of green-, yellow-, and orange-emitting NQDs. The simulation results are presented.

© 2011 Optical Society of America

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References

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  1. S. Nizamoglu, T. Erdem, X. W. Sun, and H. V. Demir, Opt. Lett. 35, 3372 (2010).
    [CrossRef] [PubMed]
  2. American National Standard for Electric Lamps, ANSI C78.377 (American National Standards Institute, 2008).
  3. Y. Ohno, Proc. SPIE 5530, 88 (2004).
    [CrossRef]

2010 (1)

2004 (1)

Y. Ohno, Proc. SPIE 5530, 88 (2004).
[CrossRef]

Opt. Lett. (1)

Proc. SPIE (1)

Y. Ohno, Proc. SPIE 5530, 88 (2004).
[CrossRef]

Other (1)

American National Standard for Electric Lamps, ANSI C78.377 (American National Standards Institute, 2008).

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Figures (2)

Fig. 1
Fig. 1

Predicted SPDs of WLED1.

Fig. 2
Fig. 2

Predicted SPDs of WLED2.

Tables (2)

Tables Icon

Table 1 Simulated Results of WLED1 at 2982 K

Tables Icon

Table 2 Simulated Results of WLED2 at 2682 K

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