Abstract

We established a model for spectra of LEDs at different drive currents. The simulation program of color rendering of white-light LED clusters has been developed, according to the principle of additive color mixture. The experimental results show that white/red LED clusters can realize color temperature untunable white light with a high color rendering index and high luminous efficacy and that neutral-white/red/blue LED clusters can realize color temperature tunable white light with a high color rendering index and high luminous efficacy.

© 2010 Optical Society of America

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  1. B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
    [CrossRef]
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    [CrossRef] [PubMed]
  3. G. Cheng, M. Mazzeo, S. D’Agostino, F. D. Sala, S. Carallo, and G. Gigli, Opt. Lett. 35, 616 (2010).
    [CrossRef] [PubMed]
  4. Y. Ohno, Proc. SPIE 5530, 88 (2004).
    [CrossRef]
  5. S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
    [CrossRef]
  6. K. Man and I. Ashdown, Proc. SPIE 6337, 633702 (2006).
    [CrossRef]
  7. I. Speier and M. Salsbury, Proc. SPIE 6337, 63371F(2006).
    [CrossRef]
  8. M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).
  9. N. Narendran and Y. Gu, J. Display Technology 1, 167 (2005).
    [CrossRef]
  10. G. O. Mueller and R. Mueller-Mach, Proc. SPIE 4776, 122 (2002).
    [CrossRef]

2010 (1)

2009 (1)

2006 (2)

K. Man and I. Ashdown, Proc. SPIE 6337, 633702 (2006).
[CrossRef]

I. Speier and M. Salsbury, Proc. SPIE 6337, 63371F(2006).
[CrossRef]

2005 (3)

M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).

N. Narendran and Y. Gu, J. Display Technology 1, 167 (2005).
[CrossRef]

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

2004 (1)

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

2002 (1)

G. O. Mueller and R. Mueller-Mach, Proc. SPIE 4776, 122 (2002).
[CrossRef]

2001 (1)

B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
[CrossRef]

Ashdown, I.

K. Man and I. Ashdown, Proc. SPIE 6337, 633702 (2006).
[CrossRef]

Bierman, A.

M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).

Carallo, S.

Cheng, G.

Chhajed, S.

R. Mirhosseini, M. F. Schubert, S. Chhajed, J. Cho, J. K. Kim, and E. F. Schubert, Opt. Express 17, 10806 (2009).
[CrossRef] [PubMed]

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

Cho, J.

D’Agostino, S.

Damilano, B.

B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
[CrossRef]

Dyble, M.

M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).

Gessmann, T.

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

Gigli, G.

Grandjean, N.

B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
[CrossRef]

Gu, Y.

N. Narendran and Y. Gu, J. Display Technology 1, 167 (2005).
[CrossRef]

Kim, J. K.

Klein, T.

M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).

Li, Y. L.

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

Man, K.

K. Man and I. Ashdown, Proc. SPIE 6337, 633702 (2006).
[CrossRef]

Massies, J.

B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
[CrossRef]

Mazzeo, M.

Mirhosseini, R.

Mueller, G. O.

G. O. Mueller and R. Mueller-Mach, Proc. SPIE 4776, 122 (2002).
[CrossRef]

Mueller-Mach, R.

G. O. Mueller and R. Mueller-Mach, Proc. SPIE 4776, 122 (2002).
[CrossRef]

Narendran, N.

N. Narendran and Y. Gu, J. Display Technology 1, 167 (2005).
[CrossRef]

M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).

Ohno, Y.

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

Pernot, C.

B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
[CrossRef]

Sala, F. D.

Salsbury, M.

I. Speier and M. Salsbury, Proc. SPIE 6337, 63371F(2006).
[CrossRef]

Schubert, E. F.

R. Mirhosseini, M. F. Schubert, S. Chhajed, J. Cho, J. K. Kim, and E. F. Schubert, Opt. Express 17, 10806 (2009).
[CrossRef] [PubMed]

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

Schubert, M. F.

Speier, I.

I. Speier and M. Salsbury, Proc. SPIE 6337, 63371F(2006).
[CrossRef]

Xi, Y.

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

J. Appl. Phys. (1)

S. Chhajed, Y. Xi, Y. L. Li, T. Gessmann, and E. F. Schubert, J. Appl. Phys. 97, 054506 (2005).
[CrossRef]

J. Display Technology (1)

N. Narendran and Y. Gu, J. Display Technology 1, 167 (2005).
[CrossRef]

Jpn. J. Appl. Phys. Part 2 (1)

B. Damilano, N. Grandjean, C. Pernot, and J. Massies, Jpn. J. Appl. Phys. Part 2 40, L918 (2001).
[CrossRef]

Opt. Express (1)

Opt. Lett. (1)

Proc. SPIE (5)

G. O. Mueller and R. Mueller-Mach, Proc. SPIE 4776, 122 (2002).
[CrossRef]

K. Man and I. Ashdown, Proc. SPIE 6337, 633702 (2006).
[CrossRef]

I. Speier and M. Salsbury, Proc. SPIE 6337, 63371F(2006).
[CrossRef]

M. Dyble, N. Narendran, A. Bierman, and T. Klein, Proc. SPIE 5941, 291 (2005).

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

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Tables (3)

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Table 1 Simulation Results of W/R Clusters with CRI > 90

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Table 2 CCT (u, v), CRI, R (9–12), Φ, P in , and η of W/R Cluster at T a = 45 ° C

Tables Icon

Table 3 Predicted and Measured Results of NW/R/B Cluster at T a = 45 ° C

Equations (10)

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S LED ( λ , λ 0 , Δ λ ) = [ g ( λ , λ 0 , Δ λ ) + k 1 g ( λ , λ 0 , Δ λ ) k 2 ] / ( 1 + k 1 ) ,
g ( λ , λ 0 , Δ λ ) = exp [ ( λ λ 0 ) 2 / ( Δ λ ) 2 ] , Δ λ = { Δ λ 1 , ( λ < λ 0 ) Δ λ 2 , ( λ λ 0 ) , k i = { k i 1 , ( λ < λ 0 ) k i 2 , ( λ λ 0 ) ( i = 1 , 2 ) , λ 0 ,
λ 0 ( I F ) = A λ 0 exp ( B λ 0 I F ) + C λ 0 ,
Δ λ i ( I F ) = A Δ λ i + B Δ λ i I F ,
k i ( I F ) = A i exp ( B i I F ) + C i ,
S W ( λ ) = S B ( λ ) + S F ( λ ) ,
380 nm 475 nm [ S W ( λ ) S B ( λ ) ] 2 min .
S F ( λ , I F ) = S F ( λ , I F max ) + A F exp ( B F I F ) ,
I F ( Φ ) = k I Φ γ ( 1 + c I Φ 2 ) ,
P in ( Φ ) = k P Φ γ ( 1 + c P Φ 2 ) ,

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