Abstract

We apply a microstructure array (MSA) film to improve the angular color uniformity (ACU) of a correlated-color-temperature-tunable LED (CCT-tunable LED) with tunable CCT ranging from 2700 to 6500 K. The effects of the MSA film area and the height between the film and LED are investigated and optimized. The resulting ACU is greatly improved for all CCT ranges with little luminous flux loss. For a typical CCT range of 3000-4000 K, with a full-covering MSA film and height H = 5 mm, the CCT deviation is significantly reduced from 1090 K to 218 K, with only 1.8% luminous flux loss.

© 2016 Optical Society of America

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References

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2016 (2)

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

A. Lee, H. Chen, S. C. Tan, and S. Y. R. Hui, “Precise dimming and color control of light-emitting diode systems based on color mixing,” IEEE Trans. Power Electron. 31(1), 65–80 (2016).
[Crossref]

2015 (5)

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14(5), 454–458 (2015).
[Crossref] [PubMed]

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

X. Ding, J. Li, Q. Chen, Y. Tang, Z. Li, and B. Yu, “Improving LED CCT uniformity using micropatterned films optimized by combining ray tracing and FDTD methods,” Opt. Express 23(3), A180–A191 (2015).
[Crossref] [PubMed]

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

S. Guo, S. Zhou, H. Li, and B. You, “Light diffusing films fabricated by strawberry-like PMMA/SiO2 composite microspheres for LED application,” J. Colloid Interface Sci. 448, 123–129 (2015).
[Crossref] [PubMed]

2014 (3)

M. Kim, S. M. Lee, and K. C. Choi, “Optical tuning of phosphors by plasmonic gold nanoparticles for phosphor-converted white light emitting diodes,” Appl. Phys. Lett. 105(14), 141119 (2014).
[Crossref]

C. Y. Liu, K. J. Chen, D. W. Lin, C. Y. Lee, C. C. Lin, S. H. Chien, M. H. Shih, G. C. Chi, C. Y. Chang, and H. C. Kuo, “Improvement of emission uniformity by using micro-cone patterned PDMS film,” Opt. Express 22(4), 4516–4522 (2014).
[Crossref] [PubMed]

A. T. L. Lee, J. K. O. Sin, and P. C. H. Chan, “Scalability of quasi-hysteretic FSM-based digitally controlled single-inductor dual-string buck LED driver to multiple strings,” IEEE Trans. Power Electron. 29(1), 501–513 (2014).
[Crossref]

2012 (2)

S. Li, K. Wang, F. Chen, and S. Liu, “New freeform lenses for white LEDs with high color spatial uniformity,” Opt. Express 20(22), 24418–24428 (2012).
[Crossref] [PubMed]

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

2009 (2)

L. Zongyuan, L. Sheng, W. Kai, and L. Xiaobing, “Optical Analysis of Phosphor’s Location for High-Power Light-Emitting Diodes,” IEEE Trans. Device Mater. Reliab. 9(1), 65–73 (2009).
[Crossref]

J. C. Su and C. L. Lu, “Color temperature tunable white light emitting diodes packaged with an omni-directional reflector,” Opt. Express 17(24), 21408–21413 (2009).
[Crossref] [PubMed]

2008 (1)

2007 (1)

Y. Kawaguchi, K. Nishizono, J.-S. Lee, and H. Katsuda, “Light extraction simulation of surface-textured light-emitting diodes by finite-difference time-domain method and ray-tracing method,” Jpn. J. Appl. Phys. 46, 31 (2007).

2004 (1)

2003 (1)

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

2002 (1)

D. M. Berson, F. A. Dunn, and M. Takao, “Phototransduction by retinal ganglion cells that set the circadian clock,” Science 295(5557), 1070–1073 (2002).
[Crossref] [PubMed]

Berson, D. M.

D. M. Berson, F. A. Dunn, and M. Takao, “Phototransduction by retinal ganglion cells that set the circadian clock,” Science 295(5557), 1070–1073 (2002).
[Crossref] [PubMed]

Blask, D. E.

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

Brainard, G. C.

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

Chan, P. C. H.

A. T. L. Lee, J. K. O. Sin, and P. C. H. Chan, “Scalability of quasi-hysteretic FSM-based digitally controlled single-inductor dual-string buck LED driver to multiple strings,” IEEE Trans. Power Electron. 29(1), 501–513 (2014).
[Crossref]

Chang, C. Y.

Chen, F.

Chen, H.

A. Lee, H. Chen, S. C. Tan, and S. Y. R. Hui, “Precise dimming and color control of light-emitting diode systems based on color mixing,” IEEE Trans. Power Electron. 31(1), 65–80 (2016).
[Crossref]

Chen, H. C.

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

Chen, H. M.

Chen, K. J.

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

C. Y. Liu, K. J. Chen, D. W. Lin, C. Y. Lee, C. C. Lin, S. H. Chien, M. H. Shih, G. C. Chi, C. Y. Chang, and H. C. Kuo, “Improvement of emission uniformity by using micro-cone patterned PDMS film,” Opt. Express 22(4), 4516–4522 (2014).
[Crossref] [PubMed]

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Chen, Q.

Chen, T. M.

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Chi, G. C.

Chien, S. H.

Choi, H. W.

Choi, K. C.

M. Kim, S. M. Lee, and K. C. Choi, “Optical tuning of phosphors by plasmonic gold nanoparticles for phosphor-converted white light emitting diodes,” Appl. Phys. Lett. 105(14), 141119 (2014).
[Crossref]

Dauchy, R. T.

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

Ding, W.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Ding, X.

Dunn, F. A.

D. M. Berson, F. A. Dunn, and M. Takao, “Phototransduction by retinal ganglion cells that set the circadian clock,” Science 295(5557), 1070–1073 (2002).
[Crossref] [PubMed]

Guo, M.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Guo, S.

S. Guo, S. Zhou, H. Li, and B. You, “Light diffusing films fabricated by strawberry-like PMMA/SiO2 composite microspheres for LED application,” J. Colloid Interface Sci. 448, 123–129 (2015).
[Crossref] [PubMed]

Han, H. V.

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

He, Y.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Hirosaki, N.

Hui, K. N.

Hui, S. Y. R.

A. Lee, H. Chen, S. C. Tan, and S. Y. R. Hui, “Precise dimming and color control of light-emitting diode systems based on color mixing,” IEEE Trans. Power Electron. 31(1), 65–80 (2016).
[Crossref]

Ji, X.-Y.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Jiang, X.-X.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Kai, W.

L. Zongyuan, L. Sheng, W. Kai, and L. Xiaobing, “Optical Analysis of Phosphor’s Location for High-Power Light-Emitting Diodes,” IEEE Trans. Device Mater. Reliab. 9(1), 65–73 (2009).
[Crossref]

Katsuda, H.

Y. Kawaguchi, K. Nishizono, J.-S. Lee, and H. Katsuda, “Light extraction simulation of surface-textured light-emitting diodes by finite-difference time-domain method and ray-tracing method,” Jpn. J. Appl. Phys. 46, 31 (2007).

Kawaguchi, Y.

Y. Kawaguchi, K. Nishizono, J.-S. Lee, and H. Katsuda, “Light extraction simulation of surface-textured light-emitting diodes by finite-difference time-domain method and ray-tracing method,” Jpn. J. Appl. Phys. 46, 31 (2007).

Kim, M.

M. Kim, S. M. Lee, and K. C. Choi, “Optical tuning of phosphors by plasmonic gold nanoparticles for phosphor-converted white light emitting diodes,” Appl. Phys. Lett. 105(14), 141119 (2014).
[Crossref]

Kimura, N.

Krause, J. A.

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

Kuo, H. C.

Lai, P. T.

Lee, A.

A. Lee, H. Chen, S. C. Tan, and S. Y. R. Hui, “Precise dimming and color control of light-emitting diode systems based on color mixing,” IEEE Trans. Power Electron. 31(1), 65–80 (2016).
[Crossref]

Lee, A. T. L.

A. T. L. Lee, J. K. O. Sin, and P. C. H. Chan, “Scalability of quasi-hysteretic FSM-based digitally controlled single-inductor dual-string buck LED driver to multiple strings,” IEEE Trans. Power Electron. 29(1), 501–513 (2014).
[Crossref]

Lee, C. Y.

Lee, J.-S.

Y. Kawaguchi, K. Nishizono, J.-S. Lee, and H. Katsuda, “Light extraction simulation of surface-textured light-emitting diodes by finite-difference time-domain method and ray-tracing method,” Jpn. J. Appl. Phys. 46, 31 (2007).

Lee, P. T.

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Lee, S. M.

M. Kim, S. M. Lee, and K. C. Choi, “Optical tuning of phosphors by plasmonic gold nanoparticles for phosphor-converted white light emitting diodes,” Appl. Phys. Lett. 105(14), 141119 (2014).
[Crossref]

Li, H.

S. Guo, S. Zhou, H. Li, and B. You, “Light diffusing films fabricated by strawberry-like PMMA/SiO2 composite microspheres for LED application,” J. Colloid Interface Sci. 448, 123–129 (2015).
[Crossref] [PubMed]

Li, J.

Li, J. R.

Li, Q.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Li, S.

Li, X.

Li, Y.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Li, Z.

Liao, L.-S.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Lin, C. C.

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

C. Y. Liu, K. J. Chen, D. W. Lin, C. Y. Lee, C. C. Lin, S. H. Chien, M. H. Shih, G. C. Chi, C. Y. Chang, and H. C. Kuo, “Improvement of emission uniformity by using micro-cone patterned PDMS film,” Opt. Express 22(4), 4516–4522 (2014).
[Crossref] [PubMed]

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Lin, D. W.

Lin, H. Y.

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Liu, C. Y.

Liu, S.

Liu, Y.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Lu, C. L.

Nishizono, K.

Y. Kawaguchi, K. Nishizono, J.-S. Lee, and H. Katsuda, “Light extraction simulation of surface-textured light-emitting diodes by finite-difference time-domain method and ray-tracing method,” Jpn. J. Appl. Phys. 46, 31 (2007).

Ohashi, M.

Omichi, K.

Pust, P.

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14(5), 454–458 (2015).
[Crossref] [PubMed]

Sakuma, K.

Sauer, L. A.

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

Schmidt, P. J.

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14(5), 454–458 (2015).
[Crossref] [PubMed]

Schnick, W.

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14(5), 454–458 (2015).
[Crossref] [PubMed]

Sheng, L.

L. Zongyuan, L. Sheng, W. Kai, and L. Xiaobing, “Optical Analysis of Phosphor’s Location for High-Power Light-Emitting Diodes,” IEEE Trans. Device Mater. Reliab. 9(1), 65–73 (2009).
[Crossref]

Shih, M. H.

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

C. Y. Liu, K. J. Chen, D. W. Lin, C. Y. Lee, C. C. Lin, S. H. Chien, M. H. Shih, G. C. Chi, C. Y. Chang, and H. C. Kuo, “Improvement of emission uniformity by using micro-cone patterned PDMS film,” Opt. Express 22(4), 4516–4522 (2014).
[Crossref] [PubMed]

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Sin, J. K. O.

A. T. L. Lee, J. K. O. Sin, and P. C. H. Chan, “Scalability of quasi-hysteretic FSM-based digitally controlled single-inductor dual-string buck LED driver to multiple strings,” IEEE Trans. Power Electron. 29(1), 501–513 (2014).
[Crossref]

Song, B.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Su, J. C.

Su, Y.-Y.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Suehiro, T.

Takao, M.

D. M. Berson, F. A. Dunn, and M. Takao, “Phototransduction by retinal ganglion cells that set the circadian clock,” Science 295(5557), 1070–1073 (2002).
[Crossref] [PubMed]

Tan, S. C.

A. Lee, H. Chen, S. C. Tan, and S. Y. R. Hui, “Precise dimming and color control of light-emitting diode systems based on color mixing,” IEEE Trans. Power Electron. 31(1), 65–80 (2016).
[Crossref]

Tanaka, D.

Tang, Y.

Tian, Z.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Tsai, H. H.

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

Tu, H. H.

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Tu, Z. Y.

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Wang, C. H.

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

Wang, K.

Wang, K. Y.

Wang, S. W.

H. Y. Lin, K. J. Chen, S. W. Wang, C. C. Lin, K. Y. Wang, J. R. Li, P. T. Lee, M. H. Shih, X. Li, H. M. Chen, and H. C. Kuo, “Improvement of light quality by DBR structure in white LED,” Opt. Express 23(3), A27–A33 (2015).
[Crossref] [PubMed]

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

Xiaobing, L.

L. Zongyuan, L. Sheng, W. Kai, and L. Xiaobing, “Optical Analysis of Phosphor’s Location for High-Power Light-Emitting Diodes,” IEEE Trans. Device Mater. Reliab. 9(1), 65–73 (2009).
[Crossref]

Xie, R. J.

Yamamoto, Y.

Yang, L.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Yang, X.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Yeh, C. C.

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

You, B.

S. Guo, S. Zhou, H. Li, and B. You, “Light diffusing films fabricated by strawberry-like PMMA/SiO2 composite microspheres for LED application,” J. Colloid Interface Sci. 448, 123–129 (2015).
[Crossref] [PubMed]

Yu, B.

Yun, F.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Zhang, Y.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Zheng, M.

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

Zhong, Y.-L.

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

Zhou, S.

S. Guo, S. Zhou, H. Li, and B. You, “Light diffusing films fabricated by strawberry-like PMMA/SiO2 composite microspheres for LED application,” J. Colloid Interface Sci. 448, 123–129 (2015).
[Crossref] [PubMed]

Zongyuan, L.

L. Zongyuan, L. Sheng, W. Kai, and L. Xiaobing, “Optical Analysis of Phosphor’s Location for High-Power Light-Emitting Diodes,” IEEE Trans. Device Mater. Reliab. 9(1), 65–73 (2009).
[Crossref]

Appl. Phys. Lett. (2)

L. Yang, Y. Liu, Y.-L. Zhong, X.-X. Jiang, B. Song, X.-Y. Ji, Y.-Y. Su, L.-S. Liao, and Y. He, “Fluorescent silicon nanoparticles utilized as stable color converters for white light-emitting diodes,” Appl. Phys. Lett. 106(17), 173109 (2015).
[Crossref]

M. Kim, S. M. Lee, and K. C. Choi, “Optical tuning of phosphors by plasmonic gold nanoparticles for phosphor-converted white light emitting diodes,” Appl. Phys. Lett. 105(14), 141119 (2014).
[Crossref]

Breast Cancer Res. Treat. (1)

D. E. Blask, R. T. Dauchy, L. A. Sauer, J. A. Krause, and G. C. Brainard, “Growth and fatty acid metabolism of human breast cancer (MCF-7) xenografts in nude rats: impact of constant light-induced nocturnal melatonin suppression,” Breast Cancer Res. Treat. 79(3), 313–320 (2003).
[Crossref] [PubMed]

IEEE Photonics Technol. Lett. (1)

M. Zheng, W. Ding, F. Yun, Z. Tian, Q. Li, Y. Li, M. Guo, Y. Zhang, and X. Yang, “ACU enhancement of WLEDs realized by multilayer phosphor with convex shape,” IEEE Photonics Technol. Lett. 28(2), 111–114 (2016).
[Crossref]

IEEE Trans. Device Mater. Reliab. (1)

L. Zongyuan, L. Sheng, W. Kai, and L. Xiaobing, “Optical Analysis of Phosphor’s Location for High-Power Light-Emitting Diodes,” IEEE Trans. Device Mater. Reliab. 9(1), 65–73 (2009).
[Crossref]

IEEE Trans. Power Electron. (2)

A. T. L. Lee, J. K. O. Sin, and P. C. H. Chan, “Scalability of quasi-hysteretic FSM-based digitally controlled single-inductor dual-string buck LED driver to multiple strings,” IEEE Trans. Power Electron. 29(1), 501–513 (2014).
[Crossref]

A. Lee, H. Chen, S. C. Tan, and S. Y. R. Hui, “Precise dimming and color control of light-emitting diode systems based on color mixing,” IEEE Trans. Power Electron. 31(1), 65–80 (2016).
[Crossref]

J. Colloid Interface Sci. (1)

S. Guo, S. Zhou, H. Li, and B. You, “Light diffusing films fabricated by strawberry-like PMMA/SiO2 composite microspheres for LED application,” J. Colloid Interface Sci. 448, 123–129 (2015).
[Crossref] [PubMed]

Jpn. J. Appl. Phys. (1)

Y. Kawaguchi, K. Nishizono, J.-S. Lee, and H. Katsuda, “Light extraction simulation of surface-textured light-emitting diodes by finite-difference time-domain method and ray-tracing method,” Jpn. J. Appl. Phys. 46, 31 (2007).

Microelectron. Reliab. (1)

H. C. Chen, K. J. Chen, C. C. Lin, C. H. Wang, C. C. Yeh, H. H. Tsai, M. H. Shih, and H. C. Kuo, “Improvement of lumen efficiency in white light-emitting diodes with air-gap embedded package,” Microelectron. Reliab. 52(5), 933–936 (2012).
[Crossref]

Nat. Mater. (1)

P. Pust, P. J. Schmidt, and W. Schnick, “A revolution in lighting,” Nat. Mater. 14(5), 454–458 (2015).
[Crossref] [PubMed]

Opt. Express (6)

Opt. Lett. (1)

Science (1)

D. M. Berson, F. A. Dunn, and M. Takao, “Phototransduction by retinal ganglion cells that set the circadian clock,” Science 295(5557), 1070–1073 (2002).
[Crossref] [PubMed]

Other (4)

http://www.sharp-world.com/products/device/lineup/data/pdf/datasheet/gw6tgcbg40c_e.pdf .

http://www.everlight.com/newsdetail.aspx?pcseq=4&cseq=8&seq=207 .

H. Y. Lin, S. W. Wang, C. C. Lin, K. J. Chen, H. V. Han, Z. Y. Tu, H. H. Tu, T. M. Chen, M. H. Shih, and P. T. Lee, “Excellent color quality of white light-emitting diodes by embedding quantum dots in polymers material,” IEEE J. Sel. Top. Quantum Electron.22(1), 2000107 (2015).

H. Zheng, X. Fu, R. Hu, S. Liu, and X. Luo, “Angular color uniformity improvement for phosphor-converted white light-emitting diodes by optimizing remote coating phosphor geometry,” presented at the 13th International Conference on Electronic Packaging Technology and High Density Packaging (ICEPT-HDP), 2012, 1483–1486.
[Crossref]

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Figures (6)

Fig. 1
Fig. 1 (a) Experimental design of correlated color temperature (CCT)-tunable chip on board (COB) light-emitting diode (LED). (b) Schematic of CCT-tunable LED system combined with reflector, and illustration of “blue ring.” (c) Photograph of microstructure array (MSA) optical film and scanning electron microscopy (SEM) images of the MSA. (d) Schematic illustrating CCT-tunable LED system with MSA film affixed to quartz glass covering.
Fig. 2
Fig. 2 Instrumentation system for measurement of correlated color temperature (CCT)-tunable light-emitting diode (LED).
Fig. 3
Fig. 3 (a) The CCT distribution calculated with the emission spectrum. The inset shows the spot obtained with the system without the film and fully covered with film. (b) Emission spectra at zenith angles of 30° and 55°.
Fig. 4
Fig. 4 (a) Finite-difference time-domain (FDTD) simulation setups for unit microstructure. (b) Cross-sectional electric field distributions of the microstructure.
Fig. 5
Fig. 5 (a)- (d) The correlated color temperature (CCT) distribution of system optimized by microstructure array (MSA) films with various degrees of film covering. (e) The normalized luminous intensity spatial distributions corresponding to the cool-white region (CWR) and warm-white region (WWR) in the system without MSA film. (f)-(h) The normalized luminous intensity spatial distributions corresponding to CWR and WWR in the system optimized with half-covering film, ring film, and full-covering film, respectively.
Fig. 6
Fig. 6 (a)-(f) The correlated color temperature (CCT) distribution of the system optimized with full-covering microstructure array (MSA) films with different reflector heights of H = 12.5 mm, 10 mm, 7.5 mm, 5 mm, 2.5 mm, and 1.5 mm, respectively.

Tables (1)

Tables Icon

Table 1 Change in correlated color temperature (ΔCCT) and luminous flux of the system without and with optimal film configuration for different CCT ranges

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