Abstract

In a recent paper, Park et al. [Opt. Express 20(9), 10218 (2012)] demonstrated that large micro-size cube phosphors are an outstanding potential candidate for scatter-free phosphors in white phosphor-converted light-emitting diodes (pc-LEDs). They found that large micro-size cube phosphors can lead to higher luminous efficiency (LE), higher packaging efficiency (PE), and reduced influences of ambient temperature and applied current. In this comment, we further discussed the large micro-size phosphors on the angular color uniformity (ACU). It is found that when the phosphor particle size increases from 30 μm to 100 μm, the ACU decreases from 0.91 to 0.86.

© 2013 OSA

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References

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  1. H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express20(9), 10218–10228 (2012).
    [CrossRef] [PubMed]
  2. C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
    [CrossRef]
  3. Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
    [CrossRef]
  4. R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).
  5. Z. Y. Liu, S. Liu, K. Wang, and X. B. Luo, “Measurement and numerical studies of optical properties of YAG:Ce phosphor for white light-emitting diode packaging,” Appl. Opt.49(2), 247–257 (2010).
    [CrossRef] [PubMed]
  6. R. Hu, X. B. Luo, and S. Liu, “Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation,” IEEE Photon. Technol. Lett.23(22), 1673–1675 (2011).
    [CrossRef]
  7. R. Hu, X. B. Luo, H. Zheng, Z. Qin, Z. Q. Gan, B. L. Wu, and S. Liu, “Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating,” Opt. Express20(13), 13727–13737 (2012).
    [CrossRef] [PubMed]
  8. R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
    [CrossRef]
  9. R. Hu, X. Luo, and H. Zheng, “Hotspot location shift in the high-power phosphor-converted white light-emitting diode packages,” Jpn. J. Appl. Phys.51, 09MK05 (2012).
    [CrossRef]

2012 (6)

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).

R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
[CrossRef]

R. Hu, X. Luo, and H. Zheng, “Hotspot location shift in the high-power phosphor-converted white light-emitting diode packages,” Jpn. J. Appl. Phys.51, 09MK05 (2012).
[CrossRef]

H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express20(9), 10218–10228 (2012).
[CrossRef] [PubMed]

R. Hu, X. B. Luo, H. Zheng, Z. Qin, Z. Q. Gan, B. L. Wu, and S. Liu, “Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating,” Opt. Express20(13), 13727–13737 (2012).
[CrossRef] [PubMed]

2011 (1)

R. Hu, X. B. Luo, and S. Liu, “Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation,” IEEE Photon. Technol. Lett.23(22), 1673–1675 (2011).
[CrossRef]

2010 (1)

2009 (1)

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Do, Y. R.

Feng, H.

R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
[CrossRef]

Gan, Z. Q.

Hartmann, P.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Hu, R.

R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
[CrossRef]

R. Hu, X. B. Luo, H. Zheng, Z. Qin, Z. Q. Gan, B. L. Wu, and S. Liu, “Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating,” Opt. Express20(13), 13727–13737 (2012).
[CrossRef] [PubMed]

R. Hu, X. Luo, and H. Zheng, “Hotspot location shift in the high-power phosphor-converted white light-emitting diode packages,” Jpn. J. Appl. Phys.51, 09MK05 (2012).
[CrossRef]

R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).

R. Hu, X. B. Luo, and S. Liu, “Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation,” IEEE Photon. Technol. Lett.23(22), 1673–1675 (2011).
[CrossRef]

Krenn, J. R.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Li, C.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

Liu, S.

R. Hu, X. B. Luo, H. Zheng, Z. Qin, Z. Q. Gan, B. L. Wu, and S. Liu, “Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating,” Opt. Express20(13), 13727–13737 (2012).
[CrossRef] [PubMed]

R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).

R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
[CrossRef]

R. Hu, X. B. Luo, and S. Liu, “Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation,” IEEE Photon. Technol. Lett.23(22), 1673–1675 (2011).
[CrossRef]

Z. Y. Liu, S. Liu, K. Wang, and X. B. Luo, “Measurement and numerical studies of optical properties of YAG:Ce phosphor for white light-emitting diode packaging,” Appl. Opt.49(2), 247–257 (2010).
[CrossRef] [PubMed]

Liu, Z. Y.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

Z. Y. Liu, S. Liu, K. Wang, and X. B. Luo, “Measurement and numerical studies of optical properties of YAG:Ce phosphor for white light-emitting diode packaging,” Appl. Opt.49(2), 247–257 (2010).
[CrossRef] [PubMed]

Luo, X.

R. Hu, X. Luo, and H. Zheng, “Hotspot location shift in the high-power phosphor-converted white light-emitting diode packages,” Jpn. J. Appl. Phys.51, 09MK05 (2012).
[CrossRef]

Luo, X. B.

R. Hu, X. B. Luo, H. Zheng, Z. Qin, Z. Q. Gan, B. L. Wu, and S. Liu, “Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating,” Opt. Express20(13), 13727–13737 (2012).
[CrossRef] [PubMed]

R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).

R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
[CrossRef]

R. Hu, X. B. Luo, and S. Liu, “Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation,” IEEE Photon. Technol. Lett.23(22), 1673–1675 (2011).
[CrossRef]

Z. Y. Liu, S. Liu, K. Wang, and X. B. Luo, “Measurement and numerical studies of optical properties of YAG:Ce phosphor for white light-emitting diode packaging,” Appl. Opt.49(2), 247–257 (2010).
[CrossRef] [PubMed]

Niu, H. B.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

Oh, J. H.

Pachler, P.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Park, H. K.

Qin, Z.

Schweighart, M.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Sommer, C.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Tasch, S.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Wang, K.

Wang, Y. H.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

Wenzl, F. P.

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

Wu, B. L.

Yu, B. H.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

Zheng, H.

R. Hu, X. B. Luo, H. Zheng, Z. Qin, Z. Q. Gan, B. L. Wu, and S. Liu, “Design of a novel freeform lens for LED uniform illumination and conformal phosphor coating,” Opt. Express20(13), 13727–13737 (2012).
[CrossRef] [PubMed]

R. Hu, X. Luo, and H. Zheng, “Hotspot location shift in the high-power phosphor-converted white light-emitting diode packages,” Jpn. J. Appl. Phys.51, 09MK05 (2012).
[CrossRef]

R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).

Appl. Opt. (1)

Front. Optoelectron. (1)

R. Hu, X. B. Luo, H. Zheng, and S. Liu, “Optical constants study of YAG:Ce phosphor layer blended with SiO2 particle by Mie theory for white light-emitting diode package,” Front. Optoelectron.5(2), 138–146 (2012).

IEEE J. Sel. Top. Quantum Electron. (1)

C. Sommer, J. R. Krenn, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, and F. P. Wenzl, “The effect of the phosphor particle sizes on the angular homogeneity of phosphor-converted high-power white LED light sources,” IEEE J. Sel. Top. Quantum Electron.15(4), 1181–1188 (2009).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

R. Hu, X. B. Luo, and S. Liu, “Study on the optical properties of conformal coating light-emitting diode by Monte Carlo simulation,” IEEE Photon. Technol. Lett.23(22), 1673–1675 (2011).
[CrossRef]

J. Disp. Technol. (1)

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG: Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol.8(6), 329–335 (2012).
[CrossRef]

J. Lumin. (1)

R. Hu, X. B. Luo, H. Feng, and S. Liu, “Effect of phosphor settling on the optical performance of phosphor-converted white light-emitting diodes,” J. Lumin.132(5), 1252–1256 (2012).
[CrossRef]

Jpn. J. Appl. Phys. (1)

R. Hu, X. Luo, and H. Zheng, “Hotspot location shift in the high-power phosphor-converted white light-emitting diode packages,” Jpn. J. Appl. Phys.51, 09MK05 (2012).
[CrossRef]

Opt. Express (2)

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Figures (2)

Fig. 1
Fig. 1

(a) Variation of light scattering coefficients with phosphor particle sizes and phosphor concentrations. (b) Dependence of light scattering intensity on single particle with sizes of 1μm, 30μm, and 100μm.

Fig. 2
Fig. 2

(a) Variations of CCT and ACU with changing the phosphor particle size. (b) ACU variation with changing phosphor concentration for phosphor particle sizes of 30 μm and 100 μm.

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