Patterned structure of remote phosphor for phosphor-converted white LEDs
High efficiency white light-emitting diodes with superior color-mixing have been investigated. It is suggested that the patterned remote phosphor structure could improve the uniformity of angular-dependent correlated color temperature (CCT) and achieve high chromatic stability in wider operating cur...
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| Veröffentlicht in: | Optics express 2011-07, Vol.19 Suppl 4 (S4), p.A930-A936 |
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| container_end_page | A936 |
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| container_issue | S4 |
| container_start_page | A930 |
| container_title | Optics express |
| container_volume | 19 Suppl 4 |
| creator | Kuo, Hao-Chung Hung, Cheng-Wei Chen, Hsin-Chu Chen, Kuo-Ju Wang, Chao-Hsun Sher, Chin-Wei Yeh, Chia-Chi Lin, Chien-Chung Chen, Cheng-Huan Cheng, Yuh-Jen |
| description | High efficiency white light-emitting diodes with superior color-mixing have been investigated. It is suggested that the patterned remote phosphor structure could improve the uniformity of angular-dependent correlated color temperature (CCT) and achieve high chromatic stability in wider operating current range, as compared to the conventional remote phosphor coating structure. In this experiment, we employed a pulse spray coating method to place the patterned phosphor on the package and to leave a window region. The window area, a clear space without coating of the phosphor not only increases the extraction efficiency of blue rays at large angle, but also improves the stability of angular-dependent CCT. Moreover, the CCT deviation could be reduced from 1320 K to 266 K by this patterned remote phosphor method, and the stray blue/yellow light within the package can be effectively reduced and controlled. The design was verified both experimentally and theoretically. |
| doi_str_mv | 10.1364/OE.19.00A930 |
| format | Article |
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| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| title | Patterned structure of remote phosphor for phosphor-converted white LEDs |
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