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Five-Surface Phosphor-in-Glass for Enhanced Illumination and Superior Color Uniformity in Large-View Scale LEDs.
Huang, Hong-Wei; Huang, Chien-Wei; Chen, Yi-Chian; Shih, Hsing-Kun; Cheng, Wei-Chih; Liu, Chun-Nien; Chiang, Chia-Chin.
Afiliación
  • Huang HW; Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan.
  • Huang CW; Department of Electrical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
  • Chen YC; Department of Occupational Safety and Hygiene, Fooyin University, Kaohsiung 831, Taiwan.
  • Shih HK; Department of Electrical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
  • Cheng WC; Department of Electrical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
  • Liu CN; Department of Electrical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
  • Chiang CC; Graduate Institute of Optoelectronic Engineering, National Chun Hsing University, Taichung 402, Taiwan.
Micromachines (Basel) ; 15(8)2024 Jul 24.
Article en En | MEDLINE | ID: mdl-39203597
ABSTRACT
A novel five-surface phosphor-in-glass (FS-PiG) structure for high illumination and excellent color uniformity in large-view scale LEDs for sensor light source application is demonstrated. YAG phosphor (Y3Al5O12Ce3+) was uniformly mixed with ceramic and sintered at 680 °C to form a phosphor wafer. Sophisticated laser engraving was employed on the phosphor wafer to form saddle-shaped large-view scale FS-PiG LEDs. The performance of the FS-PiG LEDs exhibited an illumination of 401 lm, average color temperature (CCT) of 5488 K ± 110 K, and color coordinates (CIE) of (0.3179 ± 0.003, 0.3352 ± 0.003). In contrast to convention single-surface phosphor-in-glass (SS-PiG) LEDs, the performance exhibited an illumination of 380 lm, average CCT of 5830 K ± 758 K, and CIE of (0.3083 ± 0.07, 0.3172 ± 0.07). These indicated that the performance of the FS-PiG LEDs was higher than the SS-PiG LEDs for illumination, CCT, and CIE by 1.7, 7, and 23 times, respectively. Furthermore, the FS-PiG LEDs demonstrate a lower lumen loss of 2% and a reduced chromaticity shift of 5.4 × 10-3 under accelerated aging at 350 °C for 1008 h, owing to the high ceramic melting temperature of up to 510 °C. In this study, the proposed FS-PiG large-view scale LEDs with excellent optical performance and high reliability may be promising candidates to replace the conventional phosphor-in-organic silicone material used in high-power LEDs for the next generation of sensor light sources, display, and headlight applications.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Taiwán Pais de publicación: Suiza