Better color distribution uniformity and higher luminous intensity for LED by using a three-layered remote phosphor structure

• Autorzy: Loan Nguyen Thi Phuong , Anh Nguyen Doan Quoc , Trang Nguyen Cong , Lee Hsiao-Yi

Identyfikatory

DOI

10.2478/msp-2022-0010

• Języki publikacji: EN

Abstrakty

EN

Angular color distribution uniformity has been one of the most relevant properties in the development of white light-emitting diodes (WLEDs), since color consistency and uniformity are crucial factors in quality evaluation of a WLED. Here, particularly considering the need to overcome the poor chromaticity usually associated with WLED, we introduce a new design for the remote-phosphor package, namely a three-layered or triple-layer (TL) phosphor structure. Using three phosphor layers in packaging a WLED can result in higher color quality and luminous efficacy, compared to the double-layer (DL) configuration. In the present study, the results of using three remote phosphor layers indicate that although the structure using three layers has a lower color rendering index, the color quality scale is better than that available from the package with two layers. Additionally, the color-deviation values in the TL structure are smaller than in the dual-layer one, especially at high color temperatures (7,700 K and 8,500 K). Besides, in comparison with the DL model, the TL package increases the luminous flux by 1.4%–2%. Therefore, the TL remote phosphor structure possesses the greatest potential in enhancing the WLED quality.

Słowa kluczowe

EN

WLEDs; luminous efficacy; color uniformity; remote phosphor structure; three-layered remote phosphor structure

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2022
• Tom: Vol. 40, No. 1
• Strony: 60--67
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Loan Nguyen Thi Phuong

• Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

autor

Anh Nguyen Doan Quoc

• Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

autor

Trang Nguyen Cong

• Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

autor

Lee Hsiao-Yi

• Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan

Bibliografia

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