Low-Flicker Lighting From High-Voltage LEDs Driven by a Single Converter-Free Driver

被引：4

作者：

Cai, Yuefei ^{[1
]}

Zou, Xinbo ^{[1
]}

Gao, Yuan ^{[1
]}

Li, Lisong ^{[1
]}

Mok, Philip K. T. ^{[1
]}

Lau, Kei May ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Hong Kong, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2017年 / 29卷 / 19期

关键词：

Converter-free driver; general illumination; high-voltage LED; low-flicker lighting; EMITTING-DIODES; PERFORMANCE; PFC;

D O I：

10.1109/LPT.2017.2742861

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter reports the design and characterization of high-power flip-chip high-voltage light-emitting diodes (HVLEDs), driven by a single converter-free LED driver for a compact and low-flicker lighting system. The HVLED chips show small forward voltage variation, uniform light emission, good optical output linearity, and stable thermal performance. All these characteristics well satisfy the demanding requirements of the novel quasi-constant power control scheme adopted in the converter-free LED driver. After bonding 12 HVLED chips (60 LED cells in total) and a single driver onto a silicon carrier through metal bonding, a low lighting flicker of 15.2%similar to 17% was demonstrated, showing great potential for high-quality illumination applications that require low flicker, high light output, and good thermal stability.

引用

页码：1675 / 1678

页数：4

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