A fully-integrated compact LED module with inductor-less and capacitor-less LED driver

LEDs are highly energy efficient and have substantially longer lifetimes compared to other existing lighting technologies. In order to facilitate the new generation of LED devices, approaches to improve power efficiency with increased integration level for lighting device should be analysed. This paper proposes a fully on-chip integrated LED driver design implemented using heterogeneous integration of gallium nitride (GaN) devices atop BCD circuits. The performance of the proposed design is then compared with the conventional fully on-board integration of power devices with the LED driver integrated circuit (IC). The experimental results confirm that the fully on-chip integrated LED driver achieves a consistently higher power efficiency value compared with the fully on-board design within the input voltage range of 4.5–5.5 V. The maximal percentage improvement in the efficiency of the on-chip solution compared with the on-board solution is 18%.

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A Fully Integrated IEEE 802.15.7 Visible Light Communication Transmitter With On-Chip 8-W 85% Efficiency Boost LED Driver

Journal of Lightwave Technology ◽

10.1109/jlt.2016.2535319 ◽

2016 ◽

Vol 34 (10) ◽

pp. 2419-2430 ◽

Cited By ~ 21

Author(s):

Fengyu Che ◽

Liang Wu ◽

Babar Hussain ◽

Xianbo Li ◽

C. Patrick Yue

Keyword(s):

Visible Light ◽

Visible Light Communication ◽

Led Driver ◽

Fully Integrated ◽

On Chip

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An Auto-Zero-Voltage-Switching Quasi-Resonant LED Driver With GaN FETs and Fully Integrated LED Shunt Protectors

IEEE Journal of Solid-State Circuits ◽

10.1109/jssc.2017.2783685 ◽

2018 ◽

Vol 53 (3) ◽

pp. 913-923 ◽

Cited By ~ 5

Author(s):

Lisong Li ◽

Yuan Gao ◽

Huaxing Jiang ◽

Philip K. T. Mok ◽

Kei May Lau

Keyword(s):

Led Driver ◽

Fully Integrated ◽

Zero Voltage Switching ◽

Zero Voltage ◽

Voltage Switching

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Heterogeneous Integration of GaN and BCD Technologies

Electronics ◽

10.3390/electronics8030351 ◽

2019 ◽

Vol 8 (3) ◽

pp. 351 ◽

Cited By ~ 5

Author(s):

Mei Soh ◽

T. Teo ◽

S. Selvaraj ◽

Lulu Peng ◽

Don Disney ◽

...

Keyword(s):

Life Science ◽

Electrical Power ◽

Science Research ◽

Heterogeneous Integration ◽

Led Driver ◽

Fully Integrated ◽

Light Emitting ◽

First Case ◽

Compact Size ◽

Small Form Factor

Light-emitting diodes (LEDs) are solid-state devices that are highly energy efficient, fast switching, have a small form factor, and can emit a specific wavelength of light. The ability to precisely control the wavelength of light emitted with the fabrication process enables LEDs to not only provide illumination, but also find applications in biology and life science research. To enable the new generation of LED devices, methods to improve the energy efficiency for possible battery operation and integration level for miniaturized lighting devices should be explored. This paper presents the first case of the heterogeneous integration of gallium nitride (GaN) power devices, both GaN LED and GaN transistor, with bipolar CMOS DMOS (BCD) circuits that can achieve this. To validate this concept, an LED driver was designed, implemented and verified experimentally. It features an output electrical power of 1.36 W and compact size of 2.4 × 4.4 mm2. The designed fully integrated LED lighting device emits visible light at a wavelength of approximately 454 nm and can therefore be adopted for biology research and life science applications.

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FR-IR Molecular Microanalysis System

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100134958 ◽

1990 ◽

Vol 48 (2) ◽

pp. 270-271

Author(s):

John A. Reffner ◽

William T. Wihlborg

Keyword(s):

Fourier Transform ◽

Fourier Transform Infrared ◽

Integrated System ◽

Morphological Examination ◽

Fully Integrated ◽

Ir Microscopy ◽

Normal Functions ◽

Infrared Microspectroscopy ◽

Infrared Spectral ◽

Ft Ir

The IRμs™ is the first fully integrated system for Fourier transform infrared (FT-IR) microscopy. FT-IR microscopy combines light microscopy for morphological examination with infrared spectroscopy for chemical identification of microscopic samples or domains. Because the IRμs system is a new tool for molecular microanalysis, its optical, mechanical and system design are described to illustrate the state of development of molecular microanalysis. Applications of infrared microspectroscopy are reviewed by Messerschmidt and Harthcock.Infrared spectral analysis of microscopic samples is not a new idea, it dates back to 1949, with the first commercial instrument being offered by Perkin-Elmer Co. Inc. in 1953. These early efforts showed promise but failed the test of practically. It was not until the advances in computer science were applied did infrared microspectroscopy emerge as a useful technique. Microscopes designed as accessories for Fourier transform infrared spectrometers have been commercially available since 1983. These accessory microscopes provide the best means for analytical spectroscopists to analyze microscopic samples, while not interfering with the FT-IR spectrometer’s normal functions.

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