A review on light-emitting diode based automotive headlamps

“…In particular, the demand for the LEDs in automotive applications has significantly increased during the past decade. As a result, GaN-based LEDs have been employed as daytime running lamps (DRL), rear combination lamps, turn-signal lamps, and headlamps [86,87].…”

Section: Thermal Management Of Gan-based Light-emitting Diodes For Aumentioning

confidence: 99%

Thermal Management and Characterization of High-Power Wide-Bandgap Semiconductor Electronic and Photonic Devices in Automotive Applications

Lundh

Shervin

et al. 2019

Journal of Electronic Packaging

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GaN-based high-power wide-bandgap semiconductor electronics and photonics have been considered as promising candidates to replace conventional devices for automotive applications due to high energy conversion efficiency, ruggedness, and superior transient performance. However, performance and reliability are detrimentally impacted by significant heat generation in the device active area. Therefore, thermal management plays a critical role in the development of GaN-based high-power electronic and photonic devices. This paper presents a comprehensive review of the thermal management strategies for GaN-based lateral power/RF transistors and light-emitting diodes (LEDs) reported by researchers in both industry and academia. The review is divided into three parts: (1) a survey of thermal metrology techniques, including infrared thermography, Raman thermometry, and thermoreflectance thermal imaging, that have been applied to study GaN electronics and photonics; (2) practical thermal management solutions for GaN power electronics; and (3) packaging techniques and cooling systems for GaN LEDs used in automotive lighting applications.

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“…Light‐emitting diodes (LEDs) are additional alternatives because of their relatively low manufacturing cost and high performance; they have many advantages such as energy conservation, dc driving, and high luminance. Thus, gas discharge lamps can be replaced by high‐power LEDs in high‐beam headlights …”

Section: Introductionmentioning

confidence: 99%

“…Thus, gas discharge lamps can be replaced by high-power LEDs in high-beam headlights. [4][5][6][7] A laser beam has several excellent characteristics, including high coherency, high directionality, high purity for a single color, and high optical power (OP) intensity. Therefore, several optoelectronic semiconductor manufacturers, such as Osram, Nichia, and Ushio, have been developing high-OP laser diodes, which can endure high current density.…”

Section: Introductionmentioning

confidence: 99%

Development and implementation of a laser headlight system for electro‐optic characteristic measurement and comparison

Lin

Pai

Chen

2020

Circuit Theory & Apps

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Summary In this study, a laser headlight driving controller (LHDC) using the controller area network (CAN)‐bus communication system was developed and implemented for vehicle headlight applications. To observe temperature variations that influence the forward‐bias voltage and optical power of laser diodes, the laser diode was placed in an ambient temperature‐testing chamber to measure the electro‐optic characteristics and calculate the electro‐optic conversion efficiencies. The optical power and conversion efficiency values obtained at different temperatures (from negative to positive temperatures) when optical power adjustment was executed using analog and pulse‐width modulation technologies were compared. Moreover, a human‐machine operating interface was developed using the LabVIEW software. Therefore, the LHDC and laser optical power can be controlled using a computer through the CAN‐bus communication system to control the LHDC and monitor it.

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A review on light-emitting diode based automotive headlamps

Cited by 94 publications

References 57 publications

Controll of car LED lights by CAN/LIN bus

Controll of car LED lights by CAN/LIN bus

Thermal Management and Characterization of High-Power Wide-Bandgap Semiconductor Electronic and Photonic Devices in Automotive Applications

Development and implementation of a laser headlight system for electro‐optic characteristic measurement and comparison

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