Automotive HID headlamps producing compact electronic ballasts using power ICs

Aoike, Nanjyo; Hoshino, M.; Iwabuchi, Akio

doi:10.1109/2943.974356

Cited by 17 publications

(5 citation statements)

References 1 publication

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“…Conventional wisdom recommends that the lamps be operated on 100-400Hz alternating rectangular current (Fig. 4) [3], [4]. The DC-AC inverter circuit has a function to invert dc current to alternating rectangular current.…”

Section: ) Dc-ac Invertermentioning

confidence: 99%

General study for design the HID ballasts

Kwok

Cheng

Dong

2006

2006 2nd International Conference on Power Electronics Systems and Applications

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Abstract--High-intensity discharge (HID) lighting lamp systems are widely used in applications that can provide a high light levels are desired for large areas, such as vehicle headlight, industrial and street lighting. Similar to fluorescent lighting systems, all HID lighting systems require a ballast to operate. Traditionally, magnetic ballast designs were the only choice available for HID lighting systems. Today, highefficiency electronic HID ballasts are available that provide improved lighting quality and reduce lighting electricity use by 10 to 30 percent.The purpose of this paper is to identify requirements of the ballast interface from the perspective of the HID lamp. This study will generally brief the starting, run-up, and steady state operation of HID lamps on electronics ballasts.

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Section: ) Dc-ac Invertermentioning

confidence: 99%

General study for design the HID ballasts

Kwok

Cheng

Dong

2006

2006 2nd International Conference on Power Electronics Systems and Applications

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“…A metal halide high‐intensity discharge lamp is a suitable replacement for conventional incandescent halogen lamps in high‐beam headlights. However, these gas discharge lamps must be incorporated with electronic ballasts for solving several problems, such as the ac driving power, negative impedance, and high‐voltage ignition . 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.…”

Section: Introductionmentioning

confidence: 99%

“…However, these gas discharge lamps must be incorporated with electronic ballasts for solving several problems, such as the ac driving power, negative impedance, and high-voltage ignition. [1][2][3] 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%

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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“…Metal halide high-intensity discharge lamps may be substituted for conventional incandescent halogen lamps for high-beam selections. These gas discharge bulbs must be used with electronic ballasts to solve several problems, including alternating-current (AC) driving, negative impedance characteristic and high-voltage ignition [1][2][3]. However, light-emitting diodes (LEDs) are another headlight selection because they have many merits, including direct-current (DC) driving, dimmable, high luminance and cost-saving.…”

Section: Introductionmentioning

confidence: 99%

Employing a Laser Headlight Electrical System to Measure and Calculate Electro-Optic Conversion Efficiencies of Blue-Beam Laser Diodes

2020

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In this study, a laser headlight electrical system was developed and implemented to measure and compare the electro-optic characteristics of the blue-beam laser diodes (BBLDs). To observe different temperatures (from negative to positive temperatures) that cause optical output power (OOP) and electrical power variations of the BBLDs, BBLDs were placed in an ambient temperature testing chamber, and the electro-optic characteristics of the BBLDs were measured to estimate the electro-optic conversion efficiencies. The different OOPs and electro-optic conversion efficiencies at different temperatures can be obtained when OOP adjustment was performed by average current and low-frequency pulse-duty cycle modulation technologies. Moreover, this study developed a human–machine interface using the LabVIEW software; therefore, the laser headlight electrical system can be controlled and monitored by a computer with the controller area network (CAN) bus communication. Finally, the prototype of the laser headlight electrical system was achieved, and three BBLDs were driven; furthermore, the white light of the headlight can be produced by mixing blue laser beams with a yellow fluorescence ceramic wafer.

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Automotive HID headlamps producing compact electronic ballasts using power ICs

Cited by 17 publications

References 1 publication

General study for design the HID ballasts

General study for design the HID ballasts

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

Employing a Laser Headlight Electrical System to Measure and Calculate Electro-Optic Conversion Efficiencies of Blue-Beam Laser Diodes

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