Advances in LEDs for automotive applications

Bhardwaj, J. K.; Peddada, R.; Spinger, Benno

doi:10.1117/12.2214205

Cited by 8 publications

(5 citation statements)

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“…At a low driving speed, the light beam is distributed to a large projection area, thereby covering a wide range of road ahead. At a high driving speed, the aperture angle of the laser beam is reduced, and the intensity of the light source and the range of illumination are increased considerably in synchronization, which is particularly helpful when driving on highways [18,19].…”

Section: Design Principle and Development Trend Of Laser Headlampsmentioning

confidence: 99%

Laser Headlamp with a Tunable Light Field

Tseng

Chen

et al. 2019

Energies

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This study developed an optical module for laser headlamps with a tunable light field. Laser headlamps have high and low beam lighting functions that are applied by changing the numbers of unit headlamps. For regulatory validation, we validated the project in accordance with the Regulation No. 112 of the Economic Commission for Europe (ECE) to determine whether the results meet the regulatory requirements or not. The proposed design increased the lighting distance by 2.14 times and decreased the size of the mechanism by 45% relative to the values for LED headlamps. High and low beam lighting functions were provided by the same laser sources.

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Section: Design Principle and Development Trend Of Laser Headlampsmentioning

confidence: 99%

Laser Headlamp with a Tunable Light Field

Tseng

Chen

et al. 2019

Energies

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“…The unit difference of energy consumption may be omitted here. More important is the fact that life-span of diode is estimated at about 100 000 hours of work, that is, pre-installed element is enough for the whole duration of exploitation of a passenger car (500 000 km of mileage with average speed 50 km/h) [9][10], whereas traditional or halogen bulbs must be replaced many times (life-span of standard bulb P21W is about 500 hours).…”

Section: Ecological and Energy Benefitsmentioning

confidence: 99%

Increasing Reduction of Co2 Emission in Hybrid Vehicles

Łukasik

Kozyra

Kuśmińska-Fijałkowska

2018

Transport Problems

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This article concerns the issue of reduction of CO 2 emission in hybrid vehicles. External lighting through LED technology was applied to show additional CO 2 savings in these vehicles. The authors propose for hybrid vehicles of M 1 category: conditions of testing external lights, research equipment with measuring system and measuring method in order to determine energy savings obtained by application of external LED light. It enables to calculate saving of CO 2 emission and estimate potential energy and ecological benefits. Computational formulas of CO 2 emission savings and calculated fuel consumption and percentage reduction of CO 2 proposed by the authors were used as a confirmation. Average worktime of lighting and three configurations of sources of lighting of hybrid vehicles were used in the analysis: halogen bulb/bulb, xenon/LED lamp and full electroluminescent external lighting.

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“…In addition, the availability of this new class of LEDs is bound to have applications in illumination. Already, automotive headlights based on matrixed arrays of small LEDs are being explored for steerable, adaptive forward lighting, improving safety for both drivers and pedestrians . Micro-LEDs will enable higher resolution and better performance for this application.…”

Section: Introductionmentioning

confidence: 99%

“…Already, automotive headlights based on matrixed arrays of small LEDs are being explored for steerable, adaptive forward lighting, improving safety for both drivers and pedestrians. 15 Micro-LEDs will enable higher resolution and better performance for this application. These products must produce white light and are being developed with YAG:Ce or LuAG:Ce in mind.…”

Section: Introductionmentioning

confidence: 99%

YAG:Ce³⁺ Phosphor: From Micron-Sized Workhorse for General Lighting to a Bright Future on the Nanoscale

Berends¹,

Haar²,

Krames³

2020

Chem. Rev.

103

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The renowned yellow phosphor yttrium aluminum garnet (YAG) doped with trivalent cerium has found its way into applications in many forms: as powder of micron sized crystals, as a ceramic, and even as a single crystal. However, additional technological advancement requires providing this material in new form factors, especially in terms of particle size. Where many materials have been developed on the nanoscale with excellent optical properties (e.g., semiconductor quantum dots, perovskite nanocrystals, and rare earth doped phosphors), it is surprising that the development of nanocrystalline YAG:Ce is not as mature as for these other materials. Control over size and shape is still in its infancy, and optical properties are not yet at the same level as other materials on the nanoscale, even though YAG:Ce microcrystalline materials exceed the performance of most other materials. This review highlights developments in synthesis methods and mechanisms and gives an overview of the state of the art morphologies, particle sizes, and optical properties of YAG:Ce on the nanoscale.

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Advances in LEDs for automotive applications

Cited by 8 publications

References 0 publications

Laser Headlamp with a Tunable Light Field

Laser Headlamp with a Tunable Light Field

Increasing Reduction of Co2 Emission in Hybrid Vehicles

YAG:Ce³⁺ Phosphor: From Micron-Sized Workhorse for General Lighting to a Bright Future on the Nanoscale

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Advances in LEDs for automotive applications

Cited by 8 publications

References 0 publications

Laser Headlamp with a Tunable Light Field

Laser Headlamp with a Tunable Light Field

Increasing Reduction of Co2 Emission in Hybrid Vehicles

YAG:Ce3+ Phosphor: From Micron-Sized Workhorse for General Lighting to a Bright Future on the Nanoscale

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Product

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About

YAG:Ce³⁺ Phosphor: From Micron-Sized Workhorse for General Lighting to a Bright Future on the Nanoscale