Imaging and non-imaging illumination of a DLP for high resolution headlamps

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Ley, P.-P.; Lachmayer, R.: Imaging and non-imaging illumination of a DLP for high resolution headlamps. In: Proceedings of SPIE 10931 (2019), 109320O. DOI: https://doi.org/10.1117/12.2507436

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/9413

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Sum total of downloads: 263




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Abstract: 
Matrix-LED systems offer different functionalities to increase road safety, e.g. glare-free high beam and marking light. Shortly after their introduction, efforts have been made to increase the amount of pixels. One of the results is the EVIYOS LED consisting of 1024 individually controllable pixels, which practically set the stage for pixel light systems. Current efforts to implement high-resolution pixel light systems are focused towards the exploration of an efficient light source in combination with the use of spatial light modulators. One approach to implement high-resolution pixel light systems is the use of LED arrays as a light source to illuminate a DLP. Unlike video projectors which require a homogeneous illumination of the DLP in order to obtain a homogeneous projection, headlamps require an inhomogeneous light distribution with high illuminance in the center. In order to receive a high system efficiency preforming the desired illuminance onto the active area of the modulator is advantageous. To further increase the systems efficiency an imaging illumination of the DLP, where the images of the emission surfaces of the LEDs are superposed onto the active area of the DLP, is worthwhile. In this paper, concepts for imaging and non-imaging illumination strategies of a DLP for high resolution headlamps will be introduced. For both illumination strategies the most promising concept will be selected to set up an optical system to illuminate a DLP. The paper concludes with a comparative analysis of the imaging and non-imaging optical system with regards to the system architecture and system efficiency.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2019
Appears in Collections:Fakultät für Maschinenbau

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downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 85 32.32%
2 image of flag of United States United States 44 16.73%
3 image of flag of China China 31 11.79%
4 image of flag of Korea, Republic of Korea, Republic of 14 5.32%
5 image of flag of Taiwan Taiwan 13 4.94%
6 image of flag of France France 12 4.56%
7 image of flag of Japan Japan 8 3.04%
8 image of flag of Hong Kong Hong Kong 8 3.04%
9 image of flag of India India 7 2.66%
10 image of flag of Czech Republic Czech Republic 7 2.66%
    other countries 34 12.93%

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