Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Light-Emitting Diodes |
| Untertitel | Materials, Devices, and Applications for Solid State Lighting XXII |
| Herausgeber/-innen | Michael R. Krames, Martin Strassburg, Li-Wei Tu, Jong Kyu Kim |
| Herausgeber (Verlag) | SPIE |
| ISBN (elektronisch) | 9781510615939 |
| Publikationsstatus | Veröffentlicht - 1 Feb. 2018 |
| Veranstaltung | Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII 2018 - San Francisco, USA / Vereinigte Staaten Dauer: 29 Jan. 2018 → 31 Jan. 2018 |
Publikationsreihe
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Band | 10554 |
| ISSN (Print) | 0277-786X |
| ISSN (elektronisch) | 1996-756X |
Abstract
High-resolution vehicle headlamps represent a future-oriented technology that increases traffic safety and driving comfort in the dark. A further development to current matrix beam headlamps are LED-based pixellight systems which enable additional lighting functions (e.g. the projection of navigation information on the road) to be activated for given driving scenarios. The image generation is based on spatial light modulators (SLM) such as digital micromirror devices (DMD), liquid crystal displays (LCD), liquid crystal on silicon (LCoS) devices or LED arrays. For DMD-, LCD- and LCoSbased headlamps, the optical system uses illumining optics to ensure a precise illumination of the corresponding SLM. LED arrays, however, have to use imaging optics to project the LED die onto an intermediate image plane and thus create the light distribution via an apposition of gapless juxtapositional LED die images. Nevertheless, the lambertian radiation characteristics complex the design of imaging optics regarding a highefficiency setup with maximum resolution and luminous flux. Simplifying the light source model and its emitting characteristics allows to determine a balanced setup between these parameters by using the Etendue and to calculate the maximum possible efficacy and luminous flux for each technology in an early designing stage. Therefore, we present a calculation comparison of how simplifying the light source model can affect the Etendue conservation and the setup design for two high-resolution technologies. The shown approach is evaluated and compared to simulation models to show the occurring deviation and its applicability.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Informatik (insg.)
- Angewandte Informatik
- Mathematik (insg.)
- Angewandte Mathematik
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
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- BibTex
- RIS
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII. Hrsg. / Michael R. Krames; Martin Strassburg; Li-Wei Tu; Jong Kyu Kim. SPIE, 2018. 105541O (Proceedings of SPIE - The International Society for Optical Engineering; Band 10554).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Calculation comparison of an additive and subtractive light modulator for high-resolution pixellight headlamps
AU - Held, Marcel Philipp
AU - Ley, Peer Phillip
AU - Lachmayer, Roland
N1 - Funding information: This project was funded by the Ministry of Science and Culture of Lower Saxony within the framework of the project Tailored Light.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - High-resolution vehicle headlamps represent a future-oriented technology that increases traffic safety and driving comfort in the dark. A further development to current matrix beam headlamps are LED-based pixellight systems which enable additional lighting functions (e.g. the projection of navigation information on the road) to be activated for given driving scenarios. The image generation is based on spatial light modulators (SLM) such as digital micromirror devices (DMD), liquid crystal displays (LCD), liquid crystal on silicon (LCoS) devices or LED arrays. For DMD-, LCD- and LCoSbased headlamps, the optical system uses illumining optics to ensure a precise illumination of the corresponding SLM. LED arrays, however, have to use imaging optics to project the LED die onto an intermediate image plane and thus create the light distribution via an apposition of gapless juxtapositional LED die images. Nevertheless, the lambertian radiation characteristics complex the design of imaging optics regarding a highefficiency setup with maximum resolution and luminous flux. Simplifying the light source model and its emitting characteristics allows to determine a balanced setup between these parameters by using the Etendue and to calculate the maximum possible efficacy and luminous flux for each technology in an early designing stage. Therefore, we present a calculation comparison of how simplifying the light source model can affect the Etendue conservation and the setup design for two high-resolution technologies. The shown approach is evaluated and compared to simulation models to show the occurring deviation and its applicability.
AB - High-resolution vehicle headlamps represent a future-oriented technology that increases traffic safety and driving comfort in the dark. A further development to current matrix beam headlamps are LED-based pixellight systems which enable additional lighting functions (e.g. the projection of navigation information on the road) to be activated for given driving scenarios. The image generation is based on spatial light modulators (SLM) such as digital micromirror devices (DMD), liquid crystal displays (LCD), liquid crystal on silicon (LCoS) devices or LED arrays. For DMD-, LCD- and LCoSbased headlamps, the optical system uses illumining optics to ensure a precise illumination of the corresponding SLM. LED arrays, however, have to use imaging optics to project the LED die onto an intermediate image plane and thus create the light distribution via an apposition of gapless juxtapositional LED die images. Nevertheless, the lambertian radiation characteristics complex the design of imaging optics regarding a highefficiency setup with maximum resolution and luminous flux. Simplifying the light source model and its emitting characteristics allows to determine a balanced setup between these parameters by using the Etendue and to calculate the maximum possible efficacy and luminous flux for each technology in an early designing stage. Therefore, we present a calculation comparison of how simplifying the light source model can affect the Etendue conservation and the setup design for two high-resolution technologies. The shown approach is evaluated and compared to simulation models to show the occurring deviation and its applicability.
KW - Automotive Lighting
KW - High-resolution headlamps
KW - Imaging Optics
KW - LED-based pixellight system
KW - Étendue
UR - http://www.scopus.com/inward/record.url?scp=85047825580&partnerID=8YFLogxK
U2 - 10.1117/12.2290238
DO - 10.1117/12.2290238
M3 - Conference contribution
AN - SCOPUS:85047825580
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Light-Emitting Diodes
A2 - Krames, Michael R.
A2 - Strassburg, Martin
A2 - Tu, Li-Wei
A2 - Kim, Jong Kyu
PB - SPIE
T2 - Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII 2018
Y2 - 29 January 2018 through 31 January 2018
ER -