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Proceedings Paper

Smart dimming circuit used in solid state lightings suitable for skygazer
Author(s): Keiichi Sakai
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Paper Abstract

A skygazer is an astronomical visual observer who uses telescopes in a field. The lighting for them is important. Their requirements are solid-state, light weight, flicker-less, and dimming controls corresponding to photopic, mesopic and scotopic vision. Especially, the lighting never spoils a dark adaptation at moonless night. However, bright light is used to preparing the equipment at twilight. To satisfy their requirements, we clearly define the illuminance range and its wave length, and then we propose smart dimming. The main idea is the dimming method using PAM and the implementation to MCU sharing the DC-DC converter with LEDs. The next idea is efficient use of MCU built-in components.

Paper Details

Date Published: 6 February 2012
PDF: 6 pages
Proc. SPIE 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI, 827804 (6 February 2012); doi: 10.1117/12.906293
Show Author Affiliations
Keiichi Sakai, Kochi Univ. of Technology (Japan)


Published in SPIE Proceedings Vol. 8278:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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