Illuminating device

Details Illuminating device Illuminating device

2007-09-25

2009-12-08

Truong, Bao Q (Department: 2875)

Illumination

Plural light sources

Particular wavelength

C362S240000, C362S431000

Reexamination Certificate

active

07628508

ABSTRACT:
An illuminating device able to easily visualize a pedestrian, etc. on a footway by the driver of an automobile is provided. The illuminating device has a footway side light source portion for irradiating light of spectral characteristics rich in blue-green color light to the footway, and a roadway side light source portion for irradiating light of spectral characteristics rich in green-red color light to a roadway. Further, the spectral characteristics of the light irradiated from the footway side light source portion are set such that a value Ipobtained by the following formula (1) is greater than a value ICobtained by the following formula (1) from the spectral characteristics of the light irradiated from the roadway side light source portion.I=∫ab⁢S⁡(λ)·V′⁡(λ)⁢⁢ⅆλ∫380780⁢S⁡(λ)·V⁡(λ)⁢⁢ⅆλ(1)

REFERENCES:
patent: 4651260 (1987-03-01), Lasker
patent: 4701832 (1987-10-01), Lasker
patent: 6250774 (2001-06-01), Begemann et al.
patent: 6942361 (2005-09-01), Kishimura et al.
patent: 2005-158540 (2005-06-01), None

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