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Bi-chromatic illumination apparatus

A lighting device, blue technology, applied in the direction of lighting devices, lighting device components, lighting and heating equipment, etc., can solve the problems of low cost-effectiveness, huge lighting optical system, etc.

Inactive Publication Date: 2009-08-12
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large anisotropic size of LPS lamps requires bulky lighting fixture optics and the equipment is not cost effective

Method used

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  • Bi-chromatic illumination apparatus
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Embodiment Construction

[0018] definition

[0019] The term "Light Emitting Element" (LEE) is used to define a region or region of the electromagnetic spectrum that emits, for example, in the visible, infrared and / or ultraviolet regions when activated, for example by applying a potential difference across it or passing an electrical current through it Radiation equipment in combination. The light-emitting element may thus have monochromatic, quasi-monochromatic, polychromatic, or broadband spectral emission characteristics. Examples of light emitting elements include semiconductor, organic, or polymer / polymeric light emitting diodes, optically pumped phosphorescent light emitting diodes, optically pumped nanocrystal light emitting diodes, or other similar devices readily known to those of ordinary skill in the art. Furthermore, the term light-emitting element is used to define a specific device that emits radiation, such as an LED die, and can likewise be used to define a specific device that emits ...

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Abstract

The present invention provides an illumination apparatus comprising one or more first light-emitting elements and one or more second light-emitting elements and a control system configured to control the operation of the one or more first and one or more second light-emitting elements. As the illumination apparatus according to the present invention is configured to generate utility illumination using two different and substantially monochromatic light-emitting element light sources, the light pollution resulting from the utility illumination generated by the illumination apparatus is reduced, when compared to a polychromatic light source.

Description

technical field [0001] The present invention relates generally to lighting devices, and in particular to bi-color lighting devices. Background technique [0002] Many types of light sources typically operate effectively over a narrow range of operating conditions governed by the physical and chemical properties of the materials used in the light source. There are only a few types of known artificial light sources such as low pressure sodium (LPS) lamps that are both highly efficient and produce large amounts of light. Although most of these types of light sources provide only quasi-monochromatic light, they provide utility for many outdoor lighting applications. Monochromatic light from LPS lamps, for example, can provide high visual contrast at sufficiently high lighting levels, although color rendering is not possible. Unfortunately, such monochromatic light is visually unappealing, since humans often prefer white light produced by broadband spectral sources. However, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B41/36F21V7/00F21V5/00F21V9/40
CPCH05B33/0869H05B37/02H05B45/22H05B47/17H05B45/46H05B47/10
Inventor I·阿什当
Owner KONINK PHILIPS ELECTRONICS NV