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Improved waveguide and lighting device

A technology for illuminators and light guides, applied in the field of illuminators, can solve problems such as inability to manufacture in size, and achieve the effects of improving transparency and being easy to manufacture

Inactive Publication Date: 2009-06-17
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] While injection molded plastic bodies are suitable for lighting in vehicles, these plastic bodies cannot be manufactured in sizes suitable for luminaires
Moreover, it is difficult to make these plastic bodies transparent

Method used

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  • Improved waveguide and lighting device
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  • Improved waveguide and lighting device

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] Figure 1 shows a first embodiment comprising a light source 1 and a stack 2 consisting of flat panel light guides 3 of different sizes. This light source may be an LED, which may be a colored LED, but also a combination RGB-LED, CCFL or other type of suitable light source. Each light guide can be made from a slab made of a single dielectric material or a combination of dielectric materials. Suitable dielectric materials include various transparent materials such as various types of glass, polymethyl methacrylate (PMMA), and the like. The waveguide can also be an air waveguide which is at least partially closed by a waveguide reflector. For reasons of their functionality, waveguides comprising slabs of dielectric material may rely on total internal reflection (TIR), reflectors, or a combination of TIR and reflectors at the edges and / or top and / or bottom surfaces .

[0035] Each light guide has one edge 4 arranged to receive and in-couple light 5 from the light source ...

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PUM

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Abstract

A luminaire comprises a transparent light guiding structure (2), including a stack of transparent, flat panel light guides (3). Each panel light guide has an in-coupling edge (4) adapted to receive light from said light source and couple the light into the light guide, and at least one out-coupling surface (10, 10a) adapted to couple light out of the light guide, wherein the out-coupling surfaces is distributed along a plane of extension of said light guiding structure. The stacked light guiding structure according to the present invention is easy to manufacture even for large sizes, and consists principally of existing elements (flat panel light guides). Also, an improved transparency can be achieved with the design.

Description

technical field [0001] The invention relates to a luminaire comprising a light guide adapted to receive light from at least one light source. Background technique [0002] Flat light guides made of transparent materials such as glass or PMMA can be used to produce flat transparent luminaires, ie light sources mainly used for indoor lighting purposes. This is well known and commonly used in LCD backlights and frontlights. Light from CCFL, HCFL or LED is coupled to the light guide. Optical outcoupling structures such as wedges or suitable coatings may be placed on the surface of the light guide to remove overall internal reflective conditions to couple light out of the light guide. [0003] A problem associated with these luminaires is the uniform distribution of light coupled out of the light guide. Structures (or coatings) arranged closest to the light source tend to outcouple most of the light, while structures further from the light source tend to outcouple less light. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00F21V8/00
CPCG02B6/0038G02B6/0068G02B6/0036G02B6/00G02B6/0001
Inventor W·L·伊泽曼R·P·范戈科姆A·H·伯格曼M·C·J·M·维森伯格D·J·C·范奥尔斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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