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US 6,639,350 B1Granted
Illumination arrangement
AssigneeZumiobel Staff GmbH
InventorGünther Sejkora
Life of this patent
Estimating the term…
Abstract
Illumination arrangement (2), profiled bodies (5) of a light permeable material being formed in a base body (4), which profiled bodies are spaced apart from one another by means of recesses (6). To each profiled body there is applied a luminous means (7) which emits light into the corresponding profiled body. The light is directed internally by the profiled body (5) to an emission surface of the base body (4) in such a manner that it emerges there within a maximum emission angle range, to avoid dazzling an observer. As luminous means (7) a flat fluorescent lamp can in particular be employed.
Claims29
An illumination arrangement comprising:
- at least one luminous source which emits light, said luminous source including at least one flat fluorescent lamp which is arranged on the upper bounding surfaces of the profiled bodies;
- a base body of a light permeable material;
- and
- profiled bodies of a light permeable material, formed in the base body, said profiled bodies being in the form of truncated pyramids or elongate strips having upper bounding surfaces and side refractive surfaces with no reflecting layers and being spaced apart from one another by means of recesses, said profiled bodies being arranged to direct light emitted from the luminous source to an emission surface of the base body from which light is emitted, the luminous source being arranged to apply light emitted therefrom exclusively onto said upper bounding surfaces of the profiled bodies and into the corresponding profiled bodies, said profiled bodies being arranged to irradiate light from said luminous source over a substantially flat emission surface of the base body, and wherein,
- the profiled bodies are so configured that they emit the light of the luminous source within a predetermined maximum angle of emission range (γmax) with regard to the normal to the emission surface of the base body,
- said profiled bodies having an index of refraction relative to the index of refraction of the luminous source, and having side surfaces at an angle with respect to said emission surface, such that light rays received at said side surfaces from said upper bounding surfaces are refracted at said side surfaces toward said emission surface and such that light rays emerging from any point on said emission surface bound in a range bounded by a conical surface extending from said emission surface and having a maximum angle of about 70° with respect to a normal to said emission surface.
3 more elements
An illumination arrangement comprising:
- at least one luminous source which emits light, said luminous source including at least one fluorescent layer which is arranged on the upper bounding surfaces of the profiled bodies;
- a base body of a light permeable material;
- profiled bodies of a light permeable material, formed in the base body, each of said profiled bodies being in the form of truncated pyramids or elongate strips having upper bounding surfaces and side refractive surfaces with no reflecting layers, and being spaced apart from one another by means of recesses, said profiled bodies being arranged to direct light emitted from the luminous source to an emission surface of the base body from which light is emitted, the luminous source being arranged to apply light emitted therefrom to upper bounding surfaces of the profiled bodies and into the corresponding profiled bodies, the fluorescent layer being applied, as a common luminous source, to the upper bounding surface of a plurality of said profiled bodies;
- and
- a light limiter arranged to ensure that irradiation of visible light from the fluorescent layer is directed exclusively onto said upper bounding surfaces of the corresponding profiled bodies,
- said light limiter including a light impermeable layer having light exit openings arranged on a light emission surface of the fluorescent layer, whereby the light exit openings are so arranged that each light exit opening coincides with a corresponding profiled body,
- said profiled bodies having an index of refraction relative to the index of refraction of the luminous source, and having side surfaces at an angle with respect to said emission surface, such that light rays received at said side surfaces from said upper bounding surfaces are refracted at said side surfaces toward said emission surface and such that light rays emerging from any point on said emission surface in a range bounded by a conical surface extending from said emission surface and having a maximum angle of about 70° with respect to a normal to said emission surface.
4 more elements
Dependencies are inferred from the claim text.