US5806969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting device
Assignee: Itab Industri AB
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Filing: 1996-09-13
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Granted: 1998-09-15
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Expires: 2016-09-13
Abstract
Abstract The present invention is for a lighting device by which a controlled light pattern is obtained from a specific light source. The device comprises a light source which emits several parallel light beams. There is one prism (3) for each light beam (8), which passes through the lighting device. All of the prisms are integrated parts of a common disc. Preferrably the light source comprises several light emitting diodes (1) each emitting one light beam. The prisms are suitably made as straight, circular cylinders, at least those parts thereof which protrude from the common disc. The oblique surface may be freely varied at both its angle at the axis of the cylinder and direction whereby the direction of the corresponding light beam may be controlled.
Inventors
- 👤 Lars Rosengren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:56
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/02; G; G08; G08G; G08G1/00; G08G1/09; G08G1/095; F21W; F21W2111/00; F21W2111/02; F21Y; F21Y2115/00; F21Y2115/10; Y; Y10; Y10S; Y10S362/00; Y10S362/80
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A device for obtaining a light pattern having predetermined intensity and shape, comprising: a light source, which emits several parallel light beams; a prism corresponding to each light beam through which the beam passes, all of the prisms being integral parts of a common disc, wherein the common disc has a flat surface over which the prisms are distributed and which also forms one surface of the prisms, and that the surfaces of the prisms which are oblique thereto are positioned adjacent to the opposite surface of the disc.
Claim 2
Independent Claim
89 words
A device for obtaining a light pattern having predetermined intensity and shape, comprising: a light source, which emits several parallel light beams; a prism corresponding to each light beam through which the beam passes, all of the prisms being integral parts of a common disc, wherein the common disc has a flat surface over which the prisms are distributed and which also forms one surface of the prisms, and that the surfaces of the prisms which are oblique thereto are positioned adjacent to the opposite surface of the disc.
Claim 3
Dependent Claim
39 words
A device according to claim 1, wherein each prism is a straight circular cylinder having one end surface at a right angle to the axis of the cylinder and one end surface oblique to the axis of the cylinder.
Claim 4
Dependent Claim
21 words
A device according to claim 1 or 2, wherein each prism is mounted into a corresponding hole in the common disc.
Claim 5
Dependent Claim
83 words
An illumination device, comprising: a common disc having a flat surface and a plurality of prisms distributed over said flat surface such that a surface of each of said plurality of prisms forms a part of said flat surface of said common disc; a light source disposed proximate to said common disc, wherein said light source has a plurality of light emitting elements, and each light emitting element is disposed proximate to a light receiving surface of one of said plurality of prisms.
Claim 6
Dependent Claim
83 words
An illumination device, comprising: a common disc having a flat surface and a plurality of prisms distributed over said flat surface such that a surface of each of said plurality of prisms forms a part of said flat surface of said common disc; a light source disposed proximate to said common disc, wherein said light source has a plurality of light emitting elements, and each light emitting element is disposed proximate to a light receiving surface of one of said plurality of prisms.
Claim 7
Dependent Claim
40 words
An illumination device according to claim 4, wherein substantially each prism of said plurality of prisms has one and only one closest light emitting element such that light from each light emitting element passes primarily through only one corresponding prism.
Claim 8
Dependent Claim
45 words
An illumination device according to claim 4 or 5, wherein each prism of said plurality of prisms is a straight circular cylinder having a cylinder axis which is substantially perpendicular to said surface that forms a part of said flat surface of said common disc.
Claim 9
Dependent Claim
52 words
An illumination device according to claim 6, wherein each prism of said plurality of prisms has a light receiving surface which forms an oblique angle with said cylinder axis at an opposing end of said cylinder axis from said surface that forms a part of said flat surface of said common disc.
Claim 10
Dependent Claim
21 words
An illumination device according to claim 6, wherein each prism is mounted into a corresponding hole defined by said common disc.
Claim 11
Dependent Claim
21 words
An illumination device according to claim 7, wherein each prism is mounted into a corresponding hole defined by said common disc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-14 | 2002-03-16 | 2002-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-14 | 2006-03-16 | 2006-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-14 | 2010-03-16 | 2010-09-15 | $7700.00 | Window Closed / Lapsed |