EP1999406A1 - A light fitting - Google Patents
A light fittingInfo
- Publication number
- EP1999406A1 EP1999406A1 EP06824596A EP06824596A EP1999406A1 EP 1999406 A1 EP1999406 A1 EP 1999406A1 EP 06824596 A EP06824596 A EP 06824596A EP 06824596 A EP06824596 A EP 06824596A EP 1999406 A1 EP1999406 A1 EP 1999406A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- crests
- crest
- glass cover
- reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/08—Lighting devices intended for fixed installation with a standard
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/08—Refractors for light sources producing an asymmetric light distribution
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/1005—Outdoor lighting of working places, building sites or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
Definitions
- the present invention relates to a light fitting.
- light fittings or light fixtures intended for different purposes such as the illumination of roads, signs, the facades of buildings etc.
- the light fitting or light fixture is dimensioned to illuminate the intended area, which means that in addition to illuminating the area intended there is generated a large amount of stray incident light on areas outside the intended area.
- the International application PCT/SE03/01052 describes a light fitting which satisfactorily solves these two problems.
- the application describes a light fitting or light fixture that includes a light source, a reflector and a glass cover wherein the light source is of a generally punctiform configuration and wherein the reflector is designed for the emission of parallel light from the reflector.
- the surface of the glass cover includes a large number of lenses, each of which has a square or rectangular shape as seen in the direction of the light transmitted from the reflector and is adapted to diffract the asymmetry of the light so that a square or rectangular area on a surface perpendicular to the optical axis of the lens will be illuminated.
- the present invention provides a light fitting that provides much more uniform illumination of an area than conventional light fittings.
- the present invention thus relates to an illuminative light fitting that includes a light source, a reflector and a glass cover, wherein the light source has a generally punctiform configuration, wherein the surface of the glass cover includes a large number of lenses that are intended to diffract the light emitted asymmetrically so as to enable a rectangular area or a square area to be illuminated at right angles to the optical axis of a respective lens, and wherein the invention is characterized in that the glass cover includes mutually parallel and upwardly projecting crests formed by two mutually opposing side surfaces that are angled to one another; wherein each crest has a wave shape in its longitudinal direction such that the height of respective crests will vary; wherein the bottom surface between two mutually adjacent crests has a corresponding wave shape so that the height of said bottom surface will vary; wherein the width of the crest is either constant or varies at its base, causing the side
- Fig. 1 is a cross-sectional view of a light fitting according to the invention
- Fig. 2 is a cross-sectional view of a lens belonging to the light fitting
- Fig. 3 is a plan view of said lens
- Fig. 4 illustrates a first embodiment of said lens
- Fig. 5 illustrates a second embodiment of the lens
- Fig. 6 illustrates inclined crests
- FIG. 7 illustrates wave forms provided in the glass cover.
- Figure 1 illustrates a light fitting 1 which includes a light source 2, a reflector 3 and a glass cover 4.
- the light source 2 has a generally punctiform configuration.
- Preferred light sources are gas discharge lamps that have a high luminous efficiency and a concentrated discharge.
- MPXL Micro Power Xenon Light
- CDM Code Discharge Metalhalid
- These light sources have a light spectrum that lies close to that of daylight or natural light.
- the reflector 3 is parabolic so that the light outputted by the reflector will be parallel.
- the surface of the glass cover 4 includes a large number of lenses 5 which are intended to diffract the light asymmetrically such as to illuminate a rectangular square area that lies at right angles to the optical axis 6 of each lens 5.
- the lenses 5 in the glass cover include mutually parallel upwardly projecting crests 7 formed by two opposing side surfaces 8, 9 that are angled to one another.
- Each crest 7 has a wave form in the longitudinal direction of the crest such as to vary the height of respective crests.
- the bottom surface 12 between two mutually adjacent crests has a corresponding wave shape so that the height of said bottom surface will also vary. This is illustrated in figure 6.
- the width of respective crests 7 at their base 10 is either constant or varies, meaning that the side surfaces 8, 9 of the crests 7 will have a wave form corresponding to the height variations of the crests.
- Each wave section of a crest 7 therewith forms a prism for diffracting incident light from the reflector 3, wherewith the top angle of the crests 7 result in the propagation of light in a first direction and the wave form of the side surfaces 8, 9 of the crests 7 cause light to propagate in a second direction at right angles to the first direction, wherewith light from each prism illuminates a part of the illuminated surface or area.
- each side surface 8, 9 of each wave section of a crest is outwardly convex, such that said side surfaces 8, 9 will define a double- curved surface.
- the side surfaces 8, 9 of the crests have a varying inclination with regard to the surface 11 from which they project upwardly in the longitudinal direction of the crests above the surface 11 from the centre of said surface and outwardly towards the periphery 12 of the surface.
- Figure 4 shows in full lines a cross-section of a crest 7 which has a height H at its highest point.
- the figure shows in broken lines a cross-section of the same crest at a distance along the crest from the position at which the crest has its highest point, wherein the crest has a height h.
- the width of the crests 7 vary at their respective bases 10 across the surface 11 from which the crests 7 project upwards from the centre of the surface and outwards towards the periphery 12 of said surface.
- Figure 5 shows in full lines a cross-section of a crest 7 that has a highest point H.
- the figure also shows in broken lines a cross-section of the same crest at a distance along the crest from the position in which the crest is at its highest, wherein the crest has a height h.
- the height of respective crests varies along their lengths and that the base of respective crests also varies along the length of the crests.
- the crests 7 are inclined at an angle to the surface 11 from which they project and therewith are also angled to the optical axis of the light fitting, as illustrated in figure 7.
- this angle of inclination varies across the surface of the glass cover 4.
- the lenses 5 are formed by depressions in the glass cover 4.
- the reflector 3 is parabolic, as illustrated in figure 1, so that the light leaving the reflector will be parallel when it meets the glass cover.
- the parallel light meets the glass cover, the light will be given an angle of propagation in a direction of the inclination of the crests towards the incident light arriving from the reflector.
- the spreading angle of the light in a direction perpendicular to the direction just mentioned is given by the wave shape of the crest.
- the crests 7 are formed on the surface of the glass cover 4 that faces towards the light source 2.
- the crests 7 are preferably formed in the manner described above with respect to the second embodiment of the invention and illustrated in figure 5.
- the benefit obtained with this particular embodiment is that the crests are kept protected against contamination while the outer surface of the glass cover is smooth and therewith readily cleaned by weather and wind .
- the crests 7 are formed on the surface of the glass cover 4 that faces away from the light source 2.
- the crests 7 are therewith preferably formed in the manner described above with reference to the first embodiment of the invention and illustrated in figure 4.
- the first embodiment is beneficial by virtue of the fact that the angle at which the light is spread will be greater than the angle according to the second embodiment. This is because the parallel light arriving from the reflector passes through the planar inner surface of the glass cover as parallel light and is thereafter reflected towards the crests.
- the light is reflected towards the crests by a further glass volume before the light is emitted from the planar outer surface of the glass cover 4.
- angles V at which the light is spread in the case of the first embodiment may reach to about +/- 75° to the optical axis of the light fitting.
- the angles V at which the light is spread may reach to about +/- 81° to the optical axis of the light fitting.
- the present invention provides illumination with extremely high efficiency, by virtue of the fact that the optical system consisting of the lenses 5 in the form of crests 7 guides the light to the surface which is actually intended to be illuminated and therewith avoid wastage in the form of uncontrolled stray light.
- Such a light fitting or light fixture can be used for many illuminative purposes.
- the fitting can be used to illuminate the outer facades of buildings, to illuminate signs, to illuminate camera studios and for greenhouse lighting, etc.
- the invention is highly beneficial in avoiding "black holes" between the light fittings, by designing the fitting so that it will illuminate a rectangular surface area of a street or road. This enables the total lighting effect to be diminished without losing visibility
- the illustrated light fitting may have a form other than circular.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06824596T PL1999406T3 (en) | 2006-03-24 | 2006-11-30 | A light fitting |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0600675A SE0600675L (en) | 2006-03-24 | 2006-03-24 | Lighting fixture with a cover glass which includes parallel projecting cams |
PCT/SE2006/050527 WO2007111547A1 (en) | 2006-03-24 | 2006-11-30 | A light fitting |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1999406A1 true EP1999406A1 (en) | 2008-12-10 |
EP1999406A4 EP1999406A4 (en) | 2010-06-30 |
EP1999406B1 EP1999406B1 (en) | 2011-05-04 |
Family
ID=37741166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06824596A Not-in-force EP1999406B1 (en) | 2006-03-24 | 2006-11-30 | A light fitting |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1999406B1 (en) |
AT (1) | ATE508321T1 (en) |
DE (1) | DE602006021806D1 (en) |
PL (1) | PL1999406T3 (en) |
SE (1) | SE0600675L (en) |
WO (1) | WO2007111547A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0800161L (en) * | 2008-01-23 | 2008-11-18 | Prismalence Ab | Lighting equipment |
WO2010010494A1 (en) * | 2008-07-24 | 2010-01-28 | Koninklijke Philips Electronics N.V. | Luminaire device with several lighting units |
ES2345477B1 (en) * | 2009-03-17 | 2011-09-23 | Fediel System, S.L. | OPTICAL DEVICE FOR LIGHTING LAMP WITH LED. |
US8313218B2 (en) | 2009-05-25 | 2012-11-20 | Lg Innotek, Co., Ltd. | Gap member, lens and lighting device having the same |
CN101929651B (en) * | 2009-05-25 | 2016-08-03 | Lg伊诺特有限公司 | Clearance component, lens and there is the illuminator of clearance component and lens |
CN102454938A (en) * | 2011-01-04 | 2012-05-16 | 深圳市鹏之光照明科技有限公司 | Light distribution system of lamp |
WO2014083486A1 (en) * | 2012-11-30 | 2014-06-05 | Koninklijke Philips N.V. | Lighting unit, especially for road illumination |
CN105934627B (en) | 2013-10-29 | 2019-07-16 | 飞利浦灯具控股公司 | Particularly for the lighting unit of road illumination |
US20170023211A1 (en) * | 2013-12-16 | 2017-01-26 | Philips Lighting Holding B.V. | Flexible unobstructed beam shaping |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4991073A (en) * | 1989-03-08 | 1991-02-05 | Gte Products Corporation | Lighting lens |
EP0846914A1 (en) * | 1996-12-05 | 1998-06-10 | C.R.F. Società Consortile per Azioni | Lighting device for generating a rectangular pattern at the work area, e.g. for illuminating pedestrian crossings |
US5771328A (en) * | 1995-03-03 | 1998-06-23 | Minnesota Mining And Manufacturing Company | Light directing film having variable height structured surface and light directing article constructed therefrom |
WO2002023258A2 (en) * | 2000-09-14 | 2002-03-21 | 3M Innovative Properties Company | Optical sheets suitable for spreading light |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH664817A5 (en) * | 1984-10-17 | 1988-03-31 | Peter A Balla | LIGHTING FOR CLOSED RURAL SPACES. |
FR2691231B1 (en) * | 1992-05-12 | 1999-05-07 | Valeo Vision | SIDE DEVICE LIGHT FOR MOTOR VEHICLE, AND SIGNALING LIGHT INCORPORATING SAME. |
FR2731771B1 (en) * | 1995-03-13 | 1997-06-06 | Valeo Vision | SIGNAL LIGHT, PARTICULARLY FOR A MOTOR VEHICLE, PRODUCING A BEAM OF A SPECIFIC TINT AND HAVING ANOTHER TINT WHEN IT IS TURNED OFF, AND METHOD FOR MANUFACTURING THE INDICATOR OF SUCH A FIRE |
-
2006
- 2006-03-24 SE SE0600675A patent/SE0600675L/en not_active IP Right Cessation
- 2006-11-30 PL PL06824596T patent/PL1999406T3/en unknown
- 2006-11-30 DE DE602006021806T patent/DE602006021806D1/en active Active
- 2006-11-30 EP EP06824596A patent/EP1999406B1/en not_active Not-in-force
- 2006-11-30 AT AT06824596T patent/ATE508321T1/en not_active IP Right Cessation
- 2006-11-30 WO PCT/SE2006/050527 patent/WO2007111547A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4991073A (en) * | 1989-03-08 | 1991-02-05 | Gte Products Corporation | Lighting lens |
US5771328A (en) * | 1995-03-03 | 1998-06-23 | Minnesota Mining And Manufacturing Company | Light directing film having variable height structured surface and light directing article constructed therefrom |
EP0846914A1 (en) * | 1996-12-05 | 1998-06-10 | C.R.F. Società Consortile per Azioni | Lighting device for generating a rectangular pattern at the work area, e.g. for illuminating pedestrian crossings |
WO2002023258A2 (en) * | 2000-09-14 | 2002-03-21 | 3M Innovative Properties Company | Optical sheets suitable for spreading light |
Non-Patent Citations (1)
Title |
---|
See also references of WO2007111547A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1999406B1 (en) | 2011-05-04 |
EP1999406A4 (en) | 2010-06-30 |
DE602006021806D1 (en) | 2011-06-16 |
WO2007111547A1 (en) | 2007-10-04 |
PL1999406T3 (en) | 2011-10-31 |
SE528795C2 (en) | 2007-02-20 |
ATE508321T1 (en) | 2011-05-15 |
SE0600675L (en) | 2007-02-20 |
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