CA2565474A1 - Light fixture - Google Patents
Light fixture Download PDFInfo
- Publication number
- CA2565474A1 CA2565474A1 CA002565474A CA2565474A CA2565474A1 CA 2565474 A1 CA2565474 A1 CA 2565474A1 CA 002565474 A CA002565474 A CA 002565474A CA 2565474 A CA2565474 A CA 2565474A CA 2565474 A1 CA2565474 A1 CA 2565474A1
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- CA
- Canada
- Prior art keywords
- light
- region
- diffuser element
- light fixture
- fixture according
- 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.)
- Abandoned
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Classifications
-
- 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
- F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
-
- 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
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/02—Globes; Bowls; Cover glasses characterised by the 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
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
-
- 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
- F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
-
- 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
- F21V7/0008—Reflectors for light sources providing for indirect lighting
- F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
-
- 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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Described and shown is inter alia a light fixture (10) with a housing (11), in which a light source (15) is located and with a light outlet (23), wherein a diffuser element (18) is located in the light path between the light source and the light outlet.
The invention consists in the fact that the diffuser element for the generation of two different light cones (25, 27) has two regions (20, 21) with different transmission characteristics.
The invention consists in the fact that the diffuser element for the generation of two different light cones (25, 27) has two regions (20, 21) with different transmission characteristics.
Description
, - . .
LIGAT FIXTO'RE
The i.nvention initially relates to a.}.ight fixture according to the preamble of claim 1.
in particular the invention relates to a building light s fixture, which means a light fixture fixedly installed on a building surface or on a surface of a building that can illwninate an exterior or interior room, for example a floor area, a wall or a ceiling area. It can as well be used,- however, for the illumination of an object, for example of a piece of art.
3.0 Particularly it relates to a light fixture to be installed on the ceiling, preferably in the manner of a ceiling-mounted recessed light fixture.
Light fixtures according to the preamble of claim 1 are known and widely used. The applicant has been producing them for years. A diffuser element located in the light path between the light source and the light outlet can for example be arranged directly in the light outlet of the housing or in the light path in front of the light outlet. The diffuser element can be fozrned by a glass plate and.be provided with a certain roughness or structure so created by sand blasting'of the surface, so that the light rays are diffusely dispersed that leads to a homogenization of the light.
Broader light distribution or improved homogenization is required in many applications. Moreover, by means of the diffuser element the high luminance of the lamp can be homogenized over the whole 25 surface of the diffuser element so that the lamp e.g. cannot be that easily removed and the dazzling is reduced.
_ 1 ' A light fixture according to the preamble of claim 1 is for example described in Dg 196 32 665 Al of applicant. There, a reflector light fixture according to the type of a ceiling-mounted recessed light fixture is shown that has rotationally sysnmetric s reflector that has an lamD-holding chamber in its rear.area,*
limited by a diffusely dispersing separate flat component-designed like a pointed cone. This diffuser element is translucent,and opaque, which means milk-glass-like.
Based on this state-of-the art it is the object..of the 'so= invention to further develop a light fixture according to the preamble of claim 1 such that it has a simple design and can be variably used. This object is solved by the invention by the features of claim 1, in particular by those of the characterizing part und is Xs therefore characterized in that the diffuser element has tvo regions with different transmission characteristics for the Qeneration of two different light cones.
According-to the invention, the di.ffuser element can have two or more regions with different transmission characteristics for 20 the light emitted by the light source. Thus, at least two different light cones can be generated. The different lieht cones differ from each other both regarding the type of light and regarding the radiation angle or generally regarding their radiating characteristic. For example a first, preferably central ss or inner light cone can'be generated by a first region of the diffuser element that is for example composed of clear glass and therefore provides a direct, non-dispersed or more brilliant (so--a-t ' . called harder) light. A second, e.g. exterior light cone, generated by a second region of the diffuser element that for example is provided with a diffusely dispersing surface can generate a more diffuse, that is more homogeneous or more broadly s, dispersing light kncwn frcan comon diffuser elements and thus a light of a different type. The first,. inner cone has e.g. in total a light with higher intensity, rPhereas the second cone has a light of lower intensity.
This way the two light cones. can overlap. The first ~v inner light cone is preferably designed more narrowly radiatiag than the second, exterior light cone overlapping with the inner light cone. In the case of an overlapping of the two light cones, these two light cones are generally perceived as one joint light distribution curve, wherein the joint light cone generated by the as two light cones, that is the collective light distribution of the light fixture has a central, brighter area on its inside aind.a less bright area on its outside.
In certain applications, e.g. in sales rooms or show rooms a for example centrally located area can be more strongly 20 illuminated by the light fixture according to.the invention thanks to the light cone generated by the first region so that the- goods or exhibited objects located within this light cone are distinguished and highlighted. Around this more intensely lit area, a more ham4ogenous illumination can be provided by the second 25 light cone that generally is perceived as agreeable light. If the light fixture according to the invention is recessed in the ceiling, a more homogenous illumination that is perceived as less disturbing because of its hanogeneity but that still sufficiently lightens the room as a whole, can be achieved due to tlie different radiation angles, particularly when the distance from the floor is quite large.
s Thus, it is possible to generate tvro'differeat types of light with the light fixture according to the invention.that have different functions. This is made Dossible by one single diffuser.
element that has two different regions with differesiti. ~transmission characteristics.
io The diffuser element can be formed, for exam,ple; by a flat, planar or curved plate, particularly a glass or plastic' plate. The second region can be produced.by treating a surface region of the diffuser element or by inclusion of piyments ai similar matters. For the surface treatment of glass plates, for.
is example in order to form the. diffuser eleaient, sand blastiagi etching or other structuring surface-treatment procedures can be considered. Diffuser elements in the sense of the invention are as well such basically translucent bodies that have prisins; lenses, holographic elements Or the like and thus form a second region.
20 The first region is preferably clear, but can also have a differeat transmission characteristic, e.g. in the sense of a: focusing that differs from the trgrismission characteristic of the second region.
For exanKple, the first region can be formed by a different kind of surface-treatment method or have different prisms, different lenses 25 or different holographic elements than the second area.
The diffuser element can be color-neutral or colored.
The light fixture preferably has one single-light source that generates'both of the different light cones: Preferably noint*-tyDe light sources like (high-pressure) metal halide light fixtures, loov-voltage halide light fixtures or high-voltage halide light fixtures are used.. Likewise, also white or colored LSDI s can :.be used as light source. It is also possibie to provide several light sources.
The term light cone ia the sense of the invention means a light distribution curve with an-optional profile, e.g. in the way io of a trvncated:cone, the profile surface of which is determined both by the light outlet of the light.fixture and of.the reflector surfaces that might be provided in the housing. The light cone can have a circular-shaped profile like a truncated coae or alternatively a profile based on a traverse, e.g. a quadratic 25 profile.
The diffuser element according to the invention can also have more than tvo regions for the generation of more than two different light cones.= Preferably two regions for the generation of two different light cones are provided.
20 -From DE 196 32 665 Al of the applicant a diffuser eleaneat is already kaovrn that in the central area has a light inlet or finger opening. This is without any light-technical influence and caz,mot lead to the generation=Qf light cones.
The invention furthermore relates to a light fixture 23 according to the preamble of claim 2.
The invention again is based on the light fixture shown in FIG. 1 of DE 196 32 665 Ai, where a diffuser element is located ' .
in the light path between light source and light outlet that completely covers the light source. The term "completely.covers"
means that all the light emitted by the light source and leaving the light fixture through the light outlet must pass through the s .diffuser elemea.t. Such a diffuser element is aecessa.ry for protection when certain.light sources are used, in-particular.
point-type light sources that can rea=ch a high operational temperature. Such light sources, for example hiQh=pressure metal halide light fixtures, low-voltaga halide light ,fisctures. =or high-xo voltage.. halide light fistures have to be covered for the= protection of people in the room by at.least on complete cover.that has-no direct openings. Diffuser elements with ai finger opening as showa =
in FIGS. 2 to 4 of DE 196 32 665 Al must not be used-due=to the legal regulations for such dangerous light sources.or lamps.
is The diffuser element caaupletely covering the ,Zight.. source also has a protective function regarding light fixture defects and protects people in the room for example in case-of an explosion of the light source in case of which for example glass parts conld fly around. To achieve this protective function the diffuser.element 20 has a continuous design and completely covers the light-source.
Based on a light fixture according to the: preamble of claim 2 it is the object of this invention that the light fisture is further developed such that it has a simple design and'can be used in different applications.
25 The invention solves this object by the features of claim
LIGAT FIXTO'RE
The i.nvention initially relates to a.}.ight fixture according to the preamble of claim 1.
in particular the invention relates to a building light s fixture, which means a light fixture fixedly installed on a building surface or on a surface of a building that can illwninate an exterior or interior room, for example a floor area, a wall or a ceiling area. It can as well be used,- however, for the illumination of an object, for example of a piece of art.
3.0 Particularly it relates to a light fixture to be installed on the ceiling, preferably in the manner of a ceiling-mounted recessed light fixture.
Light fixtures according to the preamble of claim 1 are known and widely used. The applicant has been producing them for years. A diffuser element located in the light path between the light source and the light outlet can for example be arranged directly in the light outlet of the housing or in the light path in front of the light outlet. The diffuser element can be fozrned by a glass plate and.be provided with a certain roughness or structure so created by sand blasting'of the surface, so that the light rays are diffusely dispersed that leads to a homogenization of the light.
Broader light distribution or improved homogenization is required in many applications. Moreover, by means of the diffuser element the high luminance of the lamp can be homogenized over the whole 25 surface of the diffuser element so that the lamp e.g. cannot be that easily removed and the dazzling is reduced.
_ 1 ' A light fixture according to the preamble of claim 1 is for example described in Dg 196 32 665 Al of applicant. There, a reflector light fixture according to the type of a ceiling-mounted recessed light fixture is shown that has rotationally sysnmetric s reflector that has an lamD-holding chamber in its rear.area,*
limited by a diffusely dispersing separate flat component-designed like a pointed cone. This diffuser element is translucent,and opaque, which means milk-glass-like.
Based on this state-of-the art it is the object..of the 'so= invention to further develop a light fixture according to the preamble of claim 1 such that it has a simple design and can be variably used. This object is solved by the invention by the features of claim 1, in particular by those of the characterizing part und is Xs therefore characterized in that the diffuser element has tvo regions with different transmission characteristics for the Qeneration of two different light cones.
According-to the invention, the di.ffuser element can have two or more regions with different transmission characteristics for 20 the light emitted by the light source. Thus, at least two different light cones can be generated. The different lieht cones differ from each other both regarding the type of light and regarding the radiation angle or generally regarding their radiating characteristic. For example a first, preferably central ss or inner light cone can'be generated by a first region of the diffuser element that is for example composed of clear glass and therefore provides a direct, non-dispersed or more brilliant (so--a-t ' . called harder) light. A second, e.g. exterior light cone, generated by a second region of the diffuser element that for example is provided with a diffusely dispersing surface can generate a more diffuse, that is more homogeneous or more broadly s, dispersing light kncwn frcan comon diffuser elements and thus a light of a different type. The first,. inner cone has e.g. in total a light with higher intensity, rPhereas the second cone has a light of lower intensity.
This way the two light cones. can overlap. The first ~v inner light cone is preferably designed more narrowly radiatiag than the second, exterior light cone overlapping with the inner light cone. In the case of an overlapping of the two light cones, these two light cones are generally perceived as one joint light distribution curve, wherein the joint light cone generated by the as two light cones, that is the collective light distribution of the light fixture has a central, brighter area on its inside aind.a less bright area on its outside.
In certain applications, e.g. in sales rooms or show rooms a for example centrally located area can be more strongly 20 illuminated by the light fixture according to.the invention thanks to the light cone generated by the first region so that the- goods or exhibited objects located within this light cone are distinguished and highlighted. Around this more intensely lit area, a more ham4ogenous illumination can be provided by the second 25 light cone that generally is perceived as agreeable light. If the light fixture according to the invention is recessed in the ceiling, a more homogenous illumination that is perceived as less disturbing because of its hanogeneity but that still sufficiently lightens the room as a whole, can be achieved due to tlie different radiation angles, particularly when the distance from the floor is quite large.
s Thus, it is possible to generate tvro'differeat types of light with the light fixture according to the invention.that have different functions. This is made Dossible by one single diffuser.
element that has two different regions with differesiti. ~transmission characteristics.
io The diffuser element can be formed, for exam,ple; by a flat, planar or curved plate, particularly a glass or plastic' plate. The second region can be produced.by treating a surface region of the diffuser element or by inclusion of piyments ai similar matters. For the surface treatment of glass plates, for.
is example in order to form the. diffuser eleaient, sand blastiagi etching or other structuring surface-treatment procedures can be considered. Diffuser elements in the sense of the invention are as well such basically translucent bodies that have prisins; lenses, holographic elements Or the like and thus form a second region.
20 The first region is preferably clear, but can also have a differeat transmission characteristic, e.g. in the sense of a: focusing that differs from the trgrismission characteristic of the second region.
For exanKple, the first region can be formed by a different kind of surface-treatment method or have different prisms, different lenses 25 or different holographic elements than the second area.
The diffuser element can be color-neutral or colored.
The light fixture preferably has one single-light source that generates'both of the different light cones: Preferably noint*-tyDe light sources like (high-pressure) metal halide light fixtures, loov-voltage halide light fixtures or high-voltage halide light fixtures are used.. Likewise, also white or colored LSDI s can :.be used as light source. It is also possibie to provide several light sources.
The term light cone ia the sense of the invention means a light distribution curve with an-optional profile, e.g. in the way io of a trvncated:cone, the profile surface of which is determined both by the light outlet of the light.fixture and of.the reflector surfaces that might be provided in the housing. The light cone can have a circular-shaped profile like a truncated coae or alternatively a profile based on a traverse, e.g. a quadratic 25 profile.
The diffuser element according to the invention can also have more than tvo regions for the generation of more than two different light cones.= Preferably two regions for the generation of two different light cones are provided.
20 -From DE 196 32 665 Al of the applicant a diffuser eleaneat is already kaovrn that in the central area has a light inlet or finger opening. This is without any light-technical influence and caz,mot lead to the generation=Qf light cones.
The invention furthermore relates to a light fixture 23 according to the preamble of claim 2.
The invention again is based on the light fixture shown in FIG. 1 of DE 196 32 665 Ai, where a diffuser element is located ' .
in the light path between light source and light outlet that completely covers the light source. The term "completely.covers"
means that all the light emitted by the light source and leaving the light fixture through the light outlet must pass through the s .diffuser elemea.t. Such a diffuser element is aecessa.ry for protection when certain.light sources are used, in-particular.
point-type light sources that can rea=ch a high operational temperature. Such light sources, for example hiQh=pressure metal halide light fixtures, low-voltaga halide light ,fisctures. =or high-xo voltage.. halide light fistures have to be covered for the= protection of people in the room by at.least on complete cover.that has-no direct openings. Diffuser elements with ai finger opening as showa =
in FIGS. 2 to 4 of DE 196 32 665 Al must not be used-due=to the legal regulations for such dangerous light sources.or lamps.
is The diffuser element caaupletely covering the ,Zight.. source also has a protective function regarding light fixture defects and protects people in the room for example in case-of an explosion of the light source in case of which for example glass parts conld fly around. To achieve this protective function the diffuser.element 20 has a continuous design and completely covers the light-source.
Based on a light fixture according to the: preamble of claim 2 it is the object of this invention that the light fisture is further developed such that it has a simple design and'can be used in different applications.
25 The invention solves this object by the features of claim
2, particularly by the features of the characterizing part and is - S -therefore characterized in that the diffuser element has two.
regions with different transmi.ssion characteristics.
The principle of the invention 'is basically to separate a diffuser element completely covering the light sou=ce into two s regions that have different transanission characteristics. The regions with different transanission characteristics are used in the manaer explained above for the generation of two different types of lights. A first,. for exam,ple central region of the diffuser element, which means a region basically located close to the central longitudinal axis of the light fixture, can be clear, for example because q.glass plate forming the diffuser element has no treated surface in this first region.= The light passing through the first region can thus be a more brilliant light, for example for the illumination of goods or objects. The second reQion, ss particularly a region surrounding the first region like a ririg can commonly be a diffuser, for example by treating of a surface and provide a second light cone with a more homogenous light.
For better cooyprehension of the invention and also for reference to individual features reference is made to the above-zo mentioned'descriptions of claim 1 in order to avoid repetition.
The 3.nvention further relates to a light fixture according to the preamble of claim 3.
It is therefore the object of this invention, based on a light fixture according to FIG. 1 of DE 196 32 665 Al to further 25 develop a light fixture according to the preamble of claim 3 such that it has a simple design and can be used in different applications.
The object is solved in the invention by the features of claim 3, particularly by those of the characterizing part and is therefore characterized in that the diffuser'element has two reg3.ons with different transmission characteristics, whezein the rati.o of the diameter or of the breadth of the' f-irst region.to' the.
total diameter or the total breadth of the diffuser element is between 1:5 and 2:3 approximately, preferably of approximately 1s3.
The invention is basically based on the fact that' 'the , diffuser element bas two different coordinated 'reQioas that caa ..
regions with different transmi.ssion characteristics.
The principle of the invention 'is basically to separate a diffuser element completely covering the light sou=ce into two s regions that have different transanission characteristics. The regions with different transanission characteristics are used in the manaer explained above for the generation of two different types of lights. A first,. for exam,ple central region of the diffuser element, which means a region basically located close to the central longitudinal axis of the light fixture, can be clear, for example because q.glass plate forming the diffuser element has no treated surface in this first region.= The light passing through the first region can thus be a more brilliant light, for example for the illumination of goods or objects. The second reQion, ss particularly a region surrounding the first region like a ririg can commonly be a diffuser, for example by treating of a surface and provide a second light cone with a more homogenous light.
For better cooyprehension of the invention and also for reference to individual features reference is made to the above-zo mentioned'descriptions of claim 1 in order to avoid repetition.
The 3.nvention further relates to a light fixture according to the preamble of claim 3.
It is therefore the object of this invention, based on a light fixture according to FIG. 1 of DE 196 32 665 Al to further 25 develop a light fixture according to the preamble of claim 3 such that it has a simple design and can be used in different applications.
The object is solved in the invention by the features of claim 3, particularly by those of the characterizing part and is therefore characterized in that the diffuser'element has two reg3.ons with different transmission characteristics, whezein the rati.o of the diameter or of the breadth of the' f-irst region.to' the.
total diameter or the total breadth of the diffuser element is between 1:5 and 2:3 approximately, preferably of approximately 1s3.
The invention is basically based on the fact that' 'the , diffuser element bas two different coordinated 'reQioas that caa ..
3.0 , generate different types of liQht, particularly different light cones. This can be achieved by treating the.surface:of.a diffuser', element preferably designed in one piece, wherein for example.a central first region is clear and a second exterior region surrounding=the first'region like a ring has a surtace treated by sand blasting that causes a diffusing effect. zf the design is circular,.the first region. caa- hnve a first diameter and the second region can have a second diameter in , . .
case of a corresponding circular design of the whole diffuser element. The ratio of the first diameter to the second diameter is 20 between 1:5 and 20 approximately, preferably approximately 1:3.
Thus, a first region is provided with a size that aliows the generation of a respective light cone with a first type of light that differs from a second type of light of a second light cone, geaerated by the second region.
as If the first region is not circular and the diffuser element is not circular, instead of the term *diameter- the term - S -"width' is used, that is for example the edge length of the square in case of a square profile of the first region and of the whole diffuser element. Alternatively, instead of the edge length, the.
length of diagonals can be used. The ratio of the widths is as s well between approximately 1:5 and'2t3, preferably approximately 1:3. From FIGS. a to 4 of DE 196 32 665 A1 aan air inlet or finger opening is known. The ratio of the diameter or-the inner width of this finger opening to the complete inlet, however, is 1:6 19 to 1:7 and is thus significaatly smaller and not adequate for the generation of a l.ight..cone of a individually recognizable type of -light.
For better cowrehension of the invention and also for refereace to individual features reference is made to the above-is mentioned descriptions of claim 1 in order to avoid repetition.
According to an advantageous embodiment of the invention the two regions generate different types of light. For example the first region can generate a brilliant light and the second region a harmonized, more diffuse light.
20 According to a further advantageous embodiment of the invention the'two differeat types of light have differeat coordinated shielding angles. That means that the light fixture ia total can have a shielding angle of for examqple 400. In this case, a person outside of the illuminated region, in an angle of about 25 40 or less in relation to_the cei3,ing, cannot recognize the light source at all. Goods or objects located withia an e.g. 60 light cone are illuminated by the brilliant light and are thus ' 9 _ highlighted: A room region between 400 and 60 in relatiori to the ceiling is exclusively lit by the second light cone.generated by the second region and having a more homdogenous light that leads to an agreeable and more purpose oriented illumination. The numbers s indicated for the shielding angles obviously are only exempla=y'and can vary according.to the field of application. .;
The two light cones can have diÃferent -cone eingles, wherein'preferably the inner, central.first.light cone. radiates.
narrowly and has an cone angle (e.Q. according to FYG. 1-of'the.-ic present.patent application) of for example 630, whereasthe second light cone radiating a more diffuse light can have an cone angle of for exaarple 100 . The cone angle of the light cone is determined -by the geometry of the reÃlector, the diameter'or the-*idth of the first region, the.diameter or the width of the diffuser element and.
is the position of the light source.
According to a further advantageous emboda.meat of the inventions, the diffuser element is basical3.y traasluGent and can only partially disperse, direct or focus the light passing through it. The-first region of the diffuser element allows direct passage so of the light. emitted by. the light source without this light being dispersed, directed or focused, whereas the second region can have the cozmaon function of a diffuser element in the sense of light dispersion, direction or focusing.
According to a further advantageous embodi.ment of the 25 inventioa, the first region of the.diffuser element basically lets the light pass through without influencing it, wherein the second region of the diffuser element disperses the light. -This allows -the generation of a first light cone of a first type of light, for example of a harder, more brilliant light and the generation of a second light cone of a second type of light with a more homogenous light.
According to a further advantageous embodiment of the inventions, the first region of the diffuser element is basically centrally located on the diffuser element. This basically alloa~s a rotationally symmetric, in any case synnnetric design of the light fixture and the achievement of a corresponding symmetric light .10 distributioa'characteristic of the light fixture.
According to a further advantageoue embodiment of the inventions, the second region of the.diffuser element surrounds the first region like a ring. This allows a particularly simvle production of the diffuser element and a simple design, as well as fs using a reflector element located in the light path behind the diffuser: The reflector element and/or the light outlet can be adapted in their diameter to the diameter of the diffuser element.
According to-a further advantageous embodiment of the inventions, the second region of the diffuser eleaoent is obtained 20 by a surface-treatment procedure. This allows a particularly easy production of the diffuseic-element according to the invention.
According to a further advantageous embodiment of the inventions, the light source is basically point-type. Thus the light distribution curve of the light fixture can be very exactly ss predetermined.
According to a further advantageous embodiment of the inventioas, the light fixture has a reflector element. This allaas a direct light direction; particularly of the light r.egioa passi.ng through the second region of the diffuser element.
According to a further advantageous embodi.meat of the a:nventions, the reflector element is located in the light path s -between the diffuser e7.ement and the light outlet. This allows an-optimized aiming of the light. -According to a further advantaQeous embodinment-of the .inventions, the.light source is located and-.positioaed relative--to the first region of the diffUser element. that the light' reQi:ons - :.
passing through the first region, at least for the most-part,leave the light fixture by the light outlet without having been seflected.
by the reflector. Thus, the light distribution curviff of the light fixture can be further optimized.
According to a further advantageous embodiment of the xs- inven.tions,-the light source is located and positioned relative to the second region of the diffuser elememt such that the l3.ght=
regions passing through the second region, at-least for the most part, leave-the light fixture by the light.outlet only after having been reflected by the reflector. This allows a further optimized light distribution of the light fixture. =
The diffuser element can be formed-by a flat body that is planar or basically curved. This allows use of comon bodies, for example used in the state-of-the-art as cover lens, like glass plates or polyacrylic bodies or other plastic elements.
According to a further advantageous embodiment of the invention,- all the light passing through the light outlet has -passed the diffuser element before. This allows a further optimized light distribution curve of the light fixture.
Further advantages of the inventions result from the not cited dependent claims as well as frcs the following description of s the embodiments shown in the dr.aarings. Therein:
FIG. 1 is a first enbodiment of a light fixture according.
to the invention in a schematic sectional view, FIG. 2 shows the diffuser element of the light fixture all alone according to the invention in a schematic bottom view ~o according to arrow 12 in FIG. 1;
FIG. 3 shows a second embodiment of the light fixture according to the invention in a view-like FIG. 1, and FIG. 4 is the light fixture according to the invention when recessed in the ceiling with two different light cones and 13 sho.wing a person.
The light fixttire aa a whole indicated with 10 is to be described by means of FIG. 1. It should be noted that for reasons of clarity in differeat emboda.ments the same or similar parts or elements have the same reference signs in the figures, partially .ao with loarer-case letters added.
FtG: 1 shows alight fixture 1 with a longitudinal central axis L that can also be the symmetry axis of the light fixture 10. The longitudinal axis L also determines the atain radiation direction A of the light of-the light fixture and in a-25 . certain way acts as optical axis.
The light fixture 10 according to FIG. 3 can be located rotationally symmetric around its longitudinal center axis L or as is the case in the embodiment of the FIGS. 1 and be only symmetrically located to this axis and-have in total a rectaagular or rectangular periphery, maybe also a diverging shape. Preferably the light fixture has peripheries of the light outlet; the s reflector element, the diffuser-element and the outside shape 'that =
are similar to each other and of a first and a second.region as described in the following as-it is the case in the embodiments shown in the figures.
The light fixture according to.FIt#. 1 compritses.a housing ic 11, the.free marginal area 31 of which basically is flush vit'h a.
ceiling 12 of a room. The liglit fixture is thus desiQned ass.-a .
ceiling-mounted recessed light fixture. =n further unillustrated embodiments, the light fixture according to the inveation.is designed as a ceiling~mounted recessed liglat fixture or wa:ll light.
,zs fixture, a pendant light fixture or the like.
The housing 11 defines an inner a.rea 13 and a separate holding chamber 14 for holding a lamp 15 serving as light source.
Preferably point-type-light sources are used, that is such=lighti sources that oaly have a very sma11 lighted space 16, such as for 20 example metal halide light fixturee, low-voltage halide light fixtures or high-voltage halide light fixtures.
The lamp 15 is fastened in a socket 17 in an'upper housing area. Theconnection wires and maybe existing operating devices,.cooling bodies and the like are not further described.
25 The lamp-holding chamber 14 and the interior 13 of the light fixture 10 are separated from each other by a diffuser element 18. The diffuser element of the embodiment of the FIG. 1 consists of a basically rectangular, planar or flat glass plat and-is,illustrated in FIG. 2. The diffuser elesUeat 18 has a first region 20 centrally located at the inside'and with an edge length a, thus with a corresponding width a. The rectangular diffuser element 18 in total has an edge length b with a corresponding width b. The second region,21 surrounds the first region 20 like a ring, this ring also having a rectangu.lar outer periphery.
The surface 22 of the region 21 of the diffuser eleaient 18 facing the light source 15.was roughened.or structured by sand blasting or any other comopaarable surface-treatment procedure.
The diffuser element 18 with the first region 20 and the second region 21 in total has a continuous design. The hatching in FIGS. 1 and 3 of the second region 21 of the diffuser element 18 indicates different transmission characteristics. The region 21 is acts as diffuser whi.le the first region 20 is clear and has a surface 32 that is not sand-blasted facing the light source 15.
""'Coatrary to the kaooru light f isture of the FIGS. 2 to 4 of the D$
196 32 665 Al, the central first region 20 is as well part of the diffuser element 18 and consists e.g. of glass or plastic. The.
2 0 first region 20 in the embodiment of FIGS. 1 and 3 in any case is not an inlet opening, but filled with material.
The geometric configuratioa according to FIG. 1 results causes light rays emitted by the luminous volume 16 of the lamp 15 to pass partially through the firet region 20 of the diffuser 2s element 18 and directly leave the light outlet 23 of the light fixture 10 in this case withoeit having been reflected by a reflector element 19. This direct-light regions are indicated at -edge rays =24a and 24b and generate a first light =cone..25. of a first type of light, that is a more brilliant or harder light. -This light cone has a shielding angle al in relation to the ceiling 12 of about 600, for example.
s The light region of the light emitted by the.light -source_ 15 passing through the second region 21 of the diffuser' element 18 is. at first diffusely.dispersed, subsequeatly reflectea =by the inner.side of the reflector-element 19 and leaves theligrht outlet 23 of the light fixture only after reflection by.the reflector 19.
sa The exemplary light ray 28 in.F=a. 1 clarifies such.a typical. light Qath. The marginal rays of the liqht passing throuQh-the'gecond region 21 of the diffuser element 18 are indicate$-with 26a and 26b.
in FTG. 1 and define a second broader light cone 27 with aAbigger cone angle of.about 1000 that has a different type of light, namely.
is. a more hcaaogenous and more diffuse or dispersed light:. It is to be stoted that all the light regions of the light emitted by the light source passing through the second region 21 of the.-diffuser elemeat 18 are reflected by the reflector 19 and'leave the la.ght fisture 1.0 only after reflection by the reflector element 19.
20 .F1G. 4 shows a. schematic 'view of a light fixture 10 fastened at the ceiling 12 illuminating a floor area 33. The first light cone 25 that is generated by the central first-region 20 of the diffuser element 18 can generate brilliant light and distinguish, highlight or in any case brightly illuminate for 25 example an object, located on an indicated shelf 30 within the light cone 25. The second light cone 27 generating a more hcanogenous light can provide a more agreeable light'for other areas -is-of the room and for esarple lighten the regions 34a and 34b of the floor area and room regions 35a and 35b adjacent the floor area 33 xith'a more hawgenous light.
FIG. 4 clearly shows that the shielding angle a; of the s second light cone 27 is smaller and of for exanple 40 . If a person indicated with.29 in F=G. 4 is situated within the light cone 25, vvhich might not be desired and is not shown in FIG. 4 since-this light cone basically illuminates the display, good-s, ob3ects. or the like, the person would be illuminated with very intense light.:" If the.person 29 is situated within the second -light cone 27 but outside of the first light cone 25 as shown-. in ' '.Fxa. 4 the light generated by the second region 21 vould be considered as agreeable and not disturbing and the person could for example look at the display located on the shelf 30 without is disturbance and with the room being opti.mally illuminated.
If, as not shoarn in FxG. 4, the person 29 is situated-outside the second light cone 27, that.is within a smaller angle than 40 , in relation to the ceiling 12, the:person would not be blinded, as no direct sight connection to the lamp 15 is possible.
ae On the other hand, the person outside of the second light cone 27 perceives the whole room illumination as agreeable.
The degrees given for the shielding angle a1, az obviously can be optionally chosen. in the same way, a plurality of light fixtures 10 can be located on a ceiling of a building 12, the 25 individual light cones,25,.27 also overlapping if necessary, such that fox example the effect is achieved as well, that the floor surface 33 as a whole or for the most part is illuminated very -brightly and intensely with brilliant lighti and most of the room areas at a certain distance from the floor area 32,.for.example at a height of 2 m, are illuminated for the most part by more homogenous light.
= s FT(3. 3 shows a further embodiment of- the light fixture 10, according to the invention that differs from the emboiiiment of F=G: 1 basically regarding a changed design of the diffuser element 18 'that is curved, that is for example spherically arcviate. Again, an inner central first region 20. i.s provided that- basically 'lets 1.0 light pAss through without influencing it and generates:a light cone 25 an$ a second region.21 surrounding the first reQiori 20-like a ring and commonly acting as diffuser and generating a'second:light cone 27.
it should be noted that the ratio of the.width a of the as first region 20 of the diffuser elpauent 18 to the width b of the whole diffuser element 18 in the region is 1:5 to up-to:2:3. The einbodiments of the FIGS. 1 and 3 approximately shavr a ratio of the width a to the width b of the whole diffuser element 18 of about 1:3. If the diffuser element.18 is arcuate, the pidth or diameter 20 'is to be considered that part of the first region 20 that results from the projection of the'diffuser element 18 on a plaae perpendicular to the longitudinal axis L.
The transmission characteristics of the first region 20 and of the second region 21 are different insofar as the light 23 region passing through the first region 20 passes through unhindered by the light source 15, which means basically in an undirected and basically undispersed way and thus particularly the light cone is not'fanned out or focused. The second region- 21, on the other hand, should precisely serve for the harmonization, fanning out.or the direction as well as sometimes for the focusing of the light region passing through the second region 21. This s diffusing effect of the second region 21 can be achieved by treating the surface of the side 22 of the second region 21 facing the light source or alternatively by treating the'side of the.
second region 21 directed away from the light source 15.
Alternatively it is also possible that an existing diffuser elemeat lo - with for example a campletely roughened surface has a surface that.
is treated in the first region 20 such that the side 32 of the first regioa 20 facing the light source is smoothed and thus a clear-glass design of the first region 20 is obtained. In the same way pigiuents, dispersing bodies or such.like can be integrated into 15 the diffuser element 18 in the region 21 or be integrated in'the diffuser element during production.
Preferably the diffuser element 18 is produced and designed in one piece. It is also possible, however, that the diffuser element 18 consist of two pieces or elements or has an 20 opening in the,central region 20 that should be avoided for reasoas of protection and safety'particularly if the afore-mentioned point-type lamps that can reach high temperatures are used.
The second region 21 of the diffuser element 18 can be formed by lenses or prismatic elements or by holographic 25 structures. in the same way, the second regiozi 21, as well as soaaetimes also the first region 20 can be colorless or tinted or colored, wherein differently colored tints are possible, too. Both the colored tints and the diffusing effect can be achieved by-: -gluing on a foil or by fastening of cosVarable elements--on:one-exterior side of the diffuser element 18,.it being also-possible to provide the different regions 20, 21 with different foil"s'..
s The orientation and size of the f irst region= 20 is . such that light from the laup 15 caanot fall directly onathe.reflector element 19. T'hus uncontrolled reflections,can be aqoided -with a sa.mple design.
Advantageously, the first region 20 has an.outer shape K
10. cortespCnaillg-to the total outer shape G of the diffuser=element..18 or to the outear shape of the light outlet 23. It should be' noted that iiu-the embodiment of'yxG. 1 the light outlet 23 also has a rectangular shape. In the embodiment of FIG. 3 the light outlets.
23, the outer shape of the first region 20 and the outer shape of'..
as the diffuser element 18'have a circular shape.
The light source is e.g. a metal halide lazp e.g. a SIT-"-"TC=CH--according to the ZVSY-denomination {ZVE== Zentralverband der-$lektrotechnischen industrie, centrai association of the'electrical industry).
20 The first light cone 25 is preferably narrower than the light cone 27 and is completely surrounded-by.the latter..- In the area of the first light cone 25 the light is added, the light cone 25 due to the bigger luminous flux being dominated basically by the more brilliant, direct light generating starker shadows.
25 The invention makes it possible to achieve two different light qualities by means of a single light fixture and a single light source -with' a very simple design. 'ThLs way the.diffuser has two different dispersion areas.
Further additional liQht guiding or light directing elements, glasses, mirrors or the like that are not shown in the s figures can be provided on the light fixture.
case of a corresponding circular design of the whole diffuser element. The ratio of the first diameter to the second diameter is 20 between 1:5 and 20 approximately, preferably approximately 1:3.
Thus, a first region is provided with a size that aliows the generation of a respective light cone with a first type of light that differs from a second type of light of a second light cone, geaerated by the second region.
as If the first region is not circular and the diffuser element is not circular, instead of the term *diameter- the term - S -"width' is used, that is for example the edge length of the square in case of a square profile of the first region and of the whole diffuser element. Alternatively, instead of the edge length, the.
length of diagonals can be used. The ratio of the widths is as s well between approximately 1:5 and'2t3, preferably approximately 1:3. From FIGS. a to 4 of DE 196 32 665 A1 aan air inlet or finger opening is known. The ratio of the diameter or-the inner width of this finger opening to the complete inlet, however, is 1:6 19 to 1:7 and is thus significaatly smaller and not adequate for the generation of a l.ight..cone of a individually recognizable type of -light.
For better cowrehension of the invention and also for refereace to individual features reference is made to the above-is mentioned descriptions of claim 1 in order to avoid repetition.
According to an advantageous embodiment of the invention the two regions generate different types of light. For example the first region can generate a brilliant light and the second region a harmonized, more diffuse light.
20 According to a further advantageous embodiment of the invention the'two differeat types of light have differeat coordinated shielding angles. That means that the light fixture ia total can have a shielding angle of for examqple 400. In this case, a person outside of the illuminated region, in an angle of about 25 40 or less in relation to_the cei3,ing, cannot recognize the light source at all. Goods or objects located withia an e.g. 60 light cone are illuminated by the brilliant light and are thus ' 9 _ highlighted: A room region between 400 and 60 in relatiori to the ceiling is exclusively lit by the second light cone.generated by the second region and having a more homdogenous light that leads to an agreeable and more purpose oriented illumination. The numbers s indicated for the shielding angles obviously are only exempla=y'and can vary according.to the field of application. .;
The two light cones can have diÃferent -cone eingles, wherein'preferably the inner, central.first.light cone. radiates.
narrowly and has an cone angle (e.Q. according to FYG. 1-of'the.-ic present.patent application) of for example 630, whereasthe second light cone radiating a more diffuse light can have an cone angle of for exaarple 100 . The cone angle of the light cone is determined -by the geometry of the reÃlector, the diameter'or the-*idth of the first region, the.diameter or the width of the diffuser element and.
is the position of the light source.
According to a further advantageous emboda.meat of the inventions, the diffuser element is basical3.y traasluGent and can only partially disperse, direct or focus the light passing through it. The-first region of the diffuser element allows direct passage so of the light. emitted by. the light source without this light being dispersed, directed or focused, whereas the second region can have the cozmaon function of a diffuser element in the sense of light dispersion, direction or focusing.
According to a further advantageous embodi.ment of the 25 inventioa, the first region of the.diffuser element basically lets the light pass through without influencing it, wherein the second region of the diffuser element disperses the light. -This allows -the generation of a first light cone of a first type of light, for example of a harder, more brilliant light and the generation of a second light cone of a second type of light with a more homogenous light.
According to a further advantageous embodiment of the inventions, the first region of the diffuser element is basically centrally located on the diffuser element. This basically alloa~s a rotationally symmetric, in any case synnnetric design of the light fixture and the achievement of a corresponding symmetric light .10 distributioa'characteristic of the light fixture.
According to a further advantageoue embodiment of the inventions, the second region of the.diffuser element surrounds the first region like a ring. This allows a particularly simvle production of the diffuser element and a simple design, as well as fs using a reflector element located in the light path behind the diffuser: The reflector element and/or the light outlet can be adapted in their diameter to the diameter of the diffuser element.
According to-a further advantageous embodiment of the inventions, the second region of the diffuser eleaoent is obtained 20 by a surface-treatment procedure. This allows a particularly easy production of the diffuseic-element according to the invention.
According to a further advantageous embodiment of the inventions, the light source is basically point-type. Thus the light distribution curve of the light fixture can be very exactly ss predetermined.
According to a further advantageous embodiment of the inventioas, the light fixture has a reflector element. This allaas a direct light direction; particularly of the light r.egioa passi.ng through the second region of the diffuser element.
According to a further advantageous embodi.meat of the a:nventions, the reflector element is located in the light path s -between the diffuser e7.ement and the light outlet. This allows an-optimized aiming of the light. -According to a further advantaQeous embodinment-of the .inventions, the.light source is located and-.positioaed relative--to the first region of the diffUser element. that the light' reQi:ons - :.
passing through the first region, at least for the most-part,leave the light fixture by the light outlet without having been seflected.
by the reflector. Thus, the light distribution curviff of the light fixture can be further optimized.
According to a further advantageous embodiment of the xs- inven.tions,-the light source is located and positioned relative to the second region of the diffuser elememt such that the l3.ght=
regions passing through the second region, at-least for the most part, leave-the light fixture by the light.outlet only after having been reflected by the reflector. This allows a further optimized light distribution of the light fixture. =
The diffuser element can be formed-by a flat body that is planar or basically curved. This allows use of comon bodies, for example used in the state-of-the-art as cover lens, like glass plates or polyacrylic bodies or other plastic elements.
According to a further advantageous embodiment of the invention,- all the light passing through the light outlet has -passed the diffuser element before. This allows a further optimized light distribution curve of the light fixture.
Further advantages of the inventions result from the not cited dependent claims as well as frcs the following description of s the embodiments shown in the dr.aarings. Therein:
FIG. 1 is a first enbodiment of a light fixture according.
to the invention in a schematic sectional view, FIG. 2 shows the diffuser element of the light fixture all alone according to the invention in a schematic bottom view ~o according to arrow 12 in FIG. 1;
FIG. 3 shows a second embodiment of the light fixture according to the invention in a view-like FIG. 1, and FIG. 4 is the light fixture according to the invention when recessed in the ceiling with two different light cones and 13 sho.wing a person.
The light fixttire aa a whole indicated with 10 is to be described by means of FIG. 1. It should be noted that for reasons of clarity in differeat emboda.ments the same or similar parts or elements have the same reference signs in the figures, partially .ao with loarer-case letters added.
FtG: 1 shows alight fixture 1 with a longitudinal central axis L that can also be the symmetry axis of the light fixture 10. The longitudinal axis L also determines the atain radiation direction A of the light of-the light fixture and in a-25 . certain way acts as optical axis.
The light fixture 10 according to FIG. 3 can be located rotationally symmetric around its longitudinal center axis L or as is the case in the embodiment of the FIGS. 1 and be only symmetrically located to this axis and-have in total a rectaagular or rectangular periphery, maybe also a diverging shape. Preferably the light fixture has peripheries of the light outlet; the s reflector element, the diffuser-element and the outside shape 'that =
are similar to each other and of a first and a second.region as described in the following as-it is the case in the embodiments shown in the figures.
The light fixture according to.FIt#. 1 compritses.a housing ic 11, the.free marginal area 31 of which basically is flush vit'h a.
ceiling 12 of a room. The liglit fixture is thus desiQned ass.-a .
ceiling-mounted recessed light fixture. =n further unillustrated embodiments, the light fixture according to the inveation.is designed as a ceiling~mounted recessed liglat fixture or wa:ll light.
,zs fixture, a pendant light fixture or the like.
The housing 11 defines an inner a.rea 13 and a separate holding chamber 14 for holding a lamp 15 serving as light source.
Preferably point-type-light sources are used, that is such=lighti sources that oaly have a very sma11 lighted space 16, such as for 20 example metal halide light fixturee, low-voltage halide light fixtures or high-voltage halide light fixtures.
The lamp 15 is fastened in a socket 17 in an'upper housing area. Theconnection wires and maybe existing operating devices,.cooling bodies and the like are not further described.
25 The lamp-holding chamber 14 and the interior 13 of the light fixture 10 are separated from each other by a diffuser element 18. The diffuser element of the embodiment of the FIG. 1 consists of a basically rectangular, planar or flat glass plat and-is,illustrated in FIG. 2. The diffuser elesUeat 18 has a first region 20 centrally located at the inside'and with an edge length a, thus with a corresponding width a. The rectangular diffuser element 18 in total has an edge length b with a corresponding width b. The second region,21 surrounds the first region 20 like a ring, this ring also having a rectangu.lar outer periphery.
The surface 22 of the region 21 of the diffuser eleaient 18 facing the light source 15.was roughened.or structured by sand blasting or any other comopaarable surface-treatment procedure.
The diffuser element 18 with the first region 20 and the second region 21 in total has a continuous design. The hatching in FIGS. 1 and 3 of the second region 21 of the diffuser element 18 indicates different transmission characteristics. The region 21 is acts as diffuser whi.le the first region 20 is clear and has a surface 32 that is not sand-blasted facing the light source 15.
""'Coatrary to the kaooru light f isture of the FIGS. 2 to 4 of the D$
196 32 665 Al, the central first region 20 is as well part of the diffuser element 18 and consists e.g. of glass or plastic. The.
2 0 first region 20 in the embodiment of FIGS. 1 and 3 in any case is not an inlet opening, but filled with material.
The geometric configuratioa according to FIG. 1 results causes light rays emitted by the luminous volume 16 of the lamp 15 to pass partially through the firet region 20 of the diffuser 2s element 18 and directly leave the light outlet 23 of the light fixture 10 in this case withoeit having been reflected by a reflector element 19. This direct-light regions are indicated at -edge rays =24a and 24b and generate a first light =cone..25. of a first type of light, that is a more brilliant or harder light. -This light cone has a shielding angle al in relation to the ceiling 12 of about 600, for example.
s The light region of the light emitted by the.light -source_ 15 passing through the second region 21 of the diffuser' element 18 is. at first diffusely.dispersed, subsequeatly reflectea =by the inner.side of the reflector-element 19 and leaves theligrht outlet 23 of the light fixture only after reflection by.the reflector 19.
sa The exemplary light ray 28 in.F=a. 1 clarifies such.a typical. light Qath. The marginal rays of the liqht passing throuQh-the'gecond region 21 of the diffuser element 18 are indicate$-with 26a and 26b.
in FTG. 1 and define a second broader light cone 27 with aAbigger cone angle of.about 1000 that has a different type of light, namely.
is. a more hcaaogenous and more diffuse or dispersed light:. It is to be stoted that all the light regions of the light emitted by the light source passing through the second region 21 of the.-diffuser elemeat 18 are reflected by the reflector 19 and'leave the la.ght fisture 1.0 only after reflection by the reflector element 19.
20 .F1G. 4 shows a. schematic 'view of a light fixture 10 fastened at the ceiling 12 illuminating a floor area 33. The first light cone 25 that is generated by the central first-region 20 of the diffuser element 18 can generate brilliant light and distinguish, highlight or in any case brightly illuminate for 25 example an object, located on an indicated shelf 30 within the light cone 25. The second light cone 27 generating a more hcanogenous light can provide a more agreeable light'for other areas -is-of the room and for esarple lighten the regions 34a and 34b of the floor area and room regions 35a and 35b adjacent the floor area 33 xith'a more hawgenous light.
FIG. 4 clearly shows that the shielding angle a; of the s second light cone 27 is smaller and of for exanple 40 . If a person indicated with.29 in F=G. 4 is situated within the light cone 25, vvhich might not be desired and is not shown in FIG. 4 since-this light cone basically illuminates the display, good-s, ob3ects. or the like, the person would be illuminated with very intense light.:" If the.person 29 is situated within the second -light cone 27 but outside of the first light cone 25 as shown-. in ' '.Fxa. 4 the light generated by the second region 21 vould be considered as agreeable and not disturbing and the person could for example look at the display located on the shelf 30 without is disturbance and with the room being opti.mally illuminated.
If, as not shoarn in FxG. 4, the person 29 is situated-outside the second light cone 27, that.is within a smaller angle than 40 , in relation to the ceiling 12, the:person would not be blinded, as no direct sight connection to the lamp 15 is possible.
ae On the other hand, the person outside of the second light cone 27 perceives the whole room illumination as agreeable.
The degrees given for the shielding angle a1, az obviously can be optionally chosen. in the same way, a plurality of light fixtures 10 can be located on a ceiling of a building 12, the 25 individual light cones,25,.27 also overlapping if necessary, such that fox example the effect is achieved as well, that the floor surface 33 as a whole or for the most part is illuminated very -brightly and intensely with brilliant lighti and most of the room areas at a certain distance from the floor area 32,.for.example at a height of 2 m, are illuminated for the most part by more homogenous light.
= s FT(3. 3 shows a further embodiment of- the light fixture 10, according to the invention that differs from the emboiiiment of F=G: 1 basically regarding a changed design of the diffuser element 18 'that is curved, that is for example spherically arcviate. Again, an inner central first region 20. i.s provided that- basically 'lets 1.0 light pAss through without influencing it and generates:a light cone 25 an$ a second region.21 surrounding the first reQiori 20-like a ring and commonly acting as diffuser and generating a'second:light cone 27.
it should be noted that the ratio of the.width a of the as first region 20 of the diffuser elpauent 18 to the width b of the whole diffuser element 18 in the region is 1:5 to up-to:2:3. The einbodiments of the FIGS. 1 and 3 approximately shavr a ratio of the width a to the width b of the whole diffuser element 18 of about 1:3. If the diffuser element.18 is arcuate, the pidth or diameter 20 'is to be considered that part of the first region 20 that results from the projection of the'diffuser element 18 on a plaae perpendicular to the longitudinal axis L.
The transmission characteristics of the first region 20 and of the second region 21 are different insofar as the light 23 region passing through the first region 20 passes through unhindered by the light source 15, which means basically in an undirected and basically undispersed way and thus particularly the light cone is not'fanned out or focused. The second region- 21, on the other hand, should precisely serve for the harmonization, fanning out.or the direction as well as sometimes for the focusing of the light region passing through the second region 21. This s diffusing effect of the second region 21 can be achieved by treating the surface of the side 22 of the second region 21 facing the light source or alternatively by treating the'side of the.
second region 21 directed away from the light source 15.
Alternatively it is also possible that an existing diffuser elemeat lo - with for example a campletely roughened surface has a surface that.
is treated in the first region 20 such that the side 32 of the first regioa 20 facing the light source is smoothed and thus a clear-glass design of the first region 20 is obtained. In the same way pigiuents, dispersing bodies or such.like can be integrated into 15 the diffuser element 18 in the region 21 or be integrated in'the diffuser element during production.
Preferably the diffuser element 18 is produced and designed in one piece. It is also possible, however, that the diffuser element 18 consist of two pieces or elements or has an 20 opening in the,central region 20 that should be avoided for reasoas of protection and safety'particularly if the afore-mentioned point-type lamps that can reach high temperatures are used.
The second region 21 of the diffuser element 18 can be formed by lenses or prismatic elements or by holographic 25 structures. in the same way, the second regiozi 21, as well as soaaetimes also the first region 20 can be colorless or tinted or colored, wherein differently colored tints are possible, too. Both the colored tints and the diffusing effect can be achieved by-: -gluing on a foil or by fastening of cosVarable elements--on:one-exterior side of the diffuser element 18,.it being also-possible to provide the different regions 20, 21 with different foil"s'..
s The orientation and size of the f irst region= 20 is . such that light from the laup 15 caanot fall directly onathe.reflector element 19. T'hus uncontrolled reflections,can be aqoided -with a sa.mple design.
Advantageously, the first region 20 has an.outer shape K
10. cortespCnaillg-to the total outer shape G of the diffuser=element..18 or to the outear shape of the light outlet 23. It should be' noted that iiu-the embodiment of'yxG. 1 the light outlet 23 also has a rectangular shape. In the embodiment of FIG. 3 the light outlets.
23, the outer shape of the first region 20 and the outer shape of'..
as the diffuser element 18'have a circular shape.
The light source is e.g. a metal halide lazp e.g. a SIT-"-"TC=CH--according to the ZVSY-denomination {ZVE== Zentralverband der-$lektrotechnischen industrie, centrai association of the'electrical industry).
20 The first light cone 25 is preferably narrower than the light cone 27 and is completely surrounded-by.the latter..- In the area of the first light cone 25 the light is added, the light cone 25 due to the bigger luminous flux being dominated basically by the more brilliant, direct light generating starker shadows.
25 The invention makes it possible to achieve two different light qualities by means of a single light fixture and a single light source -with' a very simple design. 'ThLs way the.diffuser has two different dispersion areas.
Further additional liQht guiding or light directing elements, glasses, mirrors or the like that are not shown in the s figures can be provided on the light fixture.
Claims (21)
1. A light fixture (10) with a housing, (11) in which a light source (15) is located and with a light outlet (23), wherein a diffuser element (18) is located in the light path between the light source and the light outlet, characterized in that the diffuser element has two regions (20, 21) with different transmission characteristics for the generation of two different light cones (25, 27).
2. The light fixture (10), in particular according to claim 1 with a housing (11) in which a light source (15) is located and with a light outlet (23), wherein a diffuser element (18) is located in the light path between light source and light outlet that completely covers the light source, characterized in that the diffuser element has two regions (20, 21) with different transmission characteristics.
3. The light fixture (10), in particular according to claim 1 with a housing (11) in which a light source (15) is located and with a light outlet (23), wherein a diffuser element (18) is located in the light path between light source and light outlet, characterized in that the diffuser element has two regions (20, 21) with different transmission characteristics, wherein the ratio of the diameter or of the width (a) of the first region (20) with the total diameter or the total width (b) of the diffuser element (18) is between 1:5 and 2:3 approximately, preferably approximately 1:3.
4. The light fixture according to one of claims 1 to 3, characterized in that the two regions (20, 21) generate different type of lights (25, 27).
5. The light fixture according to claim 4, characterized in that the two different type of lights have different coordinated shielding angles (.alpha.1, .alpha.2).
6. The light fixture according to one of the preceding claims, characterized in that the diffuser element (18) is basically translucent and can only partially disperse, direct or focus light passing through it.
7. The light fixture according to one of the preceding claims, characterized in that the light basically passes through the first region (20) of the diffuser element (18) without being influenced and that the second region (21) diffusely disperses the light.
8. The light fixture according to one of the preceding claims, characterized in that the first region (20) of the diffuser element (18) is basically located in a central position on the diffuser element.
9. The light fixture according to one of the preceding claims, characterized in that the second region (21) of the diffuser element (18) surrounds the first region (20) of the diffuser element like a ring.
10. The light fixture according to one of the preceding claims, characterized in that the diffuser element (18) is composed of glass.
11. The light fixture according to one of the preceding claims, characterized in that the first region (20) of the diffuser element is clear.
12. The light fixture according to one of the preceding claims, characterized in that the second region (21) of the diffuser element is obtained by treating the surface (22), particularly by sand blasting or etching.
13. The light fixture according to one or the preceding claims, characterized in that the light source (15) is basically a point source.
14. The light fixture according to one of the preceding claims, characterized in that the light fixture has a reflector element (19).
15. The light fixture according to claim 14, characterized in that the reflector element (19) is located in the light path between the diffuser element (18) and the light outlet (23).
16. The light fixture according to claim 14 or 15, characterized in that the light source (15) is located and positioned to the first region (20) of the diffuser element (18) such that the portions of light passing through the first region (20), at least the predominant part leaves the light fixture by the light fixture outlet (23) without having been reflected before by the reflector element (19).
17. The light fixture according to one of claims 14 to 16, characterized in that the light source (15) is located and positioned relative to the second region (21) of the diffuser element (18) such that the portions of light passing through the second region (21), at least the predominant part, leaves the light fixture (10) by the light outlet (23) only after the reflection by the reflector element (19).
18. The light fixture according to one of the preceding claims, characterized in that the diffuser element (18) is formed by a flat body (FIG. 1, FIG. 3).
19. The light fixture according to claim 18, characterized in that the body is basically planar (FIG. 1).
20. The light fixture according to claim 18, characterized in that body is basically curved (FIG. 3).
21. The light fixture according to one of the-preceding claims, characterized in that all the light passing through the light outlet (23) has passed through the diffuser element (18) before.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002565474A CA2565474A1 (en) | 2006-10-24 | 2006-10-24 | Light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002565474A CA2565474A1 (en) | 2006-10-24 | 2006-10-24 | Light fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2565474A1 true CA2565474A1 (en) | 2008-04-24 |
Family
ID=39325937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002565474A Abandoned CA2565474A1 (en) | 2006-10-24 | 2006-10-24 | Light fixture |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2565474A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822591A (en) * | 2010-02-23 | 2012-12-12 | 宗拓贝尔照明器材有限公司 | Recessed light having a base body and a dome-shaped reflector |
-
2006
- 2006-10-24 CA CA002565474A patent/CA2565474A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822591A (en) * | 2010-02-23 | 2012-12-12 | 宗拓贝尔照明器材有限公司 | Recessed light having a base body and a dome-shaped reflector |
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