CN101050847A - Semi-embedded type lamp - Google Patents

Semi-embedded type lamp Download PDF

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Publication number
CN101050847A
CN101050847A CNA2007100922767A CN200710092276A CN101050847A CN 101050847 A CN101050847 A CN 101050847A CN A2007100922767 A CNA2007100922767 A CN A2007100922767A CN 200710092276 A CN200710092276 A CN 200710092276A CN 101050847 A CN101050847 A CN 101050847A
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CN
China
Prior art keywords
light fixture
light
ceiling
prism
lid
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Granted
Application number
CNA2007100922767A
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Chinese (zh)
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CN101050847B (en
Inventor
R·特纳
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Flowil International Lighting Holding BV
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Flowil International Lighting Holding BV
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Publication of CN101050847A publication Critical patent/CN101050847A/en
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Publication of CN101050847B publication Critical patent/CN101050847B/en
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    • 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
    • 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
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • 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
    • 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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements
    • F21V25/125—Flameproof or explosion-proof arrangements using intumescent material, i.e. using materials which swells up as a result of heat exposure
    • 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
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/402—Lighting for industrial, commercial, recreational or military use for working places
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Resistance Heating (AREA)
  • Toys (AREA)

Abstract

A semi-recessed luminaire comprising: a housing for a light source, the housing being adapted for recessing within a ceiling such that in use a lower surface of the housing is substantially flush with the ceiling, and a light-transmitting cover which is mountable below the housing, the cover having a primary light-transmitting surface which allows light to be transmitted from the light source, or via a reflector, through the cover to an area below the luminaire, and a secondary light-transmitting surface which allows light to be transmitted from the light source, or via a reflector, through the cover to a region of the ceiling positioned to the side of the luminaire.

Description

Semi-embedded type lamp
Technical field
The present invention relates to a kind of improved semi-embedded type lamp at for example office environment to satisfy up-to-date lighting criteria.Especially, this light fixture can provide than the stronger illumination of conventional lamp to satisfy the requirement of " illumination guide 3 " to ceiling and wall.
Background technology
The light fixture of the correct position in the known for a period of time smallpox plate plate that is installed in ceiling suspension.These light fixtures have the form of metal shell usually, and one or more fluorescent lamps wherein are housed.Usually using the lid that extends on lower surface to hide fluorescent lamp makes it invisible.Lid can have the form of louver (-vre) (louvre) or scatter plate (screen).Light fixture comprises from lighting circuit provides all required circuit of electric power to each lamp.A series of louver (-vre)s, straight line or paraboloid, scatter plate and/or barricade are set usually to change the light output of fluorescent lamp, so that produce desirable illuminating effect in light fixture.For example, they can be arranged to light is directed to the specific region of light fixture below or reduces dazzle to avoid reflective on computer screen.
" illumination guide 3 " is manufacturer's lighting criteria that illumination is attempted to satisfy at office environment traditionally (LG3Cat2) always.LG3 at first announced in 1989, and relates to the illumination in the space with visual display unit.Then, considering Health﹠amp; Upgraded in 1996 under the situation of Safety DSE regulation.Suggestion in this document means that the luminance level of locating greater than 65 ° the elevation angle must keep less than 200cd/m under the situation of using negative polarity software 2(candela/square metre).For positive polarity software and the flat screen with ARC, this can be elevated to 500cd/m 2Or 1500cd/m 2
But the indoor trend of newly handling official business is to use LG3 " Cat2 " light fixture acquiescently.This can produce has dark ceiling and " cave " effect of wall, thereby causes working environment uncomfortable.This practice result causes withdrawing from of classification rating system.
In calendar year 2001, by light and illumination (the Society Of Light﹠amp of association; Lighting) added appendix, the standard that is changing, new technology and screen type considered in this appendix." illumination guide 7 " write and announced in this association (LG7) recently again: office lighting.LG7 in conjunction with and upgraded the LG3 guide that uses at display screen in early days.
Illumination guide 7: office lighting (for the new suggested of wall and ceiling illuminance) has proposed to solve the dark that Cat2 louver (-vre) and reflector may cause and the suggestion of dim effect.For fear of unexpected ceiling blocking and bright fan-shaped, formulate the following rules:
" when using when only using the screen of positive polarity software, become with vertical plane 65 ° above the limit of brightness of light fixture be 1500cd/m 2".(this also is applicable to ceiling and wall.)
" by directly and the average wall illumination formed of indirect reference component above the working face should be at least 50% of average level illumination on working face.(each wall should not be less than 30%) ".
" do not show dark in order to make ceiling, by directly and the average illumination on ceiling formed of indirect reference component should be at least 30% of the average level illumination that runs through working face.”
" for the task based on screen, working face brightness should be 300lux, then will reach 500lux for the main task based on paper.”
Usually by using product combination to realize the LG7 standard, this product is for example for the downward lamp in ceiling that roughly downward light is provided with the upwards lamp on the wall of being positioned at of illumination is being provided on the ceiling.Usually on desk (working face), working light is set so that increase illumination partly in the position of needs.Fig. 1 referring to accompanying drawing.
Recently, the many light fixture products that meet LG7 have appearred on the market claiming.These production sharing two classes.For the first kind, light source tends to be installed in the recessed housing below of light fixture, and is arranged to upwards guide light facing to the reflector in the light fixture.In some instances, light source is suspended on the housing below in one " hanging basket (gondola) ", but in other example, the rigid structure of light fixture is suitable in this suspension arrangement light source being installed.In another kind of, light source is arranged in the recessed housing,, above the horizontal plane of ceiling suspension, and is provided with special-purpose member to attempt with the level that is lower than dazzle limit light being directed to adjacent wall and ceiling that is.
Summary of the invention
A first aspect of the present invention provides a kind of semi-embedded type lamp, comprising:
The housing that is used for the lamp source, this housing are suitable for being embedded in the ceiling so that the lower surface of this housing is basic concordant with ceiling in use; And
Can be installed in the light transmitting cover of this housing below, this lid has
Main light transmissive surfaces, this main light transmissive surfaces make light can from light source or via reflector by lid be transmitted to the light fixture below the zone and
Less important light transmissive surfaces, this less important light transmissive surfaces make light be transmitted to the zone of the ceiling that is positioned at light fixture next door by lid from light source or via reflector,
Wherein, this accidental light transmissometer mask has a plurality of parts so that the regional deflection of the ceiling on next door from the light of light source or reflector incident towards light fixture.
The present invention is favourable with respect to traditional LG3 light fixture, and this is because additional light is directed near the perpendicular walls and the adjacent domain of ceiling via less important light transmissive surfaces, thereby improved working environment is provided.
These a plurality of parts preferably include a plurality of prisms or lens, thereby this prism or lens are arranged to by the properties of materials refract light path of light be departed from towards ceiling.Preferably, this light deflection component is a trihedral prism, and this trihedral prism has a side of the side that is basically perpendicular to lid, a side that is formed by the side of lid and the hypotenuse that constitutes downside.Preferably, in path, be refracted and depart from the light of the upper side of trihedral prism and/or downside incident by lid.A plurality of prisms also can provide a plurality of reflectings surface, and these reflectings surface are angled so that the light towards the regional reflex of the ceiling on light fixture next door from light source or reflector (or generally in light fixture) incident.Reflecting surface can be formed by the upper surface of prism.Preferably use the general lighting effect of the combination realization light fixture of refraction and reflection.
Preferably, via the enough light of less important light transmissive surfaces guiding so that under normal operation, by directly and the average wall illumination formed of indirect component above the working face be on the working face that is arranged on below the light fixture average level illumination at least 50%.Preferably, neither one constitutes the wall of this average less than 30% of the average level illumination on the working face.Any change of the illumination on the wall preferably takes place gradually.This helps avoid and makes wall look dim and oppressive.
Also preferably, the average illumination of being made up of direct projection and reflecting component on ceiling is for across at least 30% of the average level illumination of working face.This has improved the brightness of ceiling region, and makes working environment feel more comfortable.
Ideally, the brightness that becomes the position light fixture above 65 ° the elevation angle with vertical plane near but be preferably lower than 1500cd/m 2,, may see that these fan-shaped or spots are reflected in the display screen to avoid on wall occurring bright fan-shaped or spot.This brightness limit preferably is applied to ceiling and wall.
Light fixture also produces the illumination of 200lux (floor level that HSE sets for the zone that forever occupies) at least on the working face that is arranged at below this light fixture, and preferably on working face, realize the illumination of 300-500lux, so that be suitable for task based on screen or paper.
Preferably, this light fixture can satisfy all above-mentioned requirements in the indoor or business environment at typical office or other, thereby observes LG7.
Preferably, the light deflection component is formed by the array of the prism on the inner surface that is arranged on lid side especially trihedral prism.These light deflection components have the advantage that can easily form during extrusion process.These light deflection components are arranged on the inner surface of lid and mean and to prevent dust that dust may make mis-behave.
In one embodiment, the light deflection component comprises trihedral prism, and the upper surface of this prism is inclined relative to horizontal 5 ° or bigger angle, but is not more than 30 °.In most preferred embodiment, the angle that this prism is arranged to respect to the horizontal plane is 10 °-22 °, and most preferred with respect to the horizontal plane average angle is that about 16 ° (± 3 °) are to provide the optimal illumination of ceiling and wall.Preferably, this trihedral prism is the right angle trihedral prism substantially, and its upper surface is formed by vertical side and lower surface limits hypotenuse.Preferably, the angle at place, summit between upper surface and lower surface is 42 °-52 °, more preferably is 45 °-49 ° and is most preferably about 47 °.Preferably, the lower surface of prism and the angle of horizontal plane are 15 °-47 °, more preferably are 20 °-42 °, also more preferably are 25 °-37 ° and are most preferably 28 °-34 °.Most preferred angle is for respect to the horizontal plane becoming about 31 °.But, it is also contemplated that 20 °-50 ° of deflection light are so that produce the evenly prism and the lens of other shape of illumination on ceiling as requested, these are imagined within the scope of the invention.
Preferably, prism throws light on (coming from refraction or light the reflection on upper surface of light by prism) with dispersion with slightly different angle setting, and produces more uniform illuminating effect.
Preferably, the side of lid is outwardly-bent so that extend to beyond the foot of housing.This not only can provide more graceful and distinguished outward appearance, and the edge that can hide lamp casing in light fixture is contained in ceiling the time makes it invisible.
Preferably, the lower surface of lid has crooked profile and the side of lid reduces to engage the edge of this lower surface smoothly from housing.This profile makes can observe LG7 in the room with normal heights of ceilings and reflectance factor, and makes light fixture have distinguished and new-type outward appearance.This structure is minimum and can not interfere the spray pattern of fire extinguisher from the extended degree of ceiling.
Preferably, the lower surface of lid and side by co-extrusion pressure to form cover part.Preferably, half of the opening of the basic covering shell of this cover part.This has the following advantages, that is, the manufacturing tolerance (reaching 6%) in the extrusion process can be absorbed by the part of the framework that is positioned at the light fixture middle part or the center panel.Can select among the embodiment at one, the whole lower surface of single (monoblock type) lid with covering shell is provided.
Preferably, light fixture uses existing linear fluorescent lamp as light source.The present invention can be by one or two lamp (for example, the lamp of single 55W) that is provided with placed in the middle-the provide working environment that has better illuminating effect than traditional LG3 Cat light fixture in light fixture of half quantity or fluorescent lamp still less-for example be provided.This has reduced the operating cost of light fixture.
Description of drawings
Only describe some preferred embodiments below with reference to accompanying drawings in detail as example, in the accompanying drawings:
Fig. 1 illustrates the lighting arrangements that is used for the room that meets LG7;
Fig. 2 illustrates from the perspective view of a preferred embodiment of light fixture of the present invention following and that see towards a turning;
Fig. 3 a, 3b and 3c illustrate front view, side view and the upward view of the light fixture of Fig. 2 respectively;
Fig. 4 illustrates from another preferred embodiment of light fixture of the present invention following and that see towards a turning;
Fig. 5 a, 5b and 5c illustrate front view, side view and the upward view of the preferred light fixture of Fig. 4 respectively;
Fig. 6 illustrates the side cross-sectional view that is arranged on the preferred light fixture in the room ceiling;
Fig. 7 a illustrates in greater detail the cross section of preferred light fixture, and Fig. 7 b illustrates the zoomed-in view that is arranged on a plurality of prisms on the less important light transmissive surfaces;
Fig. 8 a illustrates the part of prototype light fixture, although this prototype light fixture is that the improvement of traditional LG3 light fixture is still produced excessive dazzle at the particular elevation place.In Fig. 8 b, illustrate preferred light fixture correspondence part as a comparison; And
Fig. 9 a is illustrated in interior many other modification of the present invention to 9d.
The specific embodiment
As shown in Figure 1, in order to meet the listed regulation of LG7, can provide light by the combination of downward lamp 1 and wall lamp 4, this downward lamp is installed on the ceiling 2 so that light is transmitted on the working face 3, thereby this wall lamp is arranged to illuminate ceiling 2 and is reflected light to and also illuminates wall in the room.Downwards lamp 1 for example can be the LG3 light fixture that does not produce dazzle above 65 ° the elevation angle becoming with vertical plane.Wall lamp 4 also will not produce dazzle in this elevation angle.If necessary, can use the working light 5 that is arranged on the working face 3 that additional light is provided.
Fig. 2 illustrates a preferred embodiment of light fixture 10 of the present invention.Light fixture 10 comprises that form is the housing 12 towards the box of open lower side, and the observer is hidden the content of housing 12 and reduces lid 14 from the dazzle of light source (not shown).
Housing 12 has side 16 and top 18, and it defines the encapsulating shell of the content that is used for light fixture 10.In use, with the space that light fixture 10 embeds in the ceiling 2, this ceiling is ceiling suspension normally.The size of light fixture 10 is preferably corresponding to the normal size of smallpox plate plate, thereby light fixture 10 alternative smallpox plate plates are assembled.Fig. 2 illustrates square light fixture 10, and this light fixture for example can be used for the opening of 600 * 600mm, and Fig. 4 illustrates the rectangle light fixture 10 as the modification of this light fixture, and it can be used for the opening of 1200 * 600mm.The size of housing preferably makes light fixture 10 can substitute existing LG3 unit and is assembled.
But housing 12 is not limited to shape mentioned above and size, but can have any suitable shape and size, as long as its corresponding groove that can be installed in ceiling 2 is interior just passable.For example, housing 12 can be made into and can be contained in triangle or the hex hole, if perhaps big or small size-these shape and size that form suitable 300mm or 500mm generally adopt.The side 16 of housing 12 can limit the shape different with lid 14, only otherwise interfere the adjacent smallpox plate plate of ceiling suspension to get final product.For example, housing 12 can be circular and only have a side 16 and a top 18, can be triangle and has three sides 16 and a top 18, can be hexagon and have six sides 16 and a top 18, or the like.
In case install, then the wall 16 of light fixture 10 and top 18 will be embedded in the cavity of ceiling suspension 2 tops.The lower edge of side 16 preferably have can be evenly near the flange 20 on the surface of ceiling 2.Flange 20 is preferably ornamental with any gap around the side 16 that is hidden in light fixture 10, but also can make housing rigidity bigger and be used for light fixture 10 is fixed in the ceiling 2 and provide some structural function aspect these.Flange 20 also can cover the layer of the intumescent material (not shown) of the fire-protection rating that is used to improve light fixture, or prevents that moisture is inhaled into the moisture seal spare (not shown) in the ceiling cavity of the side periphery of light fixture 10.Can the additional fixation device that for example has adjustable plate 22 forms be set on the opposite flank 16 of housing 12, so that light fixture 10 is installed in the ceiling 2.
Lid 14 at an upper portion thereof the size at 24 places, edge make consistent with the opening of smallpox plate plate, thereby and consistent with the opening of housing 12.The lower edge 26 of lid 14 extends preferably to certain distance beyond the foot of opening, and this distance is for example corresponding at least along the size of the flange 20 of two opposite edges, shown in Fig. 3 c.
Lid 14 extends downwards from the surface of ceiling 2, and preferably has crooked concave surface profile when seeing from the side, and its curvature meets the arc with constant radius R.The downside of lid 14 forms main light transmissive surfaces 28, and the side forms less important light transmissive surfaces 30 (hereinafter will illustrate in greater detail).But also can be other profile, for example this curved surface can be parabola shaped or waveform.The cross section of lid can be straight, the lid 14 of for example square or rectangular box shape.Profile can use straight line to come the approximate simulation curve, so that two shallow delta-shaped regions for example are provided.It can be the shallow cylinder (being roughly plate-like) with bottom flat, recessed or projection that lid 14 is looked from below.In such an embodiment, main light transmissive surfaces can be circular, and less important light transmissive surfaces can be the cylindrical wall that extends around circumference.Lid 14 can be asymmetric.In fact, lid 14 can have different shape.Main standards is that lid 14 should make light fixture 10 meet LG7 by suitable light source and the location in the room (given normal heights of ceilings and reflectance factor).
Can be clear that from Fig. 2 lid 14 has the main light transmissive surfaces 28 that the lower surface by lid 14 forms, this main light transmissive surfaces makes the light can be from light source along the downward direction transmission to illuminate the working face 3 that is arranged on light fixture 10 belows.Lid 14 also has less important light transmissive surfaces 30, and this less important light transmissive surfaces is arranged to make light can leave from light source along lateral to illuminate ceiling 2 and perpendicular walls 6.
It is how preferably to be formed by the part with different optical transmission characteristics that Fig. 2 illustrates main light transmissive surfaces 28.The left side of the lower surface of lid 14 and right lateral bending rectangular surfaces 32 and 34 are preferably made by a kind of material or are had and belong to one group optical characteristics, and center rectangular panel 36 is made from a variety of materials or has been processed into has different optical characteristics, hereinafter will illustrate in greater detail this.Less important light transmissive surfaces 30 is preferably also made by the different piece with multiple orientation and optical characteristics, side panel 38 and be roughly interior filling (in-fill) panel 40 of triangle (bending radius of hypotenuse is R) for example, they all help transmitted ray as the part of less important light transmissive surfaces 30.
Figure 4 and 5 a-5c illustrates the modification of the light fixture 10 with essentially rectangular profile.For with Fig. 2 and 3a-3c in identical parts use identical reference number.
Fig. 6 illustrates the viewgraph of cross-section of embodiment of the light fixture 10 of Fig. 2.Shown in light fixture above working face 3, partly be embedded in the ceiling 2 in room.Mark in the drawings and become 65 ° the elevation angle with vertical plane, above this elevation angle, do not allow to occur dazzle.From then on how figure only illuminates the lower area of perpendicular walls 6 as can be seen fully according to the light (promptly not having light via less important light transmissive surfaces transmission) of LG3 Cat2 transmission, and forms dim dark area on ceiling 2.
In the present invention, the lid 14 of light fixture 10 has been modified to and has made light also towards side and upwards being directed towards ceiling 2, so that illuminate wall and ceiling.So that guide enough light, can meet LG7 by correct selection element to wall and ceiling.Thereby in the present invention, less important light transmissive surfaces 30 has a plurality of parts, so that regional deflection (by refraction or reflection) that will be from the light of light source 42 or reflector 44 incidents towards the ceiling 2 on light fixture 10 next doors.Most of light will at first be set at light source 42 tops and in reflector 44 reflections at 18 places, top of housing 12, this reflector 44 is preferably paraboloid.But some light may directly come out from light source 42, incide then on the light deflection component of less important light transmissive surfaces 30.
Fig. 7 a illustrates in greater detail the cross section of preferred light fixture 10.This cross section is corresponding to the square and rectangle light fixture 10 shown in Fig. 2 and 4.
Shown in Fig. 7 a, housing 12 provides box for the standard integrated (standard collection) of electric component 46.Assembly 46 can comprise ballast and control circuit, and preferably they all are positioned at reflector 44 back so that they are invisible and protect them not to be heated.Light fixture 10 preferably is equiped with electric wire in advance, so that the electrician only needs the terminal of light fixture 10 is connected on traditional lighting circuit so that light fixture work.Can in the top 18 of housing 12, ventilation slot be set so that waste heat is discharged.In one embodiment, be provided with the layer (not shown) of intumescent material so that at situation lower seal ventilation slot on fire across the inner surface at top 18 or outer surface.Although housing 12 can be made with the material of for example plastics, preferably for example aluminium or steel are made with sheet metal.
Preferably, light source 42 is across the width of the housing 12 direct-line fluorescence pipe that is provided with placed in the middle.Be provided with in for example shown in Figure 6 the setting at other, light source 42 can comprise two fluorescent lamps that (just in time being arranged on the both sides of center line) is set side by side between two parties across the width of housing 12.But the fluorescent tube doubling of single lamp has the U-shaped fluorescent lamp of two parallel portion with formation.
As shown in the figure, an advantage of the invention is that light source 42 can be positioned at the space that is limited by housing 12, thereby this light source is embedded in the ceiling 2 rather than is suspended on the horizontal plane below of ceiling as the light fixture of many prior aries.But, if desired, light source 42 can be positioned to be lower than shown in the position, for example be lower than the horizontal plane of ceiling, and, still can realize advantage of the present invention by the light deflection component is carried out suitable modification, preferably can meet LG7.From aesthstic angle, it is more little then good more that light fixture protrudes downwards from ceiling 2, because this makes that light fixture can be too not outstanding.Also may be more cheap aspect material.In addition, the spray pattern of light fixture interference fire extinguisher is dangerous less.Therefore, preferably light source 42 is placed in the horizontal plane top of ceiling 2 towards the bottom of housing 12.
Light fixture 10 is not among other embodiment of square or rectangle therein, for example, may wish to use non-directional light source 42.(even under the situation in these embodiment will be installed in square or rectangle smallpox plate plate hole) can use the circular fluorescent pipe in the embodiment of the lid 14 with circular structure, and perhaps the lamp of Jin Cou cylindrical winding can prove useful by producing spot light.Certainly, also can use the lamp of other form except fluorescent lamp, but have higher operating cost for these lamps, this makes them be obstructed on market.
Light transmitting cover 14 preferably is made of different piece.In the example of Fig. 2 and 4, shown in lid constitute by three parts.Fig. 7 a illustrates cover part 48 and how the side panel 38 of the rectangular surfaces 32,34 of bending of (i) main light transmissive surfaces 28 and (ii) less important light transmissive surfaces 30 is provided and is roughly and fill panel 40 in leg-of-mutton.Cover part 48 extends into half of opening of covering shell 12 almost.Preferably, cover part 48 opening 40% on extend, more preferably on 45%, extend.The left side is preferably identical with right cap subassembly 48 to keep manufacturing cost lower.But, may wish to change under the situation of the amount of light of the not ipsilateral transmission of light fixture 10, for example for only being positioned to the light fixture of a side near vertical plane, the left side can be different with the right cap subassembly.
Cover part has lower surface 32,34 (crooked rectangular surfaces), this lower surface is made by such material, that is, this material make from the light of light source 42 can be directly from light source 42 or more possibly from the paraboloid 44 that is arranged on light source 42 tops through reflection and be transmitted on the working face 6.This material preferably provides scattered light so that dazzle is minimum to working face.This material preferably has the fineness of satin face (satin) or opal.This can by make the surface have the pit of small formation thing-for example or jut-arrangement so that realize at desirable limit inscattering light.Some light also may be reflected away and outwards arrive this less important light transmissive surfaces by the inner surface of this panel.This surface constitutes thing and can carve so that for example produce taper and cave in and realize by utilizing the precision press-molding parts to carry out bead or point.Meticulous salient line or chase also can produce desirable effect.Preferably, forging the face effect is uniform on whole zone.But size, pattern and the density that can change the formation thing are so that lower surface 32,34 has the diffusivity of variation.This material can comprise that also the fine grained made by the material with different optical characteristic or thin pearl are to produce satin face or translucent fineness.Also can realize by on cover part 48, applying the scattering trnaslucent materials.
In fact, the described lower surface 32,34 of cover part 48 can be made by a series of different materials.This material gets at the luminous energy greater than 300lux to reach working face, but preferably is not more than 500lux but preferably.Preferably, this material presents translucent and is enough opaque for the observer, makes it invisible with the content of hiding light fixture.Makrolon material is preferred, but under the situation that regulation allows, also can use other plastics for example crylic acid resin or other transparent/translucent material.
In the embodiment shown in Fig. 2 and 4, main light transmissive surfaces 28 is made up of the lower surface 32,34 and the center rectangular light transmission panel 36 of left side and right cap subassembly 48, so that light can directly be transmitted to downwards on the working face 3 from light source.In an embodiment (not shown), the center panel 36 comprises the part of being made up of the reflection louver (-vre), the cross layout that it is arranged to parallel louver (-vre) or more preferably is arranged to reflecting surface is so that be limited in the possible dazzle of top, 65 ° of elevations angle along all directions.More preferably, the center panel 36 is strip materials that scattered light can be provided to working face 3.
The material of the center panel 36 preferably has the fineness of satin face or opal.In one embodiment, this surface has taper rib lens arra (for example, forming by molded or punching press).These rib lens disperse so that provide uniform illumination to working face 6 light from light source.These rib lens also are limited in possible dazzle in 65 ° the circular cone elevation angle enveloping surface.Illustrated as combined cover parts 48, also can use other material or prism shape, as long as they get at enough luminous energy to reach working face 6 and can not be created in the dazzle that extend 65 ° limit top.Usually, though from cone prism some reflections are arranged, the light that arrives working face 6 from the center panel 36 will directly come out to point to working face 6 from light source 42.Preferably, (the center panel) material is different with the material of cover part 48 or look different, so that the downside of light fixture 10 is produced visual attraction.
Cover part 48 also has side panel 38, and this side panel extends to the lower edge of main light transmissive surfaces 28 from the lower edge of housing 12, to form all or part of of less important light transmissive surfaces 30.Side panel 38 is preferably made by the material different with lower surface 32,34 or is had different optical characteristics with this lower surface.Cover part 48 can be made by the co-extrusion pressure of these two kinds of materials.
Side panel 38 preferably clearly so that light as much as possible pass cover part 48 and leave.But, it is contemplated that such embodiment, wherein side panel 38 has the fineness of satin face or opal so that reduce possible dazzle to the observer (greater than 1500cd/m 2).Referring to for example Fig. 9 b and 9c.The material of selecting for side panel 38 is a Merlon, but can use other material if necessary.
The essential feature of cover part 48 is, less important light transmissive surfaces 30 has a plurality of parts 50 so that the regional deflection that is positioned at light fixture 10 next doors from the light of light source 42 or reflector 44 incidents towards ceiling 2.Shown in Fig. 7 b, these light deflection components 50 are arranged on the inner surface of side panel 38.If necessary, light deflection component 50 can be arranged on the less important surface in the lid 14, and side panel 38 can be used as window, be used to make the therefrom transmission of light that has been deflected, but this is the higher setting of a kind of cost.Light deflector surface 50 also can be arranged on the outer surface of side panel 38, but they will be exposed in the dust like this, thereby dust has reduced very fast gathering the refraction and the reflection characteristic of light deflector surface.Therefore, light deflector surface 50 is arranged on the inner surface provides good solution for these technical problems.The light deflector surface also can easily form in extrusion process.Preferably, also a plurality of smooth deflector surfaces 50 are set being roughly to fill on the panel 40 in leg-of-mutton.
Light deflection component 50 preferably is arranged to horizontally extending trihedral prism array.When the cross-sectional view shown in Fig. 7 b is seen, they are similar to sawtooth.But, also can use other setting of prism or ridge.Key issue is to return enough light to the zone that is positioned at light fixture 10 next doors (and peripherad wall) deflection towards ceiling, that is, the quantity of light deflection component 50 should be abundant, has enough refracting characteristics and/or index ellipsoid to realize this effect.Like this, thus ceiling 2 is illuminated has avoided sensation dark and that constrain.Light also will be reflected and leave ceiling 2 and arrive on the perpendicular walls 6 to improve these lip-deep brightness.Preferably, by less important light transmissive surfaces 30 towards the side with upwards guide enough light to meet the requirement of LG7.
The upper surface of trihedral prism 50 is the plane preferably, account at least its area more than 75% or bigger.Preferably, the angled inclination of upper surface and horizontal plane, this angle be 5 °-30 ° (comprising end points), more preferably be 11 °-22 °, also more preferably be 14 °-18 ° and most preferably approximately become 16 ° with horizontal plane.Under light source 42 situations about being provided with placed in the middle, found that 16 ° angle is that the light fixture 10 of 600mm is optimum for width.
In the light fixture shown in Fig. 7 b 10, the end face of prism and the lower surface of prism intersect at summit place limiting an angle, and this angle is 37 °-57 °, more preferably is 42 °-52 ° and is most preferably about 47 °.Lower surface also will be responsible for reflecting from the light of light source 42 or reflector 44 and increase the general lighting effect of light fixture.This lower surface also helps to reduce the dazzle in zone since then.
The lower surface of prism preferably with horizontal plane at angle, this angle be 15 °-47 °, more preferably be 20 °-42 °, also more preferably be 25 °-37 ° and be most preferably 28 °-34 °.Most preferred angle is to become about 31 ° (± 3 °) with horizontal plane.But, also be useful greater than 47 ° angles for improving at LG3 Cat2 light fixture, hereinafter will be described in more detail this.
Preferably, side panel 38 has at least six prisms 50, more preferably at least nine, also more preferably at least ten three and most preferably 16 or polygon prism 50 more.Prism 50 extends on the length of lid 14 as much as possible, and is continuous on this length preferably.
Prism 50 does not need to have identical inclination, and prism can be slightly different so that light is dispersed on the ceiling 2 with the inclination of adjacent prism.Preferably the upper surface of at least 80% prism 50 is inclined relative to horizontal 11 °-22 °, more preferably at least 90%, also more preferably at least 95% and most preferably all upper surfaces all in this slant range or approach with respect to the horizontal plane most preferred 16 ° of inclination angles.
Preferably the lower surface of at least 80% prism 50 be inclined relative to horizontal 20 °-42 °, more preferably at least 90%, also more preferably at least 95% and most preferably all lower surfaces all in this slant range or approach with respect to the horizontal plane most preferred 31 ° of inclination angles.
Although shown in trihedral prism be roughly square, also can use other shape with identical or similar refraction action.Can use prism shape corresponding to isosceles, equilateral or sealene triangle.Prism can have more than three side or be combined with convex surface or concave surface, perhaps can be the mixing of these prism structures.
Fig. 8 a illustrates wherein side panel 38 intilted early stage prototype when dropping to main light transmissive surfaces 28 from housing 12.The upper surface of prism 50 be inclined relative to horizontal about 21 ° angle [alpha] (along with Fig. 8 b in shown in the opposite direction of preferred embodiment tilt).The upper surface of prism and the angle beta between the lower surface are 47 °.Lower surface is inclined relative to horizontal about 68 °.
Although this prototype is the improvement to traditional LG3 light fixture, there is too much dazzle on light fixture 10 next doors and does not meet the requirement of LG7.Lower edge by mobile side panel 38 is so that this lower edge extends outwardly into beyond the foot of housing 12-rather than the light fixture 10 that extends internally-revise.The upper surface of prism and the angle beta between the lower surface remain 47 °, and the angle of the side of upper surface and lid 14 is 90 degree.This moment, lower surface was inclined relative to horizontal 31 ° angle, this means that end face this moment inclination alpha with respect to the horizontal plane is 16 °.Therefore prisms tilted about 37 ° angle.The brightness results of this modified setting shows, and is desired as LG7, can realize desirable on ceiling 30% brightness and 50% brightness on wall, or the like, can not make the observer see excessive dazzle simultaneously.Table I and II illustrate the brightness results of the light fixture of Fig. 8 a and 8b respectively.
Cover part 48 preferably uses the protuberance and the line of rabbet joint device that are bonded with each other to be connected on the housing 12.In being provided with shown in Fig. 7 b, an edge join one spring upper-part (sprungmember, not shown) of cover part 48, this spring upper-part impel the side 16 of the opposite edges contact housing 12 of cover part 48.Simultaneously, a pile 52 is positioned at the base portion of the line of rabbet joint 54 to support its weight in the top of cover part 48.Mounting cover subassembly 48 can be rapidly and is easily entered in the light fixture 10 to change the lamp that lost efficacy or to keep in repair in this way.The track 32 that is provided by housing 12 is provided shown the center panel 36, and can easily be removed so that enter light fixture 10 similarly.Certainly, other setting that is used for cover part 48 is connected on the housing 12 also is possible, and should be considered within the scope of the invention.
Fig. 9 a illustrates multiple other possible modification to 9d.
In Fig. 9 a, light fixture 10 has metal or plastic casing 12.The material of the center panel 36 is clear prism panels.Cover part 48 has the side panel 38 that lower surface 32,34 that the satin face diffuser material makes and clear prism material are made.
In Fig. 9 b, light fixture 10 has metal or plastic casing 12.The material of the center panel 36 is clear prism panels.Cover part 48 has the side panel 38 that lower surface 32,34 that the satin face diffuser material makes and satin face diffuser material are made.
In Fig. 9 c, light fixture 10 has metal or plastic casing 12.Lid 14 is formed by single cover part 48.In this embodiment, cover part 48 is single scattering objects of satin face.Selectively, available clear prism panel material forms side panel, and the surface of co-extrusion pressure lid 14.
In Fig. 9 d, light fixture 10 has metal or plastic casing 12.The material of the center panel 36 is clear prism panels.Cover part 48 has the side panel 38 that lower surface 32,34 that the satin face diffuser material makes and clear prism material are made.It also shows with being roughly of making of clear prism material and fill panel 40 in leg-of-mutton.
Therefore, a kind of improved light fixture 10 has been described above, this light fixture 10 can be avoided the defective of LG3Cat2 to produce more comfortable working environment by illuminating wall 6 and ceiling 2.Can satisfy the suggestion of LG7 in a preferred embodiment.In a preferred embodiment, linear fluorescence light source 42 provides the downward light of 300lux at least by cone prism panel 36 on horizontal operation plane 3 under the normal room height of 2.4-2.8m, what this panel 36 helped to realize to be advised is becoming with vertical plane above 65 ° the elevation angle less than 1500cd/m 2Brightness limit.Direct light and be conducted through clear prism (side panel 38) from the reverberation of paraboloid 44, this prism with anaclasis to the ceiling surface so that the mean flow rate on the ceiling 2 is at least 30% (under normal heights of ceilings and a reflectivity) of the mean horizontal intensity on the working face 3.The bright perpendicular walls 6 of illumination of lower surface 32,34 transmissions of the diffuser panel by lid 14, thus be at least 50% (under normal heights of ceilings and reflectivity) of the mean horizontal intensity on the working face 3 in the mean flow rate on the wall.
Description of reference numerals
1. downward lamp
2. ceiling
3. working face
4. wall lamp
5. working light
6. vertical wall
10. light fixture
12. housing
14. lid
16.12 the side
18.12 the top
20.12 flange
22. plate
24.14 top edge
26.14 lower edge
28.14 main light transmissive surfaces
30.14 less important light transmissive surfaces
32.28 the left lateral bending rectangular surfaces
34.28 the right lateral bending rectangular surfaces
36.28 the center rectangular panel
38.30 side panel
40.30 the interior filling panel of fundamental triangle
42. light source
44. reflector
46. electric component
48. cover part
50. prism
52. pile
54. slit
Table I
The photometering result
Title: Office Lyte 02
Numbering: 01 Diameter: 0mm
Record: Office Lyte Length: 580mm
Test number: 01 Width: 580mm
The type of lamp: Highly: 65mm
The numbering of lamp: 1 Power: 0W
The lamp flux: 4800lm The operator: lan Craig Master
Date: 06/12/2005 13:48:57 LOR： 55.3％
Note: Office Lyte 1 * 55W. photometering center is at the prism mid point
Brightness [cd/m2] Office Lyte 02/ conical surface
G/C[cd 0.0 15.0 30.0 45.0 60.0 75.0 90.0 105.0 120.0
45.0 2051.59 2008.32 1975.98 1923.63 1950.59 2010.14 2142.21 2040.12 1982.21
50.0 2005.00 1945.74 1864.93 1816.83 1805.58 1878.87 2003.55 1902.70 1842.07
55.0 2195.62 2088.70 1844.52 1666.19 1621.79 1679.00 1846.58 1730.07 1658.90
60.0 1712.66 1696.48 1591.46 1381.93 1294.24 1295.38 1448.95 1369.40 1305.70
65.0 1183.99 1127.00 1036.68 986.06 875.73 765.37 750.49 738.65 800.11
70.0 1337.27 1253.37 1109.16 896.87 754.49 725.47 675.21 662.80 696.22
75.0 1596.56 1508.27 1260.70 925.69 721.11 613.98 581.58 570.06 626.14
80.0 1783.72 1615.17 1274.75 960.35 718.57 541.07 512.04 461.42 556.13
85.0 2520.11 2190.31 1569.37 1039.92 674.59 503.13 347.01 347.54 501.86
G/C[cd 135.0 150.0 165.0 180.0 195.0 210.0 225.0 240.0 255.0
45.0 1964.80 1992.39 2047.70 2106.18 2041.70 1978.44 1932.78 1938.79 1981.98
50.0 1831.54 1895.75 1940.20 2025.02 1945.17 1874.78 1811.93 1798.25 1845.01
55.0 1667.53 1777.26 2018.50 2234.43 2104.40 1836.36 1659.53 1598.15 1632.76
60.0 1392.22 1571.35 1838.37 2052.63 1891.55 1648.75 1387.81 1264.33 1229.34
65.0 939.74 1114.82 1115.18 1200.24 1121.28 1045.70 971.17 836.11 782.01
70.0 809.10 991.08 1211.74 1360.41 1254.61 1069.43 873.98 722.57 661.25
75.0 786.95 1027.41 1336.26 1525.24 1390.32 1174.06 905.22 706.31 582.42
80.0 750.10 1091.61 1569.36 1944.90 1713.65 1307.34 937.62 688.68 528.56
85.0 776.12 1329.08 2214.83 3089.42 2539.10 1718.85 1078.15 728.53 498.61
G/C[cd 270.0 285.0 300.0 315.0 330.0 345.0
45.0 2116.62 1986.49 1927.15 1891.83 1920.12 1983.56
50.0 1976.04 1845.04 1779.78 1750.50 1818.07 1897.67
55.0 1812.36 1656.28 1571.59 1579.05 1692.60 1965.37
60.0 1258.05 1199.74 1180.45 1267.47 1439.01 1637.73
65.0 725.36 709.52 748.65 861.46 980.29 1056.33
70.0 649.99 636.93 669.96 764.31 933.85 1155.35
75.0 578.85 548.50 604.34 753.83 1009.65 1371.21
80.0 449.53 455.35 552.31 779.54 1037.43 1407.86
85.0 342.21 305.67 528.42 758.01 1142.20 1787.40
Table II
The photometering result
Title: Office Lyte 06S
Numbering: 05 Diameter: 0mm
Record: Office Lyte Length: 580mm
Test number: 01 Width: 580mm
The type of lamp: Highly: 65mm
The numbering of lamp: 1 Power: 0W
The lamp flux: 4800lm The operator: Lan Craig
Date: 22/02/2006 13:41:41 LOR: 55.7%
Note: Office Lyte 1 * 55W.Off tool Arrow prism side becomes 20 to spend angles with vertical plane on both sides.There is not internal lid.Membrane side (Drawing film sides).The photometering center is at the prism mid point.The preferred 0 degree plane of symmetric condition.
Brightness [cd/m2] Office Lyte 06S/ conical surface
G/C[cd 0.0 15.0 30.0 45.0 60.0 75.0 90.0 105.0 120.0
45.0 1974.73 1941.19 1951.58 1973.64 2006.14 2071.05 2257.01 2071.05 2006.14
50.0 2058.53 1968.48 1839.72 1828.23 1872.07 1946.26 2123.44 1946.26 1872.07
55.0 2059.99 1905.20 1759.30 1665.02 1690.63 1797.34 2010.02 1797.34 1690.63
60.0 1613.36 1520.55 1432.44 1372.33 1366.56 1419.54 1579.63 1419.54 1366.56
65.0 1154.22 1174.54 1142.84 1016.36 905.10 810.28 804.02 810.28 905.10
70.0 1030.10 969.38 901.63 826.02 757.54 739.71 739.07 739.71 757.54
75.0 1081.83 1000.23 888.92 785.01 688.57 656.85 657.01 656.85 688.57
80.0 1215.17 1077.39 892.80 756.97 629.36 566.37 562.24 566.37 629.36
85.0 1492.73 1305.15 986.74 773.02 579.34 475.84 461.69 475.84 579.34
G/C[cd 135.0 150.0 165.0 180.0 195.0 210.0 225.0 240.0 255.0
45.0 1973.64 1951.58 1941.19 1974.73 1941.19 1951.58 1973.64 2006.14 2071.05
50.0 1828.23 1839.72 1968.48 2058.53 1968.48 1839.72 1828.23 1872.07 1946.26
55.0 1665.02 1759.30 1905.20 2059.99 1905.20 1759.30 1665.02 1690.63 1797.34
60.0 1372.33 1432.44 1520.55 1613.36 1520.55 1432.44 1372.33 1366.56 1419.54
65.0 1016.36 1142.84 1174.54 1154.22 1174.54 1142.84 1016.36 905.10 810.28
70.0 826.02 901.63 969.38 1030.10 969.38 901.63 826.02 757.54 739.71
75.0 785.01 888.92 1000.23 1081.83 1000.23 888.92 785.01 688.57 656.85
80.0 756.97 892.80 1077.39 1215.17 1077.39 892.80 756.97 629.36 566.37
85.0 773.02 986.74 1305.15 1492.74 1305.15 986.74 773.02 579.34 475.84
G/C[cd 270.0 285.0 300.0 315.0 330.0 345.0
45.0 2257.01 2071.05 2006.14 1973.64 1951.58 1941.19
50.0 2123.44 1946.26 1872.07 1828.23 1839.72 1968.48
55.0 2010.02 1797.34 1690.63 1665.02 1759.30 1905.20
60.0 1579.63 1419.54 1366.56 1372.33 1432.44 1520.55
65.0 804.02 810.28 905.10 1016.36 1142.84 1174.54
70.0 739.07 739.71 757.54 826.02 901.63 969.38
75.0 657.01 656.85 688.57 785.01 888.92 1000.23
80.0 562.24 566.37 629.36 756.97 892.80 1077.39
85.0 461.69 475.84 579.34 773.02 986.74 1305.15

Claims (28)

1. semi-embedded type lamp comprises:
The housing that is used for the lamp source, this housing are suitable for being embedded in the ceiling so that the lower surface of this housing is basic concordant with ceiling in use; And
Can be installed in the light transmitting cover of this housing below, this lid has:
Main light transmissive surfaces, this main light transmissive surfaces make light can from light source or via reflector by lid be transmitted to the light fixture below the zone and
Less important light transmissive surfaces, this less important light transmissive surfaces make light or be transmitted to the zone of the ceiling that is positioned at light fixture next door by lid via reflector from light source.
2. according to the light fixture of claim 1, it is characterized in that a plurality of parts are arranged this accidental light transmissometer mask so that the regional deflection of the ceiling on next door from the light of light source or reflector incident towards light fixture.
3. according to the light fixture of claim 2, it is characterized in that these a plurality of parts preferably include a plurality of prisms or the lens of being arranged to refracted ray.
4. according to the light fixture of claim 2 or 3, it is characterized in that these a plurality of parts are trihedral prisms, this trihedral prism has a side of the side that is basically perpendicular to lid, and/or a side that is formed by the side of lid and the hypotenuse that constitutes downside.
5. according to the light fixture of claim 3 or 4, it is characterized in that these a plurality of prisms also provide a plurality of reflectings surface, these reflectings surface are angled so that towards the regional reflex of the ceiling on light fixture next door from light source or reflector or the light of incident in the light fixture generally.
6. according to any one light fixture in the claim 3 to 5, it is characterized in that reflecting surface is provided by the upper surface of prism.
7. according to the light fixture of any one claim of front, it is characterized in that, preferably use the general lighting effect of the combination realization light fixture of refraction and reflection.
8. according to the light fixture of any one claim of front, it is characterized in that, via the enough light of less important light transmissive surfaces guiding, so as by directly and the average wall illumination formed of indirect component above the working face be on the working face that is arranged on below the light fixture average level illumination at least 50%.
9. according to the light fixture of any one claim of front, it is characterized in that the average illumination of being made up of direct projection and reflecting component on ceiling is for across at least 30% of the average level illumination of working face.
10. according to the light fixture of any one claim of front, it is characterized in that, the brightness that becomes the position light fixture above 65 ° the elevation angle with vertical plane near but be preferably lower than 1500cd/m2.
11. the light fixture according to any one claim of front is characterized in that, this brightness limit preferably is applied to ceiling and wall.
12. the light fixture according to any one claim of front is characterized in that, this light fixture produces the illumination of 200lux at least on the working face that is arranged at below this light fixture.
13. the light fixture according to any one claim of front is characterized in that, this light fixture produces the illumination of 300-500lux on this working face.
14. the light fixture according to any one claim of front is characterized in that, these a plurality of parts are formed by the array of the prism on the inner surface that is arranged on lid side especially trihedral prism.
15. the light fixture according to claim 14 is characterized in that, these a plurality of parts comprise trihedral prism, and the upper surface of this prism is inclined relative to horizontal 5 ° or bigger angle, but are not more than 30 °.
16. the light fixture according to claim 14 or 15 is characterized in that, the upper surface of this trihedral prism tilts with 10 °-22 ° angle.
17., it is characterized in that the upper surface of this trihedral prism is inclined relative to horizontal the angle of about 16 ° (± 3 °) according to any one light fixture in the claim 14 to 16.
18. according to any one light fixture in the claim 3 to 17, it is characterized in that this trihedral prism is the right angle trihedral prism substantially, its upper surface is formed by the side perpendicular to lid and lower surface limits hypotenuse.
19. the light fixture according to claim 18 is characterized in that, the angle at place, summit between this upper surface and lower surface is 42 °-52 °, more preferably is 45 °-49 ° and is most preferably about 47 °.
20. according to any one light fixture in the claim 9 to 19, it is characterized in that, the lower surface of prism and the angle of horizontal plane are 15 °-47 °, it more preferably is 20 °-42 °, also more preferably be 25 °-37 ° and be most preferably 28 °-34 ° that best angle is for respect to the horizontal plane becoming about 31 °.
21., it is characterized in that to disperse illumination, this illumination comes from refraction or light the reflection on upper surface of light by prism to prism with slightly different angle setting according to any one light fixture in the claim 3 to 20.
22. the light fixture according to any one claim of front is characterized in that, the side of this lid is outwardly-bent so that extend to beyond the foot of housing.
23. the light fixture according to any one claim of front is characterized in that, the lower surface of this lid has crooked profile, and the side of lid reduces to engage the edge of this lower surface smoothly from housing.
24. the light fixture according to any one claim of front is characterized in that, this structure is minimum and can not interfere the spray regime of fire extinguisher from the extended degree of ceiling.
25. the light fixture according to any one claim of front is characterized in that, the lower surface of this lid and side by co-extrusion pressure to form cover part.
26. the light fixture according to any one claim of front is characterized in that, half of the opening of the basic covering shell of this cover part.
27. the light fixture according to any one claim of front is characterized in that, this light fixture uses existing linear fluorescent lamp as light source.
28. the light fixture according to claim 1 is characterized in that, this less important light transmissive surfaces is clearly.
CN2007100922767A 2006-04-03 2007-04-03 Semi-embedded type lamp Expired - Fee Related CN101050847B (en)

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GBGB0606684.9A GB0606684D0 (en) 2006-04-03 2006-04-03 Semi-Recessed Luminaire

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AT (1) ATE419493T1 (en)
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CN104428579B (en) * 2012-06-29 2018-05-29 追踪有限公司 Low profile lighting system
CN105423191A (en) * 2015-12-31 2016-03-23 杭州上达光电科技有限公司 Lamp
CN110873306A (en) * 2018-08-31 2020-03-10 Rab照明设备公司 Apparatus and method for efficiently directing light toward and away from a mounting surface
CN110873306B (en) * 2018-08-31 2022-08-19 Rab照明设备公司 Apparatus and method for efficiently directing light toward and away from a mounting surface
CN110388599A (en) * 2019-09-03 2019-10-29 浙江格瑞普光电科技有限公司 A kind of blackboard lights anti-dazzle light reflecting board and its blackboard lights

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DE602007000419D1 (en) 2009-02-12
EP1843084B1 (en) 2008-12-31
GB0606684D0 (en) 2006-05-10
EP1843084A1 (en) 2007-10-10
ATE419493T1 (en) 2009-01-15

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