EP0435394B1 - Luminaire - Google Patents
Luminaire Download PDFInfo
- Publication number
- EP0435394B1 EP0435394B1 EP90203389A EP90203389A EP0435394B1 EP 0435394 B1 EP0435394 B1 EP 0435394B1 EP 90203389 A EP90203389 A EP 90203389A EP 90203389 A EP90203389 A EP 90203389A EP 0435394 B1 EP0435394 B1 EP 0435394B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- louvre
- luminaire
- strips
- window
- luminous window
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
- F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
Definitions
- the invention relates to a luminaire comprising:
- Such luminaires are generally known.
- a louvre attachment for such a luminaire is described, for example, in US 4,268,897 and in US 4,429,354.
- each louvre strip is in the base of the triangle in the known attachments. This is a logical location because this seam is then invisible, irrespective from which position the luminaire is viewed.
- the louvre strips do not have an apex angle in the proper sense of the word in their cross-sections, but they are rounded off instead, since bending is only possible with a certain radius of curvature.
- a disadvantage of this is that the effective size of the luminous window is restricted by the apexes of the louvre strips. The larger the number of strips per unit length of the lamp, the stronger the restriction of the effective size of the luminous window.
- the effective size of the luminous window is here understood to mean the actual light transmitting opening of this window.
- CH 539, 239 discloses louvre attachments made of synthetic material.
- Each louvre strip has a slot with multiple interruptions at its apex so as to form openings through which air may be blown to ventilate the space in which the attachment is used.
- the invention has for its object inter alia to provide a luminaire of the kind described in the opening paragraph having a louvre attachment of a simple construction in which the luminous window has a great effective size, while nevertheless damage to the finish of the louvre strips in the luminous window is avoided.
- this object is achieved in that the louvre strips have their seams in the luminous window and in that the lateral edge portions of each louvre strip lie sideways against one another.
- the louvre strips have a dimension of not more than twice the thickness of the material from which they were formed, measured in longitudinal direction of the lamp at the level of the luminous window. Not only is a louvre strip very thin in this location as a result, and the size of the luminous window very great, but the material is not bent in the luminous window either, so that damage to a reflecting layer, for example an anodized layer, is avoided.
- the construction is especially suitable for use in luminaires and attachments with optical reflector systems.
- the louvre strips need only be folded about lines which lie at a distance from one another, i.e. in order to shape the base of the triangular cross-section. This makes it possible to give the strips an accurate, pre-determined shape, the more so since the lateral edge portions lie sideways against one another. Such an accurate shape could not be realised if the strips, for example, should have had a circularly bent surface remote from the luminous window instead of a surface coinciding with the base of a triangle.
- the lateral edge portions bear on one another under pressure for extra stability.
- This pressure may be generated through elastic deformation in the louvre strip material.
- the surface remote from the luminous window may give local reflections onto other mirroring surfaces, especially in reflectorizing louvre attachments, for example on the first and the second reflector.
- this effect is counteracted by means of several tongues which have been punched from said surface and pressed to the outside. It is favourable if the tongues belong to a first and a second series, which point in mutually opposing directions. The series may be positioned separately or intermixed.
- the luminaire of Fig. 1 has a housing 1 comprising a luminous window 2 and means 3 for holding an elongate lamp having a longitudinal direction 4 in said housing 1 along said window 2 and for connecting said lamp to a supply source, the means 3 defining the said longitudinal direction 4.
- these means 3 are formed by a pair of conventional holders for a straight, tubular low-pressure mercury vapour fluorescent lamp.
- a U-shaped bent fluorescent lamp or a fluorescent lamp consisting of parallel series-connected closed tube sections could be used in a luminaire of adapted dimensions, the luminaire comprising means suitable for holding and connecting the lamp in question.
- the luminaire may be provided with means for accommodating several lamps with the same longitudinal direction.
- the luminaire has a metal louvre attachment 5 in the luminous window 2.
- the attachment 5 has (see also Fig. 2) a first 6 and a second reflector 7 in the longitudinal direction 4 of the lamp, which reflectors are interconnected by several parallel louvre strips 8 (see also Fig. 4) having seams 10, which are folded in cross-section into a substantially triangular shape from a strip with lateral edge portions 9.
- the triangle of the cross-section has its apex 11 in the luminous window 2 and its base in a plane 12 remote from the luminous window inside the housing. Its legs 13 are curved towards eachother.
- the degree of curvature is immaterial for the nature of the invention and may be very slight or considerable, subject to the optical specification of the luminaire.
- the louvre strips 8, according to the invention, have their seams 10 in the luminous window 2 and the lateral edge portions 9 of each strip 8 lie sideways against one another.
- the lateral edge portions 9 bear on one another with pressure through elastic deformation of the louvre strip material, for example anodized aluminium.
- tongues 14 are punched from the surface 12 of the louvre strips 8 remote from the luminous window 2 and bent outwards.
- the tongues 14 belong to a first series 15 or to a second series 16, which point in mutually opposing directions and are positioned separately.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Lasers (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
Abstract
Description
- The invention relates to a luminaire comprising:
- a housing with a luminous window,
- means for holding an elongate lamp having a longitudinal direction in said housing along said window and for connecting it to a supply source, which means define said longitudinal direction,
- a metal louvre attachment in the luminous window comprising a first and a second reflector in the longitudinal direction of the lamp, interconnected by several parallel louvre strips having seams, which strips are bent in cross-section substantially into a triangle from a strip with lateral edge portions, which triangle has its apex in the luminous window and its base in a plane inside the housing remote from the luminous window, and whose legs are curved towards eachother.
- Such luminaires are generally known. A louvre attachment for such a luminaire is described, for example, in US 4,268,897 and in US 4,429,354.
- In the known attachments the seam of each louvre strip is in the base of the triangle in the known attachments. This is a logical location because this seam is then invisible, irrespective from which position the luminaire is viewed.
- It has been found that such attachments can have an uneven luminance, which differs from place to place. This is connected with deviations in shape from one louvre strip to another. It was found that cross-sections of mutually differing shapes also occur in such a louvre strip between its ends. These differences in shape may be caused by differences in strain in the various cross-sections of a louvre strip, but also by inhomogeneities in the material from which louvre strips are formed.
- The louvre strips do not have an apex angle in the proper sense of the word in their cross-sections, but they are rounded off instead, since bending is only possible with a certain radius of curvature. A disadvantage of this is that the effective size of the luminous window is restricted by the apexes of the louvre strips. The larger the number of strips per unit length of the lamp, the stronger the restriction of the effective size of the luminous window. The effective size of the luminous window is here understood to mean the actual light transmitting opening of this window.
- It has been found that it is not useful to maximize the effective size of the luminous window by making the louvre strips as thin as possible at their apexes by bending them with a very small radius of curvature. It was in fact demonstrated that the finish of the strips is damaged by this. Paint or gloss layers may develop cracks or even flake-off. Especially gloss layers, such as the oxide skin of anodized aluminium, as a result give a glittering effect which strongly detracts from the quality of the attachment, and thus of the luminaire.
- CH 539, 239 discloses louvre attachments made of synthetic material. Each louvre strip has a slot with multiple interruptions at its apex so as to form openings through which air may be blown to ventilate the space in which the attachment is used.
- The invention has for its object inter alia to provide a luminaire of the kind described in the opening paragraph having a louvre attachment of a simple construction in which the luminous window has a great effective size, while nevertheless damage to the finish of the louvre strips in the luminous window is avoided.
- According to the invention, this object is achieved in that the louvre strips have their seams in the luminous window and in that the lateral edge portions of each louvre strip lie sideways against one another.
- Thanks to their shape, the louvre strips have a dimension of not more than twice the thickness of the material from which they were formed, measured in longitudinal direction of the lamp at the level of the luminous window. Not only is a louvre strip very thin in this location as a result, and the size of the luminous window very great, but the material is not bent in the luminous window either, so that damage to a reflecting layer, for example an anodized layer, is avoided. Thus the construction is especially suitable for use in luminaires and attachments with optical reflector systems.
- An important advantage, furthermore, is that the louvre strips need only be folded about lines which lie at a distance from one another, i.e. in order to shape the base of the triangular cross-section. This makes it possible to give the strips an accurate, pre-determined shape, the more so since the lateral edge portions lie sideways against one another. Such an accurate shape could not be realised if the strips, for example, should have had a circularly bent surface remote from the luminous window instead of a surface coinciding with the base of a triangle.
- In a favourable embodiment, the lateral edge portions bear on one another under pressure for extra stability. This pressure may be generated through elastic deformation in the louvre strip material.
- The surface remote from the luminous window may give local reflections onto other mirroring surfaces, especially in reflectorizing louvre attachments, for example on the first and the second reflector. In a favourable embodiment, this effect is counteracted by means of several tongues which have been punched from said surface and pressed to the outside. It is favourable if the tongues belong to a first and a second series, which point in mutually opposing directions. The series may be positioned separately or intermixed.
- These and other aspects of the luminaire according to the invention are described and explained with reference to the drawing.
- Fig. 1 shows a luminaire in perspective,
- Fig. 2 shows a cross-section of the louvre attachment taken on the line II-II,
- Fig. 3 shows a side elevation of a louvre strip, and
- Fig. 4 shows a cross-section taken on the line IV-IV in Fig. 3.
- The luminaire of Fig. 1 has a
housing 1 comprising a luminous window 2 and means 3 for holding an elongate lamp having a longitudinal direction 4 in saidhousing 1 along said window 2 and for connecting said lamp to a supply source, themeans 3 defining the said longitudinal direction 4. - In the Figure, these means 3 are formed by a pair of conventional holders for a straight, tubular low-pressure mercury vapour fluorescent lamp. Alternatively, a U-shaped bent fluorescent lamp or a fluorescent lamp consisting of parallel series-connected closed tube sections could be used in a luminaire of adapted dimensions, the luminaire comprising means suitable for holding and connecting the lamp in question. Alternatively again, the luminaire may be provided with means for accommodating several lamps with the same longitudinal direction.
- The luminaire has a
metal louvre attachment 5 in the luminous window 2. Theattachment 5 has (see also Fig. 2) a first 6 and a second reflector 7 in the longitudinal direction 4 of the lamp, which reflectors are interconnected by several parallel louvre strips 8 (see also Fig. 4) havingseams 10, which are folded in cross-section into a substantially triangular shape from a strip withlateral edge portions 9. The triangle of the cross-section has itsapex 11 in the luminous window 2 and its base in aplane 12 remote from the luminous window inside the housing. Itslegs 13 are curved towards eachother. The degree of curvature is immaterial for the nature of the invention and may be very slight or considerable, subject to the optical specification of the luminaire. - The louvre strips 8, according to the invention, have their
seams 10 in the luminous window 2 and thelateral edge portions 9 of eachstrip 8 lie sideways against one another. Thelateral edge portions 9 bear on one another with pressure through elastic deformation of the louvre strip material, for example anodized aluminium. -
Several tongues 14 are punched from thesurface 12 of the louvre strips 8 remote from the luminous window 2 and bent outwards. Thetongues 14 belong to afirst series 15 or to asecond series 16, which point in mutually opposing directions and are positioned separately.
Claims (5)
- A luminaire comprising:- a housing (1) with a luminous window (2),- means (3) for holding an elongate lamp having a longitudinal direction (4) in said housing along said window (2) and for connecting it to a supply source, which means define said longitudinal direction,- a metal louvre attachment (5) in the luminous window (2) comprising a first (6) and a second reflector (7) in the longitudinal direction (4) of the lamp, interconnected by several parallel louvre strips (8) having seams (10), which strips are bent in cross-section substantially into a triangle from a strip with lateral edge portions (9), which triangle has its apex (11) in the luminous window (2) and its base in a plane (12) inside the housing (1) remote from the luminous window, and whose legs (13) are curved toward eachother,characterized in that the louvre strips (8) have their seams (10) in the luminous window (2) and in that the lateral edge portions (9) of each louvre strip (8) lie sideways against one another.
- A luminaire as claimed in Claim 1, characterized in that the lateral edge portions (9) bear on one another with pressure.
- A luminaire as claimed in Claim 2, characterized in that the louvre strips (8) have a reflecting layer.
- A luminaire as claimed in Claim 3, characterized in that the surface (12) of the louvre strips (8) remote from the luminous window (2) have several tongues (14) punched from this surface and bent outwards.
- A luminaire as claimed in Claim 4, characterized in that the tongues (14) belong to a first (15) and a second series (16) which point in mutually opposing directions.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8903160 | 1989-12-27 | ||
NL8903160 | 1989-12-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0435394A1 EP0435394A1 (en) | 1991-07-03 |
EP0435394B1 true EP0435394B1 (en) | 1994-12-07 |
Family
ID=19855832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90203389A Expired - Lifetime EP0435394B1 (en) | 1989-12-27 | 1990-12-18 | Luminaire |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0435394B1 (en) |
AT (1) | ATE115257T1 (en) |
DE (1) | DE69014844T2 (en) |
DK (1) | DK0435394T3 (en) |
ES (1) | ES2066960T3 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4243659A1 (en) * | 1992-12-23 | 1994-06-30 | Licentia Gmbh | Metal grid for a lamp |
EP0643259B1 (en) * | 1993-09-09 | 1999-12-08 | Veko Products B.V. | A cross lamella for a light box |
NL9301557A (en) * | 1993-09-09 | 1995-04-03 | Simon Cornelis Van Putten | Transverse lamella for a light box |
NL9402049A (en) * | 1994-12-06 | 1996-07-01 | Etap Nv | Lighting fixture |
US5526241A (en) * | 1994-12-27 | 1996-06-11 | Ferrell; Richard | Interior lamp for motor vehicle |
WO1996025623A1 (en) * | 1995-02-14 | 1996-08-22 | Philips Electronics N.V. | Luminaire |
DE29609669U1 (en) * | 1996-02-08 | 1996-08-29 | Philips Electronics Nv | lamp |
DE19612197A1 (en) * | 1996-03-27 | 1997-10-02 | Zumtobel Licht | Method for producing a reflector for a lamp that is V-shaped in cross section and a reflector that is V-shaped in cross section |
SE507223C2 (en) * | 1997-04-04 | 1998-04-27 | Fagerhults Ab | Methods of producing an aperture cover, a reflector or the like for an electric lighting fixture and an aperture cover, a reflector or the like, manufactured according to the method |
GB2341669A (en) * | 1998-09-15 | 2000-03-22 | Interlux Limited | Light controller for light fitting |
EP1113219B1 (en) | 1999-12-27 | 2008-01-02 | Ludwig Leuchten KG | Lamp |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2617919A (en) * | 1947-09-17 | 1952-11-11 | Revere Copper & Brass Inc | Laterally expansible lighting fixture and part therefor |
DE2833894C2 (en) * | 1978-08-02 | 1980-07-31 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Luminaire for a tubular fluorescent lamp |
US4407011A (en) * | 1980-12-08 | 1983-09-27 | Donn Incorporated | Integrated lighting systems for suspended ceilings or the like |
DE3519498A1 (en) * | 1985-05-31 | 1986-12-04 | Wolfgang 7000 Stuttgart Schäffler | Reflector element for fluorescent tubes which resembles a parabolic mirror |
-
1990
- 1990-12-18 AT AT90203389T patent/ATE115257T1/en not_active IP Right Cessation
- 1990-12-18 ES ES90203389T patent/ES2066960T3/en not_active Expired - Lifetime
- 1990-12-18 DE DE69014844T patent/DE69014844T2/en not_active Expired - Lifetime
- 1990-12-18 DK DK90203389.3T patent/DK0435394T3/en active
- 1990-12-18 EP EP90203389A patent/EP0435394B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2066960T3 (en) | 1995-03-16 |
EP0435394A1 (en) | 1991-07-03 |
DE69014844T2 (en) | 1995-06-29 |
DK0435394T3 (en) | 1995-05-01 |
ATE115257T1 (en) | 1994-12-15 |
DE69014844D1 (en) | 1995-01-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4229782A (en) | High efficiency lighting units with beam cut-off angle | |
US4388675A (en) | Indirect lighting fixture | |
NL192273C (en) | Lighting fixture. | |
EP0435394B1 (en) | Luminaire | |
US4344111A (en) | High efficiency lighting units and systems using same | |
US7156540B2 (en) | Lighting fixture including two reflectors | |
US5921666A (en) | Ellipsoidal slot light | |
TW424871U (en) | Luminaire | |
US5412551A (en) | Luminaire fixture | |
CA2180712C (en) | Lighting fixture having a parabolic louver | |
ES2318279T3 (en) | LUMINARY. | |
US7108398B2 (en) | Luminaire and lamellae grid | |
US6170962B1 (en) | Dual compound reflector for fluorescent light fixtures | |
US5884993A (en) | Reflector systems for lighting fixtures | |
US8118453B2 (en) | Luminaire and lamellae louver therefor | |
US6254255B1 (en) | Luminaire | |
EP1376008B1 (en) | Lighting device | |
EP1472491B1 (en) | Luminaire with lamellas, for tubular lamp | |
US6164798A (en) | Asymmetrical compound reflectors for fluorescent light fixtures | |
JP3391483B2 (en) | light box | |
TW200413669A (en) | Luminaire and lamellae louver therefor | |
EP0833100A2 (en) | Luminaire | |
WO1992016790A1 (en) | Parabolic deflector | |
MX9604847A (en) | Luminaire. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE DK ES FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19911219 |
|
17Q | First examination report despatched |
Effective date: 19930903 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE DE DK ES FR GB IT NL SE |
|
REF | Corresponds to: |
Ref document number: 115257 Country of ref document: AT Date of ref document: 19941215 Kind code of ref document: T |
|
BECN | Be: change of holder's name |
Effective date: 19941207 |
|
REF | Corresponds to: |
Ref document number: 69014844 Country of ref document: DE Date of ref document: 19950119 |
|
ITF | It: translation for a ep patent filed |
Owner name: ING. C. GREGORJ S.P.A. |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2066960 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
K1C1 | Correction of patent application (title page) published |
Effective date: 19910703 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: PC2A |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20011211 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20011218 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021219 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030131 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20021219 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20091228 Year of fee payment: 20 Ref country code: AT Payment date: 20091221 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20091224 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20100107 Year of fee payment: 20 Ref country code: GB Payment date: 20091230 Year of fee payment: 20 Ref country code: IT Payment date: 20091222 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20100129 Year of fee payment: 20 Ref country code: DE Payment date: 20100225 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: V4 Effective date: 20101218 |
|
BE20 | Be: patent expired |
Owner name: *KONINKLIJKE PHILIPS ELECTRONICS N.V. Effective date: 20101218 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20101217 |
|
EUG | Se: european patent has lapsed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20101218 Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20101217 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20101218 |