GB2289526A - A lighting apparatus capable of emitting light of different frequencies - Google Patents

A lighting apparatus capable of emitting light of different frequencies Download PDF

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Publication number
GB2289526A
GB2289526A GB9409226A GB9409226A GB2289526A GB 2289526 A GB2289526 A GB 2289526A GB 9409226 A GB9409226 A GB 9409226A GB 9409226 A GB9409226 A GB 9409226A GB 2289526 A GB2289526 A GB 2289526A
Authority
GB
United Kingdom
Prior art keywords
housing
lighting apparatus
backing
light
frequency range
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.)
Withdrawn
Application number
GB9409226A
Other versions
GB9409226D0 (en
Inventor
Anthony Hedley Tomlyn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mobil Oil Co Ltd
Original Assignee
Mobil Oil Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mobil Oil Co Ltd filed Critical Mobil Oil Co Ltd
Priority to GB9409226A priority Critical patent/GB2289526A/en
Publication of GB9409226D0 publication Critical patent/GB9409226D0/en
Publication of GB2289526A publication Critical patent/GB2289526A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/013—Housings, e.g. material or assembling of housing parts the housing being an extrusion
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
    • F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
    • F21V19/009—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps the support means engaging the vessel of the source
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Lighting apparatus comprises a housing and a light source disposed within the housing, a first side of the housing being permeable to light of a first pre-selected frequency range, and a second side of the housing being permeable to light of a second predetermined frequency range. The second frequency range is different from the first frequency range. The first side of the housing is opposite to the second side of the housing. <IMAGE>

Description

LIGHTING APPARATUS This invention relates to lighting apparatus.
According to the present invention there is provided lighting apparatus comprising a housing and a light source disposed within the housing, a first side of the housing being permeable to light of a first pre-selected frequency range, and a second side of the housing being permeable to light of a second pre-determined frequency range, wherein the second frequency range is different from the first frequency range, and the first side of the housing is opposite to the second side of the housing.
Preferably the housing is elongate and the two sides of the housing extend along the longitudinal axis thereof. The housing may be formed by extrusion.
Desirably the lighting apparatus further comprises a backing, and the housing is mounted to the backing in such a way that the first side of the housing faces the backing, and the second side of the housing faces away from the backing.
When the lighting apparatus is mounted on the backing, the light passing through the first side of the housing illuminates the backing in a certain colour, while the light passing through the second side of the housing illuminates the visible part of the housing in a different colour. This provides a lighting effect which resembles a strip one colour on another.
The backing is preferably elongate, and the housing is preferably mounted to the backing such that the longitudinal axis of the housing is substantially parallel to the longitudinal axis of the backing.
In the preferred construction the backing comprises a strip having two edges, and the housing is mounted closer to one edge than the other. It is desirable that the cross-section of the strip is arcuate.
In a preferred embodiment the lighting apparatus further comprises a reflector disposed within the housing, said reflector being adapted to reflect light from the light source through the first side of the housing. Preferably, the reflector is adapted to reflect light from the light source towards the edge of the backing remote from the housing.
The first side of the housing may comprise a filter having a colour corresponding to the colour of light in said first frequency range. However, it is preferred that the first frequency range corresponds the the entire frequency range of visible light, in which case the first side of the housing will be substantially transparent.
The second side of the housing preferably comprises a filter having a colour corresponding to the colour of light in said second frequency range. In the most preferred embodiment the filter is permeable only to blue light (ie to light in the frequency range of substantially 610.4 to 711.5 THz).
The light source preferably comprises at least one cold cathode tube. Support means may be provided to support the light source within the housing. The support means preferably comprises an opaque strip.
The lighting apparatus can be used to provide lighting in a wide variety of applications. A particular application is to a fuel service station, where the backing may be already present as part of the service station.
Reference is now made to the accompanying drawings, in which: Figure 1 is a cross sectional view of lighting apparatus according to the invention; Figure 2 is a perspective view of lighting apparatus according to the invention; and Figure 3 is an enlarged view of the lower right hand part of figure 1.
Referring to the drawings a lighting apparatus generally designated 10 comprises an extruded elongate housing 12, a backing 14 (not shown in figure 2 and 3) and a light source 16.
The housing comprises a first side 12a, which faces the backing 14, and a second side 12b, which faces away from the backing 14. The first side 12a is tranparent, while the second side 12b is a filter which permits only blue light to pass therethrough. The housing 12 is made from a plastic acrylic material such as that supplied by ICI under the designation 7021.
The backing 14 comprises an elongate strip and has edges 14a and 14b. The housing 12 is mounted on the backing 14, closer to the lower edge 14a than the upper edge 14b; the mounting can be effected by any known means such as a bracket arrangement (not shown). The backing 14 has an arcuate cross-section: the curve is most pronounced in the region of the upper edge 14b; this feature is provided to improve the illumination of the backing 14, by the light source 16, in the region of the upper edge 14b.
The side of the backing 14 that faces the housing 12 is white.
The light source 16 comprises two triphosphor cold cathode tubes which are disposed in the housing 12. The tubes are arranged such that they can illuminate both the first side 12a and the second side 12b of the housing 12.
The light source 16 is supported by an opaque strip 18, which is fixedly secured to the housing 12; the strip 18 has slot-shaped apertures, which receive the tubes of the light source 16. The strip 18 ensures that there is no direct path of light in the housing between the sides 12a and 12b of the housing, ie so that a person looking into the first side 12a of the housing 12 would not be able to see the second side 12b.
The lighting apparatus 10 also includes a reflector 20, which is disposed in the housing 12, underneath the upper tube of the light source 16, to reflect light from the light source 16 through the first face 12a of the housing 12. The reflector 20 may be configured such that it serves the function of providing the opaque material referred to above.
The primary purpose of the reflector 20 is to reflect a portion of the light upwardly through the first face 12a, towards the upper edge 14b of the backing 14. The reflector 20 may be adjustable, so that the optimum lighting arrangement can be achieved, regardless of the position selected for the housing 12 on the backing 14.
In use, the lighting apparatus 10 causes the backing to be lit up brightly with white light, while also providing the effect of a blue strip of light extending along the backing.
The length of the housing can be about 2m. Several lengths may be placed end to end - see figure 2 where another length 12' is shown. The light output of the lighting apparatus can be of the order of 1100 lumens/m2, with a power consumption of about 100W. The life of the cold cathode tubes is about 60000 hours, which is at least as long as the expected life of the lighting apparatus.
The invention may be modified within the scope of the following claims.

Claims (15)

Claims
1. Lighting apparatus comprising a housing and a light source disposed within the housing, a first side of the housing being permeable to light of a first pre-selected frequency range, and a second side of the housing being permeable to light of a second pre-determined frequency range, wherein the second frequency range is different from the first frequency range, and the first side of the housing is opposite to the second side of the housing.
2. Lighting apparatus according to claim 1, wherein the housing is elongate and the two sides of the housing extend along the longitudinal axis thereof.
3. Lighting apparatus according claim 1 or 2, further comprising a backing, wherein the housing is mounted to the backing in such a way that the first side of the housing faces the backing, and the second side of the housing faces away from the backing.
4. Lighting apparatus according to claim 2 and 3, wherein the backing is elongate, and the housing is mounted to the backing such that the longitudinal axis of the housing is substantially parallel to the longitudinal axis of the backing.
5. Lighting apparatus according to claim 4, wherein the backing comprises a strip having two edges, and the housing is mounted closer to one edge than the other.
6. Lighting apparatus according to claim 5, wherein the crosssection of the strip is arcuate.
7. Lighting apparatus according to claim 3, 4, 5 or 6, wherein the side of the backing facing the housing is white.
8. Lighting apparatus according to any preceding claim, further comprising a reflector disposed within the housing, said reflector being adapted to reflect light from the light source through the first side of the housing.
9. Lighting apparatus according to claim 8, when dependent upon claim 5, wherein said reflector is adapted to reflect light from the light source towards the edge of the backing remote from the housing.
10. Lighting apparatus according to any preceding claim, wherein the first side of the housing comprises a filter having a colour corresponding to the colour of light in said first frequency range.
11. Lighting apparatus according to any one of claims 1 to 9, wherein the first side of the housing is substantially transparent.
12. Lighting apparatus according to any preceding claim, wherein the second side of the housing comprises a filter having a colour corresponding to the colour of light in said second frequency range.
13. Lighting apparatus according to claim 12, wherein said filter is permeable only to blue light.
14. Lighting apparatus according to any preceding claim, wherein the light source comprises at least one cold cathode tube.
15. Lighting apparatus substantially as herein described with reference to and as shown in the accompanying drawings.
GB9409226A 1994-05-10 1994-05-10 A lighting apparatus capable of emitting light of different frequencies Withdrawn GB2289526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9409226A GB2289526A (en) 1994-05-10 1994-05-10 A lighting apparatus capable of emitting light of different frequencies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9409226A GB2289526A (en) 1994-05-10 1994-05-10 A lighting apparatus capable of emitting light of different frequencies

Publications (2)

Publication Number Publication Date
GB9409226D0 GB9409226D0 (en) 1994-06-29
GB2289526A true GB2289526A (en) 1995-11-22

Family

ID=10754829

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9409226A Withdrawn GB2289526A (en) 1994-05-10 1994-05-10 A lighting apparatus capable of emitting light of different frequencies

Country Status (1)

Country Link
GB (1) GB2289526A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010132078A1 (en) * 2009-05-11 2010-11-18 Sloanled, Inc. Low profile extrusion
US8398262B2 (en) 2008-05-09 2013-03-19 The Sloan Company, Inc. Low profile extrusion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984098A (en) * 1962-05-23 1965-02-24 Autopal Np Improvements in or relating to inspection lamps
GB1285472A (en) * 1969-04-22 1972-08-16 World Light Manufactory Ltd Improvements in or relating to lamps
GB2064086A (en) * 1979-11-20 1981-06-10 Willard Developments Ltd Luminaire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984098A (en) * 1962-05-23 1965-02-24 Autopal Np Improvements in or relating to inspection lamps
GB1285472A (en) * 1969-04-22 1972-08-16 World Light Manufactory Ltd Improvements in or relating to lamps
GB2064086A (en) * 1979-11-20 1981-06-10 Willard Developments Ltd Luminaire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8398262B2 (en) 2008-05-09 2013-03-19 The Sloan Company, Inc. Low profile extrusion
WO2010132078A1 (en) * 2009-05-11 2010-11-18 Sloanled, Inc. Low profile extrusion

Also Published As

Publication number Publication date
GB9409226D0 (en) 1994-06-29

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)