WO2004090586A1 - Luminous diffuser with differentiated light emitting parts for lighting equipment - Google Patents

Luminous diffuser with differentiated light emitting parts for lighting equipment Download PDF

Info

Publication number
WO2004090586A1
WO2004090586A1 PCT/IT2004/000157 IT2004000157W WO2004090586A1 WO 2004090586 A1 WO2004090586 A1 WO 2004090586A1 IT 2004000157 W IT2004000157 W IT 2004000157W WO 2004090586 A1 WO2004090586 A1 WO 2004090586A1
Authority
WO
WIPO (PCT)
Prior art keywords
diffuser
front plate
holes
lighting equipment
light
Prior art date
Application number
PCT/IT2004/000157
Other languages
French (fr)
Inventor
Antonio Citterio
Original Assignee
Flos S.P.A.
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 Flos S.P.A. filed Critical Flos S.P.A.
Priority to EP04724110A priority Critical patent/EP2113090A1/en
Priority to US10/518,804 priority patent/US7165868B2/en
Priority to JP2006507644A priority patent/JP2006522447A/en
Publication of WO2004090586A1 publication Critical patent/WO2004090586A1/en

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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/14—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures with many small apertures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0247—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of voids or pores
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency

Definitions

  • This invention concerns lighting equipment in general and refers in particular to a light diffuser for such equipment.
  • Lighting equipment in particular if large, usually includes several light sources inside a housing and a light diffuser opposite those sources. Often, however, lighting equipment is more luminous in those parts in line with the internal light sources and less in the other parts further from the light sources.
  • One of the objects of this invention is to overcome this drawback so as to even out the emission of light in lighting equipment using a front diffuser.
  • Another object of the invention is to provide a light diffuser which enables a uniform light emission for all its wideness, even in the presence of local and distant light sources inside its body.
  • a further object of the invention is to provide a light diffuser configured to mask, in some of its parts, the wiring components, which would otherwise be visible from the outside of the body and be aesthetically unacceptable.
  • lighting equipment comprising several light sources, and wherein a light diffuser is formed by a front plate with holes positioned uniformly on all its surface and of an internal sheet associated with the internal surface of the front plate and having holes with different diameters in different parts of its length, positioned in line with the openings of the front plate itself.
  • Fig.1 shows an example of lighting equipment incorporating the light diffuser according to the invention
  • Figs. 2 and 3 show, respectively, a view of only the front plate and a view of the internal sheet of the light diffuser
  • Fig.4 shows a longitudinal section of the lighting equipment.
  • the lighting equipment includes a body or housing 11, which holds a number of light sources 12 suitably supported and wired and which is closed at the front by a light diffuser 13.
  • the light sources may be made up of any type of light and with sizes compatible with those of the lighting equipment.
  • the light diffuser 13 is composed of a front plate, that is external 14 and an internal sheet 13 directly associated with the front plate.
  • the front plate 14 is crossed by a multitude of holes or openings 16 all of the same width along all its length.
  • the holes or openings 16 are uniformly distributed and are, for example, but not necessarily, honey-combed - Figs 1 and 2.
  • the internal sheet 15 may be made Up, as shown in the example in Fig. 3, of an element on its own, in the shape of a second sheet or a film, which can be applied to the internal surface of the front plate 14. But preferably the internal sheet can be obtained together with the front plate 14 in order to form in this case an integral part with said front plate.
  • the internal sheet 15 has holes 17 of different diameters in various parts, as can be seen in Fig. 3. .
  • Each hole 17 of the internal sheet 15, whatever its size, is positioned in line with a hole or opening 16 in the front plate 14.
  • the internal sheet has holes 17 of a set diameter in the parts in line with the light sources, holes 17' of a larger diameter in the parts distant from the light sources and between them, and smaller holes 17" along the edges of the diffuser.
  • holes 17 and 17' thus enable, even in the presence of equally sized holes or opening 16 in the front plate 14, to even out the light emission through the diffuser 13 even from the parts distant from the light sources, whereas the smaller holes 17" help to hide the internal supports and wiring of the light sources so that they are no longer visible through the front plate.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

This invention concerns a light diffuser for lighting equipments which is made up of a front plate (14) with holes or openings (16) distributed uniformly over all its surface, and an internal sheet (15) associated with the internal surface of the front plate and having holes of a different diameter (17, 17’, 17’’) along different parts of its length and each positioned in line with an opening in the front plate. The front plate and the internal sheet may be two associated bodies or form a single integrated body.

Description

" LUMINOUS DIFFUSER WITH DIFFERENTIATED LIGHT EMITTING PARTS FOR LIGHTING EQUIPMENT"
* * * *
Filed of the invention
This invention concerns lighting equipment in general and refers in particular to a light diffuser for such equipment. Prior Art
Lighting equipment, in particular if large, usually includes several light sources inside a housing and a light diffuser opposite those sources. Often, however, lighting equipment is more luminous in those parts in line with the internal light sources and less in the other parts further from the light sources. Objects of the Invention
One of the objects of this invention is to overcome this drawback so as to even out the emission of light in lighting equipment using a front diffuser.
Another object of the invention is to provide a light diffuser which enables a uniform light emission for all its wideness, even in the presence of local and distant light sources inside its body.
A further object of the invention is to provide a light diffuser configured to mask, in some of its parts, the wiring components, which would otherwise be visible from the outside of the body and be aesthetically unacceptable.
These objects and implicit advantages deriving from them are achieved by lighting equipment comprising several light sources, and wherein a light diffuser is formed by a front plate with holes positioned uniformly on all its surface and of an internal sheet associated with the internal surface of the front plate and having holes with different diameters in different parts of its length, positioned in line with the openings of the front plate itself. Brief Description of the Drawings
Further details of the invention will however become more evident from the description that follows made with reference to the attached drawings, which are indicative and not limiting, in which:
Fig.1 shows an example of lighting equipment incorporating the light diffuser according to the invention;
Figs. 2 and 3 show, respectively, a view of only the front plate and a view of the internal sheet of the light diffuser; and
Fig.4 shows a longitudinal section of the lighting equipment.
Detailed Description of the Invention
As shown, the lighting equipment includes a body or housing 11, which holds a number of light sources 12 suitably supported and wired and which is closed at the front by a light diffuser 13.
The light sources may be made up of any type of light and with sizes compatible with those of the lighting equipment.
The light diffuser 13 is composed of a front plate, that is external 14 and an internal sheet 13 directly associated with the front plate. The front plate 14 is crossed by a multitude of holes or openings 16 all of the same width along all its length. The holes or openings 16 are uniformly distributed and are, for example, but not necessarily, honey-combed - Figs 1 and 2.
The internal sheet 15 may be made Up, as shown in the example in Fig. 3, of an element on its own, in the shape of a second sheet or a film, which can be applied to the internal surface of the front plate 14. But preferably the internal sheet can be obtained together with the front plate 14 in order to form in this case an integral part with said front plate.
Whatever the case, the internal sheet 15 has holes 17 of different diameters in various parts, as can be seen in Fig. 3. . Each hole 17 of the internal sheet 15, whatever its size, is positioned in line with a hole or opening 16 in the front plate 14.
More precisely, the internal sheet has holes 17 of a set diameter in the parts in line with the light sources, holes 17' of a larger diameter in the parts distant from the light sources and between them, and smaller holes 17" along the edges of the diffuser.
The differences in holes 17 and 17' thus enable, even in the presence of equally sized holes or opening 16 in the front plate 14, to even out the light emission through the diffuser 13 even from the parts distant from the light sources, whereas the smaller holes 17" help to hide the internal supports and wiring of the light sources so that they are no longer visible through the front plate.

Claims

" LUMINOUS DIFFUSER WITH DIFFERENTIATED LIGHT EMITTING PARTS FOR LIGHTING EQUIPMENT"* * * *CLAIMS
1. Light diffuser for lighting equipments which comprising a body or housing (11) enclosing a number of light sources (12) suitably supported and wired and front a light diffuser (13), in a front part of said body or housing, characterised in that the light diffuser is made up of a front plate (14) having holes or openings (16) uniformly distributed over all its surface, and an internal sheet (15) associated with an internal surface of the front plate and having holes of different diameters (17, 17', 17") in different parts of its surface and each hole positioned in line with an opening in the front plate.
2. Light diffuser for lighting equipment according to claim 1 , in which the front plate (14) and the internal sheet (15) are formed by two respective elements resting and fixed one against the other.
3. Light diffuser for lighting equipment according to claim 1 , in which the front plate (14) and the internal sheet (15) form a single integrated unit.
4. Light diffuser for lighting equipment according to claims 1 , and 2 or 3, in which the front plate (14) is perforated by a multitude of holes or openings (16) all equal in size and over all its length, and in which the internal sheet (15) has holes (17) with a set diameter in the parts in line with the light sources, other holes (17') of a larger size in the parts distant from the light sources and among these, other smaller holes (17") along the edges of the diffuser.
5. Lighting equipment comprising a body or housing (11) enclosing several light sources (12) suitably supported and wired and closed at the front by a light diffuser (13), characterised in that said diffuser is made up of a front plate (14) with holes or openings (16) uniformly positioned over all its surface, and of one internal sheet (15) associated with the internal surface of the front plate and having holes with different diameters (17, 17', 17") in different parts of its surface and each positioned in line with an opening in the front plate.
6. Lighting equipment according to claim 5, in which the front plate (14) and the internal sheet (15) of the diffuser are made up of due respective elements resting and fixed one against the other.
7. Lighting equipment according to claim 5, in which the front plate (14) and the internal sheet (15) of the diffuser form a single integral body.
8. Lighting equipment according to claims 5,6, or 7, in which the front plate (14) of the diffuser is perforated for all its length, by a multitude of holes or openings (16) all equal in size, and in which the internal sheet (15) of the diffuser has holes (17) of a set diameter in the parts in line with the light sources, other larger holes (17') in the parts distant from the light sources and among these further smaller holes (17") along the edges of the diffuser.
PCT/IT2004/000157 2003-04-07 2004-03-29 Luminous diffuser with differentiated light emitting parts for lighting equipment WO2004090586A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04724110A EP2113090A1 (en) 2003-04-07 2004-03-29 Luminous diffuser with differentiated light emitting parts for lighting equipment
US10/518,804 US7165868B2 (en) 2003-04-07 2004-03-29 Luminous diffuser with differentiated light emitting parts for lighting equipment
JP2006507644A JP2006522447A (en) 2003-04-07 2004-03-29 Luminescent diffuser for luminaire with non-uniform light emitting part

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000037U ITBS20030037U1 (en) 2003-04-07 2003-04-07 LUMINOUS DIFFUSER WITH DIFFERENTIATED LIGHT EMISSION PARTS FOR AP LIGHTING EQUIPMENT
ITBS2003U000037 2003-04-07

Publications (1)

Publication Number Publication Date
WO2004090586A1 true WO2004090586A1 (en) 2004-10-21

Family

ID=33156328

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2004/000157 WO2004090586A1 (en) 2003-04-07 2004-03-29 Luminous diffuser with differentiated light emitting parts for lighting equipment

Country Status (7)

Country Link
US (1) US7165868B2 (en)
EP (1) EP2113090A1 (en)
JP (1) JP2006522447A (en)
KR (1) KR20050120571A (en)
CN (1) CN100356201C (en)
IT (1) ITBS20030037U1 (en)
WO (1) WO2004090586A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011131476A1 (en) * 2010-04-23 2011-10-27 Osram Opto Semiconductors Gmbh Surface light source

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100465734C (en) * 2006-01-24 2009-03-04 中华映管股份有限公司 Diffusing board structure of back lighting module
KR101315467B1 (en) * 2006-11-29 2013-10-04 삼성전자주식회사 Backlight unit and display apparatus comprising the same
CN103436850B (en) * 2013-06-27 2015-09-16 苏州求是真空电子有限公司 A kind of ultraviolet supplementary unit of reaction magnetocontrol sputtering plated film
US10274783B2 (en) 2017-05-05 2019-04-30 Pelka & Associates, Inc. Direct-view LED backlight with gradient reflective layer
US20200132272A1 (en) * 2018-10-25 2020-04-30 Michael Turner Ceiling light fixture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505250A (en) * 1937-11-03 1939-05-03 Cinescope Publicity Company Lt Improvements relating to advertising or like signs
US4651012A (en) * 1985-03-21 1987-03-17 Martin Marietta Corporation High brilliance lensless projection system of test patterns
US4665036A (en) * 1984-06-04 1987-05-12 Bayer Aktiengesellschaft Illuminating device for the optical, particularly image-analytical evaluation of microbiological objects
DE4311013A1 (en) * 1992-03-31 1993-10-07 Osram Fabrikken A S Drammen Light diffuser for publicity display panel or LCD back-light - has flat plate in front of light tube with aperture fields providing increasing transparency with distance from light tube
US5954423A (en) * 1997-05-02 1999-09-21 Nsi Enterprises, Inc. Light distribution diffuser for exit signs and the like illuminated by LED arrays

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US3869615A (en) * 1973-06-28 1975-03-04 Nasa Multiplate focusing collimator
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JPH02148606A (en) * 1988-11-30 1990-06-07 Toshiba Lighting & Technol Corp Lighting apparatus
JPH0623083U (en) * 1992-08-28 1994-03-25 株式会社ジェフア A device for eliminating light / shade of fluorescent light in a signboard
JPH06130384A (en) * 1992-10-22 1994-05-13 Kuraray Co Ltd Surface type lighting device
JPH09236803A (en) * 1996-02-28 1997-09-09 Victor Co Of Japan Ltd Back light for liquid crystal display
JPH09306213A (en) * 1996-05-10 1997-11-28 Matsushita Electric Works Ltd Luminaire
JP2002319309A (en) * 2001-04-23 2002-10-31 Michiharu Yoshimatsu Louver for lighting system
JP2003123526A (en) * 2001-10-17 2003-04-25 Tootasu Japan:Kk Surface light source uniformizing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505250A (en) * 1937-11-03 1939-05-03 Cinescope Publicity Company Lt Improvements relating to advertising or like signs
US4665036A (en) * 1984-06-04 1987-05-12 Bayer Aktiengesellschaft Illuminating device for the optical, particularly image-analytical evaluation of microbiological objects
US4651012A (en) * 1985-03-21 1987-03-17 Martin Marietta Corporation High brilliance lensless projection system of test patterns
DE4311013A1 (en) * 1992-03-31 1993-10-07 Osram Fabrikken A S Drammen Light diffuser for publicity display panel or LCD back-light - has flat plate in front of light tube with aperture fields providing increasing transparency with distance from light tube
US5954423A (en) * 1997-05-02 1999-09-21 Nsi Enterprises, Inc. Light distribution diffuser for exit signs and the like illuminated by LED arrays

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011131476A1 (en) * 2010-04-23 2011-10-27 Osram Opto Semiconductors Gmbh Surface light source
CN102859273A (en) * 2010-04-23 2013-01-02 欧司朗光电半导体有限公司 Surface light source
US9176268B2 (en) 2010-04-23 2015-11-03 Osram Opto Semiconductors Gmbh Surface light source

Also Published As

Publication number Publication date
JP2006522447A (en) 2006-09-28
CN100356201C (en) 2007-12-19
KR20050120571A (en) 2005-12-22
ITBS20030037U1 (en) 2004-10-08
EP2113090A1 (en) 2009-11-04
US7165868B2 (en) 2007-01-23
US20050226001A1 (en) 2005-10-13
CN1697983A (en) 2005-11-16

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