AU3899201A - Illumination ring - Google Patents
Illumination ring Download PDFInfo
- Publication number
- AU3899201A AU3899201A AU38992/01A AU3899201A AU3899201A AU 3899201 A AU3899201 A AU 3899201A AU 38992/01 A AU38992/01 A AU 38992/01A AU 3899201 A AU3899201 A AU 3899201A AU 3899201 A AU3899201 A AU 3899201A
- Authority
- AU
- Australia
- Prior art keywords
- illumination ring
- light
- light source
- ring
- illumination
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/20—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for lighting specific fittings of passenger or driving compartments; mounted on specific fittings of passenger or driving compartments
- B60Q3/292—Ignition locks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- 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
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0018—Redirecting means on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
- Planar Illumination Modules (AREA)
Description
Regulation 3.2
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
(ORIGINAL)
BP Australia Documents received on 3 0 APH 2001 c NCD Batch No: 0 Name of Applicant: Actual Inventors: Address for Service: Invention Title: Robert Bosch GmbH of Postfach 30 02 20, D-70442 Stuttgart, Germany.
FARRELL, Simon MCKNIGHT, Matthew DAVIES COLLISON CAVE, Patent Attorneys, 1 Little Collins Street, Melbourne, Victoria 3000.
"Illumination ring" Details of Associated Provisional Application No: PR3367/01 The following statement is a full description of this invention, including the best method of performing it known to us: P:NOPER\SSBbmhsp=mp.dm-30/04/01 -2- ILLUMINATION
RING
The present invention generally relates to illumination rings for use in the ignition shaft area of automobiles.
Illumination rings are used in combination with a light source to illuminate the area around the locking shaft into which an ignition key is inserted. This makes it easier for the driver of an automobile entering the automobile in darkness to locate the correct place to insert the ignition key in darkness.
Prior art illumination rings, also known as light rings, use a small light globe or, as described in US Patent No. 5039832, a plurality of light emitting diodes (LEDs). Light *'.from such a light source is generally refracted around the illumination ring housing for the purpose of providing illumination to the outwardly exposed surface of the illumination ring for making the ignition key hole more visible to the driver. Typically, there is an uneven distribution of light within the illumination ring, as the light source is located closer to one side of the exposed surface than to the other, resulting in contrasting brightness levels on "the exposed surface.
20 It is an object of the invention to provide an illumination ring having a more even distribution of light provided to the exposed outer surface of the illumination ring. This object is met by the feature of the light diffusing portion having a varying angular profile, such that the angle of the light diffusing portion relative to the outer surface changes depending on the distance of the relevant part of the light diffusing portion from the light source.
The present invention provides an illumination ring having an outer surface and a light diffusing portion, characterised in that the light diffusing portion has a graduated angular profile for facilitating communication of light from a light source towards the outer surface.
P:\OPER\SSB\bchspomp.doc-30i04/01 -3- The present invention also provides an illumination ring having an outer surface for transmitting light therethrough from a light source located, in use of the illumination ring, adjacent the illumination ring and having a light diffusing portion for facilitating communication of light from the light source to the outer surface, characterised in that an angle of the light diffusing portion relative to the outer surface depends on the distance of a relevant portion of the light diffusing portion from the light source.
The term "graduated" as used above to describe the angular profile should be understood to have a broad meaning so as to include angular profiles of a non-consistent or otherwise o 10 varying nature and not necessarily of a stepped graduating nature. The graduation of the angular profile is, however, preferred to be smooth, changing from a shallow angle closer "to the light source to a steeper angle further away from the light source.
Preferably, the light diffusing portion includes a plurality of generally triangular or trianguloid diffusion surfaces. Preferably, the illumination ring is formed of polycarbonate, acrylic or the like.
1 Advantageously, the illumination ring having the graduated angular profile of the light diffusing portion provides a more even brightness (relative to prior art illumination rings) at the outer surface thereof by directing more light towards the outer surface at portions of :..the light diffusing portion which are more remote from the lights source. This feature is associated with correspondingly reduced delta brightness levels.
Preferably, the light ring is used in combination with a single light source. Preferably, that light source is an LED. Preferably, the LED is a directional LED with a beam width of about 15 degrees.
Further features and advantages of the present invention will be apparent from the following detailed description, which is made by way of example only, of the preferred embodiment of the invention in conjunction with the accompanying drawings. The drawings are described briefly as follows:
I..
P:\OPERSSB\bwhpco.p~d.c30/04/01 -4- Figure 1 shows an illumination ring in perspective view in accordance with an embodiment of the invention; Figure 2 is a similar perspective view to that of Figure 1, but with particular reference to the changing angular orientation of a circular diffusion portion of the illumination ring; Figure 3 is a blow up of a portion of Figure 1, showing the circular diffusion portion in greater detail; Figure 4 is a blow up of a portion of Figure 1, showing in greater detail the area of the illumination ring in which a light source is housed; Figure 5 is a perspective view of the other side of the illumination ring shown in Figure 1, in an orientation which is consistent with normal use of the illumination ring; Figure 6 is a diagram of a light channel of the illumination ring in cross section, illustrating S: the angular orientation and width of the circular diffusion portion; e o ooeo Figure 7 is a perspective view of an alternative LED mounting orientation relative to the illumination ring.
Shown in Figure 1 is an illumination ring 2 having a circular diffusion portion 4 in an inner area thereof for receiving light from a light source 5. The circular diffusion portion 4 includes a graduated portion 4a and a flat portion 4b for receiving the light and directing it towards an exposed outer surface 10 of the illumination ring 2. Graduated portion 4a changes in width and angle relative to its distance from light source 5. This relationship is described in further detail below in relation to Figures 2 and 6. Flat portion 4b, like graduated portion 4a, has generally triangularly shaped light diffusing surfaces disposed in a radial orientation towards a centre well 9 of the illumination ring 2. These light diffusing surfaces may alternatively be characterised as corrugated or serrated and may be of any P:\OPER\SSB'b.shp..oPdoc.-30d4/01 other appropriately formed irregularities along the circular diffusion portion for facilitating refraction of the light toward exposed outer surface The illumination ring 2 is intended to receive a locking shaft (not'shown) through the centre well 9 in a clearance fit with inner wall 8 and having a clearance margin of about The illumination ring 2 is made of a transparent polycarbonate, acrylic or other suitable similar material for use as a light-transmissive illumination ring.
Light from light source 5, which is shown in Figure 1 as an LED, is emitted directionally, a S portion of which is directly emitted to circular diffusion portion 4. The remaining light emitted from light source 5 will either be refracted into light channel 11 indirectly or will be lost in an unusable manner. Light channel 11 is connected to the remainder of illumination ring 2 at several points along outer wall 7 and in the vicinity of light source Generally circumferential gaps 23 between the light channel 11 and the remainder of the illumination ring 2 effectively define an inner ring portion (which is effectively the same as light channel 11) and an outer ring portion 21 on either side of those gaps 23. The *purpose of light channel 11 is to trap light refracted into circular diffusion portion 4 or other portions of the light channel 11 for facilitating diffusion of the light towards and out of exposed outer surface 10. To assist in directing the light from light source 5 into light channel 11, an inner proximal diffusion portion 16 is provided proximal to the light source and adjacent a triangular prism 17. The triangular prism 17 also assists in directing light into the light channel 11. An outer proximal diffusion portion 18 is provided at the back of the illumination ring 2 (shown in Figure 5) for additionally facilitating refraction-of light towards light channel 11 through triangular prism 17. Back wall 12 and side walls 13 are provided around the back and sides of the light source 5 to assist in directing light by reflection towards the light channel 11.
The inner and outer proximal diffusion portions 16, 18 are formed with ridges so as to aid in refraction. The ridges formed as shown in Figures 1 and 5 show sharply angled ridges P:%OPER\SSB\bowhsppsmp.dm-30A)4/401 -6and troughs as a preferred embodiment. However, other suitable patterned or irregular surfaces may be used as appropriate for facilitating refraction and diffusion of light towards light channel 11.
A further means of directing light toward the exposed outer surface 10 of light channel 11 is provided by a window 6. The window 6 assists in maintaining internal reflection into the light channel 11 and is located within the light channel 11 adjacent the proximal diffusion portion 16 on one side and circular diffusion portion 4 on the other. Light travelling from triangular prism 17 towards light channel 11 may be refracted along the 10 outside of light channel 11 towards the distal area thereof. In the context of this specification, proximal is defined as being proximal with respect to the light source and distal accordingly denotes areas remote from the light source.
OoA primary feature of the illumination ring 2 is the different angular orientations of the 15 graduated portion 4a around the whole of the circular diffusion portion 4. This is complimented by reduced width of the graduated portion 4a around the distal end of light channel 11. It is this change in angular orientation and change in width around the circular .°::"diffusion portion 4 which assists in providing a more even distribution of light refracted towards exposed outer surface 10 and which therefore provides a more even glow of light around the illumination ring as perceived by the driver of the automobile. Shown in Table 1 below with reference to Figures 2 and 6 are the preferred angles and widths of the graduated portion 4a.
Table 1 POSITION A B C D E F G Triangular diffusing 450 160 120 100 120 160 450 Surface Angle (X) Triangular diffusing 1.3mm 1.7mm 2mm 2mm 2mm 1.7mm 1.3mm Surface Length (Y) The angle and length values between positions G and A shown in Figure 2 in the clockwise direction are constant. The values shown in the table are for a preferred profile of the P:NOPERkssB~bowhspemppdwoc33014/01 -7graduated portion 4a, but these values may be modified up or down somewhat to suit a particular application. The angle of graduated portion 4a is determined with respect to the generally horizontal plane in which an annular surface 15 (shown in Figure 6) of the light channel 11 Ilies. In portions of the circular diffusion portion 4 where flat portion 4b rings the outside of graduated portion 4a, the width of graduated portion 4a, designated by reference sign Y in Figure 6, does not include any width of the flat portion 4b. The angle of graduated portion 4a is represented in Figure 6 by reference sign X.
The preferred light source 5 for embodiments of the invention is a directional LED, with a 10 beam width of approximately 15 degrees. An example of such an LED is made by Osram, model no. LT5413VBW. Such an LED may, in alternative embodiments, be used with one or more other light sources. The other light sources may be LEDs or globe lights or other such suitable light sources.
S 15 Illustrated in Figure 7 is an arrangement of the illumination ring (represented by the reference numeral with a light source 5' having a different orientation to that of the embodiment in Figure 1, for example. The light source 5' in Figure 7 is directed along the plane of orientation of the illumination ring (i.e the horizontal plane of annular surface "0-..rather than transverse to that plane as shown in Figure 1. For simplicity of illustration, not all parts of the illumination ring 2' are shown in Figure 7. Any or all of the features of the illumination ring shown in Figure 1, such as the gaps 23, inner and outer proximal diffusion portions 16 and 18, window 6 and back and side walls 12 and 13, may be incorporated into the illumination ring 2'.
In further alternative embodiments, the angular orientation of the light source relative to the plane of orientation of the illumination ring may be such that it is acutely angled. In such embodiments, the inner and outer proximal diffusion portions 16, 18 and other refraction-assisting and reflecting structures of the illumination ring are modified accordingly to functionally direct light toward the light channel 11.
The angles and widths of the graduated portion 4a and flat portion 4b of the circular P:%OPERMSBboshsp=nPd%-30/G4mI1 -8diffusion portion of illumination ring 2' are the same as shown in Figure 2 and described above with reference to Table 1.
Claims (8)
1. An illumination ring having an outer surface (10) and a light diffusing portion characterised in that the light diffusing portion has a graduated angular profile (4a) for facilitating communication of light from a light source towards the outer surface
2. An illumination ring having an outer surface (10) for transmitting light therethrough from a light source located, in use of the illumination ring adjacent the illumination ring and having a light diffusing portion for facilitating communication of light from the light source to the outer surface characterised in that an angle of the light diffusing portion relative to the outer surface (10) depends on the distance of a relevant portion (4a) of the light diffusing portion from the light source 4
3. The illumination ring of claim 1 or 2, characterised in that the light diffusing portion includes a plurality of generally trianguloid diffusion surfaces.
4. The illumination ring of claim 1 or 2, characterised in that the illumination ring is formed of transparent polycarbonate, acrylic or the like. 4 The illumination ring of claim 1 or 2, characterised in that the illumination ring is used in combination with a single LED light source
6. The illumination ring of claim 5, characterised in that the LED is a directional LED with a beam width of about 15 degrees.
7. The illumination ring of any one of the preceding claims, characterised in that a directional orientation of the light source is substantially transverse to a planar orientation of the outer surface P:OPER\SSB\boschspecompdo-30/04/0
8. The illumination ring of any one of claims 1 to 6, characterised in that a directional orientation of the light source is substantially parallel to a planar orientation of the outer surface
9. The illumination ring of any one of the preceding claims, characterised in that an inner ring portion (11) of the illumination ring is at least partially separated from an outer ring portion (21) by one or more gaps (23) therebetween. DATED this 3 0 th day of April 2001 Robert Bosch GmbH By its Patent Attorneys DAVIES COLLISON CAVE
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU38992/01A AU784343B2 (en) | 2001-03-09 | 2001-04-30 | Illumination ring |
DE10208045A DE10208045A1 (en) | 2001-03-09 | 2002-02-22 | lighting ring |
JP2002063996A JP2002274256A (en) | 2001-03-09 | 2002-03-08 | Lighting ring |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPR3667 | 2001-03-09 | ||
AUPR3667A AUPR366701A0 (en) | 2001-03-09 | 2001-03-09 | Illumination ring |
AU38992/01A AU784343B2 (en) | 2001-03-09 | 2001-04-30 | Illumination ring |
Publications (2)
Publication Number | Publication Date |
---|---|
AU3899201A true AU3899201A (en) | 2002-09-12 |
AU784343B2 AU784343B2 (en) | 2006-03-16 |
Family
ID=25624580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU38992/01A Expired AU784343B2 (en) | 2001-03-09 | 2001-04-30 | Illumination ring |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP2002274256A (en) |
AU (1) | AU784343B2 (en) |
DE (1) | DE10208045A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102576116A (en) * | 2009-07-17 | 2012-07-11 | Psa标致·雪铁龙汽车公司 | Light guide, illumination device comprising such a light guide and interior fitting part for a vehicle comprising such an illumination device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2148797B1 (en) * | 2007-04-27 | 2013-03-20 | Tyco Electronics Canada ULC | Lighting assembly |
DE102008021290B4 (en) * | 2008-04-29 | 2012-12-06 | Automotive Lighting Reutlingen Gmbh | Light guide structure for a motor vehicle lighting device and motor vehicle lighting device with such a light guide structure |
EP2161599A1 (en) | 2008-09-04 | 2010-03-10 | Robert Bosch Gmbh | Cylindrical light guide and illuminating device |
DE102008042472B4 (en) * | 2008-09-30 | 2021-04-22 | BSH Hausgeräte GmbH | Light ring |
WO2016008585A1 (en) | 2014-07-15 | 2016-01-21 | Trw Automotive Gmbh | Seat belt buckle |
DE102015011904A1 (en) * | 2015-09-11 | 2017-03-16 | MENTOR GmbH & Co. Präzisons-Bauteile KG | Lighting device with a planar light guide plate |
CN109606251B (en) * | 2018-12-26 | 2021-10-01 | 江苏铁锚玻璃股份有限公司 | Automobile skylight optical structure with lighting and color atmosphere lighting effects |
BE1030603B1 (en) * | 2022-06-10 | 2024-01-15 | Miele & Cie | Vacuum cleaner |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19954794A1 (en) * | 1999-11-13 | 2001-05-17 | Bosch Gmbh Robert | Lighting unit |
DE10211768A1 (en) * | 2000-12-22 | 2003-10-02 | Friedrich Burckhardt | Ring light for use on camera objective, especially for digital camera, has carrier arrangement with at least one annular board with notches open to edge and attached to relatively movable housing parts at edges |
DE10119010C2 (en) * | 2001-04-18 | 2003-05-28 | Visteon Global Tech Inc | Lighting arrangement for the ignition lock of a motor vehicle |
-
2001
- 2001-04-30 AU AU38992/01A patent/AU784343B2/en not_active Expired
-
2002
- 2002-02-22 DE DE10208045A patent/DE10208045A1/en not_active Withdrawn
- 2002-03-08 JP JP2002063996A patent/JP2002274256A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102576116A (en) * | 2009-07-17 | 2012-07-11 | Psa标致·雪铁龙汽车公司 | Light guide, illumination device comprising such a light guide and interior fitting part for a vehicle comprising such an illumination device |
CN102576116B (en) * | 2009-07-17 | 2014-08-13 | Psa标致·雪铁龙汽车公司 | Light guide, illumination device comprising such a light guide and interior fitting part for a vehicle comprising such an illumination device |
Also Published As
Publication number | Publication date |
---|---|
DE10208045A1 (en) | 2003-04-24 |
JP2002274256A (en) | 2002-09-25 |
AU784343B2 (en) | 2006-03-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |