EP3347644A1 - Beleuchtungsvorrichtung mit einer ebenen lichtleiterplatte - Google Patents
Beleuchtungsvorrichtung mit einer ebenen lichtleiterplatteInfo
- Publication number
- EP3347644A1 EP3347644A1 EP16762974.0A EP16762974A EP3347644A1 EP 3347644 A1 EP3347644 A1 EP 3347644A1 EP 16762974 A EP16762974 A EP 16762974A EP 3347644 A1 EP3347644 A1 EP 3347644A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- guide plate
- light guide
- lighting device
- limiting structure
- 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.)
- Ceased
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
- 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
- G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like
-
- 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
Definitions
- the invention relates to a lighting device with a planar light guide plate according to the preamble of claim 1.
- US 2004/0066659 A1 discloses a lighting device with an annular circumferential light channel, wherein the light channel has a junction region for a light irradiation on both sides.
- the lighting ring is formed by a light channel into which the light emitted by a light source is irradiated.
- EP 306 659 B1 discloses an illuminated display unit, in particular a house number, traffic sign or advertising medium, which has a light guide plate into which at least one electrical lighting element, preferably a light-emitting diode, is embedded on at least one lateral boundary edge.
- the light guide plate carries the display symbols and has boundary edges, which with a reflective layer are provided.
- the light guide plate contains fluorescent particles.
- the display symbols can be formed in this light guide plate, in particular milled. At the resulting skewed edges, the light can escape, causing the corresponding display symbols to emerge bright.
- the disadvantage is that no commercially available light guide plates can be used to ensure a uniform even illumination of certain display surfaces.
- a luminaire is known, are used in the LEDs in a lens to extinguish the contours of the light source and / or to emit the light in a larger angular range.
- the light output is very low.
- a lighting unit which comprises a light guide element with an elongated curved luminous surface and at least one light source for illuminating the light guide.
- Such lighting units are used, for example, to generate a corona around a push button as search lighting.
- the light guide element is formed there annularly and forms with a Lichteinkopplungsstelle a cyclone-like structure.
- the surface of a helically rising underside of the light guide element has, for example, a radially extending corrugation, which leads to the light coupled in by the light source being partially reflected to an overlying concentrically arranged annular light surface, while the light passes through the light guide ring.
- the disadvantage is that the production is complicated and expensive.
- the invention is therefore an object of the invention to provide a lighting device that ensures a contour or outline lighting a display or actuator with good light output with uniform illumination.
- a lighting device which allows with little effort a contour or outline lighting of test sockets, buttons, switches, lock cylinders, advertising media, etc.
- Such contour or outline lighting which is also referred to as search lighting or corona lighting, can provide a homogeneous illumination by means of only one LED.
- the structure with a light guide plate is very flat and can be easily mounted on front panels of electrical equipment. The structure is also easy to adapt to different diameters or shapes of components to be flipped.
- light guide plates with sufficient dimensions are to be used, in each of which a receptacle for the component to be flipped is to be introduced.
- An optical waveguide platform section provided on the optical waveguide plate forms a light coupling path which expands and scatters the coupled-in light by means of at least one internal optical defect in such a way that a light curtain is formed which can illuminate the component which can be inserted into the receptacle.
- the light curtain is designed to overhang to form a circumferential luminous surface on the recording can.
- the light coupling path with an internal optical defect does not diminish the luminous efficacy, as is often the case with lenses or diffusers integrated in the light guide.
- the at least one internal optical defect virtually forms an inner target for the coupled-in light beam, which breaks it down, so that in conjunction with the reflective boundary side surfaces and the delimiting structure adjacent to a receptacle a homogeneous boundary image of a delimiting contour of the following structure arises.
- the shape and width of the boundary contour then determines the illumination of the illumination.
- the uniform illumination results for the different light colors in the same way due to the built-in inner optical defect.
- the inner optical defect is preferably locally limited in Area of a light incidence path of a preferably formed as a point light source luminous element.
- FIG. 1 shows schematically a perspective view of a lighting device
- FIG. 2 schematically shows a plan view of the illumination device according to FIG. 1.
- the invention relates to a lighting device 1 with a planar light guide plate 2.
- the light guide plate 2 is at least one light emitting element, which is preferably designed as a light emitting diode 3, light on at least one side surface 4 of the light guide plate. 2 couples.
- the light guide plate 2 which is preferably flat here, for example, with a thickness in the range of 3 to 8 mm, has edge side boundary side surfaces 5, 6, which are provided with a reflective layer (not shown).
- the reflective layer ensures that the coupled-in light at the outer edge of the light guide plate 2 is not decoupled.
- the light guide plate 2 defines a receptacle 7, which is for example a recess.
- the receptacle 7 serves for introducing a display or actuating element or other object that is to be ummonyt.
- a limiting structure 8 adjacent the receptacle 7 is provided on the light guide plate 2, at which the light coupled into the light guide plate 2 is coupled out.
- the provided for a light exit limiting structure 8 adjacent to the integratable into the light guide plate 2 display or actuator has a limiting contour that can follow the contour of the display or actuator to be flipped. This through the boundary structure. 8 decoupled light thus forms a luminous surface, the elongated and curved running to produce a corona, for example, a push button, can serve.
- a push button any type of display or actuation elements such as a switch, a test socket, a lock cylinder, a handle, an advertising symbol, etc. can be illuminated.
- a corona illumination which simulates the contour of a display or actuating element and surrounds it on the basis of the receptacle 7, the finding or the display is improved in the dark.
- the light guide plate 2 has a light coupling piece 9 adjacent to the side surface 4 coupling in to the light.
- the Lichteinkopplungs choir 9 has at least one inner optical defect 10, which expands the coupled light and scatters to form an overhanging the limiting structure 8 light curtain, which can be coupled out of the light guide plate 2.
- the limiting structure 8 is designed here as a boundary contour circumferentially for receiving 7 for the display or actuator. Furthermore, a rear boundary side surface 11 facing away from the light coupling piece 9 follows the limiting contour of the limiting structure 8 in a shape-adapted manner.
- the light guide plate 2 then has along the boundary side surface the shape of a Kreisschringes when the receptacle 7 is formed round. Even with larger radii, the optical waveguide section can be illuminated concentrically to the rear boundary side surface 11 with only one light source, in this case the light-emitting diode 3, homogeneously.
- the inner optical defect 10 is preferably a mechanically introduced, locally limited defect 10, here for example a simple hole, onto which the light beam of a preferably designed as a point light source luminous element, here the light emitting diode 3, is directed.
- the at least one light emitting diode 3 is preferably an RGB LED mounted on an integrated circuit board 12.
- light can be coupled in and out of several wavelengths, in particular light of three different wavelengths and / or light of the colors red, green and blue.
- the light guide plate 2 is preferably formed of a plastic such as PMMA or polycarbonate.
- the light guide plate 2 is preferably made of a plastic having a refractive index at the wavelength 589 nm (yellow-orange) in the range of 1, 2 to 1, 8, in particular 1, 5 to 1, 6 formed.
- the transmission is preferably more than 70%, in particular 90% to 95%.
- the limiting structure 8 for coupling out light may be provided as a band structure having bevelled edges and / or roughened and / or printed on.
- the delimiting structure 8 can also be coverable on the head side with a diffuser plate (not shown).
- the light guide plate 2 is finally preferably arranged in a housing 13, the connecting lines 14 for the at least one luminous element, here the light-emitting diode 3, contributes to the formation of a preassembled built-in component. It is preferred to provide only one light-emitting diode 3, but alternatively, a plurality of light-emitting diodes 3 and, if appropriate, a plurality of associated impurities 10 may be provided in a light guide plate 2 with in particular larger dimensions.
- the lighting device 1 can also be assembled as a lighting module with other such lighting modules.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015011904.4A DE102015011904A1 (de) | 2015-09-11 | 2015-09-11 | Beleuchtungsvorrichtung mit einer ebenen Lichtleiterplatte |
PCT/EP2016/001519 WO2017041894A1 (de) | 2015-09-11 | 2016-09-08 | Beleuchtungsvorrichtung mit einer ebenen lichtleiterplatte |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3347644A1 true EP3347644A1 (de) | 2018-07-18 |
Family
ID=56889036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16762974.0A Ceased EP3347644A1 (de) | 2015-09-11 | 2016-09-08 | Beleuchtungsvorrichtung mit einer ebenen lichtleiterplatte |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3347644A1 (de) |
DE (1) | DE102015011904A1 (de) |
WO (1) | WO2017041894A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202018003092U1 (de) * | 2018-06-30 | 2019-10-01 | WAGO Verwaltungsgesellschaft mit beschränkter Haftung | Elektronisches Gerät mit Lichtleiter |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3322393A1 (de) | 1983-06-22 | 1985-01-10 | Data Faktor Ind Products Gmbh | Leuchte, insbesondere hauseingangs- oder schummerleuchte |
DE3730591C1 (de) | 1987-09-11 | 1988-07-07 | Inotec Gmbh Ges Fuer Innovativ | Beleuchtete Anzeigeeinheit,insbesondere Hausnummer,Verkehrsschild,Werbetraeger |
JP4279952B2 (ja) * | 1999-08-20 | 2009-06-17 | シチズン電子株式会社 | 面状光源ユニット |
DE19954794A1 (de) | 1999-11-13 | 2001-05-17 | Bosch Gmbh Robert | Beleuchtungseinheit |
AU784343B2 (en) * | 2001-03-09 | 2006-03-16 | Robert Bosch Gmbh | Illumination ring |
DE10119010C2 (de) * | 2001-04-18 | 2003-05-28 | Visteon Global Tech Inc | Beleuchtungsanordnung für das Zündschloss eines Kraftfahrzeugs |
DE10153543A1 (de) * | 2001-10-30 | 2003-05-15 | Hella Kg Hueck & Co | Beleuchtungseinrichtung für Fahrzeuge |
US6910783B2 (en) * | 2002-10-04 | 2005-06-28 | Lumitex, Inc. | Transparent light emitting members and method of manufacture |
JP4057389B2 (ja) * | 2002-10-10 | 2008-03-05 | アルプス電気株式会社 | 導光材および照明装置 |
US20080007964A1 (en) * | 2006-07-05 | 2008-01-10 | Tai-Yen Lin | Light guiding structure |
TWI454639B (zh) * | 2009-12-28 | 2014-10-01 | Hon Hai Prec Ind Co Ltd | 環形導光結構及採用該環形導光結構之背光模組 |
JP6257132B2 (ja) * | 2012-10-15 | 2018-01-10 | 小島プレス工業株式会社 | 導光体装置 |
TWI563203B (en) * | 2013-09-18 | 2016-12-21 | Nifco Inc | Illumination device |
-
2015
- 2015-09-11 DE DE102015011904.4A patent/DE102015011904A1/de active Pending
-
2016
- 2016-09-08 WO PCT/EP2016/001519 patent/WO2017041894A1/de active Application Filing
- 2016-09-08 EP EP16762974.0A patent/EP3347644A1/de not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
DE102015011904A1 (de) | 2017-03-16 |
WO2017041894A1 (de) | 2017-03-16 |
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