EP1525574A1 - Display device comprising a luminous element with a radiation characteristic, the solid angle of which is controllable - Google Patents
Display device comprising a luminous element with a radiation characteristic, the solid angle of which is controllableInfo
- Publication number
- EP1525574A1 EP1525574A1 EP03787605A EP03787605A EP1525574A1 EP 1525574 A1 EP1525574 A1 EP 1525574A1 EP 03787605 A EP03787605 A EP 03787605A EP 03787605 A EP03787605 A EP 03787605A EP 1525574 A1 EP1525574 A1 EP 1525574A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- display device
- light guide
- lighting element
- solid angle
- 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- Withdrawn
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 8
- 239000007787 solid Substances 0.000 title claims abstract description 6
- 230000008878 coupling Effects 0.000 claims abstract description 5
- 238000010168 coupling process Methods 0.000 claims abstract description 5
- 238000005859 coupling reaction Methods 0.000 claims abstract description 5
- 239000002159 nanocrystal Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 2
- 239000011347 resin Substances 0.000 claims 1
- 229920005989 resin Polymers 0.000 claims 1
- 230000032258 transport Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
- G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
-
- 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
- B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
- B60Q3/14—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards lighting through the surface to be illuminated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
- G01D13/22—Pointers, e.g. settable pointer
- G01D13/26—Pointers, e.g. settable pointer adapted to perform a further operation, e.g. making electrical contact
- G01D13/265—Pointers which conduct light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/20—Optical features of instruments
- B60K2360/33—Illumination features
- B60K2360/331—Electroluminescent elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/60—Structural details of dashboards or instruments
- B60K2360/68—Features of instruments
- B60K2360/698—Pointers of combined instruments
- B60K2360/6992—Light conducting pointers
Definitions
- the invention relates to a display device with a
- Luminous element and a light guide having coupling and decoupling points, a light signal emitted by the lighting element being transportable through the light guide.
- signals are displayed on a projection surface by means of a differentiating optical signal generator via a light-conducting element. So far, such displays have had a large number of individual light-emitting elements or an electronic display
- the invention has for its object to propose a display unit which has a simpler and less expensive structure.
- this object is achieved by a display device of the type mentioned at the outset, in which the lighting element has a radiation characteristic 35 which can be controlled in solid angle.
- the display unit thus has a spatially differentiating light source that can be controlled by a control or regulating unit. Different display areas can thus be supplied with a light signal from a single lighting element.
- the display areas are the decoupling points of the light guide.
- projection surfaces are provided onto which light emerging from the light guide falls.
- the projection surfaces are connected directly to the light guide. But they can also be implemented as separate components. The same applies to the light entry surfaces of the light guide, which are adapted to the optical-geometric conditions of the light guide and are positioned corresponding to the light source.
- the light guide has light channels which direct the coupled light onto the corresponding display or projection surfaces.
- Possible problems caused by signals that generate optical crosstalk are achieved in the simplest case by optically separating the light channels, e.g. by introducing a non-transmissive layer.
- additional optical channels made of glass or glass fibers are also conceivable in the light guide. They enable the light to be guided to the projection surface without interference.
- the lighting element is designed in such a way that it can change its spatial radiation characteristic as a function of a control signal.
- a mechanically less complex design in the sense of this invention is provided by the use of a light-emitting diode, which can spatially change its radiation characteristic.
- a light-emitting diode which can spatially change its radiation characteristic.
- an RC-LED Resonance Cavity-LED
- "Bragg" mirrors in a light-emitting diode chip ensure that the spatial luminous intensity distribution curve, the so-called Rousseau diagram, becomes large or small at different temperatures of the chip.
- Thin-film LEDs are particularly advantageous.
- the temperature of the chip is not only controlled via the LED current, but also via an additional heating and / or cooling element which is arranged as close as possible to a heat sink (heatsink) of the LED chip.
- a control unit takes care of the acquisition and processing of the current parameters, if necessary with the help of arithmetically stored current and temperature comparison tables, for the corresponding alignment of the light distribution curve.
- Illuminating elements with a sufficiently short wavelength make it possible to give the light signal different colors with the aid of projection surfaces equipped with wavelength transmitters.
- UV light is usually referred to as light with a wavelength of 400-800 nm.
- Phosphorus and other so-called phosphors are used as frequency converters, whose activator centers emit the energy emitted by the luminous element in the desired color. It is also conceivable to use so-called silicon nanocrystals, which after irradiation with UV light emit differently defined wavelengths.
- FIG. 1 shows a first embodiment of a display device according to the invention with a rigid light guide
- FIG. 2 shows a second embodiment of a display device according to the invention with a movable light guide
- Figure 3 shows a light direction controllable LED light element in a schematic representation
- Figure 4 is a schematic representation of the arrangement of a lighting element with a control unit.
- FIG. 1 shows a first embodiment of a display device according to the invention.
- a lighting element 12 is provided which, depending on the control, can generate a spatially different distribution of light cones, that is to say a different radiation characteristic.
- two light cones 4 are shown by way of example, which of course are not generated simultaneously, but are only shown together in FIG. 1 for reasons of clarity.
- a first light cone, shown in dots, is narrow and strikes a light entry area 2 of a light guide 14 such that only a part of the light entry area 2 is irradiated by the light cone 4.
- Two light channels 5 are formed in the light guide 14 and are optically separated from one another, for example by a reflective layer.
- light channels can also be formed in that the light guide 14 consists of several bundled glass fibers. Suitable glass fibers for UV light can consist of quartz glass or a quartz glass-like material. In the case of the narrow cone of light shown, the light only hits the lower light channel, so that a light signal can only be seen in a light exit area 1 of the light guide 14 even in the area of the lower light channel. The upper light channel, which receives no light signal from the lighting element 12, remains unilluminated.
- the other light cone 4 shown is significantly larger and detects both light channels 5 of the light entry area 2, so that a signal can also be seen on the side of the light exit area 1 in the area of both light channels 5.
- FIG. 1 also shows a light shaping element 11 that is arranged between the lighting element 12 and the light guide 14.
- This light shaping element 11 serves to influence the shape of the light cone 14 and to help ensure that the light enters the light guide 14 in an optimal manner.
- the light guide 14 is immovable relative to the lighting element 12, in the display device shown in FIG. 2 the light guide 14 is arranged movably.
- a luminous element 12 emits light, which is directed by a light shaping element 11 onto the light entry region 2 of a light guide 14.
- a plurality of light deflecting elements 9 are provided within the light guide 14, which deflect light signals transported through the light guide 14 in a defined manner. In the beam path, a light signal is reflected by a first light deflecting element into a horizontal area of the light guide 14. There, two further light deflection elements 9 are provided, which serve to transmit light signals upwards. flex so that they leave the light guide 14 from the light exit areas 10.
- the light guide 14 itself can be divided into a plurality of light channels, so that light which is radiated into the light guide 14 in a specific part of the light entry region 2 is guided within a specific light channel.
- the light deflecting elements 9, which reflect light signals in the direction of the light exit areas 10, are specifically designed for individual light channels, so that there is a fixed association between a specific light exit area 10 and an area of the light entry area 2.
- the light guide 14 is a homogeneous light guide, which is therefore not divided into individual channels. Even with such a light guide 14, light can be radiated from the lighting element 12 in such a way that it emerges again at a specific point on the light guide 14. This is possible because the light generally does not pass through the light guide 14 in a straight line, but is reflected several times at the boundary layers to the surroundings of the light guide. The angle of incidence and the knowledge of the geometric shape of the light guide 14 can thus be used to determine at which point a light signal radiated in at a certain angle emerges again.
- the light deflection elements 9, which reflect light signals in the direction of the light exit areas 10, can in turn be arranged in such a way that only light signals irradiated at a certain angle emerge at a certain light exit area 10.
- a cover unit 8 is provided above the light guide 14. This has sections which are designed as absorption elements 7 and areas which are designed as display elements 6.
- the display elements 6 are provided for passing through the light exit areas 10 of the light guide to make visible 14 emerging light signals. For this purpose, they are either designed as transmission elements, that is to say they let the light rays pass unhindered, or else they are designed as projection elements. In the latter case, for example, the surface is roughened so that the light is scattered.
- the projection or transmission elements can be colored to give the visible light a certain color.
- the absorption elements 7 ensure that crosstalk between different transmission or projection elements is prevented.
- an additional movement unit 13 is also provided, by means of which the light guide 14 can be moved or rotated. This makes it possible to control a large number of display elements 6 with a single light guide 14.
- the lighting element 12 has a light-generating semiconductor chip 15 which is embedded in the reflector housing 17.
- the semiconductor chip 15 has a cold supply and heat removal surface 16 which is connected to a heating element and / or cooling element 20. This makes it possible to keep the chip 15 at the desired operating temperature.
- the lighting element 12 has connections 18 for the semiconductor chip 15 and connections 19 for the heating element 20. By means of the heating or cooling element 20, it is possible to set the temperature of the lighting element precisely in order to set the reflection or refraction properties of the Bragg mirror via the temperature and thus to obtain the desired radiation pattern.
- FIG. 4 shows schematically how a control of a lighting element 12 can be designed.
- the lighting element 12 is powered by a supply device 24 provided .
- a control device 21 controls or regulates the luminous element current adapted to a display interior temperature. This has an interface in order to be controlled by a vehicle bus system 23.
- a vehicle bus system 23 As a rule, an on-board computer is connected to the vehicle bus system, which can also be used to provide information, for example, about temperature-current value tables.
- Known bus systems are, for example, the CAN bus or the networks for vehicles known as K-Line and MOST.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Theoretical Computer Science (AREA)
- Transportation (AREA)
- Computer Hardware Design (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Couplings Of Light Guides (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10234124A DE10234124B4 (en) | 2002-07-26 | 2002-07-26 | display device |
DE10234124 | 2002-07-26 | ||
PCT/DE2003/002064 WO2004017290A1 (en) | 2002-07-26 | 2003-06-20 | Display device comprising a luminous element with a radiation characteristic, the solid angle of which is controllable |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1525574A1 true EP1525574A1 (en) | 2005-04-27 |
Family
ID=30128430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03787605A Withdrawn EP1525574A1 (en) | 2002-07-26 | 2003-06-20 | Display device comprising a luminous element with a radiation characteristic, the solid angle of which is controllable |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1525574A1 (en) |
JP (1) | JP4012544B2 (en) |
DE (1) | DE10234124B4 (en) |
WO (1) | WO2004017290A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010003273B4 (en) | 2010-03-25 | 2022-04-21 | Bayerische Motoren Werke Aktiengesellschaft | automotive interior lighting |
DE102021114235A1 (en) | 2021-06-01 | 2022-12-01 | Vega Grieshaber Kg | Status display with means for guiding light and sensor with a status display |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3533056A1 (en) * | 1985-09-17 | 1987-03-26 | Swf Auto Electric Gmbh | Multi-position illuminated switch on motor vehicles |
US5174649B1 (en) * | 1991-07-17 | 1998-04-14 | Precision Solar Controls Inc | Led lamp including refractive lens element |
US5226053A (en) * | 1991-12-27 | 1993-07-06 | At&T Bell Laboratories | Light emitting diode |
JP3707060B2 (en) * | 1994-06-29 | 2005-10-19 | 株式会社ニコン | Illumination optics |
US5613750A (en) * | 1994-11-07 | 1997-03-25 | Delco Electronics Corporation | Fluorescent backlighting device for an instrument panel |
US5647658A (en) * | 1995-05-11 | 1997-07-15 | Ziadi; Bouchaib | Fiber-optic lighting system |
US5986792A (en) * | 1998-02-03 | 1999-11-16 | Farlight Corporation | Lighting system sequencer and method |
DE10021100A1 (en) * | 2000-05-02 | 2001-11-15 | Bosch Gmbh Robert | Lighting device and method for lighting |
-
2002
- 2002-07-26 DE DE10234124A patent/DE10234124B4/en not_active Expired - Fee Related
-
2003
- 2003-06-20 JP JP2004528324A patent/JP4012544B2/en not_active Expired - Fee Related
- 2003-06-20 WO PCT/DE2003/002064 patent/WO2004017290A1/en active Application Filing
- 2003-06-20 EP EP03787605A patent/EP1525574A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2004017290A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2005534079A (en) | 2005-11-10 |
DE10234124A1 (en) | 2004-02-12 |
WO2004017290A1 (en) | 2004-02-26 |
JP4012544B2 (en) | 2007-11-21 |
DE10234124B4 (en) | 2004-09-09 |
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Legal Events
Date | Code | Title | Description |
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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 |
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17P | Request for examination filed |
Effective date: 20041223 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
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RBV | Designated contracting states (corrected) |
Designated state(s): CH DE FR GB IT LI SE |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: FORD, GARY Inventor name: WOLF, JUERGEN |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTINENTAL AUTOMOTIVE GMBH |
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17Q | First examination report despatched |
Effective date: 20090402 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20090813 |