New! View global litigation for patent families

WO2007071722A1 - Illumination correction device - Google Patents

Illumination correction device

Info

Publication number
WO2007071722A1
WO2007071722A1 PCT/EP2006/069999 EP2006069999W WO2007071722A1 WO 2007071722 A1 WO2007071722 A1 WO 2007071722A1 EP 2006069999 W EP2006069999 W EP 2006069999W WO 2007071722 A1 WO2007071722 A1 WO 2007071722A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
light
device
according
glass
space
Prior art date
Application number
PCT/EP2006/069999
Other languages
French (fr)
Inventor
Hugues Lefevre
Original Assignee
Agc Flat Glass Europe Sa
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

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF
    • F21S10/00Lighting devices or systems producing a varying lighting effect
    • F21S10/02Lighting devices or systems producing a varying lighting effect changing colors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials
    • H05B33/0842Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control
    • H05B33/0857Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the color point of the light
    • H05B33/0866Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the color point of the light involving load characteristic sensing means
    • H05B33/0869Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the color point of the light involving load characteristic sensing means optical sensing means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials
    • H05B33/0842Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control
    • H05B33/0857Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the color point of the light
    • H05B33/0872Circuit arrangements not adapted to a particular application for light emitting diodes (LEDs) comprising only inorganic semi-conductor materials with control of the color point of the light involving load external environment sensing means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B37/00Circuit arrangements for electric light sources in general
    • H05B37/02Controlling
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B39/00Circuit arrangements or apparatus for operating incandescent light sources and not adapted to a particular application
    • H05B39/04Controlling
    • H05B39/041Controlling the light-intensity of the source
    • H05B39/042Controlling the light-intensity of the source by measuring the incident light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Uses or applications of lighting devices or systems not provided for in codes F21W2101/00 - F21W2121/00
    • F21W2131/10Outdoor lighting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

A device for automatically correcting the illumination of an enclosed or semi-enclosed space containing a light source, LEDs and at least one transparent glass sheet in which means for correcting the light emitted by the light source are controlled by the amount and/or quality of light illuminating the space. The device is suitable for lighting panels, motor vehicle roofs, greenhouse roof glazing and illuminated mirrors.

Description

A lighting correction

The present invention relates to a device for correcting the light which occurs automatically when the intensity and the quality of the illumination varies over time.

We know the problem of automatic switching of lighting when the headlights are daylight decrease or disappear. This problem is solved through the use of an electronic control module with a sensor continuously measuring the intensity of ambient light and acting on the ignition of a lamp when the level of intensity that is to pass under a certain predetermined threshold.

It is however not known system performing an automatic correction of the intensity and / or color temperature of the lighting according to the variation of the intensity and / or quality of the ambient light.

The present invention aims to remedy this deficiency by providing a device as defined in claim 1.

The dependent claims define other possible embodiments of the invention, certain are preferred.

Compared to traditional lighting solutions, the invention provides the following advantages:

• maintaining the color rendering of illuminated objects over time, regardless of the otherwise light conditions;

• constant intensity avoid tiring the viewer's eye; • suppression of power consumption due to unnecessary wastage of ignition too powerful lighting;

improved visual comfort through the reduction or absence of deformation colors of illuminated objects.

The correction of the illumination device according to the invention is an automatic device, in that it requires no action by an operator to fill the continuous correction function. It is to maintain as constant as possible the amount and / or quality of the lighting in a given space while this space is illuminated by at least one other light source. The illuminated area may be semi-opened as, for example, a closed portion by at least two opaque walls which reflect more or less light and communicating with a space of larger dimensions or, alternatively, completely closed in all directions by more or less reflective opaque walls. The space can also be defined by at least one wall comprising an opening allowing the passage of light.

In this space, a lamp distributes light radiation. According to the invention, the luminaire comprises light emitting diodes ( "LED's).

At least one further light source also illuminates the space, for example, an electric incandescent light source, a fluorescent tube, electric bulb filled with a halogen vapors, light emitting diode, an electric arc, the light of the day. This light by the other source can be direct or indirect, for example, the diffuse daylight filtered cloud cover when the weather is overcast.

The correction of the illumination device according to the invention is composed of at least one transparent glass sheet. By glass sheet is intended to denote any glass plate thickness may vary between 1 and 50 mm. The thickness may vary at different points of the surface of the sheet. The surface may be planar or curved. However, preferred are flat glass sheets of constant thickness at all points of the surface. The glass may be formed either of one or more types of known glasses such as soda-lime glasses, glasses boron, crystalline and semicrystalline glasses. The glass must be transparent or translucent over the whole surface of the sheet. Sheets of clear glass and consistently neutral extra clear glass over the entire surface or ground leaves are preferred. For extra clear glass is meant a glass:

a) whose VAT4 light transmission by a standard light "A" by the CLE. (International Commission on Illumination) is at least 90.8% within 4 mm thick and a solid angle of 2 ° angle of observation

b) and whose color rendering coefficient under illuminant D65 light simulating a "day" standardized by CIE, is at least 99.6% within 4 mm thick and a solid angle of observation 2 ° angle.

The glass sheet may also be transparent or conversely, more or less filtering to light radiation lying within and beyond the frequencies of the visible spectrum.

According to the invention the correction device comprises correction means the light emitted by the luminaire. By correction means is meant means for modulating the intensity and / or the relative importance of one or more lines of the light spectrum emitted by the luminaire. These correction means are further bonded to the quantity and / or quality of light illuminating the space. By this is meant that it is precisely the quantity and / or quality of the light in the space which will control directly the operation of the correction device. According to a particular embodiment of the correction means, the device comprises at least two LED's of groups, each providing light of dominant wavelength λ separate. By dominant wavelength, the means defined in the system x, y, z tristimulus representation of the color according to the CIE to characterize the nature of the color of light emitted by an object. Preferably, the device comprises three groups of LED's each providing a separate light λ dominant length. More preferably still, the three LEDs emit groups qualified lights of red, green and blue. By red light it is meant herein a light whose dominant wavelength is in the wavelength range of 596-770 nm. Similarly, for green light means light of a dominant wavelength ranging from 489 nm to 571 nm and blue light by a dominant wavelength of light ranging from 430 to 488 nm.

According to the invention, the correction means comprise a system for measuring the intensity and / or color temperature of the light illuminating the space. For color temperature of light is meant the temperature of a blackbody that would emit light of the same spectrum as analyzed light. Preferably, this measuring system is made of electronic components, eg, components similar to those currently found in digital cameras. Alternatively, the measurement system can be measured, instead of the color temperature, the intensity of the three colors red characteristics, green and blue wavelength located in the range defined above.

According to another particular embodiment of the device according to the invention, consistent with the foregoing modes and which is preferred, the measurement system is incorporated into a control unit which continuously evaluates the difference in intensity and / or color temperature of light illuminating the area with that of a preset setpoint. Preferably, there is provided a control system provided with a closed loop feedback, by incorporating into the control unit a regulator which produces an electrical control signal on the basis of the difference in intensity and / or color temperature measured and sends this control signal to a feeding device of the LEDs of the luminaire in order to minimize this difference.

Even more preferably, the control unit is an electronic control module. According to the invention, it is also very advantageous if the luminaire includes various LED's groups and the control module.

A particularly interesting embodiment consistent with previous embodiments is one in which the LEDs and / or electronic control module embedded in at least one transparent plastic film sandwiched between two sheets of glass. It is also particularly advantageous that the glass sheets are clear glass or clear glass extra clear transparent.

In a particular embodiment, the device of the luminaire according to the invention is a light panel arranged at the upper part of a space to be illuminated.

In another particular embodiment, the luminaire is a motor vehicle roof glazing, greenhouse or veranda, transparent to light.

Another particular embodiment of the device according to the invention comprises a fixture that is a bright mirror. In the latter mode, the LEDs can be arranged in periphery of the reflecting surface. Alternatively, they can also be found at the back of the mirror, behind a semi-reflective layer.

Claims

1. An automatic correction of the illumination of an area illuminated by a lamp and at least one other light source, characterized in that the luminaire comprises at least one transparent glass sheet, light emitting diodes ( "LED's") and correcting the light emitted by the lighting means, interlocked to the quantity and / or quality of light illuminating the space.
2. Device according to Claim 1, characterized in that at least one of other light sources is daylight.
3. Device according to claim 1 or 2, characterized in that the intensity of the light emitted by the lamp is controlled by the intensity of the light illuminating the space.
4. Device according to claim 1 or 2, characterized in that the color of the light emitted by the lamp is controlled by the color of the light illuminating the space.
5. Device according to claim 4, characterized in that the correction means comprise at least two groups of LED's providing light of different dominant wavelengths.
6. Device according to at least one of the preceding claims, characterized in that the correction means comprise a system for measuring the intensity and / or color temperature of the light illuminating the space.
7. Device according to claim 6, characterized in that the measurement system is incorporated into a control unit which continuously evaluates the difference in intensity and / or color temperature of light illuminating the space with a preset setpoint and develops an electrical signal for controlling at least two groups of LED's to minimize that difference.
8. Device according to claim 7, characterized in that the control unit is an electronic module.
9. Device according to claim 8, characterized in that the luminaire comprises LEDs of different groups and the electronic control module.
10. Device according to claim 9, characterized in that the LED's and / or the electronic control module are embedded in at least one transparent plastic sheet sandwiched between two glass sheets.
11. Device according to any of the preceding claims, characterized in that the luminaire is a light panel arranged at the upper part of a space to be illuminated.
12. Device according to any of claims 1 to 10, characterized in that the luminaire is a motor vehicle roof glazing, greenhouse or veranda transparent to the light.
13. Device according to any of claims 1 to 10, characterized in that the luminaire is a light mirror.
PCT/EP2006/069999 2005-12-20 2006-12-20 Illumination correction device WO2007071722A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05112504 2005-12-20
EP05112504.5 2005-12-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060830755 EP1966534A1 (en) 2005-12-20 2006-12-20 Illumination correction device

Publications (1)

Publication Number Publication Date
WO2007071722A1 true true WO2007071722A1 (en) 2007-06-28

Family

ID=37865864

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/069999 WO2007071722A1 (en) 2005-12-20 2006-12-20 Illumination correction device

Country Status (2)

Country Link
EP (1) EP1966534A1 (en)
WO (1) WO2007071722A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29506194U1 (en) * 1995-04-10 1995-06-08 Wolters Paolo Window element for shielding and illumination of interiors
DE19853931A1 (en) * 1998-11-23 2000-06-08 Fraunhofer Ges Forschung Light deflection element has front surface structured to allow incident light into interior of element, where it is totally internally reflected and passes out into interior of room via outlet
WO2002047438A2 (en) * 2000-12-07 2002-06-13 Koninklijke Philips Electronics N.V. Led luminary system
US6411046B1 (en) * 2000-12-27 2002-06-25 Koninklijke Philips Electronics, N. V. Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control
DE20204263U1 (en) * 2002-03-17 2003-07-31 Doeppner Kunststoffenster Kg Building roof element
DE10306912A1 (en) * 2002-03-31 2003-12-04 Helmut Koester bulkhead lamp
EP1437215A1 (en) * 2003-01-10 2004-07-14 Glaverbel S.A. Glazing comprising a luminous element
US20050233125A1 (en) * 2002-08-06 2005-10-20 Christopher Anderson Laminated glass and structural glass with integrated lighting, sensors and electronics

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29506194U1 (en) * 1995-04-10 1995-06-08 Wolters Paolo Window element for shielding and illumination of interiors
DE19853931A1 (en) * 1998-11-23 2000-06-08 Fraunhofer Ges Forschung Light deflection element has front surface structured to allow incident light into interior of element, where it is totally internally reflected and passes out into interior of room via outlet
WO2002047438A2 (en) * 2000-12-07 2002-06-13 Koninklijke Philips Electronics N.V. Led luminary system
US6411046B1 (en) * 2000-12-27 2002-06-25 Koninklijke Philips Electronics, N. V. Effective modeling of CIE xy coordinates for a plurality of LEDs for white LED light control
DE20204263U1 (en) * 2002-03-17 2003-07-31 Doeppner Kunststoffenster Kg Building roof element
DE10306912A1 (en) * 2002-03-31 2003-12-04 Helmut Koester bulkhead lamp
US20050233125A1 (en) * 2002-08-06 2005-10-20 Christopher Anderson Laminated glass and structural glass with integrated lighting, sensors and electronics
EP1437215A1 (en) * 2003-01-10 2004-07-14 Glaverbel S.A. Glazing comprising a luminous element
WO2004062908A2 (en) * 2003-01-10 2004-07-29 Glaverbel Glazing comprising electronic elements

Also Published As

Publication number Publication date Type
EP1966534A1 (en) 2008-09-10 application

Similar Documents

Publication Publication Date Title
US6995355B2 (en) Optical integrating chamber lighting using multiple color sources
US7559664B1 (en) Low profile backlighting using LEDs
US6599000B2 (en) Interior lamp for producing white light using bright white LEDs
US5808778A (en) Electro-optic rearview mirror for automotive vehicles
US5251392A (en) Artificial window
US6550949B1 (en) Systems and components for enhancing rear vision from a vehicle
US5803579A (en) Illuminator assembly incorporating light emitting diodes
US5661578A (en) Color liquid crystal display backlight system for night vision imaging system compatibility
US20020167820A1 (en) Light-guiding system for the passenger compartment of a motor vehicle
US5662403A (en) Luminaire for interior lighting
US20070138966A1 (en) Lamp power tabulation
US20070175599A1 (en) Illuminated window blind assembly
US6842204B1 (en) Color display system for NVIS Class A compatibility
US20070171623A1 (en) Night vision compatible display backlight
US20030030063A1 (en) Mixed color leds for auto vanity mirrors and other applications where color differentiation is critical
JP2000173304A (en) Aviation marker lamp
WO2012080656A1 (en) System for controlling active glazing units for managing the colour of light in a building
US20070098969A1 (en) Light-guiding assembly and automotive vehicle roof
US20050231945A1 (en) Operating table lamp
WO1996032560A1 (en) Window assembly for screening and lighting inner rooms
JP2003212037A (en) Luminaire
JP2000148054A (en) Display window
JP2005338325A (en) Display apparatus
US7513671B2 (en) Efficient solid state light source for generating light in a limited region of the color space
US20080130305A1 (en) LED Lights for Interior Automotive Lighting

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2006830755

Country of ref document: EP

NENP Non-entry into the national phase in:

Ref country code: DE

WWP Wipo information: published in national office

Ref document number: 2006830755

Country of ref document: EP