EP2882261A1 - Améliorer la fiabilité d'un appareil d'éclairage - Google Patents

Améliorer la fiabilité d'un appareil d'éclairage Download PDF

Info

Publication number
EP2882261A1
EP2882261A1 EP13195803.5A EP13195803A EP2882261A1 EP 2882261 A1 EP2882261 A1 EP 2882261A1 EP 13195803 A EP13195803 A EP 13195803A EP 2882261 A1 EP2882261 A1 EP 2882261A1
Authority
EP
European Patent Office
Prior art keywords
light
lighting
light level
output signal
housing
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Withdrawn
Application number
EP13195803.5A
Other languages
German (de)
English (en)
Inventor
Tuomas Perkiö
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Helvar Oy AB
Original Assignee
Helvar Oy AB
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 Helvar Oy AB filed Critical Helvar Oy AB
Priority to EP13195803.5A priority Critical patent/EP2882261A1/fr
Publication of EP2882261A1 publication Critical patent/EP2882261A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback

Definitions

  • the invention relates to operation of a lighting module and/or a lighting apparatus.
  • embodiments of the present invention relate to an apparatus and a method for detecting an operating condition where the light output from a lighting module and/or a lighting apparatus is temporarily reduced e.g. due to snow, ice, dust, dirt and/or other obstacles degrading the light output from one or more light sources of the lighting module/apparatus.
  • a lighting apparatus operated outdoors or in another environment where the temperature may drop below freezing may suffer from ice forming on housing of the lighting apparatus, possibly degrading or completely blocking the light output from the lighting apparatus.
  • a lighting apparatus relying on light emitting diodes or other light sources of high energy efficiency (thus producing a low amount of heat as a by-product) formation of snow and/or ice that partially or even completely blocks the light output may cause a substantial reduction in the light output. While in all usage scenarios this is likely to lead to inconvenience due to lower-than-designed level of illumination, in certain usage scenarios, e.g. in case of a lighting apparatus used in car headlights or taillights, such problem may lead to serious consequences due to reduced visibility.
  • a lighting apparatus operated outdoors may suffer from dust and/or dirt (in addition to snow and/or ice) gathering on the surface of the lighting apparatus, thereby potentially causing reduced light output from the light apparatus.
  • a headlight or a taillight of a car serves as an example of such a usage condition.
  • dust and/or dirt may be gathered also on the surface of a lighting apparatus operated indoors, especially e.g. in a factory, in a garage, in a storage facility or in another industrial establishment but also in office rooms/spaces, meeting rooms and in recreational or domestic environments.
  • a lighting module capable of recognizing such a condition and possibly also capable of invoking measures to react to such a condition upon detection.
  • a lighting module is provided.
  • the lighting module may be provided for arrangement inside a housing that comprises a non-opaque portion for enabling light output from the lighting module, the lighting module comprising a base member, one or more light sources arranged on the base member, one or more light sensors arranged in locations on the base member such that they are insensitive to direct light emitted by the one or more light sources and such that they are sensitive to indirect light from the one or more light sources, and means for providing a first output signal based on light level observed by the one or more light sensors.
  • a lighting apparatus comprising a housing for hosting a lighting module, the housing comprising a non-opaque portion for enabling light output from the lighting module arranged inside the housing, a lighting module according to the first aspect of the invention arranged inside the housing such that the direct light emitted by the one or more light sources is directed towards the non-opaque portion of the housing and further such that the one or more light sensors are able to receive light arriving from direction of the non-opaque portion of the housing.
  • a lighting arrangement comprising a lighting module according to the first aspect of the invention or a lighting apparatus according to the second aspect of the invention.
  • the lighting arrangement further comprises a control portion configured to receive the first output signal and to invoke a predetermined action for facilitating or ensuring sufficient light output from the lighting module 100 in response to a comparison of the light level indicated in the first output signal to a reference light level indicating deviation exceeding a predetermined threshold.
  • Invoking the predetermined action may comprise issuing an indication regarding reduced light transmission via the non-opaque portion or issuing a heating control signal arranged to cause defrosting the non-opaque portion of the housing.
  • a method for controlling a lighting arrangement comprises receiving the output signal from the lighting module and invoking a predetermined action for facilitating or ensuring sufficient light output from the lighting module 100 in response to a comparison of the light level indicated in the first output signal to a reference light level indicating deviation exceeding a predetermined threshold.
  • invocation of the predetermined action may comprise issuing an indication regarding reduced light transmission via the non-opaque portion or issuing a heating control signal arranged to cause defrosting the non-opaque portion of the housing
  • a computer program for controlling a lighting arrangement according to the third aspect of the invention comprises one or more sequences of one or more instructions which, when executed by one or more processors, cause an apparatus to at least perform the method according to fourth aspect of the invention.
  • FIGs 1 a and 1 b schematically illustrate an exemplifying lighting module 100 in accordance with an embodiment of the present invention.
  • the lighting module 100 comprises one or more light sources 110 for providing the light output of the lighting module 100.
  • the lighting module further comprises one or more light sensors 120 for providing indication(s) of the observed light level. These indication(s) of the observed light level may be also considered as first measurement signal(s) descriptive of the observed light level.
  • Figure 1a provides a schematic 'side view' (e.g. a cross-section thereof) of the lighting module 100 such that the arrow A denotes general direction of the light output from the lighting module 100
  • Figure 1b provides a schematic 'top view' of the lighting module 100 from direction opposite to the direction indicated by the arrow A in Figure 1 b.
  • the light sources 110 and the light sensors 120 are arranged in locations on a base member 130 such that the light sensors 120 are insensitive to the direct light emitted by the light sources 110, in other words in locations (and positions) in which they are unable to receive direct light output from the light sources 110.
  • the light sensors 120 are arranged on the base member 130 such that they are sensitive to light arriving from direction opposite to the arrow A depicted in Figure 1 a. This may be accomplished e.g.
  • This 'detection angle' of the light sensor 120 is typically a few tens of degrees around the center axis of the sensing direction, e.g. [LA1] 50o around the center axis.
  • a light sensor of the light sensors 120 may be arranged in a position in which its center axis of the sensing direction is parallel or essentially parallel with the arrow A.
  • at least some of the light sensors 120 may be arranged in positions in which their center axes deviate from a direction parallel to the arrow A by a few degrees (e.g. up to 10o).
  • a person skilled in the art is able to envisage numerous ways to locate/position the light sensors 120 such that they are insensitive to the direct light emitted by the light sources 110 while being sensitive to light arriving from direction opposite to the arrow A.
  • FIG. 2 schematically illustrates an exemplifying lighting apparatus 200, comprising a housing 240 for enclosing a lighting module and the lighting module 100 arranged inside the housing 240.
  • the lighting apparatus 200 may serve any purpose of illumination, and it may be provided e.g. as a luminaire or a lighting fixture for indoor or outdoor use, as a headlight or a taillight (or another lighting device to be installed in) a vehicle, etc.
  • the housing 240 comprises a non-opaque portion 240a for enabling light output from the light sources 110 therethrough.
  • the non-opaque portion 240a is illustrated using a regular line, whereas the remaining portion of the housing 240 is illustrated using a bold line. This remaining portion of the housing 240 is typically made of opaque material.
  • the non-opaque portion 240a may be provided as a transparent portion, as a translucent portion, or as a portion of other type that enables light transmission therethrough.
  • the lighting module 100 is arranged inside the housing 240 such that the direct light emitted by the light sources 110 is directed towards the non-opaque portion 240a so that the light sources 110 are able to provide their light output through the non-opaque portion 240a.
  • the lighting module 100 is further arranged inside the housing 240 such that the light sensors 120 are able to receive light arriving from direction of the non-opaque portion 240a. This may be accomplished e.g. by arranging the lighting module 100 inside the housing 240 e.g. such that the light sensitive area(s) of the light sensors 120 are able to receive light from direction of the non-opaque portion 240a at an angle to which the light sensors 120 are sensitive.
  • the light sensors 120 are able to receive the ambient light that may able to enter the housing 240 through the non-opaque portion 240a. Moreover, in case there are one or more objects or material partially or completely covering the non-opaque portion 240a and thereby at least partially blocking the light output from the lighting apparatus 200, the light sensors 120 are able to receive the reflection of the light output of the light sources 110 from the blocking object(s)/material.
  • the level of light observed by the sensors may be applied as an indication regarding the possible blockage or the degree of blocking of the non-opaque portion 240a. Interpretation of the observed light level in this regard may depend on characteristics of the employed non-opaque portion 240a and/or the ambient lighting conditions.
  • the indication(s) of the observed light level indicate low observed light level in normal operating conditions of the lighting apparatus 200.
  • the indication(s) of the observed light level indicate high(er) observed light level in case there are objects/material covering at least part of the non-opaque portion 240a and hence partially or completely blocking the light output from lighting apparatus 200.
  • the indication(s) of the observed light level indicate low observed light level in normal operating conditions, whereas the indication(s) of the observed light level indicate high(er) observed light level in case there are objects/material on the non-opaque portion 240a partially or completely blocking the light output from lighting apparatus 200.
  • low observed light level may serve as an indication of normal operating conditions whereas a high(er) observed light level may indicated at least partially blocked light output.
  • typical objects or material that may block the light output include dust, dirt, ice or snow temporarily covering at least part of the non-opaque portion 240a.
  • the dashed arrows in Figure 2 illustrate an example of the light output from one of the light sources 110 and its reflection from (an object/material blocking the light output via) the non-opaque portion 240a.
  • the light sources 110 are, preferably, provided as light emitting diodes (LEDs) or other light sources that provide relatively narrow and directional beam of light.
  • LEDs light emitting diodes
  • the viewing angle may be 120o or even less. Consequently, in view of the 'detection angle' and locations/positions of the light sensors 120 described hereinbefore, for example arranging the light sources 130 on the base member 130 in positions in which their optical axes are parallel to the arrow A or deviate from a direction parallel to the arrow A by a few degrees (e.g. up to 10 o) typically ensures that the direct light output from the light sources does not enter the light sensitive areas of the light sensors 120 regardless of the relative locations of the light sources 110 and the light sensors 120.
  • a few degrees e.g. up to 10 o
  • a person skilled in the art is capable of envisaging numerous ways to locate/position the light sources 110 with respect to the light sensors 120 such that the light sensors 120 are insensitive to the direct light emitted by the light sources 110 while being sensitive to light arriving from direction opposite to the arrow A.
  • the lighting module 100 may be provided as a component integrated to housing 240 (and/or other components of the lighting apparatus 200), e.g. in a lighting apparatus comprising the lighting module 100.
  • the lighting module 100 may be provided separately from the lighting apparatus 200 for subsequent arrangement inside the housing 240 such that the light output is provided through the non-opaque portion 240 and that the light sensors 120 are able to receive light arriving from direction of the non-opaque portion 240a - and are hence also able to receive the possible reflection of the light output of the light sources 110 from an object partially or completely covering the non-opaque portion 240a.
  • the number of light sources 110 may be selected in accordance with the characteristics of the employed light sources 110 in view of the desired level of light output from the lighting module 100.
  • the number of the light sensors 120 may be selected in view of desired level of reliability and accuracy of the measurement of the reflected light. Hence, it may be sufficient to employ a single light sensor 120. Typically, however, the number of light sensors 120 is increased with the increasing number of light sources 110.
  • the light sensors 120 are preferably evenly or essentially evenly distributed over the area of the base member 130 in order to facilitate detection of possible reflections from objects disturbing the light output throughout the area of the non-opaque portion 240a.
  • the constellation of the light sources 110 illustrated in Figures 1a, 1b and 2 i.e. in two rows with a row of first light sensors 120 therebetween serves as a non-limiting example only, and any constellation or arrangement of the light sources 110 and the first light sensors 120 may be applied without departing from the scope of the present invention.
  • Arrangement of the light sources 110 and the first light sensors 120 in a single-piece planar base member 130 serves as a non-limiting example only, and base members 130 of different shape and construction may be applied instead.
  • the base member 130 may be e.g. a circuit board serving as an installation platform e.g. for LEDs employed as the light sources 110 and the light sensors 120.
  • the circuit board may include further components, such as electrical components for controlling operation of the light sources 110 and/or the light sensors 120, electrical wirings between the light sources 110, electrical wirings coupling the light sources 110 and the light sensors 120 to a power supply, electrical wirings for coupling the light sensors 120 to an output line, etc.
  • the lighting module 100 further comprises means for providing an output signal based on light level observed by the light sensors 120 to facilitate or enable estimation of the light transmission through the non-opaque portion 240a.
  • the output signal may be provided to a control entity, which may be provided as part of the lighting module 100, as part of the lighting apparatus 200 or as an external control entity or control portion.
  • the output signal may be considered to represent the observed light level L, which may serve as an indication of the level of light received through the non-opaque portion 240a, the level of light reflected from an object covering at least part of the non-opaque portion 240a or a combination of the two.
  • the output signal may be derived on basis of the indications received from the light sensors 120.
  • the output signal may provide the light level indication (or measurement signal) received from a single light sensor 120 as such.
  • the output signal may be derived as a combination, e.g. as the sum or as the average, of the light level indications (or measurement signals) received from a plurality of light sensors 120.
  • FIG. 3 schematically illustrates an exemplifying lighting arrangement 300 comprising the lighting apparatus 200 hosting the lighting module 100 that is electrically coupled to a control portion 350.
  • the control portion 350 may be provided as hardware means, as software means, or as a combination of hardware means and software means.
  • the control portion 350 may be provided as a driver apparatus 360 or as a portion of the driver apparatus 360 for driving the operation of the lighting module 100 or the lighting apparatus 200 (e.g. as a LED driver or a portion thereof).
  • the control portion 350 and/or the driver 360 may be further coupled to an external control entity 370.
  • the external (or remote) control entity may be arranged to provide commands or instructions for controlling the operation of the control portion 350 and/or the driver 360 and further arranged to receive signals and/or indications from the control portion 350 and/or from the driver 360.
  • control portion 350 may be provided separately from the lighting apparatus 200 for subsequent installation to form the lighting arrangement 300.
  • control portion 350 may be provided together with the lighting module 100 but without the housing 240 or other (further) components of the lighting apparatus 200 for subsequent installation to form the lighting arrangement 300.
  • the control portion 350 is arranged to receive the output signal from the lighting module 100, the control portion 350 hence arranged to receive an indication of the observed light level L.
  • the control portion 350 is further configured to invoke, at least in part on basis of the light level L, a predetermined action for facilitating or ensuring sufficient light output from the lighting module 100.
  • control portion 350 may be configured to compare the observed light level L to a predetermined reference light level L ref and to invoke the predetermined action indicating deviation from the reference light level L ref to exceed a predetermined threshold.
  • control portion 350 may be configured to invoke the predetermined action in response to the comparison indicating the difference between the observed light level L and the reference light level L ref to exceed a predetermined threshold Th L .
  • the predetermined action may be invoked e.g. in response one of the following:
  • a first (lower) predetermined threshold ratio e.g. if R L ⁇ Th R1
  • a second (higher) predetermined threshold ratio e.g. if R L > Th R2
  • the threshold Th L or the thresholds Th R1 and Th R2 may be applied as configurable parameters, which may be pre-set or predetermined in view of the (intended) operating environment of the lighting module 100 or the lighting apparatus 200 and/or in view of desired sensitivity to light level deviations from the reference light level L ref . Configuration of the thresholds Th L or the threshold Th R1 and Th R2 may take place e.g. upon installation or maintenance of the lighting arrangement 300.
  • the reference light level L ref may be applied as a configurable parameter that is set or configured upon installation or maintenance of the lighting arrangement 300.
  • the control portion 350 may be arranged to store (e.g. in a memory provided in the control portion 350) currently indicated observed light level L as the reference light level L ref for subsequent use in response to a request.
  • the request to record a new value for the reference light level L ref may be issued e.g. as part of the installation/maintenance process or in another situation where undisturbed light transmission through the non-opaque portion 240a is guaranteed.
  • control portion 350 may be configured to invoke the predetermined action in response to the difference exceeding the threshold Th L for at least a predefined period of time T A .
  • time T A may be set to a value in the range from a few seconds to a few minutes. Using a sufficiently high value of T A facilitates avoiding false alarms e.g. due to accidental short term blocking of the non-opaque portion 240a or due to at least some of the light sensors 120 temporarily observing light originating from an external (possibly non-stationary) light source.
  • the predetermined action may comprise the control portion 350 providing an indication to the external (remote) control entity 370 regarding reduced light output or light transmission through the non-opaque portion 240a. Consequently, the external control entity 370 may be arranged to trigger an indication or request for maintenance operation to be carried out due to compromised illumination by the lighting apparatus 200 hosting the lighting module 100, which may e.g. result in a maintenance person cleaning up or replacing the light apparatus 200 to ensure proper illumination.
  • the external control entity 370 may receive such indications/requests from (control portions of) a plurality of light apparatuses and it may be arranged to trigger the indication/request for maintenance in response to at least a predetermined number or at least a predetermined percentage of the light apparatuses having indicated reduced light output.
  • the lighting apparatus 200 may be provided with a heating arrangement for defrosting the non-opaque portion 240a in control of a heating signal
  • the predetermined action may comprise the control portion 350 (or e.g. the external control entity 370) issuing the heating control signal causing the heating arrangement to apply heating to defrost the non-opaque portion 240a.
  • the heating may be applied e.g. for a predetermined period of time or until the condition that resulted issuing the heating control signal no longer holds.
  • the control portion 350 (or the external control entity 370) may apply a predefined maximum time for continuous defrosting of the non-opaque portion 240a.
  • Applying the heat may be especially beneficial when applying LEDs or other light sources of high energy efficiency (hence producing a low amount of heat as a by-product) as the light sources 110 in a lighting module 100 for use in a lighting apparatus for use outdoors or indoor environments where the temperature may drop below zero.
  • the heating arrangement may comprise one or more heating resistors arranged in the lighting module 100 on the base member 130. While such an approach facilitates providing a housing 240 of simple and durable structure, on the other hand the defrosting performance may be compromised due to distance between the heating resistor(s) and the non-opaque portion 240a of the housing 240.
  • the heating arrangement may comprise one or more heating wires arranged in the non-opaque portion 240a, e.g. on an inner surface of the non-opaque portion 240 or between layers of a non-opaque portion 240a having a two-layer or a multi-layer structure. Such an approach enables applying the heat directly where needed in order to defrost the non-opaque portion 240a, while on the other hand it may make the structure of the housing slightly more complex.
  • Figure 4 schematically illustrates a lighting arrangement 400 comprising the lighting apparatus 200 hosting the lighting module 100 that is electrically coupled to a control portion 450.
  • the control portion 450 may be provided as hardware means, as software means, or as a combination of hardware means and software means, e.g. as a driver apparatus 460 or as a portion of the driver apparatus 460 for driving the operation of the lighting module 100 or the lighting apparatus 200 (e.g. as a LED driver or a portion thereof).
  • the control portion 450 and/or the driver 460 may be further coupled to the external control entity 370 arranged to control operation of the operation of the control portion 450 and/or the driver 460.
  • the lighting arrangement 400 further comprises one or more external light sensors 420 for measuring the ambient light level outside the housing 240.
  • the external light sensors 420 are arranged in locations in the vicinity of the lighting apparatus 200 such that they are insensitive to both direct and indirect light emitted by the light sources 110 of the lighting module 100.
  • the external light sensors 420 may be provided as an external sensor arrangement comprising means for providing a (second) output signal based on (ambient) light level observed by the external light sensors 420.
  • the (second) output signal may provide the light level indication (or a measurement signal) received from a single external light sensor 420 as such or the (second) output signal may be derived e.g. as the sum or as the average of the light level indications (or measurement signals) received from a plurality of external light sensors 420.
  • control portion 450 is arranged to receive the output signal from the lighting module 100 and hence to receive the indication of the observed light level L as observed by the light sensors 120.
  • the control portion 450 is further configured to receive the (second) output signal from the sensor arrangement, thereby being arranged to receive the indication of the ambient light level L ext outside the housing 240 of the lighting apparatus 200.
  • the operation of the control portion 450 is similar to that of the control portion 350 with the exception of setting the reference light level L ref .
  • the control portion 450 is configured to use the ambient light level L ext as basis for deriving the reference light level.
  • Figure 5 illustrates a method 500 for controlling operation of the lighting arrangement 300, 400.
  • the method 500 comprises receiving the output signal from the lighting module 100, i.e. receiving the indication of the light level L observed by the light sensors 110, as indicated in block 510.
  • the method 500 further comprises comparing the observed light level L indicated in the output signal to the reference light level L ref , as indicated in block 520.
  • the reference light level L ref may be set based on the observed light level L or based on an indication of the ambient light level L ext outside the housing 240, as described hereinbefore.
  • the method 500 continues with evaluating whether the deviation between the observed light level L and the reference light level L ref exceeds a predetermined threshold, as indicated in block 530 (indicted in block 530 as a simple non-equality operation for brevity). In case the deviation between the observed light level L and the reference light level L ref is found to exceed a predetermined threshold (examples of which are described hereinbefore), the method 500 proceeds to invoking the predetermined action, as indicated in block 540.
  • the predetermined action may comprise issuing an indication to the external control entity 370 or issuing the heating control signal in order to defrost the non-opaque portion 240a.
  • the method 500 proceeds back to block 510.
  • the method 500 may be varied in a number of ways, e.g. in view of the examples concerning operation of the lighting arrangement 300, 400 and/or the control portion 350, 450 provided hereinbefore.
  • FIG. 6 schematically illustrates an exemplifying apparatus 700 that may be employed for embodying the control portion 350, 450.
  • the apparatus 700 comprises a processor 710 and a memory 720, the processor 710 being configured to read from and write to the memory 720.
  • the apparatus 700 may further comprise a communication interface 730 for enabling communication with another apparatuses or portions and/or a user interface 740 for receiving data and/or other input from a user and/or presenting information to the user.
  • the apparatus 700 may comprise further components not illustrated in the example of Figure 6 .
  • processor 710 is illustrated as a single component, the processor 710 may be implemented as one or more separate components.
  • memory 720 is illustrated as a single component, the memory 720 may be implemented as one or more separate components, some or all of which may be integrated/removable and/or may provide permanent/semi-permanent/ dynamic/cached storage.
  • the memory 720 may store a computer program 750 comprising computer-executable instructions that control the operation of the apparatus 700 when loaded into the processor 710 and executed by the processor 710.
  • the computer program 750 may include one or more sequences of one or more instructions.
  • the computer program 750 may be provided as a computer program code.
  • the processor 710 is able to load and execute the computer program 750 by reading the one or more sequences of one or more instructions included therein from the memory 720.
  • the one or more sequences of one or more instructions may be configured to, when executed by one or more processors, cause an apparatus, for example the apparatus 700, to implement the operations, procedures and/or functions described hereinbefore in context of the control portion 350, 450.
  • the apparatus 700 may comprise at least one processor 710 and at least one memory 720 including computer program code for one or more programs, the at least one memory 720 and the computer program code configured to, with the at least one processor 710, cause the apparatus 700 to perform the operations, procedures and/or functions described hereinbefore in context of the control portion 350, 450.
  • the computer program 750 may be provided independently of the apparatus, and the computer program 750 may be provided at the apparatus 700 via any suitable delivery mechanism.
  • the delivery mechanism may comprise at least one computer readable non-transitory medium having program code stored thereon, the program code which when executed by an apparatus cause the apparatus at least implement processing to carry out the operations, procedures and/or functions described hereinbefore in context of the control portion 350, 450.
  • the delivery mechanism may be for example a computer readable storage medium, a computer program product, a memory device a record medium such as a CD-ROM, a DVD a Blue-ray Disc, a corresponding optical media, an article of manufacture that tangibly embodies the computer program 750, etc.
  • the delivery mechanism may be a signal configured to reliably transfer the computer program 750.
  • references to a processor should not be understood to encompass only programmable processors, but also dedicated circuits such as field-programmable gate arrays (FPGA), application specific circuits (ASIC), signal processors, etc.
  • FPGA field-programmable gate arrays
  • ASIC application specific circuits
  • Signal processors etc.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP13195803.5A 2013-12-05 2013-12-05 Améliorer la fiabilité d'un appareil d'éclairage Withdrawn EP2882261A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13195803.5A EP2882261A1 (fr) 2013-12-05 2013-12-05 Améliorer la fiabilité d'un appareil d'éclairage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13195803.5A EP2882261A1 (fr) 2013-12-05 2013-12-05 Améliorer la fiabilité d'un appareil d'éclairage

Publications (1)

Publication Number Publication Date
EP2882261A1 true EP2882261A1 (fr) 2015-06-10

Family

ID=49752996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13195803.5A Withdrawn EP2882261A1 (fr) 2013-12-05 2013-12-05 Améliorer la fiabilité d'un appareil d'éclairage

Country Status (1)

Country Link
EP (1) EP2882261A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002099333A1 (fr) * 2001-06-07 2002-12-12 Koninklijke Philips Electronics N.V. Luminaire a del dote de configurations de detecteur de lumiere pour retroaction optique
WO2004100265A2 (fr) * 2003-05-08 2004-11-18 Koninklijke Philips Electronics N.V. Systeme de diodes electroluminescentes integrees
WO2006054234A2 (fr) * 2004-11-19 2006-05-26 Koninklijke Philips Electronics N.V. Luminaire a del a retroaction optique obtenue par cartographie d'images sur des capteurs de lumiere segmentes
JP2010027441A (ja) * 2008-07-22 2010-02-04 Panasonic Electric Works Co Ltd 照明器具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002099333A1 (fr) * 2001-06-07 2002-12-12 Koninklijke Philips Electronics N.V. Luminaire a del dote de configurations de detecteur de lumiere pour retroaction optique
WO2004100265A2 (fr) * 2003-05-08 2004-11-18 Koninklijke Philips Electronics N.V. Systeme de diodes electroluminescentes integrees
WO2006054234A2 (fr) * 2004-11-19 2006-05-26 Koninklijke Philips Electronics N.V. Luminaire a del a retroaction optique obtenue par cartographie d'images sur des capteurs de lumiere segmentes
JP2010027441A (ja) * 2008-07-22 2010-02-04 Panasonic Electric Works Co Ltd 照明器具

Similar Documents

Publication Publication Date Title
US8242431B2 (en) Automated de-icing system for low power lighting apparatus
KR101907207B1 (ko) 자동차 외부 가시거리를 검출하기 위한 방법 및 센서 장치
JP6014291B2 (ja) 領域における検知
CN102955937A (zh) 用于确定将光发射和/或反射至车辆的对象的对象类别的方法
US10328843B2 (en) Driving assistance system with short-distance ranging
JP2017508260A (ja) 多方式感知
TR201807900T4 (tr) Batarya ile çalışan ışık seviyesi algılama cihazı.
WO2009115202A3 (fr) Capteur optique et procédé de détection d'objets
JP2003337657A (ja) 光学式タッチパネル装置
JP6031245B2 (ja) 物体検出装置、物体検出方法、物体検出用プログラム及び情報記録媒体
CN109005254B (zh) 基于滑动机构的信息指示方法、控制组件和电子设备
EP2882261A1 (fr) Améliorer la fiabilité d'un appareil d'éclairage
US8536531B2 (en) Proximity sensing apparatus and sensing method thereof
KR101510844B1 (ko) 차량용 비상등 점멸시스템 및 그 작동방법
KR102552480B1 (ko) 헤드램프의 단선 검출 방법
US20150068442A1 (en) Instrument panel with pointer position detection
US20240102938A1 (en) Artifact-based fault detection for physical components
US20240102939A1 (en) Light-based fault detection for physical components
JP6158678B2 (ja) 光電センサ
US20240112324A1 (en) Wavelength-based fault detection for physical components
US20220148533A1 (en) Detecting image freezing in a video displayer
US9228721B2 (en) LED PAPI with condensation protection
CN115327510B (zh) 自适应漫反射物体检测方法以及漫反射式物体检测装置
JP7194846B2 (ja) 照明デバイス
JP2019039807A (ja) レインセンサ

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 20131205

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

R17P Request for examination filed (corrected)

Effective date: 20151210

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20171005

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

18D Application deemed to be withdrawn

Effective date: 20180216