EP4064792A1 - Stirnlampe, die mit einer verbesserten dynamischen beleuchtung ausgestattet ist - Google Patents

Stirnlampe, die mit einer verbesserten dynamischen beleuchtung ausgestattet ist Download PDF

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Publication number
EP4064792A1
EP4064792A1 EP21164886.0A EP21164886A EP4064792A1 EP 4064792 A1 EP4064792 A1 EP 4064792A1 EP 21164886 A EP21164886 A EP 21164886A EP 4064792 A1 EP4064792 A1 EP 4064792A1
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EP
European Patent Office
Prior art keywords
light
information
control module
lut
headlamp
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.)
Pending
Application number
EP21164886.0A
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English (en)
French (fr)
Inventor
Christophe Marie
Nicolas BEAURENT
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Zedel SAS
Original Assignee
Zedel SAS
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Publication date
Application filed by Zedel SAS filed Critical Zedel SAS
Priority to EP21164886.0A priority Critical patent/EP4064792A1/de
Priority to TW111108423A priority patent/TW202240099A/zh
Priority to US17/703,478 priority patent/US11519591B2/en
Priority to CN202210306213.1A priority patent/CN115134975A/zh
Publication of EP4064792A1 publication Critical patent/EP4064792A1/de
Pending legal-status Critical Current

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    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0492—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting a change in orientation, a movement or an acceleration of the lighting device, e.g. a tilt switch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
    • F21V21/084—Head fittings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0464—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
    • G08B21/0407—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis
    • G08B21/043—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis detecting an emergency event, e.g. a fall
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/17—Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission

Definitions

  • the present invention relates to the field of headlamps equipped with so-called Reactive Lighting technology, and in particular a headlamp comprising an accelerometric sensor.
  • the applicant of the present patent application has marketed a portable lamp, of the headlamp type, equipped with so-called reactive or dynamic lighting, the operating principle of which is illustrated in the figure 1 .
  • This headlamp has an electronic circuit equipped with a sensor that analyzes the external brightness to instantly deliver an adjusted lighting power and an optimal beam shape for the situation.
  • This type of lamp has proven to be particularly suitable for committed and intensive sports because it relieves the user of the manual mode adjustments that would be necessary to switch between different beam power thresholds.
  • Reactive Lighting Thanks to this reactive lighting technique ( Reactive Lighting ), the user has his hands free and his mind completely focused on his activity, whatever the lighting situation considered.
  • the user can thus observe or examine an object at a short distance (reading a map, making a tie-up knot or setting up a tent for example) and the lamp can protect a very wide and low-power light beam, automatically set to a minimum threshold value thanks to this dynamic lighting technique.
  • the lighting automatically adapts to the distance of the object.
  • the beam becomes mixed: wide at the level of the feet and focused to see at a few meters and anticipate the relief .
  • Reactive Lighting has proved to be particularly economical in use and makes it possible to advantageously increase the autonomy of the batteries since its implementation, under the control of a calculator, aims to optimize battery consumption, offering greater autonomy for your lamp.
  • this reactive or dynamic lighting technology is undeniably a significant advance in the field of headlamps, and more generally of portable lighting, in particular in that it allows the lighting to be constantly adapted. to lighting conditions.
  • the minimum level of light may in practice prove to be insufficient to guarantee safe lighting when crossing with a luminous or natural obstacle (car headlights, tree branch, etc.).
  • the previously noted discomfort zone may then turn out to be a danger zone.
  • the aim of the present invention is to propose a significant improvement to dynamic lighting technology by making it possible to take into consideration specific lighting situations requiring additional lighting.
  • Another object of the present invention consists in proposing a headlamp provided with the light regulation of the reactive or dynamic type having an improved adjustment of the light power.
  • the control module further comprises an accelerometer configured to supply at regular intervals data representative of an acceleration of the headlamp along at least one horizontal axis and one vertical axis; and wherein the control module includes circuitry configured to store and process accelerometry data to select a chosen physical activity profile from a set of predetermined physical activity profiles stored in a memory.
  • the selected physical activity profile is then used as an input pointer to read a correspondence table LUT stored in an internal memory of the lamp, and which provides at least one value or one parameter serving to generate information or the signal control fixing the light output.
  • a correspondence table LUT stored in an internal memory of the lamp, and which provides at least one value or one parameter serving to generate information or the signal control fixing the light output.
  • the value or parameter read from the lookup table LUT is used in conjunction with the information generated by the light sensor to determine the light output control information or signal.
  • the set of predetermined accelerometer profiles includes profiles representative of walking, running and cycling.
  • the power of the light beam set by the control unit varies between a low threshold and a high threshold, and the low threshold is set by a value which is extracted directly from the LUT look-up table from the automatically selected profile. .
  • the processing of the accelerometer data allowing the selection of the predetermined profile uses a statistical processing method based on a calculation of the variance of the accelerometer data along the two horizontal axes and along the vertical axis.
  • the data extracted from the LUT table make it possible to define a minimum light power threshold and a specific geometry of the light beam chosen between a wide beam, a pointed beam and/or both.
  • the light is a headlamp configured to process accelerometer data to detect a user's fall in addition to their physical activity, and configured to communicate with a mobile phone for the purpose of transmitting a message of alert.
  • control module in the event of a fall, is configured to control a light alert sequence aimed at calling for help.
  • the mechanism for regulating the light power is arranged so as to integrate, in addition to the information emanating from the luminosity sensor, other additional information generated by an accelerometric sensor supplying acceleration signals on one or more X1, Y1 or Z1 axis.
  • a specific algorithm which will be described in detail below, makes it possible to set lighting thresholds generated by the light power regulation system, and in particular a minimum lighting threshold.
  • the figure 2 illustrates the general architecture of an embodiment of a lamp 100 - assumed to be frontal - comprising a reactive or dynamic light intensity regulation system based on a sensor 120 making it possible to measure the ambient luminosity and/or part of the flux reflected by the illumination of the headlamp.
  • the lamp 100 also comprises an accelerometric sensor, and preferably a three-dimensional (3D) acceleration sensor 110 making it possible to generate accelerometric information along at least one axis and preferably three axes X1, Y1, Z1 particularly illustrated in the figure 8 , the axes X1 and Z1 being horizontal and the axis Y1 being vertical.
  • an accelerometric sensor and preferably a three-dimensional (3D) acceleration sensor 110 making it possible to generate accelerometric information along at least one axis and preferably three axes X1, Y1, Z1 particularly illustrated in the figure 8 , the axes X1 and Z1 being horizontal and the axis Y1 being vertical.
  • the lamp 100 comprises a power module 210 associated with a control module 220 and a lighting unit 230 comprising at least one light-emitting diode LED and, optionally, a transmitter-receiver module 240 coupled to the control module and a battery module 250 also coupled to control module 220.
  • the lighting unit 230 comprises a single LED diode 231 equipped with its power supply circuit 232 connected to the power module 210.
  • the LED diode(s) can be associated with its own focal optics 233 making it possible to ensure collimation of the light beam generated.
  • the current supply to the diode LEDs 231 via the circuit 232 is performed by the power module under the control of information or a control signal generated by the control module 220 via a link which may take the form of a conductor or a set of conductors constituting a bus.
  • a link which may take the form of a conductor or a set of conductors constituting a bus.
  • the figure shows more particularly the particular example of a conductor 225.
  • the power module 210 specifically comprises all the components that are conventionally encountered in an LED lighting lamp for the production of a high intensity light beam, and in general based on Pulse Width Modulation PWM ( or Pulse Width Modulation in Anglo-Saxon literature), well known to a person skilled in the art and similar to that encountered in class D audio circuits.
  • This PWM modulation is controlled by means of the control signal 225 generated by the control module 220.
  • the term " signal " mentioned above refers to an electrical quantity - current or voltage - making it possible to cause the control of the power module, and in particular the PWM modulation used to supply the LED diode 231 with current.
  • control signal 225 any "control information", for example logic information stored in a register and transmitted as has been said by any suitable means to the power module 210 in order to control the emission power of the light beam.
  • the control signal can therefore be transmitted on different media depending on whether it is a signal or information.
  • These supports can be a bus-type communication line coupling the control module and the power module or a simple electronic circuit for transferring a control voltage or current. In a particular embodiment, it is even possible to envisage the two control and power modules being integrated into a single module or integrated circuit.
  • control signal 225 A person skilled in the art will therefore easily understand that when one refers to a "control signal 225 ", one encompasses indiscriminately the realizations using an electrical control quantity - current or voltage - as well as the realizations in which the control is carried out by means of logic information transmitted within the power circuit. For this reason, reference will be made hereinafter indistinctly to signal or control information .
  • control module 220 comprises a processor 221 as well as volatile memories 222 of the RAM type and non-volatile (flash, EEPROM) 223 as well as one or more input/output circuits 224.
  • volatile memories 222 of the RAM type
  • non-volatile (flash, EEPROM) 223 as well as one or more input/output circuits 224.
  • the memories RAM and non-volatile are for storing data and firmware or firmware instructions.
  • the non-volatile memory 223 is also used to store data representative of physical activity profiles which will be used jointly with the accelerometer data provided by the accelerometric sensor 110 as will be described later.
  • the headlamp also comprises a battery module 250 having a controller 252 and a battery 251 for example of the Ion-Lithium type.
  • control module 220 can access each of the other modules present in the lamp, and in particular the power module 210, the battery module 250, the two brightness 120 and accelerometer 110 sensors as well as , if applicable, to the communication module 240 allowing two-way (upward-downward) wireless communication with a smart phone 300 or any other wireless communication device.
  • the access of the control module 220 to the various components of the headlamp may take various forms, either by means of specific circuits and/or conductors or a set of conductors forming a bus.
  • the link 225 is represented in the figure 2 in the form of a conductor while a real data/address/command bus 226 is used for the exchange of information between the control module 220, the battery module 250 and the transmitter/receiver module 240. It
  • this is only a particular embodiment, it being understood that a person skilled in the art may carry out various modifications and/or adaptations if necessary to take account of the requirements specific to the application envisaged.
  • control module 220 can both read and collect information contained in each of these modules and/or conversely, transfer information, data and/or commands thereto, such as this will come out more clearly in the remainder of the presentation.
  • control module 220 can send the power module a control signal as represented by the signal transmitted on the link 225 and, more generally, can read the current value of the supply current of the diode 231 transiting via conductors 232 (via circuits and/or buses not shown in the figure).
  • control module 220 can access the battery module 250 via the bus 226 to read there either the different voltage values (depending on the charge or discharge cycle in progress) at the terminals thereof and/or the value the intensity delivered in order to be able to calculate a state of charge (SOC or State Of Charge in the Anglo-Saxon literature).
  • SOC State Of Charge in the Anglo-Saxon literature
  • the control module 220 comprises a communication module 240 allows a two-way wireless link with a mobile information processing system or mobile telephone 300.
  • the transmitter as well as the receiver will be compatible with the Bluetooth standard, preferably with the Bluetooth 4.0 Low energy standard.
  • the WIFI or IEEE802.11 standard will be adopted instead.
  • the module 240 includes a baseband unit (not shown) coupled to a wireless receiver and transmitter, making it possible to organize an uplink communication channel (uplink- Uplink ) to the mobile telephone 300 and, in the opposite direction , a downlink communication channel to this same phone.
  • the communication module 240 may be required to perform various processing operations, in series or in parallel, on the digital representation of the signal received and to transmit, and in particular, operations of filtering, statistical calculation, demodulation, channel coding/decoding to make the communication robust to noise, etc.
  • processing operations are well known in the field of signal processing, in particular when it comes to isolating a particular component of a signal, likely to carry digital information, and it does not it will not be necessary here to weigh down the exposition of the description.
  • the processor 221 is therefore responsible for interpreting the packets received as well as for formatting the packets for transmission according to a format specific to the standard used. Thus in the case of the Bluetooth Low Energy standard, these packets will have a structure around the standardized Generic Attribute Profile (GATT) which will not be detailed here. Depending on the interpretation of the data bits included in the packets received, the processor will reconstruct any information or commands received on the downlink from the mobile information processing system 300. Having interpreted this information or commands, the processor 221 will then relay or convert this information or command to the module concerned.
  • GATT Generic Attribute Profile
  • the processor 221 identifies commands to the attention of the power module 210 in order to modify the light intensity and in reaction to this identification is capable of generating command information on the conductor 225 to destination of the power module 210 so that the latter proceeds to modify the light intensity generated by the lighting unit 230.
  • processor 221 may also identify read requests from associated mobile information processing system 300 to cause the headlamp to send certain parameters to telephone 300 on the uplink.
  • These requests can thus be a request for the state of charge of the battery or the value of the current light power.
  • the processor 221 will retrieve the necessary information directly from the module concerned and after performing any additional calculations on this information to obtain the final required information (in the case of the state of charge for example as seen above), will format a corresponding data packet for transmission by transceiver module 240.
  • the picture 2 describes a basic embodiment, and that many other embodiments are possible and within the reach of a person skilled in the art.
  • other modules could be added within the headlamp and these modules will also be coupled to the processor 221 via the bus 226 for example.
  • These modules can then also exchange uplink or downlink data or commands with the associated mobile information processing system 300 which can then communicate with the headlamp and transmit various configuration commands to it by means of a dedicated application. running on smart phone.
  • This dedicated application then makes it possible to coordinate the various functionalities of the headlamp by offering in particular a user-friendly interface by means of which the latter can either enter operating parameters, or come directly to control the headlamp or select different options to the features offered.
  • the control module 220 of the headlamp 100 implements a dynamic or reactive lighting technique.
  • This technique consists of replacing the well-known manual adjustment modes - based on various pre-adjusted light power values such as low, medium or high, with a more automatic technique making it possible to leave the adjustment of the light power to the control module 220 and more specifically to a regulation algorithm executed by the processor 221 under the control of a regulation firmware stored in non-volatile memory 223.
  • the processor 221 adjusts the light power according to the value of the ambient luminosity measured by the sensor 120, for example by selecting a value chosen from a set of N predefined threshold values .
  • Such a mechanism of regulation is therefore similar to an adjustment mechanism by discrete steps within a finite set of power values, allowing the control module 220 to control the headlamp by passing successively from one adjustment value to another value chosen from the set of predetermined values.
  • the reactive or dynamic brightness mechanism therefore allows automatic adjustment of the headlamp to the correct value at within the N predetermined values.
  • the geometry of the light beam can be adjusted automatically by the selection, via the control module 220, of a diffusion mode chosen from a set of several predetermined modes: for example wide, narrow, or both in same time.
  • a person skilled in the art may consider a more sophisticated regulation mechanism based on a true servo-control integrating the value of the luminosity within a feedback loop which may or may not be linear, in order to fix the power of the light beam generated by the module 230.
  • error correction mechanisms could be conveniently integrated within the feedback loop, in particular a proportional (P), proportional-integral (PI) correction, or even Proportional Integral Differential (PID) etc..., used with suitable parameters.
  • the regulation of the dynamic or reactive lighting could be advantageously improved by introducing an exploitation of the accelerometer data ⁇ x , ⁇ y and ⁇ z generated by the three-dimensional accelerometric sensor 110, as will now be described.
  • the three-dimensional accelerometer module 110 provides accelerometer signals ⁇ x, ⁇ y and ⁇ z along three trigonometric axes X1, Y1 and Z1. As depicted in the figure 8 , the axes X1 and Z1 are horizontal while the axis Y1 is a vertical axis and, moreover, the axes X1 and Y1 are arranged in a sagittal plane relative to the user.
  • the picture 3a illustrates typical timing diagrams of the signals ⁇ x, ⁇ y and ⁇ z for a walking physical activity.
  • the figure 3b illustrates typical timing diagrams of the same ⁇ x, ⁇ y and ⁇ z signals for a bicycle physical activity.
  • FIG. 3c illustrates typical timing diagrams of ⁇ x, ⁇ y, and ⁇ z signals for running physical activity.
  • the figure 4a illustrates more particularly the profile of the acceleration ⁇ x
  • the figures 4b and 4c illustrate the profiles of the accelerations ⁇ y and ⁇ z, respectively.
  • the profiles of these accelerations ⁇ x, ⁇ y and ⁇ z are very characteristic and are clearly distinguished according to the three physical activities considered: Walking; bicycle or bicycle; running or jogging.
  • the headlamp control module 100 is configured to come and execute a method for detecting a physical activity profile, detected within a set of N predetermined profiles.
  • the control module 220 is configured in such a way that the non-volatile memory 223 comprises a memory zone in which is stored data representative of several physical activity profiles, and preferably the data representative of the activities " walking ", " running “ and “ cycling “. Furthermore, the non-volatile memory 223 also comprises a zone intended for the storage of a micro-program allowing the processing of the accelerometer data ⁇ x, ⁇ y and ⁇ z generated on the fly by the 3D accelerometric module 110.
  • This algorithm goes, as it will be detailed later in relation to the figure 5 , comparing the data ⁇ x, ⁇ y and ⁇ z generated in real time with data stored in memory 223 which are characteristic of the predetermined profiles (walking, cycling, running) stored in the memory.
  • the algorithm aims to reconcile, at regular intervals, the accelerometer data with a determined profile so as to bring the signals generated by the accelerometer into the predefined physical activity category, i.e. that corresponding to the different profiles stored in the memory of the headlamp.
  • the figure 5 illustrates a light regulation method in accordance with the present invention, based jointly on the detection of the ambient luminosity of the exploitation of accelerometer data.
  • the method In a step 510, the method generates at regular intervals, for example every 20 milliseconds, a set of accelerometer data ⁇ x, ⁇ y and ⁇ z supplied by the 3D accelerometer module 110.
  • the method may be limited to only part of the accelerometer data, for example the single datum ⁇ y along the vertical direction Y1.
  • a step 520 the method performs the storage of the data ⁇ x, ⁇ y and ⁇ z within the random access memory RAM 222.
  • the accelerometer data ⁇ x, ⁇ y and ⁇ z undergo digital processing making it possible to select a physical activity profile within a set of N predetermined profiles stored in memory not -volatile 223.
  • Several methods can be used to carry out the selection or detection of the physical activity profile and will be described in more detail in section V of the present description.
  • a step 540 the method uses the profile selected in step 530 as an input pointer to access a look-up table (LUT -Look-up table ) in which are stored values and parameters specific to the regulation mechanism dynamic or reactive applied by the control module 220 of the headlamp 100, and allowing the generation of the information or the control signal 225 transmitted to the power module 210.
  • a look-up table LUT -Look-up table
  • the parameters read in the correspondence table LUT correspond to threshold values loaded into registers used by the reactive or dynamic regulation algorithm.
  • the parameters are reduced to a threshold value corresponding to a minimum of lighting considered by the dynamic regulation algorithm.
  • the reading of the correspondence table makes it possible to provide these threshold values.
  • the accelerometric data ⁇ x, ⁇ y and ⁇ z are defined the minimum value of the luminosity, but possibly also the maximum value of the light power.
  • the method reads the LUT table and extracts the parameter(s) stored therein and, in the case of the preferred embodiment which is particularly economical to implement, the method extracts the minimum threshold value that should be applied to the reactive or dynamic light regulation mechanism.
  • a step 560 the reactive or dynamic light regulation mechanism is executed by using the value(s) extracted from the LUT table so as to precisely adapt this regulation, and if necessary the feedback loop. reaction coming to fix the light power generated by the headlamp to adapt it to the physical activity identified in step 530.
  • the control information or the control signal transmitted via the conductor 225 is generated from the value or values extracted from the LUT, together with the information provided by the light sensor 120.
  • the dynamic or reactive regulation is therefore applied so as to ensure, in all cases, a minimum light power corresponding to the threshold value extracted from the LUT table.
  • the LUT table may conveniently include, in addition to the minimum threshold value mentioned above, one or more additional parameters making it possible to fix the geometry of the beam, and in particular the fact of using a wide or narrow collimation, or even a combination both. Provision could even advantageously be made to extract from the LUT table the proportions of distribution of the light power over the three wide, mixed and pointed beams as a function of the physical activity detected.
  • step 570 the method loops to step 510 to read and process new accelerometer data ⁇ x, ⁇ y and ⁇ z.
  • the reactive or dynamic light regulation mechanism is advantageously enriched by the contribution of accelerometer data obtained on the fly from the accelerometer 110, and which the control module 220 processes to bring the processed data closer to a predetermined physical activity profile stored in the non-volatile memory 223 which, once identified, makes it possible to consult the LUT table so as to extract the most appropriate parameters and adjustment values for the light regulation.
  • the figure 6 illustrates the effect of the process which has just been described in which it is seen that the low level threshold set without the contribution of accelerometry data remains at the same level whatever the activity considered, for example walking (part left of the figure), running (middle part of the figure) and cycling or mountain biking (right part of the figure). If this low level does not pose any difficulty for a walking-type activity, we observe on the other hand that this same low level presents a zone of discomfort for a running activity and even becomes a danger zone for a mountain biking-type activity. .
  • the process described in figure 5 makes it possible to mount the low level threshold, to adapt it to a first higher level for a running activity and to mount it to an even higher second level for a mountain biking type activity, so that the user does not is never in the discomfort zone represented in the middle part of the figure 6 and even less in the danger zone of the right part of this same figure.
  • the method allows finer adaptation of the light power determined according to a reactive or dynamic regulation method, which takes account of the profile of physical activity considered.
  • the X1 and Y1 axes are placed in a sagittal plane relative to the user.
  • Each elementary accelerometer is configured to provide a time series of elementary acceleration values along their corresponding axis.
  • the first time series supplied by the first elementary accelerometer, forms a first elementary raw signal, designated by S 1 b ( t, ⁇ ), which varies according to time t and the motion profile ⁇ of the 3D acceleration sensor by relative to the local terrestrial reference.
  • the second time series provided by the second elementary accelerometer, forms a second elementary raw signal, denoted by S 2 b ( t, ⁇ ), which varies as a function of time t and of the motion profile ⁇ of the 3D acceleration sensor relative to the local terrestrial reference.
  • the third time series supplied by the third elementary accelerometer, forms a third elementary raw signal, denoted by S 3 b ( t, ⁇ ) , which varies as a function of time t and of the motion profile ⁇ of the 3D acceleration sensor by relative to the local terrestrial reference.
  • the movement profile ⁇ of the 3D acceleration sensor is for example that of a walker, designated by ⁇ 1, that of a cyclist, designated by ⁇ 2, or that of a runner, designated by ⁇ 3.
  • ⁇ 1 that of a walker, designated by ⁇ 1
  • ⁇ 2 that of a cyclist, designated by ⁇ 2
  • ⁇ 3 runner
  • the control module 220 comprises a digital electronic circuit - which could advantageously be produced by means of the processor 221 associated with its memory or by means of any other specialized digital signal processor (DSP ) and which is configured to process only one or at least two of the raw signals S 1 b ( t, ⁇ ), S 2 b ( t, ⁇ ), S 3 b ( t, ⁇ ) supplied by the 3D acceleration sensor according to a method 700 or algorithm of signal processing and determination of the movement profile of the 3D acceleration sensor illustrated in the figure 7 , and finally allowing the detection of the physical activity useful to the method of the figure 5 .
  • DSP digital signal processor
  • the 700 process of the figure 7 includes an initial optional filtering step 710, followed by a feature extraction step 720, then a decision step 730 by thresholding.
  • one or more of the raw signals S 1 b ( t, ⁇ ), S 2 b ( t, ⁇ ), S 3 b ( t , ⁇ ) are respectively filtered into new signals, called useful signals and denoted by S 1 u ( t, ⁇ ) , S 2 u ( t, ⁇ ) , S 3 u ( t, ⁇ ), in which the useful information is still present but where the harmful information, called “noise” (here electronic noise from the 3D acceleration sensor), is either suppressed or weakened.
  • the global information contained in the signal therefore has a certain degree of specialization at this level.
  • the raw signals S 1 b ( t, ⁇ ), S 2 b ( t, ⁇ ), S 3 b ( t, ⁇ ) are respectively identical to the useful signals S 1 u ( t, ⁇ ), S 2 u ( t, ⁇ ), S 3 u ( t, ⁇ )
  • the useful signals S 1 u ( t, ⁇ 0), S 2 u ( t, ⁇ 0) and S 3 u ( t, ⁇ 0), respectively illustrated on a first curve 802, a second curve 804, a third curve 806, are typically those of a 3D acceleration sensor having the form 808 of a reference movement profile ⁇ 0 , corresponding to a movement of low amplitude or almost zero of the 3D acceleration sensor.
  • the useful signals S 1 u ( t, ⁇ 1), S 2 u ( t, ⁇ 1) and S 3 u ( t, ⁇ 1), respectively illustrated on a fourth curve 822, a fifth curve 824 and a sixth curve 826 are typically those of a 3D acceleration sensor having the form 828 of a motion profile ⁇ 1 of a walker.
  • the useful signals S 1 u ( t, ⁇ 2) , S 2 u ( t, ⁇ 2) and S 3 u ( t, ⁇ 2), respectively illustrated on a seventh curve 842, an eighth curve 844 and a ninth curve 846 are typically those of a 3D acceleration sensor having the form 848 of a movement profile ⁇ 2 of a cyclist (in English “biking”).
  • the useful signals S 1 u ( t, ⁇ 3) , S 2 u ( t, ⁇ 3) and S 3 u ( t, ⁇ 3), illustrated respectively on a tenth curve 862, an eleventh curve 864 and a twelfth curve 866 are typically those of a 3D acceleration sensor having the form 868 of a motion profile ⁇ 3 of a runner (in English “jogging”).
  • the object of the feature extraction step 720 is to extract from at least one of the useful signals S 1 u ( t, ⁇ ), S 2 u ( t, ⁇ ), S 3 u ( t, ⁇ ) a finite set of several parameters, if possible independent, representative of the observed phenomenon, and allowing it to be described.
  • step 720 allows in other words the passage of a useful vector or scalar signal to data.
  • a signal can be seen as a set of points for which each point has a high degree of dependence (deterministic or statistical) with its neighbors.
  • Data represent a set of points where this notion of neighborhood is less important.
  • the intermediate entities then carry either the name of signal, estimator, or data.
  • the main goal of feature extraction is to obtain, from the useful signal, mutually independent data that exhaustively represent the phenomenon to be interpreted.
  • the useful signals studied here can be characterized by elementary estimators which are the moments of these signals: the mean (moment of order 1), and the pseudo-standard deviation (moment of order 2) are the better known and more widely used.
  • an estimator can be a function of one or more moments of the same useful signal.
  • Est(S2) is the statistical variance of the useful signal S 2 u ( t, ⁇ ) .
  • the type of displacement profile of the lamp is determined by thresholding on the East estimator ( S 2)( ⁇ ).
  • the dimension of the problem of estimating the displacement profile of the lamp is considered equal to 3.
  • the three elementary variables are formed by the respective statistical variances Est(S1)( ⁇ ), Est (S2)( ⁇ ), Est(S3)( ⁇ ), useful signals S 1 u ( t, ⁇ ), S 2 u ( t, ⁇ ), S 3 u ( t, ⁇ ) .
  • the type of displacement profile of the lamp is determined by thresholding on the scalar estimator East ( S 1 , S 2, S 3)( ⁇ ).
  • the physical activity profile identified by the control module 220 is transmitted by the wireless link to the mobile telephone 300 so that the latter can inform, at any time, of the activity physical activity detected automatically according to the above technique to, if necessary, allow the user to come and correct the detection and allow adaptive learning of the method for detecting physical activity.
  • the headlamp is configured to read accelerometer data ⁇ x, ⁇ y and ⁇ z on the fly to determine the fall of the user and, in this case, to trigger a procedure of emergency.
  • the procedure may be based on the sending of an alert signal to the mobile telephone so as to initiate the generation of an emergency message, of the SMS or e-mail type.
  • the alert procedure will include the activation of the lamp for the generation of an alert light sequence, such as for example a MORSE coding of the well-known sequence S.O.S.
  • the invention is not limited to headlamps alone and may be used applied to a hand lamp.

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  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Social Psychology (AREA)
  • Business, Economics & Management (AREA)
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  • Gerontology & Geriatric Medicine (AREA)
  • General Health & Medical Sciences (AREA)
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  • Psychiatry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electromagnetism (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP21164886.0A 2021-03-25 2021-03-25 Stirnlampe, die mit einer verbesserten dynamischen beleuchtung ausgestattet ist Pending EP4064792A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21164886.0A EP4064792A1 (de) 2021-03-25 2021-03-25 Stirnlampe, die mit einer verbesserten dynamischen beleuchtung ausgestattet ist
TW111108423A TW202240099A (zh) 2021-03-25 2022-03-08 包括改進的動態照明的頭燈
US17/703,478 US11519591B2 (en) 2021-03-25 2022-03-24 Headlamp comprising improved dynamic lighting
CN202210306213.1A CN115134975A (zh) 2021-03-25 2022-03-25 包括改进的动态照明的头灯

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EP21164886.0A EP4064792A1 (de) 2021-03-25 2021-03-25 Stirnlampe, die mit einer verbesserten dynamischen beleuchtung ausgestattet ist

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012146256A2 (en) * 2011-04-28 2012-11-01 Lighten Aps A lighting system and a method for locally changing light conditions
US20160258599A1 (en) * 2014-02-14 2016-09-08 Zedel S.A. Portable Lamp Fitted with Electric Control of the Geometry of the Beam
US20200187331A1 (en) * 2016-05-04 2020-06-11 Ideapond Llc Adaptive flashlight control module

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3017691B1 (fr) * 2014-02-14 2019-06-28 Zedel Lampe electrique portative dotee d'un systeme de communication sans-fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012146256A2 (en) * 2011-04-28 2012-11-01 Lighten Aps A lighting system and a method for locally changing light conditions
US20160258599A1 (en) * 2014-02-14 2016-09-08 Zedel S.A. Portable Lamp Fitted with Electric Control of the Geometry of the Beam
US20200187331A1 (en) * 2016-05-04 2020-06-11 Ideapond Llc Adaptive flashlight control module

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US20220307678A1 (en) 2022-09-29
US11519591B2 (en) 2022-12-06
CN115134975A (zh) 2022-09-30

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