Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
  • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
  • G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0101—Head-up displays characterised by optical features
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
  • G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
  • G06F3/04815—Interaction with a metaphor-based environment or interaction object displayed as three-dimensional [3D], e.g. changing the user viewpoint with respect to the environment or object
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
  • B60K2360/20—Optical features of instruments
  • B60K2360/31—Virtual images
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
  • B60K2360/20—Optical features of instruments
  • B60K2360/33—Illumination features
  • B60K2360/334—Projection means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
  • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
  • B60K35/213—Virtual instruments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
  • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
  • B60K35/23—Head-up displays [HUD]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
  • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
  • B60K35/23—Head-up displays [HUD]
  • B60K35/233—Head-up displays [HUD] controlling the size or position in display areas of virtual images depending on the condition of the vehicle or the driver
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
  • B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/80—Arrangements for controlling instruments
  • B60K35/81—Arrangements for controlling instruments for controlling displays
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0101—Head-up displays characterised by optical features
  • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0101—Head-up displays characterised by optical features
  • G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/0101—Head-up displays characterised by optical features
  • G02B2027/0141—Head-up displays characterised by optical features characterised by the informative content of the display
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/09626—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages where the origin of the information is within the own vehicle, e.g. a local storage device, digital map
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2320/00—Control of display operating conditions
  • G09G2320/06—Adjustment of display parameters
  • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

• the present invention relates generally to devices for assisting the driving of motor vehicles.
• It relates more particularly to a method for controlling an image generation device of a head-up display for a motor vehicle, comprising:
• a head-up display for a motor vehicle comprising:
• a computer adapted to acquiring data relating to the operation and / or the environment of the motor vehicle, and to controlling the image generation device such that it generates an image comprising at least two information to assist driving, depending on the data acquired.
• a head-up display adapted to project information (speed of the vehicle, direction to follow, malfunction of the engine, presence of obstacles, ...) at the height of the driver's gaze.
• the displays of the first type use an image forming device comprising a diffuser and a scanning unit designed to generate a light beam scanning an entrance face of the diffuser.
• the light beam at the output of the diffuser thus forms an image, which can then be projected into the field of vision of the driver of the vehicle.
• the displays of the second type use a screen that generates an image, which is then projected into the driver's field of vision.
• the head-up displays therefore have two major ergonomic constraints.
• the first constraint is that the number of information projected in the driver's field of vision must remain limited.
• the second constraint is that in the presence of many information fixed in content, form, brightness, the driver gets used to them and no longer takes care of information that could, at a given moment, be particularly important.
• the present invention proposes to gradually eliminate the non-value-added information, so that only useful information remains in the driver's field of vision.
• control step is intended to modulate in time the light intensity of at least one piece of information relative to one another.
• the light intensity of the other information (the latter can be considered equal to a nominal reference light intensity).
• the deletion of information will be done gradually, so as not to unnecessarily attract the eye of the driver.
• the display of new important information will preferably be done fairly quickly, to attract the eye of the driver.
• control step it is expected to modulate the light intensity of said information continuously;
• the acquisition step it is intended to acquire the value of at least one parameter relating to the traffic conditions of the motor vehicle, and in the control step, it is intended to modulate the light intensity.
• said information as a function of the variations of the value of said parameter;
• the luminous intensity of said information is modulated to vary between a plateau of maximum intensity and a plateau of minimum intensity
• the luminous intensity of said information is controlled to remain equal to the minimum intensity step, and as soon as the value of said parameter varies substantially, the luminous intensity of said information is increased. up to the plateau of maximum intensity where it is kept constant, then, as soon as the value of the parameter has remained substantially constant for a predetermined duration, the light intensity of said information is reduced to the minimum intensity level.
• the invention also proposes a head-up display as defined in the introduction, in which the image generation device is adapted to independently vary the light intensity of each piece of information, and in which the computer is adapted to control the image generating device so as to modulate in time the light intensity of each information with respect to each other.
• the computer is adapted to acquire the value of at least one parameter relating to the traffic conditions of the motor vehicle and to vary the light intensity of one of the information taking into account variations in the value of said parameter;
• the computer is adapted to vary the light intensity of one of the information between a plateau of maximum intensity and a plateau of minimum intensity.
• FIG. 1 is a schematic view of a first embodiment of a head-up display according to the invention
• FIG. 2 is a schematic view of a second embodiment of a head-up display according to the invention.
• FIGS. 3A and 3B are synchronous graphs illustrating the variation in time of the speed of a motor vehicle (FIG. 3A) and the light intensity of information appearing on an image generated by a head-up display ( Figure 3B); and
• FIG. 4 is a schematic view of an image generated by a head-up display.
• FIGS. 1 and 2 show two embodiments of a head-up display 10 for equipping a vehicle, for example a motor vehicle.
• the head-up display 10 comprises an image generation unit 1 1 driven by a computer 13, and an optical projection unit 12.
• the image generation unit 11 is of the "light modulation” type. It includes a screen, here an LCD (or LCD for “Liquid Crystal Display”) thin-film transistors (or TFT for "Thin-Film Transistor”). It also includes a backlight device located at the back of the screen. This backlighting device comprises a plurality of light-emitting diodes distributed behind the liquid crystal of the screen.
• the image generation unit 11 is of the "emissive" type. It comprises a diffuser 1 6 and a scanning unit which generates a light beam of variable direction so as to scan the rear face of the diffuser 1 6.
• the scanning unit more specifically comprises a beam forming module 14 and a mirror mobile 15, for example made in the form of an electromechanical microsystem (or MEMS for "MicroElectroMechanical System”).
• the beam forming module 14 typically comprises three monochromatic light sources, such as laser sources, whose respective (monochromatic) light beams are combined (for example using dichroic mirrors) to form the polychromatic light beam ( here laser) emitted at the output of the beam forming module 14.
• This light beam generated by the beam forming module 14 is directed towards the moving mirror 15, whose orientation is controlled by a control module so that the reflected light beam (by the movable mirror 15) sweeps the rear face of the diffuser 1 6.
• the image generation unit 1 1 makes it possible, under the control of the computer 13, to generate an image that the projection optical assembly 12 will be able to project into the driver's field of view when the look of the latter is turned towards the road.
• the projection optical assembly 12 is more specifically designed to project a virtual image lmg 0 in the field of vision of the driver of the vehicle, at a distance from the driver that is greater than that separating the driver from the windshield 1 (so that the eyes of the driver do not have to perform work of accommodation to collect projected information).
• the optical projection unit 12 comprises a deflection optical system 17 and a combiner 18 placed in the field of vision of the driver of the vehicle.
• the optical return system 17, which here only includes a folding mirror, makes it possible to send the image generated by the image generation unit 1 1 to the combiner 18.
• the combiner 18 makes it possible to reflect this image in such a way that it appears to the driver as if it were displayed outside the vehicle.
• this combiner 18 is formed by a semi-reflecting blade which is arranged in the passenger compartment of the motor vehicle, between the windshield 1 of the vehicle and the eyes of the driver, and which is curved so as to enlarge the size of the vehicle. virtual image lmg 0 seen by the driver.
• the semi-reflective element could be the windshield itself.
• the computer 13 is designed to drive the image generation unit 11, so that the head-up display 10 can project useful information into the field. of vision of the driver.
• This computer 13 comprises a processor (CPU), a random access memory (RAM), a read only memory (ROM), analog-digital converters (A / D), and different input and output interfaces.
• CPU central processing unit
• RAM random access memory
• ROM read only memory
• a / D analog-digital converters
• the computer 13 is adapted to receive input signals from different sensors or other computers.
• the computer 13 may be connected to the main communication network of the vehicle (BUS-CAN type), in order to read the data sought.
• the computer 13 can thus acquire various data relating to the operation and / or the environment of the motor vehicle.
• This data is for example acquired through sensors fitted to the vehicle.
• the computer 13 also acquires vehicle guidance data, such as, for example:
• These data are for example acquired through a navigation system and geolocation fitted to the vehicle.
• the computer 13 finally acquires data relating to the safety of the vehicle, such as, for example:
• the read-only memory stores data used in the context of the method described below.
• the computer 13 is adapted to transmit control signals to the image generation device 1 1, so that the latter generates an image with different distinct information, useful for driving the image. motor vehicle.
• FIG. 4 to illustrate the present invention, it is shown schematically what the driver can see through the combiner 18.
• a fuel level information item 21 which corresponds to an estimate of the distance that can still be traveled before a fuel outage
• an instantaneous speed information 22 which corresponds to the instantaneous speed of the motor vehicle (this speed possibly being filtered beforehand so as not to take into account disturbances or insignificant variations in speeds),
• a speed limit information 23 which corresponds to the authorized speed limit on the route taken (this information being equal to the speed limit Vmax acquired by the computer),
• a regulation speed information 24 which corresponds to the speed that the driver has programmed on his cruise control
• an obstacle information 27 presented here in the form of a line highlighting the presence of an obstacle, namely here the motor vehicle 31, and
• a distance information 28 which corresponds to the distance separating the vehicle from this obstacle.
• the computer 13 is adapted to control the image generation device 1 1 so as to modulate in time the light intensity of at least one information with respect to the light intensity. other information.
• the image generation device 1 1 is adapted to independently vary the light intensity of each image information. virtual lmg 0 .
• this variation in light intensity can for example be done by varying the light intensity emitted by some of the light-emitting diodes of the backlighting device.
• this variation in light intensity can for example be done by varying the light intensity emitted by some or all of the monochromatic light sources.
• the computer 13 is adapted to control the image generation device 1 1 by transmitting to it a set of instructions comprising data relating to the shape of the image to be displayed and data relating to the luminous intensity. with which the different parts of the image should appear.
• the computer 13 acquires the data relating to the operation and / or the environment of the motor vehicle (listed above). It acquires, in particular, the instantaneous speed V of the motor vehicle and the speed limit Vmax allowed on the traffic lane used by the vehicle.
• the computer 13 processes all the data acquired so as to derive driving assistance information 21 to 28 (listed above), which can be projected into the field of view of the vehicle. driver.
• the computer 13 During a third step, the computer 13 generates an image that includes said driving assistance information 21 to 28, then calculates and assigns each of these information a light intensity. This luminous intensity corresponds to the intensity with which the corresponding information must be displayed.
• the computer 13 modulates in time the intensity at least one of these driving assistance information items 21 to 28.
• the manner in which the computer 13 calculates the luminous intensity of the three pieces of information such as the instantaneous speed information 22, the speed limitation information, can be illustrated by way of illustration. 23 and the fuel level information 21.
• this maximum intensity l max may be invariable or may vary on the contrary, for example depending on the ambient light conditions.
• the fuel level information 21 is considered essential only when the distance that can still be traveled before failure passes below a predetermined threshold (for example 200 kilometers). Therefore, its luminous intensity l 2 i is set equal to zero as long as said distance remains greater than this threshold, then it is set equal to the maximum intensity l max when said distance falls below this threshold.
• a predetermined threshold for example 200 kilometers
• the speed limit information 23 is considered as sometimes essential, given the traffic conditions of the motor vehicle. Therefore, its luminous intensity l 2 3 is modulated in time according to a parameter relating to the traffic conditions of the motor vehicle.
• the speed limit information 23 is considered essential only when the speed limit Vmax changes. Therefore, its luminous intensity l 2 3 is time-modulated as a function of the speed limit variations Vmax.
• FIG. 3A shows the evolution of the instantaneous speed V of the motor vehicle.
• FIG. 3B shows, in a synchronous manner, the variation corresponding to the light intensity l 2 3 assigned by the computer 13 to the speed limit information 23.
• the luminous intensity l 23 is more precisely modulated to vary between a maximum intensity step l max and a minimum intensity level l 0 .
• the luminous intensity l 2 3 is controlled to remain equal to the minimum intensity step l 0 .
• the luminous intensity l 2 3 is increased to a maximum intensity level l max where it is kept constant at least during the duration ⁇ .
• the variation of the luminous intensity 23 of the speed limitation information 23 is continuous (and not abruptly, in stages).
• t is equal to the time from which the ⁇ 23 light intensity starts to vary with a change of level ( Figure 3B, it will be successively instants to, to ', ti , tT).
• the constant I H corresponds to the maximum intensity that the image generation device 11 can provide.
• the coefficient a will be chosen in such a way that the transition of brightness is done more or less quickly. In practice, this coefficient a, will be chosen greater at times t 0 and ti (during a speed limit change Vmax) than at times t 0 'and tT.
• the coefficient will be between 0 and 1 (limits included).
• Its value can be modified to take into account the ambient light. It can for example be reduced in night display mode and increased in daytime display mode.
• the parameter which is taken into account to control the intensity ⁇ 23 is not the speed limit Vmax, but rather the instantaneous speed V of the vehicle.
• the instantaneous speed of the vehicle is “substantially constant” (that is to say as long as the speed differences remain below a determined threshold for a given period of time)
• it can maintain the intensity ⁇ 23 at a low level.
• it is possible to increase the intensity 23 as soon as the speed of the vehicle changes sharply.
• the advantage of this solution is that if the speed limit Vmax has not changed but for any reason the vehicle is accelerating suddenly, the speed limit information 23 will be displayed again to remind the driver which the speed limit Vmax.
• the intensity of the information vehicle guidance eg direction information 25, distance information before branching 26, information of the name of the route taken, .

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Optics & Photonics (AREA)
• Human Computer Interaction (AREA)
• Computer Hardware Design (AREA)
• Instrument Panels (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Traffic Control Systems (AREA)

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• 2016
  • 2016-07-05 FR FR1656442A patent/FR3053804B1/fr active Active
• 2017
  • 2017-06-30 US US16/315,669 patent/US20190244553A1/en not_active Abandoned
  • 2017-06-30 CN CN201780052732.7A patent/CN109997103A/zh active Pending
  • 2017-06-30 WO PCT/EP2017/066399 patent/WO2018007269A1/fr not_active Ceased
  • 2017-06-30 EP EP17733860.5A patent/EP3482284A1/de not_active Withdrawn

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