Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
  • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
  • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
  • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
  • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
  • B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
  • B60Q1/10—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution
  • B60Q1/115—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution by electric means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
  • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
  • F21S41/657—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by moving light sources
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
  • F21S41/141—Light emitting diodes [LED]
  • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
  • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/28—Cover glass
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
  • F21S41/32—Optical layout thereof
  • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
  • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
  • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
  • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
  • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
  • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
  • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
  • B60Q2300/10—Indexing codes relating to particular vehicle conditions
  • B60Q2300/13—Attitude of the vehicle body
  • B60Q2300/132—Pitch

Definitions

• the screen has at least one curvature around a direction perpendicular to the optical axis, the space being delimited by vertical and transverse planes passing through edges delimiting the screen.
• the screen is configured such that it presents in at least one plane comprising the optical axis, and in particular at least one vertical plane or a transverse plane, a curved profile.
• curved profile we understand that the screen has a shape which is not contained in a plane. More generally, curved means that at least one of the internal and external faces, as defined below, is not contained in a plane.
• the vertical and transverse planes are to be considered as planes respectively perpendicular to the longitudinal optical axis, and perpendicular to each other. It should be noted that the naming of these plans is arbitrary and may be independent of a vertical or transverse orientation of the vehicle on which the lighting device is intended to be installed.
• the screen can be configured so as to present a curved profile in a vertical plane comprising the optical axis and a curved profile in a transverse plane comprising the optical axis.
• the space which is crossed according to the invention by the axis of rotation of the light module is delimited by vertical and transverse planes passing by edges delimiting the screen, or more particularly edges delimiting the main area of the screen.
• the screen is fixed relative to a projector housing fixed to a motor vehicle, so that it is held in position when the light module moves from one position to another.
• the screen comprises a zone peripheral to the main zone configured to at least partially diffuse additional light rays. It is understood that the additional light rays are different from the light rays constituting the light beam. The additional light rays are used here for example for signaling.
• the lighting device comprises at least one additional source configured to generate additional light rays.
• the screen has an internal face oriented towards the light module, an external face oriented towards the outside of the lighting device and two opposite side edges between which the internal face extends transversely. and the external face.
• the lighting device comprises a controllable liquid crystal screen constituting at least the main zone of the screen, the controllable liquid crystal screen being able to take on states of transparency different including at least one projection state and one diffusion state.
• the projection state corresponds more particularly to a state in which the controllable liquid crystal screen is transparent, that is to say a state in which the screen allows the light beam to pass without significant disturbance.
• the controllable liquid crystal screen comprises two transparent walls between which extends a controllable liquid crystal polymer which, when stimulated by an electric current, takes on an optical state different from its initial state.
• the lighting device comprises a controllable liquid crystal screen control member intended to change the controllable liquid crystal screen from a projection state to a diffusion state and Conversely.
• the controllable liquid crystals When the controllable liquid crystals are in a projection state, the light beam extends along the optical axis, while when the controllable liquid crystals are in a diffusion state, the light beam bounces into the screen on the controllable liquid crystals and gives a diffuse appearance to the lighting device.
• the projection state corresponds to a state in which the controllable liquid crystal screen is transparent, without significant impact on the propagation of the light beam passing through it while the diffusion state corresponds to a state in which it is desired that the screen has a diffusing impact on the light beam.
• controllable liquid crystal screen comprises at least two portions, the control member being capable of changing the state of one and/or the other of the portions of the controllable liquid crystal screen.
• One of the portions of the controllable liquid crystal screen forms the main zone, and the other portion forms the peripheral zone.
• the lighting device comprises a housing on which is fixed on the one hand the screen and on the other hand the system for moving the light module.
• the invention also relates to a motor vehicle equipped with at least one lighting device according to the present presentation.
• FIG. i is a schematic representation of a lighting device according to the invention, making in particular visible a light module made mobile in rotation within a projector housing by a rotational movement device represented schematically;
• FIG. 2 is a schematic representation of two different positions of the light module within the lighting device of Figure i, an example of a rotational movement device being shown in more detail;
• FIG. 3 is a simplified representation of the projector housing making visible terminals delimiting a space within which the axis of rotation of the light module must pass;
• FIG. 4 is a simplified representation of the projector housing, in a section plane other than that of Figure 3, making other boundaries of this space visible.
• a longitudinal direction corresponds to a direction parallel to the optical axis of a light beam generated by the lighting device, this longitudinal direction being parallel to a longitudinal axis L of a mark L, V, T illustrated in the figures.
• a transverse direction corresponds to a direction parallel to an axis of rotation of a light module of the lighting device, this transverse direction being parallel to a transverse axis T of the mark L, V, T and this transverse axis T being perpendicular to the longitudinal axis L.
• a vertical direction corresponds to a direction parallel to a vertical axis V of the reference L, V, T, this vertical axis V being perpendicular to the longitudinal axis L and the transverse axis T.
• a lighting device 1 configured to be mounted on a motor vehicle and to project a light beam, and in particular a low beam type lighting beam intended to illuminate the road in front of the motor vehicle on which he is equipped. More precisely, the lighting device 1 comprises a light module 2 configured to generate the light beam mainly along a longitudinal optical axis L and a screen 4 having a main zone 6 through which the light beam is projected and a zone peripheral 7 which borders the main zone 6.
• the light module 2 here generates the light beam which is guided towards the main zone 6 of the screen 4 to thus be projected onto the road at the front of the motor vehicle in order to illuminate the road at the front of the motor vehicle while being visible to other road users.
• Transition edges 67 and transverse transition edges 76 are arbitrarily defined as being the junction zones of the screen between the main zone 6 and the peripheral zone 7, respectively arranged on either side of the zone main in the vertical direction V and in the transverse direction T.
• the lighting device 1 comprises a housing 8 having an opening, on which the screen 4 is fixed and in which the light module 2 is housed.
• the screen 4 closes at least partially the opening of the housing 8, presenting an external face 10 oriented towards the outside of the lighting device 1, and an internal face 12 which contributes to delimiting at least partly a housing of the light module 2.
• the lighting device 1 comprises at least one additional source configured to generate additional light rays.
• the additional source can for example include several light-emitting diodes, commonly called LEDs.
• the lighting device 1 comprises a controllable liquid crystal screen 32 constituting at least the main zone 6 of the screen 4, the controllable liquid crystal screen 32 being capable of taking on states of different transparency including at least one projection state and one diffusion state.
• the controllable liquid crystal screen 32 comprises two walls transparent between which extends a controllable liquid crystal polymer which, when stimulated by an electric current, takes on an optical state different from its initial state.
• the transparent walls are optically neutral, and that it is the controllable liquid crystal polymer which impacts the state of the controllable liquid crystal screen 32, by authorizing or not the diffusion of light rays through the zone. main 6 of said screen 4.
• the liquid crystals suspended in the controllable liquid crystal polymer orient themselves differently depending on whether they are electrically stimulated or not. Indeed, when they are electrically stimulated, the liquid crystals organize themselves so that the light beam passes through the screen 4 along the optical axis L. In the absence of electrical stimulation, the liquid crystals arrange themselves randomly, blocking at least partly the passage of the light beam through the screen 4, the light rays being deflected by the liquid crystals.
• the lighting device 1 comprises a control member 34 of the controllable liquid crystal screen 32 intended to change the controllable liquid crystal screen 32 from a projection state to a state diffusion and vice versa.
• the control member 34 is electrically connected to the screen 4 and is configured to emit or not an electrical stimulation.
• the control member 34 when the control member 34 electrically stimulates the controllable liquid crystal screen 32, the latter is in a projection state and the lighting light beam generated by the light module 2 can pass through the main zone 6 of the screen 4 along the optical axis L without significant disturbance.
• the control member 34 does not electrically stimulate the controllable liquid crystal screen 32, the latter is in a state of diffusion and the light beam generated by the light module is either made diffuse or blocked by the liquid crystals arranged in screen 4.
• the entire screen 4 is a controllable liquid crystal screen 32, a first portion forming the main zone 6 while a second portion forms the peripheral zone 7.
• the control member 34 is in this example configured to transmit only one or the other of the portions an electrical stimulation independently of the other portion.
• the control organ 34 generates a stimulation electric only for the first portion, the second portion of the controllable liquid crystal screen 32 remaining in a diffusion state while the first portion can be in a projection or diffusion state depending on whether it is electrically stimulated by the organ control 34.
• the light module 2 it is advantageous for the light module 2 to be able to generate a beam centered on the main zone 6 of the screen and it is important that the axis of rotation R passes through at least a point in space 18 delimited by the screen 4 and planes passing through the transition edges 67, 76 forming a junction between the main zone 6 of the screen and the peripheral zone 7.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Physics & Mathematics (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Optics & Photonics (AREA)
• Mechanical Engineering (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=82319855

Family Applications (1)

Country Status (5)

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Citations (3)

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• 2022
  • 2022-05-30 FR FR2205157A patent/FR3136041B1/fr active Active
• 2023
  • 2023-05-17 WO PCT/EP2023/063394 patent/WO2023232488A1/fr not_active Ceased
  • 2023-05-17 US US18/867,535 patent/US12624814B2/en active Active
  • 2023-05-17 EP EP23728664.6A patent/EP4532976A1/de active Pending
  • 2023-05-17 CN CN202380043152.7A patent/CN119343561A/zh active Pending

Patent Citations (3)

Non-Patent Citations (1)

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