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
  • G02B27/0101—Head-up displays characterised by optical features
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
  • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
  • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
  • B60R2001/1215—Mirror assemblies combined with other articles, e.g. clocks with information displays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
  • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
  • B60R2001/1253—Mirror assemblies combined with other articles, e.g. clocks with cameras, video cameras or video screens
• • 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
  • G02B2027/0127—Head-up displays characterised by optical features comprising devices increasing the depth of field
• • 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
  • G02B2027/0138—Head-up displays characterised by optical features comprising image capture systems, e.g. camera

Definitions

• the present invention relates to a display device for a motor vehicle. It also relates to an associated display method.
• the side and center mirrors can be replaced respectively by side cameras and a rear central camera. Said cameras acquire images of the external environment of the motor vehicle and project said images on one or more display screens arranged in the passenger compartment of the motor vehicle.
• a disadvantage of this state of the art is that depending on where the display or screens are positioned, for example at the level of the dashboard of the motor vehicle or at the level of the central rearview mirror, it is necessary to the driver to make the focal point when he passes from distant vision (for example when he looks at the external environment through the windshield of the motor vehicle) to a near vision (when he looks at the screen or screens) . This causes discomfort for the driver to drive because his eyes must focus on the one or more screens. This also increases the time the driver does not have eyes on the road.
• the invention proposes a display device for a motor vehicle according to which said display device comprises:
• an image generator adapted to display an image captured by at least one camera
• At least one opaque mirror adapted to create a virtual image from said displayed image.
• the fact of replacing the display screen with an opaque mirror makes it possible to switch from a direct vision to an indirect vision via a virtual image and thus reduce the problem of focusing the eyes of the automobile driver.
• the virtual image is created from a reflection on the opaque mirror of the image displayed by the image generator.
• the display device may further comprise one or more additional characteristics from the following.
• the camera is a camera located outside the motor vehicle.
• the camera is a rear camera. According to a non-limiting embodiment, the camera is a side camera. According to a non-limiting embodiment, the camera is a camera located inside the motor vehicle.
• the mirror is positioned in the center and at the top of the windshield of the motor vehicle.
• said display device further comprises at least one intermediate opaque mirror.
• an opaque mirror is a magnifying mirror.
• the image generator is located at a distance d1 from the opaque mirror and the distance d1 is between 10 cm and 50 cm.
• the image generator is located at a distance from the intermediate opaque mirror of between 10 cm and 80 cm. It is also proposed a display method for a motor vehicle according to which said display method comprises:
• the display by an image generator of an image captured by at least one camera;
• FIG. 1 represents a motor vehicle comprising a display device according to a first nonlimiting embodiment of the invention, said display device comprising an opaque mirror and an image generator;
• FIG. 2 shows a windshield of a motor vehicle at which is disposed an opaque mirror of the display device of Figure 1;
• FIG. 3 represents a diagram of the display device for a motor vehicle, according to a second nonlimiting embodiment of the invention.
• FIG. 4 represents a diagram of an image captured by the image generator and a virtual image created by the opaque mirror of the display device of FIG. 1, according to one nonlimiting embodiment
• FIG. 5 represents a flowchart of a display method implemented by the display device of FIG. 1 or FIG.
• a motor vehicle 1 comprises at least one camera 13 and a display device 10.
• the camera 13 is a rear camera.
• the motor vehicle 1 also includes two side cameras 13 instead of side mirrors.
• a camera 13 is a camera located outside the motor vehicle 1.
• the camera captures images of the external environment to the motor vehicle.
• the rear and side cameras 13 are located outside the motor vehicle 1.
• a camera 13 is a camera located inside the motor vehicle 1.
• the camera 13 captures images of the passenger compartment of the motor vehicle 1.
• the inner camera will be able to capture images for example at the rear of the passenger compartment.
• a driver can observe through an opaque viewing mirror (described below) people sitting on the rear seats. This allows for example an adult driving to control children sitting in the back of the vehicle without having to turn around.
• the first embodiment and the second embodiment can be combined.
• the motor vehicle 1 comprises two external side cameras, an outer rear camera and an inner camera.
• the display device 10 comprises:
• an image generator 12 (called in English “picture generation unit”).
• the display device 10 is disposed in a region of the motor vehicle called the dome 1 6 which is located at the ceiling of the passenger compartment of the motor vehicle and which classically includes the command of interior lights, roof if it's opening, etc.
• the display device 10 is placed lower, at the dashboard.
• the display device 10 comprises a single opaque mirror 1 1.
• the image generator 12 is disposed at a distance d1 from the opaque mirror 11.
• the distance d1 is between 10 and 50 centimeters (cm) for a system with a single mirror and could reach 80 cm with a second intermediate mirror 14 (described below).
• the image generator 12 uses a technology such as TFT ("Thin Film Transistor"), laser scan, DLP ("Digital Light Processing"), or Lcos (Liquid Crystal on Silicon ").
• the image generator 12 is adapted to receive video images by the camera (s) 13, to format the video images of the camera into appropriate display images, and to display them on a screen, in a non-limiting example a TFT type screen.
• the image generator 12 includes a computer that allows this image processing.
• the opaque mirror 1 1 creates a virtual image Iv from the image displayed by the image generator 12.
• the virtual image Iv is created from a reflection on the opaque mirror 1 1 of the displayed image. IV by the image generator 12.
• the opaque mirror 1 1 thus has the function of projecting a virtual image 12 which is the reflection on said opaque mirror 11 of the image displayed on the screen of the image generator 12 .
• a virtual image Iv is thus obtained which lies beyond the plane of the opaque mirror 11 as illustrated in FIG.
• the virtual image lv produced by the opaque mirror 1 1 corresponds to the external environment at the rear of the motor vehicle 1.
• the opaque mirror 11 is thus a visualization mirror for the driver of the motor vehicle 1.
• the rear camera 13 associated with the opaque mirror 1 1 thus makes it possible to replace the central rearview mirror of the motor vehicle 1.
• the opaque mirror 11 is positioned at the place where the central rearview mirror, namely at the center and at the top of the windshield 15 of the motor vehicle 1, is generally located. .
• the opaque mirror 1 1 is located substantially at 50cm from the driver's head.
• the virtual image LV is therefore located substantially at a distance from the eyes (referenced 2) of the driver which is much greater than 50 cm and thus be located in the intermediate vision zone (beyond 70 cm).
• the opaque mirror 11 is positioned at the center and bottom of the windshield 15.
• the rear camera 13 is located at the top of the tailgate of the motor vehicle 1, namely at the top of the rear window of the motor vehicle 1.
• the motor vehicle 1 comprises a rear camera and two side cameras that replace the outside mirrors.
• the virtual image IV may comprise three zones respectively displaying the images captured by the two lateral cameras 13 and the images captured by the rear camera 13.
• an actuator such as in a non-limiting example a button, is used to alternately display on the opaque mirror 1 1 the images captured by the two side cameras 13 and then that captured by the rear camera 13.
• an opaque mirror 1 1 can bring depth to the projected image Iv.
• the effort of accommodation of the eyes of the driver is reduced when the driver alternately looks at the road at infinity and the virtual image Iv in the opaque mirror 1 1.
• a fast focusing is usually done when an image is at least 70 cm (intermediate vision) of the eyes of the driver.
• the opaque mirror 1 1 is substantially at 50 cm (near vision) of the head and therefore the eyes of the driver, the focusing is done quickly since the virtual image Iv projected is at more than 70cm.
• the opaque mirror 11 is oriented towards the driver's head so that the driver can easily look at the virtual image Iv.
• the optical path of the reflection on the opaque mirror 11 of the rays emitted by the image generator 12 to display the image is defined by the distance d1 seen previously.
• the opaque mirror 11 is a plane mirror.
• the virtual image is at the distance d1 from the plane of the opaque mirror 11.
• the opaque mirror 11 is a magnifying mirror. This makes it possible to form a virtual image Iv larger than the size of the image transmitted by the image generator 12.
• the mirror comprises a curvature.
• the virtual image Iv is at a distance greater than the distance d1 seen previously.
• the display device 10 further comprises at least one intermediate opaque mirror 14. This allows to fold the optical path so as to obtain a dome 1 6 compact.
• the optical path is defined by the distance d1 (between the image generator 12 and the intermediate opaque mirror 14) plus the distance d2 (between the opaque intermediate mirror 14 and the opaque mirror 11).
• the distance d2 is between 5 cm and 40 cm.
• the distance to which the virtual image Iv is located with respect to the plane of the opaque mirror 11 is equal to d1 + d2.
• the intermediate opaque mirror 14 is a magnifying mirror.
• the magnifying mirror has a curvature.
• the opaque magnifying mirror 1 1 and the magnifying opaque mirror 14 can be individually or in combination.
• the display device 10 makes it possible to implement the MTH display method for a motor vehicle 1 illustrated in FIG.
• the MTH display method comprises:
• an image generator 12 of an image captured by at least one camera 13 illustrated step DISP (12, 1c, 13)
• the creation of the virtual image Iv from said displayed image can be done by means of the opaque mirror 11 and at least one intermediate opaque mirror 14.
• the opaque mirror 11 can be replaced by a lens or any other device making it possible to give an impression of depth to the virtual image created by the opaque mirror 11.
• the virtual image Iv comprises only part of the image captured by the camera 13 and not all of the information of said image le. Part of the information acquired by the camera is thus truncated and not displayed or further diminished in terms of size to be displayed.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Mechanical Engineering (AREA)
• Closed-Circuit Television Systems (AREA)
• Instrument Panels (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
• Studio Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=53366195

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (12)

• 2015
  • 2015-04-24 FR FR1553725A patent/FR3035519B1/fr active Active
• 2016
  • 2016-04-25 JP JP2017555471A patent/JP2018514168A/ja active Pending
  • 2016-04-25 WO PCT/EP2016/059210 patent/WO2016170191A1/fr unknown
  • 2016-04-25 EP EP16722549.9A patent/EP3286597A1/de not_active Withdrawn

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