Display device for motor vehicle

Abstract

The invention relates to a display device (20) for a motor vehicle, the display device generates holographic images and 3D images. The display device comprises a light-emitting screen (32) configured to emit a projected image; a window (36) inclined relative to the light-emitting screen (32) and comprising a first face (80), a second face (82) opposite the first face, the first face reflects the projected image by creating a virtual image of the light-emitting screen (32). The display device (20) comprises a movable sheet (38) facing the second face of the window (36); and movement means (42) which are configured to move the movable sheet (38) between at least a first position at a first spacing (44) from the window (36) and a second position at a second spacing from the window (36). Figure to be published with the abstract: Figure 3

Description

Title of the invention: Display device for a motor vehicle

[0001] The invention relates to display devices for motor vehicles. The invention relates to a display device with a semi-reflective window for a motor vehicle. The invention also relates to a motor vehicle. The invention also relates to a method for controlling a display device.

[0002] Instrument clusters for the dashboard of recent motor vehicles have become fully digital clusters, particularly in high-end versions but increasingly in mid-range versions. These clusters all comprise at least one optical rendering unit, for example, a digital screen with a display surface for displaying image data, which is arranged vertically while facing the user, namely the driver.

[0003] We are also beginning to see the emergence of multi-plane digital screen concepts with the addition of a virtual image in front of the main image in order to highlight certain information. This virtual image is created by adding a second digital screen, or secondary digital screen, as opposed to the primary digital screen which displays the main image. The secondary screen can be arranged horizontally and the image displayed on said secondary digital screen, or secondary image, is then reflected in a semi-reflecting plate and “floats” in front of the main image displayed by the primary digital screen.

[0004] A simplified variant of this concept consists of having a virtual image, which is reflected in a display area located in the field of vision of the driver of the vehicle, from an image displayed on a digital screen arranged outside the display area and which is reflected in a semi-reflecting blade. In this variant, the instrument cluster has the advantage of comprising only a single digital screen instead of two. It is therefore less expensive to produce and maintain in service.

[0005] Finally, the continuing trend towards increasing the richness of information display is leading to the exploration of three-dimensional display means, in order to display particular information with a "3D effect". Improving the visual quality as well as the distinctiveness and diversity of the elements thus displayed with a 3D effect can improve the driving experience and safety for the driver of the motor vehicle.

[0006] Document FR3091931A1 presents a motor vehicle equipped with a display device. This display device comprises an autostereoscopic screen adapted for rendering at least one 3D image and a micromirror blade. The micromirror blade micromirrors is inclined at a determined angle relative to the auto stereoscopic screen so as to project the at least one 3D image into an image plane formed in front of the micromirror plate relative to a given point of view.

[0007] Such a display device improves the visual rendering since the image obtained in the image plane is a real 3D image floating in the air in front of the micromirror blade according to the given point of view. However, there is a need to modulate the 3D effect of the image observed by a passenger.

[0008] The invention aims to address at least one of the problems or drawbacks encountered in the prior art. In particular, the invention aims to modulate the appearance of an image of a display device. The invention also aims to optimize the compactness, security, and capacity of a display device to generate images with different aspects from the same projected image.

[0009] According to a first aspect, the invention proposes a display device for a motor vehicle, the display device comprising a light-emitting screen configured to emit a projected image; a window inclined relative to the light-emitting screen and comprising a first face, a second face opposite the first face, the window being capable of at least partially reflecting the projected image by creating a virtual image of the light-emitting screen; remarkable in that the display device comprises a movable sheet facing the second face of the window; and movement means which are configured to move the movable sheet between at least a first position at a first spacing from the window and a second position at a second spacing from the window.

[0010] The invention provides movement means which make it possible to change the position and / or configuration of the moving sheet on which the projected image is emitted. Consequently, the image perceived by a user takes on different configurations depending on the position of the reception zone. The invention extends the possibilities offered by a display device.

[0011] Document US8596802B2 proposes a solution for adjusting the curvature and focal length of an adjustable reflector which is turned towards an energy receiver. However, it does not provide any solution in the field of motor vehicles.

[0012] Preferably, the displacement means comprise means for curving the movable sheet, said curving means being configured to modify a radius of curvature of the movable sheet.

[0013] Preferably, the movable sheet comprises two side edges which are configured to curve in the second position.

[0014] Preferably, the movable sheet comprises a first edge and a second edge opposite the first edge, the glass being between the first edge and the second edge, the moving means comprising a slide guiding said second edge.

[0015] Preferably, the movable sheet comprises a first edge and a second edge opposite the first edge, the movement means comprising a slide guiding said second edge.

[0016] Preferably, the movement means comprise a fixed support, the first edge being fixed at the level of the fixed support.

[0017] Preferably, the light emission screen has a main emission direction; in the first position, along the main emission direction, the movable sheet comprises two lateral portions with a first bending stiffness, a central portion between the lateral portions and having a second bending stiffness which is less than the first bending stiffness.

[0018] Preferably, the moving means comprise an articulated arm with a hinge, a rotating motor configured to retract the articulated arm; the articulated arm comprising a first segment connected to the rotating motor, and a second segment connected to the first segment via the hinge.

[0019] Preferably, the movement means comprise a profile, the movable sheet being fixed to said profile.

[0020] Preferably, the profile comprises a groove receiving the movable sheet.

[0021] Preferably, the movable sheet fits the window in the first position.

[0022] Preferably, the display device further comprises an auxiliary light source arranged between the glass and the movable sheet.

[0023] Preferably, the first spacing is less than or equal to 2 cm, and the second spacing is between 3 cm and 10 cm.

[0024] Preferably, the mobile sheet is opaque and the glass is transparent.

[0025] Preferably, the movable sheet comprises a plastic material and the glass includes glass or polymethyl methacrylate.

[0026] Preferably, the displacement means comprise a telescopic link connected to the movable sheet and configured to retract into the second position.

[0027] Preferably, the displacement means comprise means for deforming the movable sheet.

[0028] Preferably, the movable sheet is opposite the screen relative to the glass.

[0029] Preferably, the projected image is a projected luminous image.

[0030] Preferably, the light emission screen is a display screen.

[0031] Preferably, the movable sheet comprises a variable thickness along the main emission direction.

[0032] Preferably, the glass is thicker than the movable sheet.

[0033] Preferably, the first edge and the second edge are parallel.

[0034] Preferably, the display device is a holo- display device. chart.

[0035] According to another aspect, the invention relates to a display device for a motor vehicle, the display device comprising a display screen configured to emit a light image in a main direction; a window facing the display screen and inclined relative to said display screen in order to deflect a light image reflected relative to the display screen; remarkable in that the display device comprises a movable sheet opposite the screen relative to the window, said movable sheet comprising a face exposed towards the window, and a face opposite the exposed face; and means for curving the movable sheet in order to modulate a curvature of the exposed face so as to modulate a spacing between said exposed face and the display screen. Thus, the exposed face is perceptible to different degrees, depending on its proximity to the window. The perceived quality is optimized.

[0036] According to another aspect, the invention proposes a dashboard comprising a display device; remarkable in that the display device is in accordance with the invention.

[0037] According to another aspect, the invention provides a motor vehicle comprising a passenger compartment with a dashboard, the dashboard comprising a display device; remarkable in that the display device is in accordance with the invention.

[0038] Preferably, the light emission screen is above the window.

[0039] According to another aspect, the invention provides a motor vehicle comprising a dashboard; remarkable in that the dashboard is in accordance with the invention.

[0040] According to another aspect, the invention proposes a method for controlling a motor vehicle display device; remarkable in that the display device is in accordance with the invention, and in that the control method comprises a step c) moving the movable sheet from the first position to the second position.

[0041] Preferably, before step c) movement, the control method comprises the steps a) putting the display device on standby, the movable sheet being in the first position; b) projecting an image projected onto the glass by the light-emitting screen. Each characteristic introduced by the expression “preferably” given in relation to one of the aspects of the invention applies to all the other aspects of the invention.

[0042] The invention will be well understood and other aspects and advantages will appear clearly on reading the description which follows, given with reference to the figures appended and listed below.

[0043] [Fig.l] is a side view of a motor vehicle according to the invention.

[0044] [Fig.2] is an isometric view of a dashboard of a motor vehicle according to the invention.

[0045] [Fig. 3] represents a motor vehicle display device according to the invention in a first configuration.

[0046] [Fig. 4] represents the motor vehicle display device according to the invention in a second configuration.

[0047] [Fig.5] shows a diagram of a method for controlling a motor vehicle display device according to the invention.

[0048] In the following description, the term "comprise" is synonymous with "include" and is not limiting in that it allows the presence of other steps in the method; or other elements in the motor vehicle, or in the display device to which it relates. It is understood that the term "comprise" includes the terms "consist of". The terms "external" and "internal" will designate respectively that which is oriented towards the outside of the vehicle and towards the inside of the motor vehicle.

[0049] In the present description, the term “longitudinal”, the term “longitudinally”, the term “transverse”, and the term “transversely” are used according to the reference frame of the vehicle, in the mounting configuration. The term “longitudinal” corresponds to the main direction of movement of the vehicle. The term “transverse” corresponds to a direction perpendicular to the main direction of movement of the vehicle. The term “front” refers to the main direction of movement of the vehicle. The term “rear” designates the opposite of the front of the vehicle.

[0050] The X axis represents the longitudinal direction, the Y axis represents the transverse direction, and the Z axis represents the vertical direction of the motor vehicle. These three axes define a direct trihedron whose orientation is preserved throughout the figures.

[0051] In the present description, the ranges of values ​​include the limits which delimit them.

[0052] In the present description, the term "vertical" and the term "horizontal" are not to be understood in the strict sense of the term. Indeed, they allow an inclination of at most 20°, preferably at most 10°, more preferably at most 5°, even more preferably at most 2°; compared to the strict sense of these terms.

[0053] In this description, the technical characteristics are defined in the mounting configuration of the display device, unless explicitly stated otherwise.

[0054] Throughout the description, the different figures use the same reference signs to designate identical or similar entities.

[0055] [Fig.l] represents a motor vehicle 10 according to the invention. The motor vehicle 10 comprises energy storage means and at least one motor (not shown) adapted to drive said motor vehicle 10.

[0056] The motor vehicle 10 comprises a structure 12. The structure 12 forms an outer body, or even a main frame of the motor vehicle. The structure 12 delimits different compartments of the motor vehicle 10, including the passenger compartment 14, the cargo compartment, the engine compartment (not shown). The structure 12 connects different parts of the motor vehicle 10 including the openings. The structure 12 forms a mounting support for the powertrain, the suspension systems, the steering system, the braking systems.

[0057] The structure 12 may be formed from an assembly of stamped sheets welded to each other. The structure 12 includes a crossmember 16. The crossmember 16 forms a transverse beam crossing the passenger compartment 14. The passenger compartment 14 is delimited by a dashboard 18. The dashboard 18 is in front of the passenger compartment 14. It extends transversely over the entire width of the passenger compartment 14. The dashboard 18, also called the dashboard, is fixed to the structure 12; more precisely to the crossmember 16 which it covers.

[0058] The dashboard 18 houses at least one display device 20. The display device 20 is configured to display an image visible to a user present in the passenger compartment 14. The display device 20 emits light rays propagating in the passenger compartment 14.

[0059] The motor vehicle may, for example, be a private motor vehicle or a utility motor vehicle.

[0060] [Fig.2] shows a dashboard 18 of a motor vehicle. The motor vehicle corresponds to that shown in relation to [Fig.l].

[0061] The dashboard 18 accommodates various components; including vents 22, human-machine interfaces, generally designated by the acronym “HMI”. The steering wheel 24 is behind the dashboard 18. According to an alternative of the invention, the steering wheel 24 is on the right in the passenger compartment 14.

[0062] The dashboard 18 is equipped with several display devices 20 distributed transversely. The display devices 20 are integrated into a display system including computer means. The computer means 26 comprise a memory 28 and a processor 30, also called a computer. The computer means 26 may comprise a graphics card. The computer means 26 may be an on-board computer of the motor vehicle. The computer means 26 communicate with each display device 20 in order to control its content.

[0063] The images emitted by each display device 20 include safety-related information. They provide driving assistance. Each display device 20 is also capable of displaying entertainment content. They advantageously include images with a floating effect for a passenger. These images are also referred to as “3D images.” Each display device 20 is optionally configured to generate a holographic image. Such images are more visible to a passenger, and in particular to the driver. This increases safety when the images include driving-related information.

[0064] According to one embodiment of the invention, the dashboard 18 has a display device 20 extending transversely over the entire width of the passenger compartment 14 and / or the entire width of the dashboard 18.

[0065] [Fig. 3] shows a display device 20 for a motor vehicle. The display device 20 is in a first configuration. The motor vehicle may correspond to that shown in relation to one of FIGS. 1 to 2. The dashboard is not shown for the sake of clarity. The position of the passenger compartment 14 is indicated as a reference.

[0066] The display device 20 comprises a light-emitting screen 32 configured to emit a projected image, or source image. More specifically, the light-emitting screen 32 emits light rays 34 forming the projected image. The light rays 34 are intended to propagate towards the passenger compartment 14. Generally, the light-emitting screen is a first screen, or even a source screen. The light-emitting screen 32 is for example a light-emitting diode screen. The light-emitting screen 32 may be an organic light-emitting diode screen, generally designated by the English acronym “OLED”. The light-emitting screen 32 emits the projected image in the form of a mesh of pixels.

[0067] In the present embodiment, the light emission screen 32 is arranged horizontally in order to conceal it from the view of a passenger. It is optionally arranged in a housing in the dashboard, and is covered by a cap for the sake of discretion; and therefore perceived quality.

[0068] The display device 20 comprises a window 36 facing the light-emitting screen 32. The window 36 is also referred to as a lens or blade. The window 36 is transparent, or substantially tinted. It is generally a translucent wall. For example, the window 36 comprises glass or polymethyl methacrylate. Other translucent materials are envisaged.

[0069] The window 36 is inclined relative to the light emission screen 32 so as to reflect all or part of the projected image. The window 36 at least partially reflects the projected image by creating a virtual image of the light emission screen 32. The virtual image appears on a virtual plane 86. The virtual plane 86 is symmetrical to the light emission screen 32 relative to the first face 80 of the window 36. Thus, an occupant perceives in his field of vision a virtual image appearing in front of the window 36, hence a sensation of depth. The projected image in its reflected form bypasses the light emission screen 32 thanks to the angular deviation imposed by the inclination of the window 36. The window 36 has a first face 80 and a second face 82, opposite the first face according to the thickness of the window 36. The window 36 forms a plate. The first face 80 is smooth. It is capable of reflecting, at least partially, the projected image; or more generally any light ray 34 incident from the light emission screen 32.

[0070] The window 36 partially reflects, in terms of light intensity, the light rays 34. It returns them at a distance from the light emission screen 32. It is semi-reflective. For example, the first face 80 is capable of reflecting at least 30% of the light intensity of a light ray 34 with an angle of incidence of 45°. Preferably, the first face 80 is capable of reflecting from 30% to 70% of the light intensity of a light ray 34 with an angle of incidence of 45°. Said light ray 34 comprises a wavelength included in the visible range, that is to say having a wavelength between 380 nm and 780 nm.

[0071] The display device 20 comprises a movable sheet 38 facing the window 36. The movable sheet 38 is movable in the frame of reference of the display device 20. The window 36 is between the movable sheet 38 and the light-emitting screen 32. The movable sheet 38 is optionally opaque. The movable sheet 38 is opposite the second face 82. In the present configuration, the movable sheet 38 matches and / or is parallel to the second face 82. It optionally has a pattern or a covering on the side of the window 36. The window 36 being transparent, the movable sheet 38 is visible through the window 36. Thus, the covering of the movable sheet 38 is perceptible through the window 36 by an occupant of the motor vehicle; which improves the perceived quality.

[0072] Generally, the movable sheet 38 also forms a second screen. According to an alternative of the invention, the movable sheet is translucent and tinted.

[0073] The display device 20 also comprises movement means 42 capable of moving the movable sheet 38. The movement means 42 are configured to move the movable sheet 38 between at least a first position at a first spacing 44 from the glass 36 and a second position (not shown) at a second spacing from the glass 36. Each spacing is measured perpendicular to the glass 36, from the second face 82. The movement means 42 are configured to move the movable sheet 38 so as to move at least a portion of the movable sheet 38, or the entire movable sheet 38. The first spacing and the second spacing may be average spacings.

[0074] More generally, the movable sheet 38 may have a first configuration and a second configuration respectively. In the first position, the movable sheet 38 fits the window 36. The first spacing 44 is less than or equal to 2 cm.

[0075] According to one embodiment, the movement means 42 are configured to move the movable sheet 38 while maintaining its flatness by translating and / or pivoting it.

[0076] Thus, the movable sheet 38 can follow different configurations, and it can occupy different depths relative to the window 36. Therefore, a user can observe the movable sheet 38 at different positions, and therefore at different distances. When the movable sheet 38 moves towards its second position, it gradually disappears. This visual result is obtained whether the light-emitting screen 32 is on or off. Indeed, the window 36 reflects the light rays, and reduces the proportion of those likely to reach the movable sheet 38.

[0077] The displacement means 42 may comprise an actuator and a slide oriented vertically or longitudinally. The actuator may comprise a cylinder.

[0078] According to one option of the invention, the displacement means comprise means for deforming the movable sheet, for example for stretching and tilting the movable sheet.

[0079] The displacement means 42 comprise means 46 for curving the movable sheet 38. The curving means 46 are configured to modify a radius of curvature of the movable sheet 38, for example in its middle. In the first position, and therefore in the first configuration, the movable sheet 38 is generally flat. Facing the window 36, it curves progressively until it reaches the second position. The curving means 46 are capable of deforming the movable sheet 38.

[0080] The movable sheet 38 comprises two side edges 48 extending vertically and longitudinally. The side edges 48 are transversely opposed. The side edges 48 are configured to curve in the second position.

[0081] The movable sheet 38 comprises a first edge 50 and a second edge 52 opposite the first edge 50. The first edge 50 and the second edge 52 are parallel, they extend transversely. The window 36 extends between the first edge 50 and the second edge 52. The displacement means 42 comprise a slide 54 guiding the second edge 52. The slide 54 is parallel to the window 36. The use of a slide 54 offers a compact solution.

[0082] The moving means 42 comprise a fixed support 56. The fixed support 56 may be connected to the structure of the motor vehicle. The first edge 50 is fixed at the fixed support 56. The combination of the slide 54 and the fixed support 56 optimizes the control of the curvature of the movable sheet 38 and the simplicity of the display device 20.

[0083] The movement means 42 comprise an articulated arm 58 with a hinge 60. The movement means 42 further comprise a rotating motor 62 configured to retract and deploy the articulated arm 58, and to modify its position by relative to the window 36. Generally, the rotating motor 62 forms an actuator. The articulated arm 58 comprises a first segment 64 connected to the rotating motor 62, and a second segment 66 connected to the first segment 64 via the hinge 60. The second segment 66 is connected to the slide 54. This arrangement makes it possible to form the curving means 46. This solution optimizes the amplitude of deformation and the compactness.

[0084] The displacement means 42 comprise a profile 68. The movable sheet 38 is fixed to said profile 68. The profile 68 comprises a groove receiving an edge of the movable sheet 38, for example the second edge 52. The groove is open towards the window 36. The displacement means 42 comprise a telescopic connection 70 connected to the movable sheet 38 and to the articulated arm 58. The profile 68 is connected to the telescopic connection 70. The telescopic connection 70 is at the level of the second edge 52.

[0085] The display device 20 further comprises a light source called an auxiliary light source 84. The auxiliary light source 84 is arranged between the movable sheet 38 and the glass 36. It is on the side of the second face 82. It comprises for example a light-emitting diode, or a row of such diodes. When it is lit, it illuminates the movable sheet 38, which increases its visibility through the glass 36. Its power supply state may be the opposite of that of the light-emitting screen 32. Preferably, the auxiliary light source 84 is capable of illuminating the movable sheet 38 in the first position and in the second position.

[0086] According to one embodiment, when the light-emitting screen 32 lights up, the auxiliary light source 84 gradually turns off. Thus, the view of the moving sheet 38 is gradually replaced by the projected image; which increases the enjoyment and therefore the perceived quality.

[0087] [Fig. 4] shows a display device 20 for a motor vehicle. The motor vehicle may correspond to that shown in relation to one of FIGS. 1 to 3. The display device 20 is in a second configuration. The position of the passenger compartment 14 is indicated as a reference. One of the light rays 34 from the light-emitting screen 32 is deflected by the window 36. An occupant of the motor vehicle views a fictitious image (not shown) in front of the display device 20.

[0088] In order to reach the second position, the rotating motor 62 is supplied with energy so as to flex the articulated arm 58. The second edge 52 has moved closer to the first edge 50. The profile 68 has moved in the slide 54. The movable sheet 38 has curved. It has become concave. It has moved away from the window 36.

[0089] According to one option, the telescopic link 70 is configured to retract during the transition to the second position. It then enters the articulated arm 58. The telescopic link 70 is retractable into the movement means 42. It may comprise a jack.

[0090] Following the supply of the displacement means 42, in the second configuration of the display device 20 and the movable sheet 38, the latter is at a second spacing 72 from the window 36. The second spacing 72 is between 3 cm and 10 cm, preferably between 4 cm and 8 cm. Its inclination varies in different places.

[0091] The light emission screen 32 has a main emission direction 74. In the first position and / or in the second position, along the main emission direction 74, the movable sheet 38 comprises two lateral portions 76 with a first bending stiffness, a central portion 78 between the lateral portions 76 and having a second bending stiffness. The second bending stiffness is less than the first bending stiffness. Each bending stiffness can be measured according to a three-point bending test. A test piece is held at two points or two parallel lines, and a deformation is imposed by applying a force between said two points. Said force is the bending stiffness. The lateral portions 76 are stiffer than the central portion 78. The latter concentrates the deformations when the movable sheet 38 is arched.For example, each of the portions extends over at least a quarter, preferably a third of the movable sheet 38. .

[0092] According to one embodiment of the invention, the movable sheet 38 comprises a variable thickness along the main emission direction 74. Optionally, the movable sheet comprises a series of flexural grooves; said flexural grooves having different densities between the central portion 78 and the lateral portions 76. These solutions make it possible to vary the flexural stiffnesses of these portions.

[0093] It is noteworthy that in second position, the central portion 78 is further away from the window 36 than are the lateral portions 76. Thus, the lateral portions 76 are more visible through the window than is the central portion 78. This feature makes it possible to modulate the visibility of the movable sheet 38 according to its height. Furthermore, when the movable sheet 38 deforms, the progressive disappearance of the central portion 78 accompanied by a persistence of the lateral portions 76 makes it possible to add a specific visual effect. This further increases the perceived quality.

[0094] Generally, the movable sheet 38 is opposite the light emission screen 32 relative to the glass 36. Preferably, the movable sheet 38 faces the light emission screen 32 through the glass 36. Furthermore, the projected image is a projected light image. In the present embodiment, the glass 36 is thicker than the movable sheet 38.

[0095] According to an alternative of the invention, the rotating motor is in the hinge.

[0096] According to a preferred embodiment, the movable sheet is made of a plastic or composite material. The plastic material may comprise a thermoplastic material or a thermosetting material. According to a preferred embodiment, the plastic material is selected from the group consisting of polypropylene, polyamide, polyphthalamide, polyetheretherketone, polyphenylene sulfide, polyamide-imide, polyetherimide, polyarylamide, polyepoxide, unsaturated polyester, vinylester or polyester-vinylester resins. For example, the composite material comprises a matrix of a plastic material as described above with a reinforcement. For example, the reinforcement comprises glass or carbon fibers. The movable sheet 38 may comprise a coating. It may be tinted white to increase the visibility of the projected image. Other colors may be selected. The movable sheet may also be made of any material suitable for decorative coating (wood, textile, leather, etc.)

[0097] The movable sheet comprises at least 10% by weight of recycled plastic material based on the total weight of the plastic material; preferably from 10 to 80% by weight; more preferably from 20 to 60% by weight or from 30 to 40% by weight. The use of recycled plastic material reduces the ecological footprint of the vehicle.

[0098] [Fig. 5] shows a diagram of a method for controlling a motor vehicle display device. The motor vehicle may correspond to that shown in relation to one of Figures 1 to 4. The control method may be a method for switching on a motor vehicle display device.

[0099] The method comprises the following steps, in particular executed in the following order.

[0100] a) putting the display device into standby 100, the movable sheet being in the first position;

[0101] b) projection 102 of an image projected onto the glass by the light emission screen;

[0102] c) movement 104 of the movable sheet from the first position to the second position; and optionally:

[0103] d) power supply 106 of the auxiliary light source.

[0104] In step a) standby 100, the mobile sheet is static in the reference frame of the display device. Step a) standby 100 may include waiting for an activation signal from the display device. The mobile sheet is visible to the driver since it is close to the window.

[0105] In step b) projection 102, the screen receives a control signal comprising information in order to emit the projected image. The projected image can be animated.

[0106] In step c) movement 104, the movement means are actuated. For example, they impose a mechanical deformation on the movable sheet. The articulated arm folds. The telescopic connection contracts.

[0107] The control method may comprise a delay between step b) projection 102 and step c) displacement 104. According to an alternative, these steps start at the same time.

[0108] Thus, the control method makes it possible to combine two display modes: a passive mode without power supply to the screen, a mode in which the moving sheet is visible through the glass; and an active mode promoting the perception of the projected image since the moving sheet disappears as it moves back into second position. Thus, the invention optimizes the perceived quality and safety to the extent that the visibility of the information on the light-emitting screen is improved.

[0109] The method may comprise a step e) stopping 108 of the movable sheet in the second position.

[0110] Step d) feeding 106 makes it possible to illuminate a portion of the moving sheet. It can be carried out during step c) movement 104. This increases the perception of the movement of the moving sheet; and therefore the perceived quality. Step d) feeding 106 can be interrupted at step e) stopping 108, while step b) projection 102 continues.

[0111] According to an alternative or an option of the invention, step d) feeding 106 is carried out before step b) projection 102, and stops at the start of the latter.

[0112] Other sequences of these steps are contemplated by the invention.

[0113] The invention comprises the combination of all the embodiments illustrated by all figures.

Claims

Claims

1. A display device (20) for a motor vehicle (10), the display device (20) comprising a light-emitting screen (32) configured to emit a projected image; a window (36) inclined relative to the light-emitting screen (32) and comprising a first face (80), a second face (82) opposite the first face (80), the window (36) being capable of at least partially reflecting the projected image by creating a virtual image of the light-emitting screen (32); characterized in that the display device (20) comprises a movable sheet (38) facing the second face (82) of the window (36); and displacement means (42) which are configured to move the movable sheet (38) between at least a first position at a first spacing (44) from the window (36) and a second position at a second spacing (72) from the window (36).

2. Display device (20) according to claim 1, characterized in that the displacement means (42) comprise means (46) for curving the movable sheet (38), said curving means (46) being configured to modify a radius of curvature of the movable sheet (38); preferably, the movable sheet (38) comprises two lateral edges (48) which are configured to curve in the second position.

3. Display device (20) according to one of claims 1 to 2, characterized in that the movable sheet (38) comprises a first edge (50) and a second edge (52) opposite the first edge (50), the glass (36) being between the first edge (50) and the second edge (52), the displacement means (42) comprising a slide (54) guiding said second edge (52); preferably, the displacement means (42) comprising a fixed support (56), the first edge (50) being fixed at the level of the fixed support (56).

4. Display device (20) according to one of claims 1 to 3, characterized in that the light emission screen (32) has a main emission direction (74); in the first position, along the main emission direction, the movable sheet (38) comprises two lateral portions (76) with a first bending stiffness, a central portion (78) between the lateral portions (76) and having a second bending stiffness which is less than the first bending stiffness.

5. Display device (20) according to one of claims 1 to 4, characterized in that the displacement means (42) comprise an articulated arm (58) with a hinge (60), a rotating motor (62) configured to retract the articulated arm (58); the articulated arm (58) comprising a first segment (64) connected to the rotating motor (62), and a second segment (66) connected to the first segment via the hinge (60).

6. Display device (20) according to one of claims 1 to 5, characterized in that the displacement means (42) comprise a profile (68), the movable sheet (38) being fixed to said profile (68); preferably the profile (68) comprises a groove receiving the movable sheet (38).

7. Display device (20) according to one of claims 1 to 6, characterized in that the display device (20) further comprises an auxiliary light source (84) arranged between the glass and the movable sheet; preferably, the first spacing (44) is less than or equal to 2 cm, and the second spacing (72) is between 3 cm and 10

8. cm. Display device (20) according to one of claims 1 to 7, characterized in that the displacement means (42) comprise a telescopic link (70) connected to the movable sheet (38) and configured to retract into the second position.

9. Motor vehicle (10) comprising a passenger compartment (14) with a dashboard, the dashboard comprising a display device (20); characterized in that the display device (20) is in accordance with one of claims 1 to 8; preferably, the light emission screen (32) is above the window (36).

10. Method for controlling a display device (20) of a motor vehicle (10); characterized in that the display device (20) is in accordance with one of claims 1 to 8, and in that the control method comprises a step c) moving (104) the movable sheet from the first position to the second position; preferably, before step c) moving (104), the control method comprises the steps a) putting the display device (20) into standby (100), the movable sheet being in the first position; b) projecting (102) an image projected onto the window by the light-emitting screen (32).

Images