Automotive display device

Abstract

The invention relates to a display device (20) for a motor vehicle. The display device generates holographic 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) and a second face (82) opposite the first face. The first face reflects the projected image, creating a virtual image of the light-emitting screen (32). The display device (20) includes a movable sheet (38) facing the second face of the window (36); and movement means (42) configured to move the movable sheet (38) between at least a first position at a first distance (44) from the window (36) and a second position at a second distance from the window (36). Figure to be published with the abbreviation: Figure 3

Description

Title of the invention: Display device for motor vehicles

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

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

[0003] Concepts of multi-plane digital displays with the addition of a virtual image in front of the main image to highlight certain information are also beginning to emerge. This virtual image is created by adding a second digital display, or secondary digital display, as opposed to the primary digital display that shows the main image. The secondary display can be positioned horizontally, and the image displayed on it is then reflected in a semi-reflective sheet and "floats" in front of the main image displayed by the primary digital display.

[0004] A simplified variant of this concept consists of having a virtual image, which is reflected in a display area located within the driver's field of vision, from an image displayed on a digital screen arranged outside the display area and reflected in a semi-reflective 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.

[0005] Finally, the ongoing trend towards increasing the richness of information displays leads to the exploration of three-dimensional display methods, in order to display specific 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 enhance the driving experience and safety for the driver of the motor vehicle.

[0006] Document FR3091931A1 describes 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 plate. The micromirror plate The micromirrors are inclined at a determined angle relative to the auto stereoscopic screen so as to project at least one 3D image in an image plane formed in front of the micromirror plate relative to a given viewpoint.

[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 plate from the given viewpoint. 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 on a display device. The invention also aims to optimize the compactness, safety, and ability of a display device to generate images with different appearances 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 reflecting at least partially the projected image by creating a virtual image of the light-emitting screen; remarkable in that the display device comprises a movable sheet opposite the second face of the window; and means of movement which are configured to move the movable sheet between at least a first position at a first distance from the window and a second position at a second distance from the window.

[0010] The invention provides means for moving the moving sheet onto which the projected image is emitted, allowing the position and / or configuration to be changed. Consequently, the image perceived by a user takes on different configurations depending on the position of the receiving area. The invention extends the possibilities offered by a display device.

[0011] US patent 8596802B2 proposes a solution for adjusting the curvature and focal length of an adjustable reflector that is directed towards an energy receiver. However, it does not provide any solution in the field of motor vehicles.

[0012] Preferably, the movement means include means for bending the moving sheet, said bending means being configured to modify a radius of curvature of the moving sheet.

[0013] Preferably, the movable sheet comprises two lateral edges which are configured to curve into 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 means of movement 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 means of movement comprising a slide guiding said second edge.

[0016] Preferably, the means of movement comprising 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 means of movement 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 means of movement comprise a profile, the movable sheet being fixed to said profile.

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

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

[0022] Preferably, the display device further includes 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 movable 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 means of movement comprise a telescopic link connected to the movable sheet and configured to retract into the second position.

[0027] Preferably, the means of movement include means for deforming the movable sheet.

[0028] Preferably, the movable sheet is on the opposite side of the screen with respect 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 luminous image in a principal direction; a window facing the display screen and inclined relative to said display screen in order to deflect a luminous image reflected from the display screen; notable in that the display device comprises a movable sheet opposite the screen with respect to the window, said movable sheet having one face exposed towards the window, and one face opposite the exposed face; and means for curving the movable sheet in order to modulate the curvature of the exposed face so as to modulate the distance between said exposed face and the display screen. Thus, the exposed face is perceptible to varying 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 conforms to the invention.

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

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

[0039] According to another aspect, the invention proposes a motor vehicle comprising a dashboard; remarkable in that the dashboard conforms to 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 conforms to the invention, and in that the control method includes 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 into standby mode, with the moving sheet in the first position; b) projecting an image onto the glass by the light-emitting screen. Each feature introduced by the expression "preferably" given in relation to one aspect of the invention applies to all other aspects of the invention.

[0042] The invention will be well understood and other aspects and advantages will become clear upon reading the following description, given with reference to the attached figures listed below.

[0043] Fig. 1 is a side view of a motor vehicle according to the invention.

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

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

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

[0047] Figure 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 "include" is synonymous with "include" and is not limiting in that it permits the presence of other steps in the process; or other elements in the motor vehicle, or in the display device to which it relates. It is understood that the term "include" includes the terms "consist of". The terms "external" and "internal" shall respectively designate what is oriented towards the outside of the vehicle and towards the inside of the motor vehicle.

[0049] In this description, the terms "longitudinal," "longitudinally," "transverse," and "transversely" are used with respect to the vehicle's frame of reference in the mounting configuration. "Longitudinal" refers to the vehicle's principal direction of travel. "Transverse" refers to a direction perpendicular to the vehicle's principal direction of travel. "Front" refers to the vehicle's principal direction of travel. "Rear" refers to 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 right-handed trihedron whose orientation is preserved throughout the figures.

[0051] In this description, the ranges of values ​​include the bounds that delimit them.

[0052] In this description, the terms "vertical" and "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°, and even more preferably at most 2°; with respect to the strict meaning of these terms.

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

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

[0055] Figure 1 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 the main frame of the motor vehicle. The structure 12 delineates various compartments of the motor vehicle 10, including the passenger compartment 14, the cargo area, and the engine compartment (not shown). The structure 12 connects various parts of the motor vehicle 10, including the openings. The structure 12 forms a mounting support for the powertrain, suspension systems, steering system, and braking systems.

[0057] The structure 12 can be formed from an assembly of stamped and welded sheet metal. The structure 12 includes a cross member 16. The cross member 16 forms a transverse beam spanning the passenger compartment 14. The passenger compartment 14 is delimited by a dashboard 18. The dashboard 18 is located in front of the passenger compartment 14. It extends transversely across the entire width of the passenger compartment 14. The dashboard 18, also called the instrument panel, is attached to the structure 12; more precisely, to the cross member 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 into the passenger compartment 14.

[0059] The motor vehicle can, for example, be a private motor vehicle or a commercial motor vehicle.

[0060] Figure 2 shows a dashboard 18 of a motor vehicle. The motor vehicle corresponds to the one shown in relation to Figure 1.

[0061] The dashboard 18 houses various components, including air vents 22 and human-machine interfaces, generally referred to by the acronym "HMI". The steering wheel 24 is located behind the dashboard 18. According to an alternative embodiment of the invention, the steering wheel 24 is on the right-hand side of the passenger compartment 14.

[0062] The dashboard 18 is equipped with several display devices 20 arranged transversely. The display devices 20 are integrated into a display system that includes computer means. The computer means 26 include a memory 28 and a processor 30, also called a computer. The computer means 26 may include 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. Advantageously, they include images with a floating effect for a passenger. These images are also called "3D images." Each display unit is optionally configured to generate a holographic image. Such images are more visible to a passenger, and especially 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] Figure 3 shows a display device 20 of a motor vehicle. The display device 20 is in a first configuration. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 2. The dashboard is not shown for clarity. The position of the passenger compartment 14 is indicated as a reference point.

[0066] The display device 20 includes a light-emitting screen 32 configured to emit a projected image, or source image. More precisely, 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 a source screen. The light-emitting screen 32 is, for example, a light-emitting diode (LED) screen. The light-emitting screen 32 may be an organic light-emitting diode (OLED) screen. The light-emitting screen 32 emits the projected image in the form of a grid of pixels.

[0067] In this embodiment, the light-emitting screen 32 is arranged horizontally so as to conceal it from the view of a passenger. It is optionally housed in a compartment in the dashboard and covered by a visor for the sake of discretion and thus perceived quality.

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

[0069] The glass 36 is inclined relative to the light-emitting screen 32 so as to reflect all or part of the projected image. The glass 36 reflects at least part of the projected image, creating a virtual image of the light-emitting screen 32. The virtual image appears on a virtual plane 86. The virtual plane 86 is the reflection of the light-emitting screen 32 across the first face 80 of the glass 36. Thus, an occupant perceives a virtual image appearing in their field of vision. in front of the glass 36, hence a sensation of depth. The projected image, in its reflected form, deflects around the light-emitting screen 32 thanks to the angular deflection imposed by the inclination of the glass 36. The glass 36 has a first face 80 and a second face 82, opposite the first face according to the thickness of the glass 36. The glass 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 on the light-emitting screen 32.

[0070] The glass 36 partially reflects, in terms of luminous intensity, the light rays 34. It reflects them away from the light-emitting screen 32. It is semi-reflective. For example, the first face 80 is capable of reflecting at least 30% of the luminous 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 luminous intensity of a light ray 34 with an angle of incidence of 45°. Said light ray 34 has a wavelength in the visible range, that is, 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 within the frame of reference of the display device 20. The window 36 is located 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 conforms to and / or is parallel to the second face 82. It optionally has a pattern or covering on the side facing the window 36. Since the window 36 is 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 to an occupant of the motor vehicle; this improves the perceived quality.

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

[0073] The display device 20 also includes movement means 42 adapted to move 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 gap 44 from the glass 36 and a second position (not shown) at a second gap from the glass 36. Each gap 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 and second gaps can be average gaps.

[0074] More generally, the movable sheet 38 can have a first configuration and a second configuration respectively. In the first position, the movable sheet 38 fits snugly against the glass 36. The first gap 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 can occupy different depths relative to the glass 36. Consequently, a user can observe the movable sheet 38 from different positions, and therefore from different distances. As the movable sheet 38 moves to its second position, it gradually disappears. This visual effect is obtained whether the light-emitting screen 32 is on or off. Indeed, the glass 36 reflects the light rays and reduces the proportion of those likely to reach the movable sheet 38.

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

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

[0079] The movement means 42 include bending means 46 for the movable sheet 38. The bending means 46 are configured to modify a radius of curvature of the movable sheet 38, for example, at its midpoint. In the first position, and therefore in the first configuration, the movable sheet 38 is generally flat. Facing the glass 36, it gradually curves until it reaches the second position. The bending means 46 are capable of deforming the movable sheet 38.

[0080] The movable sheet 38 comprises two lateral edges 48 extending vertically and longitudinally. The lateral edges 48 are transversely opposed. The lateral 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 and extend transversely. The window 36 extends between the first edge 50 and the second edge 52. The movement 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 provides a compact solution.

[0082] The means of movement 42 include a fixed support 56. The fixed support 56 can be connected to the structure of the motor vehicle. The first edge 50 is fixed to 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 means of movement 42 comprise an articulated arm 58 with a hinge 60. The means of movement 42 further comprise a rotating motor 62 configured to retract and extend the articulated arm 58, and to change its position by relative to the window 36. Generally, the rotating motor 62 acts as 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 allows for the formation of the bending means 46. This solution optimizes the range of deformation and compactness.

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

[0085] The display device 20 further includes a light source, referred to as an auxiliary light source 84. The auxiliary light source 84 is arranged between the movable sheet 38 and the glass 36. It is located on the side of the second face 82. It comprises, for example, a light-emitting diode (LED), or a row of such diodes. When illuminated, it illuminates the movable sheet 38, thereby increasing its visibility through the glass 36. Its power 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 both the first and second positions.

[0086] According to one embodiment, when the light-emitting screen 32 is illuminated, the auxiliary light source 84 gradually dims. Thus, the view of the moving sheet 38 is progressively replaced by the projected image; this increases the user experience and therefore the perceived quality.

[0087] Figure 4 shows a motor vehicle display device 20. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 3. The display device 20 is in a second configuration. The position of the passenger compartment 14 is indicated as a reference point. 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 virtual image (not shown) in front of the display device 20.

[0088] To reach the second position, the rotating motor 62 is powered so as to flex the articulated arm 58. The second edge 52 moved closer to the first edge 50. The profile 68 moved in the slide 54. The movable sheet 38 curved. It became concave. It moved away from the glass 36.

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

[0090] Following the powering of the means of movement 42, in the second configuration of the display device 20 and the movable sheet 38, the latter is at a second distance 72 from the glass 36. The second distance 72 is between 3 cm and 10 cm, preferably between 4 cm and 8 cm. Its inclination varies at different points.

[0091] The light-emitting screen 32 has a principal emission direction 74. In the first position and / or in the second position, along the principal emission direction 74, the movable sheet 38 comprises two lateral portions 76 with a first flexural stiffness, and a central portion 78 between the lateral portions 76, exhibiting a second flexural stiffness. The second flexural stiffness is less than the first flexural stiffness. Each flexural stiffness can be measured by a three-point bending test. A test specimen is held at two points or two parallel lines, and a deformation is imposed by applying a force between said two points. This force is the flexural 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 portion extends over at least a quarter, preferably a third of the loose 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 bending grooves; said bending grooves having different densities between the central portion 78 and the lateral portions 76. These solutions allow the bending stiffness of these portions to be varied.

[0093] It is noteworthy that, in the second position, the central portion 78 is further from the glass 36 than the lateral portions 76. Thus, the lateral portions 76 are more visible through the glass than the central portion 78. This feature allows the visibility of the movable sheet 38 to be modulated according to its height. Furthermore, when the movable sheet 38 deforms, the gradual disappearance of the central portion 78, accompanied by the persistence of the lateral portions 76, adds a specific visual effect. This further enhances the perceived quality.

[0094] Generally, the movable sheet 38 is opposite the light-emitting screen 32 with respect to the glass 36. Preferably, the movable sheet 38 faces the light-emitting screen 32 through the glass 36. Furthermore, the projected image is a projected luminous 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 include a thermoplastic material or a thermosetting material. According to a preferred embodiment, the The plastic material is selected from the group including polypropylene, polyamide, polyphthalamide, polyetheretherketone, polyphenylene sulfide, polyamide-imide, polyetherimide, polyarylamide, polyepoxide, unsaturated polyester, vinyl ester, or polyester-vinylester resins. For example, the composite material comprises a matrix of a plastic material as described above with reinforcement. For example, the reinforcement comprises glass or carbon fibers. The flip sheet 38 may include a coating. It may be tinted white to increase the visibility of the projected image. Other colors may be selected. The flip 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 vehicle's environmental footprint.

[0098] Figure 5 shows a diagram of a method for controlling a motor vehicle display device. The motor vehicle may correspond to the one 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 process includes the following steps, in particular executed in the following order.

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

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

[0102] c) displacement 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] At step a) standby 100, the moving sheet is static in the frame of reference of the display device. Step a) standby 100 may include waiting for an activation signal from the display device. The moving 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 containing information to emit the projected image. The projected image may be animated.

[0106] At step c) displacement 104, the displacement means are actuated. For example, they impose a mechanical deformation on the moving sheet. The articulated arm folds. The telescopic joint contracts.

[0107] The control method may include 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 to the screen, in which the moving sheet is visible through the glass; and an active mode that enhances the perception of the projected image since the moving sheet disappears as it moves back into the second position. Therefore, the invention optimizes perceived quality and safety by improving the visibility of the information on the light-emitting screen.

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

[0110] Step d) power supply 106 illuminates part of the moving sheet. This can be performed during step c) movement 104. This increases the perceived movement of the moving sheet and therefore the perceived quality. Step d) power supply 106 can be interrupted at step e) stop 108, while step b) projection 102 continues.

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

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

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

Claims

Demands

1. Display device (20) for 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 reflecting at least partially 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) opposite the second face (82) 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 gap (44) of the window (36) and a second position at a second gap (72) of the window (36).

2. Display device (20) according to claim 1, characterized in that the movement means (42) comprise bending means (46) of the movable sheet (38), said bending 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 bend into the second position.

3. Display device (20) according to any 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 means of movement (42) comprising a slide (54) guiding said second edge (52); preferably, the means of movement (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 any one of claims 1 to 3, characterized in that the light-emitting 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 any one of claims 1 to 4, characterized in that the means of movement (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 any one of claims 1 to 5, characterized in that the means of movement (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 any 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 gap (44) is less than or equal to 2 cm, and the second gap (72) is between 3 cm and 10 cm

8. cm. Display device (20) according to any one of claims 1 to 7, characterized in that the movement 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) conforms to any one of claims 1 to 8; preferably, the light-emitting screen (32) is above the window (36).

10. A method for controlling a motor vehicle (10) display device (20); characterized in that the display device (20) conforms to any 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 mode (100), with the movable sheet in the first position; b) projecting (102) an image projected onto the glass by the light-emitting screen (32).

Images