Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
  • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
  • B60K35/22—Display screens
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
  • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
  • B60K35/211—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays producing three-dimensional [3D] effects, e.g. stereoscopic images
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K37/00—Dashboards
  • B60K37/20—Dashboard panels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
  • B60K2360/1523—Matrix displays
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
  • B60K2360/60—Structural details of dashboards or instruments
  • B60K2360/68—Features of instruments
  • B60K2360/688—Frames or decorative parts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
  • B60K2360/816—Fastening of displays or touch screens
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
  • B60K2360/92—Manufacturing of instruments
  • B60K2360/96—Manufacturing of instruments by assembling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
  • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/10—Road Vehicles
  • B60Y2200/11—Passenger cars; Automobiles

Definitions

• the present invention generally relates to the technical field of display.
• - a structural part comprising a frame which at least partially frames the display and one end face of which forms a support surface on which said plate is applied.
• Such display devices are used in motor vehicles to display information intended for the driver of the motor vehicle or for the passengers of this motor vehicle.
• the display is the functional element that displays the information.
• the plate made for example of glass, makes it possible to cover the display and forms a facade which gives an aesthetic appearance to the display device. It can be curved in a way that gives a more immersive impression to the individual using it.
• Glue is generally used to fix the plate to the structural part. This is interesting in particular when the plate has a non-zero curvature, since in this case the structural part can be shaped to maintain the plate with the desired curvature.
• the plate has a constant radius of curvature.
• This plate is said to have a cylindrical shape with a large radius of curvature.
• the present invention proposes not to work on the glue used to glue the plate on the structural part, but rather on the shape of this plate. and this structural part. More particularly, the invention proposes a display device as defined in the introduction, in which the support surface is curved substantially according to a mathematical function which has a hyperbolic cosine term.
• the cylindrical shape of the plate is such that the adhesion forces that the glue exerts are not uniform over the entire bonding surface.
• the plate has the shape of a rectangle elongated horizontally and curved around a vertical axis, these stresses are greater in the central part than on the sides. There is then a risk of delamination of the central part of the plate with respect to the structural part.
• the idea of the invention is therefore to design the plate and the structural part in such a way that the adhesion forces that the glue exerts are more uniform, so that the risks of delamination of the plate compared to the structural part are very limited as long as the display device is used under normal conditions of use.
• the hyperbolic cosine shape has been found to be the most natural shape, which ensures the best distribution of forces. This is why it is used here.
• the plate is glued to the end face of the frame
• the frame has four branches, including two opposite first branches of lengths greater than the other two branches, the average width of the first two branches being at least twice less than the average width of the other two branches;
• the plate has a constant thickness; - the plate is made of glass;
• the support surface is discontinuous and delimits at least one recess which forms a passage for an electric cable or for a means of fixing a cover;
• FIG. 1 is a schematic exploded perspective view of a display device according to the invention.
• FIG. 2 is a front view of a structural part of the display device of FIG. 1;
• FIG. 3 is a bottom view of the structural part of FIG. 2;
• FIG. 4 is a schematic perspective view of a detail of the structural part of figure 2.
• FIG 1 there is shown a display device 100.
• This display device 100 is specially designed to be used in a motor vehicle interior, for example in a car, van or truck interior.
• front and rear will be used with respect to the passenger compartment of the motor vehicle, the front of an element designating the side of this element which faces the user of the display device ( therefore towards the trunk of the vehicle) and the rear designating the side of this element which faces the opposite side (thus towards the bonnet of the vehicle).
• the display device will be installed in the dashboard in such a way that its facade extends globally in a vertical plane (this is that is to say that it extends globally in length along a horizontal axis and in width along a vertical axis).
• the display device can be installed differently in the dashboard of the vehicle.
• the display device 100 comprises at least three elements, namely a display 150, a front plate 170 provided in particular to protect the display 150, and a structural part 180 allowing these two elements to be fixed in the board on board the vehicle.
• the illumination unit 110 makes it possible to backlight the display 150 and a protective cover (not shown).
• the display 150 is a light modulator.
• This slab has the shape of a plate of constant thickness and rectangular outline.
• the polarizer comprises a polarizer and an array of liquid crystal cells which each controllably affect the polarization of the incident light (produced by the illumination unit 110).
• the presence of the polarizer makes it possible to obtain at the output a quantity of light which depends on the polarization imparted by the cell concerned and which is therefore adjustable by command of this cell.
• the illumination unit 110 comprises a light source (not visible, formed for example of several tens of light-emitting diodes) and, in front thereof, three films 112, 113, 114 allowing to homogenize the light over the entire surface of the rear face of the display 150.
• the illumination unit 110 also comprises an opaque rear wall 111 on which the light source and the three films are fixed, and which is itself fixed on the structural part 180.
• this configuration is specific to the use of a TFT-LCD type display.
• the display is of the OLED type, no illumination unit separate from the display would be used.
• the display 150 is glued by its front face to the faceplate 170.
• a film of glue 160 is used for this purpose to glue the entire surface of the front face of the display 150 to the rear face of the front plate 170.
• the glue used here is an optical glue.
• the positioned adhesive film 160 has a thickness of between 0.1 and 1 mm (here equal to 0.5 mm).
• a central part 171 of the front plate 170 therefore applies against the display 150 via the adhesive film 160.
• a matrix of detectors (for example capacitive) can be interposed between the display 150 and the front plate 170, in order to form a tactile display device.
• this matrix of detectors could be integrated into the display 150.
• the front plate 170 is curved and at least partially transparent. It is curved around an axis A1 located at the front of this plate, so that its front face is concave.
• It has a constant thickness preferably between 0.5 and 2 mm, here equal to 1.1 mm.
• the front plate 170 covers the entire front face of the display device 100. It thus overflows on each side of the display 150.
• the front plate 170 is for example made of glass.
• the front plate 170 could be made of a polymer material, for example poly(methyl methacrylate) or polycarbonate or a combination of these two materials.
• the front plate 170 is curved.
• this curvature is obtained when bonding the front plate 170 to the structural part 108. Before that, it is flat. [0053] In a second embodiment, it is shaped (for example by molding) with the curvature that it will present once the display device is assembled, or manufactured so as to be flat and then bent by force during a shaping step (a process of heating and deformation by gravity can for example be used).
• the front plate 170 is glued to the structural part 180. It is more precisely glued by its rear face (in a peripheral zone located around the central zone 171) on the face of front end 182 of the structural part 180.
• This structural part 180 is shown in detail in Figures 2 and 3.
• the base 184 comprises a rear part (hereinafter called base 184) and a front part (hereinafter called frame 181) extending in the direction of the front plate 170, from the base 184.
• the base 184 has four side walls arranged in a rectangle around the display 150. It is thus open forwards and backwards.
• the rear wall 11 1 of the illumination unit 1 10 is provided to be fixed against the rear end edge of the base 184 to close it.
• the frame 181 extends from the front edge of the base 184, like a collar which surrounds the whole of this base 184.
• upper 181 C and lower 181 A branches are thinner than its two side branches 181 B, 181 D. In practice, they have constant widths (with the exception of the areas in which they are interrupted), from order of 3 to 10 mm, and more preferably between 5 and 10 mm.
• the side branches 181 B, 181 D have the shapes of rectangular trapezoids, the two parallel edges of which extend in the extension of the outer edges of the upper 181 C and lower 181 A branches. These side branches 181 B , 181 D therefore form flanges by which the display device 100 can be fixed in the dashboard of the motor vehicle.
• the structural part 180 thus frames the display 150 and the illumination unit 110.
• aluminum based alloy aluminum based alloy
• the front end face 182 of the frame 181 is provided to receive the front plate 170.
• the objective is that this curvature ensures a good distribution of the stresses in the glue used to fix the front plate 170 to the frame 181. This objective is all the more important as the bonding surface is reduced, in particular at the level upper 181 C and lower 181 A branches of the frame 181 .
• the front end face 182 of the frame 181 is then curved in a shape which is substantially defined by a mathematical function having a hyperbolic cosine term.
• the front end face 182 of the frame 181 is curved according to this mathematical function, within manufacturing tolerances.
• the dispersion between the required form (given the mathematical function) and the form obtained from the front end face 182 of the frame 181 is preferably less than 1 mm at any point. In other words, the minimum Euclidean distance between these two geometric surfaces is less than one millimeter at any point.
• the front end face 182 is said here to be defined by a mathematical function in the sense that there is at least one plane in which the intersection (hereinafter called "trace") of the front end face 182 with this plane forms a curve C1 (see Figure 3) whose mathematical function has a hyperbolic cosine term.
• the front end face 182 of the frame 181 is here curved symmetrically on either side of a plane which, in our example, extends vertically.
• the trace of the front end face 182 of the frame 181 extends along a curve C1 whose mathematical function has a hyperbolic cosine term.
• the front end face 182 of the frame 181 is preferably profiled in the sense that its trace extends along a curve whose mathematical function is the same regardless of the horizontal cutting plane P1 considered.
• the trace of the front end face 182 of the frame 181 extends along a straight line.
• a horizontal section plane P1 namely that which passes through the middle of the frame 181 (see Figure 3).
• this cutting plane P1 one can consider the orthonormal reference (0, X, Y) whose origin 0 is located in the plane of symmetry of the front end face 182 of the frame 181, on a fictitious axis A1 around which the front end face 182 would be curved.
• the Y axis is located forward and the X axis is oriented towards the side of the vehicle.
• the term y corresponds to the value of the ordinate
• the term x corresponds to the value of the abscissa
• a, b and c are predetermined constants.
• the constant c has a value which depends on the position of the origin O of the chosen marker.
• the facade plate extends in width over 300 mm and its radius of curvature is such that the deflection of this plate is 10 mm
• the constants a and b will respectively take the values 110 and 10.
• this is only one example among many others.
• the front plate 170 is then able to support significant tensile and torsion forces, greater than 400 N, whereas this plate is particularly thin and the bonding zones are not very wide.
• the bearing surface formed by the front end face 182 of the frame 181 for the front plate 170 extends along a rectangle-shaped outline.
• this support surface is however discontinuous and delimits at least one recess 183 which forms a passage, for example for an electric cable or for a means of fixing the protective cover.
• the recesses 183 provided in the lower branch 181 A of the frame 181 allow in particular the passage of electrical cables to electrically connect the display 150 and the illumination unit 110 to electrical supply and/or control circuits. (not shown).
• the upper branch 181 C of the frame 181 has several recesses 183 which extend hollow in its upper face.
• the bottom of each of these recesses 183 accommodates fixing means (here clipping means) allowing the protective cover (not shown) to be fixed there.
• the design office in charge of vehicle design determines a desired radius of curvature for the front panel 170 and a desired width for the display 150.
• the front plate 170 which is intended to be glued to the structural part 180, is intended to be curved not in an arc of a circle but in an arc of a hyperbolic cosine curve. .
• the desired radius of curvature is only an order of magnitude of the desired curvature.
• This radius of curvature can be very small insofar as the distance between the user and the screen is particularly small in a vehicle, so that the desired immersion effect is obtained by strongly bending the plate of facade 170.
• This radius of curvature is for example between 20 cm and 5 m.
• the design of the display device 100 will then consist in choosing the values of the constants a and b of the aforementioned Math.1 equation.
• This choice will be made so that the display 150 shows the width desired and that the difference between an arc of a circle having the desired radius of curvature and the curve C1 of the front end face 182 of the frame 181 is minimum.
• This search for a minimum will preferably be carried out by minimizing the quadratic mean between these two curves (in the RMS sense of the English “root-mean-square”).
• the display device 100 can be assembled.
• assembly of the device is achieved by taking a flat face plate and gluing it to the front end face 182 of the frame 181 (which forces it to bend in the desired).
• the display 180 is then glued to the back of this front plate 170.
• the face plate 170 is manufactured so as to be curved even before it is installed on the frame 181 . It is then glued to the frame 181 before the display 150 is itself glued to its rear face.
• the present invention is in no way limited to the embodiments described and represented, but those skilled in the art will know how to make any variant in accordance with the invention.
• the front plate could have a shape other than trapezoidal, for example rectangular. It could have a variable thickness.
• the structural part could itself have a different shape. Its frame could for example have branches of different shapes, with or without recesses.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Devices For Indicating Variable Information By Combining Individual Elements (AREA)
• Liquid Crystal (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=74554108

Family Applications (1)

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Family Cites Families (5)

• 2020
  • 2020-12-17 FR FR2013509A patent/FR3117953B1/fr active Active
• 2021
  • 2021-12-16 EP EP21839189.4A patent/EP4263263A1/de active Pending
  • 2021-12-16 US US18/268,020 patent/US20240051395A1/en active Pending
  • 2021-12-16 WO PCT/EP2021/086317 patent/WO2022129418A1/fr not_active Ceased

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