CN106945524B

CN106945524B - Display device for a motor vehicle

Info

Publication number: CN106945524B
Application number: CN201611168315.2A
Authority: CN
Inventors: S.特米茨
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2015-12-18
Filing date: 2016-12-16
Publication date: 2022-03-01
Anticipated expiration: 2036-12-16
Also published as: CN106945524A; DE102015226025A1; FR3045912A1; FR3045912B1

Abstract

The invention relates to a display device (30) for a motor vehicle, comprising a display unit (31) having at least one dot-matrix display (32); with a mounting frame (34) for accommodating the display unit (31); and a transparent cover (38) for covering the display unit (31) on the side facing the display surface of the display unit (31), wherein the mounting frame (34) is connected to the transparent cover (38) by means of pressure welding or adhesive bonding in such a way that the display unit (31) is held adjacent to the transparent cover (38) by means of the mounting frame (34).

Description

Display device for a motor vehicle

Technical Field

The invention relates to a display device for a motor vehicle.

Background

DE 102009000418 Al discloses that a structural component for a display device is mounted in a motor vehicle by means of a bayonet connection. The cover glass arranged in the inner tube is arranged in front of the display unit with the mechanical fastening by means of a bayonet connection.

DE 102013204823 Al discloses a display device in which a cover glass is arranged in a planar manner on a display cell with an adhesive layer in the form of a light-bonding layer being interposed.

Disclosure of Invention

Advantages of the invention

The display device for a motor vehicle having the features according to the invention accordingly has the advantage that a protected assembly of one or, if appropriate, a plurality of display units is possible, without it being possible to transmit compressive stresses to the display units in an interfering manner, in particular by thermal differences. Furthermore, the display unit is arranged adjacent to a transparent cover in a space-saving manner, which protects the display and can improve the readability if necessary.

These advantages are achieved by a display device with a display unit comprising at least one dot-matrix display section; with a mounting frame for receiving the display unit; and a transparent cover plate for covering the display unit on a side facing the display surface of the display unit, wherein the mounting frame is connected to the transparent cover plate by means of pressure welding or gluing in such a way that the display unit is held adjacent to the transparent cover plate by means of the mounting frame.

By the connection to the mounting frame by means of pressure welding or gluing, it is achieved that thermal stresses can be received by the pressure welding connection or gluing connection. It is not necessary, however, that the display backlight unit itself be contacted by means of pressure welding or gluing, so that stresses (which can be generated by heating when the vehicle is subjected to thermal influences during use) are not transmitted to the display. Furthermore, the mounting frame has an additional stability, by means of which the corresponding thermal stresses can be additionally arrested. By means of the adhesive connection between the mounting frame and the cover glass, it is also achieved that the display is not loaded by the mass of the glass itself, so that a greater glass mass and thus also a greater glass surface can be achieved. In particular, glass breakage, for example during manufacture, can be avoided in this way. Likewise, any complex glass form, so-called free form-geometry features, can be used and stabilized by connecting the glass to the mounting frame.

Furthermore, it is also possible to compensate tolerances in the thickness of the transparent cover plate or in the molding by means of the mounting frame. Thus, tolerances in the thickness and in the forming are not transmitted to the display unit, but are received by the mounting frame.

Further advantages result from the construction according to the preferred embodiment and the further embodiments. It is thereby advantageous if the display unit has a display surface and a circumferential narrow side adjoining the display surface, which narrow side is surrounded by the mounting frame. It is thereby possible to impart additional stability to the display by means of the mounting frame, which is preferably embodied more stably than the display unit.

It is also advantageous if the display unit is held by the mounting frame, spaced apart from the transparent cover. In this way, direct mechanical contact with the cover plate can be avoided, so that damage to the transmission of thermal stresses or through frictional contact can be avoided.

It is also advantageous if the transparent cover is embodied in a curved manner. It is possible to integrate the covering panel into a larger, possibly curved dashboard. In particular, it is possible to ensure better visibility and readability of the display for the driver in larger areas.

It is also advantageous to provide a support frame for receiving the mounting frame, wherein mechanical connecting means are provided on the mounting frame for producing a mechanical connection to the support frame. Thereby, the mounting frame serves as an intermediate piece between the display unit and a carrier frame, in which further components of the display device are arranged. In this way, it is possible for the display unit to be decoupled from the carrier frame by means of the mounting frame with respect to mechanical stresses, since a direct mechanical connection exists only between the carrier frame and the mounting frame, but not between the carrier frame and the display unit.

In an alternative embodiment, the carrier frame can also be connected to the display unit, as an alternative or as a supplement. In this way, a further mechanical stabilization of the display unit is possible, but the connection to the mounting frame allows flexibility with respect to the transparent cover.

It is particularly advantageous if electronic circuits are provided on the carrier frame in order to actuate the display unit. In this way, further electronic connections, for example bus connections, can also be led out of the carrier frame via the contacts from the display device.

In order to protect the display device, a cover is advantageously arranged on the carrier frame, which cover protects the elements arranged on the carrier frame, in particular initially during assembly.

Furthermore, advantageously, at the mounting frame, adjacent to the accommodation for the display unit, a mouth for holding the display unit is provided. In this way, if necessary, additional display units that are smaller than the display unit can also be fastened to the transparent cover in a suitable manner. It is thereby possible in particular to arrange additional display elements, for example warning lights or cameras, in the vicinity of the display unit. In a particularly simple manner, such a display unit can be arranged on a transparent cover plate with an adhesive layer, which is arranged, for example, on the display unit itself. Here, the mounting frame serves to position and hold the display element. The direct mounting of the display element on the inner side of the transparent cover and the fastening and positioning via the mounting frame allow an exact and light-tight positioning of the display element.

Drawings

Embodiments are illustrated in the accompanying drawings and explained in more detail in the following description. The figure is as follows:

figure 1 is a schematic view of a display device,

figure 2 is an embodiment for the arrangement of the display device in the dashboard of a vehicle,

figure 3 is a cross-sectional view of the display device in a first embodiment,

figure 4 is a cross-sectional view of a display device in a second embodiment,

figure 5 is the side of the transparent cover facing away from the viewer of the display device,

figure 6 is the side of the mounting frame facing away from the transparent cover plate,

fig. 7 is an embodiment for a mounting frame and a transparent cover, wherein the transparent cover is bent,

fig. 8 shows an exemplary embodiment of the arrangement of a further display unit in the mounting frame adjacent to the display unit at the transparent cover.

Detailed Description

In fig. 1 a display device 1 is schematically shown. The display device 1 is used in particular in a vehicle, for example in a motor vehicle. The display device 1 is preferably embodied here as an installation module which is arranged in the vehicle in front of the driver in the dashboard. Thereby, the driver can observe the display device 1 during driving so as to read information about the vehicle state or the vehicle surroundings. For this purpose, the display device 1 is equipped with a display unit 2. The display unit 2 is in particular embodied as a dot matrix display. In particular, the display unit 2 can be implemented as a liquid crystal display portion. In a preferred embodiment, a backlight unit for backlighting the liquid crystal display section is integrated into the display unit 2.

Furthermore, a design in the form of another dot-matrix display is possible, for example an OLED display. Preferably implemented as part of the display unit 2, which itself is operated by a driving device 3 which operates a dot matrix display of the display unit 2. The image data to be presented of the display unit 2 is further transmitted from the computing device 4 via a data bus 5 to the drive device 3. On the display surface of the display unit 2, vehicle information is displayed in the form of, for example, a scale display section 6. Furthermore, the symbol 7 can also be shown. Furthermore, it is also possible, for example, to present an image captured by a camera, which is not shown in fig. 1, in the display unit 2.

The computing device 4 is connected via an interface 8, for example, to a vehicle data bus 9, for example a CAN bus. Vehicle information, for example the real-time speed or the motor speed, can be transmitted to the display device 1 via the data bus 9. The computing device 4 processes information obtained via the interface 8 to the data bus 9.

The display device 1 can have further interfaces. It is thus possible, for example, to provide an interface 10, for example a radio interface, via which the display device 1 can be connected to an external data source, for example a mobile telephone. From there, the information to be presented in text form or image form or the audio information to be output can be further transmitted to the display device 1. For outputting information, the display device 1 has a third interface 11, for example a multimedia data bus. Via the third interface 11, an audio output unit or a further display in the vehicle can be controlled. The programs for operating the display device 1 and the data of the information to be displayed, for example the symbol pattern, can be stored in a memory 12, which can be accessed by the computing device 4.

In one embodiment, it is also possible to provide a further display unit 13 in addition to the display unit 2. In the embodiment shown here, a further first display unit 13 is arranged on the left side of the display unit and a further second display unit 14 is arranged on the right side of the display unit. The

further display units

13, 14 can, for example, be equipped with light-emitting diodes or other light sources, for example for backlighting window sections provided with an imprint, so that, independently of the display unit 2, warnings can be displayed for the driver of the vehicle. The

display units

13, 14 are also preferably operated by the computing device 4.

Fig. 2 shows an exemplary embodiment of the assembly of a display device in an instrument panel 20 of a vehicle. A glass cover 22 is provided below the upper edge 21 of the instrument panel. This glass cover 22 is preferably included in the area in front of the driver and extends into the area of the center console 23. If necessary, a plurality of individual, adjacent glass covering sections can also be provided. In a preferred embodiment, the glass surface 22 is curved in order to be adapted to the form of the instrument panel. Furthermore, any desired, free shaping is also possible. In the embodiment shown here, a first display device 24 and a second display device 25 are arranged in the manner according to the invention on the rear side of the glass surface 22.

An example of an arrangement for a display device behind such a glass plate is shown in fig. 3.

Fig. 3 shows a cross-sectional view of the display device 30 in the first embodiment. A display unit 31 with a dot matrix display 32 is arranged in the display device 30. The display unit 31 also has a housing 33 in which a driving unit and a backlight unit of the dot matrix display part 32 are preferably arranged. The dot matrix display unit 32 is implemented as a liquid crystal display unit, for example. The glass plate of the liquid crystal display forms in this case a dot matrix display 32, while the other components, for example the backlight or the drive unit, are arranged in a housing 33 of said display unit 31.

The display unit 31 is accommodated in the mounting frame 34. The mounting frame 34 has a holding portion 35 that surrounds the side of the display unit 31. In one embodiment, it is also possible for the nose or latching element 36 of the mounting frame 34 to engage in a corresponding opening of the display unit 31, so that the display unit 31 is held in the mounting frame 34. The mounting frame 34 is preferably implemented to be inflexible, so that the display unit 31 obtains additional stability against deformation due to external pressure by the mounting frame 34. For this purpose, the mounting frame is made of metal, for example aluminum, or of a plastic material, for example polycarbonate, in particular polycarbonate with a glass fiber fraction of 10% (PC GF 10) or polyphenylene sulfide (PPS G45), in particular with a glass fiber fraction of 45%. The mounting frame here has a suitable form and use of plastic material, for example, a wall thickness of 1-2mm, in order to support the mechanical stability of the dot-matrix display.

The dot matrix display unit 32 forms a display surface that can be viewed from the driver of the vehicle. From one viewing direction, the display surface of the dot-matrix display 32 and the adjacent front side 37 of the mounting frame 34 are covered by a transparent cover 38, for example in the form of a transparent cover plate. The transparent cover 38 is made of a transparent, translucent material, such as glass or polymethyl methacrylate (polymethyl methacrylate).

In one embodiment, it is possible to provide a light-impermeable cover or coating 39 in a partial region at the transparent cover 38. The light-impermeable coating 39 saves here the area of the dot-matrix display 32 and the display surface formed therewith, so that the dot-matrix display 32 can be seen by a viewer through the material of the transparent cover 38. The opaque coating or embossing can be, for example, a dull color or a printed foil.

In the embodiment shown here, the cover 39 or the cover is arranged on the side of the transparent cover 38 facing away from the mounting frame 34 and facing the viewer. Alternatively or additionally, the cover or cover 39 can also be arranged on the opposite side of the transparent cover 38.

In the region outside the dot matrix display 32, the transparent cover 38 is glued or welded to the mounting frame. In this case, an adhesive 40 is arranged between the transparent cover 38 and the mounting frame. During installation, the adhesive 40 can be applied either to the transparent cover 38 or to the mounting frame 34 or to both elements. In this case, an adhesive material is preferably selected which achieves a balance of the mechanical stresses between the two components in the event of different thermal expansions of the materials of the transparent cover 38 and the mounting frame 34. For this purpose, a UV-curable liquid adhesive or a double-sided adhesive tape is used as the adhesive material.

In the embodiment shown here, the adhesive 40 is arranged between the mounting frame 34 and the transparent cover 38 in such a way that no adhesive is arranged in the area of the dot-matrix display 32 at the transparent cover and also at the dot-matrix display 32. Thereby, the adhesive is arranged completely outside the display surface.

In the form embodied here, the display unit 31 is connected to the transparent cover, preferably without a distance, by an optical adhesive.

The mounting frame 34 also has mechanical fasteners to anchor the mounting frame, including the display unit 31 and the transparent cover, within the display device 30. In the embodiment shown here, the screw boss 41 is arranged at the mounting frame 34. The mounting frame 34 can thus be connected to the remaining display devices 30 via a screw connection.

In the embodiment shown here, a carrier frame 42 is provided, which has a corresponding screw opening 43. The mounting frame can be connected to a carrying frame 42 by screwing screws into screw openings 43 and corresponding screw bosses 41. The axis of rotation of the screw, not shown, is shown by the dashed line 47.

On the side of the carrier frame 42 facing away from the display unit 31, a cover is provided, by means of which the rear side of the display device 30 can be covered.

In the embodiment shown here, an electronic control unit 45 is arranged on the carrier frame 42. The electronic control unit 45 is connected to the display unit 31 via a control connection 46, so that the energy supply and/or data transmission of the display unit 31 can take place via the control connection 46, which is embodied, for example, as a flexible conductor element.

Preferably, three screw connections are provided between the carrying frames 42 in the mounting frame 34. Instead of a screw connection, it is also possible to provide a latching connection. It is particularly advantageous to latch the rear cover 44 facing away from the viewer to the support frame 42.

In the embodiment shown here, the transparent cover 38 completely covers the mounting frame 34 and projects past it. In another embodiment, but also possible, the mounting frame 34 protrudes through the transparent cover. Preferably, such a region can be concealed from the observer by further elements, which are optionally dependent on the dashboard and not dependent on the concealing device.

In fig. 4, a further embodiment of a display device 30' is shown in a sectional view. In this embodiment, the carrier frame 42 is connected to the housing 33 of the display unit. For this purpose, a plurality of, in particular between two and six (inclusive),

screw bosses

92, 93 are preferably arranged in the edge region of the rear side 91 of the housing 33 on the side of the housing 33 facing away from the transparent cover 38. Corresponding screw bosses are formed to the carrier frame 42. For fastening, screws are screwed through the carrier frame 42 into the

screw bosses

92, 93 of the housing 33. Alternatively, a snap lock is also possible.

Fig. 5 shows a view of a transparent cover in the form of a transparent cover 38 in the direction from the display unit 31. The transparent cover 38 has a transparent light-transmissive window 50 through which the display surface of the display unit 31 can be viewed. The remaining surface 51 of the transparent cover 38 is adhesively bonded or coated in a light-tight manner. Adjacent to the window portion 50, a window portion 52 is also provided, which is likewise of transparent or translucent design. In another embodiment, the symbol regions can also be embossed into the light-transmissive window portion 52. The light-transmissive window portion 52 is for: visibility of the lighting unit disposed rearward of the window portion 52 is achieved. The window can be optionally actuated in order to display information, in particular warning information, for the driver. The display unit 31 can also be active at this time if it is disturbed once, so that in this case also important information can be presented to the driver.

Adjacent to the transparent or

translucent regions

50, 52, a first adhesive element 53 and a second adhesive element 54 are arranged.

Adhesive elements

53, 54, which are designed, for example, as double-sided adhesive tapes, are applied to the material of the transparent cover 38. In a further embodiment, the adhesive material can also be applied to the transparent covering plate by means of an adhesive applicator (for example in the form of an adhesive plate). The mounting frame 34 is sleeved onto these

adhesive elements

53, 54 during the manufacture of the display device 30.

The transparent cover 38 can be designed with respect to its edge in such a way that it can be pressed into a recess of the dashboard of the vehicle. In one embodiment, the transparent covering 38 can also be curved, in particular concavely, with respect to the side facing the viewer.

An embodiment for the mounting frame 34 is shown in fig. 6. The mounting frame 34 has a receptacle 60 into which the housing 33 can be fitted with a form fit with the display backlight.

In one embodiment, the edge 61 of the mounting frame can be connected to a backlight unit. In fig. 5, the side of the mounting frame 34 facing away from the cover plate 38 is shown. In the embodiment shown here, three

screw bosses

62, 63, 64 are provided on the rear side of the mounting frame 34 facing away from the cover plate 38. The mounting frame 34 is preferably connectable to a carrying frame via screw bosses. The screw boss is designed such that the positioning aid is formed to the screw boss. In the embodiment shown here, first and

second profiles

65, 66 are formed on the screw bosses, for example, which simplify the correct fitting of the transport tool onto the mounting frame 34 during production.

The mounting frame has a first mouth 67 and a second mouth 68 in the embodiment shown here, spaced from the receptacle 60. A further display unit can be inserted into said

mouths

67, 68.

In fig. 7 an embodiment for a mounting frame 70 is shown, which fits to a curved, transparent cover plate 71. The transparent cover 71 is glued to the mounting frame 70 by means of a glue element 72. The receptacle 73 for the dot matrix display unit and the mouth 74 for a further display unit are shown in dashed lines. With a mounting frame constructed in this way, transparent covering panels with an extension of more than 40cm can thus be mounted in a vehicle in a bending-resistant and fracture-resistant manner.

In fig. 8, an embodiment of a further display unit 80 is shown, which is movable into one of the

mouths

67, 68 in the mounting frame 34. The display unit 80 has a first light source 81 and a second light source 82. The

light sources

81, 82 are in particular designed as individually controllable light-emitting diodes. The display unit 80 has a frame 83, in particular made of plastic material, into which the

light sources

81, 82 are fitted and held. In a further embodiment, it is also possible for further functional elements to be incorporated into the display unit 80, for example a camera unit for viewing the driver or a receiving unit for brightness control or for receiving remote control signals. On the side directed towards the transparent cover portion 38, an adhesive material 84 is applied to the display unit 80 in one embodiment. When the display device is produced, the display unit 80 is pushed into one of the

mouth parts

67, 68 and is then firmly glued to the transparent cover part 38, so that subsequently the light of the

light sources

81, 82 can pass through the corresponding transparent regions of the transparent cover plate in order to display information to the driver.

Claims

1. Display device (30) for a motor vehicle, comprising a display unit (31) having at least one dot-matrix display (32); a mounting frame (34) with a housing (33) for accommodating the display unit; and a transparent cover (38) for covering the display unit (31) on the side facing the display surface of the display unit (31), wherein the mounting frame (34) is connected to the transparent cover (38) by means of pressure welding or adhesive bonding: so that the housing (33) of the display unit (31) is held adjacent to the transparent cover (38) by means of the mounting frame (34), the front projection or latching element (36) of the mounting frame (34) engaging in a corresponding opening of the display unit (31) so that the display unit (31) is held in the mounting frame (34), a carrier frame (42) for receiving the mounting frame (34) being provided, wherein a mechanical connection (41) is provided at the mounting frame for producing a mechanical connection to the carrier frame (42), but no direct mechanical connection exists between the carrier frame (42) and the display unit (31).

2. A display device as claimed in claim 1, characterized in that the display unit (31) has a display surface and a surrounding narrow side of the housing (33) adjoining the display surface, wherein the mounting frame (34) surrounds the display unit (31) at the narrow side.

3. A display device as claimed in claim 1 or 2, characterized in that the display unit (31) is held by the mounting frame (34) at a distance from the transparent cover (38).

4. A display device as claimed in claim 1 or 2, characterized in that the transparent cover (38) is curved.

5. A display device as claimed in claim 1, characterized in that an electronic circuit (45) is provided at the carrier frame (42) for operating the display unit (31).

6. A display device as claimed in claim 1, characterized in that a cover (44) is arranged on the side of the carrier frame opposite to the transparent cover (38) and is connected to the carrier frame (42).

7. A display device as claimed in claim 1 or 2, characterized in that the mounting frame (34) has a mouth (67, 68) for holding a display unit (80) adjacent to a receptacle (60) for the display unit (31).

8. A display device as claimed in claim 7, characterized in that the display unit (80) comprises at least one warning lamp (81, 82).

9. A display device as claimed in claim 7, characterized in that the display unit (80) has an adhesive layer (84) at the side directed towards the transparent cover portion (38) for adhering the display unit (80) to the transparent cover portion (38).

10. A method for producing a display device for a motor vehicle, in which a display unit comprising at least one dot-matrix display is inserted into a mounting frame for accommodating the display unit, in which display device the mounting frame with the display unit is glued to a transparent cover plate in order to cover the display unit on the side facing the display surface of the display unit, and in which the mounting frame is connected to the transparent cover plate by means of pressure welding or gluing in such a way that the display unit is held adjacent to the transparent cover plate by means of the mounting frame, the nose or latching elements (36) of the mounting frame (34) engaging in corresponding openings of the display unit (31) in such a way that the display unit (31) is held in the mounting frame (34), a carrier frame (42) is provided for receiving the mounting frame (34), wherein mechanical connecting means (41) are provided at the mounting frame for producing a mechanical connection to the carrier frame (42), but no direct mechanical connection exists between the carrier frame (42) and the display unit (31).