CN113612470A

CN113612470A - Display device for vehicle

Info

Publication number: CN113612470A
Application number: CN202110481119.5A
Authority: CN
Inventors: 克里斯托菲·卡维利厄
Original assignee: Faurecia Interieur Industrie SAS
Current assignee: Faurecia Interieur Industrie SAS
Priority date: 2020-05-05
Filing date: 2021-04-30
Publication date: 2021-11-05
Also published as: FR3109916A1; FR3109916B1

Abstract

Display device (10) for a vehicle, in which: -a first transparent or translucent layer (20) comprising at least one first three-dimensional figure (22); -a second electronic layer (30) comprising a first light source (32) and at least one first capacitive electrode (50), the first light source (32) being configured to illuminate a first three-dimensional figure (22), the outline of the first three-dimensional figure (22) being aligned with the capacitive electrode (50) in a direction (N) perpendicular to said three-dimensional figure (22); wherein the first light source (32) is arranged angularly offset from the first capacitive electrode (50).

Description

Display device for vehicle

Technical Field

The present invention relates to a display device for a vehicle, in particular a motor vehicle.

Background

Display devices are well known in the automotive field. Such devices provide a user with one or more display areas associated with control features (e.g., buttons). In particular, the display area allows indicating the status of the devices in the vehicle, for example by changing the displayed graphics, after actuation of the control component. Since the display area is usually of a simple design in order to reduce the cost of the control and display device, the displayed graphics are changed by displaying different graphics in a different area than the area in which the first graphic was displayed prior to actuation of the control member. Furthermore, the displayed graphics are visually simple and of low quality.

However, the large increase in control and display devices in the passenger compartment of a vehicle also creates problems due to the reduced space available for the display area.

Disclosure of Invention

It is an object of the present invention to provide a display device for a vehicle which does not have the disadvantages of the prior art.

To this end, the invention provides a display device for a vehicle, in which the following are superimposed:

-a first transparent or translucent layer comprising at least one first three-dimensional graphic;

-a second electronic layer comprising a first light source and at least one first capacitive electrode, the first light source being configured to illuminate a first three-dimensional pattern, the outline of the first three-dimensional pattern being aligned with the capacitive electrode in a direction perpendicular to the three-dimensional pattern;

wherein the first light source is arranged angularly offset from the first capacitive electrode.

Thus, the device can be controlled by pressing the display area. Thus, information may be displayed in an improved visual rendering in a limited space.

According to a preferred embodiment, the device according to the invention has one or more of the following features, alone or in combination:

-the first layer comprises: a first level comprising a first three-dimensional graphic and a second level comprising at least one second three-dimensional graphic; the second electronics layer further includes a second light source configured to illuminate the second three-dimensional graphic;

-the first layer comprises a touch sensitive film for activating the first light source and/or the second light source by tactile contact of the touch sensitive film in correspondence with a capacitive electrode;

-the first light source and the second light source are arranged parallel to each other such that the first light source illuminates the first three-dimensional figure and not the second three-dimensional figure, and such that the second light source illuminates the second three-dimensional figure, preferably not the first three-dimensional figure;

-a third layer facing a second face of the second layer, said second face being opposite to the first face of the second layer, said first face facing the first layer, the second layer further comprising at least one planar figure corresponding to the two-dimensional projection of the first three-dimensional figure and a third light source directed towards the third layer, the third light source being shaped to illuminate the planar figure and the three-dimensional figure;

-the third layer is shaped to direct light emitted by the third light source through the planar pattern;

the third layer comprises a reflective interface surrounding the transparent area, the reflective interface preferably having a reflectivity of more than 80%;

the first light source is arranged perpendicular to the third light source around the three-dimensional figure;

at least two third light sources are shaped to illuminate the same planar figure and the associated first three-dimensional figure.

According to another aspect, there is provided a method for manufacturing a display device, including:

providing an electron shell, called "second shell", comprising a first light source and at least one first capacitive electrode,

-implanting a first or transparent layer onto a second layer, and

-in the first layer, laser three-dimensionally engraving a three-dimensional pattern such that a contour of the three-dimensional pattern is aligned with the first capacitive electrode.

The method may further comprise:

-injecting a transparent region onto the second layer on the opposite side of the first layer, the transparent region being capable of guiding light emitted by the third light source, an

-injecting a reflective interface to form a third layer, the transparent area being covered by the reflective interface.

According to another aspect, a vehicle comprising a display device as described above is proposed.

Drawings

Other features, details, and advantages will become apparent upon reading the following detailed description and analyzing the accompanying drawings, in which:

fig. 1 illustrates an exemplary embodiment of a display device.

Fig. 2 illustrates another exemplary embodiment of a display device.

Fig. 3A, 3B, 3C, 3D show a series of steps in a method for manufacturing a display device.

Detailed Description

The same reference numbers in various drawings identify the same or similar elements. For purposes of clarity, only those elements that are helpful in understanding the described embodiments are illustrated in the drawings and are described in detail below.

In the following description, when referring to absolute positional limitations, such as the terms "front", "back", "upper", "lower", "left", "right", etc., or relative limitations, such as the terms "above", "below", "upper", "lower", etc., or orientation limitations, such as "horizontal", "vertical", etc., these are the directions of reference unless otherwise specified.

Fig. 1 shows a schematic representation of a display device 10 for a vehicle, in particular for a motor vehicle, in a sectional view. The display device 10 is intended to be fixed in the passenger compartment of a vehicle, in particular on an armrest, an instrument panel or a door panel of a vehicle.

The display device 10 here comprises a display interface 12 which is visible to the user. The display device 10 is associated with a set of control components, for example in the form of touch-sensitive buttons.

Display interface 12 allows a user to view graphics. For example, the figures correspond to an indicator light for opening a vehicle door, or a seat adjustment indicator light or an air conditioning control indicator light. For example, when the door is open, the open door indicator lamp is lit in green, and when the door is closed, the open door indicator lamp is lit in red. According to another example, the indicator light is lit in red, for example, only when the door is closed. Thus, in this example, several information items are displayed using the same graphic, i.e., a "door closed" state or a "door open" state.

The display device of fig. 1 has a first layer 20 and a second layer 30.

The first layer 20 includes the display interface 12. The display interface 12 is the surface of the device that is in contact with the user.

The first layer 20 is divided into a first level 21 and a second level 23. The first tier 21 is in contact with the second tier 30, and the second tier 23 is disposed above the first tier 21 in contact with the display interface 12.

The first layer 20 also includes at least one first three-dimensional graphic 22. The three-dimensional graphic 22 is a three-dimensional graphic representation (or icon) located within the first layer 20, in other words, within the body of the first layer 20. The three-dimensional graphic 22 may be laser engraved into the first layer 20 of material thereof. The first three-dimensional graphic 22 is then visible from the display interface 12, and the continuity of the surface is uninterrupted while disposed at a depth within the first layer 20. The example of fig. 1 shows two first three-dimensional graphics 22. However, the first layer 20 may include one or more first three-dimensional graphics 22 while leaving the description unchanged. In the example of fig. 1 and 2, the first three-dimensional graphic 22 is arranged in a first level 21 of the first layer 20.

Further, the first layer 20 is transparent or translucent such that the first three-dimensional graphic 22 is visible to a user. "transparent" is understood to mean that the first layer 20 allows light to pass through such that the first three-dimensional graphic 22 is clearly visible through the first layer 20. The first layer 20 is made of PMMA (polymethyl methacrylate) or polycarbonate, for example.

The second level 23 also comprises at least one three-dimensional figure, hereinafter referred to as second three-dimensional figure 24. The second three-dimensional graphic 24 is also viewable from the display interface 12. The first three-dimensional graphic 22 and the second three-dimensional graphic 24 do not overlap. More specifically, the first three-dimensional graphic 22 and the second three-dimensional graphic 24 are vertically offset from one another such that each graphic is separately displayed on the display interface 12.

The first level 21 and the second level 23 are separated by a mask 19. The mask 19 is preferably an opaque film that does not allow light to pass through so that the first or second three-dimensional pattern can be selectively illuminated. In addition, the opaque film 19 is discontinuous, e.g., perforated, at the first three-dimensional graphic 22 so that the graphics are visible from the display interface 12. The opaque film 19 may be attached with a decorative film 18 (fig. 2) arranged on the second layer 23 side.

In the example shown in fig. 1 and 2, the second layer 30 is adjacent to the first layer 20. More specifically, the second layer 30 is disposed below the first layer 20. The second layer 30 is more specifically opposite the display interface 12. In the example of fig. 1, the second layer 30 includes a first face 38 and a second face 39 opposite the first face 38, the first face 38 facing the first layer 20.

The second layer 30 is an initially transparent electronic layer that is added with the necessary electronic components for illuminating the pattern. In particular, the second layer 30 includes one or more first light sources 32. The second layer 30 may also include one or more capacitive electrodes 50 and one or more planar patterns 34. Further, the second layer 30 may include a second light source 36. When the second layer 30 is not illuminated, it is opaque, meaning that the appearance is uniform without illumination.

As shown in fig. 1 or 2, the second layer 30 has a horizontal "L" shape, i.e. the end 31 of the second layer 30 is perpendicular to the rest of the layer. However, the arrangement of the end 31 is not limited to a right angle: the end portion may form an angle of between 0 ° and 180 °, for example in the range 45 ° to 135 °, with the rest of the second layer 30. Alternatively, the end portion 31 is not integral with the second layer 30 and therefore forms another electron shell than the second layer 30.

The end portion 31 comprises a first light source 32 and, where appropriate, a second light source 36. The

first light sources

32, 36 are arranged on the first face 38 such that the first light source 32 emits light through a first level of the first layer 20 to illuminate the outline of the first three-dimensional graphic 22 and such that the second light source 36 emits light through a second level 23 of the first layer 20 to illuminate the outline of the second three-dimensional graphic 24. These

light sources

32, 36 constitute side illumination for illuminating the three-

dimensional graphics

22, 24, but not the planar graphics 34. Side illumination may be understood to mean that the first light source 32, the second light source 36 are disposed at an angular offset relative to the third light source 60, as will be described in further detail below in this specification. In particular, the angular offset is measured with respect to the direction N of the planar figure 34. For example, the first light source 32 and the third light source 60 are arranged perpendicular to each other, and thus the first light source 32 forms an angle of N90 ° with respect to the normal direction. The angular offset depends inter alia on the angle formed by the end portion 31 and the rest of the second layer 30. The association of the side illumination from the first light source 32 and the vertical illumination from the third light source 60 provides a three-dimensional visual effect to the first three-dimensional graphic 22.

The example of fig. 1 shows two planar patterns 34. However, the second layer 30 may include one or more planar graphics 34 while keeping the description unchanged.

Each planar graphic 34 corresponds to a two-dimensional projection of a first three-dimensional graphic 22 present in the first layer 20. More precisely, the planar graphic 34 is vertically aligned under the first three-dimensional graphic 22 such that the planar graphic 34 corresponds to the outline of the three-dimensional graphic 22 in the vertical direction. "perpendicular" is understood to mean in the direction of the normal N of the plane figure 34. The planar graphic 34 is covered by a layer of ink that may be invisible when not illuminated by a light source and visible when illuminated by a light source.

Fig. 1 shows that the planar pattern 34 is disposed on a first side 38 of the second layer 30 that is in contact with the first layer 20. While avoiding the planar pattern 34, the black film 35 is also disposed on the first face 38. The black film 35 serves as a mask to allow light emitted from the third light source 60 to pass through the second layer 30 only via the planar pattern 34. In other words, the black film 35 functions as a light barrier so that light can pass through the second layer 30 only via the planar patterns 34. Alternatively, the planar pattern 34 and the black film 35 may be disposed on the second side 39 of the second layer 30.

The circuit board constituting the second layer 30 includes components assembled on its Surface by solder paste or conductive paste (called "Surface Mount Devices" or SMDs), which makes it possible to place the components on both sides of the circuit board.

The first light source 32 is disposed on the first face 38. The first light source 32 is for example a light emitting diode or LED. The first light source 32 illuminates the first three-dimensional graphic 22 vertically above the planar graphic 34.

The third light source 60 may be arranged, for example, in direct contact with the planar pattern 34 in the case of monochromatic illumination of the planar pattern 34. In the case of multicolor illumination, the third light source 60 may also be arranged in direct contact with the planar pattern 34, provided that it is equipped with a controller for a plurality of colors (for example of the RGB type "red, green, blue"). However, in the case of multi-color illumination, it is preferred to arrange some third light sources on the opposite face 39 (fig. 2), each light source providing a single color. For example, one of the third light sources is green light and the other of the third light sources is red light, which allows for example to illuminate the figure alternately with green or red or with green and red simultaneously to obtain yellow.

As shown in fig. 2, the second layer 30 may further include a capacitive electrode 50. Capacitive electrodes 50 enable illumination of particular graphics in response to tactile contact on display interface 12 associated with touch sensitive film 52. For example, the user places his or her finger on the display interface 12, above the first three-dimensional graphic 22, which illuminates the graphic.

The capacitive electrodes are disposed, for example, on a second side 39 of the second layer 30 in vertical alignment with the three-dimensional pattern 22 and the planar pattern 34. Alternatively, capacitive electrode 50 and planar pattern 34 are coincident and disposed on the same face (first face 38 or opposing face 39).

Fig. 2 shows two capacitive electrodes 50, each associated with a different three-dimensional graphic 22. However, the display device 10 may include a plurality of capacitive electrodes 50 without departing from the scope of the present invention.

In fig. 2, the display device further comprises a third layer 40. The third layer 40 is opposite the first layer 20 and is separated from the first layer 20 by the second layer 30, the third layer 40 being adjacent to the second layer 30. As shown in fig. 2, the third layer 40 thus faces the second face 39 of the second layer 30, which is opposite to the first face 38 of the second layer 30 facing the first layer 20. Thus, the display device comprises the following stacked layers: a first layer 20, a second layer 30, and a third layer 40. The third layer 40 includes a reflective interface 44 defining a transparent region 42.

The transparent area 42 is an area that allows the light provided by the third light source 60 to be properly directed to the planar pattern 34. The transparent area 42 may be air, or a transparent or translucent material, such as polycarbonate or polymethylmethacrylate, to allow light to be uniformly transmitted through the pattern. For example, when multiple light sources 60 are used to illuminate a graphic (each light source emitting a different color of light), the transparent region 42 is used. In this case, the transparent area 42 is in contact with the second layer 30, in particular with the planar pattern 34 and the third light source 32 for illuminating the pattern. In the example shown in fig. 1, the second layer 30 comprises four third light sources 60 arranged in pairs (in other words, two third light sources 60 are arranged near one planar pattern 24 and two other third light sources 60 are arranged near another planar pattern 24 different from the first planar pattern 24), and the third layer 40 comprises two transparent area units 42, each of the two transparent area units 42 being arranged in contact with a respective pair of third light sources 60 and a respective planar pattern 34. Then, the light emitted by the third light source 60 remains concentrated in the transparent area unit 42 so as to face the planar pattern 24 to illuminate it.

A reflective interface 44 is further disposed about the transparent region 42. In particular, the reflective interface 44 surrounds the transparent region 42 so as to concentrate (or concentrate) the light emitted by the third light source 60 within the transparent region 42. In other words, the reflective interface 44 limits the propagation of light outside the transparent region 42 by providing a physical barrier to light. To this end, the reflective interface 44 has a light reflectance or reflectivity greater than 80%. Reflectivity is here understood to mean the proportion of light reflected by the surface of the material. The higher the percentage of reflectivity, the less light the material allows to pass through. The reflective interface 44 may be a reflective coating, such as aluminum or silver, or a white material, such as polycarbonate, acrylonitrile-butadiene-styrene, or a polycarbonate/acrylonitrile-butadiene-styrene mixture, which contains additives that enable it to achieve a reflectivity at least equal to 80%. For illustrative purposes, an example of the operation of the display device is now described. Note, however, that the present invention is not limited to this example.

Initially, all three-dimensional graphics 24 of the second level 23 are illuminated in yellow by the second light source 34. In one configuration, the three-dimensional graphics 24 of the second level 23 are arranged to form a layer of graphics, e.g., in large numbers and in close proximity to each other.

For example, the three-dimensional graphics 22 of the first level are all illuminated in red by the first light source 32.

The user places a finger on the interface 12 at one of the first three-dimensional graphics 22 (e.g., representing a door, camera, or window in the form of an icon). The user activates a command linked to the icon (e.g. activates the standby camera) via the second electronic layer 30, which causes the icon to change colour. Thus, the original red sleep icon changes to green.

As shown in fig. 3A-3D, a method for manufacturing the display device 10 will now be described. In a first step (fig. 3A), a second electron shell 30 is provided, comprising at least a first light source 32, a third light source 60 and a capacitive electrode 50. Then, the first semitransparent layer 20 is implanted onto the second layer 30 (fig. 3B). During the injection, an opaque film 19 may be provided.

The next stage (fig. 3C) comprises injecting into the second layer 30, on the opposite side of the first layer 20, in other words on the side of the third light source 60, a transparent area 42 suitable for guiding the light emitted by the third light source 60 through the planar pattern 34. Note that this implantation step may alternatively be performed prior to implanting the first layer 20 into the second layer 30.

After providing the transparent area 42, the third layer 40 is molded around the transparent area 42 such that the transparent area 42 is covered by the third layer 40.

After the implantation of the first layer 20, the three-dimensional pattern 22, 24 (fig. 3D) is laser etched in the first layer 20 so that the profile of the three-dimensional pattern is aligned with the light emitted by the third light source 60.

The method is also applicable to a display device comprising a plurality of first, second and third

light sources

32, 36, 60 and a plurality of planar patterns 34 and three-

dimensional patterns

22, 24.

Claims

1. Display device (10) for a vehicle, in which:

-a first transparent or translucent layer (20) comprising at least one first three-dimensional figure (22);

-a second electronic layer (30) comprising a first light source (32) and at least one first capacitive electrode (50), said first light source (32) being configured to illuminate a first three-dimensional figure (22), the outline of the first three-dimensional figure (22) being aligned with the capacitive electrode (50) in a direction (N) perpendicular to said three-dimensional figure (22);

wherein the first light source (32) is arranged angularly offset from the first capacitive electrode (50).

2. The display device (10) of claim 1, wherein the first layer (20) comprises:

-a first level (21) comprising a first three-dimensional figure (22), and

a second level (23) comprising at least one second three-dimensional figure (24),

the second electronics layer (30) further includes a second light source (36), the second light source (36) configured to illuminate a second three-dimensional graphic (24).

3. The display device (10) of claim 2, wherein the first layer (20) comprises a touch sensitive film (52), the touch sensitive film (52) for activating at least one of the first light source (32) and the second light source (36) by tactile contact of the touch sensitive film (52) in line with a capacitive electrode (50).

4. The display device according to claim 2, wherein the first light source (32) and the second light source (36) are arranged parallel to each other such that the first light source (32) illuminates a first three-dimensional graphic (22) and not a second three-dimensional graphic (24), and such that the second light source (36) illuminates the second three-dimensional graphic (24).

5. A display device as claimed in claim 4, characterised in that the second light source (36) illuminates the second three-dimensional figure (24) without illuminating the first three-dimensional figure (22).

6. The display device (10) of claim 1, further comprising a third layer (40) facing a second side (39) of the second layer (30), the second side being opposite to the first side (38) of the second layer (30), the first side (38) facing the first layer (20), the second layer (30) further comprising at least one planar pattern (34) and a third light source (60) directed towards the third layer (40), the planar pattern (34) corresponding to a two-dimensional projection of the first three-dimensional pattern (22), the third light source (60) being shaped to illuminate the planar pattern (34) and the three-dimensional pattern (22).

7. A display device (10) according to claim 6, characterized in that the third layer (40) is shaped to guide light emitted by the third light source (60) through a planar pattern (34).

8. The display device (10) of claim 7, wherein the third layer (40) comprises a reflective interface (44) surrounding a transparent region (42).

9. The display device (10) of claim 8, wherein the reflective interface (44) has a reflectivity greater than 80%.

10. The display device (10) according to claim 6, wherein the first light source (32) is arranged perpendicular to the third light source (60) around a three-dimensional figure (22).

11. A display device (10) according to claim 6, wherein at least two third light sources (60) are shaped to illuminate the same planar pattern (34) and the associated first three-dimensional pattern (22).

12. Method for manufacturing a display device (10) according to claim 1, comprising:

-providing an electron shell (30), called "second shell", comprising a first light source (32) and at least one first capacitive electrode (50),

-injecting a first translucent or transparent layer (20) onto the second layer (30), and

-laser three-dimensionally engraving a three-dimensional pattern (22) in the first layer (20) such that a contour of the three-dimensional pattern (22) is aligned with the first capacitive electrode (50).

13. Method for manufacturing a display device according to claim 12, wherein the display device (10) is a display device according to claim 1.

14. The method for manufacturing a display device (10) according to claim 12, comprising:

-injecting a transparent area (42) onto the second layer (30) on the opposite side of the first layer (20), said transparent area being capable of guiding the light emitted by said third light source (60), and

-injecting a reflective interface (44) to form a third layer (40), the transparent area (42) being covered by the reflective interface (44).

15. A vehicle comprising a display device according to any one of claims 1 to 11.