ES2651454A2 - Inside lining part of illuminated vehicle (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Interior covering part (13) comprising a luminous layer (11) made of LEDs (8), which is assigned in the layer construction to a decorative layer (5, 15), in which the luminous layer (11) is arranged in the visible part above the decorative layer (5), and because it can not be seen through the decorative layer (5) when the luminous layer (11) is not activated. (Machine-translation by Google Translate, not legally binding)

Description

Interior lining part of illuminated vehicle

The object of the invention is an illuminated vehicle interior lining part according to the preamble of claim 1.

The interior lining parts of vehicles, such as instrument panels, armrests, door coverings and rear trays usually present

10 a decorative layer with a decorative material, thanks to which a given visual and tactile impression is given to the car interior trim.

This type of interior lining parts are mounted on land vehicles, aircraft and water vehicles.

In different places in the interior space of a vehicle an illumination or an illuminated interior lining piece is additionally desired, to achieve an aesthetic effect or to create orientation points.

20 An interior lining piece of illuminated vehicle of this type has been disclosed with DE 10 2014 103 938 A1. At least one organic light emitting diode (OLED) is integrated in this vehicle interior lining part, the surface structure of the interior lining part having the same surface structure as the adjacent visible part of the OLED. The decorative layer is in the visible part the

25 uppermost layer of the inner lining piece and is illuminated from behind by a luminous layer. Thus, the light layer is below the decorative layer.

When using LEDs, it is a disadvantage that they must be enclosed, so that they do not come in contact with air and humidity. Another disadvantage is

30 that the decorative layer must be lighted, which represents high requirements for optical characteristics. In addition, the selection of different decoration designs is strongly limited.

A process for the manufacture of printed LEDs is described with the

35 US 20150171289 A1. In this case, light-emitting diodes are printed on a thin support material.

The light emitting diodes can be made from tiny gallium nitride LEDs, and can be mixed with synthetic resin and binder or alternatively with a gel. With

40 This creates an ink in which the LEDs are scattered. The LEDs have a cross section smaller than 200 micrometers, in particular they have a cross section between 3 and 50 micrometers.

This ink can then be applied in a printing process, for example a

A screen printing process or a spray process on a substrate (for example polyester), which has a thin layer of conductive silver (preferably silver nanoparticles). This serves as an electrode for the current supply of the LED ink.

The silver layer, however, is not applied over the entire surface on the substrate not

driver, but in defined patterns, which are then in contact with the LEDs, that is, they can be linked electronically.

The substrate formed in this way has an interface protruding from the substrate, which serves for the current supply.

The printed material is then sealed with two layers of protection. When you put the voltage illuminate the LEDs. There is no known application of this procedure for an interior cladding piece.

10 Starting from document DE 10 2014 103 938 A1 and document US 20150171289 A1, an improved vehicle interior lining part and a corresponding procedure for the manufacture of such a vehicle interior liner part, which makes it possible to achieve a novel light effect on an interior lining piece with

15 indirect lighting.

The objective on which the invention is based is achieved by means of the characteristics of the independent claims. Preferred embodiments of the invention are indicated in the dependent claims.

A fundamental feature of the invention is that the luminous medium used is arranged as a transparent thin layer component between two conductive and transparent layers, and with it the decorative layer below the luminous medium can be seen. With this it is new that the decorative layer - seen from the visible part of the piece of

25 inner lining - is arranged below the surface light layer.

The lower conductive layer and the upper conductive layer correspond to a cathode electrode and an anode electrode, and serve for the current supply, that is, for the transmission of the electrical voltage and the supply of the LEDs found in the

30 conductive layer

The difference with the state of the art, therefore, is given because the decorative layer that is below the light arrangement can be seen with the light layer turned off. The light layer, therefore, does not obstruct in the off state, or only in a minor way

35 measure, the vision of the decorative layer.

The decorative layer serves the joint aesthetic impression, and as a consequence of the transparent light layer, it is visible when the light layer is not activated, that is, when the light layer does not radiate any light. The decorative layer can be shaped so

40 flexible, and preferably has a thickness of less than 4 mm.

The light layer comprises a transparent carrier layer containing the LEDs. This carrier layer may be flexibly shaped, and may have a thickness between 3 micrometers and 1 millimeter. Preferably, the carrier layer has a thickness between 50

45 micrometers and 200 micrometers. A transparent and flexible conductive sheet can be arranged on both sides of the carrier layer as an electrode.

The light layer can be partially shaped in a translucent way, thanks to which a special optical effect originates when the LEDs are activated.

The light layer can be placed, for example, on a textile surface, a shaped plastic or a perforated material, with a pattern as decoration. In particular, the light layer can be placed on an inner lining piece, for example on a

5 dashboard, a door cladding piece, a center console or on the roof of the vehicle.

As a consequence of the transparency of the conductive layers as electrodes, the decorative layer is visually equal in the visible part of the inner lining piece that

10 borders the space of the vehicle, since it is transparent to the light waves that act in visible light. This has the advantage that the very thin light layer is integrated into a vehicle interior lining piece of this type, it is not visible in the off state and without current, and only the decorative layer below can be seen, and This is included in the overall appearance of the vehicle.

The transparent light layer, which is formed by the support layer with the LEDs, the upper conductive layer, and the lower conductive layer, can be additionally provided with a transparent protective layer.

20 The transparent protective layer that directly limits the interior space of the vehicle serves to protect the decorative elements, in particular the illumination light, against scratches and ultraviolet radiation. As a consequence of the transparency, the decorative layer below the conductive layer can be seen through the light layer.

According to an embodiment of the invention, the structure of the surface of the protection layer comprises a gravel and / or a surface roughness that adapts to the interior design and is configured according to the wishes of the client.

In this way, instead of a rigid LED, a thin printed layer can be used, thanks to which mechanical flexibility is guaranteed and the lighting arrangement can be adapted to the mechanical surface constitution of the interior lining part of the vehicle. This, on the one hand, can yield flexibly when a mechanical pressure is applied, and on the other hand it can simply follow the curved conformation of the interior lining part of the vehicle.

35 The light arrangement, thus, can also be used in the case of curved surfaces of the interior lining part of the vehicle.

In another aspect, the invention relates to a process for manufacturing an interior lining part of a vehicle, in which the process comprises the following:

-

 Preparation of a bottom, which can be optimally sponged

-

 Bonding a decorative layer with the bottom by previously applying an adhesive layer on the bottom or / and on the decorative layer

-

 Application of a conductive transparent layer as a lower electrode

45 - Printing of an ink with scattered LEDs, which forms the carrier layer of the light layer

-

 Application of a conductive transparent layer as a top electrode

-

 Optionally, a transparent protective layer can be applied on the upper electrode.

The LEDs, in this way, can be sprayed, painted or printed so dispersed in an ink in the most different embodiments, and then form in the hardened state a carrier layer that is covered by another transparent conductive layer.

5 Preferably, the lower and upper transparent conductive layers are transparent plastic sheets with a transparent conductive surface, for example made of indium tin oxide (ITO), or a very thin metallic layer, for example made of silver. The lower transparent conductive layer, however, can also be sprayed, painted or printed

10 on the decorative layer. Similarly, the upper transparent conductive layer can be sprayed, painted or printed on the carrier surface containing the LEDs.

When there is no voltage on the LEDs, then these are not visible, since they are so small that they cannot be seen as individual pieces with the naked eye, and the light layer,

15 with it, it is transparent. With this, they are perceived as part of the ornament element.

A conductive sheet is usually glued with the decorative layer. For this, a transparent adhesive layer is placed on the decorative layer and / or on the sheet.

20 The bottom can be shaped to place the decorative element as an ornament element in different places of the vehicle. It serves for the protection of the decorative element against deformation as a result of a high calorific action, and closes the ornament element from the rear. In addition, the bottom may also have a fixing structure for the ornament element.

The invention is explained in the following from drawings. In this case, other fundamental characteristics and advantages for the invention are extracted from the drawings and their description.

It shows:

30 Figure 1: Decorative structure in a side view

Figure 2: Perspective view of the decorative structure

35 Figure 3: Perspective view of the illuminated inner lining part

Figure 4: Perspective view of an unlit interior lining piece

Figure 1 shows a light layer 11 as a thin film, which is formed by a layer

40 transverse 1, in which the individual LEDs 8 are housed as sources of light generation. In the upper part of the carrier layer 1 is a transparent conductive layer 2 that serves as an electrode. In the lower part of the carrier layer 1 there is also a transparent conductive layer 3 that serves as an electrode. The two conductive layers 3 and 4 thus form a cathode and an anode, and together with the

45 LEDs housed in the carrier layer the light layer 11.

The layer formed from the two transparent conductive layers 2, 3 and the carrier layer 1 is thus formed as a light layer 11, and can then be placed as a finished layer in the decorative layer.

In the extension of the conductive layers 3, 4 an interface 10 of the luminous layer protrudes

11. A switch not shown for the power supply is connected to it, which can be controlled through control signals.

5 The surface 4 is transparent and can be seen through it, and covers the light layer 11 with respect to the interior space of the vehicle 14. Between the surface 4 and the light layer 11 it can be placed, for example, optionally, a translucent layer For example, a transparent dispersion sheet can be introduced by gluing, to achieve an effect

10 luminous diffuse. The surface 4 is shaped as a transparent scratch resistant material.

The two conductive layers 3, 4 are practically completely transparent, since they contain only extremely thin metal threads, which are not visible to simple

15 view, or since they contain a transparent conductive layer, for example an ITO layer.

Since the magnitude of the LEDs that are in between are moving around the micrometers, they cannot be seen with the naked eye. Through the distribution of the small LEDs in the carrier layer a layer can be seen through the layer

20 decorative arranged behind the carrier layer.

Thanks to this, it is possible to look through the light layer 11 without cloudy appearance or optical distortion.

25 Below the light layer 11 is the decorative layer 5 covered by the light layer 11. In one embodiment, the decorative layer, the unlit decorative layer 15 of the inner lining piece 13 is optically adapted.

With this, an observer sees in the visual direction 16 through the surface 4 that forms the

30 protective layer and through the luminous surface 11, directly the decorative layer 5 that is below, which in its optical impression corresponds to the decorative layer 15 arranged next to it. With this, the two decorative layers 5, 15 optically overlap as long as the light layer 11 is not activated. The existence of the non-activated light layer, therefore, cannot be recognized, and does not impair the joint printing of the piece of

35 inner lining 13.

As a whole, this arrangement of layers forms the element 9, which can be introduced into an inner lining piece 13.

The decorative layer 5 is joined by means of the adhesive layer 7 with the bottom 6. Alternatively, the decorative layer 5 can be the bottom surface. This surface can be processed to achieve a decorative effect. In this embodiment, no adhesive layer is found between the bottom and the decorative layer.

45 Figure 2 shows the individual steps of the element 9. The transparent surface 4 is located above the transparent conductive layer 2, which together with the conductive layer 3 surrounds the carrier layer 1 with the LEDs inside. The two conductive layers 3 and 4 serve as cathode and anode for the power supply of the LEDs 8.

For a better visualization, the LEDs 8 are represented very augmented, although these cannot be recognized in reality.

5 The bottom 6 of the inner lining part 13 is arranged below the light layer 11.

Figure 3 shows an inner lining piece 13 with an element 9 inserted inside it, which extends centrally along the entire length of the piece of

10 inner lining 13.

In the state shown here, a current passes through the element 9, so that the luminous layer 11 is illuminated and clearly stands out with respect to the adjacent decorative layer 15 of the inner lining piece 13.

15 On the side surface 17 of the inner lining part 13, the element 9 inserted in the recess 18 can be recognized, the surface of which is level with the surface of the inner lining part 13. Thus a flat surface composed of the two Decorative layers 5, 15 is along the entire surface of the inner lining piece 13.

20 Below the light layer 11 you can see the decorative layer 5 of the element, which is optically adapted to the decorative layer 15 of the inner lining piece 13.

Below the decorative layer 15 of the inner lining piece 13 and outside of

25 the notch 18 is the back or bottom bottom 6 of the inner lining piece 13, which is preferably made of a spongy material. In the bottom 6, fixing means 12 are formed to fix the inner lining part 13 in the interior space of the vehicle.

30 Figure 4 shows the inner lining part 13 with the element 9 in the unlit state. As a consequence of the transparency of the light layer 11, an observer can look in the visual direction 16 directly on the decorative layer 5 that is below the light layer 11. The decorative layer 5, in this case, is identical to the decorative layer 15 of the inner lining piece 13. This gives rise to the impression that the

35 inner lining piece 13 is continuously provided with a uniform decorative layer. To show the mounting position of the element 9, it can still be recognized in its contour from Figure 4. In reality, the impression of an uninterrupted decorative surface of the inner lining piece 13 results.

40 LEGEND OF THE FIGURES

one.

Carrier layer

2.

Conductive layer

3.

Conductive layer

45 4. Surface

5.

Decorative layer (of 9)

6.

Background

7.

Adhesive layer

8.

LED

9.

Element

10.

Interface (of 2 and 3)

eleven.

Light layer

12.

Fixing medium

5 13. Interior lining piece

14.

Interior space of the vehicle

fifteen.

Decorative layer (of 13)

16.

Visual direction

17. Side surface (of 13) 10 18. Notch

Claims (8)

1. Interior lining piece (13) comprising a light layer (11) made of LEDs (8), which is assigned in the construction of layers to a decorative layer (5, 15), 5 characterized in that the light layer (11) is arranged in the visible part above the decorative layer (5) and because it cannot be seen through the decorative layer (5) when the light layer (11) is not activated. 2. Interior lining piece according to claim 1, characterized in that the light layer (11) is transparently shaped. 3. Interior lining piece according to claim 1 or 2, characterized in that the light layer (11) is formed free of turbidity and distortion. The inner lining part according to one of claims 1 to 3, characterized in that the light layer (11) is partially shaped in a translucent manner. 5. Interior lining part according to one of claims 1 to 4, 20 characterized in that the light layer (11) is formed by a transparent lower conductive layer (3) and a transparent upper conductive layer (2), between which a transparent carrier layer (1) containing the LEDs (8) is arranged. 6. Interior lining part according to one of claims 1 to 5, 25 characterized in that a transparent surface (4) is arranged as a protective layer above the light layer (11). 7. Interior lining part according to one of claims 1 to 6, characterized in that the decorative layer (5) below the light layer (11) is equal to one 30 decorative layer (15) of the surface of the inner lining piece (13), which does not have any light layer (11). 8. Procedure for the manufacture of an interior cladding piece (13) with a light layer (1), in which the process comprises the following 35 - Preparation of a background (6)

-

 Bonding a decorative layer (5) with the bottom (6) by previously applying an adhesive layer on the bottom or / and on the decorative layer

-

 Application of a transparent conductive layer (2) as a lower electrode on the layer

Decorative 40 - Printing a semiconductor ink with LEDs (8) scattered on the layer (2)

-

 Application of a transparent conductive layer (3) as a top electrode on the LEDs

(8) 9. Method according to claim 8, characterized in that a transparent surface (4) is applied on the upper electrode.