COMPONENT WITH ELECTRICAL FUNCTIONAL ELEMENTS FOR THE PRODUCTION OF A LAMINATED SHEET

Abstract

A component for the production of a laminated sheet, includes at least two electrical functional elements and cabling, which includes electrical conductors having insulating sheathing and connected in each case to an electrical functional element, wherein the cabling has a bundling section, in which all the electrical conductors are surrounded by a common insulating sheathing.

Claims

1. A component for the production of a laminated sheet, comprising at least two electrical functional elements and cabling, which comprises electrical conductors having insulating sheathing and connected in each case to an electrical functional element, wherein the cabling has a bundling section, in which all the electrical conductors are surrounded by common insulating sheathing.

2. The component according to claim 1, comprising at least one internal electrical functional element for incorporation into the laminated sheet.

3. The component according to claim 2, further comprising at least one external electrical functional element for external attachment to the laminated sheet.

4. The component according to claim 1, wherein the cabling includes, for each electrical functional element, an associated individual section, which is connected to the respective electrical functional element and in which the electrical conductor(s) of said functional element are surrounded by their own insulating sheathing, which surrounds no electrical conductor(s) of the other functional element(s).

5. The component according to claim 4, comprising at least three electrical functional elements, wherein the individual section of a functional element is connected to the bundling section and a partial bundling section, in which the electrical conductors of the other functional elements are surrounded by common insulating sheathing.

6. The component according to claim 4, wherein the external electrical functional element and/or the individual section of the external electrical functional element is provided with an adhesive.

7. The component according to claim 1, wherein the ends of conductors facing away from the functional elements are connected to at least one plug connector.

8. The component according to claim 1, wherein the electrical functional elements are implemented as sensors, transmitters, or electrical shielding elements.

9. The component according to claim 1, wherein the electrical conductors are implemented at least partially as flat conductors.

10. The component according to claim 1, wherein the cabling also includes electrical shields for decoupling the electrical conductors of various functional elements.

11. A method for producing a laminated sheet, comprising: (a) providing a first pane, a second pane, at least one thermoplastic film, and a component according to claim 1, (b) arranging the first pane and the second pane with the film therebetween flat atop one another to form a stack, wherein at least one electrical functional element of the component is arranged between the film and one of the first and second panes and wherein the bundling section is arranged outside the stack, (c) joining the first pane to the second pane via the film by lamination to form the laminated sheet.

12. The method according to claim 11, wherein the electrical functional elements are arranged such that the electrical functional elements overlap one another in the laminated sheet.

13. The method according to claim 11, wherein at least one electrical functional element of the component is attached with an adhesive to the surface of one of the panes facing away from the thermoplastic film.

14. The method according to claim 13, wherein the component comprises at least two internal electrical functional elements for incorporation into the laminated sheet and at least one external electrical functional element for external attachment to the laminated sheet, and wherein an internal functional element is arranged between the first pane and the film, an internal functional element between the second pane and the film and the external functional element with an adhesive on the surface of the second pane facing away from the film and wherein the functional element between the second pane and the film is implemented as an electrical shielding element for the electrical shielding of the other two functional elements.

15. A laminated sheet, equipped with a component according to claim 1.

16. The component according to claim 7, wherein ends of the conductors facing away from the functional elements are connected to a single common plug connector.

17. The component according to claim 8, wherein the electrical functional elements are implemented as rain sensors, light sensors, relative humidity sensors, temperature sensors, switch surfaces, light emitting diodes, image sensors, antennas, displays, heating elements, ultrasonic sensors, or electrical shielding elements.

Description

[0047] in the following, the invention is explained in greater detail with reference to drawings and exemplary embodiments. The drawings are a schematic representation and not to scale. The drawings in no way restrict the invention.

[0048] They depict:

[0049] FIG. 1 a plan view of an embodiment of the component according to the invention,

[0050] FIG. 2 a cross-section along A-A′ through the component of FIG. 1,

[0051] FIG. 3 a plan view of a laminated sheet equipped with a component according to the invention, and

[0052] FIG. 4 a cross-section along B-B′ through the laminated sheet of FIG. 3.

[0053] FIG. 1 depicts a schematic representation of an embodiment of the component E according to the invention for manufacturing a laminated sheet, in particular a windshield for a motor vehicle. The component includes three electrical functional elements 1, 2, 3. The first electrical functional element 1 is a capacitive rain sensor and is intended to be laminated as an internal functional element between the outer pane and the thermoplastic intermediate layer of a laminated sheet. The second functional element 2 is an electrical shielding element and is intended to be laminated as an internal functional element between the inner pane and the thermoplastic intermediate layer of the laminated sheet. The third functional element 3 is a moisture sensor and is provided to be attached as an external functional element on the interior-side surface of the inner pane. The second functional element 2 is intended, as a shielding element, to prevent interference, couplings (“crosstalk”) and other disturbances between the other two functional elements 1, 3.

[0054] In addition to the functional elements 1, 2, 3, the component includes cabling, comprising the electrical conductors connected to the functional elements 1, 2, 3 and their insulating sheathing 7. Three conductors 4.1, 4.2, 4.3 are connected to the first functional element 1; one conductor 5 is connected to the second functional element 2; and four conductors 6.1, 6.2, 6.3, 6.4 are connected to the third functional element 3. The conductors 4.1, 4.2, 4.3; 5; 6.1, 6.2, 6.3, 6.4 are formed from strips of a tinned copper foil as flat conductors.

[0055] The cabling of the component E is divided into various sections. It comprises a so-called bundling section G, in which the conductors 4.1, 4.2, 4.3; 5; 6.1, 6.2, 6.3, 6.4 of all the functional elements 1, 2, 3 are surrounded by common insulating sheathing 7. The bundling section G bundles, so to speak, the three functional elements 1, 2, 3 with their associated conductors 4.1, 4.2, 4.3; 5; 6.1, 6.2, 6.3, 6.4 to form a single component E. At the end of the bundling section G facing away from the functional elements 1, 2, 3, the conductors 4.1, 4.2, 4.3; 5; 6.1, 6.2, 6.3, 6.4 are equipped with a common plug connector S, with which the entire component E can be connected to the onboard electronic system of the vehicle.

[0056] Starting from the bundling section G, the cabling is branched into a so-called individual section I.3 of the third functional element 3 and a so-called partial bundling section T of the first and second functional element 1, 2. In the individual section I.3, only the conductors 6.1, 6.2, 6.3, 6.4 of the third functional element 3 are contained with insulating sheathing 7. The third functional element 3 is connected to the individual section I.3. In the partial bundling section T, the conductors 4.1, 4.2, 4.3, 5 of the first and second functional element 1, 2 are contained in common insulating sheathing 7. At the end of the partial bundling section T, the cabling is again branched into an individual section I.2 of the second functional element 2 and an individual section I.1 of the first functional element 1. In the individual section I.1, only the conductors 4.1, 4.2, 4.3 of the first functional element 1 are contained; and in the individual section I.2, only the conductor 5 of the second functional element 2, in each case with insulating sheathing 7.

[0057] The third functional element 3 and its individual section I.3 are provided with an adhesive 11 for easy attachment to the laminated sheet. As a result of the bundling of the three functional elements 1, 2, 3 to form a single component E, the production of the laminated sheet is substantially simplified. It is no longer necessary to position the functional elements individually in the composite and to attach them. Instead, only one component E, whose individual sections I.1, I.2, I.3 and whose partial bundling section T determine the arrangement of the functional elements 1, 2, 3 relative to one another, has to be dealt with. The individual sections I.1, I.2, I.3 and the partial bundling section T are dimensioned such that the functional elements 1, 2, 3 overlap in the laminated sheet, i.e., are arranged congruently.

[0058] FIG. 2 depicts a cross-section through the bundling section G of the component of FIG. 1. The electrical conductors 4.1, 4.2, 4.3 of the first functional element 1 are arranged in one plane next to one another (based on the width dimension of the plat conductor). Likewise, the electrical conductors 6.1, 6.2, 6.3, 6.4 of the third functional element 3 are arranged next to one another in one plane. The entirety of the conductors 4.1, 4.2, 4.3 and the entirety of the conductors 6.1, 6.2, 6.3, 6.4 are also arranged next to one another in the same plane. Arranged between the conductors 4.1, 4.2, 4.3, on the one hand, and the conductors 6.1, 6.2, 6.3, 6.4, on the other, is a shielding 9, which decouples the conductor groups.

[0059] The conductor 5 serves to ground the second functional element 2. It is arranged in a different plane above the conductors 4.1, 4.2, 4.3. Arranged between the conductor 5, on the one hand, and the conductors 4.1, 4.2, 4.3 is a shielding 8.1 for decoupling. A shielding 8.2 is also arranged below the conductors 4.1, 4.2, 4.3. The shieldings 8.1, 8.2 extend over the entire width of the conductors 4.1, 4.2, 4.3. The shieldings 8.1, 8.2 are preferably grounded via the plug connector S. The shielding 9 is preferably also grounded, either via the plug connector S as well or through a connection to the shieldings 8.1, 8.2 (not shown).

[0060] Arranged above and below the entirety of all the electrical conductors 4.1, 4.2, 4.3; 5; 6.1, 6.2, 6.3, 6.4 and the internal shieldings 8.1, 8.2, 9 are overall shieldings 10.1, 10.2, which extend over the total width of the conductors 4.1, 4.2, 4.3; 5; 6.1, 6.2, 6.3, 6.4 and internal shieldings 8.1, 8.2, 9. The overall shieldings 10.1, 10.2 serve for decoupling from external influences and are, in turn, preferably grounded via the plug connector S. All conductors and shieldings are encased in polymeric material that forms the insulating sheathing 7 and fills the intermediate spaces.

[0061] FIG. 3 depicts a laminated sheet W with the component E. The laminated sheet W is intended as a windshield of a motor vehicle and the component E is arranged outside the central field of vision, which is indicated by a dashed line. With the first functional element 1 (rain sensor), the presence of drops of water on the outer pane can be measured in order to automatically begin operation of the windshield wipers as a function thereof. With the third functional element 3 (moisture sensor), the relative humidity in the vehicle interior can be measured and, for example, the automatic climate control system can be adjusted thereto.

[0062] FIG. 4 depicts a cross-section through the laminated sheet W of FIG. 3. The laminated sheet W comprises an outer pane 12, an inner pane 13, and a thermoplastic film 14 arranged therebetween. For the sake of clarity, the components are shown spaced apart from one another such that the figure represents the layer stack before lamination rather than the finished windshield. The outer pane 12 and the inner pane 13 are made of soda lime glass and have a thickness of, for example, 2.1 mm. The film 14 is made of a plasticiser-containing PVB with a thickness of 0.76 mm.

[0063] The first functional element 1 is arranged between the outer pane 12 and the film 14; the second functional element 13, between the inner pane 13 and the film 14; and the third functional element 3, on the interior-side surface of inner pane 13 facing away from the outer pane 12 via the adhesive 11. The functional elements 1, 2, 3 are arranged overlappingly such that they are arranged in congruence when looking through the laminated sheet W.

LIST OF REFERENCE CHARACTERS

[0064] (E) component for the production of a laminated sheet

[0065] (1) first electrical functional element

[0066] (2) second electrical functional element

[0067] (3) third electrical functional element

[0068] (4.1), (4.2), (4.3) electrical conductors of the first electrical functional element 1

[0069] (5) electrical conductor of the second electrical functional element 2

[0070] (6.1), (6.2), (6.3), (6.4) electrical conductors of the third electrical functional element 3

[0071] (7) insulating sheathing

[0072] (8.1), (8.2) shielding between electrical conductors of different planes

[0073] (9) shielding between electrical conductors of the same plane

[0074] (10.1), (10.2) upper and lower overall shields

[0075] (11) adhesive

[0076] (G) bundling section of the cabling

[0077] (T) partial bundling section of the cabling

[0078] (1.1) individual section of the functional element 1

[0079] (1.2) individual section of the functional element 2

[0080] (1.3) individual section of the functional element 3

[0081] (S) plug connector

[0082] (W) laminated sheet

[0083] (12) first pane

[0084] (13 second pane

[0085] (14) thermoplastic film

[0086] A-A′ section line

[0087] B-B′ section line