EP4497199A1 - Kapazitiver sensor und bedienelement mit integrierter beleuchtung - Google Patents
Kapazitiver sensor und bedienelement mit integrierter beleuchtungInfo
- Publication number
- EP4497199A1 EP4497199A1 EP24725429.5A EP24725429A EP4497199A1 EP 4497199 A1 EP4497199 A1 EP 4497199A1 EP 24725429 A EP24725429 A EP 24725429A EP 4497199 A1 EP4497199 A1 EP 4497199A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carrier plate
- section
- actuating
- capacitive sensor
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/965—Switches controlled by moving an element forming part of the switch
- H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/9607—Capacitive touch switches
- H03K2217/960755—Constructional details of capacitive touch and proximity switches
- H03K2217/96076—Constructional details of capacitive touch and proximity switches with spring electrode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/965—Switches controlled by moving an element forming part of the switch
- H03K2217/9651—Switches controlled by moving an element forming part of the switch the moving element acting on a force, e.g. pressure sensitive element
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/965—Switches controlled by moving an element forming part of the switch
- H03K2217/9653—Switches controlled by moving an element forming part of the switch with illumination
Definitions
- the invention relates to a capacitive sensor or a capacitive force sensor with integrated lighting as well as an operating element with such a capacitive sensor and integrated lighting.
- control elements A large number of control elements and capacitive sensors are known from the state of the art as control elements. If the operating surfaces of the control elements are to be illuminated, as is often desired in motor vehicles, for example, it is currently usually planned to provide a light element separately from the sensor or adjacent to the sensor on a common carrier.
- the invention is therefore based on the object of overcoming the aforementioned disadvantages and of providing a capacitive sensor or an operating element with such a sensor, which can be illuminated with little installation space required.
- the senor has a carrier plate and a sensor element slidably mounted on the carrier plate, as well as a measuring electrode.
- the sensor element has a connection section mounted on the carrier plate and an actuating section that can be moved relative to the carrier plate along a predetermined actuating direction.
- the connection section is preferably stationary relative to the carrier plate and in particular fixed to it, whereas the actuating section is movable or displaceable, for example, parallel and in particular orthogonal to the carrier plate.
- the actuating section has an actuating surface for receiving a force acting in the actuating direction and in particular applied by or by means of a force transmission element, which can also be referred to as an actuating force.
- the sensor also has a measuring electrode which is provided on the carrier plate and serves to detect a displacement of the actuating section and to determine a force acting on the actuating section which leads to the displacement.
- the capacitive sensor has a light element provided on the carrier plate, which is preferably arranged together with the sensor element on a common side of the carrier plate and/or is fixed to it.
- the light element which is in particular an LED and further in particular a top-emitting LED, is also designed to emit light in the actuation direction, wherein this can be guided directly or, for example, via a light guide element in the actuation direction to an illuminable field explained below.
- the actuation section has a recess arranged in particular centrally or centrally in the actuation section, through which the light element extends and/or through which light can be emitted by the light element in the actuation direction, so that the light element can be arranged in a partial area delimited by the actuation section or generally by the sensor element on a surface of the carrier plate.
- the lighting element cannot be arranged adjacent to the sensor, but rather integrated into the area occupied by the sensor element on the carrier plate, the required installation space is greatly reduced or optimized.
- luminous element Although only one luminous element is mentioned, several luminous elements or one luminous element which is designed to emit light in different colors can also be arranged according to the invention so as to pass through the recess and/or emit light through the recess.
- the carrier plate has a first side on which the sensor element is arranged and/or fixed and the connection section of the sensor element is mounted and the light element is fixed.
- the carrier plate can have a second side which is preferably opposite the first side and on which the measuring electrode is arranged and/or fixed opposite the sensor element and the lighting element.
- the sensor element, the lighting means and the measuring electrode overlap in a plan view of the carrier plate, wherein the area required for the components is determined exclusively by the sensor element and/or the measuring electrode, but not by the lighting means.
- connection section and/or a mounting section of the carrier plate defines or limits a partial area on a surface, i.e. on the first side of the carrier plate, at least in sections and in particular completely, on or in which the lighting element is arranged and/or fixed.
- the connection section can, for example, be ring-shaped or generally encircle the partial area with a closed contour.
- connection section can also have other shapes and, for example, can also be formed from two or more parts, which can in particular be arranged evenly distributed around the partial area.
- the sensor element can also have at least one spring section that enables and determines the displacement, by which the connection section and the actuation section are connected.
- the shape of the at least one spring section can be used to determine in particular the displacement or the force required for a displacement as well as the displacement path along which the actuation section of the sensor element can be displaced by the actuation force. If a force is introduced into the sensor element via the actuation section or the actuation surface, the sensor element can be supported on the carrier plate via the connection section and can exert a force via the at least one spring section. provide a spring force that counteracts the actuating force, so that the displacement of the actuating section is determined.
- the displacement of the actuating section in turn leads to a change in an electrical field that can be provided by the measuring electrode, which in turn can be detected and thus evaluated at the measuring electrode, so that the displacement and the actuating force leading to the displacement can be determined from the change in the electrical field.
- connection section runs around the actuating section at least in sections and in particular completely, in particular in a plan view of the carrier plate.
- the sensor element is designed in particular as a single piece and preferably as a stamped and bent part.
- the carrier plate can be a circuit board or a layer of a multilayer circuit board.
- the carrier plate can also be rigid or flexible.
- An advantageous embodiment also provides that the carrier plate has a mounting section, in particular designed as a soldering surface, for fixing or surface mounting the connection section of the sensor element, i.e. for fixing the sensor element to the carrier plate.
- conductor tracks for electrically contacting the sensor element and/or the sensor electrode and/or the light element on the carrier plate can be arranged, formed and/or integrated into the carrier plate, for example by means of printing or etching technology and for example in multilayer, thin-film or thick-film technology.
- the measuring electrode is preferably a coil body, which can be arranged on the carrier plate or, in the case of a multilayer circuit board, between two layers.
- the coil body For example, it can also be formed by conductor tracks produced by means of printing or etching technology, which can be integrated directly into the layer or into the circuit board.
- the light element requires a conductor track for each connection of the light element to provide power or control the respective connection.
- two conductor tracks are required for a simple light element with two connections.
- the conductor tracks for contacting the light element can extend from outside the delimited partial area into it or enable an electrical connection to the light element arranged within the partial area.
- a first conductor track is formed integrally with the mounting section for the sensor element, so that the conductor track does not have to bypass the mounting section and a simple structure results.
- the conductor tracks or a second conductor track can, for example, be formed in two parts and extend with the two parts up to the mounting section, wherein the two parts can be connected to one another for bridging the mounting section, for example via bonding, i.e. via a wire or through the carrier plate and in particular by a conductor track section which is formed within the carrier plate, on an opposite side of the carrier plate or, in the case of a multi-layer circuit board, on another layer of the circuit board.
- the actuating section can be designed as a substantially planar body, which can have, for example, a rectangular, square, round or oval outer contour, ie contour in plan view. The displacement of such a body can be detected by the measuring electrode or has a measurable effect on an electric field provided by the measuring electrode.
- the actuating section in an unactuated state, in which the actuating section is not subjected to the actuating force in contrast to an actuated state, can be spaced apart from the carrier plate and/or the connecting section in the actuation direction and can therefore be displaced in accordance with the spacing during actuation to the connecting section or to the carrier plate.
- the distance preferably determines the maximum displacement path, wherein the distance can additionally or alternatively be smaller than the overall height of the lighting element, so that it passes through the actuating section through the recess both in the actuated and in the unactuated state.
- the actuating section or the entire sensor element can also be designed as a snap disk in order to provide the operator with haptic feedback when actuating, i.e. when applying force.
- the recess is, for example, a substantially oval, circular or square hole with a closed contour or generally has a closed contour.
- the shape of the recess can correspond to an outer contour of the light element, i.e. have a contour which corresponds to the outer contour of the light element or is slightly larger than it, so that an area provided by the actuating section is only minimally reduced by the recess. is, whereby the influence of the electric field by the recess is only minimally changed.
- the size of the recess is selected such that there is no contact between the light element and the actuating section during a proper movement or displacement of the actuating section.
- the actuating surface to which the actuating force can be applied preferably borders directly on the recess.
- the capacitive sensor has control electronics which are arranged on the carrier plate and/or are in signal contact with the measuring electrode and are designed to determine a force acting on the actuating section and leading to the displacement from the displacement of the actuating section detected by the measuring electrode.
- the control electronics can additionally or alternatively be designed to control the light element depending on an external control signal and/or depending on the displacement of the actuating section and/or the force acting on the actuating section.
- properties of the sensor element can be stored in the control electronics or the properties of the sensor element can be retrieved from the control electronics.
- control electronics can, for example, be designed to cause the lighting element to emit light for a predetermined period of time when a certain force or a certain displacement is applied, so that the mandatory need for external control is eliminated.
- the external control signal can be used to control the light element, which can be controlled via a provided control contact or via a BUS line to the control electronics.
- a control contact for controlling the light element can, for example, be integrated into a common connection of the sensor together with other contacts for supplying power to the sensor and/or for transmitting the displacement and/or force detected or determined by the control electronics.
- a further aspect of the invention relates to an operating element with a capacitive sensor according to the invention.
- the operating element has a button for receiving a force that can be applied by an operator, which has an illuminated field.
- the operating element also has a force transmission element that rests on the actuating surface of the sensor element and is designed to transmit the force that can be applied by the operator to the button from the button to the sensor element.
- the operating element provides that a light guide covering the recess of the actuating section is arranged within the force transmission element, which light guide is designed to guide light emitted by the lighting element to the illuminable field.
- the force transmission element can be designed integrally as a light guide covering the recess of the actuating section, which light guide is designed to guide light emitted by the lighting element to the illuminable field.
- the illuminable field and/or the entire key in particular can be designed as a diffuser and/or a diffuser can be arranged between the lighting element and the key, so that the light is scattered by the diffuser.
- the illuminable field or diffuser may also have the shape of a symbol or pictogram or be designed as such.
- the features disclosed above can be combined as desired, as long as this is technically possible and they do not contradict each other.
- Fig. 1 shows a capacitive sensor in partial section
- Fig. 2 shows a sensor element of a capacitive sensor
- Fig. 3 is a plan view of a carrier plate of a capacitive sensor
- Fig. 4 shows an operating element in an unactuated state in a side sectional view
- Fig. 5 the control element in an actuated state in a side sectional view.
- Figure 1 shows a partial section of a capacitive sensor 1, in which a sensor element 20 is fixed to a first side 11 of a carrier plate 10 on a mounting section 14 designed as a soldering surface and a measuring electrode 30 is arranged on an opposite second side 12 of the carrier plate 10, which is designed to provide an electric field and to detect a change in the electric field through the sensor element 20.
- the sensor element 20 has a connection section 21 which is fixed to the mounting section 14, an actuating section 22 and several Spring sections 23, which enable mobility or displacement of the actuating section 22 relative to the connecting section 21. Furthermore, the spring sections 23 provide a spring force which acts as a counterforce to a force K acting on the actuating surface 24 in the actuation direction R, so that the spring sections 23 preferably determine together with the actuating section 22 which force K is necessary for a specific displacement of the actuating section 22 along the actuation direction R.
- the carrier plate 10 also forms a layer 10 of a multilayer printed circuit board, which has a further layer 82, so that the measuring electrode 30 is sandwiched between the layers 10, 82 and protected.
- connection section 21 of the sensor element 20 or the mounting section 14 on the first side 11 or the surface 11 of the carrier plate 10 delimits a partial area 13 and from the surrounding surface 11, wherein the actuating section 22 is held movably adjacent to this partial area 13 and a lighting element 40 is fixed to the carrier plate 10 in the partial area 13 so that the lighting element 40 can emit light in or along the actuation direction R.
- the actuating section 22 forms a recess 25 within which the lighting element 40 is arranged as seen in a plan view so that the light emitted by the lighting element 40 can be emitted through the recess 25.
- the illuminant no longer has to be arranged adjacent to the surface 11 of the carrier plate 10 but outside the partial surface 13, but can be placed directly and with a corresponding reduction in installation space in the capacitive sensor 1 or fixed to the area delimited by the sensor element 20 on the carrier plate 10.
- the sensor element 20, as used for example in the capacitive sensor 1 according to Figure 1, is shown in a top view, i.e. in a view along the actuation direction R.
- the present sensor element differs from similar or known sensor elements in particular in that a recess 25 is provided in the actuation section 22, as shown, which in the present case has a circular, closed contour, so that the light element 40 can be arranged within this contour or recess 25 and light can pass through the actuation section 22.
- An actuating surface 24 for absorbing the force K acting in the actuating direction R extends radially inward directly to the recess 25, so that the force K can continue to be transmitted over as large an area as possible to the sensor element 20 and cause a displacement of the actuating section 22.
- Figure 3 shows a carrier plate 10 in a plan view, whereby the structure shown there or the features according to Figure 3 could also be used for a capacitive sensor 1 as shown in Figure 1.
- a mounting section 14 corresponding to the connection section 21 is formed on the first side 11 or the surface 11 of the carrier plate 10, which delimits a partial area 13 of the surface 11 from the surrounding areas.
- the partial area 13 can be completely delimited as shown or can also have a connection to the surrounding areas in sections.
- the light element 40 is fixed on the carrier plate 10 and electrically connected to two conductor tracks 15, 16 for controlling the Light element 40 is contacted.
- a first conductor track 15 is formed integrally with the mounting section 14, so that the light element 40 is electrically contacted with control electronics 50 provided on the carrier plate 10 via the first conductor track 15 and the mounting section 14.
- a second conductor track 16 comprises two sections or parts, of which a first part within the partial area 13 is contacted with the light element 40 and a second part outside the partial area 13 is contacted with the control electronics 50. The two parts of the second conductor track 16 in turn bridge the mounting section 14 and are connected to one another, for example in a further layer of a circuit board comprising the carrier plate 10 or by bonding via a wire.
- both conductor tracks 15, 16 can be formed according to the second conductor track 16 or can be led out of the partial area 13 on the second side 12.
- Figures 4 and 5 show an operating element 2 with a capacitive sensor 1 according to Figure 1, wherein Figure 4 shows the operating element 2 or the sensor 1 in an unactuated state in which no force K acts on the sensor element 20 of the sensor 1, and Figure 5 shows the operating element 2 or the sensor 1 in an actuated state in which a force K that can be applied by an operator acts on the sensor element 20 of the sensor 1.
- the operating element 2 comprises in particular a button 60 with an illuminable field 61 and a force transmission element 70, which is arranged between the button 60 and the sensor element 20 and rests on the actuating surface 24 of the actuating section 22.
- the actuating section 22 Since the button 60 in Figure 4 is not subjected to pressure or force K, the actuating section 22 has a first distance A1 to the surface 11 or the first side 11 of the carrier plate 10, so that the The electric field provided by the measuring electrode 30 is in a first state or is essentially unaffected.
- the force K is transmitted via the force transmission element 70 to the actuating surface 24 or the actuating section 22, whereby the latter is displaced along the actuation direction R towards the surface 11 or the first side 11 of the carrier plate 10, i.e. the first distance A1 is reduced towards the second distance A2 and the electric field is influenced, which can be detected by the measuring electrode 30 and in particular evaluated by the control electronics 50 to determine the force K and/or the displacement.
- the displacement is accordingly the change from the first distance A1 to the second distance A2.
- control electronics 50 can not only evaluate the signals transmitted by the measuring electrode 30 to determine the displacement and the force K leading to the displacement.
- the control electronics 50 can also control the lighting element 40, wherein the control of the lighting element 40 by the control electronics 50 can be based on an external control signal and/or on the displacement of the actuating section 22 or the force K acting on the actuating section 22. If the lighting element 40 is, for example, controlled to emit a light L as soon as and as long as the force K exceeds a predetermined limit value, an external control signal can be omitted, which significantly simplifies the control of the operating element 2.
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023112404.8A DE102023112404A1 (de) | 2023-05-11 | 2023-05-11 | Kapazitiver Sensor und Bedienelement mit integrierter Beleuchtung |
| PCT/EP2024/062603 WO2024231399A1 (de) | 2023-05-11 | 2024-05-07 | Kapazitiver sensor und bedienelement mit integrierter beleuchtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4497199A1 true EP4497199A1 (de) | 2025-01-29 |
Family
ID=91076586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24725429.5A Pending EP4497199A1 (de) | 2023-05-11 | 2024-05-07 | Kapazitiver sensor und bedienelement mit integrierter beleuchtung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4497199A1 (de) |
| CN (1) | CN119318115A (de) |
| DE (1) | DE102023112404A1 (de) |
| WO (1) | WO2024231399A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE216541T1 (de) * | 1997-02-17 | 2002-05-15 | Ego Elektro Geraetebau Gmbh | Berührungsschalter mit sensortaste |
| DE102008047325A1 (de) * | 2008-09-10 | 2010-03-11 | Prettl Home Appliance Solutions Gmbh | Bedienteil mit einem Tastenelement und Verwendung eines Bedienteils |
| DE102014104324B4 (de) * | 2014-03-21 | 2022-01-27 | Preh Gmbh | Bedienelement mit Kraftsensor |
| DE102014215840B4 (de) * | 2014-08-11 | 2017-05-11 | E.G.O. Elektro-Gerätebau GmbH | Bedienelementteil für eine Bedieneinrichtung, Bedieneinrichtung sowie Kochfeld mit einer Bedieneinrichtung |
-
2023
- 2023-05-11 DE DE102023112404.8A patent/DE102023112404A1/de active Pending
-
2024
- 2024-05-07 WO PCT/EP2024/062603 patent/WO2024231399A1/de not_active Ceased
- 2024-05-07 CN CN202480002925.1A patent/CN119318115A/zh active Pending
- 2024-05-07 EP EP24725429.5A patent/EP4497199A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN119318115A (zh) | 2025-01-14 |
| DE102023112404A1 (de) | 2024-11-14 |
| WO2024231399A1 (de) | 2024-11-14 |
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