EP1287538B1 - Element de commutation eclaire - Google Patents

Element de commutation eclaire Download PDF

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Publication number
EP1287538B1
EP1287538B1 EP01940555A EP01940555A EP1287538B1 EP 1287538 B1 EP1287538 B1 EP 1287538B1 EP 01940555 A EP01940555 A EP 01940555A EP 01940555 A EP01940555 A EP 01940555A EP 1287538 B1 EP1287538 B1 EP 1287538B1
Authority
EP
European Patent Office
Prior art keywords
layer
switch element
carrier foil
carrier
foil
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.)
Expired - Lifetime
Application number
EP01940555A
Other languages
German (de)
English (en)
Other versions
EP1287538A1 (fr
Inventor
Marc Schmiz
Paul Schockmel
Aloyse Schoos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IEE International Electronics and Engineering SA
Original Assignee
IEE International Electronics and Engineering SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IEE International Electronics and Engineering SA filed Critical IEE International Electronics and Engineering SA
Publication of EP1287538A1 publication Critical patent/EP1287538A1/fr
Application granted granted Critical
Publication of EP1287538B1 publication Critical patent/EP1287538B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
    • H01H13/785—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/032—Conductive polymer; Rubber
    • H01H2201/036—Variable resistance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/016—Protection layer, e.g. for legend, anti-scratch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/018—Electroluminescent panel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/018—Electroluminescent panel
    • H01H2219/02—Electroluminescent panel programmable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/01—Application power window

Definitions

  • the present invention relates to an illuminated switching element, in particular a switching element in foil construction.
  • Switching elements in film construction such. Membrane switches, film pressure sensors or the like, generally comprise at least two substantially elastic film layers, which are arranged at a certain distance from each other. This happens e.g. by means of a spacer, which is arranged around the active region of the switching element around and on which the two film layers are glued with their respective edges. In the active region of the switching element, different contact arrangements are applied to the film layers between which an electrical contact is made when the two film layers are compressed, so that the switching element is triggered. As the pressure on the foil layers decreases, they again assume their spaced position relative to one another due to their elasticity and the electrical contact between the different contact arrangements is interrupted.
  • Such a switching element has a very low installation height and is characterized in particular by the diverse possibilities of shaping the button. As a result, such switching elements are particularly well suited for use in the areas in which a low structural size and a flexible design of the buttons is required.
  • switching elements When switching elements are used in areas in which varying light conditions are to be expected, switching elements are preferably designed in such a way that their button, which is visible to the outside, is illuminated from behind. In conventional switches, this backlight is often achieved in that the switch button of the switch is at least partially made of a transparent plastic and is illuminated from behind by a light bulb. Alternatively, the space behind the switch button be illuminated via a light guide. However, such a configuration of the switch lighting is not applicable to a switching element in foil construction due to the desired low installation height.
  • the document US-A-4,812,831 describes a lighted membrane keypad, bel a film screen is applied to a membrane keypad,
  • the membrane keyboard comprises an upper carrier foil and a lower carrier foil, which are arranged by means of a spacer at a certain distance from each other.
  • On the lower carrier film two electrode structures are spaced apart from each other, which are contacted upon actuation of the switching element by a layer applied to the underside of the upper carrier film layer of a conductive material.
  • a shielding grid made of an electrically conductive ink is first applied.
  • an adhesive layer is applied, by means of which a fluorescent screen unit is glued to the keyboard.
  • the luminescent screen unit comprises a phosphor layer of a phosphor material applied to a polyester layer and a plurality of electrodes which are arranged on the underside of this polyester layer. Above the fluorescent screen unit, another film labeled with graphic characters is arranged by means of an adhesive layer.
  • the document EP-A-0 996 131 describes an illuminated switching element with two laminated carrier foils, between which contact arrangements are mounted such that upon compression of the carrier foils an electrical contact between the contact arrangements is made.
  • a fluorescent screen unit is laminated by means of a spacer made of a double-sided adhesive film.
  • the phosphor unit in turn comprises a lower insulating film, a first electrode layer, a dielectric layer, a phosphor layer, a second electrode layer, and an upper transparent insulating layer, which are stacked on each other in this order.
  • the document US-A-6,069,444 describes an input device with a printed circuit board on which a plurality of contact arrangements are applied.
  • a switching position with a plurality of triggering elements is arranged such that upon hitting a vertical actuating force at least two of the contact arrangements are short-circuited by a trigger element.
  • a fluorescent screen unit is arranged above the switching position.
  • This luminescent screen unit comprises a lower carrier foil on which connecting lines for a plurality of luminescent units are applied.
  • the luminous units each comprise, from top to bottom, a transparent carrier layer, a first transparent electrode layer, a phosphor center layer, a dielectric layer and a bottom electrode layer.
  • Document DE-A-0 763 838 describes a membrane switch with a dome spring in which a luminescent screen unit is mounted inside the dome on the top of an insulating film.
  • the fluorescent screen unit comprises a phosphor layer and a dielectric layer.
  • Object of the present invention is therefore to propose an illuminated switching element in foil construction.
  • a switching element according to claim 1 in film construction comprises a first carrier foil and a second carrier foil, which are arranged at a certain distance from each other. At least one foil-type luminescent screen unit is applied on the side of the first carrier foil facing away from the second carrier foil. According to the present invention, therefore, a film-like fluorescent screen unit is externally applied to the switching element.
  • the luminescent screen unit can be applied, for example, to the side of the switching element facing the user, so that when the luminescent screen unit is electrically actuated, the side of the switching element facing the user is illuminated. To this Way, the user-operable shading surface of the switching element is easy to locate even in low light conditions for the user.
  • the luminescent screen unit can be applied on the side of the switching element facing away from the user so that the switching element is illuminated from the rear.
  • the effective button may be backlit, or a particular, eg, annular, area around the button, or a combination of the two.
  • a film-like, flexible screen unit has a very small thickness, so that a shadow element according to the invention is further characterized by a particularly low installation height. by virtue of the high flexibility of such a film-like fluorescent screen unit, the response of the switching element is also affected only insignificantly.
  • the foil-type luminescent screen unit preferably has a capacitor structure with a dielectric luminous means embedded between two contactable electrode layers. When an alternating electrical voltage is applied between the two electrode layers, an alternating electric field is generated which excites the light source to emit light.
  • the lighting means generally comprises a powdery substance which phosphoresces at a certain wavelength, e.g. Phosphorus.
  • the color of the emitted light can be influenced by the composition of the light source.
  • the luminescent screen unit has a first electrode layer, a dielectric layer, a luminous means layer and a second electrode layer, which are applied to one another in this order.
  • the first electrode layer can be applied, for example, on a suitable carrier foil, while a light-permeable covering layer is applied to the second electrode layer.
  • Such an element can for example be laminated onto the first carrier film.
  • the first electrode layer is applied directly to the side of the first carrier foil facing away from the second carrier foil.
  • the carrier foil of the luminescent screen unit is saved, on the other hand, the step for laminating the luminescent screen unit to the first carrier foil is omitted in the production of the illuminated sensor. It should be noted that the saving of the carrier foil of the fluorescent screen unit leads to a reduction of the thickness of the switching element and an optimization of the tripping behavior.
  • the electrode layer facing away from the first carrier foil, ie, the one later User-facing electrode layer preferably transparent.
  • Such a translucent electrode layer comprises, for example, a suitable carrier film which has a coating of indium zinc oxide or of a conductive polymer on the side facing the luminous means layer.
  • the light-transmissive electrode layer is laminated, for example, to the luminous means layer.
  • the translucent electrode layer has a conductive material which is printed on the luminous means layer.
  • the conductive material can be applied to the light-emitting layer in the form of a conductive ink, for example.
  • Such a configuration has the advantage that the application of the electrode layer, e.g. in a screen printing process, is very simple and can be done for example on the same systems on which the electrode structures of the switching element are applied to the carrier films.
  • the electrode layer applied to the first carrier foil of the switching element is preferably also printed on the carrier foil. It may, for example, comprise a printed silver layer or a graphite layer.
  • the dielectric layer and the luminous means layer, the latter, for example in the form of an ink containing an illuminant, can also be printed on the lower electrode layer in a screen printing process. In this way, the entire layer structure of the luminescent screen unit can be produced on screen-printing systems, the handling of which is known to the manufacturer of switching elements in foil construction precisely.
  • the light-emitting layer can be applied in such a way that it has the form of a graphic symbol which is assigned to a specific switching function, for example the actuation of a window regulator in a vehicle.
  • a specific switching function for example the actuation of a window regulator in a vehicle.
  • the luminous means layer has a plurality of individually controllable areas.
  • a graphical symbol or image information can be displayed, which corresponds to a specific switching function.
  • the individually controllable areas of the light-emitting layer are preferably arranged in grid form in rows and columns, so that the light-screening unit displays a screen on which different symbols can be displayed in a luminous manner depending on the activation of certain areas.
  • Such an embodiment is particularly advantageous when the switching function of a switching element as in a menu control can be changed.
  • a graphic symbol can simply be printed by means of a dark ink on the translucent electrode layer or a covering layer arranged above it.
  • the icon for the user can be seen as a contrast in front of the illuminated background of the fluorescent screen unit.
  • the actual switching element can be constructed, for example, such that it operates in a short circuit mode, the so-called "shunt mode".
  • the switching element has two contact arrangements, which are applied at a certain distance from each other on one of the two carrier films, wherein the contact arrangements are applied to the side of the carrier film, which faces the other carrier film.
  • the switching element On the side of the other carrier foil facing the two contact arrangements, the switching element then has a triggering element such that the triggering element contacts the two contact arrangements when the two carrier foils are compressed.
  • the triggering element comprises a simple conductive layer, e.g. made of silver.
  • the switching element is a simple switch with two discrete states.
  • the triggering element has a pressure-sensitive layer, e.g. made of a semiconductor material, on.
  • the switching element is a pressure sensor, a so-called foil pressure sensor.
  • the switching element is constructed such that it works in the so-called "through-mode".
  • it has two contact arrangements, of which one is applied to each of the two carrier foils, such that the two contact arrangements face each other and during Compressing the two carrier films are contacted with each other.
  • the switching element may represent a simple discrete switch or a foil pressure sensor. In the latter case, for example, a layer of a pressure-sensitive material is arranged between the first and the second contact arrangement.
  • the switching element according to the invention is particularly suitable for use in a switch module of a motor vehicle.
  • all switch elements are generally illuminated so that the driver can easily locate and operate the various buttons even at night driving.
  • the switching elements according to the invention Due to the ever increasing demands on the design of interior fittings, the installation space available for the required switch elements in modern vehicles is shrinking.
  • the switching elements according to the invention with their small thickness better meet the needs than the conventional switch.
  • the flexibility of the switching elements according to the invention makes it possible to adapt the switch elements to rounded shapes in the vehicle interior, so that overall when using the switching elements according to the invention new possibilities arise in the selection of a suitable installation location for a required switch module.
  • the switching element 10 comprises a first and a second carrier foil 12 and 14, which are laminated together by means of a spacer 16, for example a double-sided adhesive foil.
  • a spacer 16 for example a double-sided adhesive foil.
  • the spacer 16 has a recess 20, so that in this area the two carrier films 12 and 14 are spaced apart.
  • contact arrangements 22 and 24 are arranged on the inner side of the carrier films 12 and 14, between which an electrical contact is produced when the two carrier films are compressed.
  • the contact arrangements 22 and 24 may comprise, for example, electrode structures, wherein at least one of the contact arrangements additionally comprises a layer of a pressure-sensitive material.
  • the contact arrangements are applied to the corresponding surfaces of the carrier films, for example, before the carrier films are laminated together in a screen printing process.
  • a fluorescent screen unit 26 is applied to the first carrier film.
  • a dielectric in a layer 30 is applied, on which in turn a Leuchtmittei Mrs 32 is applied.
  • a second Elektraden Anlagen 34 is applied, so that a capacitor structure is formed in which upon application of an alternating voltage between the two electrode layers 28 and 34, an alternating electric field is generated, which excites the Leuchtmfttel to shine.
  • Covered is the capacitor structure thus produced by means of a cover layer 36, which electrically isolates the structure on the one hand to the outside and on the other hand protects against mechanical damage and against environmental influences.
  • the layers 28 to 36 are preferably each applied in a screen-printing process to the underlying layer. Such a method allows a simple way an individual shape design of the individual layers.

Landscapes

  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)
  • Electroluminescent Light Sources (AREA)

Claims (15)

  1. Élément de commutation (10) en forme de feuilles, comprenant
    une première feuille de support (12) et une deuxième feuille de support (14) qui sont disposées à une certaine distance l'une de l'autre, différents ensembles de contact (22, 24) étant appliqués entre les première et deuxième feuilles de support sur la première (12) et/ou la deuxième (14) feuille de support, entre lesquels peut s'établir un contact électrique lors de la compression de la première (12) et de la deuxième (14) feuille de support et
    une unité d'écran lumineux de type feuille (26), laquelle est appliquée sur le côté de la première feuille de support (12) ne faisant pas face à la deuxième feuille de support (14), l'unité d'écran lumineux (26) comportant une première couche électrode (28), une couche diélectrique (30), une couche de moyen lumineux (32) et une deuxième couche électrode (34), lesquelles sont appliquées l'une sur l'autre dans cet ordre,
    caractérisé en ce que la première couche électrode (28) est appliquée directement sur le côté de la première feuille de support (12) ne faisant pas face à la deuxième feuille de support (14)
  2. Élément de commutation (10) selon la revendication 1, caractérisé en ce que l'unité d'écran lumineux de type feuille (26) présente une structure de condensateur avec un moyen lumineux diélectrique, lequel est intercalé entre deux couches électrodes entre lesquelles peut s'établir un contact,
  3. Élément de commutation (10) selon la revendication 2, caractérisé en ce que le moyen lumineux comporte une couche de phosphore
  4. Élément de commutation (10) selon l'une des revendications 1 à 3, caractérisé en ce que la couche électrode ne faisant pas face à la première feuille de support (12) est perméable à la lumière
  5. Élément de commutation (10) selon la revendication 4, caractérisé en ce que la couche électrode perméable à la lumière comporte une feuille de support appropriée qui, sur le côté tourné vers la couche de moyen lumineux, comporte un revêtement en oxyde d'indium et de zinc ou en un polymère conducteur, la couche électrode perméable à la lumière étant laminée sur la couche de moyen lumineux
  6. Élément de commutation (10) selon la revendication 4, caractérise en ce que la couche électrode perméable à la lumière comporte une matière conductrice qui est imprimée sur la couche de moyen lumineux
  7. Élément de commutation (10) selon l'une des revendications 1 à 6, caractérisé en ce que la couche de moyen lumineux (32) présente la forme d'un symbole graphique
  8. Élément de commutation (10) selon l'une des revendications 1 à 7, caractérisé en ce que la couche de moyen lumineux (32) comporte plusieurs zones activables individuellement
  9. Élément de commutation (10) selon la revendication 8, caractérisé en ce que les zones activables individuellement de la couche de moyen lumineux (32) sont disposées sous la forme d'une grille en lignes et colonnes
  10. Élément de commutation (10) selon l'une des revendications précédentes, caractérisé en ce que l'unité d'écran lumineux (26) comporte une couche protectrice sur le côté ne faisant pas face à la première feuille de support (12)
  11. Élément de commutation (10) selon l'une des revendications 1 à 10, comportant deux ensembles de contact (22, 24) qui sont appliqués à une certaine distance l'un de l'autre sur l'une des deux feuilles de support (12, 14), les ensembles de contact (22, 24) étant appliqués sur le côté de la feuille de support qui est tourné vers l'autre feuille de support, et un élément de déclenchement qui est appliqué sur le côté de l'autre feuille de support, tourné vers les deux ensembles de contact, de manière telle que, lors de la compression des deux feuilles de support (12, 14), un contact s'établit entre les deux ensembles de contact (22, 24).
  12. Élément de commutation (10) selon la revendication 11, caractérisé en ce que l'élément de déclenchement comporte une couche sensible à la pression
  13. Élément de commutation (10) selon l'une des revendications 1 à 10, comportant deux ensembles de contact (22, 24) dont respectivement l'un est appliqué sur chacune des deux feuilles de support (12, 14) de manière telle que les deux ensembles de contact (22, 24) se font face et qu'un contact s'établit entre eux lors de la compression des deux feuilles de support (12, 14)
  14. Élément de commutation (10) selon la revendication 13, caractérisé en ce qu'est disposée, entre les premier et deuxième ensembles de contact (22, 24), une couche réalisée dans une matière sensible à la pression
  15. Utilisation d'un élément de commutation (10) selon l'une des revendications précédentes dans un module commutateur d'un véhicule automobile
EP01940555A 2000-06-09 2001-06-08 Element de commutation eclaire Expired - Lifetime EP1287538B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90594A LU90594B1 (de) 2000-06-09 2000-06-09 Beleuchtetes Schaltelement
LU90594 2000-06-09
PCT/EP2001/006511 WO2001095357A1 (fr) 2000-06-09 2001-06-08 Element de commutation eclaire

Publications (2)

Publication Number Publication Date
EP1287538A1 EP1287538A1 (fr) 2003-03-05
EP1287538B1 true EP1287538B1 (fr) 2006-08-16

Family

ID=19731908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01940555A Expired - Lifetime EP1287538B1 (fr) 2000-06-09 2001-06-08 Element de commutation eclaire

Country Status (8)

Country Link
US (1) US6875938B2 (fr)
EP (1) EP1287538B1 (fr)
JP (1) JP2003536213A (fr)
AT (1) ATE336794T1 (fr)
AU (1) AU2001274090A1 (fr)
DE (1) DE50110753D1 (fr)
LU (1) LU90594B1 (fr)
WO (1) WO2001095357A1 (fr)

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NZ501409A (en) 1997-06-04 2002-02-01 Dsm N High-activity phytase compositions containing a carbohydrate polymer
JPH1139984A (ja) * 1997-07-14 1999-02-12 Teikoku Tsushin Kogyo Co Ltd Ｅｌ照光式スイッチ

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WO2001095357A1 (fr) 2001-12-13
LU90594B1 (de) 2001-12-10
US6875938B2 (en) 2005-04-05
DE50110753D1 (de) 2006-09-28
JP2003536213A (ja) 2003-12-02
AU2001274090A1 (en) 2001-12-17
US20040108193A1 (en) 2004-06-10
EP1287538A1 (fr) 2003-03-05
ATE336794T1 (de) 2006-09-15

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