EP1990817A1 - Clavier à effleurement pouvant être éclairé - Google Patents

Clavier à effleurement pouvant être éclairé Download PDF

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Publication number
EP1990817A1
EP1990817A1 EP08008244A EP08008244A EP1990817A1 EP 1990817 A1 EP1990817 A1 EP 1990817A1 EP 08008244 A EP08008244 A EP 08008244A EP 08008244 A EP08008244 A EP 08008244A EP 1990817 A1 EP1990817 A1 EP 1990817A1
Authority
EP
European Patent Office
Prior art keywords
layer
membrane keyboard
keyboard according
switching
emitting diode
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.)
Withdrawn
Application number
EP08008244A
Other languages
German (de)
English (en)
Inventor
Joachim Friedrich
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.)
Werner Blase & Co KG GmbH
Original Assignee
Werner Blase & Co KG GmbH
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 Werner Blase & Co KG GmbH filed Critical Werner Blase & Co KG GmbH
Publication of EP1990817A1 publication Critical patent/EP1990817A1/fr
Withdrawn legal-status Critical Current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
    • H01H13/83—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 legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/082—Properties of the membrane transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/082—Properties of the membrane transparent
    • H01H2209/084—Glass
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/037—Light emitting elements using organic materials, e.g. organic LED
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/046—Light emitting elements above switch site
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/07—Actuators transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/006—Containing a capacitive switch or usable as such
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/024—Miscellaneous with inductive switch

Definitions

  • the invention relates to an illuminable membrane keyboard having an outer layer having at least one transparent region, a switching layer which contains at least one switching element located below the transparent region, and a light-emitting means arranged between the transparent region and the switching element.
  • the outer or front layer is usually flat, embossed or provided with convex elevations which are located where there is a marked area, in particular a finger-operated keypad (eg. DE 297 03 194 U1 ).
  • the areas to be served can be transparent, diffuse transparent, colored glaze or crystal clear. In addition, these areas are generally unlit, which is why an operation of the keyboard in a dark environment is not possible.
  • membrane keypads of the type described, whose to be operated or only to be considered areas can be illuminated with a located below the outer layer of light.
  • switching elements consist of domes
  • LED elements Light Emitting Diode
  • These are arranged either below the snap discs or laterally next to the snap discs in a spacer layer.
  • the LED elements arranged below the snap discs (eg. DE 20 2004 016 741 U1 . DE 20 2004 17 365 U1 )
  • the snap discs must be provided with a passage permitting the passage of light. This has the consequence that the transparent areas of the outer layer are illuminated only punctiform, which is undesirable in larger areas.
  • bulbs in the form of additional inserts acting as light distribution plates are arranged in order to avoid this disadvantage between the domes and the outer layer, then the total thickness of the membrane keyboard is correspondingly increased.
  • the LED elements to avoid perforated snap disks are arranged laterally of these in a spacer layer arranged between the outer layer and the switching layer and illuminate a light distribution plate arranged below the outer layer (eg. 20 2004 007 474 U1 ).
  • EL Electro Luminescence
  • Such EL foils are relatively flat and allow a wide illumination of larger areas.
  • the disadvantage, however, is that in contrast to LED elements, they must be operated with high alternating voltages (eg 115 V instead of 12 V to 24 V DC voltage) and high frequencies (eg 400 Hz). This leads to increased costs and is often undesirable because of the associated security risk and z. B. for sensitive applications such. B. in hospitals, schools and similar facilities not suitable.
  • the bulbs formed from the EL foils can be arranged between the outer layer and the switching layer without additional measures having to be taken in the area of the switching layer, which is not possible with the use of LED elements.
  • the object of the invention is therefore to design the illuminated membrane keyboard of the type described above so that in a simple manner and independent of Structure of the switching layer a good illumination of larger areas of the outer layer is possible, a substantial increase in the total thickness of the membrane keyboard is avoided and in particular small DC voltages sufficient for the operation of the lamp.
  • the invention is characterized in that the light source is formed of an organic light-emitting diode (OLED).
  • OLED organic light-emitting diode
  • the invention combines the advantages of the prior art while avoiding its disadvantages.
  • OLED elements with small DC voltages of z. B. 12 V or 24 V are operated so that they pose as LED elements no security risk and above all can be inexpensively manufactured and installed.
  • membrane keyboard contains in a conventional manner as the uppermost outer layer 1, a film which is provided with at least one transparent region 2.
  • Such areas 2 can be operated with the fingers and keys to z. B. be formed by embossing or otherwise slightly curved concave, or only consist of windows, are represented by any marks.
  • transparent is understood to mean regions 2 that are crystal-clear, diffusely transparent or translucent in such a way that they are clearly visible when illuminated from below, even in a dark environment.
  • a conventional switching layer 3 is arranged, which is provided with switching elements 4 and, for example, also consists of a film.
  • the switching elements 4 can, for. B. be formed as a snap discs that close in a known manner when depressing one of the areas 2 a contact.
  • the switching layer 3 On its underside facing away from the outer layer 1, the switching layer 3 preferably additionally has an adhesive layer 5 provided with an adhesive, by means of which the membrane keyboard can be fastened to an associated device.
  • OLED Organic Light Emitting Diode
  • Such a light-emitting diode has a sandwich structure, not shown, and in the simplest case essentially consists of a carrier on which two electrodes and an arranged between them, z. B. 100 nm to 200 nm thick, organic film are applied.
  • the organic film is depending on the case z. B. made of a low or macromolecular carbon compound which is vapor-deposited on a support in the form of a glass sheet or a flexible plastic film.
  • the polymeric material can also be prepared as a plastic solution and dripped onto the carrier by means of a rapidly rotating disc (spin-coating method). It would also be possible to apply a low-viscosity polymer layer by knife coating.
  • OLED elements of a PPV polymer Polyphenylenvinylen
  • the luminescent color of an OLED element can be adjusted, for example, via the selected molecule modification, wherein for the purposes of the invention it is preferable to choose a composition which covers the entire range visible to the human eye.
  • the light emission from the OLED element generally takes place through the transparently formed ITO anode, so that the anode in Fig. 1 and 2 is above.
  • an OLED element is self-luminous over its entire surface, therefore a bright, visible from all sides lighting the transparent areas causes and still has low energy consumption.
  • the OLED element according to the invention is applied to a z. B. 30 .mu.m to 50 .mu.m thick, flexible glass or plastic film applied as a carrier, which easily moves when operating a button (area 2), od to the contours of the areas 2 and the underlying snap discs 4. The like and the operation of the snap discs 4 od. Like. Not hindered.
  • the electrodes 7, 8 of the OLED elements 6 are connected according to a preferred embodiment of the invention in such a way with a circuit that the intensity of the emitted light can be set differently. As a result, the users of the membrane keyboard can set the desired brightness of the areas 2 in the individual case.
  • the membrane keypad described can be provided with one or more OLED lighting means 6, depending on the size. On the one hand, this depends on the size of the membrane keyboard and the number of areas to be illuminated, and on the other hand on the sizes in which the OLED elements are available. In addition, several existing OLED elements may serve the purpose of illuminating only selected areas 2 associated with them and / or illuminating selected areas of different colors.
  • spacer layers 9, 10 spacer foils are arranged. If necessary, these have recesses 11, 12 of suitable size where the areas 2 and the snap disks 4 or the like are located (FIG. Fig. 2 ).
  • switching layers 3 can be provided according to the invention, as they are for. B. in so-called.
  • Flat keyboards eg Mylar dome technique
  • the switching layer 3 may be formed as a printed circuit board (board), e.g. one made of FR4 material.
  • the (flexible) OLED elements between the switching layer and the outer layer can be arranged and affect the function of the membrane keypad in any way. In contrast to the solutions working with LED elements, the areas 2 are therefore illuminated over the whole area without the need for special measures in the area of the switching layer 3.
  • the outer layer 1 can also be realized by a glass plate instead of by a flexible plastic film or the like.
  • the switching layer 3 is here connected via a capacitive or inductive, e.g. triggered directly below the glass plate switching element 4 triggered.
  • the keyboard may be provided with fields not shown in the drawings, which are formed only as a display, information or warning signs. Such, trained on the type of displays fields are only illuminated, but not operated, and serve as an indication of the operation of the keys or the display of alphanumeric characters.
  • the outer layer 1 additional, for example, arranged on an edge of the actual keyboard, transparent areas 2, which are provided with alphanumeric or other characters. With particular advantage, at least one of these areas can enable a digital display, for example, by subdividing an associated organic light emitting diode or an associated part of an organic light emitting diode into a plurality of segments enabling a digital display.
  • these segments can be arranged, for example, in the manner of a conventional 7-segment display.
  • the main advantage of such a measure is that the installation of additional elements with digital display omitted and the keyboard can therefore be kept very flat. If the wiring problems at too large a density of the keys and / or the digital displays, it is within the scope of the invention without significant increase in the thickness of the keyboard possible, the digital displays enabling organic light emitting diodes in a second, also between the outer layer 1 and to lay the switching layer 3 arranged level.
  • the outer layer 1 and / or the carrier layer for the OLED elements can also be rigid at least in these areas and consist for example of glass.
  • the invention is not limited to the described embodiment, which can be modified in many ways. This applies in particular to the electrical circuit arrangements used in the individual case as switching layers and lighting means 6, for the means provided for switching the lighting means on and / or off, and for the number and / or the shape of the areas 2 used in the individual case , by means of which the areas 2 are illuminated, are selected individually.
  • the production of the OLED elements can also be carried out differently than described above.
  • the various features may be applied in combinations other than those described and illustrated.

Landscapes

  • Push-Button Switches (AREA)
EP08008244A 2007-05-07 2008-04-30 Clavier à effleurement pouvant être éclairé Withdrawn EP1990817A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200720006647 DE202007006647U1 (de) 2007-05-07 2007-05-07 Beleuchtbare Folientastatur

Publications (1)

Publication Number Publication Date
EP1990817A1 true EP1990817A1 (fr) 2008-11-12

Family

ID=38320404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08008244A Withdrawn EP1990817A1 (fr) 2007-05-07 2008-04-30 Clavier à effleurement pouvant être éclairé

Country Status (2)

Country Link
EP (1) EP1990817A1 (fr)
DE (1) DE202007006647U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007008159U1 (de) * 2007-06-08 2007-09-06 Fraunhofer Institut für Angewandte Polymerforschung Folientastatur mit leuchtenden Tasten
DE202008011543U1 (de) 2008-08-29 2008-11-13 Göttert, Thomas Tastatur-Bedienpaneel
DE102011075751B4 (de) 2011-05-12 2017-06-08 Wtk-Elektronik Gmbh Eingabevorrichtung
DE102012111820B3 (de) * 2012-12-05 2014-05-08 Werner Blase Gmbh & Co. Kg Kommunikationstechnik Folienanordnung für eine Flacheingabe-Tastatur und Flacheingabe-Tastatur mit einer solchen
DE102012111824B4 (de) 2012-12-05 2019-03-14 Werner Blase Gmbh & Co. Kg Kommunikationstechnik Beleuchtete Flacheingabe-Tastatur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29703194U1 (de) 1997-02-22 1997-04-24 Hoffmann & Krippner GmbH, 74722 Buchen Folientastatur
EP1152443A2 (fr) * 2000-05-02 2001-11-07 Nokia Mobile Phones Ltd. Dispositif d'éclairage pour claviers permettant un éclairage dynamique et individuel des touches, et méthode utilisant ce dispositif
DE202004007474U1 (de) 2004-05-10 2004-07-01 Richard Wöhr GmbH Beleuchtete folienabgedeckte Tastatur auf Schnappscheibenbasis mit elastischem, in Segmenten unterteiltem Einlegeteil
US20040173811A1 (en) * 2000-05-22 2004-09-09 Semiconductor Energy Laboratory Co., Ltd, A Japan Corporation Light emitting device and electrical appliance
DE202004016741U1 (de) 2004-10-28 2005-01-05 Richard Wöhr GmbH Beleuchtete folienabgedeckte Tastatur auf Schnappscheibenbasis mit elastischem Inlay als Lichtverteilerplatte
DE202004017365U1 (de) 2004-11-10 2005-01-20 Richard Wöhr GmbH Beleuchtbare Design- und/oder Frontfolie mit elastischem, in Segmente unterteilten Betätigungselementen als Lichtverteilerplatten und fühlbarem Druckpunkt
US20070023262A1 (en) * 2005-07-27 2007-02-01 Dean-Kuo Liu Keypad and manufacturing method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29703194U1 (de) 1997-02-22 1997-04-24 Hoffmann & Krippner GmbH, 74722 Buchen Folientastatur
EP1152443A2 (fr) * 2000-05-02 2001-11-07 Nokia Mobile Phones Ltd. Dispositif d'éclairage pour claviers permettant un éclairage dynamique et individuel des touches, et méthode utilisant ce dispositif
US20040173811A1 (en) * 2000-05-22 2004-09-09 Semiconductor Energy Laboratory Co., Ltd, A Japan Corporation Light emitting device and electrical appliance
DE202004007474U1 (de) 2004-05-10 2004-07-01 Richard Wöhr GmbH Beleuchtete folienabgedeckte Tastatur auf Schnappscheibenbasis mit elastischem, in Segmenten unterteiltem Einlegeteil
DE202004016741U1 (de) 2004-10-28 2005-01-05 Richard Wöhr GmbH Beleuchtete folienabgedeckte Tastatur auf Schnappscheibenbasis mit elastischem Inlay als Lichtverteilerplatte
DE202004017365U1 (de) 2004-11-10 2005-01-20 Richard Wöhr GmbH Beleuchtbare Design- und/oder Frontfolie mit elastischem, in Segmente unterteilten Betätigungselementen als Lichtverteilerplatten und fühlbarem Druckpunkt
US20070023262A1 (en) * 2005-07-27 2007-02-01 Dean-Kuo Liu Keypad and manufacturing method thereof

Also Published As

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DE202007006647U1 (de) 2007-07-26

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