DE102007008007A1 - Keyboard i.e. optical keyboard, for personal computer, has larger keys e.g. space bars, with photosensors that detect keystroke by darkening of sensors, where keyboard is made of plastic, metal, glass and wood - Google Patents

Keyboard i.e. optical keyboard, for personal computer, has larger keys e.g. space bars, with photosensors that detect keystroke by darkening of sensors, where keyboard is made of plastic, metal, glass and wood Download PDF

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Publication number
DE102007008007A1
DE102007008007A1 DE200710008007 DE102007008007A DE102007008007A1 DE 102007008007 A1 DE102007008007 A1 DE 102007008007A1 DE 200710008007 DE200710008007 DE 200710008007 DE 102007008007 A DE102007008007 A DE 102007008007A DE 102007008007 A1 DE102007008007 A1 DE 102007008007A1
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Germany
Prior art keywords
keyboard
light
sensors
button
darkening
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DE200710008007
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German (de)
Inventor
Pascal Stauss
Fabian Wrieden
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Individual
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Priority to DE200710008007 priority Critical patent/DE102007008007A1/en
Publication of DE102007008007A1 publication Critical patent/DE102007008007A1/en
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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
    • H03K17/96—Touch switches
    • H03K17/9627—Optical touch switches
    • H03K17/9629—Optical touch switches using a plurality of detectors, e.g. keyboard
    • 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
    • H03K17/96—Touch switches
    • H03K17/9627—Optical touch switches
    • H03K17/9631—Optical touch switches using a light source as part of the switch
    • 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
    • H03K2217/9401—Calibration techniques
    • H03K2217/94015—Mechanical, e.g. by displacement of a body, a shielding element, or a magnet, in or out of the sensing area
    • 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
    • H03K2217/941—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 using an optical detector
    • H03K2217/94102—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 using an optical detector characterised by the type of activation
    • H03K2217/94106—Passive activation of light sensor, e.g. by ambient light
    • 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
    • H03K2217/96015—Constructional details for touch switches
    • 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
    • H03K2217/96042—Touch switches with illumination
    • 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
    • H03K2217/96058—Fail-safe touch switches, where switching takes place only after repeated touch

Landscapes

  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)

Abstract

The keyboard has a driver, microcontroller, and a recess on a surface of each key and including a cover, which permits light passage. Larger keys e.g. space bars, have photosensors that detect keystroke by darkening of the sensors, such that a resulting signal is compared with a signal of un-darkened sensors. Light barriers prevent penetration of light from sides, where the keyboard is made of plastic, metal, glass and wood. A potentiometer is utilized for adjusting of a reaction threshold. An operation amplifier or a comparator is utilized for comparing signals of the keys and a reference.

Description

Stand der TechnikState of the art

Gebiet der ErfindungField of the invention

Die Erfindung betrifft eine Tastatur, welche für verschiedene Anwendungsbereiche geeignet ist, beispielsweise als Computertastatur. Diese neuartige Tastatur bietet eine verschleißfreie, saubere und günstige Alternative zur heutigen Standard PC-Tastatur, bei der jedes Zeichen durch eine eigene bewegliche Drucktaste betätigt wird.The The invention relates to a keyboard which is suitable for various Areas of application is suitable, for example as a computer keyboard. This novel keyboard offers a wear-free, clean and cheap alternative to today's standard PC keyboard, in which each character is actuated by its own movable pushbutton becomes.

Technischer HintergrundTechnical background

Hauptsächlich werden Tastaturen verwendet, welche mit beweglichen Drucktasten arbeiten und somit nicht verschleißfrei sind. Diese sind schlecht sauber zu halten, ihre Herstellung ist außerdem aufwendig und daher teuer.Mainly Keyboards are used with movable pushbuttons work and thus are not wear-free. These are bad To keep clean, their production is also expensive and therefore expensive.

Ferner sind auch Folientastaturen bekannt, welche beispielsweise in Bereichen verwendet werden, in denen besonders auf Hygiene geachtet wird – etwa im medizinischen Bereich, da sie leicht sauber zu halten sind. Auch werden diese Tastaturen in feuchten Bereichen eingesetzt, da hier nicht abgeschlossene bewegliche Tasten Störungen hervorrufen würden. Allerdings sind diese Tastaturen nicht für schnelles Tippen geeignet und werden daher nicht für den Computer-Arbeitsplatz oder Heim-Computer verwendet.Further Membrane keyboards are also known which, for example, in areas are used, in which special attention is paid to hygiene - such as in the medical field, as they are easy to keep clean. Also These keyboards are used in damp areas because here incomplete moving keys cause interference would. However, these keyboards are not for fast Typing and therefore not suitable for the computer workstation or home computer.

Auf dem Markt finden sich unter anderem auch ein Tastenfeld projizierende Tastaturen. Diese projizieren ein Tastenfeld auf eine ebene Fläche, beispielsweise einen Tisch. Sie sind kaum größer als ein Feuerzeug und daher leicht überall mit hinzunehmen. Sie haben jedoch den Nachteil, dass man für die Benutzung eine völlig ebene, nicht reflektierende Fläche benötigt, d. h. diese Tastatur ist nicht überall einsetzbar, bei nicht optimalem Untergrund können Störungen auftreten. Zusätzlich ist die Tastatur empfindlich gegenüber Sonneneinstrahlung, sie ist teuer und schnelles Tippen ist nicht möglich.Among other things, there are keypads that project keyboards on the market , These project a keypad onto a flat surface, such as a table. They are barely larger than a lighter and therefore easy to take anywhere. However, they have the disadvantage that you need for use a completely flat, non-reflective surface, ie this keyboard is not everywhere used, in non-optimal ground disturbances may occur. In addition, the keyboard is sensitive to sunlight, it is expensive and fast typing is not possible.

In der Patentschrift DE 692 22 853 T2 ist bereits ein Vorschlag für eine optische Tastatur verzeichnet. Diese arbeitet mit Lichtleitfasern, mit einer Unterbrechung bei Tastendruck, welche aber sehr empfindlich sind, denn bei Schmutz oder Kratzern auf der Oberfläche könnte das Licht ungünstig gebrochen werden, so dass die beiden Oberflächen der Lichtleitfasern nicht mehr korrekt zueinander ausgerichtet sein würden. Das macht die Tastatur sehr störungsanfällig.In the patent DE 692 22 853 T2 already a proposal for an optical keyboard is listed. This works with optical fibers, with a break at the touch of a button, but which are very sensitive, because with dirt or scratches on the surface, the light could be unfavorably broken, so that the two surfaces of the optical fibers would no longer be aligned correctly. This makes the keyboard very susceptible to interference.

Offenbarung der ErfindungDisclosure of the invention

Beschreibungdescription

Die hier beschriebene Tastatur nutzt einen Lichtsensor zum Erfassen des Tastendrucks durch Abdunklung desselben. Das resultierende Signal wird mit dem eines unabgedunkelten Sensors verglichen, welcher somit als Referenz fungiert.The The keyboard described here uses a light sensor for detection pressing the button by darkening the same. The resulting signal becomes compared with that of a non-darkened sensor, which thus acts as a reference.

Ist das Signal der Taste stärker als das der Referenz, wird der Tastendruck als solcher gewertet.is the signal of the key becomes stronger than that of the reference the keystroke counted as such.

Zum alternativen oder zusätzlichen Anpassen des Reaktionsverhaltens der Tastatur an die Lichtverhältnisse der Umgebung dient ein Potentiometer.To the alternative or additional adaptation of the reaction behavior the keyboard serves to the lighting conditions of the environment a potentiometer.

Ausführungsmöglichkeitendesign options

Die Tastatur kann wasserdicht wie auch wasserdurchlässig gebaut werden. Mögliche Baumaterialien sind Kunststoffe, Metall, Glas und Holz.The Keyboard can be waterproof or water permeable become. Possible building materials are plastics, metal, Glass and wood.

Die Einzeltaste kann mit einem fotoempfindlichen Widerstand, einer Fotodiode, einem Fototransistor, einer Reflexlichtschranke, einem IR-Sensor oder einem Schallsensor gebaut werden.The Single key can be used with a photosensitive resistor, a photodiode, a phototransistor, a retro-reflective sensor, an IR sensor or be built a sound sensor.

Die Tastatur kann mit oder ohne Beleuchtung gebaut werden.The Keyboard can be built with or without lighting.

Zum Vergleichen der Signale von Taste und Referenz kann ein Operationsverstärker oder ein Komparator verwendet werden (siehe 1).To compare the key and reference signals, an operational amplifier or comparator can be used (see 1 ).

Die optische Tastatur ist einsetzbar für PCs, Handys oder andere Geräte mit Tastenfeldern.The Optical keyboard can be used for PCs, mobile phones or others Devices with keypads.

Größere Tasten, wie die Leertaste, können aus mehreren Lichtsensoren bestehen, um die Treffgenauigkeit zu erhöhen (siehe 3).Larger keys, such as the spacebar, can consist of multiple light sensors to increase accuracy (see 3 ).

Die Kommunikation zwischen Computer und Tastatur kann sowohl softwareseitig (über einen passenden Treiber) als auch hardwareseitig (zum Beispiel über einen programmierten Mikrocontroller, welcher das Ausgangssignal der Tastatur zu einem standardisierten Signal transformiert) geschehen.The Communication between computer and keyboard can be both software (via a suitable driver) as well as on the hardware side (for example via a programmed microcontroller, which the output of the keyboard to a standardized Signal transformed) happen.

Das ungewollte, gleichzeitige Reagieren zweier oder mehrerer Tasten kann sowohl über einen speziellen Treiber als auch über einen Mikrocontroller verhindert werden.The unwanted, simultaneous reaction of two or more keys can both through a special driver and over a microcontroller can be prevented.

Vorteileadvantages

Es wurde eine optische PC-Tastatur mit Lichtsensoren erfunden, welche verschleißfrei und kostengünstig ist, beim Kontakt mit Flüssigkeiten keinen Kurzschluss bekommt und bei der die Ablagerungen von Schmutz das Drücken der Taste nicht erschweren. Zusätzlich lässt sie sich leicht mit einem Tuch säubern und bei starker Verschmutzung kann man das Tastenfeld abmontieren, um es in den Geschirrspüler zu legen. Zudem ist sie robust gegenüber Streulicht und bedienungsfreundlich.It has invented a PC optical keyboard with light sensors, which is wear-free and inexpensive, kei in contact with liquids short circuit and dirt deposits do not make it difficult to press the button. In addition, it is easy to clean with a cloth and in case of heavy soiling you can remove the keypad to put it in the dishwasher. In addition, it is robust against stray light and easy to use.

Problemproblem

Der im Patentanspruch 1 angegebenen Erfindung liegt das Problem zugrunde, eine Taste ohne bewegliche Teile zu erstellen, die robust ist, bei verschiedenen Bedingungen leicht und schnell betätigt werden kann und kostengünstig herzustellen ist. Dieses Problem wird durch die in den Patentansprüchen 1 bis 12 aufgeführten Merkmale gelöst.Of the The invention defined in claim 1 is based on the problem to create a button without moving parts, which is sturdy at different conditions are easily and quickly operated can and is inexpensive to manufacture. This problem is characterized by what is stated in claims 1 to 12 Characteristics solved.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • - DE 69222853 T2 [0005] - DE 69222853 T2 [0005]

Claims (12)

Verschleißfreie TastenWear-free buttons Die Oberfläche jeder Taste hat eine Vertiefung mit einer Blende, die einen Lichtdurchlass ermöglicht und das Streulicht vermeidet.The surface of each button has a depression with a shutter that allows light transmission and the Scattered light avoids. Jede Taste wird vorteilhaft als kleine Dunkelkammer ausgeführt.Each button will be beneficial as a small darkroom executed. Ein Dunkelkammereffekt verhindert Störeffekte durch unerwünschtes Licht (siehe 2).A darkroom effect prevents unwanted light interference (see 2 ). Lichtbarrieren verhindern, dass Licht von den Seiten eindringt.Light barriers prevent light from the sides penetrates. Die Tastatur kann einen Signalvergleich zwischen Referenz und Taste nutzen.The keyboard can provide a signal comparison between Use reference and button. Ein Potentiometer kann für die Einstellung der Reaktionsschwelle benutzt werden.A potentiometer can be used for adjustment the reaction threshold can be used. Die Tastatur kann wasserdicht (kurzschlusssicher) sein (geschirrspülerfest) oder durch einen Verschluss gemacht werden.The keyboard can be waterproof (short-circuit proof) be (dishwasher-proof) or made by a closure become. Die Einzeltaste kann mit einem fotoempfindlichen Widerstand, einer Fotodiode, einem Fototransistor, einer Reflexlichtschranke, einem IR-Sensor oder mit einem Schallsensor realisiert werden.The single key can be used with a photosensitive Resistor, a photodiode, a phototransistor, a reflex light barrier, an IR sensor or with a sound sensor can be realized. Die Tastatur ist einsetzbar für PCs, Handys und Geräte mit anderen Tastenfeldern.The keyboard is usable for PCs, mobile phones and Devices with other keypads. Das Verhindern von ungewolltem, gleichzeitigem Drücken zweier Tasten wird softwareseitig oder hardwareseitig gelöst.Preventing unwanted, simultaneous pressing two keys is solved by software or hardware. Robustheit gegenüber Streulicht kann (durch Blenden und einen Dunkelkammereffekt) bei jeder Taste erzeugt werden.Robustness to stray light can (by aperture and a darkroom effect) on each key.
DE200710008007 2007-02-15 2007-02-15 Keyboard i.e. optical keyboard, for personal computer, has larger keys e.g. space bars, with photosensors that detect keystroke by darkening of sensors, where keyboard is made of plastic, metal, glass and wood Withdrawn DE102007008007A1 (en)

Priority Applications (1)

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DE200710008007 DE102007008007A1 (en) 2007-02-15 2007-02-15 Keyboard i.e. optical keyboard, for personal computer, has larger keys e.g. space bars, with photosensors that detect keystroke by darkening of sensors, where keyboard is made of plastic, metal, glass and wood

Applications Claiming Priority (1)

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DE200710008007 DE102007008007A1 (en) 2007-02-15 2007-02-15 Keyboard i.e. optical keyboard, for personal computer, has larger keys e.g. space bars, with photosensors that detect keystroke by darkening of sensors, where keyboard is made of plastic, metal, glass and wood

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010028902A1 (en) * 2008-09-12 2010-03-18 Schneider Electric Industries Sas Control device including a photovoltaic sensor
CN102479007A (en) * 2010-11-30 2012-05-30 英业达股份有限公司 Optical keyboard
EP2822181A1 (en) * 2013-07-03 2015-01-07 Siemens Aktiengesellschaft Sensor assembly and method for operating an operating control
US9553579B2 (en) 2014-12-10 2017-01-24 Pr Electronics A/S Optical keypad for explosive locations

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69222853T2 (en) 1991-06-08 1998-03-19 Tak Seung Ho OPTICAL INTELLIGENT MULTI-PURPOSE KEYBOARD

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69222853T2 (en) 1991-06-08 1998-03-19 Tak Seung Ho OPTICAL INTELLIGENT MULTI-PURPOSE KEYBOARD

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010028902A1 (en) * 2008-09-12 2010-03-18 Schneider Electric Industries Sas Control device including a photovoltaic sensor
FR2936119A1 (en) * 2008-09-12 2010-03-19 Schneider Electric Ind Sas CONTROL DEVICE INCLUDING A PHOTOVOLTAIC SENSOR
CN102479007A (en) * 2010-11-30 2012-05-30 英业达股份有限公司 Optical keyboard
EP2822181A1 (en) * 2013-07-03 2015-01-07 Siemens Aktiengesellschaft Sensor assembly and method for operating an operating control
US9322634B2 (en) 2013-07-03 2016-04-26 Siemens Aktiengesellschaft Sensor arrangement and method for operation of an operating device
US9553579B2 (en) 2014-12-10 2017-01-24 Pr Electronics A/S Optical keypad for explosive locations

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R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee
R409 Internal rectification of the legal status completed
R409 Internal rectification of the legal status completed
R120 Application withdrawn or ip right abandoned

Effective date: 20130320