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GB2190488A - Switch - Google Patents

Switch

Info

Publication number
GB2190488A
GB2190488A GB08706278A GB8706278A GB2190488A GB 2190488 A GB2190488 A GB 2190488A GB 08706278 A GB08706278 A GB 08706278A GB 8706278 A GB8706278 A GB 8706278A GB 2190488 A GB2190488 A GB 2190488A
Authority
GB
United Kingdom
Prior art keywords
phototransistor
switch
finger
diode
glass plate
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Withdrawn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
GB08706278A
Other versions
GB8706278D0 (en
Inventor
Michael John Nobbs
Raymond Arthur Cummins
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB8706278D0 publication Critical patent/GB8706278D0/en
Publication of GB2190488A publication Critical patent/GB2190488A/en
Withdrawn legal-status Critical Current

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
    • H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
    • 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
    • H03K2217/94026—Automatic threshold calibration; e.g. threshold automatically adapts to ambient conditions or follows variation of input

Landscapes

  • Electronic Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

A switch for operation by a finger F at a side of a glass plate (106) remote from the switch has an infra red emitting diode (104) and a phototransistor (107), which are mounted close to each other and the glass plate. A moulding (109) prevents transmission directly from the diode to the phototransistor whereby circuitry provided can detect presence of the finger according to whether the finger reflects transmission from the diode to the phototransistor or not. In one embodiment, the circuitry includes means (115) for sampling and holding the received signal, means (117) for amplifying it by a certain percentage and means (116) for comparing the held amplified signal with the non-amplified signal.
GB08706278A 1984-09-22 1985-09-20 Switch Withdrawn GB2190488A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848424023A GB8424023D0 (en) 1984-09-22 1984-09-22 Switch
PCT/GB1985/000434 WO1986001953A1 (en) 1984-09-22 1985-09-20 Switch

Publications (2)

Publication Number Publication Date
GB8706278D0 GB8706278D0 (en) 1987-04-23
GB2190488A true GB2190488A (en) 1987-11-18

Family

ID=10567129

Family Applications (2)

Application Number Title Priority Date Filing Date
GB848424023A Pending GB8424023D0 (en) 1984-09-22 1984-09-22 Switch
GB08706278A Withdrawn GB2190488A (en) 1984-09-22 1985-09-20 Switch

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB848424023A Pending GB8424023D0 (en) 1984-09-22 1984-09-22 Switch

Country Status (3)

Country Link
EP (1) EP0227677A1 (en)
GB (2) GB8424023D0 (en)
WO (1) WO1986001953A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003009476A1 (en) * 2001-07-16 2003-01-30 Gerd Reime Optoelectronic device for detecting position and movement and method associated therewith
EP1507132A1 (en) * 2003-08-13 2005-02-16 E.G.O. ELEKTRO-GERÄTEBAU GmbH Method and circuit for determination of the activation state of at least one optical element

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912388A (en) * 1985-08-02 1990-03-27 Canon Kabushiki Kaisha Drive control device operating a drive mechanism
DE3715497A1 (en) * 1987-05-09 1988-11-17 Braun Ag SAFETY SWITCHING DEVICE FOR CONTROLLING A POWER CONSUMER
NZ235645A (en) * 1989-10-26 1993-09-27 Alcatel Australia Electronic touch switch uses light reflection
DE4007971A1 (en) * 1990-03-13 1991-09-19 Gaggenau Werke DEVICE FOR SWITCHING ELECTRICAL DEVICES
EP0558871A1 (en) * 1992-03-03 1993-09-08 Elma Electronic Ag Touch-key switch having a layered structure
IT1281770B1 (en) * 1995-03-27 1998-03-03 Castellini Spa CONTROL SYSTEM FOR FUNCTION SELECTORS, PARTICULARLY APPLICABLE ON DENTAL EQUIPMENT
DE19547301C1 (en) * 1995-12-18 1997-03-13 Siemens Ag Actuation device with at least one optoelectronic sensing element, esp. contact sensitive reflection light barrier,
DE10001955A1 (en) 2000-01-18 2001-07-19 Gerd Reime Optoelectronic switch evaluates variation in received light signal for operating switch element when movement of switch operating object conforms to given movement pattern
DE10001943C2 (en) 2000-01-18 2001-12-06 Gerd Reime Device and method for evaluating a useful signal originating from a proximity sensor
GB2410004A (en) * 2004-01-19 2005-07-20 Time & Data Syst Int Keypad
DE102004053496A1 (en) * 2004-10-28 2006-05-04 E.G.O. Elektro-Gerätebau GmbH Optical touch switch
EP3149856B1 (en) * 2014-05-29 2020-09-09 Micro Motion, Inc. Adaptive reflected light touch sensor
DE102016117289A1 (en) * 2016-09-14 2018-03-15 Endress + Hauser Gmbh + Co. Kg Field device with an optoelectronic operating element and method for detecting a touch on the operating element

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340401A (en) * 1963-12-26 1967-09-05 Xerox Corp Motionless data input key
US4051365A (en) * 1973-08-08 1977-09-27 Omron Tateisi Electronics Co. Photoelectric detector having an indicator for indicating the operating condition thereof
EP0025763A1 (en) * 1979-09-12 1981-03-25 Saint Gobain Vitrage International Control panel with touch-switches
EP0033167A2 (en) * 1980-01-11 1981-08-05 Océ-Nederland B.V. Device for the detection of sheet-like objects
US4329581A (en) * 1980-06-04 1982-05-11 General Electric Company Ambient light sensor touch switch system and method
FR2503495A1 (en) * 1981-04-03 1982-10-08 Commissariat Energie Atomique Capacitative touch operated keyboard immune to interference - uses reception electrode signal difference to generate noise free output signal and interference level detection to inhibit key pad operation
DE3146152A1 (en) * 1981-11-21 1983-06-01 Ernst Dipl.-Kfm. Dr. 7100 Heilbronn Haag Optoelectrical key array

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340401A (en) * 1963-12-26 1967-09-05 Xerox Corp Motionless data input key
US4051365A (en) * 1973-08-08 1977-09-27 Omron Tateisi Electronics Co. Photoelectric detector having an indicator for indicating the operating condition thereof
EP0025763A1 (en) * 1979-09-12 1981-03-25 Saint Gobain Vitrage International Control panel with touch-switches
EP0033167A2 (en) * 1980-01-11 1981-08-05 Océ-Nederland B.V. Device for the detection of sheet-like objects
US4329581A (en) * 1980-06-04 1982-05-11 General Electric Company Ambient light sensor touch switch system and method
FR2503495A1 (en) * 1981-04-03 1982-10-08 Commissariat Energie Atomique Capacitative touch operated keyboard immune to interference - uses reception electrode signal difference to generate noise free output signal and interference level detection to inhibit key pad operation
DE3146152A1 (en) * 1981-11-21 1983-06-01 Ernst Dipl.-Kfm. Dr. 7100 Heilbronn Haag Optoelectrical key array

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, VOLUME 21, NR. 1, JUNE 1978, NEW YORK, (US)PAGES 29 AND 30, *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003009476A1 (en) * 2001-07-16 2003-01-30 Gerd Reime Optoelectronic device for detecting position and movement and method associated therewith
CN1294702C (en) * 2001-07-16 2007-01-10 格尔德·赖梅 Optoelectronic device for detecting position and/or movement and associated method
US7456815B2 (en) 2001-07-16 2008-11-25 Gerd Reime Optoelectronic device for position and/or movement detection as well as the associated method
EP1507132A1 (en) * 2003-08-13 2005-02-16 E.G.O. ELEKTRO-GERÄTEBAU GmbH Method and circuit for determination of the activation state of at least one optical element

Also Published As

Publication number Publication date
EP0227677A1 (en) 1987-07-08
WO1986001953A1 (en) 1986-03-27
GB8424023D0 (en) 1984-10-31
GB8706278D0 (en) 1987-04-23

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)