WO2005125011A1 - Bloc a effleurement optique - Google Patents

Bloc a effleurement optique Download PDF

Info

Publication number
WO2005125011A1
WO2005125011A1 PCT/GB2005/002337 GB2005002337W WO2005125011A1 WO 2005125011 A1 WO2005125011 A1 WO 2005125011A1 GB 2005002337 W GB2005002337 W GB 2005002337W WO 2005125011 A1 WO2005125011 A1 WO 2005125011A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
touch pad
substrate
optical touch
controller
Prior art date
Application number
PCT/GB2005/002337
Other languages
English (en)
Inventor
Julian Richard Hawes
Original Assignee
United Kingdom Atomic Energy Authority
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 United Kingdom Atomic Energy Authority filed Critical United Kingdom Atomic Energy Authority
Publication of WO2005125011A1 publication Critical patent/WO2005125011A1/fr

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
    • H03K17/96—Touch switches
    • H03K17/9627—Optical touch switches
    • H03K17/9638—Optical touch switches using a light guide
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • 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

Definitions

  • the invention relates to optical touch pads.
  • push button keyboards have been used by operators to interact with computers. These push button keyboards represent the interface between a mechanical action and the electronics necessary for the operation of the computer. These keyboards often have spaces between various buttons so that liquids or any other undesirable substance penetrates behind the buttons to potentially hamper the operation of the keyboard. Keyboards with carbon or membrane switch mechanisms may be particularly vulnerable to these substances.
  • the present invention aims to introduce a touch pad which also overcomes the disadvantages of traditional push button arrangements where substances may hamper their operation. Whilst overcoming the drawbacks of push button systems, the present invention also aims to benefit from the advantages inherent in optical systems. Optical system will have improved reliability over capacitive sensors. They will also be ideally suited for integration in the optical systems of the future as many electrical components are replaced by optical systems as is currently predicted.
  • the invention provides an optical touch pad, comprising one or more light emitters, a substrate onto wliich the emitted light is transmitted, an optical detector wliich detects changes in the properties of the light it receives and a controller for talcing a pre-determined action in response to said detected changes, wherein in a first mode of operation, a pre-determined light amount is emitted through the substrate which causes the controller to take no action and in a second mode of operation, when an operator almost touches or touches said substrate so that an interference with the light transmitted onto the substrate occurs which causes a change in the light detected in response to which the controller takes a pre-determined action.
  • This configuration is particularly advantageous because it does away with the prior art requirement of having moveable buttons wliich allow the passage of substances which could be harmful to the operation of the pad. It may be used to create a smoother surface or interaction with an operator. It may also be readily used in optical computer systems which are currently being developed. This configuration may also have improved responsiveness without requiring the relatively high forces of impact on the pad which may be required in certain prior art pads. A simple force of touch may be sufficient to interfere with light. Systems made according to the above inventive aspect, may be actuated by an interaction in proximity to the pad, thus requiring no force at all to be applied on the surface.
  • the optical touch pad may be incorporated into the surface of a display unit such as a plasma screen thus giving the impression to the viewer that the optical touch pad is an integral part of the display unit.
  • one or more light emitters emit a beam onto a limited area of the substrate and an individual detector is employed for the or each light emitter.
  • This configuration has optimum responsiveness and enhanced accuracy of operation.
  • a plurality of light detectors are employed each being set to detect an interference on a specific area of the substrate and global light emission means are employed. This configuration does away with the requirement of having individual light emitting diodes. It is also particularly cost-efficient as it has a reduced number of components.
  • an operator uses a hand-held device to interfere with the substrate.
  • the hand-held device may be a pen-like device which may even emit light perceptible to be detected by the touch pad which would then not require specific light emitters for each area of actuation.
  • the light emitted is of relatively high frequencies and the light detectors are set for operation at said high frequencies and not to be effected by changes of relatively low frequencies.
  • This mode of operation allows efficient operation of a keyboard in natural environments where the light frequencies are generally of low values.
  • the pad incorporates a direct current light source to illuminate it and the detectors are set to discount said direct current light.
  • This configuration may be particularly advantageous for operation in obscure environments.
  • the substrate comprises an inner transparent layer with markings and an outer transparent layer without any such markings.
  • the configuration effectively protects the markings layer by reducing any wear and tear that would normally occur on conventional pads where markings are exposed. This configuration has increased longevity when compared with prior art touch pads.
  • Figure 1 shows a schematic view of an optical touch pad in accordance with a first embodiment of the invention.
  • Figure 2 is a schematic representation of a second embodiment of an optical touch pad.
  • Figure 3 is a representation of plasma screen with an optical touch pad.
  • Figure 4 is a representation of a hot tub mcorporating a touch pad.
  • Figure 5 shows a flow diagram for a light switch arrangement of optical touch pads.
  • Figure 1 shows an optical touch pad generally referenced 1 having an upper translucent sheet 2 and a circuit board 3 located beneath the sheet.
  • the sheet may be made out of glass (preferably toughened glass), polycarbonate or any other appropriate material selected by the person skilled in the art from known alternatives.
  • Circuit board 3 has mounted on its top surface photo-couples such as that referenced 4.
  • Each photo-couple is formed from a light emitting diode (LED) such as that referenced 5 and a photo-diode (in other words, a photo-detector) such as that referenced 6.
  • the photo- couple may be set to operate at relatively high frequencies. When the LED beams light onto an area such as that referenced 7, the light may normally be transmitted through the sheet. When an interference occurs, such as an operator placing his/her finger on area 7 or in proximity thereto, the beam of light, instead of going through the substrate, tends to be reflected towards photo-diode 6.
  • the change in optical qualities detected by the photo- diode is converted into an electrical signal which the controller transposes into an action.
  • the controller will cause the appropriate action to occur such as the displaying of a letter corresponding to a letter key.
  • the controller may be the confirmation accepting the withdrawal of a given amount of money.
  • the controller will simply cause the switching on or off of a light.
  • Other applications are envisaged within the scope of the present invention such as a touch pad incorporated into any one of the following: an overhead projector, a remote control, a medical operating apparatus, a control station, a control cubical, a kiosk, a supermarket trolley, a dashboard and a sld-lift. Some other applications are described in detail hereinafter.
  • the photo-couples such as that referenced 4 in figure 1 may be set to operate within a specific range of frequencies.
  • the range will be preferably selected to be sufficiently different from other common light sources which may be in the vicinity of a touch pad in a particular application. It is thought to be preferable for the light emitted to be at a high frequency since most commonly available light sources emit at relatively low frequencies. Appropriate electronic circuitry elements will be provided to discount certain frequencies to avoid any discrepancies in the actions triggered by an operator's interference with the sheet referenced 2.
  • the invention envisages the use of a global light source such as a cold strip tube.
  • a global light source such as a cold strip tube.
  • the circuit board may be painted over by white solder resist so that light emitted from the rubes is reflected.
  • Means for amplifying the change in light level detected by the photo-diodes may be employed. The amplified signal can then be used by the controller to switch the state of a logic circuit to trigger an action.
  • the cold tubes may operate at a frequency of say 43 KHz.
  • the photo-diode circuit may be tuned to this particular frequency in order to reject any other light source which could otherwise cause unwanted actions to take place.
  • the identities of the areas of interference may be labelled beneath the sheet of glass of polycarbonate onto a separate transparent coloured film. The film may be placed between the photo-diodes and the top translucent plate which is touched by an operator. The light reflected off the white solder resist at this particular frequency will illuminate the keys which will allow the keyboard to be used in relatively obscure environments.
  • Figure 2 shows a touch pad generally referenced 8 with a light source 9 emitted sideways onto the translucent sheet 10 so that when an operator places a finger 11 on a given area of the sheet 10, the light will scatter at point 12. This interference will then be detected by a light detector such as that referenced 13. A controller will then be employed to trigger an appropriate action in response to the interference.
  • FIG. 3 shows a plasma screen 14 alongside a touch pad 15 of the kind described with reference to figures 1 and 2 above.
  • the controller in this application may cause the plasma screen to switch on and off or to effect volume changes or any other appropriate action associated with a conventional plasma screen.
  • Figure 4 shows a hot tub generally referenced 16 filled with water.
  • a touch pad 17 with a single photo-couple 18 and a translucent plate 19 associated with means to seal the photo couple from the water.
  • a controller may be provided so that when an operator interferes with the light beamed onto sheet 19, a jet such as that referenced 20 is actuated. This system gives complete electrical isolation for safety purposes.
  • Figure 5 shows a group of four light switches referenced 21 which may incorporate optical trigger means similar to those described with reference to the preceding figures.
  • a power control may be employed to minimise the energy consumed by the various light emitters.
  • the power controller may allow an operator to switch off the light switches for a given period.
  • Other forms of light switch control will be envisaged by the person skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)

Abstract

La présente invention se rapporte à un bloc à effleurement optique (1), comportant un ou plusieurs émetteurs de lumière (5), un substrat (2) sur lequel la lumière émise est transmise, un détecteur optique (6) qui détecte des changements dans les propriétés de la lumière qu'il reçoit et une unité de commande conçue pour effectuer une action prédéterminée en réponse auxdits changements détectés. Dans un premier mode de fonctionnement, une intensité lumineuse prédéterminée est émise à travers le substrat (2) et ceci n'engendre aucune action par l'unité de commande, et dans un second mode de fonctionnement, lorsqu'un opérateur touche presque ou touche ledit substrat (2) de sorte que se produit une interférence avec la lumière transmise sur le substrat (2), ceci provoque un changement de la lumière détectée en réponse auquel l'unité de commande effectue une action prédéterminée.
PCT/GB2005/002337 2004-06-19 2005-06-13 Bloc a effleurement optique WO2005125011A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0413747A GB0413747D0 (en) 2004-06-19 2004-06-19 Optical keyboard
GB0413747.7 2004-06-19

Publications (1)

Publication Number Publication Date
WO2005125011A1 true WO2005125011A1 (fr) 2005-12-29

Family

ID=32750219

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/002337 WO2005125011A1 (fr) 2004-06-19 2005-06-13 Bloc a effleurement optique

Country Status (2)

Country Link
GB (1) GB0413747D0 (fr)
WO (1) WO2005125011A1 (fr)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008004103A2 (fr) * 2006-07-06 2008-01-10 Flatfrog Laboratories Ab Pavé tactile optique permettant de déterminer une position dans les trois dimensions
WO2009027773A1 (fr) * 2007-08-31 2009-03-05 Sony Ericsson Mobile Communications Ab Dispositif de communication portatif comportant un écran d'affichage à saisie tactile dans le proche infrarouge
US7995039B2 (en) 2005-07-05 2011-08-09 Flatfrog Laboratories Ab Touch pad system
US8013845B2 (en) 2005-12-30 2011-09-06 Flatfrog Laboratories Ab Optical touch pad with multilayer waveguide
US8031186B2 (en) 2006-07-06 2011-10-04 Flatfrog Laboratories Ab Optical touchpad system and waveguide for use therein
WO2012034577A1 (fr) * 2010-09-13 2012-03-22 Sony Ericsson Mobile Communications Ab Dispositif tactile et dispositif de communication utilisant celui-ci
US9063617B2 (en) 2006-10-16 2015-06-23 Flatfrog Laboratories Ab Interactive display system, tool for use with the system, and tool management apparatus
EP3035534A1 (fr) * 2014-12-17 2016-06-22 Thales Clavier a fiabilite amelioree
US9874978B2 (en) 2013-07-12 2018-01-23 Flatfrog Laboratories Ab Partial detect mode
US10019113B2 (en) 2013-04-11 2018-07-10 Flatfrog Laboratories Ab Tomographic processing for touch detection
US10126882B2 (en) 2014-01-16 2018-11-13 Flatfrog Laboratories Ab TIR-based optical touch systems of projection-type
US10146376B2 (en) 2014-01-16 2018-12-04 Flatfrog Laboratories Ab Light coupling in TIR-based optical touch systems
US10161886B2 (en) 2014-06-27 2018-12-25 Flatfrog Laboratories Ab Detection of surface contamination
US10168835B2 (en) 2012-05-23 2019-01-01 Flatfrog Laboratories Ab Spatial resolution in touch displays
US10282035B2 (en) 2016-12-07 2019-05-07 Flatfrog Laboratories Ab Touch device
US10318074B2 (en) 2015-01-30 2019-06-11 Flatfrog Laboratories Ab Touch-sensing OLED display with tilted emitters
US10401546B2 (en) 2015-03-02 2019-09-03 Flatfrog Laboratories Ab Optical component for light coupling
US10437389B2 (en) 2017-03-28 2019-10-08 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US10474249B2 (en) 2008-12-05 2019-11-12 Flatfrog Laboratories Ab Touch sensing apparatus and method of operating the same
US10481737B2 (en) 2017-03-22 2019-11-19 Flatfrog Laboratories Ab Pen differentiation for touch display
US10496227B2 (en) 2015-02-09 2019-12-03 Flatfrog Laboratories Ab Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel
US10761657B2 (en) 2016-11-24 2020-09-01 Flatfrog Laboratories Ab Automatic optimisation of touch signal
US11182023B2 (en) 2015-01-28 2021-11-23 Flatfrog Laboratories Ab Dynamic touch quarantine frames
US11256371B2 (en) 2017-09-01 2022-02-22 Flatfrog Laboratories Ab Optical component
US11301089B2 (en) 2015-12-09 2022-04-12 Flatfrog Laboratories Ab Stylus identification
US11474644B2 (en) 2017-02-06 2022-10-18 Flatfrog Laboratories Ab Optical coupling in touch-sensing systems
US11567610B2 (en) 2018-03-05 2023-01-31 Flatfrog Laboratories Ab Detection line broadening
US11893189B2 (en) 2020-02-10 2024-02-06 Flatfrog Laboratories Ab Touch-sensing apparatus
US11943563B2 (en) 2019-01-25 2024-03-26 FlatFrog Laboratories, AB Videoconferencing terminal and method of operating the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701747A (en) * 1985-04-16 1987-10-20 Ncr Corporation Data input system including a keyboard having no moving parts
EP1154573A1 (fr) * 2000-05-10 2001-11-14 Diehl AKO Stiftung & Co. KG Clavier de commande à touches sensitives
US6344918B1 (en) * 1999-03-29 2002-02-05 Bayer Aktiengesellschaft Electrochromic contrast-plate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701747A (en) * 1985-04-16 1987-10-20 Ncr Corporation Data input system including a keyboard having no moving parts
US6344918B1 (en) * 1999-03-29 2002-02-05 Bayer Aktiengesellschaft Electrochromic contrast-plate
EP1154573A1 (fr) * 2000-05-10 2001-11-14 Diehl AKO Stiftung & Co. KG Clavier de commande à touches sensitives

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7995039B2 (en) 2005-07-05 2011-08-09 Flatfrog Laboratories Ab Touch pad system
US8013845B2 (en) 2005-12-30 2011-09-06 Flatfrog Laboratories Ab Optical touch pad with multilayer waveguide
WO2008004103A3 (fr) * 2006-07-06 2008-07-24 Flatfrog Lab Ab Pavé tactile optique permettant de déterminer une position dans les trois dimensions
US8031186B2 (en) 2006-07-06 2011-10-04 Flatfrog Laboratories Ab Optical touchpad system and waveguide for use therein
US8094136B2 (en) 2006-07-06 2012-01-10 Flatfrog Laboratories Ab Optical touchpad with three-dimensional position determination
WO2008004103A2 (fr) * 2006-07-06 2008-01-10 Flatfrog Laboratories Ab Pavé tactile optique permettant de déterminer une position dans les trois dimensions
US9063617B2 (en) 2006-10-16 2015-06-23 Flatfrog Laboratories Ab Interactive display system, tool for use with the system, and tool management apparatus
WO2009027773A1 (fr) * 2007-08-31 2009-03-05 Sony Ericsson Mobile Communications Ab Dispositif de communication portatif comportant un écran d'affichage à saisie tactile dans le proche infrarouge
US10474249B2 (en) 2008-12-05 2019-11-12 Flatfrog Laboratories Ab Touch sensing apparatus and method of operating the same
US8711114B2 (en) 2010-09-13 2014-04-29 Sony Corporation Touch-sensitive device and communication device
WO2012034577A1 (fr) * 2010-09-13 2012-03-22 Sony Ericsson Mobile Communications Ab Dispositif tactile et dispositif de communication utilisant celui-ci
US10168835B2 (en) 2012-05-23 2019-01-01 Flatfrog Laboratories Ab Spatial resolution in touch displays
US10019113B2 (en) 2013-04-11 2018-07-10 Flatfrog Laboratories Ab Tomographic processing for touch detection
US9874978B2 (en) 2013-07-12 2018-01-23 Flatfrog Laboratories Ab Partial detect mode
US10126882B2 (en) 2014-01-16 2018-11-13 Flatfrog Laboratories Ab TIR-based optical touch systems of projection-type
US10146376B2 (en) 2014-01-16 2018-12-04 Flatfrog Laboratories Ab Light coupling in TIR-based optical touch systems
US10161886B2 (en) 2014-06-27 2018-12-25 Flatfrog Laboratories Ab Detection of surface contamination
FR3030797A1 (fr) * 2014-12-17 2016-06-24 Thales Sa Clavier a fiabilite amelioree
US9778753B2 (en) 2014-12-17 2017-10-03 Thales Keyboard with improved reliability
EP3035534A1 (fr) * 2014-12-17 2016-06-22 Thales Clavier a fiabilite amelioree
US11182023B2 (en) 2015-01-28 2021-11-23 Flatfrog Laboratories Ab Dynamic touch quarantine frames
US10318074B2 (en) 2015-01-30 2019-06-11 Flatfrog Laboratories Ab Touch-sensing OLED display with tilted emitters
US11029783B2 (en) 2015-02-09 2021-06-08 Flatfrog Laboratories Ab Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel
US10496227B2 (en) 2015-02-09 2019-12-03 Flatfrog Laboratories Ab Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel
US10401546B2 (en) 2015-03-02 2019-09-03 Flatfrog Laboratories Ab Optical component for light coupling
US11301089B2 (en) 2015-12-09 2022-04-12 Flatfrog Laboratories Ab Stylus identification
US10761657B2 (en) 2016-11-24 2020-09-01 Flatfrog Laboratories Ab Automatic optimisation of touch signal
US11579731B2 (en) 2016-12-07 2023-02-14 Flatfrog Laboratories Ab Touch device
US10775935B2 (en) 2016-12-07 2020-09-15 Flatfrog Laboratories Ab Touch device
US11281335B2 (en) 2016-12-07 2022-03-22 Flatfrog Laboratories Ab Touch device
US10282035B2 (en) 2016-12-07 2019-05-07 Flatfrog Laboratories Ab Touch device
US11740741B2 (en) 2017-02-06 2023-08-29 Flatfrog Laboratories Ab Optical coupling in touch-sensing systems
US11474644B2 (en) 2017-02-06 2022-10-18 Flatfrog Laboratories Ab Optical coupling in touch-sensing systems
US10481737B2 (en) 2017-03-22 2019-11-19 Flatfrog Laboratories Ab Pen differentiation for touch display
US11099688B2 (en) 2017-03-22 2021-08-24 Flatfrog Laboratories Ab Eraser for touch displays
US11016605B2 (en) 2017-03-22 2021-05-25 Flatfrog Laboratories Ab Pen differentiation for touch displays
US10606414B2 (en) 2017-03-22 2020-03-31 Flatfrog Laboratories Ab Eraser for touch displays
US10739916B2 (en) 2017-03-28 2020-08-11 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US11281338B2 (en) 2017-03-28 2022-03-22 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US10845923B2 (en) 2017-03-28 2020-11-24 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US11269460B2 (en) 2017-03-28 2022-03-08 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US10606416B2 (en) 2017-03-28 2020-03-31 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US10437389B2 (en) 2017-03-28 2019-10-08 Flatfrog Laboratories Ab Touch sensing apparatus and method for assembly
US11256371B2 (en) 2017-09-01 2022-02-22 Flatfrog Laboratories Ab Optical component
US11650699B2 (en) 2017-09-01 2023-05-16 Flatfrog Laboratories Ab Optical component
US11567610B2 (en) 2018-03-05 2023-01-31 Flatfrog Laboratories Ab Detection line broadening
US11943563B2 (en) 2019-01-25 2024-03-26 FlatFrog Laboratories, AB Videoconferencing terminal and method of operating the same
US11893189B2 (en) 2020-02-10 2024-02-06 Flatfrog Laboratories Ab Touch-sensing apparatus

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