[go: up one dir, main page]

WO2008038275A2 - Écran tactile optique - Google Patents

Écran tactile optique Download PDF

Info

Publication number
WO2008038275A2
WO2008038275A2 PCT/IL2007/001179 IL2007001179W WO2008038275A2 WO 2008038275 A2 WO2008038275 A2 WO 2008038275A2 IL 2007001179 W IL2007001179 W IL 2007001179W WO 2008038275 A2 WO2008038275 A2 WO 2008038275A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
touch panel
optical
panel according
optical fiber
Prior art date
Application number
PCT/IL2007/001179
Other languages
English (en)
Other versions
WO2008038275A3 (fr
Inventor
Klony Lieberman
Yuval Sharon
Yossi Chay
Original Assignee
Lumio Inc.
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
Priority claimed from US11/691,508 external-priority patent/US7302156B1/en
Priority claimed from US11/691,510 external-priority patent/US7333094B2/en
Priority claimed from US11/776,563 external-priority patent/US7333095B1/en
Application filed by Lumio Inc. filed Critical Lumio Inc.
Priority to JP2009529854A priority Critical patent/JP5415954B2/ja
Publication of WO2008038275A2 publication Critical patent/WO2008038275A2/fr
Publication of WO2008038275A3 publication Critical patent/WO2008038275A3/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre

Definitions

  • the present invention relates generally to optical systems which include optical fibers and optical light guides and more particularly to optical touch panels and optical assemblies useful therein.
  • the present invention seeks to provide an improved optical touch screen or touch panel.
  • the optical power of the at least one optical fiber at the at least one light transmissive region and the at least one light scattering discontinuity are operative to direct light, received from the light source along the at least one optical fiber and scattered by the at least one light scattering discontinuity, directly from the at least one discontinuity through the cladding, generally in a plane extending in a direction generally away from the at least one discontinuity.
  • the at least one light transmissive region is located generally opposite the at least one light scattering discontinuity about the circumference of the at least one optical fiber.
  • the at least one optical fiber extends along at least most of a periphery of a light curtain area and the at least one.
  • the optical touch panel may also include at least one light curtain impingement sensor operative to sense impingement of the light curtain and to produce impingement output signals including two-dimensional impingement location information and output signal processing circuitry for providing an output indication of a two-dimensional impingement location.
  • the at least one optical fiber extends along at least most of a periphery of a light curtain area and the at least one light scattering discontinuity includes a plurality of light scattering discontinuities distributed along the periphery, whereby the plurality of light scattering discontinuities direct light generally in a plane, filling the interior of the periphery and thereby together defining a light curtain therewithin.
  • light scattering functionality of the at least one discontinuity varies along the length of the at least one optical fiber to provide compensation for attenuation produced by the optical fiber.
  • the optical power of the at least one optical fiber at the at least one light transmissive region and the at least one light scattering discontinuity having varying light scattering functionality being operative to direct light, received from the light source along the at least one optical fiber and scattered by the at least one light scattering discontinuity, directly from the at least one discontinuity through the cladding, generally in a plane extending in a direction generally away from the at least one discontinuity and having generally uniform intensity.
  • the at least one optical fiber has a non-spherical cross section and the at least one discontinuity is located precisely at a focus of the at least one light transmissive region.
  • the optical power of the at least one optical fiber having a non-spherical cross section and the at least one light transmissive region and the at least one light scattering discontinuity located precisely at the focus of the at least one light transmissive region being operative to direct light, received from the light source along the at least one optical fiber and scattered by the at least one light scattering discontinuity, directly from the at least one discontinuity through the cladding, generally in a plane of uniform thickness extending in a direction generally away from the at least one discontinuity.
  • an optical touch panel including a support defining a generally planar surface, an optical illumination assembly arranged along and above at least part of a periphery of the support to define a detection region, the assembly including at least one light guide, the at least one light guide having at least one light scatterer, the at least one light guide having optical power at at least one surface having a focus located in proximity to the light scatterer and at least one light source arranged for directing light along the at least one light guide, the optical power of the at least one light guide and the at least one light scatterer being operative to direct light, received from the at least one light source along the at least one light guide and scattered by the at least one light scatterer, generally in a plane parallel to the generally planar surface, at least one light detector, arranged to detect changes in the light received from the optical illumination assembly produced by the presence of an object in the detection region and detection circuitry receiving at least one output from the at least one light detector and providing an output indication of the two dimensional location of object imp
  • the at least one light guide extends along at least most of a periphery of a light curtain area parallel to the generally planer surface and the at least one light scatterer extends along the periphery of the light curtain area, providing a generally uniform distribution of light in the plane, filling the interior of the periphery of the light curtain area and thereby defining a light curtain therewithin.
  • the optical touch panel also may include at least one light curtain impingement sensor operative to sense impingement of the light curtain and to produce impingement output signals including two-dimensional impingement location information and output signal processing circuitry for providing an output indication of a two-dimensional impingement location.
  • the at least one light guide includes a single light guide and the at least one light source includes two light sources, a single light source being placed at each end of the single light guide. Additionally or alternatively, the at least one light source is located only at a corner of the periphery of the detection region.
  • the detection circuitry operates at least partially by triangulation.
  • the at least one light guide has a non-spherical cross section and the at least one light scatterer is located precisely at a focus of the at least one surface.
  • the non-spherical cross section may include a curved forward portion having optical power.
  • the non-spherical cross section may include generally parallel intermediate portions.
  • the non-spherical cross section may include tapering rearward portions which meet at a relatively narrow rearward strip portion.
  • the at least one light scatterer includes a layer of light scattering paint.
  • the optical touch panel also includes an elongate transparent mounting and window defining guide fixed to the support. Additionally, the elongate transparent mounting and window defining guide may be operative to ensure correct alignment of the optical illumination assembly relative to the support. Additionally or alternatively, the elongate transparent mounting and window defining guide has a U- shaped cross section. Additionally or alternatively, the elongate transparent mounting and window defining guide is operative to minimize light loss from the at least one light guide.
  • FIGs. IA and IB are simplified illustrations of a touch panel constructed and operative in accordance with two alternative preferred embodiments of the present invention.
  • Figs. 2A, 2B, 2C and 2D are each a simplified, partially sectional, partially pictorial illustration of a portion of an optical fiber assembly useful in the touch panel of Fig. IA;
  • Figs. 2E, 2F, 2G and 2H are each a simplified, partially sectional, partially pictorial illustration of a portion of an optical assembly useful in the touch panel of Fig. IB;
  • Fig. 3 is a simplified illustration of an optical fiber assembly structure useful in the touch panel of Fig. IA and providing attenuation compensation;
  • Figs. 4A and 4B are simplified sectional illustrations of the optical fiber assembly structure of Fig. 3, taken along respective lines IVA - IVA and IVB - IVB;
  • Fig. 6 is a simplified sectional illustration of the optical fiber assembly structure of Fig. 5, taken along lines VI - VI;
  • Fig. 7 is a simplified illustration of an optical assembly structure useful in the touch panel of Fig. IB and providing attenuation compensation; and Figs. 8A and 8B are simplified sectional illustrations of the optical assembly structure of Fig. 7, taken along respective lines VIIIA - VIIIA and VIIIB - VIIIB. ⁇ DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
  • the touch panel 100 comprises an optical illumination assembly 102 which is preferably arranged along and above all or part of the periphery of a support 104, typically a glass plate. Alternatively, the glass plate may be obviated and the support 104 may be a frame (not shown). Typically, the optical fiber illumination assembly 102 extends along three of four edges of a generally planar detection region 105.
  • the . optical illumination assembly 102 receives illumination from light sources 106, such as an LED or a diode laser, and preferably an infrared laser or LED, disposed at each end 108 of assembly 102.
  • light sources 106 such as an LED or a diode laser, and preferably an infrared laser or LED, disposed at each end 108 of assembly 102.
  • a single light source 106 may be employed, disposed at one end 108 of the assembly 102.
  • light sources 106 are preferably located at a corner of the periphery of the generally planar detection region 105.
  • the optical illumination assembly 102 comprises at least one light guide 110, such as an optical fiber 111 having a core 112 and cladding 114, such as an ESKA plastic optical fiber commercially available from Mitsubishi, which has a circular cross section.
  • the cladding 114 preferably has at least one light scatterer 116, such as a light scattering discontinuity at at least one location therealong, preferably opposite at least one light transmissive region 117 of the light guide 110, at which region the light guide 110 has optical power.
  • light scatterer 116 is preferably defined by forming a scratch extending entirely through the cladding 114 along at least a substantial portion of the entire length of the optical fiber illumination assembly 102.
  • the scratch may, but need not necessarily, penetrate into the core 112.
  • the optical illumination assembly 102 comprises at least one light guide 110, such as a plastic rod, which preferably has at least one light scatterer 116 at at least one location therealong, preferably opposite at least one light transmissive region 117 of the light guide 110, at which region 117 the light guide 110 has optical power.
  • a surface of light guide 110 at transmissive region 117 preferably has a focus located in proximity to light scatterer 116.
  • light scatterer 116 is preferably defined by a narrow strip of white paint extending along the plastic rod along at least a substantial portion of the entire length of the optical illumination assembly 102.
  • the at least one light scatterer 116 is operative to scatter light which is received from the light source 106 and passes along the at least one light guide 110.
  • the optical power of the light guide 110 at the at least one light transmissive region 117 collimates and directs the scattered light in a direction generally away from scatterer 116, as indicated generally by reference numeral 118. It is appreciated that generally every location in generally planar detection region 105 receives light generally from every location along the at least one light transmissive region 117.
  • the at least one light guide 110 extends along a periphery of a light curtain area defined by the detection region 105 and the at ⁇ least one light scatterer 116 includes a plurality of separate light scatterers distributed along the periphery, whereby the plurality of light scatterers direct light generally in a plane, filling the interior of the periphery and thereby together defining a light curtain therewithin.
  • Impingement of an object, such as a stylus or finger 120, upon support 104 preferably is sensed by one or more light detectors 122, preferably disposed along an edge of detection region 105 along which the optical illumination assembly 102 does not extend.
  • the detectors detect changes in the light received from the optical illumination assembly 102 produced by the presence of finger 120 in the detection region 105.
  • detectors 122 are located in the same plane as the optical illumination assembly 102.
  • two detectors are sufficient to detect finger 120 anywhere in the detection region 105, each detector being located at an adjacent corner of the detection region 105 and having at least 90 degree coverage, as shown.
  • detectors 122 are each linear CMOS sensors, such as an RPLIS-2048 linear image sensor commercially available from Panavision SVI, LLC of One Technology Place, Homer, New York, which are suitable for use in triangulation.
  • the outputs of detectors 122 are supplied to detection circuitry 124, such as that described in assignee's U.S. Published Patent Application 2006/0187198 and U.S. Provisional Applications 60/819,891; 60/832,508 and 60/889,746, the disclosures of which are hereby incorporated by reference, which provides an output indication of the two dimensional location of the finger 120 impingement in the detection region 105.
  • Figs. 2A 3 2B, 2C and 2D are each a simplified, partially sectional, partially pictorial illustration of a portion of an optical assembly useful in the touch panel of Fig. IA.
  • Fig. 2A illustrates the use of an optical fiber 200 having a circular cross section, a core 212 and cladding 214, such as an ESKA plastic optical fiber commercially available from Mitsubishi, having a discontinuity 216 in the form of a longitudinal scratch which extends through cladding 214 and penetrates core 212.
  • the surfaces 220 defined by the scratch scatter light in the core.
  • a curved light transmissive region 222 lying opposite the discontinuity 216 has optical power and acts generally to collimate the scattered light, as shown, in a plane 224 extending in a direction, indicated- by arrows 226, away from the discontinuity 216.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Position Input By Displaying (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un écran tactile optique comprenant un support, un ensemble éclairage à fibre optique disposé le long et au-dessus d'au moins une partie d'une zone périphérique du support pour définir une zone de détection. Cet ensemble comprend au moins une fibre optique et une source lumineuse conçue pour diriger la lumière le long de la/des fibre(s) optique(s), au moins un détecteur de lumière conçu pour détecter les modifications de la lumière émise par l'ensemble éclairage à fibre optique qui résultent de la présence d'un objet dans la zone de détection, et des circuits de détection recevant au moins une entrée du/des détecteur(s) de lumière et fournissant une indication de sortie sur la position bidimensionnelle de l'incidence de l'objet dans la zone de détection.
PCT/IL2007/001179 2006-09-28 2007-09-25 Écran tactile optique WO2008038275A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009529854A JP5415954B2 (ja) 2006-09-28 2007-09-25 光学式タッチパネル

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US82722306P 2006-09-28 2006-09-28
US60/827,223 2006-09-28
US11/691,508 2007-03-27
US11/691,510 2007-03-27
US11/691,508 US7302156B1 (en) 2006-07-12 2007-03-27 Optical system
US11/691,510 US7333094B2 (en) 2006-07-12 2007-03-27 Optical touch screen
US11/776,563 2007-07-12
US11/776,563 US7333095B1 (en) 2006-07-12 2007-07-12 Illumination for optical touch panel

Publications (2)

Publication Number Publication Date
WO2008038275A2 true WO2008038275A2 (fr) 2008-04-03
WO2008038275A3 WO2008038275A3 (fr) 2009-04-23

Family

ID=39230668

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2007/001179 WO2008038275A2 (fr) 2006-09-28 2007-09-25 Écran tactile optique

Country Status (3)

Country Link
JP (1) JP5415954B2 (fr)
KR (1) KR20090077771A (fr)
WO (1) WO2008038275A2 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010073047A1 (fr) 2008-12-24 2010-07-01 Light Blue Optics Limited Dispositif d'affichage d'image sensible au toucher
FR2942326A1 (fr) * 2009-02-18 2010-08-20 Faurecia Interieur Ind Ensemble de guidage de lumiere
WO2010137843A3 (fr) * 2009-05-26 2011-03-17 Kim Ki Su Écran tactile adoptant un système de balayage infrarouge
EP2372507A1 (fr) * 2010-03-31 2011-10-05 San Ho Enterprise Co., Ltd. Module de guide lumineux
WO2012172364A2 (fr) 2011-06-16 2012-12-20 Light Blue Optics Ltd Dispositifs d'affichage tactile
WO2012172363A2 (fr) 2011-06-16 2012-12-20 Light Blue Optics Ltd Dispositifs d'affichage tactiles
WO2012172360A2 (fr) 2011-06-16 2012-12-20 Light Blue Optics Ltd Dispositifs d'affichage tactiles
WO2013054096A1 (fr) 2011-10-11 2013-04-18 Light Blue Optics Limited Dispositifs d'affichage tactiles
JP2013513852A (ja) * 2009-12-11 2013-04-22 キム，ソン−ハン 光学式タッチスクリーン
WO2013108032A1 (fr) 2012-01-20 2013-07-25 Light Blue Optics Limited Dispositifs d'affichage d'image tactiles
WO2013108031A2 (fr) 2012-01-20 2013-07-25 Light Blue Optics Limited Dispositifs d'affichage d'images tactiles
WO2013144599A2 (fr) 2012-03-26 2013-10-03 Light Blue Optics Ltd Systèmes de détection tactile

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011229745C1 (en) * 2010-03-24 2015-01-29 Neonode Inc. Lens arrangement for light-based touch screen
KR101155923B1 (ko) * 2010-07-23 2012-06-20 삼성에스디아이 주식회사 광 주사형 터치 패널
FR2976093B1 (fr) * 2011-06-01 2013-08-16 Thales Sa Systeme tactile a emetteurs et recepteurs optiques
JP6566044B2 (ja) 2015-12-02 2019-08-28 株式会社リコー 位置検出装置、画像表示装置及び画像表示システム

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5432876C1 (en) * 1992-10-19 2002-05-21 Minnesota Mining & Mfg Illumination devices and optical fibres for use therein
NZ330157A (en) * 1996-01-19 2000-02-28 Lumenyte Internat Corp Optical fiber for linearly guiding light and emitting the light out of the sides of the fiber
JP2000039519A (ja) * 1998-07-24 2000-02-08 Bridgestone Corp 光伝送チューブ及びその製造方法
JP2000222110A (ja) * 1999-01-29 2000-08-11 Ricoh Elemex Corp 座標入力装置
JP2000222111A (ja) * 1999-01-29 2000-08-11 Ricoh Elemex Corp 座標入力装置および電子黒板システム
JP2001297603A (ja) * 2000-04-12 2001-10-26 Bridgestone Corp 線状発光体
JP2002372630A (ja) * 2001-04-10 2002-12-26 Bridgestone Corp 線状発光体
JP2003280802A (ja) * 2002-03-22 2003-10-02 Canon Inc 座標入力装置
US7099553B1 (en) * 2003-04-08 2006-08-29 Poa Sona, Inc. Apparatus and method for generating a lamina of light
WO2005102003A2 (fr) * 2004-04-16 2005-11-03 Fiberstars Incorporated Luminaire a bon rendement a extraction de lumiere lateralement dirigee
US7538759B2 (en) * 2004-05-07 2009-05-26 Next Holdings Limited Touch panel display system with illumination and detection provided from a single edge

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010073047A1 (fr) 2008-12-24 2010-07-01 Light Blue Optics Limited Dispositif d'affichage d'image sensible au toucher
WO2010073045A2 (fr) 2008-12-24 2010-07-01 Light Blue Optics Ltd Dispositif d'affichage
US9557855B2 (en) 2008-12-24 2017-01-31 Promethean Limited Touch sensitive holographic displays
US8947401B2 (en) 2008-12-24 2015-02-03 Light Blue Optics Ltd Display device
US8947402B2 (en) 2008-12-24 2015-02-03 Light Blue Optics Ltd Touch sensitive image display
US8514194B2 (en) 2008-12-24 2013-08-20 Light Blue Optics Ltd Touch sensitive holographic displays
FR2942326A1 (fr) * 2009-02-18 2010-08-20 Faurecia Interieur Ind Ensemble de guidage de lumiere
WO2010137843A3 (fr) * 2009-05-26 2011-03-17 Kim Ki Su Écran tactile adoptant un système de balayage infrarouge
KR101129430B1 (ko) 2009-05-26 2012-04-13 주식회사 에이에프오 적외선 스캔 방식의 터치스크린 장치
JP2013513852A (ja) * 2009-12-11 2013-04-22 キム，ソン−ハン 光学式タッチスクリーン
US8780087B2 (en) 2009-12-11 2014-07-15 Sung-han Kim Optical touch screen
EP2372507A1 (fr) * 2010-03-31 2011-10-05 San Ho Enterprise Co., Ltd. Module de guide lumineux
WO2012172360A2 (fr) 2011-06-16 2012-12-20 Light Blue Optics Ltd Dispositifs d'affichage tactiles
WO2012172363A2 (fr) 2011-06-16 2012-12-20 Light Blue Optics Ltd Dispositifs d'affichage tactiles
WO2012172364A2 (fr) 2011-06-16 2012-12-20 Light Blue Optics Ltd Dispositifs d'affichage tactile
US9524061B2 (en) 2011-06-16 2016-12-20 Promethean Limited Touch-sensitive display devices
WO2013054096A1 (fr) 2011-10-11 2013-04-18 Light Blue Optics Limited Dispositifs d'affichage tactiles
WO2013108032A1 (fr) 2012-01-20 2013-07-25 Light Blue Optics Limited Dispositifs d'affichage d'image tactiles
WO2013108031A2 (fr) 2012-01-20 2013-07-25 Light Blue Optics Limited Dispositifs d'affichage d'images tactiles
WO2013144599A2 (fr) 2012-03-26 2013-10-03 Light Blue Optics Ltd Systèmes de détection tactile

Also Published As

Publication number Publication date
JP5415954B2 (ja) 2014-02-12
JP2010505178A (ja) 2010-02-18
WO2008038275A3 (fr) 2009-04-23
KR20090077771A (ko) 2009-07-15

Similar Documents

Publication Publication Date Title
US7333095B1 (en) Illumination for optical touch panel
US7573465B2 (en) Optical touch panel
WO2008038275A2 (fr) Écran tactile optique
US7302156B1 (en) Optical system
US20080192015A1 (en) Enhanced Triangulation
JP2010505178A5 (fr)
CN103492989B (zh) 触敏设备及与其相关的光学耦合元件和光学触摸面板
US20150331547A1 (en) Edge-coupled touch-sensitive apparatus
US20220291774A1 (en) Optical component
US20090200453A1 (en) Optical Touch Screen Assembly
CN107250855A (zh) 用于光耦合的光学部件
US20110074734A1 (en) Detecting the location of an object on a touch surface
EP2126673A2 (fr) Détermination de position dans les systèmes d'interface optiques
US20150035799A1 (en) Optical touchscreen
US20220221955A1 (en) Improved touch sensing apparatus
CN104793808A (zh) 光学式触控装置
JP2009258967A (ja) タッチパネル
WO2013094376A1 (fr) Système d'entrée
JP2009093616A (ja) タッチパネル
WO2013132925A1 (fr) Dispositif d'entrée et système d'entrée muni de celui-ci
US8929697B1 (en) Light injection system
JP5813533B2 (ja) 入力装置および入力システム
JP2013250816A (ja) 座標入力装置、及び座標入力システム
TW201239423A (en) Light guide assembly and touch panel
JP2013250812A (ja) 座標入力装置、座標検出方法、及び座標入力システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07827153

Country of ref document: EP

Kind code of ref document: A2

ENP Entry into the national phase

Ref document number: 2009529854

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 1020097007231

Country of ref document: KR

122 Ep: pct application non-entry in european phase

Ref document number: 07827153

Country of ref document: EP

Kind code of ref document: A2