WO2012070719A1 - Dispositif de détection tactile ayant une structure à deux couches - Google Patents

Dispositif de détection tactile ayant une structure à deux couches Download PDF

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Publication number
WO2012070719A1
WO2012070719A1 PCT/KR2011/000442 KR2011000442W WO2012070719A1 WO 2012070719 A1 WO2012070719 A1 WO 2012070719A1 KR 2011000442 W KR2011000442 W KR 2011000442W WO 2012070719 A1 WO2012070719 A1 WO 2012070719A1
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WO
WIPO (PCT)
Prior art keywords
core
path
main
light
branch
Prior art date
Application number
PCT/KR2011/000442
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English (en)
Korean (ko)
Inventor
조기호
이민수
Original Assignee
주식회사 엘엠에스
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Filing date
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Application filed by 주식회사 엘엠에스 filed Critical 주식회사 엘엠에스
Publication of WO2012070719A1 publication Critical patent/WO2012070719A1/fr

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    • 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
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04109—FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location

Definitions

  • the present invention relates to an optical waveguide, and more particularly, to an optical waveguide device composed of two layers.
  • a general optical waveguide is an optical transmission path that traps light waves and propagates low loss in the longitudinal direction.
  • the optical waveguide comprises a core having a large refractive index and a cladding having a low refractive index surrounding the core, and reflecting the internal reflection due to a difference in refractive index between the core and the cladding. It has a principle of transmitting the optical signal by using the basic principle.
  • the optical waveguide is disposed on the substrate in a grid-like grid to form a core, and a cladding is disposed to surround both sides of the core in the transverse direction, and each branch point of two adjacent optical paths among the outermost optical paths of the grid.
  • the optical waveguide for the touch screen may be manufactured by using a splitter formed of a material having a difference between the core and the refractive index.
  • An object of the present invention is to provide a touch panel in which there is no optical loss at an intersection of optical paths using a two-layer optical waveguide, and a sensing efficiency decrease and a detection error do not occur due to the optical loss.
  • Touch sensing device is formed on a rectangular substrate, the substrate, the main light path and the plurality of branch light paths extending in a direction perpendicular to the extension direction of the main light path adjacent to one side of the substrate;
  • a first core made of a material having a refractive index smaller than that of the first core, and formed on the substrate, the first cladding disposed to surround both sides of the optical path in the optical path transverse direction of the first core and the branch optical path on the main optical path of the first core.
  • a plurality of light emitting diodes disposed at a branching position of the plurality of cores and having a refractive index difference from the first core and formed to have a direction angle with respect to the incident light so as to reflect a part of the incident light from the main optical path of the first core in the direction of the branching path of the first core;
  • a second core composed of a plurality of branched optical paths branched in a direction perpendicular to the extending direction of the second core, the material having a refractive index smaller than that of the second core, formed on the substrate, and a second core disposed to surround both sides of the second optical path in the optical path direction; It is disposed at a branching position of the branching path on the cladding and the main optical path of the second core, has a refractive index difference from
  • a light source is disposed at one end of the main light path of the first core and the main light path of the second core, and the sides of the first and second cores adjacent to the main light path are formed adjacent to each other. Arranged along the sides, it may include a plurality of optical sensors arranged to receive light from the exit end of the branch path of the first and second core.
  • the first layer and the second layer are bonded by an adhesive layer
  • the refractive index of the adhesive layer may be smaller than the refractive index of each of the first core and the second core.
  • the adhesive layer may be characterized in that the same material as the first cladding.
  • the splitter may be formed of a material having the same refractive index as the first cladding or the second cladding.
  • the splitter may be formed of air.
  • the substrate may be a resin film or glass.
  • the touch panel of the present invention there is no optical loss at the intersection point of the optical path by using the optical waveguide composed of two layers, and it is possible to accurately sense the touch position in the touch area because the sensing efficiency decrease and the detection error do not occur due to the optical loss. Do.
  • FIG. 1 is a schematic diagram of a touch sensing device according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a touch sensing device according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram illustrating an operating state of a touch sensing device according to an embodiment of the present invention.
  • the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.
  • FIG. 1 is a schematic diagram of a touch sensing device according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view of the touch sensing device according to an embodiment of the present invention
  • Figure 3 is a touch sensing device according to an embodiment of the present invention It is a schematic diagram explaining the operation state of.
  • a touch sensing device is composed of a substrate 120, a first waveguide layer 140, and a second waveguide layer 140.
  • the first waveguide layer 140 formed on the substrate has a first cladding disposed to surround both sides of the first core 100 composed of the main optical path 101 and the branch optical path 102 and the optical path transverse sides of the first core. It consists of 130. It further includes a splitter 103 arranged on the main optical path of the first core at the branch position of the branch optical path.
  • the substrate 120 may be formed of a transparent film or tempered glass in order to operate as a touch sensing device, but is not limited thereto.
  • An opaque substrate may be applied.
  • the second waveguide layer 160 has the same structure as the first waveguide layer 140 and is formed on the first waveguide layer 140. However, the main optical path 201 of the second waveguide layer 160 is disposed such that the main optical path 101 of the first waveguide layer 140 and the extending direction are perpendicular to each other.
  • the first core 100 is formed on the substrate 120.
  • the first core 100 is composed of a main path 101 and a branch path 102, and a splitter existing in the main path 101.
  • the incident light incident from the light source L1 disposed at one end of the main light path 103 is totally reflected through the main light path 101, the incident light splits the advancing incident light toward the branch light path 102.
  • the splitter 103 In order to split the incident light propagating through the main optical path 101 onto the main optical path 101 in the direction of the branch optical path 102, the splitter 103 must have a difference in refractive index from that of the first core 100. . In addition, since there are a plurality of branch light paths 102 in the vertical direction of the main light path 101 in the extending direction, the splitter 103 branches to split the incident light from the main light path 101 into the respective branch light paths 102. There are as many as optical paths 102.
  • the first cladding 130 disposed to surround both sides of the optical path transverse direction of the first core 100 has a difference in refractive index with a material forming the first core 100, and as a result, total internal reflection occurs to transmit an optical signal. .
  • the first cladding 130 has a smaller refractive index than the material of the first core 100, but is not necessarily limited thereto.
  • the second waveguide layer 160 has the same structure as the first waveguide layer 140 and is formed on the first waveguide layer 140.
  • light sources L1 and L2 are disposed at one end of the main light path 101 of the first core and the main light path 201 of the second core, and the opposite sides of the sides where the main light paths of the first and second cores are adjacent to each other.
  • a plurality of optical sensors 110 and 210 are arranged to be able to receive light from the exit ends of the branch paths of the first and second cores.
  • FIG. 2 illustrates a cross-sectional view of the touch sensing device cut along the branching optical path 202 of the second waveguide layer 160.
  • the first waveguide layer 140 and the second waveguide layer 160 are bonded by the adhesive layer 150, the second waveguide layer 160 is formed on the first waveguide layer 140, and the adhesive layer 150 Is bonded. 2 shows the adhesive layer 150, although the same material as the first cladding 130 material may be used.
  • the second waveguide layer 160 is coupled to the upper portion of the first waveguide layer 140, but the branched light paths form a lattice structure to form a touch area.
  • the refractive index of the adhesive layer 150 is preferably smaller than the respective refractive indices of the first and second cores.
  • the branch optical path 202 of the second core 200 is advanced.
  • the total reflection of the light is damaged.
  • a change in the amount of light is detected in the optical sensor 210 of the optical path in which total reflection is damaged.
  • the optical path of is transformed. Due to the deformation of the branch optical path 102 of the first core, total reflection of the light traveling through the branch optical path 102 of the first core 100 is damaged, and the light quantity change is detected by the optical sensor 110 of the corresponding optical path. do.
  • the optical sensors 110 and 210 aligned to the respective branch optical paths 102 and 202 of the first and second cores sense a change in the amount of light of the branch optical paths of the first and second cores passing through the deformation position. It is possible to detect the two-dimensional position where the finger or the like is in contact.
  • first core 101 main path of the first core
  • first cladding 140 first waveguide layer
  • adhesive layer 160 second waveguide layer
  • L1, L2 light source

Abstract

Un dispositif de détection tactile selon un mode de réalisation de la présente invention comprend une carte, une première couche guide d'onde et une deuxième couche guide d'onde. La carte a une forme tétragonale. La première couche guide d'onde comporte un premier coeur, une première gaine et une pluralité de diviseurs. Le premier cœur est disposé sur la carte, et contient un chemin lumineux principal et une pluralité de chemins lumineux de branchement. Le chemin lumineux principal est adjacent à une partie latérale de la carte et s'étend parallèlement à sa partie latérale, et les chemins lumineux de branchement sont branchés dans une direction perpendiculaire à la direction du chemin lumineux principal. La première gaine possède un indice de réfraction inférieur à celui du premier cœur et est située sur la carte pour couvrir les deux parties latérales d'un chemin lumineux du premier cœur. Les diviseurs sont placés sur le chemin lumineux principal aux points de branchement des chemins lumineux de branchement, et ont un indice de réfraction différent de celui du premier cœur. De plus, les diviseurs ont un angle d'orientation de lumière incidente afin de refléter une partie de la lumière incidente depuis le chemin lumineux principal vers les chemins lumineux de branchement. La deuxième couche guide d'onde renferme un deuxième cœur, une deuxième gaine et une pluralité de diviseurs. Le deuxième cœur est placé sur la première couche guide d'onde et comprend un chemin lumineux principal et une pluralité de chemins lumineux de branchement. Le chemin lumineux principal du deuxième cœur est adjacent à une autre partie latérale de la carte, qui est perpendiculaire à la première partie latérale de la carte, et s'étend parallèlement à sa deuxième partie latérale, et les chemins lumineux de branchement du deuxième cœur sont branchés dans une direction perpendiculaire à la direction du chemin lumineux principal du deuxième cœur. La deuxième gaine possède un indice de réfraction inférieur à celui du deuxième cœur, et est disposée sur la carte pour couvrir les deux parties latérales d'un chemin lumineux du deuxième cœur. Les diviseurs du deuxième cœur sont agencés sur le chemin lumineux principal du deuxième cœur aux points de branchement des chemins lumineux de branchement du deuxième cœur, et possèdent un indice de réfraction différent de celui du deuxième cœur. En outre, les diviseurs du deuxième cœur ont un angle d'orientation de lumière incidente afin de refléter une partie de la lumière incidente depuis le chemin lumineux principal du deuxième cœur vers les chemins lumineux de branchement du deuxième cœur. La présente invention a pour objet de fournir un écran tactile comprenant un guide d'onde optique qui comporte une première couche guide d'onde et une deuxième couche guide d'onde pour empêcher une perte optique à un point de croisement de chemins lumineux. En conséquence, la dégradation de l'efficacité de détection et les erreurs de détection dues à une perte optique peuvent être empêchées afin de détecter de façon précise un point de pression dans une région tactile.
PCT/KR2011/000442 2010-11-22 2011-01-21 Dispositif de détection tactile ayant une structure à deux couches WO2012070719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2010-0116437 2010-11-22
KR1020100116437A KR101048812B1 (ko) 2010-11-22 2010-11-22 2 층 구조의 터치 센싱 장치

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WO2012070719A1 true WO2012070719A1 (fr) 2012-05-31

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WO (1) WO2012070719A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101282353B1 (ko) 2012-03-23 2013-07-04 부산대학교 산학협력단 광도파로 결합효과를 이용한 광 터치 패널 및 이의 제조방법

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005107804A (ja) * 2003-09-30 2005-04-21 Japan Aviation Electronics Industry Ltd 光導波路型タッチパネル
JP2005173881A (ja) * 2003-12-10 2005-06-30 Sanyo Electric Co Ltd Ｅｌ表示装置
US20060001653A1 (en) * 2004-06-30 2006-01-05 National Semiconductor Corporation Apparatus and method for a folded optical element waveguide for use with light based touch screens
US20060066537A1 (en) * 1998-10-02 2006-03-30 Semiconductor Energy Laboratory Co., Ltd. Touch panel, display device provided with touch panel and electronic equipment provided with display device
KR100835704B1 (ko) * 2006-06-14 2008-06-05 주식회사 이투아이기술 터치 스크린 장치
US20080273019A1 (en) * 2007-05-02 2008-11-06 National Semiconductor Corporation Shadow detection in optical touch sensor through the linear combination of optical beams and grey-scale determination of detected shadow edges
KR20090081481A (ko) * 2008-01-24 2009-07-29 엘지이노텍 주식회사 표시장치
KR100972932B1 (ko) * 2008-10-16 2010-07-28 인하대학교 산학협력단 터치 스크린 패널

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060066537A1 (en) * 1998-10-02 2006-03-30 Semiconductor Energy Laboratory Co., Ltd. Touch panel, display device provided with touch panel and electronic equipment provided with display device
JP2005107804A (ja) * 2003-09-30 2005-04-21 Japan Aviation Electronics Industry Ltd 光導波路型タッチパネル
JP2005173881A (ja) * 2003-12-10 2005-06-30 Sanyo Electric Co Ltd Ｅｌ表示装置
US20060001653A1 (en) * 2004-06-30 2006-01-05 National Semiconductor Corporation Apparatus and method for a folded optical element waveguide for use with light based touch screens
KR100835704B1 (ko) * 2006-06-14 2008-06-05 주식회사 이투아이기술 터치 스크린 장치
US20080273019A1 (en) * 2007-05-02 2008-11-06 National Semiconductor Corporation Shadow detection in optical touch sensor through the linear combination of optical beams and grey-scale determination of detected shadow edges
KR20090081481A (ko) * 2008-01-24 2009-07-29 엘지이노텍 주식회사 표시장치
KR100972932B1 (ko) * 2008-10-16 2010-07-28 인하대학교 산학협력단 터치 스크린 패널

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