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WO2015151861A1 - Capteur de position - Google Patents

Capteur de position Download PDF

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Publication number
WO2015151861A1
WO2015151861A1 PCT/JP2015/058471 JP2015058471W WO2015151861A1 WO 2015151861 A1 WO2015151861 A1 WO 2015151861A1 JP 2015058471 W JP2015058471 W JP 2015058471W WO 2015151861 A1 WO2015151861 A1 WO 2015151861A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical waveguide
core
position sensor
layer
elastic layer
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.)
Ceased
Application number
PCT/JP2015/058471
Other languages
English (en)
Japanese (ja)
Inventor
良真 吉岡
裕介 清水
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.)
Nitto Denko Corp
Original Assignee
Nitto Denko Corp
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 Nitto Denko Corp filed Critical Nitto Denko Corp
Publication of WO2015151861A1 publication Critical patent/WO2015151861A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/1221—Basic optical elements, e.g. light-guiding paths made from organic materials
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/125—Bends, branchings or intersections
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/3502—Optical coupling means having switching means involving direct waveguide displacement, e.g. cantilever type waveguide displacement involving waveguide bending, or displacing an interposed waveguide between stationary waveguides
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/3564—Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details
    • G02B6/3568—Mechanical details of the actuation mechanism associated with the moving element or mounting mechanism details characterised by the actuating force
    • G02B6/3574—Mechanical force, e.g. pressure variations
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means
    • G02B6/3596—With planar waveguide arrangement, i.e. in a substrate, regardless if actuating mechanism is outside the substrate
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 a position sensor that optically detects a pressed position.
  • a position sensor that optically detects a pressed position has been proposed (see, for example, Patent Document 1).
  • a plurality of linear cores serving as optical paths are arranged in the vertical and horizontal directions, and a sheet-like optical waveguide is formed by covering the peripheral edge portions of the cores with a clad.
  • the light that has propagated through each core is detected by the light receiving element at the other end surface of each core.
  • the pressed part is recessed in the pressing direction and the core is crushed (the cross-sectional area of the core in the pressing direction is reduced).
  • the detection level of light at the light receiving element is lowered at the core of the pressing portion, the vertical and horizontal positions (coordinates) of the pressing portion can be detected.
  • the thickness of the optical waveguide of the position sensor is generally very thin, about 1 mm or less, when the optical waveguide is in direct contact with a hard object such as a desk, It is difficult to dent.
  • the optical waveguide is required to be recessed with a small pressing force.
  • the optical waveguide is required to quickly recover to the original flat shape in order to prepare for the next pressing.
  • the present invention has been made in view of such circumstances, and the optical waveguide is recessed with a small pressing force, and when the pressing is released, the optical waveguide quickly recovers to its original shape.
  • the purpose is to provide
  • the position sensor of the present invention is connected to a sheet-like optical waveguide in which a plurality of linear cores formed in a lattice shape are covered with a cladding layer, and one end face of the core of the optical waveguide.
  • a position sensor including an elastic layer having an elastic modulus of 70% or more, wherein a surface portion of the optical waveguide corresponding to the lattice-shaped core portion is set as an input region, and a pressing portion in the input region is determined by the pressing.
  • the configuration is such that it is specified by the attenuation of the received light intensity at the light receiving element.
  • the inventors of the present invention make sure that the optical waveguide is quickly restored to its original shape when the optical waveguide is recessed with a small pressing force and the pressing is released. Therefore, the idea was to provide an elastic layer on the back surface of the optical waveguide. That is, by utilizing the elasticity of the elastic layer, it is easy to dent as described above, and the shape recovery is accelerated. And in order to optimize the characteristic, research was repeated about the hardness and rebound resilience of the elastic layer.
  • the durometer hardness of the elastic layer is set to a low value in the range of 20 to 40 and the rebound resilience of the elastic layer is set to a high value of 70% or more, the optical waveguide on the elastic layer is reduced in size. It was found that the optical waveguide quickly recovered to its original shape when the pressure was depressed and the pressure was released, and the present invention was reached.
  • an elastic layer is provided on the back surface portion of the optical waveguide corresponding to the lattice-shaped core portion, and the durometer hardness of the elastic layer is set to be as low as 20 to 40. . Therefore, when the surface portion of the optical waveguide corresponding to the lattice-shaped core portion, which is the input region, is pressed, the optical waveguide is easily recessed in the pressing direction even if the pressing force is small. That is, the position sensor of the present invention is excellent in pressing detection sensitivity. Furthermore, the elastic layer has a high impact resilience of 70% or higher. Therefore, when the pressing is released, the optical waveguide quickly recovers to the original flat shape, and can be quickly prepared for the next pressing. That is, the position sensor of the present invention is excellent in continuous detection of the pressed position.
  • the position sensor of the present invention is excellent in press detection sensitivity and continuous detection while being thinned.
  • the 1st Embodiment of the position sensor of this invention is shown typically, (a) is the top view, (b) is the expanded sectional view. It is sectional drawing which shows the use condition of the said position sensor typically. (A)-(d) is explanatory drawing which shows typically the manufacturing method of the said position sensor. It is an expanded sectional view showing typically a 2nd embodiment of a position sensor of the present invention. It is an expanded sectional view showing a 3rd embodiment of a position sensor of the present invention typically. (A) to (f) are enlarged plan views schematically showing a crossing form of lattice-like cores in the position sensor. (A) is an enlarged plan view schematically showing a light path in a continuous intersection, and (b) is an enlarged plan view schematically showing a light path in a discontinuous intersection.
  • the position sensor of the present invention includes a sheet-like optical waveguide in which a plurality of linear cores formed in a lattice shape are covered with a cladding layer, a light-emitting element connected to one end face of the core of the optical waveguide, and the core
  • a light receiving element connected to the other end surface of the optical waveguide, and the light emitted by the light emitting element is received by the light receiving element through the core of the optical waveguide, and the optical waveguide corresponding to the lattice-shaped core portion
  • a position sensor that uses a front surface portion as an input region, and a pressing position in the input region is specified by attenuation of light reception intensity at the light receiving element due to the pressing, and the back surface portion of the optical waveguide corresponding to the lattice-shaped core portion
  • an elastic layer having a durometer hardness of 20 to 40 and a rebound resilience of 70% or more is provided.
  • FIG. 1 (a) is a plan view showing a first embodiment of the position sensor of the present invention
  • FIG. 1 (b) is an enlarged cross-sectional view of the central portion thereof.
  • the position sensor of this embodiment includes a rectangular sheet-shaped optical waveguide W in which a lattice-shaped core 2 is sandwiched between a rectangular sheet-shaped underclad layer 1 and an overclad layer 3, and an underclad layer of the optical waveguide W. 1 is connected to the elastic layer R provided on the back surface, the light emitting element 4 connected to one end face of the linear core 2 constituting the lattice-like core 2, and the other end face of the linear core 2.
  • the light receiving element 5 is provided.
  • the elastic layer R has a durometer hardness as low as 20 to 40 and a rebound resilience as high as 70% or more.
  • the light emitted from the light emitting element 4 passes through the core 2 and is received by the light receiving element 5.
  • the surface part of the over clad layer 3 corresponding to the part of the lattice-like core 2 is an input region.
  • the core 2 is indicated by a chain line, and the thickness of the chain line indicates the thickness of the core 2.
  • the number of cores 2 is omitted.
  • the arrow of Fig.1 (a) has shown the direction where light travels.
  • a durometer is provided on the back surface portion of the optical waveguide W corresponding to the lattice-shaped core 2 portion (in this embodiment, the back surface portion of the under cladding layer 1).
  • the elastic layer R having a low hardness in the range of 20 to 40 and a high rebound resilience of 70% or more is provided.
  • the detection of the pressing position by the position sensor is performed in a state where the position sensor is placed so that the elastic layer R is in contact with the surface of a hard object such as the desk 30 as shown in a sectional view in FIG.
  • the pressing position is detected.
  • the position sensor since the optical waveguide W is easily recessed even when the pressing force is small, the position sensor is excellent in pressing detection sensitivity by utilizing the low durometer hardness of the elastic layer R. It has become a thing.
  • the optical waveguide W quickly recovers to the original flat shape by utilizing the high rebound resilience of the elastic layer R as described above. Can be quickly prepared for the next pressing, and is excellent in continuous detection of the pressing position.
  • the pressing position may be detected on the surface of the input area via a resin film, paper, or the like.
  • the material for forming the elastic layer R having the above characteristics examples include silicone rubber and epoxy rubber.
  • the thickness of the elastic layer R is set within a range of 0.02 to 2.00 mm from the viewpoint of making the dent and shape recoverability of the optical waveguide W better while reducing the thickness of the elastic layer R itself. It is preferred that The reason is that if the elastic layer R is too thin, the effects of the dent and shape recovery of the optical waveguide W tend to be small. Even if the elastic layer R is too thick, the dent and shape of the optical waveguide W are recoverable. This is because the effect of is not sufficiently improved and tends to be excessive quality.
  • the optical waveguide W has a predetermined pattern in a state where the core 2 protrudes from the surface of the sheet-like underclad layer 1 having a uniform thickness, as shown in a sectional view in FIG.
  • the over clad layer 3 is formed on the surface of the under clad layer 1 with the core 2 covered.
  • the thickness of each layer is set, for example, in the range of 10 to 500 ⁇ m for the under cladding layer 1, in the range of 5 to 100 ⁇ m for the core 2, and in the range of 1 to 200 ⁇ m for the over cladding layer 3.
  • Examples of the material for forming the under cladding layer 1, the core 2 and the over cladding layer 3 constituting the optical waveguide W include photosensitive resins and thermosetting resins.
  • the refractive index of the core 2 is set larger than the refractive indexes of the under cladding layer 1 and the over cladding layer 3.
  • the refractive index can be adjusted by, for example, selecting the type of each forming material and adjusting the composition ratio.
  • the elastic modulus of the core 2 is preferably set to be equal to or higher than the elastic modulus of the under cladding layer 1 and the over cladding layer 3. The reason is that if the elastic modulus is set in the opposite direction, the periphery of the core 2 becomes hard, so that the optical waveguide W having a considerably larger area than the area of the pen tip or the like that presses the input region portion of the over clad layer 3. This is because the above-mentioned portion is recessed and it is difficult to accurately detect the pressed position.
  • each elastic modulus for example, the elastic modulus of the core 2 is set within a range of 1 to 10 GPa, and the elastic modulus of the over cladding layer 3 is set within a range of 0.1 to 10 GPa.
  • the elastic modulus of the layer 1 is preferably set within a range of 0.1 to 1 GPa.
  • the elastic modulus of the core 2 is large, the core 2 is not crushed by a small pressing force (the cross-sectional area of the core 2 is not reduced), but the optical waveguide W is recessed by the pressing (see FIG. 2). Since leakage (scattering) of light occurs from the bent portion of the core 2 corresponding to the bent portion, the detection level of light in the light receiving element 5 [see FIG. The pressing position can be detected.
  • the elastic layer R is formed into a sheet having a uniform thickness.
  • the undercladding layer 1 is formed on the surface of the elastic layer R in the form of a sheet having a uniform thickness.
  • the core 2 is formed in a predetermined pattern on the surface of the under cladding layer 1 in a protruding state.
  • an over clad layer 3 is formed on the surface of the under clad layer 1 so as to cover the core 2.
  • the light emitting element 4 is connected to one end face of the core 2, and the light receiving element 5 is connected to the other end face of the core 2 [see FIG. 1 (a)]. In this way, the position sensor is obtained.
  • these elastic layers R etc. are produced by the manufacturing method according to each formation material.
  • FIG. 4 is an enlarged view of the cross section of the central portion of the second embodiment of the position sensor of the present invention.
  • the structure of the optical waveguide W is upside down with respect to the first embodiment shown in FIG. That is, a lattice-like core 2 is embedded in the surface portion of the sheet-like underclad layer 1 so that the surface of the underclad layer 1 and the top surface of the core 2 are formed flush with each other.
  • the sheet-like over clad layer 3 is formed in a state where the surface of the core 2 and the top surface of the core 2 are covered.
  • the other parts are the same as those of the first embodiment shown in FIG. 1B, and the same reference numerals are given to the same parts.
  • the position sensor of this embodiment also has the same operations and effects as those of the first embodiment shown in FIG. Furthermore, since the over clad layer 3 has a uniform thickness, the position sensor of this embodiment can easily detect the pressing position in the input region.
  • FIG. 5 is an enlarged view of the cross section of the central portion of the third embodiment of the position sensor of the present invention.
  • the under cladding layer 1 is not formed in the first embodiment shown in FIG. 1B, and the core 2 and the over cladding layer are directly formed on the surface of the elastic layer R. 3 is formed.
  • the other parts are the same as those of the first embodiment shown in FIG. 1B, and the same reference numerals are given to the same parts.
  • the position sensor of this embodiment also has the same operations and effects as those of the first embodiment shown in FIG. Furthermore, since the position sensor of this embodiment is not formed with the under-cladding layer 1, the position sensor is easily affected by the elastic layer R, and is excellent in the dent and shape recoverability of the optical waveguide W. Excellent detection sensitivity and continuous detection.
  • each of the intersecting portions of the lattice-like core 2 is normally formed in a state in which all of the four intersecting directions are continuous as shown in an enlarged plan view in FIG.
  • the gap G is formed of a material for forming the under cladding layer 1 or the over cladding layer 3.
  • the width d of the gap G exceeds 0 (it is sufficient if the gap G is formed) and is usually set to 20 ⁇ m or less.
  • two intersecting directions are discontinuous.
  • the three intersecting directions may be discontinuous, or as shown in FIG. 6 (f), all the four intersecting directions may be discontinuous. It may be discontinuous.
  • the light crossing loss can be reduced. That is, as shown in FIG. 7 (a), in an intersection where all four intersecting directions are continuous, if one of the intersecting directions (upward in FIG. 7 (a)) is noted, the light incident on the intersection Part of the light reaches the wall surface 2a of the core 2 orthogonal to the core 2 through which the light has traveled, and is transmitted through the core 2 because the reflection angle at the wall surface is large [two points in FIG. (See chain line arrow). Such transmission of light also occurs in the direction opposite to the above (downward in FIG. 7A).
  • FIG. 7B when one intersecting direction (the upward direction in FIG.
  • Component a 60 parts by weight of an epoxy resin (Mitsubishi Chemical Corporation YL7410).
  • Component b 40 parts by weight of epoxy resin (manufactured by Daicel, EHPE3150).
  • Component c 4 parts by weight of a photoacid generator (manufactured by Sun Apro, CPI101A).
  • Component d 90 parts by weight of an epoxy resin (manufactured by Daicel Corporation, EHPE3150).
  • Component e 10 parts by weight of an epoxy resin (manufactured by Mitsubishi Chemical Corporation, Epicoat 1002).
  • Component f 1 part by weight of a photoacid generator (manufactured by ADEKA, SP170).
  • Component g 50 parts by weight of ethyl lactate (manufactured by Wako Pure Chemical Industries, Ltd., solvent).
  • a core forming material was prepared by mixing these components d to g.
  • the under clad layer was formed on the surface of each elastic layer by spin coating using the under clad layer forming material.
  • the under cladding layer had a thickness of 50 ⁇ m, an elastic modulus of 240 MPa, and a refractive index of 1.496.
  • the elastic modulus was measured using a viscoelasticity measuring device (TA Instruments Japan Inc., RSA3).
  • the core had a width of 30 ⁇ m, a thickness of 50 ⁇ m, an elastic modulus of 1.58 GPa, and a refractive index of 1.516.
  • an over clad layer was formed on the surface of the under clad layer by spin coating using the over clad layer forming material so as to cover the core.
  • the overcladding layer had a thickness (thickness from the core surface) of 25 ⁇ m, an elastic modulus of 240 MPa, and a refractive index of 1.496.
  • a light emitting element (XH85-S0603-2s-2 manufactured by Optowell) is connected to one end face of the core, and a light receiving element (s10226 manufactured by Hamamatsu Photonics Co., Ltd.) is connected to the other end face of the core. 4 and Comparative Examples 1 to 3 were prepared.
  • CMOS scan speed CMOS scan speed
  • results were evaluated as inferior to continuous detection (shape recoverability) of the position sensor, and x was shown in Table 1 below.
  • the light reception spectrum did not recover even after time, and the depression due to pressing did not recover to the original shape. This is because the durometer hardness and the rebound resilience of the elastic layer are too low.
  • the optical waveguide is shown in a cross-sectional view in FIG. 1B.
  • the first to fourth embodiments are also applicable to the optical waveguide shown in the cross-sectional views in FIGS.
  • the evaluation result which shows the same tendency as 4 was obtained. Especially, what was shown in FIG. 5 showed higher evaluation.
  • the position sensor of the present invention can be used to improve the detection sensitivity and the continuous detection when detecting the pressed position.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Human Computer Interaction (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

L'invention concerne un capteur de position, moyennant quoi un guide d'ondes optique cède sous une faible force de contact et retrouve rapidement sa forme initiale lorsque le contact est relâché. Ce capteur de position comprend les éléments suivants : un guide d'ondes optique (W) en forme de feuille quadrangulaire, dans lequel un réseau de noyaux (2) est enserré entre une couche (1) de revêtement inférieur en forme de feuille quadrangulaire et une couche (3) de revêtement supérieur ; une couche élastique (R) prévue sur la surface de fond de la couche (1) de revêtement inférieure du guide d'ondes optique (W) ; un élément électroluminescent (4) connecté à une face d'extrémité de chaque noyau linéaire (2) constituant le réseau de noyaux (2) ; et un élément (5) de réception de lumière connecté à l'autre face d'extrémité de chaque noyau linéaire (2). La couche élastique (R) est définie de manière à avoir une dureté Duromètre faible entre 20 et 40 inclus et une élasticité de rebondissement élevée d'au moins 70 %.
PCT/JP2015/058471 2014-04-03 2015-03-20 Capteur de position Ceased WO2015151861A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014076892A JP2015197877A (ja) 2014-04-03 2014-04-03 位置センサ
JP2014-076892 2014-04-03

Publications (1)

Publication Number Publication Date
WO2015151861A1 true WO2015151861A1 (fr) 2015-10-08

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PCT/JP2015/058471 Ceased WO2015151861A1 (fr) 2014-04-03 2015-03-20 Capteur de position

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JP (1) JP2015197877A (fr)
TW (1) TW201543307A (fr)
WO (1) WO2015151861A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11822265B2 (en) 2020-12-07 2023-11-21 Canon Kabushiki Kaisha Toner container and image forming system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109114A (ja) * 1983-11-16 1985-06-14 積水化学工業株式会社 光弾性タッチパネル
JP2005107804A (ja) * 2003-09-30 2005-04-21 Japan Aviation Electronics Industry Ltd 光導波路型タッチパネル
JP2014021576A (ja) * 2012-07-13 2014-02-03 Shin Etsu Polymer Co Ltd 導光ユニット、導光ユニットを備える光学式タッチパネル、および光学式タッチパネルを備える電子機器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109114A (ja) * 1983-11-16 1985-06-14 積水化学工業株式会社 光弾性タッチパネル
JP2005107804A (ja) * 2003-09-30 2005-04-21 Japan Aviation Electronics Industry Ltd 光導波路型タッチパネル
JP2014021576A (ja) * 2012-07-13 2014-02-03 Shin Etsu Polymer Co Ltd 導光ユニット、導光ユニットを備える光学式タッチパネル、および光学式タッチパネルを備える電子機器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11822265B2 (en) 2020-12-07 2023-11-21 Canon Kabushiki Kaisha Toner container and image forming system
US12140884B2 (en) 2020-12-07 2024-11-12 Canon Kabushiki Kaisha Toner container and image forming system

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TW201543307A (zh) 2015-11-16
JP2015197877A (ja) 2015-11-09

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