WO2021241102A1 - Indicateur de position - Google Patents

Indicateur de position Download PDF

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Publication number
WO2021241102A1
WO2021241102A1 PCT/JP2021/016612 JP2021016612W WO2021241102A1 WO 2021241102 A1 WO2021241102 A1 WO 2021241102A1 JP 2021016612 W JP2021016612 W JP 2021016612W WO 2021241102 A1 WO2021241102 A1 WO 2021241102A1
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WO
WIPO (PCT)
Prior art keywords
light
core body
displacement
face
core
Prior art date
Application number
PCT/JP2021/016612
Other languages
English (en)
Japanese (ja)
Inventor
▲寛▼和 邱
鈞▲悦▼ 蕭
Original Assignee
株式会社ワコム
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 株式会社ワコム filed Critical 株式会社ワコム
Priority to JP2022527602A priority Critical patent/JPWO2021241102A1/ja
Publication of WO2021241102A1 publication Critical patent/WO2021241102A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • 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

Definitions

  • the present invention relates to a position indicator which is used together with a position detection device provided with a position detection sensor and has a pressure detection function.
  • the coordinate input device consisting of a position detection device provided with a position detection sensor and a position indicator that inputs an instruction using a surface area where the position can be detected by the position detection sensor as a position instruction input surface includes a position detection sensor and a position indicator.
  • a position detection sensor and a position indicator.
  • electrostatic coupling method depending on the difference in the coupling method between the two.
  • Pen-type position indicators used in this type of coordinate input device generally have the function of detecting the pressure (pen pressure) applied to the tip of the core (pen tip) and transmitting it to the position detector. It is configured to be prepared. In this case, in the position indicator, in order to detect the pressure applied to the core, the tip of the core is projected from the opening of the housing of the position indicator, and the core is placed on the housing. , It is made possible to move in the direction of its axis. Then, a pressure detection unit is provided on the side opposite to the tip portion of the core body, and in this pressure detection unit, the displacement in the axial direction of the core body according to the pressure applied to the tip portion is set to the capacitance. It is configured to detect as an electrical change such as a change, a change in inductance value, or a change in resistance.
  • the pressure detection unit that detects a change in capacitance has a configuration in which the capacitance changes by changing the contact area between the dielectric and the conductive elastic member according to the applied pressure (for example, Patent Document 1 (Special Patent Document 1). (See Kai 2016-126503)) and a semiconductor device in which the distance between two electrodes facing each other via an air layer which is a dielectric changes depending on the applied pressure (for example, Patent Document 2). (See JP-A-2013-161307)) and the like are known.
  • Patent Document 3 Japanese Patent Application Laid-Open No. 2017-216002. reference.
  • a pressure detection unit that detects displacement of the core body in the axial direction according to the applied pressure as a change in resistance value is known to use a strain gauge (for example, Patent Document 4 (Japanese Patent Laid-Open No. 4). 2019-016038 (Ab. 2019)).
  • the tip of the core is brought into contact with the input surface of the position detection sensor, and the tip of the core of the position indicator is pressed against the input surface, so that pressure is applied to the tip of the core.
  • the pressure detecting unit detects the pressure applied to the tip portion of the core body.
  • the position detection device receives information according to the pressure detected by the pressure detection unit of the position indicator, and the pen pressure value applied to the tip of the core of the position indicator. It is output as the information of.
  • Japanese Unexamined Patent Publication No. 2016-126503 Japanese Unexamined Patent Publication No. 2013-161307 Japanese Unexamined Patent Publication No. 2017-216002 Japanese Unexamined Patent Publication No. 2019-0106038
  • the reaction force generated by the displacement of the core in the axial direction by pressing the tip of the core of the position indicator against the input surface ( The structure is such that pressure) is directly detected by converting it into a change in capacitance, a change in inductance value, and a change in resistance.
  • the pressure detection unit in order for the pressure detection unit to detect the pressure applied to the tip of the core body of the position indicator, it is necessary to move (stroke) the core body in the axial direction of a certain size or more. , It was difficult to determine the pressure detection start point (the position where the pressure applied to the tip after the tip of the core contacts the input surface and the pressure can be detected and output).
  • the load when the applied pressure can be detected is not 0 grams, but an offset load of a predetermined size is set, and when the load is less than this offset load, the position indicator is used.
  • the output pressure value of the pressure detection unit is output as zero and transmitted to the position detection device, but setting this offset load is very troublesome.
  • An object of the present invention is to provide a position indicator and a coordinate input device capable of solving the above problems.
  • the displacement detection unit includes a light emitting unit and a light receiving unit, and the light emitted from the light emitting unit is emitted to the end face, and the light emitted is reflected by the end face and returned to the light receiving unit.
  • the displacement of the end face is detected based on the phase difference between the emitted light and the received light.
  • a position indicator characterized in that the pressure applied to the core body is detected based on the displacement detected by the displacement detecting unit.
  • the emitted light emitted from the light emitting unit is emitted to the end face that is displaced according to the displacement of the core body applied to the tip portion, and the emitted light is emitted to the end surface.
  • the received light reflected by and returned is received by the light receiving unit.
  • the displacement detection unit detects the displacement of the end face based on the phase difference between the emitted light and the received light.
  • the position indicator detects the pressure applied to the tip of the core based on the displacement detected by the displacement detection unit.
  • the position indicator of the first embodiment is an example in the case of an active capacitance type electronic pen having a pen-shaped housing.
  • FIG. 1A is an enlarged cross-sectional view for explaining the configuration of the electronic pen 1 as the position indicator of the first embodiment on the pen tip side.
  • the front cap 3 is attached to the end on the pen tip side of the cylindrical housing 2 made of a conductive member, for example, SUS (Steel Use Stainless).
  • the front cap 3 is made of an insulating member, for example, a resin, and is configured to have a hollow portion inside.
  • the front cap 3 has a tubular portion 3a having a diameter slightly smaller than the diameter of the inner wall surface of the housing 2 and an end side of the tubular portion 3a which is one pen tip side in the axial direction.
  • the tapered portion 3b formed so that the diameter becomes smaller as it gets closer to the pen tip is integrally formed.
  • the front cap 3 is attached to the pen tip side of the housing 2 by inserting and fitting the tubular portion 3a into the housing 2 and adhering the front cap 3 as needed.
  • An opening 3c is provided at the tapered tip of the tapered portion 3b of the front cap 3, and an elastic member 4 made of, for example, elastic rubber is attached to the opening 3c.
  • the elastic member 4 has an opening 4a having the same diameter as the opening 3c of the tapered portion 3b of the front cap 3.
  • the core 5 is a portion of the conductor core portion 51 excluding a conductive member, for example, a conductor core portion 51 made of a conductive metal, and a rear end portion 51a of the conductor core portion 51 opposite to the tip side. It is composed of a cover portion 52 that covers the entire surface.
  • the cover portion 52 is made of a hard resin, for example, POM (Polyoxymethylene).
  • the core body 5 of this example is formed from the core body main body portion 5a inserted into the hollow portion of the housing 2 through the opening 4a of the elastic member 4 and the opening 3c of the front cap 3, and the opening 4a of the elastic member 4. It is provided with a tip portion 5b protruding to the outside.
  • the core body portion 5a is covered with the resin of the cover portion 52 except for the rear end portion 51a of the conductor core portion 51.
  • the outer diameter of the resin-covered portion of the cover portion 52 of the core body main body portion 5a is smaller than the diameter of the opening 4a of the elastic member 4 and the opening 3c of the front cap 3.
  • the tip portion 5b is configured to be covered with the resin of the cover portion 52 so that the tip side of the conductor core portion 51 is not exposed to the outside.
  • the diameter of the connecting portion of the tip portion 5b with the core body main body portion 5a is larger than the diameter of the opening 4a of the elastic member 4 and the opening 3c of the front cap 3, and the diameter becomes larger toward the pen tip. It has a small conical shape.
  • a step portion having a ring-shaped end surface 5c is formed at the connecting portion of the tip portion 5b with the core body main body portion 5a.
  • the diameter of the connecting portion of the tip portion 5b with the core body main body portion 5a is the same as the diameter on the tip side of the elastic member 4.
  • the outer peripheral side surface of the tip portion 5b of the core body 5 and the outer peripheral side surface of the elastic member 4 are flush with each other so that a step does not occur.
  • the core body body 5 Since the core body 5 has the above-described configuration, the core body body 5 can be inserted into the hollow portion of the housing 2 through the opening 4a of the elastic member 4 and the opening 3c of the front cap 3.
  • the ring-shaped end surface 5c of the tip portion 5b connected to the core body 5a becomes the ring-shaped end surface 4b of the elastic member 4. It will be in a state of matching with.
  • a displacement detection unit 6 that optically detects the displacement of the core body 5 in the axial center direction and a displacement according to the displacement of the core body 5 in the axial center direction are displaced.
  • a core fitting member 7 having an end surface 7S is provided.
  • the displacement detection unit 6 includes a light emitting unit, for example, a light emitting diode 61 that emits laser light, a light receiving unit, a 3D (3 Dimension) sensor 62 in this example, and a TOF controller 63, as shown in FIG.
  • a TOF (Time Of Flight) sensor is provided, and a pen pressure detection circuit 67 composed of, for example, a microprocessor is provided.
  • the TOF controller 63 controls the light emitting driver 64 to emit the light emission Tp (see the waveform diagram of FIG. 3A) of the pulse-modulated laser light from the light emitting diode 61 constituting the example of the light emitting unit. Control.
  • the emitted light Tp of the laser light emitted from the light emitting diode 61 is projected onto the end face 7S in this example through the lens 65 and reflected by the end face 7S.
  • the laser light reflected by the end surface 7S is received as light receiving light Rp by a 3D sensor constituting an example of the light receiving unit through the lens 66, and the light receiving result is supplied to the TOF controller 63.
  • the received light Rp is received by the 3D sensor 62 at a time delayed by a time corresponding to the distance between the displacement detection unit 6 and the end face 7S from the time when the light emitted from the light emitting diode 61 is emitted. Therefore, as shown in FIG. 3 (B), the received light Rp is set at a distance between the displacement detection unit 6 and the end face 7S with respect to the emitted light Tp of the laser light of the emitted light shown in FIG. 3 (A). It has a phase difference PHd of only the corresponding delay time.
  • the TOF controller 63 detects the phase difference PHd between the emitted light Tp and the received light Rp, and supplies the detected phase difference PHd information to the pen pressure detection circuit 67, which will be described later.
  • the pen pressure detection circuit 67 detects the pen pressure applied to the tip portion 5b of the core body 5 based on the information of the phase difference PHd from the TOF controller 63.
  • the pen pressure detection circuit 67 supplies the detected pen pressure information to the signal processing circuit 9 arranged on the printed circuit board 10 as described later. The processing of pen pressure detection in this pen pressure detection circuit 67 will be described in detail later.
  • the electronic pen 1 of this embodiment includes a battery that supplies a power supply voltage for driving the displacement detection unit 6 and the signal processing circuit 9.
  • the displacement detection unit 6 has a holder unit 8 in a direction in which the light emitting unit and the light receiving unit of the laser beam are orthogonal to the axial center direction of the electronic pen 1 in the vicinity of the axial center position of the electronic pen 1. It is held in such a state and is arranged in the hollow portion of the front cap 3.
  • FIG. 1B cuts formed in a hook shape from the opening end are formed at a plurality of positions in the circumferential direction on the opening end side opposite to the tip side of the front cap 3.
  • a notch groove 3d is provided.
  • the holder portion 8 is formed with a plurality of protrusions 8a that fit into each of the plurality of notch grooves 3d. Then, the holder portion 8 is rotated in the circumferential direction after being pushed into the front cap 3 in the axial direction in a state where the protrusion 8a is fitted in the notch groove 3d, whereby FIG. As shown in B), the protrusion 8a is made to engage with the hook-shaped notch groove 3d. As a result, the holder portion 8 is coupled to the front cap 3 so as not to move in the axial direction.
  • the holder portion 8 and the front cap 3 may be bonded and adhered as shown in FIG. 1 (B).
  • a substrate mounting base portion 8b is formed on the side of the holder portion 8 opposite to the coupling side with the front cap 3, and the printed circuit board 10 is mounted on the substrate mounting base portion 8b.
  • the signal processing circuit 9 described above is arranged on the printed circuit board 10.
  • the signal processing circuit 9 is composed of an IC (Integrated Circuit).
  • the signal processing circuit 9 generates a signal to be supplied to the conductor core portion 51 of the core body 5.
  • the signal includes a position detection signal and pen pressure information detected by the pen pressure detection circuit 67 of the displacement detection unit 6 as additional information of the position detection signal.
  • the holder portion 8 holds the core body fitting member 7 in the hollow portion of the front cap 3, and also holds a shield component (conductor spring 12 described later) for shielding the conductor core portion 51 of the core body 5. It is configured to do. As described above, the core fitting member 7, the shield component, and the like are configured to be held by the holder portion 8 in advance before the holder portion 8 is connected to the front cap 3.
  • the holder portion 8 includes a tubular portion 8c that forms a cylindrical space portion on the hollow portion side of the front cap 3.
  • a cylindrical holding member 11 is inserted into the tubular portion 8c and coupled.
  • the holding member 11 holds the core fitting member 7 in a state where the end surface 7S can be moved in the axial direction.
  • the hollow portion 11a of the cylindrical holding member 11 constitutes a space for projecting the emitted light Tp from the displacement detecting portion 6 onto the end face 7S and receiving the reflected light from the end face 7S.
  • the core body fitting member 7 includes a core body fitting member main body 71, a conductive member 72 coupled to the core body 5 side of the core body fitting member main body 71, and a core body fitting member main body. It is composed of an end face forming portion 73 coupled to the displacement detecting portion 6 side of the portion 71.
  • the core body fitting member main body 71 is provided with a fitting recess 71a into which the rear end portion 51a of the conductor core portion 51 of the core body 5 is fitted on the core body 5 side in the axial center direction, and is provided in the axial center direction.
  • a fitting protrusion 71b fitted to the end face forming portion 73 and a flange portion 71c projecting in a direction orthogonal to the axial center direction are provided.
  • the conductive member 72 is made of an elastic member such as conductive rubber, and when it is coupled to the core body 5 side of the core body fitting member main body 71, the core body fitting member main body 71 is fitted.
  • a through hole 72a that communicates with the joint recess 71a is provided.
  • the diameter of the through hole 72a of the conductive member 72 is equal to the diameter of the rear end portion 51a of the conductor core portion 51 of the core body 5, and the rear end portion 51a of the conductor core portion 51 of the core body 5 is conductive.
  • the conductor core portion 51 of the core body 5 and the conductive member 72 are in strong contact with each other due to the elastic force of the conductive member 72, and the two are electrically well connected.
  • the conductive member 72 is coupled to one end 12a side of a coil spring 12 made of a conductive material such as a conductive metal.
  • the coil spring 12 is arranged so as to be wound around the outer peripheral portion of the holding member 11, and the other end 12b side penetrates the holder portion 8. It is led out to the printed circuit board 10 side, and is configured to be electrically connected to the signal processing circuit 9 on the printed circuit board 10.
  • the other end 12b of the coil spring 12 is configured to be electrically connected to the signal processing circuit 9 on the front side from the back side of the printed circuit board 10 via a through hole. ..
  • a signal including a position detection signal and pen pressure information generated by the signal processing circuit 9 is supplied to the conductor core portion 51 of the core body 5 through the coil spring 12, and the conductor core portion 51 is static with respect to the position detection sensor. It is transmitted by electric coupling.
  • the shield member holding portion 13 is sandwiched between the cylindrical portion 8c of the holder portion 8 and the tubular portion 3a of the front cap 3. It is provided in the hollow portion of the cap 3.
  • the shield member holding portion 13 is configured to extend from the tubular portion 3a to the tapered portion 3b side in the hollow portion of the front cap 3.
  • a shield member 14 formed by winding a coil made of a conductive metal is arranged on the outer periphery of the shield member holding portion 13, in this example.
  • the shield member 14 is for preventing noise from being taken into the conductor core portion 51 of the core body 5, and is connected to, for example, the ground conductor of the printed circuit board 10.
  • the end face forming portion 73 is provided with a fitting concave hole 73a, and the fitting protrusion 71b of the core body fitting member main body portion 71 is fitted into the fitting concave hole 73a, whereby the core body fitting member is fitted. It is coupled to the main body 71.
  • the end face forming portion 73 includes a surface facing the displacement detecting portion 6 and a surface facing each other via the space of the hollow portion 11a of the holding member 11, and the surface constitutes the end face 7S, and the end face 7S has good light. Mirror finish is applied to reflect the light.
  • the end face forming portion 73 is made of a material that can be mirror-finished, for example, a metal such as SUS (Steel Use Stainless).
  • the end face forming portion 73 is arranged so as to be movable in the axial direction in the hollow portion 11a of the holding member 11. Therefore, the core fitting member 7 can be moved by the end face forming portion 73 moving in the axial core direction with respect to the holding member 11.
  • a step portion 11b is formed on the core body 5 side of the hollow portion 11a of the holding member 11, and this step portion 11b is the core body 5 of the end face forming portion 73.
  • the elastic member 15 is arranged between the flange portion 71c of the core body fitting member main body 71 and the end portion of the holding member 11 on the core 5 side.
  • the elastic member 15 is made of a high-performance urethane foam member, for example, a micropolymer sheet Polon (registered trademark), which has high resilience to compression and high impact absorption performance.
  • the elastic member 15 includes the core body 5 and the core body fitting member 7 together with the elastic member 4 between the tip portion 5b of the core body 5 and the front cap 3 described above, and the tip portion of the core body 5. After moving in the axial direction due to the pressure (writing pressure) applied to 5b, it becomes an elastic member for returning to the original position when the pressure is no longer applied.
  • the core body 5 and the core body fitting member 7 resist the elastic forces of the elastic member 4 and the elastic member 15 in the axial direction.
  • a displacement of a magnitude corresponding to the applied pressure is performed, and the end face 7S is displaced in the axial direction in response to this displacement.
  • the processing of the pen pressure detection circuit 67 of the displacement detection unit 6 will be described.
  • the pen pressure detection circuit 67 receives information on the phase difference between the emitted light Tp and the received light Rp at the position of the end surface 7S when no pressure is applied to the tip portion 5b of the core body 5 from the TOF controller 63.
  • the information of the phase difference between the emitted light Tp and the received light Rp when the writing pressure is zero is stored.
  • the stored information of the phase difference information between the emitted light Tp and the received light Rp when the writing pressure is zero may be updated periodically, for example, a user using a side switch of the electronic pen 1 or the like. It may be configured so that it can be updated according to the instruction of.
  • the end face 7S exhibits a displacement in the axial direction according to the magnitude of the applied pressure.
  • the TOF controller 63 detects a phase difference between the emitted light Tp and the received light Rp, which is different from the phase difference between the emitted light Tp and the received light Rp when the writing pressure is zero, according to the displacement of the end face 7S.
  • Information on the phase difference between the detected emitted light Tp and the received light Rp is supplied to the pen pressure detection circuit 67.
  • the displacement ⁇ d of the end face 7S according to the applied pressure is detected from the difference ⁇ PHd between the phase difference between the emitted light Tp and the received light Rp at the position after the displacement.
  • the pressure detection circuit 67 detects the pressure in consideration of the elastic coefficients of the elastic member 4 and the elastic member 15.
  • the information of the pen pressure F calculated as described above is supplied from the pen pressure detection circuit 67 to the signal processing circuit 9.
  • the signal processing circuit 9 converts the information of the pen pressure F into, for example, a digital signal, supplies it to the conductor core portion 51 of the core body 5, and detects it by the position detection device through the position detection sensor.
  • the end face 7S is displaced in the axial direction together with the core body 5 according to the magnitude of the pressure (writing pressure) applied to the tip portion 5b of the core body 5. It is provided with a displacement detecting unit 6 that optically detects the displacement in the axial direction of the above, and is configured to detect the pen pressure by the pen pressure detecting circuit 67 based on the displacement detected by the displacement detecting unit 6. ..
  • the configuration for pen pressure detection can be simplified, and the core body and the core body fitting member are displaced in the axial direction according to the applied pressure. Is not directly transmitted to the pen pressure detecting unit as a pressure, so that there is no problem that a defect of the pressure detecting unit occurs due to the direct reception of the pressure.
  • the displacement according to the applied pressure as in the conventional case is detected as the change of the capacitance, the inductance, and the resistance value, and the pen pressure is detected based on the detection result.
  • the displacement according to the applied pressure is optically detected, and the writing pressure is detected from the detected displacement, so that it is possible to detect with good responsiveness. It is also easy to determine the pressure (writing pressure) detection start point.
  • the displacement detection unit 6 can be configured by using a popular TOF sensor, there is an advantage that the configuration can be made simpler.
  • FIG. 4 shows an enlarged cross-sectional view of the pen tip side of the electronic pen 1A of the second embodiment.
  • the core body 5 and the core body fitting member 7 have the same configuration as the electronic pen 1 of the first embodiment in the electronic pen 1A of the second embodiment.
  • the displacement detection unit 6A includes a TOF controller 63A having a function of detecting a phase difference for tilt detection as a phase difference between emitted light and received light, and a tilt detecting circuit 68 is added.
  • the other configurations are the same as those of the displacement detection unit 6 of the electronic pen 1 of the first embodiment.
  • the holder portion 8A holding the displacement detecting portion 6A is located at the end of the cylindrical housing 2A made of SUS, for example, on the pen tip side in the axial direction. It is attached so that it can be fixed in an immovable state.
  • the protrusion 2Aa of the housing 2A is fitted into the recess 8Ad of the holder 8A, so that the holder 8A is fixed to the housing 2A.
  • the holder portion 8A includes a substrate mounting base portion 8Ab similar to the holder portion 8 of the electronic pen 1 of the first embodiment, and an IC constituting a signal processing circuit 9A is provided on the board mounting base portion 8Ab.
  • the arranged printed circuit board 10 is placed.
  • the first embodiment of the signal processing circuit 9A is different in that the signal supplied to the conductor core portion 51 of the core body 5 includes information on the inclination detected by the inclination detection circuit 68 of the displacement detection unit 6A. It has the same configuration as the signal processing circuit 9 in the electronic pen 1 of the above.
  • a front cap 3A is attached to the end portion via the light transmitting portion 16.
  • the light transmitting portion 16 is made of a tubular light transmitting resin or a glass member, and the inner wall surface side thereof is configured to be a concave lens as shown in FIG.
  • the light transmitting portion 16 is bonded to the housing 2A and the front cap 3A by, for example, an adhesive.
  • the light transmitting portion 16 may be bonded to the housing 2A and the front cap 3A by melting the light transmitting portion 16 with a laser, for example.
  • the front cap 3A is made of an insulating member, for example, a resin, and in the electronic pen 1A of the second embodiment, only a portion corresponding to the tapered portion 3b of the front cap 3 of the electronic pen 1 of the first embodiment is provided. It is configured to have.
  • a shield member 14A made of a conductive material, in this example, a conductive metal is provided at a position on the outer peripheral surface of the front cap 3A so as to surround at least the periphery of the conductor core portion 51 of the core body 5. ing.
  • the front cap 3A is integrally formed with the holding portion 3Ad of the core fitting member 7, and the holding portion 3Ad is used in the same manner as the electronic pen 1 of the first embodiment.
  • the core fitting member 7 is held in a state where the end surface 7S faces the displacement detecting portion 6A and is movable in the axial direction.
  • the laser beam from the light emitting portion of the displacement detection unit 6A is contained in the space between the displacement detection unit 6 and the end face 7S surrounded by the light transmission unit 16. Is guided not only to the end face 7S but also to the light transmitting portion 16 side, and the reflected light from the outside is collected through the light transmitting portion 16 and received by the light receiving portion of the displacement detecting unit 6A.
  • Lens 17 is arranged.
  • laser light from the light emitting unit of the displacement detection unit 6A is projected onto the end surface 7S between the displacement detection unit 6A and the end surface 7S, and the reflected light is reflected by the light receiving unit of the displacement detection unit 6A.
  • a lens for receiving light may be separately provided. However, these lenses are not indispensable and may not be provided.
  • the displacement detecting unit 6A detects the displacement of the end face 7S in the axial direction, so that the electronic pen of the first embodiment is detected. In the same manner as in 1, the pressure (writing pressure) applied to the tip portion 5b of the core body 5 is detected.
  • the emitted light Tp of the laser light from the light emitting unit of the displacement detecting unit 6A passes through the light transmitting unit 16 to the sensor surface of the position detection sensor ( The light receiving light Rp of the light projected on the position indicating input surface) 100S and reflected by the sensor surface 100S is received by the light receiving unit of the displacement detecting unit 6A through the light transmitting unit 16.
  • the displacement detection unit 6A determines the tilt angle ⁇ of the electronic pen 1A with respect to the sensor surface 100S of the position detection sensor based on the phase difference between the emitted light Tp at this time and the received light Rp of the reflected light from the sensor surface 100S. To detect.
  • FIG. 6 is a diagram showing a configuration example of the displacement detection unit 6A of the electronic pen 1A of the second embodiment.
  • the displacement detection unit 6A of the electronic pen 1A of the second embodiment includes a TOF controller 63A having a function for detecting the tilt angle of the electronic pen 1A, and the TOF controller 63A.
  • the pen pressure detection circuit 67 and the tilt detection circuit 68 are connected and provided.
  • Other configurations are the same as the displacement detection unit 6 of the electronic pen 1 of the first embodiment.
  • the TOF controller 63A of the displacement detection unit 6A of this example not only the phase difference PHd1 between the received light Rp and the emitted light Tp from the end surface 7S but also the received light Rp of the reflected light from the sensor surface 100S of the position detection sensor.
  • the phase difference PHd2 from the emitted light Tp is detected.
  • the phase difference PHd1 and the phase difference PHd2 are large. The difference is also large, and the TOF controller 63A can detect the phase difference PHd1 and the phase difference PHd2 separately.
  • the TOF controller 63A has the same phase difference PHd1 as the TOF controller 63 of the displacement detection unit 6 of the electronic pen 1 of the first embodiment when no pressure is applied to the tip portion 5b of the core body 5.
  • the difference ⁇ PHd1 between the phase difference value and the phase difference value when pressure (writing pressure) is applied to the tip portion 5b of the core body 5 is detected, and the difference ⁇ PHd1 is supplied to the pen pressure detection circuit 67. do.
  • the pen pressure detection circuit 67 detects the pressure (pen pressure) applied to the tip portion 5b of the core body 5 by using (Equation 1) and (Equation 2).
  • the TOF controller 63A supplies the information of the phase difference PHd2 to the tilt detection circuit 68 for the phase difference PHd2.
  • the tilt detection circuit 68 includes a correspondence table between the value of the phase difference PHd2 and the tilt angle ⁇ with respect to the sensor surface 100S of the electronic pen 1A, and this correspondence table is referred to by the value of the phase difference PHd2. By doing so, the tilt angle of the electronic pen 1A at that time is detected.
  • the information in the corresponding table is stored in association with each other by measuring the value of the phase difference PHd2 in the state where the tilt angle ⁇ is in the range of 0 to 90 degrees, for example, at the tilt angle for each degree. It can be formed by.
  • the tilt angle is formed by measuring the value of the phase difference PHd2 at a coarse angle, for example, at a tilt angle of every 5 degrees in the range of 0 to 90 degrees, and storing them in association with each other.
  • the intermediate slope for each degree may be calculated by an interpolation calculation.
  • the tilt detection circuit 68 can calculate the distance between the displacement detection unit 6A and the sensor surface 100S by calculation from the value of the phase difference PHd2.
  • the distance between the tip portion 5b of the core body 5 and the displacement detecting portion 6A is constant, and the light emitted from the displacement detecting portion 6A and the light transmitted through the light transmitting portion 16 with respect to the axial direction of the electronic pen 1A. Since the direction of the central axis of is fixed, the tilt detection circuit 68 can also calculate the tilt angle ⁇ of the electronic pen 1A from the distance calculated from the value of the phase difference PHd2.
  • the information on the tilt angle ⁇ of the electronic pen 1A detected as described above is supplied from the tilt detection circuit 68 to the signal processing circuit 9A.
  • the signal processing circuit 9A uses the information of the pen pressure detected by the pen pressure detection circuit 67 and the information of the tilt angle ⁇ detected by the tilt detection circuit 68 as the conductor core of the core body 5. It is supplied to the unit 51.
  • the electronic pen 1A of the second embodiment in addition to the information on the writing pressure, the information on the tilt angle ⁇ of the electronic pen 1A can be obtained from the displacement detecting unit 6A, which has a remarkable effect.
  • the elastic member 4 is provided between the tip portion 5b of the core body 5 and the tip end side ends of the front caps 3 and 3A.
  • the elastic member 4 may be omitted, and a space in the axial direction may be provided between the front caps 3 and 3A and the ring-shaped end surface 5c of the step portion of the tip portion 5b of the core body 5.
  • it is not necessary to provide a step portion having the ring-shaped end surface 5c of the tip portion 5b of the core body 5, so that the core body 5 is constant from the tip end to the rear end.
  • It may be a rod-shaped one having a diameter of the above, or further, the core body 5 may be formed by omitting the cover portion 52 and using only the conductor core portion 51.
  • the elastic member 15 is made of a high-performance urethane foam member in the above-described embodiment, it may have another structure such as a coil spring. Then, the arrangement position of the elastic member 15 only needs to be able to return the core body fitting member 7 and the core body 5 to the state before the pressure is applied, so that the core as in the example of the above-described embodiment is used.
  • the position is not limited to the position between the body fitting member 7 and the holding member 11.
  • the elastic member 15 holds the end face 7S and the displacement detecting portions 6 and 6A at positions that do not interfere with or affect the emitted light and the received light from the displacement detecting portions 6 and 6A. It may be provided between the holder portions 8 and 8A.
  • the end surface 7S is configured to be a mirror-finished surface of the end surface forming portion 73 on the rear end side of the core body fitting member 7 to which the core body 5 is fitted.
  • an end face forming portion having a mirror-finished surface may be fitted to the rear end side of the core body 5.
  • the end surface on the rear end side of the core body 5 itself may be mirror-finished to obtain the end surface 7S.
  • the end face 7S is arranged so as to be orthogonal to the axial direction of the electron pens 1 and 1A, but it is not necessary to be orthogonal to each other. Further, the displacement detecting units 6 and 6A may not be provided at the center position of the axis of the electronic pen as long as the light can be projected onto the end surface B surface 7S and the reflected light can be received.
  • the light transmitting portion 16 has a cylindrical portion having a constant diameter, but is formed so as to cover a part of the tapered portion of the front cap 3A. May be good. Further, the light transmitting portion 16 may be provided only on the tapered portion of the front cap 3A.
  • the light transmitting portion 16 has a concave lens configuration, but it is not always necessary to have a lens configuration as in this example.
  • the displacement detection unit 6A is configured to include both the tilt detection circuit 68 and the pen pressure detection circuit 67, but even if only the tilt detection circuit 68 is used. good.
  • a conventional pen pressure detecting unit as described at the beginning can be used instead of the optical configuration by the displacement detecting unit.
  • the electronic pens 1 and 1A of the first and second embodiments described above are examples of the case of the active capacitance type electronic pen, but the present invention is not limited to this, and for example, an electromagnetic induction type electronic pen may be used.
  • the position indicator according to the present invention is not limited to the configuration of a pen-shaped electronic pen, and may have any shape as long as it has a core and a pen pressure detection unit. good.
  • displacement detection units 6 and 6A are not limited to the configuration using the TOF sensor.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un stylo électronique dans lequel la pression appliquée à une partie d'extrémité distale d'un corps central peut être détectée sans que ladite pression soit appliquée directement à une unité de détection.　La présente invention comprend : un corps central dont une partie d'extrémité distale fait saillie depuis une ouverture dans un boîtier, le corps central étant installé de telle sorte qu'un déplacement correspondant à la pression appliquée à la partie d'extrémité distale puisse se produire ; une surface d'extrémité qui présente un déplacement correspondant au déplacement du corps central ; et une unité de détection de déplacement qui détecte un déplacement correspondant à l'amplitude de la pression sur la surface d'extrémité. L'unité de détection de déplacement est munie d'une unité d'émission de lumière et d'une unité de réception de lumière, et est configurée de telle sorte que la lumière d'émission de l'unité d'émission de lumière est projetée sur la surface d'extrémité, et la lumière de réception, qui est produite en raison de la lumière d'émission étant réfléchie par la surface d'extrémité et retournée, est reçue par l'unité de réception de lumière. L'unité de détection de déplacement détecte le déplacement de la surface d'extrémité sur la base de la différence de phase entre la lumière d'émission et la lumière de réception. La pression appliquée au corps central est détectée sur la base du déplacement de la surface d'extrémité tel que détecté par l'unité de détection de déplacement.
PCT/JP2021/016612 2020-05-29 2021-04-26 Indicateur de position WO2021241102A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023100579A1 (fr) * 2021-12-03 2023-06-08 株式会社ワコム Stylo électronique et corps central pour stylo électronique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09305693A (ja) * 1996-03-14 1997-11-28 Pentel Kk 座標入力及びバーコード入力兼用装置
WO2017033225A1 (fr) * 2015-08-21 2017-03-02 株式会社ワコム Stylet et procédé de transmission d'informations de couleur
JP2020071573A (ja) * 2018-10-30 2020-05-07 セイコーエプソン株式会社 表示装置、表示システム、及び表示方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09305693A (ja) * 1996-03-14 1997-11-28 Pentel Kk 座標入力及びバーコード入力兼用装置
WO2017033225A1 (fr) * 2015-08-21 2017-03-02 株式会社ワコム Stylet et procédé de transmission d'informations de couleur
JP2020071573A (ja) * 2018-10-30 2020-05-07 セイコーエプソン株式会社 表示装置、表示システム、及び表示方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023100579A1 (fr) * 2021-12-03 2023-06-08 株式会社ワコム Stylo électronique et corps central pour stylo électronique

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