WO2016152732A1 - Dispositif d'entrée rotatif - Google Patents

Dispositif d'entrée rotatif Download PDF

Info

Publication number
WO2016152732A1
WO2016152732A1 PCT/JP2016/058542 JP2016058542W WO2016152732A1 WO 2016152732 A1 WO2016152732 A1 WO 2016152732A1 JP 2016058542 W JP2016058542 W JP 2016058542W WO 2016152732 A1 WO2016152732 A1 WO 2016152732A1
Authority
WO
WIPO (PCT)
Prior art keywords
detection signal
variable capacitance
stop position
unit
pulse voltage
Prior art date
Application number
PCT/JP2016/058542
Other languages
English (en)
Japanese (ja)
Inventor
正史 田端
Original Assignee
アルプス電気株式会社
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 アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to JP2017508298A priority Critical patent/JP6302133B2/ja
Publication of WO2016152732A1 publication Critical patent/WO2016152732A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement
    • 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0362—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 1D translations or rotations of an operating part of the device, e.g. scroll wheels, sliders, knobs, rollers or belts

Definitions

  • the present invention relates to a rotary input device such as a rotary encoder, and more particularly to a rotary input device that detects rotation using a change in capacitance.
  • Patent Document 1 a device that detects the rotation of an operating body using a change in capacitance is known.
  • Patent Document 1 a plurality of fixed electrodes arranged on a fixed plate, a rotating plate arranged to be rotatable so as to face the fixed plate, and arranged on the rotating plate so as to face the fixed electrode
  • a rotary electrostatic encoder having a rotary electrode formed thereon is described.
  • a method of detecting the capacitance of a capacitor formed between the fixed electrode and the movable electrode by applying a ground potential to the movable electrode and applying a pulse voltage from the fixed electrode to the ground potential is also considered. It is done.
  • this method when the electrostatic capacitance with the movable electrode is detected at a plurality of detection positions, a drive electrode is required for each detection position, and a circuit for detecting the accumulated charge of the capacitor is required for each detection position. Therefore, there is a problem that the circuit scale becomes large.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a rotary input device circuit device capable of detecting the rotation of the operation unit with a simple configuration.
  • the rotary input device includes a base portion, an operation portion rotatably supported by the base portion, and a first portion provided in the operation portion and having the same distance from the rotation axis of the operation portion.
  • a central angle corresponding to an arc sandwiched between a plurality of movable electrodes arranged at equal intervals on the circumference of the virtual circle and two adjacent movable electrodes on the circumference of the first virtual circle is divided into N equal parts.
  • N represents an integer of 3 or more.
  • the variable capacitance element includes a pair of fixed electrodes provided on the base portion and arranged adjacent to each other on the circumference of the second virtual circle. Each fixed electrode in the pair of fixed electrodes is provided at a position where it can overlap with the common movable electrode when viewed from a direction parallel to the rotation axis when the operation unit is at the stop position.
  • the plurality of variable capacitance elements are provided at different positions on the circumference of the second virtual circle.
  • the detection signal generation unit inputs the charge from one fixed electrode in each pair of fixed electrodes forming the plurality of variable capacitance elements, and generates the detection signal according to the sum of the input charges.
  • each fixed electrode in the pair of fixed electrodes may overlap the common movable electrode when viewed from the direction parallel to the rotation axis when the operation unit is at the stop position. Since it is provided at a position, the capacitance of the variable capacitance element varies greatly depending on whether or not the movable electrode is at a position where it overlaps with the pair of fixed electrodes. That is, the capacitance of each variable capacitance element changes according to the stop position of the operation unit. Since such variable capacitance elements are provided at different positions on the circumference of the second virtual circle, the stop position of the operation portion is obtained according to the change in capacitance of each variable capacitance element, and the operation portion is rotated. The direction can be determined.
  • the charge is input from one fixed electrode of each pair of fixed electrodes forming the plurality of variable capacitance elements, and the detection signal corresponding to the sum of the input charges is generated. Is done. Therefore, since the change in capacitance of the variable capacitance element at a plurality of different positions on the circumference of the second virtual circle is represented by one detection signal, a detection signal is generated for each of the plurality of positions. Compared with the circuit configuration is simplified.
  • one fixed electrode is shared by a pair of two fixed electrodes forming two variable capacitance elements, and the charge is input from the shared fixed electrode to the detection signal generation unit. Good. According to said structure, since the number of fixed electrodes reduces, a structure becomes simple.
  • the movable electrode may be included in the range of the fan-shaped region having the unit rotation angle as viewed from the center of the first virtual circle.
  • the movable electrode has two arcs on the circumference of two circles having the same center and different diameter as the first virtual circle, and two straight lines extending radially from the center at the unit rotation angle. It may have a planar shape surrounded by the above two line segments.
  • the fixed electrode may have the same shape as the movable electrode.
  • the movable electrode may be included in a fan-shaped region having an angle of 1 to 1.5 times the unit rotation angle as viewed from the center of the first virtual circle.
  • the fixed electrode may be included in a range of a sector region having an angle not less than 0.5 times and not more than 1 times the unit rotation angle as viewed from the center of the second virtual circle.
  • each fixed electrode in the pair of fixed electrodes is located at a position where an overlap of the same area as that of the common movable electrode can be generated when the operation unit is at the stop position when viewed from a direction parallel to the rotation axis. May be provided.
  • the pulse voltage supply unit is generated by the detection signal generation unit at three stop positions when the operation unit is rotated three steps from the predetermined stop position in a predetermined direction by the unit rotation angle.
  • a pulse voltage may be supplied to each of the plurality of variable capacitance elements so that the two detection signals have different levels.
  • the signal processing unit may determine a rotation direction of the operation unit based on a change in the detection signal corresponding to a change in capacitance of the variable capacitance element.
  • the plurality of variable capacitance elements are configured such that the fixed electrode pair and the movable electrode are movable at a first step stop position when the operation unit is rotated by three unit rotation angles from a predetermined stop position in a predetermined direction.
  • the pulse voltage supply unit reverses the charge accumulated in the first variable capacitance element at the stop position of the first step and the charge accumulated in the second variable capacitance element at the stop position of the second step.
  • the pulse voltage may be supplied to the first variable capacitance element and the second variable capacitance element so as to have the same polarity or the same polarity and different sizes.
  • the detection signal generation unit generates the detection signal according to a sum of charges accumulated in the first variable capacitance element and the second variable capacitance element by supplying the pulse voltage, and performs the three-step rotation.
  • the detection signal having an intermediate value between the detection signal at the stop position of the first step and the detection signal at the stop position of the second step may be generated at the stop position of the third step. .
  • a support member may be provided that includes a flange portion that is fixed to the flat portion of the base portion and protrudes perpendicularly to the rotation axis.
  • the operation portion may have a ring-shaped edge portion that is fitted between the flat portion and the flange portion.
  • the movable electrode may be provided on the ring-shaped edge.
  • the support member may be a conductor connected to a ground potential. According to said structure, since a movable electrode is shielded by the said ring-shaped edge part which is a conductor connected to the ground potential, it becomes difficult to receive the influence of the noise which propagates from an operator's finger
  • the base part may be a flat plate member in which a part of the flat part is used as an operation area of the touch sensor.
  • the fixed electrode may be formed on a surface of the base portion opposite to the planar portion.
  • FIG. 1 It is a figure which shows an example of a structure of the rotary input device which concerns on embodiment of this invention. It is sectional drawing of a rotary input device. It is the figure which looked at the operation part of the rotary input device from the back side. It is a figure which shows an example of the electrode pattern provided in the back surface of the base part. It is a figure which shows the positional relationship of a movable electrode and a fixed electrode. It is a figure which shows an example of the structure in connection with the detection of rotation in the rotary input device which concerns on this embodiment. It is a figure which shows an example of a structure of a touch sensor.
  • FIG. 15 is a diagram showing the state of a stop position represented by a combination of two detection signals corresponding to the two pulse voltage patterns shown in FIG. 14 in numerical form. It is the figure showing the transition of the state ST of each stop position shown in FIG. It is a figure for demonstrating the drive method of the variable capacitance element (pair of fixed electrode) in the rotary input device which concerns on 3rd Embodiment.
  • FIG. 1 is a diagram illustrating an example of a configuration of a rotary input device according to an embodiment of the present invention.
  • the rotary input device according to the present embodiment is a device that detects a user's rotation operation using a change in capacitance between electrodes, and also has a function as a capacitive touch sensor.
  • the rotary input device shown in FIG. 1 includes a base 5 having an operation area 1 of a touch sensor and an operation unit 10 that is rotatably supported by the base 5.
  • the base 5 is a plate-like member such as glass, for example, and electrode patterns for rotation detection and touch sensor are formed on the surface opposite to the surface on which the operation unit 10 is attached.
  • the front side plane corresponding to the area where the electrode pattern for the touch sensor is formed is used as the operation area 1 of the touch sensor.
  • FIG. 2 is a view showing a cross section taken along line A-A ′ in FIG.
  • a columnar support member 7 is fixed to the flat portion 51 on the front side of the base portion 5.
  • the operation unit 10 is rotatably supported by the base unit 5 by the support member 7.
  • the support member 7 has a flange portion 71 protruding perpendicularly to the rotation axis AX. Between the flange portion 71 and the flat portion 51 of the base portion 5, the ring-shaped edge portion 11 of the operation portion 10 is fitted.
  • a plurality of bearings 18 are provided between the support member 7 and the operation unit 10.
  • the support member 7 is made of a conductive material and is connected to the ground potential. Accordingly, the ring-shaped edge portion 11 of the operation unit 10 is covered with the flange portion 71 having the ground potential as viewed from the front side of the operation unit 10.
  • a movable electrode (EM1 to EM8), which will be described later, is provided on the edge 11 of the operation unit 10.
  • FIG. 3 is a view of the operation unit 10 as viewed from the back side, and shows the back surface of the operation unit 10 facing the flat surface part 51 of the base unit 5.
  • eight movable electrodes EM1 to EM8 arranged at equal intervals on the circumference of the first virtual circle IM1 having the same distance from the rotation axis AX of the operation unit 10 are provided.
  • the movable electrodes EM1 to EM8 (hereinafter, any one movable electrode is referred to as “EM”) are included in the range of the fan-shaped region having the unit rotation angle ⁇ as viewed from the center P of the first virtual circle IM1.
  • the movable electrode EM forms a unit rotation angle ⁇ from two arcs Ar1 and Ar2 on the circumference of two circles CY1 and CY2 having the same center P and different diameters from the first virtual circle IM1 and the center P. And has a planar shape surrounded by two line segments Se1 and Se2 on the two straight lines L1 and L2 extending in the radial direction. Fixed electrodes EF1 to EF4 to be described later have the same shape as the movable electrodes EM1 to EM8.
  • the unit rotation angle ⁇ is a rotation angle from one stop position to the next stop position by the moderation mechanism 15 described below.
  • the rotary input device includes a moderation mechanism 15 that suppresses the rotation of the operation unit 10 at a predetermined stop position set for each unit rotation angle ⁇ .
  • the moderation mechanism 15 includes a magnet 15 a provided on the outer periphery of the support member 7 and a magnet 15 b provided on the inner periphery of the operation unit 10.
  • the magnets 15a and 15b have the same number of gear-shaped irregularities, respectively, and suppress the rotation of the operation unit 10 so as to maintain the state in which both convex portions face each other.
  • the unit rotation angle ⁇ is obtained by equally dividing the central angle ⁇ corresponding to the arc sandwiched between the positions of two adjacent movable electrodes on the circumference of the first virtual circle IM1 (N is an integer of 3 or more). Set to an angle. That is, an angle obtained by dividing the rotation angle of one round (360 °) by N times the number of movable electrodes EM is the unit rotation angle ⁇ . In the example of FIG. 3, since the number of movable electrodes is 8 and N is 3, the unit rotation angle ⁇ is 15 °.
  • the eight movable electrodes EM provided in the operation unit 10 have the same shape and are arranged at equal intervals on the circumference of the first virtual circle IM1, the arrangement of the movable electrodes EM viewed from the base unit 5 side. Returns to the same state each time the stop position by the moderation mechanism 15 is rotated in a fixed direction by N steps (3 steps in the example of FIG. 3).
  • FIG. 4 is a diagram illustrating an example of an electrode pattern provided on the back surface of the base unit 5.
  • Drive electrodes ED1 to ED23 and sense electrodes ES1 to ES32 are formed on the back surface of the base 5 as touch sensor electrodes, and fixed electrodes EF1 to EF4 are formed as rotation detection electrodes.
  • These electrodes have, for example, a two-layer structure in which sense electrodes ES1 to ES32 and fixed electrodes EF1 to EF4 are formed on the first layer, and drive electrodes ED1 to ED23 are formed on the second layer above the first layer.
  • the film formation layer 52 is formed.
  • the drive electrodes ED1 to ED23 and the sense electrodes ES1 to ES32 are transparent conductive films such as ITO, and transmit light from a liquid crystal panel (not shown).
  • the drive electrodes ED1 to ED23 and the sense electrodes ES1 to ES32 are arranged in a grid as shown in FIG. 4, and a capacitor CS is formed at each intersection of the drive electrode and the sense electrode.
  • a capacitor CS is formed at each intersection of the drive electrode and the sense electrode.
  • the fixed electrodes EF1 to EF4 are arranged on the circumference of the second virtual circle IM2 obtained by moving the first virtual circle IM1 parallel to the base portion 5 with respect to the rotation axis AX, and are arranged side by side in the example of FIG. Has been.
  • the four fixed electrodes EF1 to EF4 (hereinafter, any one fixed electrode is referred to as “EF”) have three variable capacitance elements VC1 to VC1 whose capacitance changes according to the positional relationship with the movable electrode EM.
  • VC3 is formed (hereinafter, an arbitrary variable capacitance element is referred to as “VC”).
  • the first variable capacitance element VC1 is formed of a pair of adjacent fixed electrodes EF1 and EF2 on the circumference of the second virtual circle IM2.
  • the second variable capacitance element VC2 is formed by a pair of fixed electrodes EF2 and EF3 adjacent on the circumference of the second virtual circle IM2.
  • the third variable capacitor VC3 is formed of a pair of adjacent fixed electrodes EF3 and EF4 on the circumference of the second virtual circle IM2. Therefore, the fixed electrode EF2 is shared by the first variable capacitance element VC1 and the second variable capacitance element VC2, and the fixed electrode EF3 is shared by the second variable capacitance element VC2 and the third variable capacitance element VC3.
  • the fixed electrodes EF2 and EF3 shared by the two variable capacitance elements are connected to a detection signal generation unit 110 described later.
  • FIG. 5 is a diagram showing the positional relationship between the movable electrode EM and the fixed electrode EF.
  • Each fixed electrode in the pair of fixed electrodes EF forming the variable capacitance element VC (the pair of EF1 and EF2, the pair of EF2 and EF3, and the pair of EF3 and EF4 in the example of FIGS. 4 and 5)
  • the moderation mechanism 15 When the moderation mechanism 15 is in the stop position, it is provided at a position where it can overlap with one common movable electrode EM when viewed from the direction parallel to the rotation axis AX.
  • the fixed electrode EF forming the variable capacitance element VC is compared.
  • the capacitance at one stop position where the pair overlaps the movable electrode EM has a large capacitance difference from the capacitance at the other two stop positions where no overlap occurs. Therefore, it is possible to determine whether or not the movable electrode EM exists at a position where it overlaps with the pair of the fixed electrodes EF forming the variable capacitance element VC by examining the change in the capacitance of the variable capacitance element VC. It becomes possible.
  • each fixed electrode in the pair of fixed electrodes EF forming the variable capacitance element VC is parallel to the rotation axis AX when the operation unit 10 is at the stop position of the moderation mechanism 15 described above.
  • the common movable electrode EM is provided at a position where it can overlap with the same area. That is, the fixed electrode EF has the same shape as that of the movable electrode EM, and the unit of the fixed electrode EF is exactly the same as the position of the movable electrode EM when the operation unit 10 is at the stop position when viewed from the direction parallel to the rotation axis AX.
  • a ground electrode EG is formed on the film forming layer 52 on the back surface of the base portion 5 so as to cover the fixed electrode EF (FIG. 2). That is, the fixed electrode EF and the movable electrode EM are sandwiched between the edge 11 of the operation unit 10 having the ground potential and the ground electrode EG. Thereby, it is possible to reduce the influence of noise from an object such as a fingertip approaching from the front side of the base unit 5 or a liquid crystal panel positioned on the back side of the base unit 5.
  • FIG. 6 is a diagram illustrating an example of a configuration relating to rotation detection in the rotary input device according to the present embodiment.
  • the rotary input device includes a pulse voltage supply unit 100, a detection signal generation unit 110, a signal processing unit 120, and a storage unit 130 as a configuration related to rotation detection.
  • the pulse voltage supply unit 100 is a circuit that supplies pulse voltages to the three variable capacitance elements (VC1 to VC3) of the base unit 5, and the pulse voltage supply patterns (pattern A, pattern B, pattern C) are different.
  • the three operation modes (first operation mode, second operation mode, and third operation mode) are repeatedly executed while being switched in a time-sharing manner in order.
  • the stop position (stop position where the pair of fixed electrodes EF1 and EF2 overlaps the movable electrode EM) where the capacitance difference of the capacitance of the first variable capacitance element VC1 increases is “SP1”
  • the second The stop position (stop position where the pair of fixed electrodes EF2, EF3 and the movable electrode EM overlap) where the capacitance difference of the capacitance of the variable capacitor VC2 increases is “SP2”
  • the electrostatic capacity of the third variable capacitor VC3 A stop position (a stop position where the pair of fixed electrodes EF3 and EF4 and the movable electrode EM overlap each other) where the capacitance difference between the capacitors increases is referred to as “SP3”.
  • the stop position of the first step becomes “SP1”
  • the stop position of the second step becomes “SP2”.
  • the stop position of the third step is “SP3”.
  • the pulse voltage supply unit 100 includes the first charge Q1 accumulated in the first variable capacitance element VC1 when the operation unit 10 is at the stop position SP1, and the first voltage Q1 accumulated when the operation unit 10 is at the stop position SP2.
  • the pulse voltage is supplied to the first variable capacitance element VC1 and the second variable capacitance element VC2 so that the second charge Q2 stored in the two variable capacitance element VC2 has a reverse polarity.
  • the pulse voltage supply unit 100 supplies a pulse voltage of a positive voltage “+ V” to the fixed electrode EF1 of the first variable capacitor VC1 and a negative voltage “+” to the fixed electrode EF3 of the second variable capacitor VC2.
  • the pulse voltage supply unit 100 supplies the pulse voltage to the first variable capacitance element VC1 and the second variable capacitance element VC2 so that the first charge Q1 and the second charge Q2 have the same polarity and different sizes. May be. Also in this case, in the detection signal generation unit 110 described later, the detection signal Ds at each stop position can have a different level.
  • the pulse voltage supply unit 100 applies a positive voltage “+ V” to the fixed electrode EF4 of the third variable capacitance element VC3 that does not supply the pulse voltage.
  • the pulse voltage supply unit 100 stores the first charge Q1 in the second variable capacitance element VC2 when the operation unit 10 is at the stop position SP2, and the third when the operation unit 10 is at the stop position SP3.
  • a pulse voltage is supplied to the second variable capacitor VC2 and the third variable capacitor VC3 so that the second charge Q2 is accumulated in the variable capacitor VC3.
  • the pulse voltage supply unit 100 supplies a pulse voltage of a positive voltage “+ V” to the fixed electrode EF2 of the second variable capacitance element VC2, and a negative voltage “to the fixed electrode EF4 of the third variable capacitance element VC3.
  • the ⁇ V ”pulse voltage is supplied, and a ground potential is applied to the common fixed electrode EF3 of the second variable capacitor VC2 and the third variable capacitor VC3.
  • the pulse voltage supply unit 100 applies a positive voltage “+ V” to the fixed electrode EF1 of the first variable capacitance element VC1 that does not supply the pulse voltage.
  • the pulse voltage supply unit 100 stores the first charge Q1 in the first variable capacitance element VC1 when the operation unit 10 is at the stop position SP1, and the third when the operation unit 10 is at the stop position SP3.
  • the pulse voltage is supplied to the first variable capacitor VC1 and the third variable capacitor VC3 so that the second charge Q2 is accumulated in the variable capacitor VC3.
  • the pulse voltage supply unit 100 supplies a pulse voltage of a positive voltage “+ V” to the fixed electrode EF1 of the first variable capacitance element VC1, and a negative voltage “ The ⁇ V ”pulse voltage is supplied, and a ground potential is applied to the fixed electrode EF2 of the first variable capacitor VC1 and the fixed electrode EF3 of the third variable capacitor VC3, respectively.
  • the pulse voltage supply unit 100 synchronizes with the timing when one of the drive electrodes ED1 to ED23 is selected and driven by the touch sensor drive unit 210 in the touch sensor 2 described later, and the pulse voltage in each operation mode described above. Supply.
  • the detection signal generation unit 110 is a circuit that generates a detection signal Ds corresponding to charges accumulated in the three variable capacitance elements (VC1 to VC3) by supplying a pulse voltage.
  • the detection signal generation unit 110 includes, for example, a charge amplifier that inputs charge and converts it into a voltage, and an AD converter that samples the voltage and converts it into a digital signal.
  • the detection signal generation unit 110 operates as follows according to the operation mode of the pulse voltage supply unit 100.
  • the detection signal generation unit 110 detects the detection signal Ds (first detection signal Ds1) corresponding to the sum of charges accumulated in the first variable capacitance element VC1 and the second variable capacitance element VC2 by supplying the pulse voltage. ) Is generated. That is, the detection signal generation unit 110 inputs a charge corresponding to the sum of charges accumulated in the fixed electrode EF2 shared by the first variable capacitance element VC1 and the second variable capacitance element VC2, and inputs the input charge. The first detection signal Ds1 corresponding to is generated.
  • the detection signal generation unit 110 distinguishes between the case where the operation unit 10 is at the stop position SP1 or the stop position SP2 and the case where the operation unit 10 is at the stop position SP3, so that the first detection signal Ds1 at the stop position SP1.
  • the detection signal generator 110 sets the first detection signal Ds1 at the stop position SP3 to zero, one of the first detection signals Ds1 at the stop position SP1 and the stop position SP2 is positive and the other is negative.
  • First detection signal Ds1 is generated.
  • the detection signal generation unit 110 detects the detection signal Ds (second detection signal Ds2) corresponding to the sum of charges accumulated in the second variable capacitance element VC2 and the third variable capacitance element VC3 by supplying the pulse voltage. ) Is generated. That is, the detection signal generation unit 110 inputs a charge corresponding to the sum of the charges accumulated in the fixed electrode EF3 shared by the second variable capacitance element VC2 and the third variable capacitance element VC3. A second detection signal Ds2 corresponding to the above is generated.
  • the detection signal generation unit 110 makes a distinction between when the operation unit 10 is at the stop position SP2 or the stop position SP3 and when it is at the stop position SP1, so that the second detection signal Ds2 at the stop position SP2 is obtained. And a second detection signal Ds2 having a different value (for example, an intermediate value) from the second detection signal Ds2 at the stop position SP3.
  • the detection signal generation unit 110 sets the second detection signal Ds2 at the stop position SP1 to zero, one of the second detection signals Ds2 at the stop position SP2 and the stop position SP3 becomes positive and the other becomes negative.
  • the second detection signal Ds2 is generated.
  • the detection signal generation unit 110 detects the detection signal Ds (third detection signal Ds3) corresponding to the sum of charges accumulated in the first variable capacitance element VC1 and the third variable capacitance element VC3 by supplying the pulse voltage. ) Is generated. That is, the detection signal generation unit 110 inputs and inputs charges corresponding to the sum of charges accumulated in the fixed electrode EF2 of the first variable capacitance element VC1 and the fixed electrode EF3 of the third variable capacitance element VC3. A third detection signal Ds3 corresponding to the charge is generated.
  • the detection signal generation unit 110 distinguishes between the case where the operation unit 10 is at the stop position SP1 or the stop position SP3 and the case where the operation unit 10 is at the stop position SP2, so that the third detection signal Ds3 at the stop position SP1 is obtained. And a third detection signal Ds3 having a different value (for example, an intermediate value) from the third detection signal Ds3 at the stop position SP3.
  • the detection signal generation unit 110 sets the third detection signal Ds3 at the stop position SP2 to zero, one of the third detection signals Ds3 at the stop position SP1 and the stop position SP3 becomes positive and the other becomes negative.
  • the third detection signal Ds3 is generated.
  • the signal processing unit 120 determines the presence / absence of rotation of the operation unit 10 and the rotation direction based on the detection signal Ds generated by the detection signal generation unit 110.
  • the signal processing unit 120 includes the first detection signal Ds1, the second detection signal Ds2, and the second detection signal Ds2 corresponding to the change in capacitance of the variable capacitance element VC (capacitance change caused when the movable electrode EM overlaps the pair of fixed electrodes EF). Based on the change of the third detection signal Ds3, the rotation direction of the operation unit 10 is determined.
  • the signal processing unit 120 adds a detection signal (Ds1-Ds2) generated by subtracting the second detection signal Ds2 from the first detection signal Ds1, and adds the second detection signal Ds2 and the third detection signal Ds3.
  • the rotation direction of the operation unit 10 is determined based on the detection signal (Ds2 + Ds3) generated in this way and the change in the detection signal (Ds1 + Ds3) generated by adding the first detection signal Ds1 and the third detection signal Ds3. .
  • the combination of these three signals represents the state of the stop position of the operation unit 10 as will be described later.
  • the signal processing unit 120 identifies the change from one stop position to the adjacent stop position by tracking the state of the stop position specified from the combination of the three signals, and determines the rotation direction of the operation unit 10. .
  • the signal processing unit 120 evaluates a change in detection signal corresponding to a change in capacitance of the variable capacitance element VC (capacitance change caused when the movable electrode EM overlaps the pair of fixed electrodes EF).
  • the change pattern of the detection signal is determined based on the difference between the detection signal and the detection signal, and the rotation direction of the operation unit 10 is determined based on the determined change pattern.
  • the signal processing unit 120 calculates a difference between the first detection signal Ds1 and the reference value R1, a difference between the second detection signal Ds2 and the reference value R2, and a difference between the third detection signal Ds3 and the reference value R3, respectively.
  • the signal processing unit 120 compares each of the calculated detection signals with two predetermined threshold values to determine which of the three levels each detection signal corresponds to.
  • the combination of the ternary levels determined for each detection signal represents the state of the stop position of the operation unit 10 as will be described later. Therefore, the signal processing unit 120 can determine the rotation direction of the operation unit 10 based on the determined level (detection signal change pattern).
  • the signal processing unit 120 updates the above-described reference value R used for determining the change pattern of the detection signal under a predetermined condition. That is, if the change in the detection signal does not continuously occur for a certain time, the signal processing unit 120 sets the previous reference value as a new reference based on the average value of the detection signal after the last change in the detection signal occurs. Update to value. Specifically, when the signal processing unit 120 determines that a change has occurred in the detection signal from the determination result of the change pattern, each time the reference value R is acquired from the storage unit 130, the one reference value R Is used to calculate an average value after occurrence of a change for the detection signal to be subjected to the change pattern determination, and the calculated average value is stored in the storage unit 130 in association with the one reference value R.
  • the signal processing unit 120 newly sets the previous reference value R based on the average value stored in the storage unit 130 in association with the reference value R. To a new reference value R.
  • the reference value R is updated based on the average value of the stable detection signal when no change in the detection signal occurs for a certain period of time. Therefore, the reference value R varies greatly due to drift caused by a temperature change or the like. Even in this case, an appropriate reference value R can be obtained following this variation.
  • the signal processing unit 120 changes the reference value R for each drive state of the touch sensor 2 in order to compensate for variations in the reference value R due to the influence of the drive pulse voltage of the drive electrodes ED1 to ED23 in the touch sensor 2. That is, the signal processing unit 120 acquires the reference value R prepared for each driving state of the touch sensor 2 from the storage unit 130 and uses the reference value R to determine the change pattern of the detection signal.
  • the storage unit 130 includes drive electrodes (ED1 to ED3) that are selected and driven by the touch sensor 2, sense electrodes (ES1 to ES32) that are selected for detecting capacitance, and the pulse voltage supply unit 100.
  • the reference value R of the detection signal is stored in association with the operation modes (first operation mode to third operation mode).
  • the signal processing unit 120 receives detection signals (Ds1 to Ds3) generated by a specific operation mode executed at a timing synchronized with the timing at which the specific drive electrode and the sense electrode are selected in the touch sensor 2, A reference value R corresponding to the selected combination of the specific drive electrode and the sense electrode and corresponding to the executed specific operation mode is acquired from the storage unit 130, and the acquired reference value R is used.
  • a change pattern of the detection signal is determined.
  • the processing of the signal processing unit 120 may be executed using, for example, a computer that executes processing based on a program stored in the storage unit 130, or at least part of the processing is performed by a dedicated logic circuit (ASIC). Etc.). Or you may perform at least one part process using the same computer as the control part 230 of the touch sensor 2 mentioned later.
  • ASIC dedicated logic circuit
  • the storage unit 130 stores a computer program for executing the processing of the signal processing unit 120, constant data used for the processing (reference value R, etc.), variable data temporarily used in the process, and the like.
  • a volatile memory such as a DRAM or SRAM
  • a nonvolatile memory such as a flash memory, a hard disk, or the like.
  • FIG. 7 is a diagram illustrating an example of the configuration of the touch sensor 2.
  • the touch sensor 2 shown in FIG. 7 includes a sensor unit 200 including drive electrodes ED1 to ED23 and sense electrodes ES1 to ES32, a touch sensor drive unit 210, a touch sensor detection unit 220, a control unit 230, and a storage unit 250.
  • a sensor unit 200 including drive electrodes ED1 to ED23 and sense electrodes ES1 to ES32
  • a touch sensor drive unit 210 including drive electrodes ED1 to ED23 and sense electrodes ES1 to ES32
  • a touch sensor drive unit 210 including a touch sensor drive unit 210, a touch sensor detection unit 220, a control unit 230, and a storage unit 250.
  • the touch sensor drive unit 210 selects one drive electrode in order from the drive electrodes ED1 to ED23, and supplies a pulse voltage to the selected drive electrode.
  • the touch sensor detection unit 220 sequentially selects some of the sense electrodes from the sense electrodes ES1 to ES32 in parallel with the selection of the drive electrodes that the touch sensor drive unit 210 performs to supply the pulse voltage, and performs the selection.
  • the touch detection signal corresponding to the charge QS of the capacitor CS transmitted through the sense electrode is generated.
  • the sense electrodes ES1 to ES32 are divided into two 16 sense electrode groups ES_A and ES_B, and the touch sensor detection unit 220 alternately selects the two sense electrode groups ES_A and ES_B. , 16 touch detection signals corresponding to the 16 sense electrodes are generated in parallel.
  • the control unit 230 is a circuit that controls the overall operation of the touch sensor 2, for example, a computer that performs processing according to an instruction code of a program stored in the storage unit 250, or a logic circuit (ASIC that implements a specific function). Etc.).
  • the control unit 230 controls the drive electrode selection in the touch sensor drive unit 210, the sense electrode selection in the touch sensor detection unit 220, the generation timing of the touch detection signal, and the like. Further, the control unit 230 performs a process of calculating the contact position of the object in the operation region 1 based on the touch detection signal input from the touch sensor detection unit 220.
  • the storage unit 250 stores constant data and variable data used for processing in the control unit 230.
  • the storage unit 230 may store a program executed on the computer.
  • the storage unit 250 is configured using, for example, a volatile memory such as DRAM or SRAM, a nonvolatile memory such as flash memory, a hard disk, or the like.
  • FIG. 8 is a diagram for explaining a driving method of the variable capacitance element VC (a pair of fixed electrodes) in the rotary input device according to the present embodiment.
  • the pulse voltage supply unit 100 supplies a pulse voltage to three fixed electrodes (FE1 to FE4) arranged adjacent to each other by three patterns (pattern A, pattern B, pattern C).
  • the pulse voltage supply unit 100 supplies a pulse voltage of a positive voltage “+ V” to the fixed electrode FE1, applies a ground potential to the fixed electrode FE2, and applies a negative voltage to the fixed electrodes FE3 and FE4.
  • the detection signal generation unit 110 generates the first detection signal Ds1 corresponding to the sum of the charges of the first variable capacitance element VC1 and the second variable capacitance element VC2 transmitted from the fixed electrode FE2.
  • the pulse voltage supply unit 100 supplies a pulse voltage of a positive voltage “+ V” to the fixed electrodes FE1 and FE2, applies a ground potential to the fixed electrode FE3, and applies a negative voltage to the fixed electrode FE4. Supply a pulse voltage of “ ⁇ V”.
  • the detection signal generation unit 110 generates a second detection signal Ds2 corresponding to the sum of charges of the second variable capacitance element VC2 and the third variable capacitance element VC3 transmitted from the fixed electrode FE3.
  • the pulse voltage supply unit 100 supplies a pulse voltage of a positive voltage “+ V” to the fixed electrode FE1, applies a ground potential to the fixed electrodes FE2 and FE3, and applies a negative voltage to the fixed electrode FE4. Supply a pulse voltage of “ ⁇ V”.
  • the detection signal generation unit 110 generates a second detection signal Ds2 corresponding to the sum of charges of the first variable capacitance element VC1 and the third variable capacitance element VC3 transmitted from the fixed electrodes FE2 and FE3.
  • FIG. 9 is a diagram illustrating a pulse voltage supply pattern and a change in the detection signal due to a change in the stop position.
  • the numbers surrounded by circles indicate the numbers of the three stop positions SP1, SP2 and SP3 shown in FIG.
  • alphabets A to C respectively indicate pulse voltage supply patterns.
  • FIG. 9A shows polarities of pulse voltages applied to three variable capacitance elements (VC1, VC2, VC3) corresponding to three stop positions (SP1, SP2, SP3).
  • P indicates a pulse voltage with a positive voltage “+ V”
  • N indicates a pulse voltage with a negative voltage “ ⁇ V”
  • 0 indicates that no pulse voltage is applied.
  • the first detection signal Ds1 generated in the pattern A includes the first variable capacitance element VC1.
  • a level change corresponding to a change from a charge due to the pulse voltage of the positive voltage “+ V” to a charge due to the pulse voltage of the negative voltage “ ⁇ V” of the second variable capacitance element VC2 occurs. If the change from “P” to “N” is expressed by a numerical value “2”, the numerical value indicating the change from “N” to “P” can be expressed by “ ⁇ 2”.
  • the change from “P” to “0” and the change from “0” to “N” correspond to half of the change from “P” to “N”, and therefore can be represented by the numerical value “1”.
  • the change from “N” to “0” and the change from “0” to “P” correspond to half of the change from “N” to “P”, and therefore can be represented by a numerical value “ ⁇ 1”.
  • FIG. 9B to FIG. 9D show the changes in the detection signals (Ds1 to Ds3) when rotating from the reference stop position to another stop position, respectively, “2”, “1”, “ ⁇ 1”, “ -2 ".
  • the reference stop position is represented by a numerical value “0”.
  • This numerical value represents the magnitude of the relative change of the detection signals (Ds1 to Ds3) in five levels. In order to discriminate this level with respect to the actual detection signals (Ds1 to Ds3), it is independent. It is necessary to use these four threshold values. Assuming that the change in capacitance is small, it is desirable that the number of levels to be determined is as small as possible.
  • the three detection signals (Ds1 to Ds3) generated by the three patterns are used. Add and subtract. That is, the signal processing unit 120 generates a detection signal (Ds1-Ds2) generated by subtracting the second detection signal Ds2 from the first detection signal Ds1, and adds the second detection signal Ds2 and the third detection signal Ds3.
  • the detected signal (Ds2 + Ds3) and the detection signal (Ds1 + Ds3) generated by adding the first detection signal Ds1 and the third detection signal Ds3 are calculated.
  • FIG. 10 is a diagram showing a change in signal level due to a change in the stop position of a new detection signal generated by performing addition / subtraction on three detection signals (Ds1 to Ds3).
  • Ds1 ⁇ Ds2 (AB)”, “Ds2 + Ds3 (B + C)”, and “Ds1 + Ds3 (A + C)” is performed on the numerical values in FIGS. 9B to 9D, as shown in FIG. Are aggregated into three levels of “3”, [0], and “ ⁇ 3”. Further, the maximum amplitude of the signal to be determined is increased from 2 to 3 by addition / subtraction with respect to the three detection signals (Ds1 to Ds3). Therefore, the level of the minute detection signal can be accurately determined.
  • FIG. 11 is a diagram quantifying the state of the stop position represented by the combination of the three detection signals (“A ⁇ B”, “B + C”, “A + C”) after addition and subtraction shown in FIG. “ST” in FIG. 11 is obtained by quantifying three detection signals (“AB”, “B + C”, and “A + C”) in a radix-3.
  • the state ST is represented by the following equation.
  • the state ST that can occur during the rotation from the reference stop position to the adjacent stop position is also expressed numerically.
  • the transition of the state ST is “ ⁇ ”, “ ⁇ ”, or “ ⁇ ” depending on which of the “SP1”, “SP2”, and “SP3” is the reference stop position. Divided into patterns.
  • the state transition is “ ⁇ ”
  • the state transition is “ ⁇ ”
  • the reference stop position is “SP2”
  • the state transition is “ ⁇ ”
  • the reference stop position is “SP3”. In this case, the state transition is “ ⁇ ”.
  • FIG. 12 is a diagram illustrating transition of the state ST at each stop position illustrated in FIG. 11.
  • the numerical values of the state ST at each stop position are all different.
  • the numerical value of the state ST that may occur during the rotation from one stop position to another stop position does not overlap with the numerical value of the state ST at each stop position. Therefore, even when the reference stop position is unknown, when the first stop position changes, the three detection signals ("AB", "B + C", By obtaining the state ST of the expression (1) from “A + C”), the signal processing unit 120 can immediately determine the state transition pattern and the current stop position. Therefore, the signal processing unit 120 can accurately determine the rotation direction by comparing the previous stop position with the current stop position.
  • the signal processing unit 120 receives three patterns of detection signals (Ds1 to Ds3) from the detection signal generation unit 110, the signal processing unit 120 acquires reference values (R1 to R3) corresponding to the detection signals from the storage unit 130, and detects the detection signals. The difference between (Ds1 to Ds3) and the reference value (R1 to R3) is calculated. The signal processing unit 120 regards this calculation result as a normal detection signal (Ds1 to Ds3), performs subsequent addition / subtraction processing (FIG. 10) and state ST calculation (equation (1)) to determine the rotation direction. I do. Therefore, if the reference value fluctuates due to the influence of drift such as temperature, the rotational direction cannot be correctly determined. Therefore, the signal processing unit 120 performs a process of updating the reference value based on the average value of the detection signals (Ds1 to Ds3) input from the detection signal generation unit 110.
  • the signal processing unit 120 determines the change pattern of the detection signal based on the difference between the detection signal and the reference value, and always repeats the process of determining the rotation direction of the operation unit 10 based on the determined change pattern.
  • the signal processing unit 120 starts calculating the average value of the detection signals generated by the detection signal generation unit 110 (ST110).
  • the signal processing unit 120 calculates an average value after occurrence of a change for the detection signal to be used to determine the change pattern using the one reference value, The calculated average value is stored in the storage unit 130 in association with the one reference value.
  • the signal processing unit 120 starts counting with a timer in order to measure the elapsed time from the start time (ST120).
  • the signal processing unit 120 is set to a position where the current stop position is a reference (the stop position where the state ST is zero in FIG. 11 and the same as the stop position where the reference value was updated in step ST160 described later). If it becomes (ST130), the current reference value is updated based on the latest detection signal obtained in the detection signal generation unit 110 (ST140). For example, the signal processing unit 120 stores the result obtained by adding a predetermined weight to the latest detection signal and the current reference value in the storage unit 130 as a new reference value. As a result, the reference value can be updated even during the rotation of the operation unit 10.
  • the signal processing unit 120 converts the previous reference value to a new reference value based on the average value started to be calculated in step ST110. Update to For example, the average value calculated in step ST110 is directly stored in the storage unit 130 as a new reference value (ST160). When the update of the reference value is completed, the signal processing unit 120 stops the timer started in step ST120, resets the time measurement value, and ends the average value calculation process (ST170). The signal processing unit 120 executes the above-described processes of steps ST100 to ST170 each time the capacitance is detected and the rotation direction is determined.
  • each fixed electrode EF in the pair of fixed electrodes EF is connected to the rotation axis AX when the operation unit 10 is at the stop position of the moderation mechanism 15. It is provided at a position where it can overlap with the common movable electrode EM when viewed from the parallel direction. Therefore, the capacitance of the variable capacitance element VC varies greatly depending on whether or not the movable electrode EM is in a position where it overlaps with the pair of fixed electrodes EF. That is, the capacitance of each variable capacitance element VC changes according to the stop position of the operation unit 10.
  • variable capacitance elements VC are provided at different positions on the circumference of the second virtual circle IM2, the stop position of the operation unit 10 is obtained according to the change in the capacitance of each variable capacitance element VC, and the rotation direction is determined. It becomes possible to do.
  • the detection signal generation unit 110 charges corresponding to the capacitance are input from one fixed electrode EF in each pair of fixed electrodes EF forming the plurality of variable capacitance elements VC, and the sum of the input charges is input. A corresponding detection signal is generated.
  • the circuit configuration can be simplified.
  • the level of the detection signal after addition / subtraction is increased to three by performing addition / subtraction operations on the three detection signals (Ds1 to Ds3) obtained by the three types of pulse voltage supply patterns.
  • the signal amplitude is increased.
  • the pulse voltage supply pattern is reduced from 3 to 2.
  • FIG. 14 is a diagram for explaining a driving method of a variable capacitance element (a pair of fixed electrodes) in the rotary input device according to the second embodiment.
  • the two operation modes (first operation mode and second operation mode) of the variable capacitance element in the rotary input device according to the second embodiment are the first operation mode and the first operation mode shown in FIG. It is the same as 2 operation modes.
  • FIG. 15 is a diagram showing pulse voltage supply patterns in the two operation modes shown in FIG. 14 and detection signal changes due to changes in the stop position.
  • FIG. 16 is a diagram quantifying the state of the stop position represented by the combination of two detection signals corresponding to the two pulse voltage patterns (pattern A, pattern B) shown in FIG.
  • the state ST is represented by the following equation.
  • a third embodiment of the present invention will be described.
  • a plurality of detection signals Ds are generated by a plurality of pulse voltage supply patterns for the three variable capacitance elements (VC1 to VC3).
  • the state of the stop position is determined from the combination of the change patterns generated in the plurality of detection signals Ds.
  • the determination of the rotation direction of the operation unit 10 is determined based on one detection signal Ds obtained from a single pulse voltage supply pattern.
  • the pulse voltage supply unit 100 has three stop positions (SP1 to SP3) when the operation unit 10 is rotated by three unit rotation angles from a predetermined stop position in a predetermined direction. , Pulse voltages are respectively supplied to the first variable capacitance element VC1 and the second variable capacitance element VC2 so that the three detection signals Ds generated by the detection signal generation unit 110 have different levels.
  • FIG. 18 is a diagram for explaining a driving method of a variable capacitance element (a pair of fixed electrodes) in the rotary input device according to the third embodiment.
  • the pulse voltage supply pattern (pattern A) shown in FIG. 18 is the same as the pulse voltage supply pattern in the first operation mode in FIGS.
  • the pulse voltage supply unit 100 repeatedly executes the supply of the pulse voltage of the pattern A shown in FIG.
  • FIG. 19 is a diagram illustrating a pulse voltage supply pattern in the driving method illustrated in FIG. 18 and changes in the detection signal Ds due to a change in the stop position.
  • FIG. 19A shows the polarities of the pulse voltages applied to the three variable capacitance elements (VC1, VC2, VC3) corresponding to the three stop positions (SP1, SP2, SP3).
  • FIG. 19B shows the change of the detection signal when the operation unit 10 rotates from the stop position to another stop position for each reference stop position as “2”, “1”, “0”, “ ⁇ 1”. , “ ⁇ 2”.
  • FIG. 20 is a diagram illustrating a relative change in the level of the detection signal due to the change of the stop position, and shows a numerical value (FIG. 19B) of the level of the detection signal Ds.
  • the numerical value on the vertical axis of the graph is a value when the reference stop position is “SP3”, but even when the reference stop position is “SP1” or “SP2”, the change in the numerical value represented by the graph is
  • the level change of the detection signal Ds when the rotation in the left direction occurs is “+1” or “ ⁇ 2”, and the detection signal Ds when the rotation in the right direction occurs.
  • the level change is “ ⁇ 1” or “+2”. That is, the level change pattern of the detection signal Ds is different between the rotation to the left and the rotation to the right.
  • the three variable capacitance elements VC1 to VC3 are arranged so that the level of the detection signal Ds changes in a fixed direction (upward or downward) when the operation unit 10 is rotated in a fixed direction from a predetermined stop position. ) Is supplied with a pulse voltage.
  • the signal processing unit 120 determines the rotation direction of the operation unit 10 based on the change of the detection signal Ds corresponding to the change of the capacitance of the first variable capacitance element VC1 and the second variable capacitance element VC2. Specifically, the signal processing unit 120 compares the detection signal Ds (subtraction of the reference value R from the initial detection signal Ds generated by the detection signal generation unit 110) with four predetermined threshold values. Then, it is determined whether the level of the detection signal Ds is “2”, “1”, “0”, “ ⁇ 1”, or “ ⁇ 2”.
  • the signal processing unit 120 determines that the rotation is in the right direction if the level change is “ ⁇ 1” or “+2”, and the level change is If “+1” or “ ⁇ 2”, it is determined that the rotation is in the left direction.
  • the rotation direction of the operation unit 10 can be determined by a single pulse voltage supply pattern, the time required for determining the rotation direction can be shortened. Note that, in the rotary input device according to the present embodiment, as in the rotary input devices according to the first and second embodiments described above, immediately after the stop position is unknown, it is immediately changed by one stop position. Although the stop position cannot be specified, the current stop position can be specified by referring to a plurality of stop position change histories.
  • the movable electrode EM and the fixed electrode EF have the same shape, but the present invention is not limited to this example.
  • the movable electrode EM is shaped so as to be included in the range of a sector region having an angle of 1 to 1.5 times the unit rotation angle ⁇ when viewed from the center of the first virtual circle IM1
  • the EF may have a shape that is included in the range of a sector region having an angle of 0.5 to 1 times the unit rotation angle ⁇ when viewed from the center of the second virtual circle IM2.
  • the pair of fixed electrodes EF can function as the variable capacitance element VC.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Position Input By Displaying (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

L'invention concerne un dispositif de circuit d'un dispositif d'entrée rotatif permettant de détecter, au moyen d'une configuration simple, une rotation d'une unité d'exploitation. Dans une unité de génération de signaux de détection (110), des charges sont entrées en fonction de la capacité par chaque électrode fixe EF des paires d'électrodes fixes EF qui forment une pluralité de condensateurs variables VC, et un signal de détection est généré conformément à la somme des charges entrées. Par conséquent, comme les variations de capacité des condensateurs variables VC à une pluralité d'emplacements différents sur la circonférence d'un second cercle virtuel (IM2) sont représentées par un signal de détection, la configuration du circuit peut être simplifiée en comparaison au cas où des signaux de détection sont générés respectivement pour la pluralité d'emplacements différents.
PCT/JP2016/058542 2015-03-20 2016-03-17 Dispositif d'entrée rotatif WO2016152732A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017508298A JP6302133B2 (ja) 2015-03-20 2016-03-17 回転式入力装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-058428 2015-03-20
JP2015058428 2015-03-20

Publications (1)

Publication Number Publication Date
WO2016152732A1 true WO2016152732A1 (fr) 2016-09-29

Family

ID=56977338

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/058542 WO2016152732A1 (fr) 2015-03-20 2016-03-17 Dispositif d'entrée rotatif

Country Status (2)

Country Link
JP (1) JP6302133B2 (fr)
WO (1) WO2016152732A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61105421A (ja) * 1984-10-29 1986-05-23 Mitsutoyo Mfg Co Ltd 静電容量型エンコ−ダ
JP2012118903A (ja) * 2010-12-03 2012-06-21 Denso Corp 車両用静電タッチパネル
JP2014229468A (ja) * 2013-05-22 2014-12-08 キヤノン株式会社 情報入力装置及び電子機器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61105421A (ja) * 1984-10-29 1986-05-23 Mitsutoyo Mfg Co Ltd 静電容量型エンコ−ダ
JP2012118903A (ja) * 2010-12-03 2012-06-21 Denso Corp 車両用静電タッチパネル
JP2014229468A (ja) * 2013-05-22 2014-12-08 キヤノン株式会社 情報入力装置及び電子機器

Also Published As

Publication number Publication date
JPWO2016152732A1 (ja) 2017-08-31
JP6302133B2 (ja) 2018-03-28

Similar Documents

Publication Publication Date Title
US10082922B2 (en) Increasing the dynamic range of an integrator based mutual-capacitance measurement circuit
JP6417251B2 (ja) 回転式入力装置
JP3681771B2 (ja) タッチスクリーン及び力センサを有するデータ処理装置
JP6310615B2 (ja) 計時器用セッティングステムのための位置センサー
US8330629B2 (en) Rotary input device and revolution sensor using the same
JP6219915B2 (ja) 歯車セットの角度位置検出用の容量式装置を備えた電気機械装置および歯車セットの角度位置検出方法
JP7219615B2 (ja) 操作支援装置
JPH01140013A (ja) ２軸式角速度ジャイロスコープ
JP6313903B2 (ja) 回転式入力装置
JP6417287B2 (ja) 入力装置
JP6302133B2 (ja) 回転式入力装置
KR102059818B1 (ko) 회전체 감지 장치
JP5746582B2 (ja) 入力検出装置及びその制御方法、プログラム、及び記録媒体
CN109586702A (zh) 用于感测旋转主体的设备
JP2014126455A (ja) 静電容量式検出装置
JP2017072468A (ja) 入力装置
JP2017096861A (ja) 入力装置
JP2003254782A (ja) 角度位置検出器
JP6496618B2 (ja) 入力装置
Knežević On the accuracy of position of the linear secular resonance g− g 5 in the proper elements’ space
JP2004061355A (ja) 回転検出装置
JP2016004329A (ja) 静電検出装置
US9069423B2 (en) Buffer-reference self-capacitance measurement
JP5706355B2 (ja) 回転角度検出装置
CN113310452A (zh) 旋钮的旋转检测方法及旋钮组件

Legal Events

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

Ref document number: 16768635

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017508298

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16768635

Country of ref document: EP

Kind code of ref document: A1