WO2024018932A1 - Module de capteur - Google Patents

Module de capteur Download PDF

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Publication number
WO2024018932A1
WO2024018932A1 PCT/JP2023/025326 JP2023025326W WO2024018932A1 WO 2024018932 A1 WO2024018932 A1 WO 2024018932A1 JP 2023025326 W JP2023025326 W JP 2023025326W WO 2024018932 A1 WO2024018932 A1 WO 2024018932A1
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WIPO (PCT)
Prior art keywords
sensor
area
center
base material
gravity
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PCT/JP2023/025326
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English (en)
Japanese (ja)
Inventor
圭助 西本
勇希 橘
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株式会社村田製作所
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Publication of WO2024018932A1 publication Critical patent/WO2024018932A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge

Definitions

  • the present invention relates to a sensor module that includes a sensor that detects deformation of a flexible base material.
  • Patent Document 1 describes an electronic device that detects pressure.
  • the electronic device includes a pressure sensor, a surface panel, and a cushioning material.
  • the front panel, cushion material, and pressure sensor are stacked in this order in the negative direction of the Z-axis.
  • the user presses the front panel.
  • the pressure sensor is pressed by applying force to the pressure sensor via the cushion material.
  • the pressure sensor outputs a signal according to the amount of pressure.
  • An object of the present invention is to provide a sensor module that can identify the position where a flexible base material is deformed.
  • a sensor module includes: a flexible base material having flexibility, the flexible base material having an upper main surface and a lower main surface aligned in the thickness direction of the flexible base material;
  • the upper main surface and the lower main surface have a rectangular shape having a front side and a rear side extending in the left-right direction, and a left side and a right side extending in the front-back direction,
  • the first sensor has a first center line extending in the front-rear direction when viewed in the thickness direction, overlaps with the first center line passing through the midpoint of the front side, and has a first orientation direction. It is arranged parallel to the fore-aft direction.
  • a sensor module includes: A flexible base material having flexibility and having an upper main surface and a lower main surface aligned in the thickness direction of the flexible base material; A first sensor including a first piezoelectric film having piezoelectricity that is uniaxially stretched so that molecules are oriented in a first orientation direction, the first sensor being provided on the lower main surface, and the first sensor comprising: the first sensor outputting a first signal according to the deformation of the first sensor; It is equipped with The upper main surface and the lower main surface have a rectangular shape having a front side and a rear side extending in the left-right direction, and a left side and a right side extending in the front-back direction, A diagonal line of the flexible base material in a top view is defined as a first diagonal line, The first sensor is arranged so that it overlaps the first diagonal line and the first orientation direction is parallel to the first diagonal line when viewed in the thickness direction.
  • X and Y are parts or members of the sensor module.
  • each part of X is defined as follows.
  • the upper part of X means the upper half of X.
  • the upper end of X means the upper end of X.
  • the upper end of X means the upper end of X and its vicinity. This definition also applies to directions other than the upward direction.
  • X is located above Y
  • X is located directly above Y. Therefore, when viewed in the vertical direction, X overlaps Y.
  • "X is located above Y” means that X is located directly above Y, and that X is located diagonally above Y. Therefore, when viewed in the vertical direction, X may or may not overlap Y. This definition also applies to directions other than the upward direction.
  • each part of the first member is defined as follows.
  • the front part of the first member means the front half of the first member.
  • the rear part of the first member means the rear half of the first member.
  • the left part of the first member means the left half of the first member.
  • the right part of the first member means the right half of the first member.
  • the upper part of the first member means the upper half of the first member.
  • the lower part of the first member means the lower half of the first member.
  • the front end of the first member means the end of the first member in the front direction.
  • the rear end of the first member means the rear end of the first member.
  • the left end of the first member means the end of the first member in the left direction.
  • the right end of the first member means the right end of the first member.
  • the upper end of the first member means the upper end of the first member.
  • the lower end of the first member means the lower end of the first member.
  • the front end of the first member means the front end of the first member and the vicinity thereof.
  • the rear end of the first member means the rear end of the first member and its vicinity.
  • the left end of the first member means the left end of the first member and the vicinity thereof.
  • the right end of the first member means the right end of the first member and the vicinity thereof.
  • the upper end of the first member means the upper end of the first member and its vicinity.
  • the lower end of the first member means the lower end of the first member and its vicinity.
  • the position where the flexible base material is deformed can be identified.
  • FIG. 1 is a sectional view of an electronic device EE including a sensor module 1 according to the first embodiment, viewed from the right.
  • FIG. 2 is a diagram showing the configuration of the first sensor 12a.
  • FIG. 3 is a diagram of the flexible base material 11 and the first sensor 12a viewed from above.
  • FIG. 4A is a diagram showing an example of the first signal Sig1 output from the first sensor 12a when the left region ArL is deformed.
  • FIG. 4B is a diagram showing an example of the first signal Sig1 output from the first sensor 12a when the right region ArR is deformed.
  • FIG. 5 is a flowchart showing an example of the processing of the arithmetic circuit 13.
  • FIG. 6 is an upward view of the first sensor 12a included in the sensor module 1a.
  • FIG. 7 is an upward view of the first sensor 12a included in the sensor module 1b.
  • FIG. 8 is an upward view of the first sensor 12a and the second sensor 12b provided in the sensor module 1c.
  • FIG. 9 is an upward view of the first sensor 12a and the second sensor 12b included in the sensor module 1d.
  • FIG. 10 is an upward view of the first sensor 12a and the second sensor 12b provided in the sensor module 1e.
  • FIG. 11 is an upward view of the first sensor 12a, second sensor 12b, third sensor 12c, and fourth sensor 12d included in the sensor module 1f.
  • FIG. 12 is an upward view of the first sensor 12a included in the sensor module 1g.
  • FIG. 13 is an upward view of the first sensor 12a included in the sensor module 1h.
  • FIG. 14 is an upward view of the first sensor 12a and the second sensor 12b included in the sensor module 1i.
  • FIG. 15 is an upward view of the first sensor 12a, second sensor 12b, third sensor 12c, and fourth sensor 12d included
  • FIG. 1 is a sectional view of an electronic device EE including a sensor module 1 according to the first embodiment, viewed from the right.
  • FIG. 2 is a diagram showing the configuration of the first sensor 12a.
  • FIG. 3 is a diagram of the flexible base material 11 and the first sensor 12a viewed from above.
  • the direction is defined as follows. As shown in FIG. 1, the direction in which the upper principal surface UF11 and the lower principal surface DF11 of the flexible base material 11 are lined up in this order is defined as the downward direction. The direction in which the lower principal surface DF11 and the upper principal surface UF11 are lined up in this order is defined as an upward direction. The vertical direction corresponds to the thickness direction of the flexible base material 11. As shown in FIG. 3, the direction parallel to the direction in which the long sides of the flexible base material 11 extend is defined as the left-right direction. The left-right direction is perpendicular to the up-down direction. The direction parallel to the direction in which the short side of the flexible base material 11 extends is defined as the front-back direction.
  • the front-rear direction is orthogonal to the up-down direction and the left-right direction.
  • the up-down direction, left-right direction, and front-back direction are directions defined for the purpose of explanation. Therefore, the up-down direction, left-right direction, and front-back direction during actual use of the sensor module 1 do not necessarily have to match the up-down direction, left-right direction, and front-back direction in this embodiment.
  • a top view refers to a state when the flexible base material 11 is viewed downward.
  • the sensor module 1 is, as shown in FIG. 1, a module included in an electronic device EE such as a smartphone, for example.
  • the sensor module 1 includes a flexible base material 11, a first sensor 12a, and an arithmetic circuit 13, as shown in FIGS. 1 to 3.
  • the flexible base material 11 has an upper main surface UF11 and a lower main surface DF11 arranged in the thickness direction of the flexible base material 11, as shown in FIGS. 1 and 3.
  • the upper main surface UF11 and the lower main surface DF11 are arranged in this order downward.
  • the upper principal surface UF11 and the lower principal surface DF11 have a rectangular shape including a front side and a rear side extending in the left-right direction, and a left side and a right side extending in the front-rear direction.
  • the flexible base material 11 has flexibility. Therefore, the flexible base material 11 is deformed by the external force applied to the flexible base material 11. For example, as shown in FIG. 1, the user 200 pushes the upper main surface UF11 of the flexible base material 11 downward. The flexible base material 11 is deformed by the downward force applied to the flexible base material 11.
  • the flexible base material 11 is, for example, a base material having electronic components such as an organic EL display and a circuit board.
  • the first sensor 12a has a rectangular shape with long sides extending in the front-rear direction and short sides extending in the left-right direction.
  • the first sensor 12a is smaller than the flexible base material 11.
  • the first sensor 12a includes an upper electrode 120, a first piezoelectric film 121a, a lower electrode 122, a charge amplifier (not shown), and an AD converter (not shown).
  • the first piezoelectric film 121a has a sheet shape having short sides extending in the left-right direction and long sides extending in the front-rear direction when viewed in the thickness direction of the flexible base material 11. have. As shown in FIG. 2, the first piezoelectric film 121a has a first piezoelectric film upper main surface SF1 and a first piezoelectric film lower main surface SF2 arranged in the thickness direction of the flexible base material 11.
  • the first piezoelectric film 121a generates an electric charge according to the amount of deformation of the first piezoelectric film 121a. Specifically, the first piezoelectric film 121a generates an electric charge according to the differential value of the displacement of the first piezoelectric film 121a.
  • the first piezoelectric film 121a has piezoelectricity in which molecules are oriented by being uniaxially stretched.
  • the first piezoelectric film 121a is a film made of chiral polymer.
  • the chiral polymer is, for example, polylactic acid (PLA), particularly L-type polylactic acid (PLLA).
  • PLLA which is a chiral polymer, has a main chain having a helical structure.
  • the PLLA has piezoelectricity in which molecules are oriented by being uniaxially stretched.
  • the first piezoelectric film 121a has a piezoelectric constant of d14.
  • the direction in which the molecules of the first piezoelectric film 121a are oriented is defined as a first orientation direction ODa.
  • the first sensor 12a is arranged so that the first orientation direction ODa is parallel to the front-rear direction, as shown in FIG.
  • the first orientation direction ODa forms an angle of 0 degrees or 180 degrees with respect to the front-rear direction.
  • This 0 degree includes, for example, an angle including about 0 degrees ⁇ 10 degrees.
  • 180 degrees includes, for example, an angle of approximately 180 degrees ⁇ 10 degrees.
  • the first piezoelectric film 121a has the polarity of the charge generated when the first piezoelectric film 121a is stretched in the right front direction or the left rear direction. It has a characteristic that is opposite to the polarity of the generated charge.
  • the first piezoelectric film 121a generates negative charges when stretched in the front right direction or the rear left direction.
  • the first piezoelectric film 121a generates a positive charge when compressed, for example, in the front right direction or the rear left direction.
  • the first piezoelectric film 121a generates a positive charge when stretched, for example, in the rear right direction or the front left direction.
  • the first piezoelectric film 121a generates a negative charge when compressed, for example, in the rear right direction or the front left direction.
  • the magnitude of the generated charge depends on the differential value of the amount of deformation of the first piezoelectric film 121a due to expansion or compression.
  • the upper electrode 120 is a ground electrode. Upper electrode 120 is electrically connected to ground potential.
  • the upper electrode 120 has an upper main surface and a lower main surface that are aligned in the thickness direction of the flexible base material 11.
  • the upper electrode 120 is fixed to the first piezoelectric film upper main surface SF1 with an adhesive (not shown).
  • the upper electrode 120 covers the upper main surface SF1 of the first piezoelectric film.
  • the lower electrode 122 is a signal electrode.
  • the lower electrode 122 has an upper main surface and a lower main surface that are aligned in the thickness direction of the flexible base material 11.
  • the lower electrode 122 is fixed to the first piezoelectric film lower main surface SF2 with an adhesive (not shown). As shown in FIG. 2, the lower electrode 122 covers the first piezoelectric film lower main surface SF2.
  • the charge amplifier converts the charge generated by the first piezoelectric film 121a into a voltage signal.
  • the AD converter generates the first signal Sig1 by AD converting the voltage signal.
  • the first sensor 12a is provided on the lower main surface DF11 of the flexible base material 11.
  • the first sensor 12a is fixed to the lower main surface DF11 of the flexible base material 11 with an adhesive (not shown). Thereby, the first sensor 12a expands and contracts in the front direction, the rear direction, the left direction, or the right direction as the flexible base material 11 deforms.
  • the first sensor 12a outputs a first signal Sig1 according to the deformation of the flexible base material 11.
  • the first sensor 12a is arranged near the center of the flexible base material 11 in the left-right direction. Specifically, as shown in FIG. 3, a straight line passing through the midpoint CP1 of the front side of the lower principal surface DF11 and extending in the front-rear direction is defined as a first center line CB1. The first sensor 12a overlaps the first center line CB1 when viewed in the thickness direction of the flexible base material 11.
  • the first sensor 12a is located at the front of the flexible base material 11. Specifically, as shown in FIG. 3, the center of gravity G12a of the first sensor 12a is defined. Moreover, the center of gravity G11 of the flexible base material 11 is defined. When viewed in the thickness direction of the flexible base material 11, the center of gravity G12a of the first sensor 12a is located in front of the center of gravity G11 of the flexible base material 11.
  • the center of gravity G12a of the first sensor 12a or the center of gravity G11 of the flexible base material 11 means the center of gravity as viewed from above, unless otherwise specified. Therefore, the center of gravity in this specification is the center of gravity on a two-dimensional plane.
  • the area located to the right of the center of gravity G12a of the first sensor 12a is defined as a right area ArR.
  • the area located to the left of the center of gravity G12a of the first sensor 12a is defined as a left area ArL.
  • the right region ArR is located to the right and behind the center of gravity G12a of the first sensor 12a when viewed in the thickness direction of the flexible base material 11.
  • the left region ArL is located to the left and behind the center of gravity G12a of the first sensor 12a when viewed in the thickness direction of the flexible base material 11.
  • the polarity of the first signal Sig1 output from the first sensor 12a with respect to the reference potential VF when the right area ArR is pushed downward is the same as when the left area ArL is pushed downward.
  • the polarity of the first signal Sig1 outputted from the first sensor 12a with respect to the reference potential VF is different. This will be explained below with reference to the figures.
  • FIG. 4A is a diagram showing an example of the first signal Sig1 output from the first sensor 12a when the left area ArL is deformed.
  • FIG. 4B is a diagram showing an example of the first signal Sig1 output from the first sensor 12a when the right region ArR is deformed.
  • the horizontal axis of the graphs in FIGS. 4A and 4B indicates time.
  • the vertical axis of the graphs in FIGS. 4A and 4B indicates the output value of the first signal Sig1.
  • Time t1 in FIGS. 4A and 4B is the time when the user 200 starts pressing the flexible base material 11.
  • Time t2 in FIGS. 4A and 4B is the time after time t1, and is the time when the user 200 finishes pressing the flexible base material 11.
  • Time t3 in FIGS. 4A and 4B is a time after time t2.
  • the user 200 presses down the left region ArL, and the first piezoelectric film 121a is stretched in the left rear direction.
  • the first piezoelectric film 121a outputs positive charges. Therefore, the first sensor 12a outputs the first signal Sig1 having a positive polarity with respect to the reference potential VF between time t1 and time t2, as shown in FIG. 4A.
  • the user 200 finishes pressing the left area ArL.
  • the first sensor 12a tries to return to the shape before deformation due to the stress generated in the first sensor 12a. This stress compresses the first piezoelectric film 121a in the right front direction.
  • the first piezoelectric film 121a outputs negative charges. Therefore, the first sensor 12a outputs the first signal Sig1 having a negative polarity with respect to the reference potential VF at time t3 after time t2, as shown in FIG. 4A.
  • the first piezoelectric film 121a is stretched in the right rear direction. In this case, the first piezoelectric film 121a outputs negative charges. Therefore, as shown in FIG. 4A, the first sensor 12a outputs the first signal Sig1 having a negative polarity with respect to the reference potential VF between time t1 and time t2.
  • the first sensor 12a attempts to return to its pre-deformation shape due to the stress generated in the first sensor 12a. This stress compresses the first piezoelectric film 121a in the left front direction.
  • the first piezoelectric film 121a outputs positive charges. Therefore, the first sensor 12a outputs the first signal Sig1 having a positive polarity with respect to the reference potential VF at time t3 after time t2, as shown in FIG. 4B.
  • the arithmetic circuit 13 is provided, for example, on the lower main surface DF11 of the flexible base material 11, as shown in FIG.
  • the arithmetic circuit 13 is provided on the circuit board.
  • the arithmetic circuit 13 is, for example, a CPU (Central Processing Unit).
  • the arithmetic circuit 13 receives the first signal Sig1 output by the first sensor 12a.
  • the arithmetic circuit 13 executes a process (hereinafter referred to as process P) for identifying the position where the flexible base material 11 is pushed downward based on the first signal Sig1 output from the first sensor 12a.
  • process P a process for identifying the position where the flexible base material 11 is pushed downward based on the first signal Sig1 output from the first sensor 12a.
  • FIG. 5 is a flowchart showing an example of the processing of the arithmetic circuit 13.
  • the arithmetic circuit 13 when the arithmetic circuit 13 receives the first signal Sig1, it starts the process P (FIG. 5: START). After starting, the arithmetic circuit 13 determines the polarity of the first signal Sig1 with respect to the reference potential VF (FIG. 6: Step S11).
  • the arithmetic circuit 13 determines whether the right area ArR or the left area ArL has been deformed based on the first signal Sig1 (FIG. 5: Step S12). In this embodiment, the arithmetic circuit 13 determines whether the right region ArR or the left region ArL has been deformed based on the polarity of the first signal Sig1 with respect to the reference potential VF. For example, as shown in FIG. 4A, the arithmetic circuit 13 receives the first signal Sig1 having a positive polarity with respect to the reference potential VF, and then receives the first signal Sig1 having a negative polarity with respect to the reference potential VF. If so, it is determined that the left area ArL has been deformed.
  • the arithmetic circuit 13 After receiving the first signal Sig1 having a negative polarity with respect to the reference potential VF, the arithmetic circuit 13 receives the first signal Sig1 having a positive polarity with respect to the reference potential VF. If so, it is determined that the right area ArR has been deformed.
  • step S11 and step S12 the arithmetic circuit 13 completes the process P (FIG. 5: END).
  • the position where the flexible base material 11 is deformed can be identified without providing the first sensor 12a on the entire lower main surface DF11 of the flexible base material 11.
  • the first piezoelectric film 121a has piezoelectricity in which it is uniaxially stretched and molecules are oriented in the first orientation direction ODa.
  • the first sensor 12a is arranged so that the first orientation direction ODa is parallel to the front-rear direction.
  • the first sensor 12a overlaps the first center line CB1 when viewed in the thickness direction of the flexible base material 11.
  • the arithmetic circuit 13 can specify whether the right area ArR or the left area ArL has been pressed by the user 200 by determining the polarity of the first signal Sig1.
  • the center of gravity G12a of the first sensor 12a is located in front of the center of gravity G11 of the flexible base material 11 when viewed in the thickness direction of the flexible base material 11.
  • the areas of the right region ArR and the left region ArL are the same as those of the right region and the left region in the sensor module (hereinafter referred to as Comparative Example 1) in which the center of gravity of the first sensor coincides with the center of gravity of the flexible base material. It becomes larger compared to the area. Therefore, the arithmetic circuit 13 can identify the deformation of the flexible base material 11 in a larger area than in the first comparative example.
  • FIG. 6 is an upward view of the first sensor 12a included in the sensor module 1a.
  • the configuration of the sensor module 1a only the parts that are different from the configuration of the sensor module 1 will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1 will be omitted.
  • the sensor module 1a has the long sides of the flexible base material 11 extending in the front-back direction, and the short sides of the flexible base material 11 extending in the left-right direction. , which is different from the sensor module 1.
  • the sensor module 1a has the same effects as the sensor module 1.
  • FIG. 7 is an upward view of the first sensor 12a included in the sensor module 1b.
  • the configuration of the sensor module 1b only the parts that are different from the configuration of the sensor module 1 will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1 will be omitted.
  • the sensor module 1b differs from the sensor module 1 in that the first sensor 12a overlaps the outer edge of the flexible base material 11 when viewed in the thickness direction of the flexible base material 11. Specifically, the first sensor 12a is in contact with the midpoint CP1 of the front side of the lower principal surface DF11.
  • the sensor module 1b it becomes easier to specify the position where the flexible base material 11 is deformed.
  • the first sensor 12a is in contact with the midpoint CP1 of the front side of the lower principal surface DF11.
  • the center of gravity G12a of the first sensor 12a in the sensor module 1b is located in front of the center of gravity G12a of the first sensor 12a in the sensor module 1.
  • the area of the right region ArR and the area of the left region ArL in the sensor module 1b are larger than the area of the right region ArR and the area of the left region ArL in the sensor module 1. Therefore, the arithmetic circuit 13 can specify deformation of the flexible base material 11 in a region larger than the sensor module 1.
  • FIG. 8 is an upward view of the first sensor 12a and the second sensor 12b provided in the sensor module 1c.
  • the configuration of the sensor module 1b only the parts that are different from the configuration of the sensor module 1 will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1 will be omitted.
  • the sensor module 1c differs from the sensor module 1 in that it further includes a second sensor 12b.
  • the second sensor 12b is provided on the lower main surface DF11 of the flexible base material 11.
  • the second sensor 12b outputs a second signal Sig2 according to the deformation of the flexible base material 11.
  • the second sensor 12b includes a second piezoelectric film 121b.
  • the second piezoelectric film 121b has piezoelectricity in which it is uniaxially stretched and molecules are oriented in the second orientation direction ODb.
  • the second sensor 12b is arranged so that the second orientation direction ODb is parallel to the front-rear direction.
  • the second sensor 12b overlaps the first center line CB1 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12b of the second sensor 12b is located behind the center of gravity G11 of the flexible base material 11 when viewed in the thickness direction of the flexible base material 11.
  • the right region ArR is located to the right and in front of the center of gravity G12b.
  • the left area ArL is located to the left and in front of the center of gravity G12b.
  • the polarity of the second signal Sig2 output from the second sensor 12b when the right area ArR is pushed downward is the same as the polarity with respect to the reference potential VF when the left area ArL is pushed downward.
  • the polarity of the second signal Sig2 relative to the reference potential VF is different from that of the second signal Sig2.
  • the second sensor 12b when the left area ArL is pressed by the user 200, the second sensor 12b outputs the second signal Sig2 having a negative polarity with respect to the reference potential VF.
  • the second sensor 12b outputs a second signal Sig2 having a positive polarity with respect to the reference potential VF.
  • the arithmetic circuit 13 determines whether the right area ArR or the left area ArL has been pressed based on the first signal Sig1 and the second signal Sig2. In this modification, the arithmetic circuit 13 inverts the second signal Sig2 received from the second sensor 12b with respect to the reference potential VF. In this case, when the left area ArL is pressed by the user 200, the polarity of the first signal Sig1 output from the first sensor 12a becomes the same as the polarity of the second signal Sig2 output from the second sensor 12b. When the right area ArR is pressed by the user 200, the polarity of the first signal Sig1 output from the first sensor 12a becomes the same as the polarity of the second signal Sig2 output from the second sensor 12b.
  • the sensor module 1c can more easily identify deformation of the flexible base material 11.
  • a sensor module that does not include a second sensor hereinafter referred to as Comparative Example 2
  • Comparative Example 2 when the user presses down the rear end of the right region or the rear end of the left region, the amount of deformation of the first sensor is small.
  • Comparative Example 2 the value of the signal output from the first sensor is small.
  • the arithmetic circuit may not be able to identify the deformation of the flexible member.
  • the sensor module 1c further includes a second sensor 12b.
  • the second sensor 12b overlaps the first center line CB1 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12b of the second sensor 12b is located behind the center of gravity G11 of the flexible base material 11.
  • the arithmetic circuit 13 can specify the deformed position of the flexible base material 11 using the second signal Sig2 having a larger output value than the first signal Sig1.
  • FIG. 9 is an upward view of the first sensor 12a and the second sensor 12b included in the sensor module 1d.
  • the configuration of the sensor module 1d only the parts that are different from the configuration of the sensor module 1c will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1c will be omitted.
  • the front end of the first sensor 12a is in contact with the midpoint CP1 of the front side of the lower principal surface DF11, as shown in FIG.
  • the rear end of the second sensor 12b is in contact with the midpoint CP2 of the rear side of the lower principal surface DF11.
  • the sensor module 1d has the same effects as the sensor module 1b and the same effects as the sensor module 1c.
  • FIG. 10 is an upward view of the first sensor 12a and the second sensor 12b provided in the sensor module 1e.
  • the configuration of the sensor module 1e only the parts that are different from the configuration of the sensor module 1c will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1c will be omitted.
  • the second sensor 12b is arranged so that the second orientation direction ODb is parallel to the left-right direction, as shown in FIG. Further, a straight line passing through the midpoint CP3 of the right side of the lower principal surface DF11 and extending in the left-right direction is defined as a second center line CB2. The second sensor 12b overlaps with the second center line CB2. When viewed in the thickness direction of the flexible base material 11, the center of gravity G12b of the second sensor 12b is located to the right of the center of gravity G11 of the flexible base material 11.
  • the front region ArF includes a right front region ArRF and a left front region ArLF.
  • the right front region ArRF is located to the right and behind the center of gravity G12a.
  • the front right region ArRF is located in front and to the left of the center of gravity G12b.
  • the left front region ArLF is located to the left and behind the center of gravity G12a.
  • the left front region ArLF is located in front of and to the left of the center of gravity G12b.
  • the rear area ArB includes a right rear area ArRB and a left rear area ArLB.
  • the right rear region ArRB is located to the right and behind the center of gravity G12a.
  • the right rear region ArRB is located behind and to the left of the center of gravity G12b.
  • the left rear region ArLB is located to the left and behind the center of gravity G12a.
  • the left rear region ArLB is located behind and to the left of the center of gravity G12b.
  • the right region ArR includes a right front region ArRF and a right rear region ArRB.
  • the left region ArL includes a left front region ArLF and a left rear region ArLB.
  • the polarity of the second signal Sig2 output from the second sensor 12b when the front area ArF is pushed downward is different from the polarity with respect to the reference potential VF when the rear area ArB is pushed downward.
  • the polarity of the second signal Sig2 output from the second sensor 12b is different from the reference potential VF.
  • the polarity of the second signal Sig2 with respect to the reference potential VF is positive.
  • the polarity of the second signal Sig2 with respect to the reference potential VF is negative.
  • the arithmetic circuit 13 determines whether the front area ArF or the rear area ArB has been pressed based on the second signal Sig2.
  • the arithmetic circuit 13 in the sensor module 1e determines the combination of the polarity of the first signal Sig1 with respect to the reference potential VF and the polarity of the second signal Sig2 with respect to the reference potential VF. It is possible to specify which region of the rear region ArRB or the left rear region ArLB has been pressed.
  • FIG. 11 is an upward view of the first sensor 12a, second sensor 12b, third sensor 12c, and fourth sensor 12d included in the sensor module 1f. Note that in the configuration of the sensor module 1f, only the parts that are different from the configuration of the sensor module 1e will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1e will be omitted.
  • the sensor module 1f differs from the sensor module 1e in that it further includes a third sensor 12c and a fourth sensor 12d.
  • the third sensor 12c and the fourth sensor 12d are provided on the lower main surface DF11 of the flexible base material 11.
  • the third sensor 12c outputs a third signal Sig3 according to the deformation of the flexible base material 11.
  • the fourth sensor 12d outputs a fourth signal Sig4 according to the deformation of the flexible base material 11.
  • the third sensor 12c includes a third piezoelectric film 121c.
  • the third piezoelectric film 121c has piezoelectricity in which it is uniaxially stretched and molecules are oriented in the third orientation direction ODc.
  • the third sensor 12c is arranged so that the third orientation direction ODc is parallel to the front-rear direction.
  • the third sensor 12c overlaps with the first center line CB1 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12c of the third sensor 12c is located behind the center of gravity G11 of the flexible base material 11.
  • the polarity of the third signal Sig3 output from the third sensor 12c when the right area ArR is pushed downward is the same as the polarity with respect to the reference potential VF when the left area ArL is pushed downward.
  • the polarity of the third signal Sig3 relative to the reference potential VF is different from that of the third signal Sig3.
  • the fourth sensor 12d includes a fourth piezoelectric film 121d.
  • the fourth piezoelectric film 121d has piezoelectricity in which it is uniaxially stretched and molecules are oriented in the fourth orientation direction ODd.
  • the fourth sensor 12d is arranged so that the fourth orientation direction ODd is parallel to the left-right direction.
  • the fourth sensor 12d overlaps the second center line CB2 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12d of the fourth sensor 12d is located to the left of the center of gravity G11 of the flexible base material 11.
  • the polarity of the fourth signal Sig4 which is output from the fourth sensor 12d when the front area ArF is pushed downward, with respect to the reference potential VF is the same as the polarity that is output from the fourth sensor 12d when the rear area ArB is pushed downward.
  • the polarity of the fourth signal Sig4 relative to the reference potential VF is different from that of the fourth signal Sig4.
  • the front right region ArRF is located to the right and in front of the center of gravity G12c.
  • the right front region ArRF is located in front of and to the right of the center of gravity G12d.
  • the left front region ArLF is located to the left and in front of the center of gravity G12c.
  • the left front region ArLF is located in front and to the right of the center of gravity G12d.
  • the right rear region ArRB is located to the right and in front of the center of gravity G12c.
  • the right rear region ArRB is located behind and to the right of the center of gravity G12d.
  • the left rear region ArLB is located to the left and in front of the center of gravity G12c.
  • the left rear region ArLB is located behind and to the right of the center of gravity G12d.
  • the arithmetic circuit 13 determines whether the right area ArR or the left area ArL has been pressed based on the first signal Sig1 and the third signal Sig3. Furthermore, the arithmetic circuit 13 determines whether the front area ArF or the rear area ArB has been pressed based on the second signal Sig2 and the fourth signal Sig4.
  • the sensor module 1f has the same effects as the sensor module 1e and the sensor module 1c.
  • FIG. 12 is an upward view of the first sensor 12a included in the sensor module 1g. Note that in the configuration of the sensor module 1g, only the parts that are different from the configuration of the sensor module 1 will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1 will be omitted.
  • the first orientation direction ODa points to the right and the front.
  • a diagonal line of the flexible base material 11 in a top view of the flexible base material 11 is defined as a first diagonal line TK1.
  • the first diagonal TK1 includes a right front angle RFA formed by the right side and the front side of the lower main surface DF11, a left rear angle LBA formed by the left side and the rear side of the lower main surface DF11, are tied.
  • the first sensor 12a is arranged so that the first orientation direction ODa is parallel to the first diagonal line TK1. The first sensor 12a overlaps the first diagonal line TK1 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12a of the first sensor 12a is located in front of the center of gravity G11 of the flexible base material 11.
  • the distance from the center of gravity G12a of the first sensor 12a to the right front angle RFA is shorter than the distance from the center of gravity G11 of the flexible base material 11 to the right front angle RFA.
  • the area located in front of the first diagonal line TK1 on the lower principal surface DF11 is defined as a front area ArFF.
  • the front region ArFF is surrounded by the first diagonal line TK1, the left side of the lower main surface DF11, and the front side of the lower main surface DF11.
  • a region located after the first diagonal line TK1 on the lower main surface DF11 is defined as a rear region ArBB.
  • the rear region ArBB is surrounded by the first diagonal line TK1, the right side and the rear side of the flexible base material 11.
  • a first straight line SL1 extending in a direction parallel to the first orientation direction ODa is located at the center of gravity G12a of the first sensor 12a.
  • a first straight line SL1 passing through is defined.
  • the front region ArFF and the rear region ArBB are located to the left of the first straight line SL1.
  • the polarity with respect to the reference potential VF of the first signal Sig1 output from the first sensor 12a when the front area ArFF is pushed downward is the same as the polarity output from the first sensor 12a when the rear area ArBB is pushed downward.
  • the polarity of the first signal Sig1 relative to the reference potential VF is different from that of the first signal Sig1.
  • the arithmetic circuit 13 determines whether the front area ArFF or the rear area ArBB has been pressed based on the first signal Sig1. In this modification, the arithmetic circuit 13 determines whether the front area ArFF or the rear area ArBB has been pressed based on the polarity of the first signal Sig1 with respect to the reference potential VF.
  • the arithmetic circuit 13 when the arithmetic circuit 13 receives the first signal Sig1 having positive polarity from the first sensor 12a, it determines that the rear region ArBB has been deformed. Further, for example, when the arithmetic circuit 13 receives the first signal Sig1 having a negative polarity from the first sensor 12a, it determines that the front region ArFF has been deformed.
  • FIG. 13 is an upward view of the first sensor 12a included in the sensor module 1h.
  • the configuration of the sensor module 1h only the parts that are different from the configuration of the sensor module 1g will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1g will be omitted.
  • the first sensor 12a is in contact with the outer peripheral portion of the lower main surface DF11 when viewed in the thickness direction of the flexible base material 11.
  • the outer peripheral portion of the lower main surface DF11 is the front side, the rear side, the right side, or the left side of the lower main surface DF11.
  • the first sensor 12a is in contact with the front side and/or the right side of the lower main surface DF11, as shown in FIG.
  • the sensor module 1h has the same effect as the sensor module 1g and the sensor module 1b.
  • FIG. 14 is an upward view of the first sensor 12a and the second sensor 12b included in the sensor module 1i.
  • the configuration of the sensor module 1i only the parts that are different from the configuration of the sensor module 1h will be explained, and the explanation of the parts that are the same as the configuration of the sensor module 1h will be omitted.
  • the sensor module 1i further includes a second sensor 12b.
  • a diagonal line of the flexible base material 11 in a top view that is different from the first diagonal line TK1 is defined as a second diagonal line TK2.
  • the second diagonal line TK2 connects the right rear angle RBA formed by the right side and the rear side of the lower main surface DF11 and the left front angle LFA formed by the left side and the front side of the lower main surface DF11. I'm here.
  • the second sensor 12b overlaps the second diagonal line TK2 when viewed in the thickness direction of the flexible base material 11.
  • the second sensor 12b is arranged so that the second orientation direction ODb is parallel to the second diagonal line TK2, as shown in FIG.
  • the center of gravity G12b of the second sensor 12b is located behind the center of gravity G11 of the flexible base material 11.
  • the distance from the center of gravity G12b of the second sensor 12b to the right rear angle RBA is the distance from the center of gravity G11 of the flexible base material 11 to the right rear angle RBA. shorter.
  • the area located before the first diagonal line TK1 and before the second diagonal line TK2 is defined as a front area ArF1.
  • the area located before the first diagonal line TK1 and after the second diagonal line TK2 is defined as a left area ArL1.
  • the area located after the first diagonal line TK1 and before the second diagonal line TK2 is defined as a right area ArR1.
  • the area located after the first diagonal line TK1 and after the second diagonal line TK2 is defined as a rear area ArB1.
  • the front region ArF1 is surrounded by the first diagonal line TK1, the second diagonal line TK2, and the front side of the lower main surface DF11.
  • the left area ArL1 is surrounded by the first diagonal line TK1, the second diagonal line TK2, and the left side of the lower main surface DF11.
  • the right region ArR1 is surrounded by the first diagonal line TK1, the second diagonal line TK2, and the right side of the lower principal surface DF11.
  • the rear region ArB1 is surrounded by the first diagonal line TK1, the second diagonal line TK2, and the rear side of the lower main surface DF11.
  • a second straight line SL2 extending in a direction parallel to the second orientation direction ODb is located at the center of gravity G12b of the second sensor 12b.
  • a second straight line SL2 passing through is defined.
  • the front region ArF1, the left region ArL1, the right region ArR1, and the rear region ArB1 are located to the left of the first straight line SL1 and to the left of the second straight line SL2.
  • the polarity with respect to the reference potential of the first signal Sig1 output from the first sensor 12a when the front area ArF1 or the left area ArL1 is pushed downward is such that the polarity of the first signal Sig1 output from the first sensor 12a when the front area ArF1 or the left area ArL1 is pushed downward is
  • the polarity with respect to the reference potential of the first signal Sig1 output from the first sensor 12a when the button is pressed is different from that of the first signal Sig1.
  • the arithmetic circuit 13 determines whether the front area ArF1 or the left area ArL1 is pressed, or whether the rear area ArB1 or the right area ArR1 is pressed.
  • the polarity of the second signal Sig2 output from the second sensor 12b with respect to the reference potential when the front area ArF1 or the right area ArR1 is pushed downward is different from the polarity with respect to the reference potential when the front area ArF1 or the left area ArL1 is pushed downward.
  • the polarity of the second signal Sig2 output from the second sensor 12b with respect to the reference potential is different.
  • the arithmetic circuit 13 determines whether the front area ArF1 or the right area ArR1 is pressed, or whether the left area ArL1 or the rear area ArB1 is pressed.
  • the sensor module 1i can specify which region of the four regions on the flexible base material 11 has been pressed for the same reason as the sensor module 1e.
  • FIG. 15 is an upward view of the first sensor 12a, second sensor 12b, third sensor 12c, and fourth sensor 12d included in the sensor module 1j.
  • the configuration of the sensor module 1j only the parts that are different from the configuration of the sensor module 1i will be explained, and the explanation of the same parts as the configuration of the sensor module 1i will be omitted.
  • the sensor module 1j differs from the sensor module 1i in that it includes a third sensor 12c and a fourth sensor 12d.
  • the third sensor 12c is arranged so that the third orientation direction ODc is parallel to the first diagonal line TK1.
  • the third sensor 12c overlaps with the first diagonal line TK1 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12c of the third sensor 12c is located behind the center of gravity G11 of the flexible base material 11.
  • the distance from the center of gravity G12c of the third sensor 12c to the left rear corner LBA is shorter than the distance from the center of gravity G11 of the flexible base material 11 to the left rear corner LBA.
  • the polarity with respect to the reference potential of the third signal Sig3 output from the third sensor 12c when the front area ArF1 or the left area ArL1 is pushed downward is the same as the polarity with respect to the reference potential when the rear area ArB1 or the right area ArR1 is pushed downward.
  • the polarity of the third signal Sig3 output from the third sensor 12c is different from the reference potential.
  • the fourth sensor 12d is arranged so that the fourth orientation direction ODd is parallel to the second diagonal line TK2.
  • the fourth sensor 12d overlaps the second diagonal line TK2 when viewed in the thickness direction of the flexible base material 11.
  • the center of gravity G12d of the fourth sensor 12d is located behind the center of gravity G11 of the flexible base material 11.
  • the distance from the center of gravity G12d of the fourth sensor 12d to the left front angle LFA is shorter than the distance from the center of gravity G11 of the flexible base material 11 to the left front angle LFA.
  • the polarity with respect to the reference potential of the fourth signal Sig4 output from the fourth sensor 12d when the front area ArF1 or the right area ArR1 is pushed downward is the same as the polarity with respect to the reference potential when the rear area ArB1 or the left area ArL1 is pushed downward.
  • the polarity of the fourth signal Sig4 outputted from the fourth sensor 12d is different from that with respect to the reference potential.
  • a third straight line SL3 extending in a direction parallel to the third orientation direction ODc, when viewed in the thickness direction of the flexible base material 11, has a center of gravity G12c of the third sensor 12c.
  • a third straight line SL3 passing through is defined.
  • a fourth straight line SL4 extending in a direction parallel to the fourth orientation direction ODd and passing through the center of gravity G12d of the fourth sensor 12d is defined.
  • the front region ArF1, the left region ArL1, the right region ArR1, and the rear region ArB1 are located to the right of the third straight line SL3 and to the right of the fourth straight line SL4.
  • the arithmetic circuit 13 determines whether the front area ArF1 or the left area ArL1 has been pressed, or whether the rear area ArB1 or the right area ArR1 has been pressed, based on the first signal Sig1 and the third signal Sig3. Determine. Furthermore, the arithmetic circuit 13 determines whether the front area ArF1 or the right area ArR1 is pressed, or whether the left area ArL1 or the rear area ArB1 is pressed, based on the second signal Sig2 and the fourth signal Sig4. .
  • the sensor module 1j has the same effects as the sensor module 1i and the sensor module 1f.
  • the present invention is not limited to the sensor modules 1, 1 to 1i, and may be modified within the scope of the gist thereof. Furthermore, the configurations of the sensor modules 1, 1 to 1i may be combined arbitrarily.
  • the flexible base material 11 does not necessarily have to include an organic EL display and a circuit board.
  • the flexible base material 11 may include electronic components other than an organic EL display and a circuit board. , may be square.
  • the first sensor 12a does not necessarily need to include a charge amplifier (not shown) and an AD converter (not shown).
  • the electronic device EE may include a charge amplifier and an AD converter.
  • the arithmetic circuit 13 receives the first signal Sig1 after being converted by the charge amplifier and AD converter included in the electronic device EE.
  • the center of gravity G12a of the first sensor 12a does not necessarily correspond to the flexible base material 11.
  • the first center line CB1 may not overlap with the first center line CB1.
  • the center of gravity G12a of the first sensor 12a may be located after the center of gravity G11 of the flexible base material 11 when viewed in the thickness direction of the flexible base material 11.
  • the first sensor 12a may be in contact with the midpoint of the rear side of the lower principal surface DF11.
  • the second orientation direction ODb may coincide with the front direction.
  • the arithmetic circuit 13 does not invert the output of the second signal Sig2 with respect to the reference potential VF.
  • the sensor module 1d produces the same effect as when the second orientation direction ODb coincides with the rear direction.
  • the second orientation direction ODb may coincide with the front direction.
  • the front end of the first sensor 12a is in contact with the midpoint CP1 of the front side of the lower main surface DF11, and the right end of the second sensor 12b is in contact with the middle point CP1 of the front side of the flexible base material 11. It may be in contact with the midpoint CP3.
  • the sensor module 1e has the same effect as the sensor module 1b.
  • the front end of the first sensor 12a is in contact with the midpoint CP1 of the front side of the lower main surface DF11, and the right end of the second sensor 12b is in contact with the middle point CP1 of the front side of the flexible base material 11.
  • the rear end of the third sensor 12c is in contact with the midpoint CP3, and the rear end of the third sensor 12c is in contact with the midpoint of the rear side of the lower main surface DF11, and the left end of the fourth sensor 12d is in contact with the left side of the lower main surface DF11. It may touch the midpoint of In this case, the sensor module 1f has the same effect as the sensor module 1b.
  • the sensor module 1h is a second sensor 12b that overlaps the first diagonal line TK1 when viewed in the thickness direction of the flexible base material 11, and is arranged such that the second orientation direction ODb is parallel to the first diagonal line TK1.
  • the second sensor 12b may also be provided.
  • the center of gravity G12b of the second sensor 12b is located behind the center of gravity G11 of the flexible base material 11. In this case, when viewed in the thickness direction of the flexible base material 11, the distance from the center of gravity G12b of the second sensor 12b to the left rear corner LBA is the distance from the center of gravity G11 of the flexible base material 11 to the left rear corner LBA. shorter.
  • the polarity of the second signal Sig2 outputted from the second sensor 12b with respect to the reference potential VF when the front area ArFF is pushed downward is the same as when the rear area ArBB is pushed downward.
  • the polarity of the second signal Sig2 output from the second sensor 12b with respect to the reference potential VF is different.
  • the arithmetic circuit 13 determines whether the front area ArFF or the rear area ArBB has been pressed based on the first signal Sig1 and the second signal Sig2.
  • the first sensor 12a may be in contact with the front side of the lower main surface DF11 and the right side of the lower main surface DF11.
  • each of the first sensor 12a and the second sensor 12b is attached to the outer periphery of the lower main surface DF11 when viewed in the thickness direction of the flexible base material 11. It may be close to each other.
  • the first sensor 12a may be in contact with the right side and/or the front side of the lower main surface DF11
  • the second sensor 12b may be in contact with the left side and/or the rear side of the lower main surface DF11.
  • the sensor module 1h has the same effect as the sensor module 1d.
  • the first sensor 12a may be in contact with the rear side and/or the left side of the flexible base material 11.
  • each of the first sensor 12a and the second sensor 12b may be in contact with the outer peripheral portion of the lower main surface DF11 when viewed in the thickness direction of the flexible base material 11.
  • the first sensor 12a is in contact with the front side of the lower principal surface DF11 and/or the right side of the lower principal surface DF11
  • the second sensor 12b is in contact with the rear edge of the lower principal surface DF11 and/or the lower principal surface. It may be in contact with the right side of DF11.
  • Such a sensor module 1i has the same effect as the sensor module 1b.
  • each of the first sensor 12a, the second sensor 12b, the third sensor 12c, and the fourth sensor 12d is located at the outer periphery of the lower main surface DF11 when viewed in the thickness direction of the flexible base material 11. It may be in contact with
  • the first sensor 12a is in contact with the front side and/or the right side of the lower main surface DF11
  • the second sensor 12b is in contact with the rear side and/or the right side of the lower main surface DF11
  • the third sensor 12c is in contact with the lower main surface DF11.
  • the fourth sensor 12d may be in contact with the rear side and/or the left side of the main surface DF11, and the fourth sensor 12d may be in contact with the front side and/or the left side of the lower main surface DF11.
  • the sensor module 1j has the same effect as the sensor module 1h.
  • the present invention has the following structure.
  • a flexible base material having flexibility having flexibility, the flexible base material having an upper main surface and a lower main surface aligned in the thickness direction of the flexible base material;
  • the upper main surface and the lower main surface have a rectangular shape having a front side and a rear side extending in the left-right direction, and a left side and a right side extending in the front-back direction,
  • the first sensor has a first center line extending in the front-rear direction when viewed in the thickness direction, overlaps with the first center line passing through the midpoint of the front side, and has a first orientation direction. arranged parallel to the front-back direction; sensor module.
  • the first sensor is in contact with a midpoint of the front side or a midpoint of the rear side;
  • the sensor module according to (1).
  • the sensor module further includes an arithmetic circuit, When viewed in the thickness direction, the center of gravity of the first sensor is located before the center of gravity of the flexible base material or after the center of gravity of the flexible base material, A region located to the right of the center of gravity of the first sensor is defined as a right region, An area located to the left of the center of gravity of the first sensor is defined as a left area, The polarity with respect to the reference potential of the first signal output from the first sensor when the right area is pushed downward is the polarity of the first signal output from the first sensor when the left area is pushed downward. Unlike the polarity of the first signal with respect to the reference potential, The arithmetic circuit determines whether the right area or the left area is pressed based on the first signal.
  • the sensor module according to (1) or (2).
  • the sensor module is a second sensor including a second piezoelectric film that is uniaxially stretched and has piezoelectricity in which molecules are oriented in a second orientation direction, and is provided on the lower main surface, and further comprising the second sensor that outputs a second signal according to the deformation of the flexible base material,
  • the second sensor is arranged such that the second orientation direction is parallel to the front-rear direction, The second sensor overlaps the first center line when viewed in the thickness direction, When viewed in the thickness direction, the center of gravity of the first sensor is located in front of the center of gravity of the flexible base material, When viewed in the thickness direction, the center of gravity of the second sensor is located behind the center of gravity of the flexible base material.
  • the sensor module according to any one of (1) to (3).
  • the front end of the first sensor is in contact with the midpoint of the front side
  • the rear end of the second sensor is in contact with the midpoint of the rear side
  • the sensor module is a second sensor including a second piezoelectric film that is uniaxially stretched and has piezoelectricity in which molecules are oriented in a second orientation direction, and is provided on the lower main surface, and further comprising the second sensor that outputs a second signal according to the deformation of the flexible base material,
  • the second sensor has a second center line that extends in the left-right direction when viewed in the thickness direction, overlaps with the second center line that passes through the midpoint of the right side, and has a second orientation direction that extends in the left-right direction.
  • the center of gravity of the first sensor is located in front of the center of gravity of the flexible base material
  • the center of gravity of the second sensor is located to the right of the center of gravity of the flexible base material.
  • the front end of the first sensor is in contact with the midpoint of the front side
  • the right end of the second sensor is in contact with the midpoint of the right side
  • the sensor module further includes an arithmetic circuit, A region located to the right of the center of gravity of the first sensor is defined as a right region, An area located to the left of the center of gravity of the first sensor is defined as a left area, A region located in front of the center of gravity of the second sensor is defined as a front region, A region located behind the center of gravity of the second sensor is defined as a rear region, The polarity with respect to the reference potential of the first signal output from the first sensor when the right area is pushed downward is the polarity of the first signal output from the first sensor when the left area is pushed downward.
  • the polarity of the second signal output from the second sensor when the front area is pushed downward is the same as the polarity of the second signal output from the second sensor when the rear area is pushed downward.
  • the arithmetic circuit determines whether the right area or the left area is pressed based on the first signal, The arithmetic circuit determines whether the front area is pressed or the rear area is pressed based on the second signal.
  • the sensor module according to (6) or (7).
  • the sensor module includes: A third sensor including a third piezoelectric film having piezoelectricity that is uniaxially stretched so that molecules are oriented in a third orientation direction, the third sensor being provided on the lower main surface, and comprising a third piezoelectric film that is uniaxially stretched and has molecules oriented in a third orientation direction; the third sensor outputting a third signal according to the deformation of; A fourth sensor includes a fourth piezoelectric film having piezoelectricity that is uniaxially stretched and molecules are oriented in a fourth orientation direction, the fourth sensor is provided on the lower main surface, and is provided on the flexible base material.
  • the fourth sensor that outputs a fourth signal according to the deformation of; Furthermore, it is equipped with
  • the third sensor is arranged such that the third orientation direction is parallel to the front-rear direction, The third sensor overlaps the first center line when viewed in the thickness direction, When viewed in the thickness direction, the center of gravity of the third sensor is located behind the center of gravity of the flexible base material,
  • the fourth sensor is arranged such that the fourth orientation direction is parallel to the left-right direction, The fourth sensor overlaps the second center line when viewed in the thickness direction, When viewed in the thickness direction, the center of gravity of the fourth sensor is located to the left of the center of gravity of the flexible base material,
  • the polarity with respect to the reference potential of the third signal output from the third sensor when the right area is pushed downward is the same as the polarity of the third signal output from the third sensor when the left area is pushed downward.
  • the polarity of the fourth signal output from the fourth sensor when the front region is pushed downward is the same as the polarity of the fourth signal output from the fourth sensor when the rear region is pushed downward.
  • the arithmetic circuit determines whether the right area or the left area is pressed based on the first signal and the third signal, The arithmetic circuit determines whether the front area is pressed or the rear area is pressed based on the second signal and the fourth signal.
  • the sensor module according to (8).
  • the front end of the first sensor is in contact with the midpoint of the front side
  • the right end of the second sensor is in contact with the midpoint of the right side
  • the rear end of the third sensor is in contact with the midpoint of the rear side
  • the left end of the fourth sensor is in contact with the midpoint of the left side
  • a flexible base material having flexibility and having an upper main surface and a lower main surface aligned in the thickness direction of the flexible base material;
  • a first sensor including a first piezoelectric film having piezoelectricity that is uniaxially stretched so that molecules are oriented in a first orientation direction, the first sensor being provided on the lower main surface, and the first sensor comprising: the first sensor outputting a first signal according to the deformation of the first sensor; It is equipped with The upper main surface and the lower main surface have a rectangular shape having a front side and a rear side extending in the left-right direction, and a left side and a right side extending in the front-back direction, A diagonal line of the flexible base material in a top view is defined as a first diagonal line, The first sensor is arranged so that it overlaps the first diagonal line and the first orientation direction is parallel to the first diagonal line when viewed in the thickness direction. sensor module.
  • the first sensor is in contact with an outer peripheral portion of the lower main surface when viewed in the thickness direction.
  • the sensor module further includes an arithmetic circuit, A region located before the first diagonal line is defined as a front region, A region located after the first diagonal line is defined as a rear region, The polarity with respect to the reference potential of the first signal output from the first sensor when the front region is pushed downward is the polarity of the first signal output from the first sensor when the rear region is pushed downward. Unlike the polarity of the first signal with respect to the reference potential, The arithmetic circuit determines whether the front area is pressed or the rear area is pressed based on the first signal.
  • the sensor module according to (11) or (12).
  • the sensor module is a second sensor including a second piezoelectric film that is uniaxially stretched and has piezoelectricity in which molecules are oriented in a second orientation direction, and is provided on the lower main surface, and further comprising the second sensor that outputs a second signal according to the deformation of the flexible base material,
  • the second sensor is arranged so that it overlaps the first diagonal line and the second orientation direction is parallel to the first diagonal line when viewed in the thickness direction,
  • the center of gravity of the first sensor is located in front of the center of gravity of the flexible base material,
  • the center of gravity of the second sensor is located behind the center of gravity of the flexible base material.
  • the sensor module according to any one of (11) to (13).
  • Each of the first sensor and the second sensor is in contact with an outer peripheral portion of the lower main surface when viewed in the thickness direction,
  • the sensor module is a second sensor including a second piezoelectric film that is uniaxially stretched and has piezoelectricity in which molecules are oriented in a second orientation direction, and is provided on the lower main surface, and further comprising the second sensor that outputs a second signal according to the deformation of the flexible base material,
  • a diagonal line of the flexible base material in a top view that is different from the first diagonal line is defined as a second diagonal line
  • the second sensor is arranged so that it overlaps the second diagonal line and the second orientation direction is parallel to the second diagonal line when viewed in the thickness direction.
  • the sensor module according to any one of (11) to (13).
  • Each of the first sensor and the second sensor is in contact with an outer peripheral portion of the lower main surface when viewed in the thickness direction,
  • the sensor module further includes an arithmetic circuit,
  • the first diagonal line connects a right front corner formed by the right side and the front side and a left rear corner formed by the left side and the rear side
  • the second diagonal line connects a right rear corner formed by the right side and the rear side and a left front corner formed by the left side and the front side
  • a region located before the first diagonal line and before the second diagonal line is defined as a front region
  • An area located before the first diagonal line and after the second diagonal line is defined as a left area
  • a region located after the first diagonal line and before the second diagonal line is defined as a right region
  • a region located after the first diagonal line and after the second diagonal line is defined as a rear region
  • the polarity with respect to the reference potential of the first signal output from the first sensor when the front area or the left area is pushed downward is the same as the polarity with respect to the reference potential when the back area or the right area is pushed downward.
  • the polarity of the first signal output from the first sensor with respect to the reference potential is different,
  • the polarity of the second signal outputted from the second sensor with respect to the reference potential when the front area or the right area is pushed downward is the same as the polarity with respect to the reference potential when the front area or the left area is pushed downward.
  • the polarity of the second signal output from the second sensor with respect to the reference potential is different,
  • the arithmetic circuit is Based on the first signal, determine whether the front area or the left area, or the rear area or the right area is pressed, determining whether the front area or the right area, or the left area or the rear area is pressed, based on the second signal;
  • the sensor module according to (16) or (17).
  • the sensor module includes: A third sensor including a third piezoelectric film having piezoelectricity that is uniaxially stretched so that molecules are oriented in a third orientation direction, the third sensor being provided on the lower main surface, and comprising a third piezoelectric film that is uniaxially stretched and has molecules oriented in a third orientation direction; the third sensor outputting a third signal according to the deformation of; A fourth sensor includes a fourth piezoelectric film having piezoelectricity that is uniaxially stretched and molecules are oriented in a fourth orientation direction, the fourth sensor is provided on the lower main surface, and is provided on the flexible base material.
  • the fourth sensor that outputs a fourth signal according to the deformation of; Furthermore, it is equipped with The third sensor is arranged so that it overlaps the first diagonal line and the third orientation direction is parallel to the first diagonal line when viewed in the thickness direction, The fourth sensor is arranged so that it overlaps the second diagonal line and the fourth orientation direction is parallel to the second diagonal line when viewed in the thickness direction,
  • the center of gravity of the first sensor is located in front of the center of gravity of the flexible base material
  • the center of gravity of the second sensor is located behind the center of gravity of the flexible base material
  • the center of gravity of the third sensor is located behind the center of gravity of the flexible base material
  • the center of gravity of the fourth sensor is located in front of the center of gravity of the flexible base material,
  • the polarity with respect to the reference potential of the third signal output from the third sensor when the front area or the left area is pushed downward is the same as the polarity with respect to the reference potential when the front area or the right area is pushed downward.
  • the polarity of the third signal output from the third sensor with respect to the reference potential is different,
  • the polarity with respect to the reference potential of the fourth signal output from the fourth sensor when the front area or the right area is pushed downward is the polarity of the fourth signal output from the fourth sensor when the front area or the right area is pushed downward.
  • the polarity of the fourth signal output from the fourth sensor with respect to the reference potential is different,
  • the arithmetic circuit is Determining whether the front area or the left area, or the rear area or the right area is pressed, based on the first signal and the third signal, determining whether the front area or the right area, or the left area or the rear area is pressed, based on the second signal and the fourth signal;
  • the sensor module according to (18).
  • the first sensor, the second sensor, the third sensor, and the fourth sensor are each in contact with an outer peripheral portion of the lower main surface when viewed in the thickness direction,
  • Sensor module 11 Flexible base material 12a: First sensor 121a: First piezoelectric film ODa: First orientation direction Sig1: First signal CB1: First center line TK1: First diagonal line UF11: Upper principal surface DF11: Lower principal surface CP1: Midpoint

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

Le module de capteur d'après la présente invention contient un matériau de base flexible qui a une surface principale supérieure et une surface principale inférieure agencées dans le sens de l'épaisseur du matériau de base flexible, ainsi qu'un premier capteur. Ce dernier contient un premier film piézoélectrique étiré de manière uniaxiale et comportant des molécules orientées dans une première direction d'orientation. Le premier capteur est disposé sur la surface principale inférieure et émet un premier signal correspondant à une déformation du matériau de base flexible. La surface principale supérieure et la surface principale inférieure ont chacune une forme rectangulaire comportant un bord avant et un bord arrière s'étendant dans une direction gauche-droite, ainsi qu'un bord gauche et un bord droit s'étendant dans une direction avant-arrière. Le premier capteur est disposé de façon à chevaucher une première ligne centrale qui s'étend dans la direction avant-arrière et passe par un point central du bord avant, tel que vu dans le sens de l'épaisseur, et de telle sorte qu'une première direction d'orientation est parallèle à la direction avant-arrière.
PCT/JP2023/025326 2022-07-20 2023-07-07 Module de capteur WO2024018932A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022115493 2022-07-20
JP2022-115493 2022-07-20

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WO2024018932A1 true WO2024018932A1 (fr) 2024-01-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012137897A1 (fr) * 2011-04-08 2012-10-11 株式会社村田製作所 Capteur de déplacement, appareil de détection de déplacement et dispositif d'actionnement
WO2017183678A1 (fr) * 2016-04-22 2017-10-26 株式会社村田製作所 Système de surveillance
JP2018060308A (ja) * 2016-10-04 2018-04-12 株式会社村田製作所 押圧力検知センサおよび電子機器
CN213122750U (zh) * 2020-05-25 2021-05-04 华为技术有限公司 一种触控板模组及终端设备
JP2021197167A (ja) * 2020-06-09 2021-12-27 株式会社村田製作所 電子機器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012137897A1 (fr) * 2011-04-08 2012-10-11 株式会社村田製作所 Capteur de déplacement, appareil de détection de déplacement et dispositif d'actionnement
WO2017183678A1 (fr) * 2016-04-22 2017-10-26 株式会社村田製作所 Système de surveillance
JP2018060308A (ja) * 2016-10-04 2018-04-12 株式会社村田製作所 押圧力検知センサおよび電子機器
CN213122750U (zh) * 2020-05-25 2021-05-04 华为技术有限公司 一种触控板模组及终端设备
JP2021197167A (ja) * 2020-06-09 2021-12-27 株式会社村田製作所 電子機器

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