Sensor unit, haptic cueing device, and electronic device

Abstract

The sensor unit includes: a plate-shaped member having a first upper main surface and a first lower main surface; and a first sensor fixed to the first lower main surface and detecting deformation of the plate-shaped member. The first upper main surface has a first operation region and a non-operation region. At least a portion of the first sensor is provided in a region overlapping the first operation region when viewed in the up-down direction. The non-operation region is less likely to deform than the first operation region.

Description

Technical Field

[0001] This invention relates to sensor units, tactile cues, and electronic devices. Background Technology

[0002] As an invention related to conventional electronic devices equipped with sensor units, a notebook PC as described in Patent Document 1 is known, for example. The notebook PC described in Patent Document 1 has a main body side casing. A tablet keyboard is provided in the main body side casing as an input device. In the tablet keyboard, images of multiple key positions indicating the acceptance of input such as text or commands are displayed on a panel equipped with touch sensors. The tablet keyboard includes touch sensors that detect physical quantities indicating the pressing state of a user's fingers or other objects on the tablet keyboard.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 6840805 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] In the notebook PC described in Patent Document 1, there is a concern that the touch sensor detects a press when the user presses a non-operational area other than the tablet keyboard (operational area) on the main body side shell. There is also a concern that if this situation is attempted to be avoided, the user will not be able to place their palm on the non-operational area of ​​the main body side shell when pressing the tablet keyboard with their fingers, leading to fatigue.

[0008] Therefore, the object of the present invention is to provide a sensor unit, a tactile prompting device, and an electronic device capable of suppressing the detection of pressure on non-operating areas by the sensor.

[0009] Solution for solving the problem

[0010] A sensor unit according to one aspect of the present invention comprises:

[0011] A plate-like member having a first upper principal surface and a first lower principal surface; and

[0012] The first sensor, which is fixed to the first lower main surface, detects the deformation of the plate-shaped member.

[0013] The first upper main surface has:

[0014] The first operating area; and

[0015] Non-operational area

[0016] At least a portion of the first sensor is located in the area that overlaps with the first operating area when viewed in the vertical direction.

[0017] The non-operating area is less prone to deformation compared to the first operating area.

[0018] The effects of the invention

[0019] According to the present invention, it is possible to suppress the situation where the sensor detects pressure on non-operating areas. Attached Figure Description

[0020] Figure 1 This is a 3D view of electronic device 100.

[0021] Figure 2 This is a floor plan of electronic device 100.

[0022] Figure 3 yes Figure 2 AA section view in the image.

[0023] Figure 4 yes Figure 2 BB section view in the middle.

[0024] Figure 5 This is an exploded perspective view of the first sensor 3a in the first embodiment.

[0025] Figure 6 This is a plan view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the first embodiment when the user presses them.

[0026] Figure 7 This is a cross-sectional view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the first embodiment when the user presses them.

[0027] Figure 8 This is a cross-sectional view of electronic device 100a.

[0028] Figure 9 This is a 3D view of electronic device 100b.

[0029] Figure 10 This is a plan view of electronic device 100b.

[0030] Figure 11 This is an exploded perspective view of the first sensor 3a in the second embodiment.

[0031] Figure 12 This is a block diagram of sensor unit 1b.

[0032] Figure 13 This is a plan view of electronic device 100b.

[0033] Figure 14 This is a flowchart of how sensor unit 1b infers the first pressing position PP1 and the magnitude of the first pressing force F1 through the first sensor 3a in the second embodiment.

[0034] Figure 15 This is a plan view of electronic device 100b.

[0035] Figure 16 This is a plan view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the second embodiment.

[0036] Figure 17 This is a cross-sectional view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the second embodiment.

[0037] Figure 18 This is a 3D view of the electronic device 100c.

[0038] Figure 19 This is a plan view of electronic device 100c.

[0039] Figure 20 yes Figure 19 CC section view in the image.

[0040] Figure 21 yes Figure 19 DD section view in the image.

[0041] Figure 22 This is an exploded perspective view of the second sensor 3b in the third embodiment.

[0042] Figure 23 This is a cross-sectional view of electronic device 100d.

[0043] Figure 24 This is a 3D diagram of electronic device 100e.

[0044] Figure 25 This is a plan view of electronic device 100e.

[0045] Figure 26 This is an exploded perspective view of the second sensor 3b in the fourth embodiment.

[0046] Figure 27 This is a block diagram of sensor unit 1e.

[0047] Figure 28 This is a cross-sectional view of electronic device 100f.

[0048] Figure 29 This is a cross-sectional view of an electronic device weighing 100g.

[0049] Figure 30This is a cross-sectional view of electronic device 100h.

[0050] Figure 31 This is a cross-sectional view of the electronic device 100i.

[0051] Figure 32 This is a cross-sectional view of electronic device 100j.

[0052] Figure 33 This is a cross-sectional view of the first operating area A1 of the plate-shaped member 2 in the sixth embodiment when the user presses it.

[0053] Figure 34 This is a cross-sectional view of an electronic device 100k.

[0054] Figure 35 This is a 3D view of electronic device 100L.

[0055] Figure 36 This is a plan view of thin film 11.

[0056] Figure 37 This is a planar view of thin film 12.

[0057] Figure 38 This is a planar schematic diagram of the conductive object M1 pressing the electronic device 100l.

[0058] Figure 39 This is a planar schematic diagram of the conductive object M2 pressing the electronic device 100l.

[0059] Figure 40 This is a flowchart for determining whether to output the first pressing position PP1 and the magnitude F1 of the first pressing force inferred by the sensor unit 1l. Detailed Implementation

[0060] [First Embodiment]

[0061] Hereinafter, the structure of the electronic device 100 according to the first embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 This is a 3D view of electronic device 100. Figure 2 This is a floor plan of electronic device 100. Figure 3 yes Figure 2 AA section view in the image. Figure 4 yes Figure 2 BB section view in the middle. Figure 5 This is an exploded stereoscopic view of the first sensor 3a. Figure 6 This is a plan view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the first embodiment when the user presses them. Figure 7 This is a cross-sectional view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the first embodiment when the user presses them.

[0062] In this specification, direction is defined as follows. Figure 1 As shown, the direction of the long side of the first upper main face US2 is defined as the left-right direction. The direction of the short side of the first upper main face US2 is defined as the front-back direction. Figure 5 As shown, the orientation of the first electrode 3a2 and the piezoelectric film 3a1 is defined as the up-down direction. The left-right, front-back, and up-down directions are orthogonal to each other. However, the left-right, front-back, and up-down directions in this specification are defined for ease of explanation and may not be consistent with the left-right, front-back, and up-down directions used in the sensor unit 1 or electronic device 100. In addition, in the various figures, the left and right directions, the front and back directions, and the up and down directions can be interchanged.

[0063] Electronic device 100 is a tablet computer. Furthermore, electronic device 100 is an example of the electronic device of the present invention. For example... Figure 1 As shown, the electronic device 100 includes a sensor unit 1 and a housing 4a.

[0064] The housing 4a has a cuboid shape. However, the upper surface of the housing 4a is open. Thus, the housing 4a includes a bottom 4a1 and a support portion 4a2.

[0065] The bottom 4a1 has a cuboid shape. In this embodiment, the bottom 4a1 is plate-shaped. The support portion 4a2 is located on the upper surface of the bottom 4a1. The support portion 4a2 is supported by the bottom 4a1. The support portion 4a2 has a frame shape. In this embodiment, when viewed in the vertical direction, the inner and outer edges of the support portion 4a2 each have a rectangular shape. Therefore, when viewed in the downward direction, the opening OP1 of the housing 4a has a rectangular shape. In this embodiment, the outer edge of the support portion 4a2 viewed in the vertical direction coincides with the outer edge of the bottom 4a1 viewed in the vertical direction. In addition, the inner edge of the support portion 4a2 viewed in the vertical direction is surrounded by the outer edge of the bottom 4a1 viewed in the vertical direction. Furthermore, the bottom 4a1 may not be plate-shaped. In addition, when viewed in the vertical direction, the inner and outer edges of the support portion 4a2 may not each have a rectangular shape. Therefore, when viewed in the downward direction, the opening OP1 may not have a rectangular shape. Alternatively, the outer edge of the support portion 4a2, as viewed in the vertical direction, may not coincide with the outer edge of the bottom portion 4a1, as viewed in the vertical direction. The shape and configuration of the housing 4a are not limited to those shown in this embodiment.

[0066] Sensor unit 1 is flexible. For example... Figure 3 As shown, sensor unit 1 includes plate-shaped member 2 and first sensor 3a. Plate-shaped member 2 and first sensor 3a are arranged in the order described above along the downward direction.

[0067] like Figure 2 As shown, the plate-shaped member 2 has a first upper main surface US2 and a first lower main surface DS2, which are arranged in the order described above along the downward direction. When viewed in the vertical direction, the plate-shaped member 2 has a rectangular shape, which has two long sides extending in the left-right direction and two short sides extending in the front-back direction. In this embodiment, the outer edge of the plate-shaped member 2 viewed in the vertical direction coincides with the outer edge of the support portion 4a2 viewed in the vertical direction. The area near the outer edge of the first lower main surface DS2 is supported on the upper surface of the support portion 4a2 by an adhesive such as double-sided tape, thermosetting adhesive, thermoplastic adhesive, or UV (UltraViolet) curing adhesive. Alternatively, when viewed in the vertical direction, the plate-shaped member 2 may not have a rectangular shape. Furthermore, the outer edge of the plate-shaped member 2 viewed in the vertical direction may not coincide with the outer edge of the support portion 4a2 viewed in the vertical direction. The shape and arrangement of the plate-shaped member 2 are not limited to the shape and arrangement shown in this embodiment.

[0068] In this embodiment, the plate-shaped member 2 is a surface panel such as a touch panel. Since the structure of a touch panel is general, its description is omitted. The user presses the first upper main surface US2 using a pen, their own finger, or the like. That is, the first upper main surface US2 is the operating surface that receives the user's press operation. More specifically, the first upper main surface US2 has a first operating area A1 and a non-operating area A2. The user presses the first operating area A1 using a pen, their own finger, or the like. Furthermore, the plate-shaped member 2 is not limited to a touch panel; it can also be a transparent plate, a protective sheet, or the like. Additionally, the plate-shaped member 2 can also be a display such as a liquid crystal display (LCD) or an organic EL display. Furthermore, the shape and arrangement of the first operating area A1 and the non-operating area A2 are not limited to the shapes and arrangements shown in this embodiment.

[0069] like Figure 3 as well as Figure 4 As shown, the support portion 4a2 is not located below the first operating area A1, but the opening OP1 is located below the first operating area A1. In other words, the housing 4a has an opening OP1 in the area that overlaps with the first operating area A1 when viewed in the vertical direction. Therefore, in the area overlapping with the first operating area A1 when viewed in the vertical direction, the plate-shaped member 2 can deform downwards. Furthermore, the first sensor 3a is located below the first operating area A1. That is, the first sensor 3a is located within the opening OP1 when viewed in the vertical direction. Additionally, the bottom 4a1 is located below the first sensor 3a.

[0070] The opening OP1 is not located below the non-operating area A2, and the support portion 4a2 is located below the non-operating area A2. In other words, the support portion 4a2 supports the first lower main surface DS2 in the area that overlaps with the non-operating area A2 when viewed in the vertical direction. Therefore, even in the area that overlaps with the non-operating area A2 when viewed in the vertical direction, if the plate member 2 attempts to deform downwards, the support portion 4a2 will suppress the deformation of the plate member 2. Thus, in the area that overlaps with the non-operating area A2 when viewed in the vertical direction, the plate member 2 is less likely to deform downwards. That is, the non-operating area A2 is less likely to deform than the first operating area A1.

[0071] The first sensor 3a is a thin film and is flexible. The first sensor 3a detects the deformation of the plate-shaped member 2. More specifically, the first sensor 3a has an upper main surface US3a and a lower main surface DS3a, which are arranged in the order described above along the downward direction. When viewed in the vertical direction, the first sensor 3a has a rectangular shape, with two long sides extending in the left-right direction and two short sides extending in the front-back direction. In this embodiment, the outer edge of the first sensor 3a, viewed in the vertical direction, is surrounded by the outer edge of the plate-shaped member 2, also viewed in the vertical direction. In this embodiment, the first sensor 3a is disposed on the first lower main surface DS2. More specifically, the first sensor 3a is fixed to the first lower main surface DS2 by an adhesive such as double-sided tape, thermosetting adhesive, thermoplastic adhesive, or UV (Ultra Violet) curing adhesive. Furthermore, the upper main surface US3a corresponds to the fourth upper main surface of the present invention. Furthermore, the lower main surface DS3a corresponds to the fourth lower main surface of the present invention.

[0072] In this embodiment, the first sensor 3a does not contact the housing 4a. More specifically, the outer edge of the first sensor 3a, viewed in the vertical direction, is surrounded by the inner edge of the support portion 4a2, viewed in the vertical direction. In this embodiment, the first sensor 3a is located in the region that overlaps with the first operating area A1 when viewed in the vertical direction, and is not located in the region that overlaps with the non-operating area A2 when viewed in the vertical direction. Therefore, the entire first sensor 3a is provided in the region that overlaps with the first operating area A1 when viewed in the vertical direction. As a result, the first sensor 3a can deform in a direction orthogonal to the vertical direction. In addition, a space is provided below the first sensor 3a. Therefore, the first sensor 3a can also deform in the downward direction. Figure 5As shown, the first sensor 3a includes a piezoelectric thin film 3a1, a first electrode 3a2, and a second electrode 3a3. That is, in this embodiment, the first sensor 3a is a piezoelectric sensor. The first electrode 3a2, the piezoelectric thin film 3a1, and the second electrode 3a3 are arranged in the above order along the downward direction. Furthermore, the first sensor 3a is not limited to a piezoelectric sensor and may also be a strain gauge. In addition, the configuration of the piezoelectric thin film 3a1, the first electrode 3a2, and the second electrode 3a3 is not limited to the configuration shown in this embodiment.

[0073] The piezoelectric film 3a1 is flexible. The piezoelectric film 3a1 has a second upper main surface US3a1 and a second lower main surface DS3a1, which are arranged in the order described above along the downward direction. When viewed in the vertical direction, the second upper main surface US3a1 and the second lower main surface DS3a1 each have a rectangular shape, with two long sides extending in the left-right direction and two short sides extending in the front-back direction. Furthermore, the shape of the piezoelectric film 3a1 is not limited to the shape shown in this embodiment.

[0074] The piezoelectric film 3a1 becomes polarized due to deformation, generating a potential difference between the second upper principal surface US3a1 and the second lower principal surface DS3a1. The potential difference generated between the second upper principal surface US3a1 and the second lower principal surface DS3a1 corresponds to the amount of deformation of the piezoelectric film 3a1.

[0075] The piezoelectric film 3a1 is, for example, a film formed from a chiral polymer. Examples of chiral polymers include polylactic acid (PLA) such as L-type polylactic acid (PLLA) and D-type polylactic acid (PDLA). The main chain of PLA has a helical structure. PLA acquires piezoelectricity by uniaxial stretching to orient the molecules. The piezoelectric film 3a1 has a piezoelectric constant d14.

[0076] PLA is stretched in a uniaxial stretching direction OD1. The uniaxial stretching direction OD1 of PLA forms an angle of 45 degrees with respect to both the left-right direction and the front-back direction. Furthermore, the 45 degrees only needs to be within the range of approximately 45 degrees ± 10 degrees. The piezoelectric film 3a1 is stretched or compressed along the left-right direction, thereby generating a potential difference between the second upper principal surface US3a1 and the second lower principal surface DS3a1. Similarly, the piezoelectric film 3a1 is stretched or compressed along the front-back direction, thereby generating a potential difference between the second upper principal surface US3a1 and the second lower principal surface DS3a1. In this embodiment, the magnitude of the potential difference generated between the second upper principal surface US3a1 and the second lower principal surface DS3a1 is proportional to the differential value of the deformation of the piezoelectric film 3a1.

[0077] The first electrode 3a2 is flexible and conductive. The material of the first electrode 3a2 is, for example, copper. The first electrode 3a2 has an upper main surface and a lower main surface, which are arranged in the order described above along the downward direction. When viewed in the vertical direction, the upper and lower main surfaces each have a rectangular shape, with two long sides extending in the left-right direction and two short sides extending in the front-back direction. The first electrode 3a2 is disposed on the second upper main surface US3a1 of the piezoelectric film 3a1. In this embodiment, the first electrode 3a2 covers the second upper main surface US3a1. Therefore, the upper main surface of the first electrode 3a2 coincides with the upper main surface US3a. The first electrode 3a2 functions as a signal electrode for outputting the potential difference generated by the piezoelectric film 3a1 as a charge. In this embodiment, the upper main surface of the first electrode 3a2 is disposed on the first lower main surface DS2. Furthermore, the shape of the first electrode 3a2 is not limited to the shape shown in this embodiment.

[0078] The second electrode 3a3 is flexible and conductive. The material of the second electrode 3a3 is, for example, copper. The second electrode 3a3 is in the form of a thin film. The second electrode 3a3 has an upper main surface and a lower main surface, which are arranged in the order described above along the downward direction. When viewed in the vertical direction, the upper and lower main surfaces of the second electrode 3a3 each have a rectangular shape, with two long sides extending in the left-right direction and two short sides extending in the front-back direction. The second electrode 3a3 is disposed on the second lower main surface DS3a1. In this embodiment, the second electrode 3a3 covers the second lower main surface DS3a1. Therefore, the lower main surface of the second electrode 3a3 coincides with the lower main surface DS3a1. The second electrode 3a3 functions as a reference electrode and a shielding conductor by being connected to a ground potential. Furthermore, the shape of the second electrode 3a3 is not limited to the shape shown in this embodiment.

[0079] Alternatively, the second electrode 3a3 may be disposed on the second upper main surface US3a1, and the first electrode 3a2 may be disposed on the second lower main surface DS3a1.

[0080] According to sensor unit 1, it is possible to suppress the first sensor 3a from detecting pressure on the non-operating area A2. More specifically, the first sensor 3a is provided in the area that overlaps with the first operating area A1 when viewed in the vertical direction. In addition, the non-operating area A2 is less prone to deformation than the first operating area A1. Therefore, when the first operating area A1 is pressed, both the first operating area A1 and the first sensor 3a deform, thereby enabling the first sensor 3a to detect the deformation of the plate-shaped member 2. On the other hand, when the non-operating area A2 is pressed, the non-operating area A2 is less prone to deformation, thereby making it less likely for the first sensor 3a to deform and detect pressure on the non-operating area A2. As a result, according to sensor unit 1, it is possible to suppress the first sensor 3a from detecting pressure on the non-operating area A2. Thus, when pressing the first operating area A1, the user can place their palm on the non-operating area A2 and press the first operating area A1 without feeling fatigued.

[0081] Furthermore, according to sensor unit 1, the first sensor 3a can immediately detect pressure applied to the first operating area A1. More specifically, the piezoelectric element exhibits excellent responsiveness. Consequently, the piezoelectric film 3a1 deforms to immediately generate a potential difference between the second upper main surface US3a1 and the second lower main surface DS3a1. As a result, according to sensor unit 1, the first sensor 3a can immediately detect pressure applied to the first operating area A1.

[0082] Alternatively, the plate-shaped member 2 can also be a display, depending on the sensor unit 1. Thus, the user can perform operations such as activating an application by pressing the first upper main surface US2 with a pen or finger on an object displayed on the display.

[0083] Furthermore, according to the electronic device 100, the possibility of the first sensor 3a detecting pressure on the non-operating area A2 can be further suppressed. More specifically, the housing 4a supports the first lower main surface DS2 in the area overlapping with the non-operating area A2 when viewed in the vertical direction. This makes the non-operating area A2 less prone to deformation compared to the first operating area A1. Consequently, when the non-operating area A2 is pressed, the first sensor 3a is less prone to deformation, and the first sensor 3a is less likely to detect pressure on the non-operating area A2. As a result, according to the electronic device 100, the possibility of the first sensor 3a detecting pressure on the non-operating area A2 can be further suppressed.

[0084] Furthermore, according to the electronic device 100, the first sensor 3a can more reliably detect pressure applied to the first operating area A1. More specifically, a space is provided below the first sensor 3a in the area overlapping the first operating area A1 when viewed in the vertical direction. Therefore, when the first operating area A1 is pressed, the first sensor 3a can deform more reliably, and the first sensor 3a can more reliably detect the deformation of the plate-shaped member 2.

[0085] Furthermore, in this embodiment, an example is shown where the support portion 4a2 supports the first lower main surface DS2 in the region overlapping with the non-operating region A2 when viewed in the vertical direction. Therefore, in the region overlapping with the non-operating region A2 when viewed in the vertical direction, the plate-like member 2 is less prone to downward deformation, but this is not limited to this example. For instance, the elastic modulus of the plate-like member 2 may vary depending on its location. Specifically, it may be possible to make the elastic modulus of the non-operating region A2 larger than that of the first operating region A1, thereby reducing deformation.

[0086] [Example 1]

[0087] Hereinafter, the sensor unit 1a and electronic device 100a of the first modified embodiment of the present invention will be described with reference to the accompanying drawings. Figure 8 This is a cross-sectional view of electronic device 100a. Furthermore, regarding sensor unit 1a and electronic device 100a, only the parts that differ from sensor unit 1 and electronic device 100 will be described, and will be omitted thereafter.

[0088] The length of the first sensor 3a in the left-right direction in sensor unit 1a is longer than the length of the first sensor 3a in the left-right direction in sensor unit 1. As a result, in this modified example, the first sensor 3a is in contact with the housing 4a. More specifically, as Figure 8As shown, the outer edge of the first sensor 3a, viewed vertically, coincides with the outer edge of the support portion 4a2, also viewed vertically. The lower main surface DS3a is supported on the upper surface of the support portion 4a2 near its outer edge by an adhesive such as double-sided tape, thermosetting adhesive, thermoplastic adhesive, or UV (Ultra Violet) curing adhesive. In other words, the support portion 4a2 supports the lower main surface DS3a of the first sensor 3a in the region that overlaps with the non-operating region A2 when viewed vertically. That is, in this modified example, the first sensor 3a is located in both the region that overlaps with the first operating region A1 when viewed vertically and the region that overlaps with the non-operating region A2 when viewed vertically. Therefore, at least a portion of the first sensor 3a is provided in the region that overlaps with the first operating region A1 when viewed vertically. Consequently, a space is provided below the first sensor 3a in the region that overlaps with the first operating region A1 when viewed vertically. Alternatively, the outer edge of the first sensor 3a observed in the vertical direction may not coincide with the outer edge of the support portion 4a2 observed in the vertical direction.

[0089] Even in the area that overlaps with the non-operating area A2 when viewed in the vertical direction, the support portion 4a2 suppresses the deformation of the first sensor 3a when it attempts to deform downwards. Therefore, in the area that overlaps with the non-operating area A2 when viewed in the vertical direction, the first sensor 3a is less likely to deform downwards.

[0090] However, in the region that overlaps with the first operating region A1 when viewed in the vertical direction, there is a space below the first sensor 3a. Therefore, in the region that overlaps with the first operating region A1 when viewed in the vertical direction, the first sensor 3a can deform in the downward direction.

[0091] In sensor unit 1a, it has the same effect as sensor unit 1, and in electronic device 100a, it has the same effect as electronic device 100. Furthermore, the length of the first sensor 3a in the front-rear direction in sensor unit 1a may be longer than the length of the first sensor 3a in the front-rear direction in sensor unit 1. That is, the outer edge of the first sensor 3a observed in the vertical direction may not be surrounded by the outer edge of the plate-shaped member 2 observed in the vertical direction, or it may be aligned with the outer edge of the plate-shaped member 2 observed in the vertical direction.

[0092] [Second Embodiment]

[0093] Hereinafter, the sensor unit 1b and electronic device 100b of the second embodiment of the present invention will be described with reference to the accompanying drawings. Figure 9 This is a 3D view of electronic device 100b. Figure 10 This is a plan view of electronic device 100b. Figure 11This is an exploded perspective view of the first sensor 3a in the second embodiment. Figure 12 This is a block diagram of sensor unit 1b. Figure 13 This is a plan view of electronic device 100b. Figure 14 This is a flowchart of how sensor unit 1b infers the first pressing position PP1 and the magnitude of the first pressing force F1 through the first sensor 3a in the second embodiment. Figure 15 This is a plan view of electronic device 100b. Figure 16 This is a plan view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the second embodiment. Figure 17 This is a cross-sectional view of the first operating area A1 and the non-operating area A2 of the plate-shaped member 2 in the second embodiment when the user presses them. Furthermore, regarding the sensor unit 1b and the electronic device 100b, only the parts that differ from the sensor unit 1 and the electronic device 100 will be described, and will be omitted thereafter.

[0094] like Figure 9 As shown, electronic device 100b is a laptop computer. Furthermore, the electronic device of the present invention is not limited to tablet computers or laptop computers.

[0095] The electronic device 100b also includes a housing 4b, a display 5, and connecting parts 6a and 6b.

[0096] The housing 4b has a cuboid shape. The display 5 shows an image. The display 5 is located on the housing 4b. The connecting parts 6a and 6b are, for example, hinges. The housings 4a and 4b are connected together by the connecting parts 6a and 6b. More specifically, the connecting parts 6a and 6b support the housings 4a and 4b so that they can be opened and closed.

[0097] like Figure 10 As shown, a predetermined key or a key array is arranged in the first operating area A1. Alternatively, if the plate-shaped member 2 is a display, the predetermined key array may be displayed in the first operating area A1.

[0098] like Figure 11 As shown, in this embodiment, the first sensor 3a includes first electrodes 3a2a to 3a2d instead of the first electrode 3a2. Furthermore, since the structure of the first electrodes 3a2a to 3a2d is the same as that of the first electrode 3a2, its description is omitted.

[0099] In this embodiment, the first electrode 3a2a is located at the front left corner of the second upper main surface US3a1. The first electrode 3a2b is located at the rear left corner of the second upper main surface US3a1. The first electrode 3a2c is located at the front right corner of the second upper main surface US3a1. The first electrode 3a2d is located at the rear right corner of the second upper main surface US3a1. Furthermore, the shape and arrangement of the first electrodes 3a2a to 3a2d are not limited to those shown in this embodiment. For example, the second electrode 3a3 may be located on the second upper main surface US3a1, and the first electrodes 3a2a to 3a2d may be located on the second lower main surface DS3a1.

[0100] like Figure 12 As shown, the sensor unit 1b also includes charge amplifiers 3a4a to 3a4d, a computational circuit 35, and a memory 36. The charge amplifiers 3a4a to 3a4d, the computational circuit 35, and the memory 36 are located, for example, within the opening OP1.

[0101] Charge amplifiers 3a4a and 3a4d convert the charge output from the first electrode 3a2a into a voltage signal vaa, charge amplifier 3a4b converts the charge output from the first electrode 3a2b into a voltage signal vab, charge amplifier 3a4c converts the charge output from the first electrode 3a2c into a voltage signal vac, and charge amplifier 3a4d converts the charge output from the first electrode 3a2d into a voltage signal vad, and output the aforementioned voltage signals to the operational circuit 35. Furthermore, in this invention, charge amplifiers 3a4a to 3a4d are not essential components. Alternatively, the first electrodes 3a2a to 3a2d may directly output the potential difference generated by the piezoelectric film 3a1 as a charge to the operational circuit 35. Alternatively, the first electrodes 3a2a to 3a2d may simply output the potential difference generated by the piezoelectric film 3a1 as an electrical signal to the operational circuit 35.

[0102] The arithmetic circuit 35 reads a program from the memory 36 based on voltage signals vaa to vad, which is used to infer the first pressing position PP1 of the first upper main surface US2 being pressed and the magnitude F1 of the first pressing force applied to the first upper main surface US2. The memory 36 may contain, for example, ROM (Read Only Memory) and RAM (Random Access Memory). The arithmetic circuit 35 reads the program stored in the ROM into the RAM. Thus, the arithmetic circuit 35 performs the inference of the first pressing position PP1 and the magnitude F1 of the first pressing force based on the voltage signals vaa to vad. Such an arithmetic circuit 35 may be, for example, a CPU (Central Processing Unit).

[0103] The memory 36 is pre-input into the following parameters: the distance xa1 between the first electrode 3a2a and a predetermined point P of the piezoelectric film 3a1; the distance xb1 between the first electrode 3a2b and a predetermined point P of the piezoelectric film 3a1; the distance xc1 between the first electrode 3a2c and a predetermined point P of the piezoelectric film 3a1; the distance xd1 between the first electrode 3a2d and a predetermined point P of the piezoelectric film 3a1; the magnitude of the force F0; and the voltage values ​​Vaa1 to Vad1. The voltage values ​​Vaa1 to Vad1 are the values ​​of the voltage signals vaa to vad output by the charge amplifiers 3a4a to 3a4d to the operational circuit 35 when point P is pressed downwards with a force of magnitude F0. In addition to storing the above program, the memory 36 also stores the distances xa1 to xd1, the magnitude of the force F0, and the voltage values ​​Vaa1 to Vad1.

[0104] like Figure 13 As shown, in this embodiment, point P is the center O of the first sensor 3a. Distances xa1 to xd1 are each distance D and are equal to each other. However, point P is not limited to the center O of the first sensor 3a. Alternatively, distances xa1 to xd1 may also be unequal.

[0105] The following describes in detail the processing of inferring the first pressing position PP1 and the magnitude F1 of the first pressing force in the arithmetic circuit 35. This processing begins by acquiring voltage signals vaa to vad through the arithmetic circuit 35. Figure 14 Step S1).

[0106] Next, the arithmetic circuit 35 infers the first press position PP1 ( Figure 14 (Step S2). Specifically, when the piezoelectric film 3a1 is pressed with the same force, the longer the distance between the first electrode and the first pressing position PP1, the smaller the voltage signal. Therefore, it is considered that when the piezoelectric film 3a1 is pressed with the same force, the magnitude of the voltage signal is inversely proportional to the distance between the first electrode and the first pressing position PP1. In the first electrode 3a2a, when the distance between the first electrode 3a2a and the first pressing position PP1 is D, the voltage signal vaa is the voltage value Vaa1. Therefore, with regard to the distance xa between the first electrode 3a2a and the first pressing position PP1, the voltage signal vaa, the voltage value Vaa1, and the distance D are represented by the following equation 1.

[0107] [Formula 1]

[0108]

[0109] Similarly, regarding the distance xb between the first electrode 3a2b and the first pressing position PP1, the voltage signal vab, voltage value Vab1, and distance D are represented by the following equation 2; regarding the distance xc between the first electrode 3a2c and the first pressing position PP1, the voltage signal vac, voltage value Vac1, and distance D are represented by the following equation 3; and regarding the distance xd between the first electrode 3a2d and the first pressing position PP1, the voltage signal vad, voltage value Vad1, and distance D are represented by the following equation 4.

[0110] [Formula 2]

[0111]

[0112] [Formula 3]

[0113]

[0114] [Formula 4]

[0115]

[0116] Through equations 1 to 4, such as Figure 15 As shown, the distances xa to xd are calculated. Therefore, the arithmetic circuit 35 can infer the first pressing position PP1 based on the voltage signals vaa to vad.

[0117] Furthermore, the first sensor 3a in this embodiment is not limited to including four first electrodes; it can include multiple first electrodes. The more first electrodes the first sensor 3a includes, the more accurately it can infer the first pressing position PP1.

[0118] Furthermore, the method by which the arithmetic circuit 35 infers the first pressing position PP1 is not limited to the method shown in this embodiment. For example, a matrix corresponding to the distances xa to xd and the voltage signals vaa to vad may be pre-input into the memory 36. When the arithmetic circuit 35 acquires the voltage signals vaa to vad, the arithmetic circuit 35 extracts the distances xa to xd corresponding to the voltage signals vaa to vad from the matrix and infers the first pressing position PP1.

[0119] Next, the arithmetic circuit 35 infers the first press position PP1 ( Figure 14(Step S3). Specifically, when pressing the piezoelectric film 3a1, the greater the magnitude of the first pressing force F1, the greater the total value of the voltage signals vaa to vad. Therefore, it is considered that when pressing the piezoelectric film 3a1, the total value of the voltage signals vaa to vad is proportional to the magnitude of the first pressing force F1. When the magnitude of the force is F0, the total value of the voltage signals vaa to vad is Vaa1 + Vab1 + Vac1 + Vad1. Therefore, regarding the magnitude of the first pressing force F1, the voltage signals vaa to vad, the voltage values ​​Vaa1 to Vad1, and the magnitude of the force F0 are represented by the following equation 5.

[0120] [Formula 5]

[0121]

[0122] The magnitude of the first pressing force F1 is calculated using equation 5. Therefore, the operational circuit 35 can infer the first pressing position PP1 based on the voltage signals vaa to vad.

[0123] Furthermore, the method by which the arithmetic circuit 35 infers the magnitude F1 of the first pressing force is not limited to the method shown in this embodiment.

[0124] Next, the arithmetic circuit 35 outputs the inferred first pressing position PP1 and the magnitude of the first pressing force F1. Figure 14 Step S4).

[0125] In sensor unit 1b, the same effect as in sensor unit 1 is achieved. Furthermore, based on sensor unit 1b, the first pressing position PP1 of the first upper main surface US2 being pressed, and the magnitude F1 of the first pressing force applied to the first upper main surface US2, can be deduced. More specifically, the first sensor 3a includes a plurality of first electrodes disposed on the second upper main surface US3a1. When the first operating area A1 is pressed, the charge generated by the piezoelectric film 3a1 is distributed on the second upper main surface US3a1. In the piezoelectric film 3a1, the larger the deformation, the greater the amount of charge generated at that location. By including a plurality of first electrodes in the first sensor 3a, each of the plurality of first electrodes outputs a charge corresponding to the charge distribution on the second upper main surface US3a1. Therefore, the arithmetic circuit 35 deduces the first pressing position PP1 of the first upper main surface US2 being pressed, and the magnitude F1 of the first pressing force applied to the first upper main surface US2, based on the charges output by each of the plurality of first electrodes. As a result, based on sensor unit 1b, the first pressing position PP1 of the first upper main surface US2 being pressed, and the magnitude F1 of the first pressing force applied to the first upper main surface US2, can be inferred. Thus, the user can perform keyboard operation with their palm placed on the non-operation area A2.

[0126] Alternatively, in this embodiment, the arithmetic circuit 35 may not infer the magnitude F1 of the first pressing force, but only infer the first pressing position PP1. Alternatively, the arithmetic circuit 35 may not infer the first pressing position PP1, but only infer the magnitude F1 of the first pressing force.

[0127] Alternatively, the sensor unit 1b may not include the memory 36, and the arithmetic circuit 35 may infer the first pressing position PP1 and the magnitude of the first pressing force F1 based on the voltage signals vaa to vad. For example, the arithmetic circuit 35 may compare the magnitudes of the voltage signals vaa to vad to infer the first pressing position PP1. Alternatively, the arithmetic circuit 35 may calculate the sum of the voltage signals vaa to vad and infer the magnitude of the first pressing force F1 based on the sum of the voltage signals vaa to vad.

[0128] [Third Embodiment]

[0129] Hereinafter, the sensor unit 1c and electronic device 100c of the third embodiment of the present invention will be described with reference to the accompanying drawings. Figure 18 This is a 3D view of the electronic device 100c. Figure 19 This is a plan view of electronic device 100c. Figure 20 yes Figure 19 CC section view in the image. Figure 21 yes Figure 19 DD section view in the image. Figure 22 This is an exploded perspective view of the second sensor 3b in the third embodiment. Furthermore, regarding the sensor unit 1c and the electronic device 100c, only the parts that differ from the sensor unit 1 and the electronic device 100 will be described, and will be omitted thereafter.

[0130] The difference between electronic device 100c and electronic device 100 is that the housing 4a also has an opening OP2.

[0131] In this embodiment, when viewed vertically, the support portion 4a2 has a figure-eight shape as seen in a seven-segment display. The support portion 4a2 includes: a first support portion 4a21, which has a frame shape; and a second support portion 4a22, which is surrounded by the first support portion 4a21 when viewed vertically. The opening OP2 is located further back than the opening OP1. Furthermore, the opening OP2 is located at the center of the electronic device 100c in the left-right direction. Additionally, when viewed vertically, the opening OP2 has a rectangular shape. In this embodiment, the opening OP2 is smaller than the opening OP1. Alternatively, when viewed vertically, the support portion 4a2 may not have the figure-eight shape as seen in a seven-segment display. Furthermore, the shape and arrangement of the opening OP2 are not limited to those shown in this embodiment. The opening OP2 may also be the same size as or larger than the opening OP1. Furthermore, the second support portion 4a22 corresponds to the support portion of the present invention.

[0132] like Figure 18 As shown, the first upper main surface US2 also has a second operating area A3. The second operating area A3 is arranged spaced apart from the first operating area A1. Therefore, the non-operating area A2 includes a first non-operating area PA2 located between the first operating area A1 and the second operating area A3. In this embodiment, as... Figure 19 As shown, the second operation area A3 is located further back than the first operation area A1. Furthermore, the second operation area A3 is located at the center of the first upper main surface US2 in the left-right direction. The user can press the first operation area A1 using a pen or finger, and can also press the second operation area A3. Moreover, the shape and arrangement of the second operation area A3 are not limited to those shown in this embodiment.

[0133] like Figure 20 as well as Figure 21 As shown, the support portion 4a2 is not located below the second operating area A3, while the opening OP2 is located below the second operating area A3. In other words, the housing 4a has an opening OP2 in the area that overlaps with the second operating area A3 when viewed in the vertical direction. Therefore, in the area overlapping with the second operating area A3 when viewed in the vertical direction, the plate-shaped member 2 can deform downwards. Furthermore, the second sensor 3b is located below the second operating area A3. That is, the second sensor 3b is located within the opening OP2 when viewed in the vertical direction.

[0134] like Figure 21As shown, openings OP1 and OP2 are not located below the first non-operating area PA2, and the second support portion 4a22 is located below the first non-operating area PA2. In other words, the second support portion 4a22 supports the first lower main surface DS2 in the area that overlaps with the first non-operating area PA2 when viewed in the vertical direction. Therefore, even in the area that overlaps with the first non-operating area PA2 when viewed in the vertical direction, if the plate member 2 attempts to deform downwards, the second support portion 4a22 will suppress the deformation of the plate member 2. Thus, in the area that overlaps with the first non-operating area PA1 when viewed in the vertical direction, the plate member 2 is less likely to deform downwards. That is, the second operating area A3 is more easily deformed than the non-operating area A2.

[0135] like Figure 21 As shown, sensor unit 1c also includes a second sensor 3b. The second sensor 3b is thin-film shaped and flexible. The second sensor 3b detects the deformation of the plate-shaped member 2. The second sensor 3b includes a piezoelectric thin film 3b1, a third electrode 3b2, and a fourth electrode 3b3. Furthermore, the structure of the second sensor 3b is the same as that of the first sensor 3a, the structure of the piezoelectric thin film 3b1 is the same as that of the piezoelectric thin film 3a1, the structure of the third electrode 3b2 is the same as that of the first electrode 3a2, and the structure of the fourth electrode 3b3 is the same as that of the second electrode 3a3, so the description is omitted. The second sensor 3b is fixed to the first lower main surface DS2 by an adhesive such as double-sided tape, thermosetting adhesive, thermoplastic adhesive, or UV (Ultra Violet) curable adhesive. Furthermore, the second sensor 3b is not limited to a piezoelectric sensor and may also be a strain gauge. In this embodiment, when viewed in the vertical direction, the second sensor 3b is smaller than the first sensor 3a. Alternatively, when viewed in the vertical direction, the second sensor 3b may not be smaller than the first sensor 3a.

[0136] In addition, such as Figure 22 As shown, the piezoelectric film 3b1 has an upper principal surface US3b1 and a lower principal surface DS3b1. The upper principal surface US3b1 corresponds to the second upper principal surface US3a1 of the piezoelectric film 3a1, and the lower principal surface DS3b1 corresponds to the second lower principal surface DS3a1 of the piezoelectric film 3a1. In the piezoelectric film 3b1, PLA is stretched along the uniaxial stretching direction OD2. The uniaxial stretching direction OD2 corresponds to the uniaxial stretching direction OD1 of the piezoelectric film 3a1.

[0137] The third electrode 3b2 has an upper main surface and a lower main surface. The upper main surface corresponds to the upper main surface of the first electrode 3a2, and the lower main surface corresponds to the lower main surface of the first electrode 3a2. In this embodiment, the upper main surface of the third electrode 3b2 is disposed on the first lower main surface DS2.

[0138] like Figure 20 and Figure 21As shown, in this embodiment, the second sensor 3b does not contact the housing 4a. More specifically, the outer edge of the second sensor 3b, viewed in the vertical direction, is surrounded by the inner edge of the support portion 4a2, also viewed in the vertical direction. In this embodiment, the second sensor 3b is located in the area that overlaps with the second operating area A3 when viewed in the vertical direction. Furthermore, the second sensor 3b is not located in the area that overlaps with the non-operating area A2 when viewed in the vertical direction. Therefore, the second sensor 3b can deform in a direction orthogonal to the vertical direction. Additionally, a space is provided below the second sensor 3b. Therefore, the second sensor 3b can also deform in the downward direction.

[0139] In sensor unit 1c, it has the same effect as sensor unit 1, and in electronic device 100c, it has the same effect as electronic device 100. Furthermore, based on sensor unit 1c and electronic device 100c, it is possible to suppress the first sensor 3a from detecting presses on areas other than the first operating area A1, and it is possible to suppress the second sensor 3b from detecting presses on areas other than the second operating area A3. More specifically, the first upper main surface US2 also has a second operating area A3. The second sensor 3b is located in the area that overlaps with the second operating area A3 when viewed in the vertical direction. The second operating area A3 is more deformable than the non-operating area A2. Therefore, when the second operating area A3 is pressed, both the second operating area A3 and the second sensor 3b deform, thereby enabling the second sensor 3b to detect the deformation of the plate-shaped member 2. On the other hand, when the non-operating area A2 is pressed, the non-operating area A2 is not easily deformed. Therefore, the second sensor 3b is not easily deformed, and the second sensor 3b is not easily able to detect the press on the non-operating area A2.

[0140] On the other hand, the non-operating area A2 includes a first non-operating area PA2 located between the first operating area A1 and the second operating area A3. When the first operating area A1 is pressed, the first non-operating area PA2 is not easily deformed, thereby the second sensor 3b is not easily deformed, and the second sensor 3b is not easily able to detect the press against the first operating area A1. Similarly, when the second operating area A3 is pressed, the first non-operating area PA2 is not easily deformed, thereby the first sensor 3a is not easily deformed, and the first sensor 3a is not easily able to detect the press against the second operating area A3. As a result, according to the sensor unit 1c and the electronic device 100c, it is possible to suppress the case where the first sensor 3a detects the press against areas other than the first operating area A1, and it is possible to suppress the case where the second sensor 3b detects the press against areas other than the second operating area A3.

[0141] [Second variation]

[0142] Hereinafter, the sensor unit 1d and electronic device 100d of the second modified embodiment of the present invention will be described with reference to the accompanying drawings. Figure 23 This is a cross-sectional view of electronic device 100d. Furthermore, regarding sensor unit 1d and electronic device 100d, only the parts that differ from sensor unit 1c and electronic device 100c will be described, and will be omitted thereafter.

[0143] In this modified example, sensor unit 1d does not include a second sensor 3b. The longitudinal length of the first sensor 3a in sensor unit 1d is longer than that of the first sensor 3a in sensor unit 1c. As a result, in this modified example, the first sensor 3a is in contact with the housing 4a. Furthermore, the first sensor 3a is also located below the first non-operating area PA2 and below the second operating area A3. That is, in this modified example, the first sensor 3a is located in the area that overlaps with the first operating area A1 when viewed vertically, the area that overlaps with the second operating area A3 when viewed vertically, and the area that overlaps with the first non-operating area PA2 when viewed vertically.

[0144] In the region that overlaps with the first operating region A1 when viewed in the vertical direction, a space is provided below a portion of the first sensor 3a. Therefore, in the region that overlaps with the first operating region A1 when viewed in the vertical direction, the first sensor 3a can deform in the downward direction.

[0145] Furthermore, in the area that overlaps with the second operating area A3 when viewed in the vertical direction, a space is provided below a portion of the first sensor 3a. Therefore, in the area that overlaps with the second operating area A3 when viewed in the vertical direction, the first sensor 3a can deform in the downward direction.

[0146] On the other hand, the second support portion 4a22 supports the lower main surface DS3a of the first sensor 3a in the region that overlaps with the first non-operating region PA2 when viewed in the vertical direction. Therefore, even if the first sensor 3a attempts to deform downwards in the region overlapping with the first non-operating region PA2 when viewed in the vertical direction, the second support portion 4a22 will suppress the deformation. Thus, in the region overlapping with the first non-operating region PA2 when viewed in the vertical direction, the first sensor 3a is less prone to downward deformation.

[0147] According to sensor unit 1d and electronic device 100d, even if they do not have multiple sensors, they can achieve the same effect as sensor unit 1c and electronic device 100c.

[0148] [Fourth Embodiment]

[0149] Hereinafter, the sensor unit 1e and electronic device 100e of the fourth embodiment of the present invention will be described with reference to the accompanying drawings. Figure 24 This is a 3D diagram of electronic device 100e. Figure 25 This is a plan view of electronic device 100e. Figure 26 This is an exploded perspective view of the second sensor 3b in the fourth embodiment. Figure 27 This is a block diagram of sensor unit 1e. Figure 28 This is a flowchart showing how sensor unit 1e infers the second pressing position PP2 and the magnitude of the second pressing force F2 using the second sensor 3b in the fourth embodiment. Furthermore, regarding sensor unit 1e and electronic device 100e, only the parts that differ from sensor unit 1b and electronic device 100b will be described, and will be omitted thereafter.

[0150] The difference between electronic device 100e and electronic device 100b is that housing 4a also has an opening OP2. Furthermore, since the construction of housing 4a in electronic device 100e is the same as that in electronic device 100c, a description is omitted.

[0151] like Figure 24 As shown, the first upper main surface US2 also has a second operating area A3. The second operating area A3 is arranged spaced apart from the first operating area A1. Therefore, the non-operating area A2 includes a first non-operating area PA2 located between the first operating area A1 and the second operating area A3. In this embodiment, as... Figure 25 As shown, the second operation area A3 is located further back than the first operation area A1. Furthermore, the second operation area A3 is located at the center of the first upper main surface US2 in the left-right direction. The user can press the second operation area A3 as well as the first operation area A1, not just the first operation area A1, using a finger or similar object. Moreover, the shape and arrangement of the second operation area A3 are not limited to those shown in this embodiment.

[0152] The sensor unit 1e also includes a second sensor 3b and charge amplifiers 3b4a to 3b4d. The charge amplifiers 3b4a to 3b4d are located, for example, within the opening OP2.

[0153] In this embodiment, such as Figure 26As shown, the second sensor 3b includes a piezoelectric thin film 3b1, third electrodes 3b2a to 3b2d, and a fourth electrode 3b3. Furthermore, the structure of the second sensor 3b in sensor unit 1e is the same as that of the first sensor 3a in sensor unit 1b; the structure of the piezoelectric thin film 3b1 in sensor unit 1e is the same as that of the piezoelectric thin film 3a1 in sensor unit 1b; the structure of the third electrodes 3b2a to 3b2d in sensor unit 1e is the same as that of the first electrodes 3a2a to 3a2d in sensor unit 1b; and the structure of the fourth electrode 3b3 in sensor unit 1e is the same as that of the second electrode 3a3 in sensor unit 1b. Therefore, further explanation is omitted.

[0154] The piezoelectric film 3b1 has an upper principal surface US3b1 and a lower principal surface DS3b1. The upper principal surface US3b1 corresponds to the second upper principal surface US3a1 of the piezoelectric film 3a1, and the lower principal surface DS3b1 corresponds to the second lower principal surface DS3a1 of the piezoelectric film 3a1. In the piezoelectric film 3b1, PLA is stretched along the uniaxial stretching direction OD2. The uniaxial stretching direction OD2 corresponds to the uniaxial stretching direction OD1 of the piezoelectric film 3a1.

[0155] In this embodiment, the second sensor 3b does not contact the housing 4a. More specifically, the outer edge of the second sensor 3b, viewed in the vertical direction, is surrounded by the inner edge of the support portion 4a2, also viewed in the vertical direction. In this embodiment, the second sensor 3b is located in the area that overlaps with the second operating area A3 when viewed in the vertical direction. Furthermore, the second sensor 3b is not located in the area that overlaps with the non-operating area A2 when viewed in the vertical direction. Therefore, the second sensor 3b can deform in a direction orthogonal to the vertical direction. Additionally, a space is provided below the second sensor 3b. Therefore, the second sensor 3b can also deform in the downward direction.

[0156] like Figure 27 As shown, charge amplifiers 3b4a to 3b4d convert the charge output from the third electrodes 3b2a to 3b2d into voltage signals vba to vbd, respectively, and output them to the operational circuit 35. Furthermore, in this invention, charge amplifiers 3b4a to 3b4d are not essential components.

[0157] The arithmetic circuit 35 reads a program from the memory 36 based on voltage signals vba to vbd to infer the second pressing position PP2 of the first upper main surface US2 being pressed and the magnitude F2 of the second pressing force applied to the first upper main surface US2. Furthermore, the process by which the arithmetic circuit 35 infers the second pressing position PP2 and the magnitude F2 of the second pressing force based on voltage signals vba to vbd is the same as the process by which it infers the first pressing position PP1 and the magnitude F1 of the first pressing force based on voltage signals vaa to vad, and therefore its description is omitted.

[0158] In sensor unit 1e, it has the same effect as sensor units 1b and 1c, and in electronic device 100e, it has the same effect as electronic devices 100b and 100c. In addition, according to sensor unit 1e and electronic device 100e, the user can perform keyboard operation by pressing the first operation area A1, and can perform mouse operation by pressing the second operation area A3.

[0159] [3rd variation]

[0160] Hereinafter, the electronic device 100f of the third modification of the present invention will be described with reference to the accompanying drawings. Figure 28 This is a cross-sectional view of electronic device 100f. Furthermore, regarding electronic device 100f, only the parts that differ from electronic device 100c will be described, and the rest will be omitted.

[0161] like Figure 28 As shown, the difference between electronic device 100f and electronic device 100c is that the material of the second support portion 4a22 is different from the material of the first support portion 4a21 and the bottom portion 4a1.

[0162] In this modified example, the material of the first support portion 4a21 and the bottom portion 4a1 is, for example, a resin such as polycarbonate. The material of the second support portion 4a22 is a metal such as aluminum or titanium. The elastic modulus of the second support portion 4a22 is greater than that of the first support portion 4a21 and the bottom portion 4a1. In other words, the second support portion 4a22 is harder and less prone to deformation than the first support portion 4a21 and the bottom portion 4a1. Therefore, the second support portion 4a22 is less prone to deformation than the first support portion 4a21 and the bottom portion 4a1.

[0163] In electronic device 100f, it achieves the same effect as electronic device 100c. Furthermore, according to electronic device 100f, by making the elastic modulus of the second support portion 4a22 larger than the elastic modulus of the bottom portion 4a1, it is possible to further suppress the first sensor 3a from detecting presses on areas other than the first operating area A1, and it is possible to further suppress the second sensor 3b from detecting presses on areas other than the second operating area A3.

[0164] Alternatively, the elastic modulus of the second support portion 4a22 may not be greater than that of the first support portion 4a21 or the bottom portion 4a1. In this case, it is possible to further suppress the first sensor 3a from detecting pressure on areas other than the first operating area A1, and to further suppress the second sensor 3b from detecting pressure on areas other than the second operating area A3. Therefore, the material of the first support portion 4a21 or the bottom portion 4a1 may be, for example, a metal such as aluminum or titanium, and the material of the second support portion 4a22 may be, for example, a resin such as polycarbonate. Furthermore, the material of the second support portion 4a22 is not limited to metal or resin. Additionally, similar to the sensor unit 1d in the second modification, the first sensor 3a or the second sensor 3b may be arranged in contact with the second support portion 4a22.

[0165] [Fifth Embodiment]

[0166] Hereinafter, the sensor unit 1g and electronic device 100g of the fifth embodiment of the present invention will be described with reference to the accompanying drawings. Figure 29 This is a cross-sectional view of electronic device 100g. Furthermore, regarding sensor unit 1g and electronic device 100g, only the parts that differ from sensor unit 1 and electronic device 100g will be described, and will be omitted thereafter.

[0167] like Figure 29 As shown, the sensor unit 1g differs from the sensor unit 1 in that it also includes a display 7, and the plate-shaped member 2 is transparent. The display 7 is a liquid crystal display or an organic EL display, etc.

[0168] The display 7 has a third upper main surface US7 and a third lower main surface DS7, which are arranged in the order described above along the downward direction. When viewed in the vertical direction, the display 7 has a rectangular shape, which has two long sides extending in the left-right direction and two short sides extending in the front-back direction. In this embodiment, the outer edge of the display 7 viewed in the vertical direction coincides with the outer edge of the plate-like member 2 viewed in the vertical direction. The display 7 is disposed on the first lower main surface DS2. In this embodiment, the display 7 covers the first lower main surface DS2. Alternatively, when viewed in the vertical direction, the display 7 may not have a rectangular shape. Furthermore, the outer edge of the display 7 viewed in the vertical direction may not coincide with the outer edge of the plate-like member 2 viewed in the vertical direction.

[0169] In this embodiment, instead of the area near the outer edge of the first lower main surface DS2, the area near the outer edge of the third lower main surface DS7 is supported on the upper surface of the support portion 4a2 by an adhesive such as double-sided tape, thermosetting adhesive, thermoplastic adhesive, or UV (Ultra Violet) curable adhesive. The first sensor 3a is provided on the third lower main surface DS7. Furthermore, the shape and arrangement of the display 7 are not limited to the shape and arrangement shown in this embodiment.

[0170] In sensor unit 1g, it also has the same effect as sensor unit 1.

[0171] [4th variation]

[0172] Hereinafter, the sensor unit 1h and electronic device 100h of the fourth modification of the present invention will be described with reference to the accompanying drawings. Figure 30 This is a cross-sectional view of electronic device 100h. Furthermore, regarding sensor unit 1h and electronic device 100h, only the parts that differ from sensor unit 1g and electronic device 100g will be described, and will be omitted thereafter.

[0173] like Figure 30 As shown, the difference between sensor unit 1h and sensor unit 1g is that the display 7 is located on the lower main surface DS3a, and the first sensor 3a is transparent.

[0174] In this modified example, the outer edge of the display 7, as viewed in the vertical direction, coincides with the outer edge of the first sensor 3a, as viewed in the vertical direction. In this embodiment, the display 7 covers the lower main surface DS3a. A space is provided between the display 7 and the bottom 4a1. Alternatively, the outer edge of the display 7, as viewed in the vertical direction, may not coincide with the outer edge of the first sensor 3a, as viewed in the vertical direction.

[0175] In sensor unit 1h, it also has the same effect as sensor unit 1.

[0176] [5th ​​variation]

[0177] Hereinafter, the electronic device 100i of the fifth modification of the present invention will be described with reference to the accompanying drawings. Figure 31 This is a cross-sectional view of electronic device 100i. Furthermore, regarding electronic device 100i, only the parts that differ from electronic device 100 will be described, and will be omitted thereafter.

[0178] like Figure 31 As shown, the electronic device 100i differs from the electronic device 100 in that it also includes a display 7, and the plate-shaped member 2 and the first sensor 3a are transparent. Furthermore, since the structure of the display 7 is the same as that of the display 7 in the sensor unit 1g, its description is omitted.

[0179] The display 7 is located within the opening OP1. In this modified example, the display 7 is disposed on the upper surface of the bottom 4a1. A space is provided between the display 7 and the first sensor 3a.

[0180] In electronic device 100i, it also has the same effect as electronic device 100.

[0181] [Sixth Implementation]

[0182] Hereinafter, the electronic device 100j according to the sixth embodiment of the present invention will be described with reference to the accompanying drawings. Figure 32 This is a cross-sectional view of electronic device 100j. Figure 33 This is a cross-sectional view of the first operating area A1 of the plate-shaped member 2 in the sixth embodiment when the user presses it. Furthermore, regarding the electronic device 100j, only the parts that differ from those of the electronic device 100 will be described, and will be omitted thereafter.

[0183] like Figure 32 As shown, the difference between electronic device 100j and electronic device 100 is that electronic device 100j also has a buffer 8.

[0184] The buffer 8 is disposed on the upper surface of the bottom 4a1. More specifically, the buffer 8 is disposed between the first sensor 3a and the bottom 4a1 in the area that overlaps with the first operating area A1 when viewed in the vertical direction.

[0185] The cushioning element 8 is a foam-molded component, for example, made of a component with shape-restoring properties. Thus, for example, as... Figure 33 As shown, when the user presses the first upper main surface US2, the plate-shaped member 2, the first sensor 3a, and the buffer member 8 are temporarily compressed. However, when the user releases the pressure on the first upper main surface US2, the buffer member 8 readily generates a restoring force attempting to return to its pre-compression shape, and the plate-shaped member 2 and the first sensor 3a readily return to their pre-compression shape. Furthermore, the buffer member 8 may not necessarily be a foam-molded component, and may not possess shape-restoring properties.

[0186] The elastic modulus of the buffer member 8 is smaller than that of the plate member 2. That is, the buffer member 8 is softer and more easily deformed than the plate member 2. Therefore, when the user presses the first upper main surface US2, the deformation of the plate member 2 is not easily hindered by the buffer member 8. Therefore, the deformation of the first sensor 3a is not easily hindered by the buffer member 8.

[0187] In electronic device 100j, it achieves the same effect as electronic device 100. Furthermore, according to electronic device 100j, the first pressing position PP1 where the first upper main surface US2 is pressed can be inferred with higher accuracy. More specifically, the buffer 8 is provided between the first sensor 3a and the bottom 4a1 in the area overlapping with the first operating area A1 when viewed in the vertical direction. Therefore, when the first upper main surface US2 is pressed, local deformation occurs near the first pressing position PP1. Thus, the first sensor 3a detects the deformation of the plate member 2 while deformation outside the area near the first pressing position PP1 is suppressed. Therefore, the first sensor 3a can further locally detect the deformation of the plate member 2. As a result, according to electronic device 100j, the first pressing position PP1 where the first upper main surface US2 is pressed can be inferred with higher accuracy.

[0188] Furthermore, in this embodiment, an example is shown where the electronic device 100j includes a buffer 8, but it is also possible for the sensor unit 1 to include a buffer 8. In this case, by providing the buffer 8 on the lower main surface DS3a, the buffer 8 can be provided between the first sensor 3a and the bottom 4a1 in the area that overlaps with the first operating area A1 when viewed in the vertical direction.

[0189] [Seventh Embodiment]

[0190] Hereinafter, the tactile prompting device 10 and electronic device 100k of the seventh embodiment of the present invention will be described with reference to the accompanying drawings. Figure 34 This is a cross-sectional view of electronic device 100k. Furthermore, regarding electronic device 100k, only the parts that differ from electronic device 100 will be described, and the rest will be omitted.

[0191] like Figure 34 As shown, in this embodiment, the sensor unit 1 and the actuator 9 constitute the tactile prompting device 10. That is, the tactile prompting device 10 includes the sensor unit 1 and the actuator 9.

[0192] The actuator 9 causes the plate-shaped member 2 to vibrate. More specifically, in this modified example, the actuator 9 is located on the lower main surface DS3a. That is, the actuator 9 is located below the first lower main surface DS2. For example, when the first electrode 3a2 outputs a charge, the actuator 9 is activated, causing the plate-shaped member 2 to vibrate. Such an actuator 9 is, for example, an LRA (Linear Resonant Actuator) piezoelectric actuator.

[0193] The tactile prompting device 10 also serves the same function as the sensor unit 1. Furthermore, the tactile prompting device 10 can provide the user with information such as whether the plate-shaped member 2 has been pressed, or whether the sensor unit 1 can be activated.

[0194] [Eighth Embodiment]

[0195] Hereinafter, the sensor unit 11 and electronic device 1001 of the eighth embodiment of the present invention will be described with reference to the accompanying drawings. Figure 35 This is a 3D view of electronic device 100L. Figure 36 This is a plan view of thin film 11. Figure 37 This is a planar view of thin film 12. Figure 38 This is a planar schematic diagram of the conductive object M1 pressing the electronic device 100l. Figure 39 This is a planar schematic diagram of the conductive object M2 pressing the electronic device 100l. Figure 40 This is a flowchart of a process for determining whether to output the first pressing position PP1 and the magnitude F1 of the first pressing force inferred by the sensor unit 1l. Furthermore, regarding the sensor unit 1l and the electronic device 100l, only the parts that differ from those of the sensor unit 1 and the electronic device 100l will be described, and will be omitted thereafter.

[0196] The sensor unit 11 differs from the sensor unit 1 in that it also includes charge amplifiers 3a4a to 3a4d, an arithmetic circuit 35, a memory 36, and thin films 11 and 12. Furthermore, the first sensor 3a includes first electrodes 3a2a to 3a2d instead of the first electrode 3a2. Regarding the charge amplifiers 3a4a to 3a4d, only the parts different from those in the sensor unit 1b will be described; regarding the arithmetic circuit 35, only the parts different from those in the sensor unit 1b will be described; regarding the memory 36, only the parts different from those in the sensor unit 1b will be described; and regarding the first electrodes 3a2a to 3a2d, only the parts different from those in the sensor unit 1b will be described, and will be omitted thereafter. Furthermore, the thin films 11 and 12 correspond to the touch position detection unit of the present invention.

[0197] The thin film 11 has an upper main surface and a lower main surface, which are arranged in the above order along the downward direction. For example... Figure 36 As shown, when viewed in the vertical direction, the film 11 has a rectangular shape, which has two long sides extending in the horizontal direction and two short sides extending in the front-back direction. In this embodiment, the outer edge of the film 11 viewed in the vertical direction coincides with the outer edge of the plate-like member 2 viewed in the vertical direction. The film 11 is disposed on the first upper main surface US2. In this embodiment, the film 11 covers the first upper main surface US2. Alternatively, when viewed in the vertical direction, the film 11 may not have a rectangular shape. Furthermore, the outer edge of the film 11 viewed in the vertical direction may not coincide with the outer edge of the plate-like member 2 viewed in the vertical direction. The shape and arrangement of the film 11 are not limited to the shape and arrangement shown in this embodiment.

[0198] First electrostatic capacitive electrodes 11a to 11k are provided on the lower main surface of the thin film 11. Each of the first electrostatic capacitive electrodes 11a to 11k is conductive. The material of each of the first electrostatic capacitive electrodes 11a to 11k is, for example, copper. In the region where the first electrostatic capacitive electrodes 11a to 11k overlap with the first operating region A1 when viewed in the vertical direction, they are arranged at equal intervals along the right direction in the above-described order. Alternatively, the first electrostatic capacitive electrodes 11a to 11k may not be arranged in the region where they overlap with the first operating region A1 when viewed in the vertical direction, but may be arranged at equal intervals along the right direction in the above-described order.

[0199] The thin film 12 has an upper main surface and a lower main surface, which are arranged in the order described above along the downward direction. For example... Figure 37 As shown, when viewed in the vertical direction, the film 12 has a rectangular shape, which has two long sides extending in the horizontal direction and two short sides extending in the front-back direction. In this embodiment, the outer edge of the film 12 viewed in the vertical direction coincides with the outer edge of the plate-like member 2 viewed in the vertical direction. The film 12 is disposed on the upper main surface of the film 11. In this embodiment, the film 12 covers the upper main surface of the film 11. Alternatively, when viewed in the vertical direction, the film 12 may not have a rectangular shape. Furthermore, the outer edge of the film 12 viewed in the vertical direction may not coincide with the outer edge of the plate-like member 2 viewed in the vertical direction. The shape and arrangement of the film 12 are not limited to the shape and arrangement shown in this embodiment.

[0200] Second electrostatic capacitive electrodes 12a to 12d are provided on the lower main surface of the thin film 12. The second electrostatic capacitive electrodes 12a to 12d are each conductive. The material of the second electrostatic capacitive electrodes 12a to 12d is, for example, copper. The second electrostatic capacitive electrodes 12a to 12d are arranged in the downward direction at equal intervals in the above-described order in the region overlapping with the first operating region A1 when viewed in the vertical direction. Alternatively, the second electrostatic capacitive electrodes 12a to 12d may not be arranged in the region overlapping with the first operating region A1 when viewed in the vertical direction, but may be arranged in the downward direction at equal intervals in the above-described order.

[0201] When viewed in the vertical direction, the first electrostatic capacitor electrode 11a has a region that overlaps with any one of the second electrostatic capacitor electrodes 12a to 12d. Therefore, the first electrostatic capacitor electrode 11a and each of the second electrostatic capacitor electrodes 12a to 12d are capacitively coupled. Consequently, the group of the first electrostatic capacitor electrode 11a and each of the second electrostatic capacitor electrodes 12a to 12d has electrostatic capacitance.

[0202] Similarly, the first electrostatic capacitor electrodes 11b to 11k each have a region overlapping with any one of the second electrostatic capacitor electrodes 12a to 12d. Thus, each of the first electrostatic capacitor electrodes 11b to 11k and each of the second electrostatic capacitor electrodes 12a to 12d are capacitively coupled. Therefore, the group of each of the first electrostatic capacitor electrodes 11b to 11k and each of the second electrostatic capacitor electrodes 12a to 12d has electrostatic capacitance.

[0203] When a conductive object such as a pen or a user's finger approaches the first electrostatic capacitive electrodes 11a-11k or the second electrostatic capacitive electrodes 12a-12d, the electrostatic capacitance of at least one group of the first electrostatic capacitive electrodes 11a-11k and the second electrostatic capacitive electrodes 12a-12d changes. For example, suppose a user's finger approaches the area where the first electrostatic capacitive electrodes 11a and 12a overlap when viewed vertically. At this time, capacitive coupling occurs between the user's finger and the second electrostatic capacitive electrode 12a, and the electrostatic capacitance of the group of the first electrostatic capacitive electrodes 11a and 12a changes. Therefore, the position of the group of the first and second electrostatic capacitive electrodes whose electrostatic capacitance has changed can be set as the touch position for a touch operation on the first upper main surface US2. Therefore, the thin films 11 and 12 function as touch position detection units for detecting the touch position for a touch operation on the first upper main surface US2. Furthermore, in this specification, touch operations on the first upper main surface US2 are not limited to situations where an object such as a pen or a user's finger comes into contact with the first upper main surface US2, but include situations where an object such as a pen or a user's finger approaches the first upper main surface US2, as in this embodiment. Additionally, the method for detecting the touch position of touch operations on the first upper main surface US2 is not limited to the method shown in this embodiment.

[0204] Furthermore, if the electrostatic capacitance of adjacent groups of first and second electrostatic capacitance electrodes changes simultaneously, it can be assumed that the touch operation was performed by an object whose electrostatic capacitance change is greater than that of a single group of first and second electrostatic capacitance electrodes. Therefore, the area of ​​the object close to the first upper main surface US2 corresponding to the touch operation can be calculated based on the changes in electrostatic capacitance of the groups of first and second electrostatic capacitance electrodes.

[0205] For example, such as Figure 38As shown, when a conductive object M1 approaches the first upper main surface US2 in a manner that covers the group of the first electrostatic capacitance electrode 11c and the second electrostatic capacitance electrode 12b, only the electrostatic capacitance of the group of the first electrostatic capacitance electrode 11c and the second electrostatic capacitance electrode 12b changes. At this time, when viewed in the vertical direction, the area of ​​the overlapping region of the first electrostatic capacitance electrode 11c and the second electrostatic capacitance electrode 12b can be set as the area of ​​the conductive object M1 approaching the first upper main surface US2. The conductive object M1 is, for example, a pen or a user's finger.

[0206] In addition, such as Figure 39 As shown, the conductive object M2 approaches the first electrostatic capacitor electrode 11g and the second electrostatic capacitor electrode 12b in a manner that covers the group of the first electrostatic capacitor electrode 11g and the second electrostatic capacitor electrode 12c, the group of the first electrostatic capacitor electrode 11h and the second electrostatic capacitor electrode 12b, the group of the first electrostatic capacitor electrode 11h and the second electrostatic capacitor electrode 12c, the group of the first electrostatic capacitor electrode 11i and the second electrostatic capacitor electrode 12b, the group of the first electrostatic capacitor electrode 11i and the second electrostatic capacitor electrode 12c, the group of the first electrostatic capacitor electrode 11j and the second electrostatic capacitor electrode 12b, and the group of the first electrostatic capacitor electrode 11j and the second electrostatic capacitor electrode 12c. In the case of the upper main surface US2, the electrostatic capacitance of the following groups changes: the first electrostatic capacitance electrode 11g and the second electrostatic capacitance electrode 12b; the first electrostatic capacitance electrode 11g and the second electrostatic capacitance electrode 12c; the first electrostatic capacitance electrode 11h and the second electrostatic capacitance electrode 12b; the first electrostatic capacitance electrode 11h and the second electrostatic capacitance electrode 12c; the first electrostatic capacitance electrode 11i and the second electrostatic capacitance electrode 12b; the first electrostatic capacitance electrode 11i and the second electrostatic capacitance electrode 12c; the first electrostatic capacitance electrode 11j and the second electrostatic capacitance electrode 12b; and the first electrostatic capacitance electrode 11j and the second electrostatic capacitance electrode 12c. At this time, the product of the distance between the front edge of the second electrostatic capacitance electrode 12b and the rear edge of the second electrostatic capacitance electrode 12c, and the distance between the left side of the first electrostatic capacitance electrode 11g and the right side of the first electrostatic capacitance electrode 11j, can be set as the area of ​​the conductive object M2 approximately equal to the first upper main surface US2. The conductive object M1 is, for example, the user's palm. Furthermore, the method for calculating the area of ​​the object close to the first upper main surface US2 is not limited to the method shown in this embodiment.

[0207] Thin films 11 and 12 output the electrostatic capacitance of each of the first electrostatic capacitance electrodes 11a to 11k and each of the second electrostatic capacitance electrodes 12a to 12d to the arithmetic circuit 35. The group of first and second electrostatic capacitance electrodes whose electrostatic capacitance has changed is the touch position. The arithmetic circuit 35 reads the processing program from the memory 36 based on the voltage signals vaa to vad and the electrostatic capacitance of each of the first electrostatic capacitance electrodes 11a to 11k and each of the second electrostatic capacitance electrodes 12a to 12d, and outputs the first pressing position PP1 and the magnitude of the first pressing force F1. Therefore, the arithmetic circuit 35 processes the output of the first pressing position PP1 and the magnitude of the first pressing force F1 based on the voltage signals vaa~vad and the electrostatic capacitance of the group of each of the first electrostatic capacitor electrodes 11a~11k and the group of each of the second electrostatic capacitor electrodes 12a~12d.

[0208] A threshold S is pre-input into memory 36. In addition to storing the above-mentioned program, memory 36 also stores the threshold S.

[0209] The following describes in detail the processing of the output of the first pressing position PP1 and the magnitude of the first pressing force F1 in the arithmetic circuit 35. This processing begins by acquiring voltage signals vaa to vad through the arithmetic circuit 35. Figure 40 Step S1). Furthermore, since steps S1 to S3 in this process are the same as steps S1 to S3 in the process of deducing the first pressing position PP1 and the magnitude of the first pressing force F1 in the arithmetic circuit 35 of the second embodiment, the description is omitted.

[0210] After determining the first pressing position PP1 and the magnitude of the first pressing force F1, the arithmetic circuit 35 detects the group of the first electrostatic capacitor electrode and the second electrostatic capacitor electrode whose electrostatic capacitance has changed. Figure 40 Step S4).

[0211] Next, the arithmetic circuit 35 calculates the number of touch operations and the area of ​​the object corresponding to the touch operation based on the group of the first and second electrostatic capacitor electrodes (touch position) where the electrostatic capacitance has changed. Figure 40 Step S5).

[0212] Next, the arithmetic circuit 35 determines whether there are multiple objects whose areas have been calculated. Figure 40 Step S6). When there are multiple touch operations, the arithmetic circuit 35 determines, for each touch operation, whether the area of ​​the object corresponding to the touch operation is below a threshold S. Figure 40Step S7). If the area of ​​the object corresponding to the touch operation is below the threshold S, the arithmetic circuit 35 outputs the magnitude F1 of the first pressing position PP1 or the first pressing force corresponding to the touch operation. Figure 40 Step S8). The threshold S is, for example, the area of ​​the region where one first electrostatic capacitor electrode and one second electrostatic capacitor electrode overlap when viewed in the vertical direction. When the number of touch operations is odd, the arithmetic circuit 35 also outputs the inferred first press position PP1 and the magnitude of the first press force F1. Figure 40 Step S8).

[0213] On the other hand, if the area of ​​the object corresponding to the touch operation is larger than the threshold S, the arithmetic circuit 35 does not output the first pressing position PP1 and the magnitude F1 of the first pressing force corresponding to the touch operation. Figure 40 Step S9).

[0214] Furthermore, in this embodiment, an example is shown where the area of ​​the object corresponding to the touch operation is calculated after the first pressing position PP1 and the magnitude of the first pressing force F1 are inferred. However, the area of ​​the object corresponding to the touch operation can also be calculated at the same time as the first pressing position PP1 and the magnitude of the first pressing force F1 are inferred, or the area of ​​the object corresponding to the touch operation can be calculated before the first pressing position PP1 and the magnitude of the first pressing force F1 are inferred.

[0215] In sensor unit 1l, the same effect is achieved as in sensor unit 1. Furthermore, according to sensor unit 1l, even if a user presses the first operation area A1 with a pen or finger, and their palm touches the first operation area A1, the influence of the palm pressing the first operation area A1 can be suppressed. More specifically, there is a possibility that, if the calculation circuit 35 calculates a plurality of touch operations with different areas, at least one of these touch operations includes a touch operation caused by user error. Therefore, the calculation circuit 35 calculates the number of touch operations. When the calculated number of touch operations is multiple, the calculation circuit 35 determines, for each of the multiple touch operations, whether the area of ​​the object corresponding to the touch operation is below a threshold S. The threshold S is, for example, a value that is larger than the area of ​​the pen or the user's finger when touching the first upper main surface US2, and smaller than the area of ​​the palm when touching the first upper main surface US2. Thus, the arithmetic circuit 35 is able to distinguish between pressure based on a pen or the user's finger and pressure based on the palm.

[0216] When the area of ​​the object corresponding to the touch operation is less than or equal to a threshold S, the arithmetic circuit 35 outputs the first pressing position PP1 or the magnitude of the first pressing force F1 corresponding to the touch operation. On the other hand, when the area of ​​the object corresponding to the touch operation is greater than the threshold S, the arithmetic circuit 35 does not output the first pressing position PP1 or the magnitude of the first pressing force F1 corresponding to the touch operation. Thus, even if the user presses the first operation area A1 with a pen or finger and the palm touches the first operation area A1, the influence of the palm pressing the first operation area A1 can be suppressed.

[0217] [Other Implementation Methods]

[0218] The sensor unit of the present invention is not limited to sensor units 1, 1a to 1e, 1g, 1h, and 1l, and can be modified within its scope. In addition, the structures of sensor units 1, 1a to 1e, 1g, 1h, and 1l can be combined arbitrarily.

[0219] The tactile prompting device of the present invention is not limited to the tactile prompting device 10, and can be modified within the scope of its spirit.

[0220] The electronic device of the present invention is not limited to electronic devices 100, 100a to 100l, and can be modified within the scope of its spirit. In addition, the structures of electronic devices 100, 100a to 100l can be combined arbitrarily.

[0221] The present invention has the following structure. (1)

[0223] A sensor unit, wherein,

[0224] This sensor unit has the following features:

[0225] A plate-like member having a first upper principal surface and a first lower principal surface; and

[0226] The first sensor, which is fixed to the first lower main surface, detects the deformation of the plate-shaped member.

[0227] The first upper main surface has:

[0228] The first operating area; and

[0229] Non-operational area

[0230] At least a portion of the first sensor is located in the area that overlaps with the first operating area when viewed in the vertical direction.

[0231] The non-operating area is less prone to deformation compared to the first operating area. (2)

[0233] In the sensor unit described in (1),

[0234] The first sensor includes a piezoelectric thin film having a second upper main surface and a second lower main surface.

[0235] The piezoelectric film generates a potential difference between the second upper main surface and the second lower main surface through deformation. (3)

[0237] In the sensor unit described in (2),

[0238] It also has arithmetic circuits.

[0239] The first sensor also includes a plurality of signal electrodes disposed on the second upper main surface or the second lower main surface.

[0240] The plurality of signal electrodes respectively output the potential difference as an electrical signal to the computing circuit.

[0241] The computing circuit infers the pressing position of the first upper main surface or the magnitude of the pressing force applied to the first upper main surface based on the electrical signal. (4)

[0243] In the sensor unit described in (3),

[0244] It also includes a touch position detection unit for detecting the touch position of a touch operation on the first upper main surface.

[0245] The touch position detection unit outputs the touch position to the computing circuit.

[0246] For the aforementioned operational circuit

[0247] It calculates the number of touch operations and the area of ​​the object corresponding to each touch operation based on the touch location.

[0248] If the calculated number of touch operations is multiple, for each of the multiple touch operations, it is determined whether the area is below a predetermined threshold.

[0249] If the area is below the threshold, the pressing position or the magnitude of the pressing force corresponding to the touch operation is output; if the area is larger than the threshold, the pressing position and the magnitude of the pressing force corresponding to the touch operation are not output. (5)

[0251] In any of the sensor units described in (1) to (4),

[0252] The first sensor is located in the region that overlaps with the first operating region when viewed along the vertical direction, and in the region that overlaps with the non-operating region when viewed along the vertical direction. (6)

[0254] In any of the sensor units described in (1) to (4),

[0255] The first upper main surface also has a second operating area.

[0256] The second operating region is more easily deformable than the non-operating region.

[0257] The non-operating area includes a first non-operating area located between the first operating area and the second operating area.

[0258] The first sensor is located in the region that overlaps with the first operating region when viewed along the vertical direction, the region that overlaps with the second operating region when viewed along the vertical direction, and the region that overlaps with the first non-operating region when viewed along the vertical direction. (7)

[0260] In any of the sensor units described in (1) to (4),

[0261] It also includes a second sensor, which is fixed to the first lower main surface, to detect the deformation of the plate-shaped member.

[0262] The first upper main surface also has a second operating area.

[0263] The second operating region is more easily deformable than the non-operating region.

[0264] The non-operating area includes a first non-operating area located between the first operating area and the second operating area.

[0265] The second sensor is located in the area that overlaps with the second operating area when viewed along the vertical direction. (8)

[0267] In any of the sensor units described in (1) to (7),

[0268] The plate-shaped component is a display. (9)

[0270] In any of the sensor units described in (1) to (7),

[0271] It also features a display with a third upper main panel and a third lower main panel.

[0272] The plate-shaped component is a transparent surface panel.

[0273] The display is located on the first lower main surface.

[0274] The first sensor is located on the third lower main surface. (10)

[0276] In any of the sensor units described in (1) to (7),

[0277] It also has a monitor.

[0278] The plate-shaped component is a transparent surface panel.

[0279] The first sensor is transparent and has a fourth upper main surface and a fourth lower main surface.

[0280] The first sensor is located on the first lower main surface.

[0281] The display is located on the fourth lower main surface. (11)

[0283] A tactile cues device, wherein,

[0284] The tactile feedback device has the following features:

[0285] The sensor unit described in any one of (1) to (10); and

[0286] An actuator that causes the plate-like member to vibrate.

[0287] The actuator is located below the first lower main surface. (12)

[0289] An electronic device, wherein,

[0290] This electronic device has:

[0291] The sensor unit described in any one of (1) to (10); and

[0292] case,

[0293] The housing supports the first lower main surface in the region that overlaps with the non-operating area when viewed along the vertical direction. (13)

[0295] In the electronic devices described in (12),

[0296] The housing has an opening in a region that overlaps with the first operating area when viewed along the vertical direction.

[0297] The first sensor is located within the opening when viewed along the vertical direction. (14)

[0299] In the electronic devices described in (12) or (13),

[0300] In the area that overlaps with the first operating area when viewed along the vertical direction, there is a space below the first sensor. (15)

[0302] In any of the electronic devices described in (12) to (14),

[0303] It also has a cushioning component.

[0304] The housing includes a bottom located below the first sensor.

[0305] The buffer is located between the first sensor and the bottom in the area that overlaps with the first operating area when viewed along the vertical direction. (16)

[0307] An electronic device, wherein,

[0308] This electronic device has:

[0309] (5) The sensor unit described; and

[0310] case,

[0311] The housing supports the first sensor in the region that overlaps with the non-operating area when viewed along the vertical direction. (17)

[0313] An electronic device, wherein,

[0314] This electronic device has:

[0315] (6) The sensor unit described; and

[0316] case,

[0317] The housing includes a support portion.

[0318] The support portion supports the first sensor in the region that overlaps with the first non-operating region when viewed along the vertical direction. (18)

[0320] An electronic device, wherein,

[0321] This electronic device has:

[0322] (7) The sensor unit described; and

[0323] case,

[0324] The housing includes a support portion.

[0325] The support portion supports the first lower main surface in the area that overlaps with the first non-operating area when viewed along the vertical direction. (19)

[0327] In the electronic devices described in (17) or (18),

[0328] The housing also includes a bottom located below the first sensor.

[0329] The elastic modulus of the support portion is greater than that of the bottom portion. (20)

[0331] An electronic device, wherein,

[0332] This electronic device has:

[0333] The sensor unit described in any of (1) to (7);

[0334] Casing; and

[0335] monitor,

[0336] The housing includes:

[0337] Support; and

[0338] At the bottom, it is located below the first sensor.

[0339] The support portion supports the first lower main surface or the first sensor in the area overlapping with the non-operating area when viewed along the vertical direction.

[0340] The plate-shaped component is a transparent surface panel.

[0341] The first sensor is transparent.

[0342] The display is located at the bottom.

[0343] Explanation of reference numerals in the attached figures

[0344] 1. 1a-1e, 1g, 1h, 1l, sensor unit; 2. Plate-shaped component; 3a, first sensor; 3b, second sensor; 3a1, 3b1, piezoelectric film; 3a2, 3a2a-3a2d, first electrode; 3a3, second electrode; 3b3, fourth electrode; 4a, 4b, housing; 4a1, bottom; 4a2, support; 4a21, first support; 4a22, second support; 5, 7, display; 6a, 6b, connecting part; 8. buffer; 9. actuator; 10. tactile prompting device; 11, 12, film; 11a-11k, first electrostatic capacitive electrode; 12a-12d, second electrostatic capacitive electrode; 35. arithmetic circuit; 36. memory; 100, 100a-100l, electronic device; A1, first operating area; A 3. Second operating area; A2. Non-operating area; D, xa, xa1, xb, xb1, xc, xc1, xd, xd1, distance; DS2. First lower principal surface; DS3a. Lower principal surface; DS3a1. Second lower principal surface; DS3b1. Lower principal surface; DS7. Third lower principal surface; M1, M2. Conductive object; O. Center; OD1. Uniaxial stretching direction; OD2. Uniaxial stretching direction; OP1, OP2. Opening; PA2. First non-operating area; PP1. First pressing position; PP2. Second pressing position; S. Threshold; US2. First upper principal surface; US3a. Upper principal surface; US3a1. Second upper principal surface; US3b1. Upper principal surface; US7. Third upper principal surface; Vaa1, Vab1. Voltage value; vaa, vab, vba. Voltage signal.

Claims

1. A sensor unit, wherein, This sensor unit has the following features: A plate-like member having a first upper principal surface and a first lower principal surface; and The first sensor, which is fixed to the first lower main surface, detects the deformation of the plate-shaped member. The first upper main surface has: Operating area 1; as well as Non-operational area At least a portion of the first sensor is located in the area that overlaps with the first operating area when viewed in the vertical direction. The non-operating area is less prone to deformation compared to the first operating area.

2. The sensor unit according to claim 1, wherein, The first sensor includes a piezoelectric thin film having a second upper main surface and a second lower main surface. The piezoelectric film generates a potential difference between the second upper main surface and the second lower main surface through deformation.

3. The sensor unit according to claim 2, wherein, The sensor unit also includes a computing circuit. The first sensor also includes a plurality of signal electrodes disposed on the second upper main surface or the second lower main surface. The plurality of signal electrodes respectively output the potential difference as an electrical signal to the computing circuit. The computing circuit infers the pressing position of the first upper main surface or the magnitude of the pressing force applied to the first upper main surface based on the electrical signal.

4. The sensor unit according to claim 3, wherein, The sensor unit further includes a touch position detection unit for detecting the touch position of a touch operation on the first upper main surface. The touch position detection unit outputs the touch position to the computing circuit. For the aforementioned operational circuit It calculates the number of touch operations and the area of ​​the object corresponding to each touch operation based on the touch location. If the calculated number of touch operations is multiple, for each of the multiple touch operations, it is determined whether the area is below a predetermined threshold. If the area is below the threshold, the pressing position or the magnitude of the pressing force corresponding to the touch operation is output; if the area is larger than the threshold, the pressing position and the magnitude of the pressing force corresponding to the touch operation are not output.

5. The sensor unit according to any one of claims 1 to 4, wherein, The first sensor is located in the region that overlaps with the first operating region when viewed along the vertical direction, and in the region that overlaps with the non-operating region when viewed along the vertical direction.

6. The sensor unit according to any one of claims 1 to 4, wherein, The first upper main surface also has a second operating area. The second operating region is more easily deformable than the non-operating region. The non-operating area includes a first non-operating area located between the first operating area and the second operating area. The first sensor is located in the region that overlaps with the first operating region when viewed along the vertical direction, the region that overlaps with the second operating region when viewed along the vertical direction, and the region that overlaps with the first non-operating region when viewed along the vertical direction.

7. The sensor unit according to any one of claims 1 to 4, wherein, The sensor unit also includes a second sensor, which is fixed to the first lower main surface to detect the deformation of the plate-shaped member. The first upper main surface also has a second operating area. The second operating region is more easily deformable than the non-operating region. The non-operating area includes a first non-operating area located between the first operating area and the second operating area. The second sensor is located in the area that overlaps with the second operating area when viewed along the vertical direction.

8. The sensor unit according to any one of claims 1 to 7, wherein, The plate-shaped component is a display.

9. The sensor unit according to any one of claims 1 to 7, wherein, The sensor unit also includes a display having a third upper main surface and a third lower main surface. The plate-shaped component is a transparent surface panel. The display is located on the first lower main surface. The first sensor is located on the third lower main surface.

10. The sensor unit according to any one of claims 1 to 7, wherein, The sensor unit also includes a display. The plate-shaped component is a transparent surface panel. The first sensor is transparent and has a fourth upper main surface and a fourth lower main surface. The first sensor is located on the first lower main surface. The display is located on the fourth lower main surface.

11. A tactile cues device, wherein, The tactile feedback device has the following features: The sensor unit according to any one of claims 1 to 10; and An actuator that causes the plate-like member to vibrate. The actuator is located below the first lower main surface.

12. An electronic device, wherein, This electronic device has: The sensor unit according to any one of claims 1 to 10; and case, The housing supports the first lower main surface in the region that overlaps with the non-operating area when viewed along the vertical direction.

13. The electronic device according to claim 12, wherein, The housing has an opening in a region that overlaps with the first operating area when viewed along the vertical direction. The first sensor is located within the opening when viewed along the vertical direction.

14. The electronic device according to claim 12 or 13, wherein, In the area that overlaps with the first operating area when viewed along the vertical direction, there is a space below the first sensor.

15. The electronic device according to any one of claims 12 to 14, wherein, The electronic device also includes a buffer. The housing includes a bottom located below the first sensor. The buffer is located between the first sensor and the bottom in the area that overlaps with the first operating area when viewed along the vertical direction.

16. An electronic device, wherein, This electronic device has: The sensor unit as described in claim 5; and case, The housing supports the first sensor in the region that overlaps with the non-operating area when viewed along the vertical direction.

17. An electronic device, wherein, This electronic device has: The sensor unit as claimed in claim 6; and case, The housing includes a support portion. The support portion supports the first sensor in the region that overlaps with the first non-operating region when viewed along the vertical direction.

18. An electronic device, wherein, This electronic device has: The sensor unit as claimed in claim 7; and case, The housing includes a support portion. The support portion supports the first lower main surface in the area that overlaps with the first non-operating area when viewed along the vertical direction.

19. The electronic device according to claim 17 or 18, wherein, The housing also includes a bottom located below the first sensor. The elastic modulus of the support portion is greater than that of the bottom portion.

20. An electronic device, wherein, This electronic device has: The sensor unit according to any one of claims 1 to 7; case; as well as monitor, The housing includes: Support section; as well as At the bottom, it is located below the first sensor. The support portion supports the first lower main surface or the first sensor in the area overlapping with the non-operating area when viewed along the vertical direction. The plate-shaped component is a transparent surface panel. The first sensor is transparent. The display is located at the bottom.

Images