Patent ID: 12194852

DESCRIPTION OF EMBODIMENTS

(Underlying Knowledge Forming Basis of the Present Disclosure)

As described in the background section above, the input device disclosed in PTL 1 can be improved upon. For example, a display device and an input device are often required to not cause a user to feel uncomfortable with a tactile sensation perceived by the user when touching the device. The input device disclosed in PTL 1 can be improved upon in terms of not causing a user to feel uncomfortable with the tactile sensation. Accordingly, the inventors of the present application conducted in-depth studies to make further improvement for a display device and an input device that can cause a user to feel less uncomfortable with the tactile sensation, and arrived at a display device and an input device described below.

A display device according to one aspect of the present disclosure includes: an outer cover that has light transmission properties; a design portion that has light transmission properties and is provided on a front surface side or a back surface side relative to the outer cover; a cushion layer that has light transmission properties and is provided on the back surface side relative to the outer cover; and a light source provided on a back surface side relative to the cushion layer, wherein, when the display device is viewed in a cross section taken along a plane parallel to a stack direction in which the outer cover and the design portion are stacked, the cushion layer includes a plurality of concave portions that are in a convex shape in the stack direction and a concave shape on a side opposite to the convex shape, the plurality of concave portions include first concave portions and second concave portions, the first concave portions are in a convex shape in a first orientation in the stack direction relative to a reference line that is parallel to a first direction that intersects the stack direction and a concave shape on a side opposite to the convex shape in the first orientation, the second concave portions are connected to the first concave portions and are in a convex shape in a second orientation that is opposite to the first orientation in the stack direction relative to the reference line and a concave shape on a side opposite to the convex shape in the second orientation, and the first concave portions and the second concave portions are alternately provided in the first direction.

With this configuration, the cushion layer has a convex-concave shape in the stack direction. Accordingly, the cushion layer is easily compression-deformed when the outer cover is pressed, and it is therefore possible to give a soft tactile sensation to the user. Also, as a result of a plurality of first concave portions and a plurality of second concave portions being formed, the user can perceive the same tactile sensation between when pressing a portion corresponding to a first concave portion and when pressing a portion corresponding to a second concave portion. That is, it is possible to achieve a display device that can cause a user to feel less uncomfortable with the tactile sensation.

Also, for example, the first concave portions and the second concave portions that are alternately provided may form a corrugated shape when the display device is viewed in the cross section taken along the plane parallel to the stack direction.

With this configuration, the cushion layer with a corrugated shape is used. Accordingly, it is possible to suppress the occurrence of brightness variations (design element variations) in the light that has passed through the cushion layer caused by the shape of the cushion layer. Accordingly, it is possible to achieve a display device that can cause a user to feel less uncomfortable with the tactile sensation while suppressing the occurrence of brightness variations.

Also, for example, the cushion layer may include a first corrugated member in which the plurality of first concave portions and the plurality of second concave portions that are alternately provided in the first direction extend in a second direction that intersects the first direction when the display device is viewed in a plan view.

With this configuration, by using a corrugated tabular member as the cushion layer, it is possible to achieve a display device that can cause a user to feel less uncomfortable with the tactile sensation.

Also, for example, the cushion layer may further include a second corrugated member that is provided to overlap the first corrugated member and in which first concave portions and second concave portions that are configured in an identical manner as the first concave portions and the second concave portions of the first corrugated member are alternately provided in the second direction, and the plurality of first concave portions and the plurality of second concave portions that are alternately provided in the second direction extend in a third direction that intersects the second direction when the display device is viewed in the plan view.

With this configuration, it is possible to achieve a display device that can cause a user to feel less uncomfortable with the tactile sensation.

Also, for example, the first direction and the second direction may be orthogonal to each other when the display device is viewed in the plan view, the second direction and the third direction may be orthogonal to each other when the display device is viewed in the plan view, and the first direction and the third direction may be identical directions.

With this configuration, it is possible to achieve a display device that can cause a user to feel less uncomfortable with the tactile sensation.

Also, for example, where a pitch between adjacent ones of the plurality of first concave portions or adjacent ones of the plurality of second concave portions of the first corrugated member is represented by p1, a length in the stack direction between a ridge of each of the plurality of first concave portions and a ridge of each of the plurality of second concave portions of the first corrugated member may be less than p1, and where a pitch between adjacent ones of the plurality of first concave portions or adjacent ones of the plurality of second concave portions of the second corrugated member is represented by p2, a length in the stack direction between a ridge of each of the plurality of first concave portions and a ridge of each of the plurality of second concave portions of the second corrugated member may be less than p2.

With this configuration, the cushion layer can be easily molded because each corrugated member has a small height. That is, it is possible to achieve a display device with improved productivity.

Also, for example, the cushion layer may include the plurality of first concave portions and the plurality of second concave portions that are two-dimensionally arranged when the display device is viewed in a plan view.

With this configuration, it is possible to achieve a display device that can cause a user to feel even less uncomfortable with the tactile sensation.

Also, for example, when the display device is viewed in a cross section taken along a plane parallel to the stack direction, the cushion layer may further include the first concave portions and the second concave portions that are alternately provided in a second direction that intersects the first direction when the display device is viewed in the plan view, in addition to the first concave portions and the second concave portions that are alternately provided in the first direction, the first concave portions and the second concave portions that are alternately provided in the second direction may be positioned differently in the stack direction relative to the reference line from the first concave portions and the second concave portions that are alternately provided in the first direction, and the first concave portions provided in the first direction and the second concave portions provided in the second direction may be connected to each other.

With this configuration, it is possible to achieve a display device that can cause a user to feel even less uncomfortable with the tactile sensation.

Also, for example, the second orientation may be an orientation extending from the cushion layer toward the outer cover, and the plurality of second concave portions each may have a ridge with a flat surface.

With this configuration, the difference in tactile sensation perceived between when a second concave portion is pressed and when a portion between adjacent second concave portions is pressed can be reduced. Accordingly, it is possible to achieve a display device that can cause a user to feel even less uncomfortable with the tactile sensation.

Also, for example, when the display device is viewed in a plan view, the cushion layer may include a first portion on which a design element formed in the design portion is superimposed and a second portion surrounding the first portion, and the first portion may have a light transmission rate higher than a light transmission rate of the second portion.

With this configuration, the design element is brightly displayed. Accordingly, it is possible to achieve a display device with an improved appearance of the design element.

Also, for example, the first portion may be transparent or colored with a light transmission color, and the second portion may have light blocking properties.

With this configuration, it is possible to achieve a display device that can display the design element with a desired color.

Also, for example, a sheet that has light blocking properties may be provided between each adjacent pair of the plurality of first concave portions.

With this configuration, it is possible to suppress a situation in which light that has entered one of adjacent first concave portions leaks from the other first concave portion. Accordingly, it is possible to achieve a display device with an improved appearance of the design element.

Also, for example, the design portion may be provided to be superimposed on two or more of the plurality of first concave portions and two or more of the plurality of second concave portions when the display device is viewed from the stack direction.

With this configuration, the display device can give the same tactile sensation to a user no matter which of the first concave portions and the second concave portions is pressed by the user. Accordingly, it is possible to achieve a display device that can cause a user to feel even less uncomfortable with the tactile sensation.

Also, for example, the cushion layer may be formed by using a silicone rubber that has light transmission properties.

With this configuration, the cushion layer can be easily produced by molding a silicone rubber or the like.

Also, for example, the cushion layer may contain light diffusing particles that have a refractive index different from a refractive index of the silicone rubber. Also, for example, the design portion may contain a silicone rubber that has light transmission properties and light diffusing particles that have a refractive index different from a refractive index of the silicone rubber.

With this configuration, brightness variations caused by the cushion layer can be suppressed. Accordingly, it is possible to achieve a display device with an improved appearance of design elements.

Also, for example, the design portion may include a print layer on which design elements are provided.

With this configuration, the design portion can be produced by using a simple method such as printing.

Also, for example, the design portion may include a design sheet in which design elements are provided.

With this configuration, in the case where it is necessary to change the design elements according to the vehicle model or the like, the design elements can be changed by simply replacing the design sheet to a different one, without changing the outer cover. Also, cushioning properties can be imparted by providing the design sheet. Accordingly, it is possible to achieve a display device that can cause a user to feel even less uncomfortable with the tactile sensation and in which the design elements can be easily changed according to the vehicle model or the like.

Also, for example, the plurality of first concave portions or the plurality of second concave portions may be quadrilateral, hexagonal, or circular in shape when the display device is viewed in a plan view.

With this configuration, by using the first concave portions or the second concave portions that are in a simple shape such as a quadrilateral shape, a hexagonal shape, or a circular shape, it is possible to achieve a display device that can give a soft tactile sensation to the user.

Also, an input device according to one aspect of the present disclosure includes: the display device described above; and a detector that is provided on the back surface side relative to the cushion layer and detects an operation from a user.

With this configuration, the same advantageous effects as those of the display device described above can be obtained.

Also, for example, the cushion layer may be compression-deformed in response to the outer cover being pressed.

With this configuration, the cushion layer is compression-deformed in response to the outer cover being pressed. Accordingly, it is possible to achieve an input device that can give a soft tactile sensation to the user when operating the outer cover.

Also, for example, the detector may detect the operation from the user when the outer cover is further pressed while the cushion layer is compression-deformed.

With this configuration, the operation from the user can be detected when the cushion layer is compression-deformed. Accordingly, it is possible to achieve an input device that can give a soft tactile sensation to a user before an operation from the user is detected. Also, in the case where the input device includes a vibration device that provides a stimulus to the haptic sensation of a user while the user is operating the outer cover, it is possible to achieve an input device that can suppress a situation in which vibrations generated by the vibration device are absorbed by the cushion layer.

Also, for example, the detector may include, on a surface of the cushion layer opposite to a surface of the cushion layer on which the outer cover is provided, a sensor film that has light transmission properties and detects an operation position, and the input device may further include: a tabular frame that is provided between the sensor film and the light source and includes through holes at positions corresponding to design elements formed in the design portion; and a protective layer that has light transmission properties and is provided between the sensor film and the tabular frame.

With this configuration, the stress concentratedly applied to the detector when a press operation is performed is reduced by the protective layer. Accordingly, it is possible to achieve a highly reliable input device.

Also, for example, the protective layer may contain light diffusing particles.

With this configuration, the light diffused in advance reaches the cushion layer, and thus brightness variations caused by the cushion layer can be suppressed. Accordingly, it is possible to achieve an input device with a further improved appearance of design elements.

Also, for example, the input device may further include a vibration device that transmits vibrations to the cushion layer, and the vibration device may vibrate in at least a plane direction of the cushion layer.

With this configuration, even when vibrations generated by the vibration device are absorbed in the thickness direction of the cushion layer due to the cushion layer being compression-deformed by a press operation, the vibrations of the vibration device in the plane (horizontal) direction of the cushion layer are transmitted, and thus the vibrations absorbed by the cushion layer can be suppressed. That is, it is possible to achieve an input device that can more reliably transmit the vibrations of the vibration device to the user's finger.

An embodiment described below shows a generic or specific example of the present disclosure. The numerical values, shapes, materials, structural elements, the arrangement and connection of the structural elements, and the like shown in the following embodiment are merely examples, and therefore are not intended to limit the scope of the present disclosure. Also, among the structural elements described in the following embodiment, structural elements not recited in any one of the independent claims are described as arbitrary structural elements. In addition, the diagrams are schematic representations, and thus are not necessarily true to scale. Also, in the diagrams, structural elements that are the same are given the same reference numerals.

Also, in the specification of the present application, the terms that describe the relationship between elements such as “same” and “parallel”, the terms that describe the shape of elements such as “rectangular shape” and “circular shape”, and numerical values are expressions that not only have a strict meaning but also encompass a substantially equal range, for example, a margin of about several percent (or about 10%).

Also, in the diagrams used in the following description of the embodiment, coordinate axes are shown as appropriate. The Z axis indicates a stack direction in which the structural elements of the input device are stacked. Also, the X axis direction and the Y axis direction are directions that are orthogonal to each other on a plane perpendicular to the Z axis direction. Also, in the following embodiment and the like, the expression “when viewed in a plan view” means that the input device is seen from the Z axis direction, and the expression “when viewed in a cross section” means that the input device is seen from a cross section taken along a plane parallel to the stack direction (the Z axis direction).

Also, in the specification of the present application, unless otherwise stated, ordinal numbers such as “first” and “second” are not intended to mean the number or order of structural elements, but are used to prevent the same types of structural elements from being mixed up and distinguish the same types of structural elements from each other.

Embodiment

[1. Overall Configuration of Input Device]

First, an overall configuration of input device1according to the present embodiment will be described with reference toFIGS.1and2.FIG.1is a perspective view showing an example of an external configuration of input device1according to the present embodiment.FIG.2is an exploded perspective view of input device1according to the present embodiment.

As shown inFIG.1, input device1is a device for receiving operations input to control devices included in an object (for example, a vehicle such as an automobile) equipped with input device1. Specifically, input device1receives a push operation (hereinafter also referred to simply as “operation”) performed on the surface of outer cover member10from a user.

In the case where the object is a vehicle, the devices included in the object are onboard devices such as, for example, a car navigation system, an audio device for playing an optical disk, a video playing device, and an air conditioner. However, the devices are not limited thereto.

The object equipped with input device1is not limited a vehicle. It is sufficient that input device1is included in an object that receives user operations, and input device1may be included in, for example, a household appliance or the like.

As shown inFIGS.1and2, input device1includes outer cover member10, main body20, frame member30, vibration device40, plate spring50, chassis60, main substrate70, a pair of upper covers80, and lower cover90.

Outer cover member10is a user interface on which predetermined design elements are displayed and that receives an operation from a user. The user can control the devices included in the vehicle by operating outer cover member10. Outer cover member10is, for example, a tabular member, and is pressed in response to the operation from the user.

The predetermined design elements are, for example, design elements for controlling various types of devices included in the vehicle equipped with input device1.FIG.1shows an example in which a plurality of design elements are displayed on outer cover member10. However, there may be only one design element. Also, outer cover member10includes first regions10ain which design elements are displayed and second region10bin which no design element is displayed.

Each first region10ais a switch portion that functions as a switch in input device1. That is, the switch portion of input device1is a portion in which a design element is displayed. The user can control a device by operating first region10athat corresponds to the device the user wants to control. InFIG.1, as an example, one first region10ais indicated by a dotted frame. However, the shape of first region10ais not limited thereto.

Second region10bis a non-switch portion that does not function as a switch in input device1. Even when the user operates second region10b, none of the devices of the vehicle is controlled. Second region10bincludes a region surrounding each first region10a(a region surrounding a design element) and a region between adjacent first regions10a(a region between design elements). It can also be said that second region10bis a region that is not operated by the user for the purpose of controlling the devices of the vehicle.

Input device1may be installed in a place where the user can unconsciously touch input device1such as an armrest or a console. That is, outer cover member10can be touched by the user even when the user does not need to operate any of the devices. For example, outer cover member10can be touched by the user even when the user places his/her arm on the armrest or the like.

When the user touches outer cover member10without the intention to control any of the devices of the vehicle, the user may touch not only first region10abut also second region10b. For example, second region10bmay be touched by the user at the same time when first region10ais touched. At this time, if the user perceives different tactile sensations (hand touch sensations) between first region10aand second region10b, the user may feel uncomfortable with the tactile sensations. To address this, outer cover member10according to the present embodiment is configured such that the same tactile sensation can be perceived between when first region10ais touched and when second region10bis touched. A configuration of outer cover member10will be described later.

Outer cover member10is fixed to main body20by using, for example, fastening members such as screws15.

Main body20is a frame-shaped member that holds outer cover member10and houses frame member30, vibration device40, plate spring50, chassis60, and main substrate70. In the present embodiment, main body20holds frame member30(for example, frame32) so as to be movable (capable of moving) in a direction (the Z axis direction) in which outer cover member10(for example, outer cover11) and frame member30(for example, frame32shown inFIG.4) are stacked when outer cover member10is operated. Main body20includes frame portion21and a pair of restriction portions22.

Frame portion21is a frame-shaped member that has a size and a thickness (a length in the Z axis direction) sufficient to house frame member30, vibration device40, plate spring50, chassis60, and main substrate70.

The pair of restriction portions22are respectively provided at opposing end portions on one side of opening23of frame portion21(in the present embodiment, on the plus side of the Z axis). Opening23is formed in a region between the pair of restriction portions22. Opening23is a region surrounded by frame portion21and the pair of restriction portions22when viewed in a plan view. Also, opening23may have, for example, the same size as outer cover11of outer cover member10when viewed in a plan view. Opening23is an opening for outer cover member10to be placed.

Main body20holds outer cover member10by sandwiching opposing ends of outer cover member10in the X axis direction by the pair of restriction portions22and the pair of upper covers80. Opening23is closed by, for example, outer cover member10.

Main body20is formed by using a resin, a metal, or the like. However, the material of main body20is not limited thereto. Also, for example, frame portion21and the pair of restriction portions22are integrally formed, but the configuration is not limited thereto.

Frame member30is held by main body20so as to be movable in the direction (the Z axis direction) in which outer cover member10and frame member30are stacked when outer cover member10is operated by the user, and moves in the Z axis direction in response to outer cover member10being operated by the user. Frame member30is held by main body20so as to move in the minus direction of the Z axis irrespective of whether first region10aor second region10bis operated. For example, frame member30moves in the minus direction of the Z axis relative to vibration device40, chassis60, and a push detector (see push detector100shown inFIG.5), which will be described later, as a result of plate spring50that supports frame member30being pressed. Frame member30has, for example, a plate shape, and is held by main body20to be parallel to outer cover member10.

Frame member30is provided between outer cover member10and plate spring50, and is forced toward the plus side of the Z axis by plate spring50. Also, the movement of frame member30in the plus direction of the Z axis is restricted as a result of opposing ends of frame member30in the X axis direction abutting against the pair of restriction portions22of main body20. The initial position of frame member30in the Z axis direction is determined by the pair of restriction portions22and plate spring50. As used herein, the term “initial position” refers to the position of outer cover member10in the Z axis direction when outer cover member10is not operated by the user. A configuration of frame member30will be described later.

Vibration device40is an example of a haptic sensation provider that provides a stimulus to the haptic sensation of the user while the user is operating outer cover member10. Vibration device provides a haptic sensation to the user operating outer cover member10by using, for example, vibrations. Vibration device40is mechanically connected to frame member30(for example, frame32), and provides a haptic sensation to the user operating outer cover member10via frame member30and outer cover member10by using vibrations. As used herein, the expression “mechanically connected” means that vibrations generated by vibration device40are transmitted to frame member30, and frame member30can vibrate in response to receiving the vibrations of vibration device40. In the present embodiment, vibration device40is fixed directly to frame member30.

Vibration device40includes a vibrator that generates vibrations. The vibrator may be, for example, a piezoelectric element that includes a piezoelectric body, or may be a mechanism that electromagnetically operates such as a motor, a solenoid, or a loudspeaker voice coil. Alternatively, the vibrator may be a linear resonant actuator, an artificial muscle, a shape memory actuator, or the like.

Vibration device40is provided on the opposite side of outer cover member10relative to frame member30(on the minus side of the Z axis of frame member30) at a position to overlap frame member30when viewed in a plan view. Vibration device40is provided, for example, between frame member30and chassis60. Vibration device40is provided, for example, in a center portion of frame member30when viewed in a plan view.

The haptic sensation provided to the user is not limited to vibrations, and may be any other sensation or a haptic sensation such as a friction sensation, or a haptic sensation in the sensory nerves such as a current stimulation. As an element that provides a haptic sensation in the sensory nerves, an element that generates an electrostatic friction sensation or the like may be used. Also, the haptic sensation that is provided to the user may be, for example, a haptic sensation that is provided contactlessly. As an element that contactlessly provides a haptic sensation, an element that generates ultrasonic waves or an air flow, or the like may be used.

Plate spring50is an elastic body that is provided on the opposite side of outer cover member10(on the minus side of the Z axis) relative to frame member30, and abuts against frame member to push up frame member30toward outer cover member10(toward the plus side of the Z axis). Also, plate spring50bends in response to outer cover member10being operated, and enables frame member30to move in the minus direction of the Z axis. Plate spring50has, for example, such an elastic force that the vibrations of frame member30caused by vibration device40are not interrupted. However, the elastic force is not limited thereto.

Plate spring50is, for example, a frame-shaped member, and may abut against the peripheral edge of frame member30. Also, opening51is formed in plate spring50for vibration device40to be placed.

Screw holes52are formed in plate spring50. Plate spring50is fixed to chassis60by using, for example, fastening members such as screws53. Furthermore, plate spring50is fixed to frame member30by using, for example, fastening members such as screws54.

Chassis60is a tabular member to which plate spring50is fixed. Opening61is formed in chassis60for vibration device40to be placed. Also, in chassis60, protruding projection portions62are provided on both sides of opening61. Also, screw holes63are formed in chassis60. Chassis60is fixed to main body20by using, for example, fastening members such as screws64.

Main substrate70is a substrate on which various types of electronic components and the like are mounted. For example, a control circuit for implementing a controller (for example, controller110shown inFIG.8) for controlling the structural elements of input device1and the like are mounted on main substrate70. Main substrate70is provided, for example, on the opposite side of outer cover member10(on the minus side of the Z axis) relative to chassis60. Main substrate70is a tabular member, but is not limited thereto.

The pair of upper covers80is a member that covers the opposing ends of outer cover member10in the X axis direction when viewed in a plan view. The pair of upper covers80is, for example, a tabular member. When outer cover member10and the pair of upper covers80are attached to main body20, the pair of upper covers80is flush with the surface of outer cover member10. The shape of the pair of upper covers80is determined as appropriate according to the shape of the pair of restriction portions22when viewed in a plan view. The pair of upper covers80is formed by using, for example, a rubber, but may be formed by using a resin material.

Lower cover90is a cover for closing the other opening of frame portion21of main body20(in the present embodiment, an opening on the minus side of the Z axis). Lower cover90is formed by using a resin, a metal, or the like. However, the material of lower cover90is not limited thereto. Lower cover90may be formed by using the same material as that of main body20. InFIG.2, the illustration of lower cover90is omitted.

In input device1configured as described above, frame member30moves in the minus direction of the Z axis in response to an operation performed on outer cover member10by the user. In input device1, push detector100that is provided on a surface of frame member30on the minus side of the Z axis detects the user operation performed on outer cover member10by detecting the movement of frame member30. Accordingly, push detector100is a part of a detector that detects an operation from a user. Also, vibration device40is mechanically connected to frame member30(for example, frame32), and when push detector100detects the movement of frame member30, vibration device40vibrates to provide the vibrations to the user via frame member30and outer cover member10. As used herein, the expression “to detect the movement of frame member30” means to detect that outer cover member10has been operated.

Vibration device40and the pair of upper covers80are not essential structural elements. Also, as will be described later, in input device1, a tact switch is used as push detector100, and thus only the tact switch may be provided without providing vibration device40. The tact switch includes, for example, a metal dome. The metal dome is a disc spring made of stainless steel or the like, and can provide a haptic sensation to the user. That is, with the metal dome, the tact switch can provide a sense of operation to the user. The tact switch is an example of push detector100. Also, in the present embodiment, a configuration will be described in which a tact switch is used as push detector100and vibration device40is provided. With this configuration, a haptic sensation that cannot be expressed by a metal dome can be provided to the user. Also, in the case where a tact switch that does not include a metal dome is used, by providing vibration device40, a haptic sensation can be provided to the user.

Input device1does not necessarily need to include push detector100. Input device1without push detector100does not have the function (switch function) of detecting a user operation, and functions as a display device that presents a desired display (for example, displays an alert or the like).

[2. Configuration of Outer Cover Member]

Next, the configuration of outer cover member10will be further described with reference toFIG.3.FIG.3is an exploded perspective view of outer cover member10according to the present embodiment.

As shown inFIG.3, outer cover member10includes outer cover11, a design portion, cushion layer13, and frame body14. The design portion includes design sheet12. In the present embodiment, outer cover11, design sheet12, and cushion layer13are stacked in this order. That is, outer cover member10has a configuration in which design sheet12is provided between outer cover11and cushion layer13. Also, outer cover11, design sheet12, and cushion layer13constitute a decorated layer.

Outer cover11is a portion that constitutes the surface of input device1and is touched directly by the user. In the present embodiment, outer cover11has light transmission properties such that the user can visually recognize the design elements. As viewed in a plan view, outer cover11covers both portions of design sheet12in which design elements are provided (for example, light transmission portions12b1) and a portion of design sheet12in which no design element is formed (for example, light blocking portion12b2) from the surface of sheet member12a(from the surface of sheet member12athat is on the plus side of the Z axis). For example, outer cover11covers entire design sheet12when viewed in a plan view. In outer cover11, for example, the portions that cover light transmission portions12b1and the portion that cover light blocking portion12b2are integrally formed. Also, a portion of outer cover11that can be touched by the user has, for example, a plate shape. Also, outer cover11is configured to entirely cover a plurality of first concave portions13aand a plurality of second concave portions13b(seeFIG.5), which will be described later. In the specification of the present application, the expression “to have light transmission properties” means having a light transmission rate relatively higher than that of a portion that has light blocking properties, which will be described later, and it may mean, for example, having a light transmission rate of 10% or more, 30% or more, or 50% or more.

Outer cover11is formed by using, for example, a material that can reproduce a tactile sensation that corresponds to the tactile sensation perceived by the user when touching a portion in which input device1is provided. Outer cover11may be formed by using, for example, a material that corresponds to the material of the portion in which input device1is provided (for example, the material of an interior member). In the case where input device1is embedded in a portion that is made of a leather material (for example, genuine leather), outer cover11may be formed by using, for example, artificial leather that has light transmission properties or the like. Outer cover11may be formed by, for example, impregnating a non-woven fabric with urethane resin, or using a urethane-based thermoplastic elastomer.

Design sheet12is a layer that constitutes the design portion and is provided between outer cover11and frame member30, more specifically, between outer cover11and cushion layer13, and in which predetermined design elements are provided. In the present embodiment, design sheet12includes sheet member12aand design layer12bthat is formed on sheet member12a.

Sheet member12ais a base member on which design layer12bis formed, and may be, for example, a tabular member that has light transmission properties. Sheet member12ais formed by using a material that has light transmission properties. The material of sheet member12amay be the same material as that of cushion layer13, or may be different from that of cushion layer13. Also, sheet member12amay be formed by using a material that is more flexible than outer cover11and has good printability. Alternatively, sheet member12amay be formed by using a material that has a repulsion force smaller than that of outer cover11. Sheet member12amay contain a rubber that has light transmission properties. In the present embodiment, sheet member12ais a silicone rubber sheet made of a transparent silicone rubber. When a silicone rubber sheet is used as sheet member12a, design layer12bcan be easily formed on sheet member12athrough printing. From the viewpoint of suppressing a reduction in the printability, sheet member12amay be poreless. In the specification of the present application, the term “to be transparent” means having light transmission properties and having no color. Also, the term “to be transparent” may mean, for example, having a light transmission rate of 50% or more, or 70% or more.

From the viewpoint of causing sheet member12ato easily bend locally when outer cover member10is operated, sheet member12amay be thin (i.e., the length of sheet member12ain the Z axis direction, or in other words, the thickness of sheet member12amay be small). Sheet member12amay be thinner than outer cover11. The thickness of sheet member12amay be, for example, preferably 2.0 mm or less, more preferably 1.0 mm or less, and even more preferably 0.5 mm or less. In the case where input device1is provided in a portion that is made of genuine leather, with thin sheet member12a, input device1can give, to the user, a tactile sensation close to the tactile sensation as if pressing genuine leather when the user operates outer cover member10. Also, with thin sheet member12a, input device1can suppress a situation in which the elastic force of sheet member12ais exerted. The thickness of sheet member12ais not limited to the above-described range, and may be determined as appropriate according to the material or the like.

Sheet member12ais formed by integrally forming, for example, portions in which light transmission portions12b1are formed and a portion in which light blocking portion12b2is formed.

Design layer12bincludes a print layer on which design elements are provided, the print layer being formed on sheet member12athrough printing. Design layer12bis formed on the surface of sheet member12a, but may be formed on the back surface of sheet member12a(the surface of sheet member12athat is on the minus side of the Z axis).

Design layer12bincludes: light transmission portions12b1that allow light emitted from light source33(see light source33shown inFIG.4) included in frame member30to pass therethrough; and light blocking portion12b2that blocks the light emitted from light source33. In design layer12b, design elements are displayed by the light that has passed through light transmission portions12b1. InFIG.3, for the sake of ease of understanding, light transmission portions12b1are shown in black, and light blocking portion12b2is shown in white. However, actually, light transmission portions12b1are transparent, and light blocking portion12b2is colored in black excluding light transmission portions12b1.

Each light transmission portion12b1forms first region10a, and light blocking portion12b2forms second region10b. It can also be said that, for example, first region10ais a light transmission region in which a design element is formed, the light transmission region being formed on sheet member12athrough printing, and second region10bis a light blocking region formed on sheet member12athrough printing. The light transmission region may be, for example, a region in which a print material for forming the light blocking region is not printed. Each light transmission portion12b1is an example of a first portion, and light blocking portion12b2is an example of a second portion.

The configuration of design layer12bis not limited to the configuration described above. For example, design layer12bmay be formed by printing (painting) the entire surface of sheet member12ain black and removing the black paint in portions corresponding to light transmission portions12b1through laser cutting. Accordingly, in the present embodiment, the term “printing” encompasses not only printing the light blocking region on sheet member12a, but also painting the entire surface of sheet member12ain black.

Design sheet12covers first concave portions13aand second concave portions13b. For example, design sheet12entirely covers a plurality of first concave portions13aand a plurality of second concave portions13b. For example, each of the design elements formed in design sheet12is provided to be superimposed on two or more first concave portions13aand two or more second concave portions13bwhen viewed in a plan view.

The surface of design sheet12that is on the minus side of the Z axis (or in other words, the surface of design sheet12that is brought into contact with second concave portions13bof cushion layer13) may be covered with a coating for improving slidability on cushion layer13. As used herein, the expression “to improve slidability” means to make design sheet12and cushion layer13unlikely to slide. The coating may be, for example, a fluorine coating, but is not limited thereto.

From the viewpoint of suppressing a situation in which design sheet12bites into first concave portions13aof cushion layer13, design sheet12(for example, a silicone rubber) may have such a hardness that design sheet12does not bite into first concave portions13aof cushion layer13. For example, design sheet12is harder than cushion layer13. The silicone rubber may have a hardness of, for example, 40 degrees or more.

Cushion layer13is a layer with cushioning properties that is provided to give a soft tactile sensation to the user when operating outer cover member10. Cushion layer13is provided on the back surface of design sheet12that is opposite to outer cover11(on the minus side of the Z axis).

Cushion layer13covers both the portions of design sheet12in which design elements are provided (for example, light transmission portions12b1) and a portion of design sheet12in which no design element is formed (for example, light blocking portion12b2) from the back surface of sheet member12awhen viewed in a plan view. Also, cushion layer13has light transmission properties to guide light to light transmission portions12b1. Cushion layer13covers, for example, entire design sheet12when viewed in a plan view. Cushion layer13has, for example, a plate shape. Cushion layer13is formed by integrally forming, for example, portions that cover light transmission portions12b1and a portion that covers light blocking portion12b2.

Cushion layer13has cushioning properties higher than those of sheet member12a. Details will be described with reference toFIG.5. Cushion layer13according to the present embodiment has a shape that is compression-deformable in response to outer cover11being pressed. Cushion layer13is formed by using a material (for example, a silicone rubber) that has light transmission properties. In the present embodiment, cushion layer13is made of a transparent silicone rubber. With this configuration, by molding the silicone rubber, cushion layer13can be produced easily by using an ordinary material. Also, because cushion layer13is transparent, light emitted from light source33can be transmitted without the color of the light being changed. Cushion layer13may be formed by using a urethane-based thermoplastic elastomer, a urethane rubber, or the like.

Even when cushion layer13is made of a silicone rubber, cushion layer13is formed in a compression-deformable shape, and thus cushion layer13easily collapses (the thickness of cushion layer13is partially reduced) in response to outer cover11being pressed. Accordingly, cushion layer13enables the user to easily feel a soft tactile sensation. Also, from the viewpoint of providing a softer tactile sensation to the user, the hardness of the silicone rubber may be, for example, A40 or less.

Also, from the viewpoint of enabling the user to easily feel a soft tactile sensation when the user operates outer cover member10, cushion layer13has a large height (the length of cushion layer13in the Z axis direction). Cushion layer13may have, for example, a height larger than that of design sheet12(for example, sheet member12a). Also, cushion layer13may have a height larger than that of outer cover11. The height relationship of cushion layer13with respect to outer cover11and design sheet12is not limited thereto, and may be determined as appropriate according to the material or the like.

In the present embodiment, cushion layer13is formed without using a foamable resin or the like. A cushion material obtained by foaming a foamable resin may internally include voids that have different sizes, different shapes, and the like. Accordingly, it may be difficult to maintain the in-plane operational load at a constant level. That is, with a cushion material obtained by foaming a foamable resin, the operability is more likely to vary from operational position to operational position in outer cover11, as compared with a silicone rubber. On the other hand, in the present embodiment, cushion layer13is formed using a silicone rubber, and it is therefore possible to easily maintain the in-plane operational load at a constant level. Accordingly, input device1with an improved operability can be achieved as compared with the case where the cushion layer is formed using a foamable resin or the like.

As described above, outer cover11and cushion layer13are each formed to extend over light transmission portions12b1and light blocking portion12b2when viewed in a plan view. It can also be said that outer cover11and cushion layer13are each formed to extend over first regions10aand second region10bwhen viewed in a plan view. It can also be said that outer cover11and cushion layer13are each formed to extend over the switch portions and the non-switch portion when viewed in a plan view.

In the present embodiment, outer cover11and cushion layer13cover entire design sheet12when viewed in a plan view. For example, outer cover11, design sheet12, and cushion layer13may have the same size when viewed in a plan view. Outer cover member10has a three-layer structure that includes outer cover11, design sheet12, and cushion layer13in a region that can be touched by the user when viewed in a plan view. For example, outer cover member10is configured such that a cross-sectional structure of first region10aand a cross-sectional structure of second region10bhave a three-layer structure that includes outer cover11, design sheet12, and cushion layer13, and, in each layer, a portion corresponding to first region10aand a portion corresponding to second region10bare made of the same material.

Also, outer cover11, design sheet12, and cushion layer13are stacked, for example, in contact with each other. Also, outer cover11, design sheet12, and cushion layer13are held by main body20such that, for example, their tabular portions are parallel to each other.

Outer cover11, design sheet12, and cushion layer13are in a rectangular shape when viewed in a plan view, but there is no particular limitation on the shape of outer cover11, design sheet12, and cushion layer13. Outer cover11, design sheet12, and cushion layer13may be in a square shape, a circular shape, an L shape, or the like. Also, outer cover11and cushion layer13do not necessarily need to cover entire design sheet12when viewed in a plan view, and may cover at least one first region10aand second region10b.

In the foregoing description, an example was described in which design layer12bis formed on sheet member12a. However, the configuration is not limited thereto. In the case where outer cover11is formed by using a material capable of forming design layer12bthrough printing, design layer12bmay be formed directly on outer cover11through printing. Design layer12bmay be formed on the surface of outer cover11(the surface of outer cover11that is on the plus side of the Z axis). In the case where outer cover11has light transmission properties, design layer12bmay be formed on the back surface of outer cover11(the surface of outer cover11that is on the minus side of the Z axis).

In the case where design layer12bis formed on outer cover11, outer cover member10need not include sheet member12a. That is, the design portion may be formed by design layer12bformed (for example, printed) on outer cover11. Also, for example, in the case where design layer12bis formed on outer cover11, outer cover11and cushion layer13may be directly stacked.

Frame body14is a frame-shaped member that has rigidity, and supports the outer edge portions of outer cover11, design sheet12, and cushion layer13.

InFIG.3, the illustration of fixing members, such as screw15, for fixing the structural elements is omitted.

[3. Configuration of Frame Member]

Next, the configuration of frame member30will be further described with reference toFIG.4.FIG.4is an exploded perspective view of frame member30according to the present embodiment. InFIG.4, vibration device40is also illustrated.

As shown inFIG.4, frame member30includes sensor film31, frame32, and light source33. Frame member30is provided to face outer cover member10. Also, vibration device40is provided on a surface of light source33that is opposite to outer cover11(the surface of light source33that is on the minus side of the Z axis).

Sensor film31is a part of a detector that detects an operation from the user. Specifically, sensor film31is a sensor that is provided on a surface of cushion layer13that is opposite to outer cover11(the surface of cushion layer13that is on the minus side of the Z axis) to detect an operation position in outer cover11operated (pressed) by the user. Sensor film31is provided between cushion layer13and frame32. In the present embodiment, sensor film31is an electrostatic capacitance type sensor film (electrostatic sensor film) that has light transmission properties. Sensor film31covers both light transmission portions12b1of design sheet12in which design elements are provided and light blocking portion12b2of design sheet12in which no design element is formed from the back surface of sheet member12a(from the surface of sheet member12athat is on the minus side of the Z axis) when viewed in a plan view. It can also be said that sensor film31is formed to extend over light transmission portions12b1and light blocking portion12b2when viewed in a plan view. Sensor film31covers, for example, entire design sheet12when viewed in a plan view. Sensor film31is formed by integrally forming, for example, portions that cover light transmission portions12b1and a portion that covers light blocking portion12b2.

Sensor film31includes tabular substrate31a, sensor electrodes31bthat are provided on substrate31a, and flexible substrate portion31cfor connecting to main substrate70. In the present embodiment, substrate31aand sensor electrodes31bhave light transmission properties. That is, in the present embodiment, substrate31ais a transparent substrate, and sensor electrodes31bare transparent electrodes. It can also be said that sensor electrodes31bare electrostatic sensor electrodes.

Substrate31ais a film on which sensor electrodes31bare formed. The film may be, for example, a PET (polyethylene terephthalate) film. Substrate31adoes not necessarily need to be a film, and may be a transparent substrate.

Sensor electrodes31bare provided correspondingly to the plurality of design elements formed in design sheet12. For example, sensor electrodes31bare provided at positions that face the plurality of design elements, respectively. Each sensor electrode31bis provided to at least partially overlap a corresponding one of the design elements when viewed in a plan view. For example, each sensor electrode31bis provided to incorporate a corresponding one of the design elements when viewed in a plan view. For example, sensor electrodes31bare provided in one-to-one correspondence with the design elements.

The configuration is not limited to the above-described example in which a plurality of sensor electrodes31bare provided. For example, in the case where there is only one design element, only one sensor electrode31bmay be provided.

For example, each first region10amay be a region in which sensor electrode31bis provided when viewed in a plan view. Also, for example, second region10bmay be a region in which sensor electrode31bis not provided when viewed in a plan view.

Sensor film31does not necessarily need to be an electrostatic capacitance type sensor film, and may have a configuration that detects an operation position in outer cover member10operated by the user, by using an ultrasonic method, an electromagnetic induction method, or any other method.

Flexible substrate portion31cis a substrate for outputting detection results obtained from sensor electrodes31bto main substrate70. Sensor film31and main substrate70are electrically connected as a result of one end of flexible substrate portion31cbeing connected to a connector or the like of main substrate70.

Sensor film31may further include an electrostatic IC (integrated circuit) (not shown) that is a processor that detects a contact position touched by a user's finger based on changes in electrostatic capacitance caused by the user touching outer cover11. For example, the electrostatic IC outputs, to controller110, position information indicating the position touched by the user's finger.

Frame32moves in the minus direction of the Z axis by as a result of being pressed in the minus direction of the Z axis by outer cover member10operated by the user. Frame32is a tabular member provided on a side (on the minus side of the Z axis) opposite to outer cover11relative to cushion layer13. In the present embodiment, frame32is provided between sensor film31and light source33. Frame32has rigidity. Also, in the present embodiment, frame32has light transmission properties.

Frame32is provided to cover outer cover11, design sheet12, and cushion layer13when viewed in a plan view. Frame32is formed to extend over first regions10aand second region10bwhen viewed in a plan view. In the present embodiment, frame32covers the entire tabular portions (the portions to be touched by the user) of outer cover11, design sheet12, and cushion layer13when viewed in a plan view. With this configuration, frame32moves in the minus direction of the Z axis in the same manner irrespective of whether first region10aor second region10bis operated by the user. That is, frame32also moves when second region10bis operated by the user. Frame32is held by main body20to be, for example, parallel to cushion layer13.

In frame32, through holes32athat are spaces for the light emitted from light source33to pass through are formed. Through holes32aare provided, for example, correspondingly to a plurality of light emitting elements33bincluded in light source33. It can also be said that through holes32aare provided, for example, correspondingly to the design elements formed in design sheet12. Also, the light is transmitted via through holes32a, and thus it can be said that frame32has light transmission properties.

In the present embodiment, each of the design elements formed in design sheet12is smaller than a fingertip, and thus through holes32aare also sized to be smaller than a fingertip as with the design elements. Accordingly, a situation is unlikely to occur in which the user has difficulty in pressing due to outer cover member being bent when the user performs a press operation. However, in the case where each of the design elements and through holes32ais sized to be larger than a fingertip, and outer cover member10is bent when the user performs a press operation, a light guiding member (not shown) for guiding the light emitted from each light emitting element33bmay be formed for each through hole32a. That is, frame32may include light guiding members in portions of frame32that face the design elements and light source33(for example, light emitting elements33b). The light guiding members are not limited to the configuration described above, and may also be used when the design elements are sized to be smaller than a fingertip.

Also, through holes32ado not necessarily need to be formed in frame32, and through holes32amay not need to be formed in frame32. In this case, for example, frame32is formed by two-color molding a light transmission resin and a light blocking resin.

Also, frame32includes end portion32bthat is a projection portion that protrudes in the minus side of the X axis and end portion32cthat is a projection portion that protrudes in the plus side of the X axis. End portions32band32care portions that abut against, for example, plate spring50.

Sensor film31and light source33are fixed to frame32by using, for example, fastening members such as screws.

Light source33is provided on a surface of frame32opposite to cushion layer13(on the minus side of the Z axis) to illuminate the design elements. Light source33includes substrate33aand a plurality of light emitting elements33b.

Substrate33ais a tabular member on which the plurality of light emitting elements33bare provided. Substrate33ais a rigid substrate, but may be a flexible substrate.

Light emitting elements33bemit light for displaying the design elements. Light emitting elements33bare provided correspondingly to the plurality of design elements. Light emitting elements33bare provided, for example, at positions in substrate33athat face the plurality of design elements. Light emitting elements33bare, for example, LEDs (light emitting diodes), but are not limited thereto.

The plurality of light emitting elements33bmay emit light beams of different colors (for example, colors corresponding to the design elements) or may emit light beams of one color (for example, white).

Screws34are fastening members for fixing substrate33ato frame32.

In the present embodiment, vibration device40is fixed to frame member30together with substrate33a. Accordingly, substrate33aand vibration device40are provided to come into direct contact with frame member30irrespective of whether frame member30moves in the minus direction of the Z axis.

When outer cover member10is operated by the user, frame member30configured as described above moves in the Z axis direction, for example, together with sensor film31, frame32, and light source33described above.

Sensor film31is not an essential structural element.

[4. Cross-Sectional Structure of Input Device]

Next, a cross-sectional structure of input device1will be further described with reference toFIG.5.FIG.5is a cross-sectional view of input device1according to the present embodiment.FIG.5is a cross-sectional view of input device1in a state in which outer cover member10is not operated by the user, or in other words, the initial state.FIG.5shows a cross-sectional view of input device1taken along the YZ plane that is parallel to the Z axis direction.

As shown inFIG.5, in input device1, outer cover member10(see, for example,FIG.3), frame32, light source33, plate spring50, and chassis60are held parallel to each other in this order from the front surface side (from the plus side of the Z axis). Outer cover member10is integrally formed to extend from an end portion on the plus side of the X axis to an end portion on the minus side of the X axis. That is, in each of first regions10aand second region10b(see, for example,FIG.1), outer cover member10has the same structure and is formed using the same material.

The light emitted from light emitting elements33bof light source33passes through through holes32aand outer cover member and is emitted to the outside of input device1. With this configuration, input device1enables the user to visually recognize indications corresponding to the design elements formed on design sheet12.

Also, input device1may further include, on the opposite side of outer cover member10(on the minus side of the Z axis) relative to frame member30, push detector100for detecting an operation of the user performed on outer cover member10. Push detector100may be, for example, a tact switch. Push detector100is provided, for example, at an end portion of substrate33ain the X axis direction, but the configuration is not limited thereto. Push detector100is mechanically connected to frame32. As used herein, the expression “push detector100is mechanically connected to frame32” means that push detector100can detect the movement of frame32in the minus direction of the Z axis.

Push detector100is provided on the back surface side (on the minus side of the Z axis) of cushion layer13, and detects an operation (for example, a press operation) from the user. Push detector100is configured to detect an operation from the user when, for example, outer cover11is further pressed while cushion layer13is compression-deformed. Push detector100is configured to detect an operation from the user when, for example, a predetermined load or more is applied to outer cover11. For example, push detector100is configured to, when outer cover11is further pressed while cushion layer13is compression-deformed, detect the pressing operation. The expression “while cushion layer13is compression-deformed” means a state in which cushion layer13is compression-deformed to a predetermined degree or more, and may encompass a state in which, for example, cushion layer13is compression-deformed to a degree that does not exceed the predetermined degree or cushion layer13is less compression-deformed from the initial state.

Push detector100may be a load sensor that detects the load applied to outer cover member10based on the movement of frame32in the minus direction of the Z axis as a result of outer cover member10being operated. There is no particular limitation on the load sensor as long as it is possible to detect the load applied to outer cover member10. The load sensor may be, for example, a piezoelectric sensor. The load sensor includes, for example, a piezoelectric element. Push detector100may be, for example, a stroke sensor that detects the load applied to outer cover member10as the amount of displacement of frame member30(for example, frame32). The stroke sensor detects the amount of displacement of frame member30as a stroke amount by using, for example, an optical sensor, a radio wave sensor, a sonic sensor, or the like. The stroke sensor can detect a small stroke amount as small as, for example, about 0.1 mm. The stroke sensor may determine that the user has operated outer cover member10when the stroke sensor detects a small stroke amount as small as, for example, about 0.1 mm. The tact switch used in the present embodiment can also detect a stroke amount of about 0.1 mm to about 0.2 mm. Push detector100outputs the detection result to controller110, which will be described later.

Push detector100may be a contact type push detector or a contactless type push detector. Push detector100may be an electrostatic capacitance type push detector or a mechanical push detector. In the case where input device1includes a switch such as a tact switch, sensors such as the load sensor described above may be omitted. Push detector100is an example of a detector.

Also, when viewed in a cross section taken along a plane parallel to the stack direction (the Z axis direction) in which outer cover11and design sheet12are stacked, cushion layer13is formed to have a plurality of concave portions that are in a convex shape in the stack direction and a concave shape on the opposite side of the convex shape. Specifically, when viewed in a cross section taken along a plane parallel to the stack direction of outer cover11and design sheet12, cushion layer13is formed to have a plurality of first concave portions13aand a plurality of second concave portions13b, the plurality of first concave portions13abeing in a convex shape in a first orientation (from the plus side of the Z axis toward the minus side of the Z axis) in the stack direction relative to a center line (seeFIG.6) that is orthogonal to the stack direction and a concave shape on the opposite side of the convex shape in the first orientation, and the plurality of second concave portions13bbeing connected to first concave portion13aand being in a convex shape in a second orientation (from the minus side of the Z axis toward the plus side of the Z axis) that is opposite to the first orientation in the stack direction relative to the center line and a concave shape on the opposite side of the convex shape in the second orientation. Also, cushion layer13also includes at least either first concave portions13aor second concave portions13b, for example, above frame body14(on the plus side of the Z axis).

The center line is an imaginary line that extends through the center of height A of cushion layer13(seeFIG.6) and is parallel to the Y axis direction, and is an example of a reference line. The reference line does not necessarily need to extend through the center of height A, and may be an imaginary line that extends through any position of height A and is parallel to the Y axis direction. Also, the reference line does not necessarily need to be orthogonal to the stack direction, and may be parallel to a direction that intersects the stack direction when viewed in a cross section.

In cushion layer13, a plurality of first concave portions13aare arranged spaced apart from each other on the first orientation side relative to the center line, and a plurality of second concave portions13bare arranged spaced apart from each other on the second orientation side relative to the center line. In cushion layer13, first concave portions13aand second concave portions13bare alternately and successively formed when viewed in a cross section taken along the YZ plane. That is, first concave portions13aand second concave portions13bare provided alternately in the Y axis direction (an example of a first direction). For example, the plurality of first concave portions13aand the plurality of second concave portions13bform a corrugated shape (corrugated tabular shape) when viewed in a cross section taken along the YZ plane. For example, one second concave portion13band one first concave portion13athat is connected to the one second concave portion13bform the shape of a sine curve with a single frequency about the reference line when viewed in a cross section taken along the YZ plane. The corrugated shape refers to the shape of a sine curve, but may be, for example, a triangular corrugated shape (a zigzag shape) or the like.

From the viewpoint of providing, for example, a soft tactile sensation to the user, cushion layer13may be thin. For example, cushion layer13may be thinner than design sheet12(for example, sheet member12a). However, the configuration is not limited thereto.

In cushion layer13configured as described above, spaces13care formed between cushion layer13and design sheet12, and spaces13dare formed between cushion layer13and sensor film31. As a result of spaces13cand13dbeing formed as described above, cushion layer13can be easily compression-deformed in response to outer cover11being pressed. With this configuration, input device1enables the user to easily feel a soft tactile sensation.

All of the plurality of spaces13cformed in cushion layer13are entirely covered by design sheet12, and all of the plurality of spaces13dformed in cushion layer13are entirely covered by sensor film31.

Cushion layer13(first concave portions13aand second concave portions13b) is, for example, integrally formed. Cushion layer13is produced by, for example, molding a transparent silicone rubber. Thus, cushion layer13according to the present embodiment is a rubber molded article with a convex-concave cross section. However, the method for producing cushion layer13is not limited thereto.

Here, the configuration of cushion layer13will be further described with reference toFIGS.6and7.FIG.6is a cross-sectional perspective view of cushion layer13according to the present embodiment.FIG.7is a perspective view of cushion layer13according to the present embodiment.FIG.6is a perspective view of cushion layer13taken along the YZ plane when viewed from the X axis direction toward the plus side of the Z axis.

As shown inFIGS.6and7, in cushion layer13, the plurality of first concave portions13aand the plurality of second concave portions13bextend in the X axis direction when input device1is viewed in a plan view. It can be said that, in cushion layer13, first concave portions13aand second concave portions13bare alternately (for example, successively) provided in the Y axis direction, and the plurality of first concave portions13aand the plurality of second concave portions13bthat are alternately provided in the Y axis direction extend in a direction (an example of a second direction) that intersects the Y axis direction when input device1is viewed in a plan view. The direction that intersects the Y axis direction is, for example, the X axis direction that is orthogonal to the Y axis direction, but is not limited thereto.

The plurality of first concave portions13aand the plurality of second concave portions13bextend in a direction parallel to each other. In other words, in cushion layer13, a plurality of spaces13cand a plurality of spaces13dextend in a direction is parallel to each other. Cushion layer13is a corrugated member (for example, a rubber member formed in a corrugated shape).

In cushion layer13, for example, design sheet12comes into line contact with ridges13b1of second concave portions13b, and sensor film31comes into line contact with ridges13a1of first concave portions13a. As used herein, the term “line contact” means that design sheet12or sensor film31contacts ridges13b1or13a1in an elongated linear manner when viewed in a plan view, and is also intended to mean that design sheet12or sensor film31contacts ridges13b1or13a1that have been elastically deformed and flattened, in addition to contacting ridges13b1or13a1in the linear manner.

Ridges13a1and13b1are curved when viewed in a cross section.

From the viewpoint of suppressing a situation in which the user feels uncomfortable, width (pitch) W between adjacent second concave portions13bmay be small. Width W may be, for example, 4 mm or less, preferably 3 mm or less, and more preferably 2 mm or less. Also, from the viewpoint of enabling the user to easily feel a soft tactile sensation when the user operates outer cover member10, height A of cushion layer13may be large. Height A may be, for example, 2 mm or more, preferably 3 mm or more, and more preferably 4 mm or more. Also, width W and height A may be the same length.

When outer cover member10configured as described above is operated by the user, outer cover11and design sheet12are bent in the minus side of the Z axis, and cushion layer13is compressed in the minus side of the Z axis. That is, outer cover member10is locally deformed when outer cover member10is operated by the user. As a result of cushion layer13being compressed, it is possible to cause the user to feel a soft tactile sensation. Outer cover member10includes cushion layer13integrally formed over first regions10aand second region10b, and thus, irrespective of whether first region10aor second region10bis operated (for example, touched) by the user, it is possible to cause the user to feel the same soft tactile sensation.

Also, when outer cover11is pressed, cushion layer13is bent such that portions (slope portions) between ridges13a1and13b1that have been pressed are flattened toward the outside when viewed in a plan view, as a result of which, cushion layer13is compression-deformed such that cushion layer13becomes thin in thickness. It can also be said that cushion layer13undergoes buckling deformation. Because the thickness of cushion layer13becomes partially thin (the height is reduced), the user can press outer cover11with a pressing force smaller than that required when the thickness of cushion layer13becomes entirely thin. That is, as a result of input device1including cushion layer13, the operability can be improved in addition to enabling the user to feel a soft tactile sensation.

Also, because frame member30is integrally formed over first regions10aand second region10b, and has rigidity, frame member moves in the minus direction of the Z axis without being deformed irrespective of whether first region10aor second region10bis operated (for example, touched) by the user. Accordingly, with frame member30, the user is less likely to feel the difference in tactile sensation between when frame member30moves and when frame member30does not move, as compared with a configuration in which, for example, frame member30does not move when second region10bis operated.

With the configuration described above, input device1can provide the same soft tactile sensation to the user no matter where in outer cover member10the user touches (presses). It is therefore possible to suppress a situation in which the user feels uncomfortable with the tactile sensation. For example, in the case where input device1is provided in a place where the user can unconsciously touch such as an armrest, it is possible to suppress a situation in which the user feels uncomfortable with the tactile sensation. For example, input device1can provide the same tactile sensation to the user no matter where in outer cover member10the user touches when light source33is in a non-illuminated state. Accordingly, it is possible to suppress a situation in which the user feels uncomfortable with the tactile sensation. That is, even when the user touches outer cover member10without the intention to operate any of the devices of the vehicle, the user can feel the same tactile sensation no matter where in outer cover member10the user touches.

Also, cushion layer13is compression-deformed by, for example, the user operating outer cover member10. That is, cushion layer13is compressed when vibrations are generated by vibration device40. Accordingly, with input device1, the vibrations of vibration device40are unlikely to be absorbed by cushion layer13, and it is therefore possible to effectively transmit the tactile sensation of vibration device40to the user (user's finger). Also, in the case where input device1includes a tact switch, a click sensation generated by the tact switch is unlikely to be absorbed by cushion layer13, and thus input device1can effectively transmit the click sensation to the user. That is, input device1can reduce uncomfortableness of the user with the tactile sensation, without compromising the haptic sensation provided to the user.

Also, cushion layer13is formed to have the plurality of first concave portions13aand the plurality of second concave portions13bdescribed above when viewed in a cross section taken along the YZ plane. For example, the plurality of first concave portions13aand the plurality of second concave portions13bform a corrugated shape. Thus, the slope angle of each portion (slope portion) between ridges13a1and13b1of cushion layer13relative to the center line (reference line) can be reduced (made gentle), and a difference is unlikely to occur in brightness between the light that passes through ridges13a1and13b1of cushion layer13and the light that passes through the portions (slope portions) between ridges13a1and13b1of cushion layer13. Accordingly, with cushion layer13, it is possible to suppress the occurrence of brightness variations caused by the shape of cushion layer13.

[5. Functional Configuration of Input Device]

Next, a functional configuration of input device1will be described with reference toFIG.8.FIG.8is a block diagram showing the functional configuration of input device1according to the present embodiment.

As shown inFIG.8, input device1includes, as functional structural elements, sensor film31, light source33, vibration device40, push detector100, and controller110.

Controller110is a control device that controls the structural elements of input device1. Controller110controls light source33to emit light to display the design elements. Also, controller110determines, based on position information from sensor film31, which design element has been operated by the user, and performs control processing that corresponds to the design element operated by the user. Controller110may perform the processing performed by the electrostatic IC described above.

Also, when controller110acquires a detection result indicating that the user has operated outer cover member10from push detector100, controller110outputs control information for causing vibration device40to vibrate. For example, controller110acquires a detection result indicating that the user has operated outer cover member10from push detector100, and then acquires the position (the design element) operated by the user based on the position information from sensor film31. Then, controller110outputs a control signal that corresponds to the design element operated by the user to the outside. Furthermore, controller110may cause vibration device40to vibrate in a manner (for example, frequency, vibration intensity, and the like) that corresponds to the design element operated by the user.

When second region10bis operated by the user, controller110acquires a detection result from push detector100, but does not acquire position information from sensor film31. In this case, controller110does not output control information for causing vibration device40to vibrate. That is, controller110does not cause vibration device40to vibrate. Controller110outputs control information for causing vibration device40to vibrate when, for example, controller110acquires both position information from sensor film31and a detection result from push detector100.

Controller110may be implemented by using, for example, a processor that executes a program for controlling the structural elements and a memory in which the program is stored, or may be implemented by using a dedicated circuit. Controller110may be implemented by using, for example, an ECU (Electronic Control Unit).

VARIATIONS OF THE EMBODIMENT

Hereinafter, variations of input device1according to the embodiment will be described with reference toFIGS.9to16. In the variations given below, differences from the embodiment will be mainly described, and thus the same or similar description as that of the embodiment will be omitted or simplified. Also, in each of the variations given below, the configuration of the cushion layer is changed from that of the embodiment.

(Variation 1 of the Embodiment)

In the embodiment given above, an example was described in which the cushion layer is configured by using one corrugated member. However, the configuration is not limited thereto. The cushion layer may be configured by using a member in which convex portions and concave portions are two-dimensionally formed. Input device1according to the present variation will be described with reference toFIGS.9to10B.FIG.9is a perspective view of cushion layer113according to the present variation.FIG.10Ais a cross-sectional view of cushion layer113according to the present variation taken along the section line Xa-Xa shown inFIG.9.FIG.10Bis a cross-sectional view of cushion layer113according to the present variation taken along the section line Xb-Xb shown inFIG.9.FIG.10Ais a cross-sectional view of cushion layer113taken along a second row of second corrugation113bin which first concave portions113b1and second concave portions113b2of second corrugation113bare arranged.FIG.10Bis a cross-sectional view of cushion layer113taken along a first row of first corrugation113ain which first concave portions113a1and second concave portions113a2of first corrugation113aare arranged.

As shown inFIGS.9to10B, cushion layer113includes: a plurality of first concave portions113a1and a plurality of second concave portions113a2that are two-dimensionally arranged; and a plurality of first concave portions113b1and a plurality of second concave portions113b2that are two-dimensionally arranged. In the present variation, a first row of first corrugation113ain which first concave portions113a1and second concave portions113a2of first corrugation113aare successively arranged (seeFIG.10B) and a second row of second corrugation113bin which first concave portions113b1and second concave portions113b2of second corrugation113bare successively arranged (seeFIG.10A) are alternately provided in each of the X axis direction and the Y axis direction. For example, first corrugation113aand second corrugation113bare arranged such that first concave portions113a1of first corrugation113aand second concave portions113b2of second corrugation113bare provided in a zigzag shape in each of the X axis direction and the Y axis direction when viewed in a plan view. Cushion layer113has a corrugated shape when viewed from the X axis direction and also when viewed from the Y axis direction. First concave portions113a1and113b1and second concave portions113a2and113b2are an example of a plurality of concave portions. First concave portions113a1and113b1, and second concave portions113a2and113b2are in a circular shape when viewed in a plan view, but may be in a polygonal shape such as, for example, a quadrilateral shape or a hexagonal shape, or any other shape when viewed in a plan view.

As shown inFIG.10A, when viewed in a cross section taken along a plane (for example, the YZ plane) parallel to the stack direction, second corrugation113bincludes first concave portions113b1and second concave portions113b2. First concave portions113b1are in a convex shape in a first orientation (from the plus side of the Z axis toward the minus side of the Z axis) in the stack direction relative to a second center line that is orthogonal to the stack direction and a concave shape on the opposite side of the convex shape in the first orientation. Second concave portions113b2are connected to first concave portion113b1and are in a convex shape in a second orientation (from the minus side of the Z axis toward the plus side of the Z axis) that is opposite to the first orientation in the stack direction relative to the second center line and a concave shape on the opposite side of the convex shape in the second orientation.

In cushion layer113, the plurality of first concave portions113b1are arranged spaced apart from each other on the first orientation side relative to the second center line, and the plurality of second concave portions113b2are arranged spaced apart from each other on the second orientation side relative to the second center line. In cushion layer113, first concave portions113b1and second concave portions113b2are alternately and successively formed when viewed in a cross section taken along the YZ plane. That is, first concave portions113b1and second concave portions113b2are alternately provided in the Y axis direction (an example of a first direction). For example, first concave portions113b1and second concave portions113b2that are alternately provided form a corrugated shape (corrugated tabular shape) when viewed in a cross section taken along the YZ plane.

The second center line is an imaginary line that extends through the center of second corrugation113bof cushion layer113in the Z axis direction and is parallel to the Y axis direction, and is an example of a reference line.

The portions between ridges113b11and113b22are merely an example of slope portions. The length of ridges113b11and113b22in the Z axis direction is, for example, A/2, but is not limited thereto.

A dotted line shown inFIG.10Ais a straight line or a plane that connects the upper bottoms of first concave portions113b1.

FIG.10Ashows a cross section taken along a section line extending in the Y axis direction, but cushion layer113also has the same shape when viewed in a cross section taken along a section line extending in the X axis direction.

As shown inFIG.10B, when viewed in a cross section taken along a plane (for example, the YZ plane) parallel to the stack direction, first corrugation113aincludes first concave portions113a1and second concave portions113a2. First concave portions113a1are in a convex shape in a first orientation (from the plus side of the Z axis toward the minus side of the Z axis) in the stack direction relative to a first center line that is orthogonal to the stack direction and a concave shape on the opposite side of the convex shape in the first orientation. Second concave portions113a2are connected to first concave portion113a1and are in a convex shape in a second orientation (from the minus side of the Z axis toward the plus side of the Z axis) that is opposite to the first orientation in the stack direction relative to the first center line and a concave shape on the opposite side of the convex shape in the second orientation.

In cushion layer113, the plurality of first concave portions113a1are arranged spaced apart from each other on the first orientation side relative to the first center line, and the plurality of second concave portions113a2are arranged spaced apart from each other on the second orientation side relative to the first center line. In cushion layer113, first concave portions113a1and second concave portions113a2are alternately and successively formed when viewed in a cross section taken along the YZ plane. That is, first concave portions113a1and second concave portions113a2are provided alternately in the X axis direction (an example of a second direction). For example, first concave portions113a1and second concave portions113a2that are alternately provided form a corrugated shape (corrugated tabular shape) when viewed in a cross section taken along the XZ plane.

The first center line is an imaginary line that extends through the center of first corrugation113aof cushion layer113in the Z axis direction and is parallel to the X axis direction, and is an example of a reference line. The first center line is a straight line that is parallel to the second center line. Also, the position of the first center line in the stack direction is different from the position of the second center line in the stack direction. The first center line is located on the first orientation side (on the minus side of the Z axis) relative to the second center line.

The portions between ridges113a11and113b22are merely an example of slope portions. The length of ridges113a11and113a22in the Z axis direction is, for example, A/2, but is not limited thereto.

A dotted line shown inFIG.10Bis a straight line or a plane that connects the lower bottoms of second concave portions113a2.

FIG.10Bshows a cross section taken along a section line extending in the X axis direction, but cushion layer113also has the same shape when viewed in a cross section taken along a section line extending in the Y axis direction.

A first portion that includes ridge113b11shown inFIG.10A(for example, a portion of first concave portion113b1on the minus side of the Z axis relative to the dotted line) and a second portion that includes ridge113a22shown inFIG.10B(for example, a portion of second concave portion113a2on the plus side of the Z axis relative to the dotted line) are common portions in cushion layer113. For example, the first portion and the second portion at an intersection of two section lines shown inFIG.9are common portions. That is, first concave portions113a1and second concave portions113b2are connected via first concave portions113b1and second concave portions113a2.

Cushion layer113can be easily compression-deformed in response to outer cover11being pressed. Also, when outer cover11is pressed, in the X axis direction as well, the portions (slope portions) between ridges113a22and113a11are easily flattened toward the outside when viewed in a plan view. With this configuration, input device1enables the user to easily feel a soft tactile sensation.

First concave portions113a1and113b1have the same shape, but may have different shapes. Also, second concave portions113a2and113b2have the same shape, but may have different shapes. Also, the plurality of first concave portions113a1and the plurality of second concave portions113b2are equidistantly spaced, but may be non-equidistantly spaced. Also, the plurality of first concave portions113b1and the plurality of second concave portions113a2are equidistantly spaced, but may be non-equidistantly spaced.

(Variation 2 of the Embodiment)

In the embodiment given above, an example was described in which cushion layer13is formed by using one corrugated member. However, the configuration is not limited thereto, and cushion layer13may be formed by using two or more corrugated members. Input device1according to the present variation will be described with reference toFIG.11.FIG.11is a perspective view of cushion layer213according to the present variation.

As shown inFIG.11, cushion layer213includes first corrugated member213aand second corrugated member213b. First corrugated member213ahas the same configuration as cushion layer13according to Embodiment 1, except that height A is different. Second corrugated member213bis provided rotated from first corrugated member213aabout the Z axis (rotation axis).

First corrugated member213ahas a height lower than height A of cushion layer13according to the embodiment. The height of first corrugated member213ais, for example, A/2, but is not limited thereto. The length between ridge13a1of first concave portion13aand ridge13b1of second concave portion13bof first corrugated member213ain the stack direction (the Z axis direction) is less than p1, where the pitch between adjacent first concave portions13aor adjacent second concave portions13bof first corrugated member213ais represented by p1(width W).

Second corrugated member213bhas a height lower than height A of cushion layer13according to the embodiment. The height of second corrugated member213bis, for example, A/2, but is not limited thereto. The length between ridge13a1of first concave portion13aand ridge13b1of second concave portion13bof second corrugated member213bin the stack direction is less than p2, where the pitch between adjacent first concave portions13aor adjacent second concave portions13bof second corrugated member213bis represented by p2(width W).

In second corrugated member213b, first concave portions13aand second concave portions13bare alternately (for example, successively) provided in the X axis direction (an example of a second direction), and the plurality of first concave portions13aand the plurality of second concave portions13bthat are alternately provided in the X axis direction extend in a direction that intersects the X axis direction (an example of a third direction) when input device1is viewed in a plan view. The direction that intersects the X axis direction is, for example, the Y axis direction that is orthogonal to the X axis direction, but is not limited thereto.

As viewed in a plan view, a direction in which first concave portions13aand second concave portions13bof first corrugated member213aextend (the direction being the X axis direction and an example of a second orientation) and a direction in which first concave portions13aand second concave portions13bof second corrugated member213bextend (the direction being the Y axis direction and an example of a first orientation) intersect each other, and are orthogonal to each other in the present variation. That is, in the present variation, the first orientation and the third direction are directions that are parallel to each other when viewed in a plan view.

First corrugated member213aand second corrugated member213bare provided in an overlapping manner. The expression “first corrugated member213aand second corrugated member213bare provided in an overlapping manner” encompasses a configuration in which first corrugated member213aand second corrugated member213bare provided such that ridges13b1of second concave portions13bof first corrugated member213aand ridges13a1of first concave portions13aof second corrugated member213bare in contact with each other, and also encompasses a configuration in which an additional member (for example, a tabular member) is provided between first corrugated member213aand second corrugated member213b, and first corrugated member213aand second corrugated member213bare provided with the additional member interposed therebetween. First corrugated member213aand second corrugated member213bmay be fixed by using a fixing member, or second corrugated member213bmay be simply placed on first corrugated member213a.

An additional (for example, a tabular member) may be provided between second corrugated member213band design sheet12or between first corrugated member213aand sensor film31.

(Variation 3 of the Embodiment)

In the embodiment given above, an example was described in which ridges13a1and13b1of cushion layer13are curved when viewed in a cross section. However, the configuration is not limited thereto. Ridges13a1and13b1of cushion layer13may each have a flat surface. Input device1according to the present variation will be described with references toFIG.12.FIG.12is a cross-sectional perspective view of cushion layer313according to the present variation.FIG.12is a perspective view of cushion layer313taken along the YZ plane when viewed from the X axis direction toward the minus side of the Z axis.

As shown inFIG.12, in cushion layer313, the ridges of second concave portions313bmay each have flat surface313b1in a state in which stress is not applied to cushion layer313. Flat surface313b1has, for example, a rectangular shape that extends in the X axis direction when viewed in a plan view. Cushion layer313comes into surface contact with design sheet12by flat surfaces313b1. As used herein, the term “surface contact” means that cushion layer313contacts design sheet12in a planar manner (for example, a rectangular shape that extends in the X axis direction) while cushion layer313is not compression-deformed.

Instead of or in addition to flat surface313b1being formed on each second concave portion313b, a flat surface may be formed on each of ridges13a1of first concave portions13a.

(Variation 4 of the Embodiment)

In the embodiment given above, an example was described in which cushion layer13is implemented by using one structural body. However, the configuration is not limited thereto. Cushion layer13may be formed by fitting one or more blocks. A configuration of a cushion layer that includes one or more blocks will be described with reference toFIG.13.FIG.13is a plan view showing a configuration of cushion layer413according to the present variation.

As shown inFIG.13, cushion layer413includes main body413aand blocks413b. In the example shown inFIG.13, three blocks413bare provided. However, there is no particular limitation on the number of blocks413b, and the number of blocks413bmay be one, two, or four or more.

Main body413ais a tabular portion that includes which through holes (not shown) extending in the thickness direction (the Z axis direction) and in which blocks413bare fitted into the through holes. As viewed in a plan view, main body413ais a portion (second portion) where a region of cushion layer413in which no design element is formed is superimposed. Main body413ais, for example, a portion on which second region10bis superimposed when viewed in a plan view.

Main body413amay have a light transmission rate lower than that of blocks413b, and may have, for example, light blocking properties. As used herein, the expression “to have light blocking properties” means having a light transmission rate relatively lower than that of a portion that has light transmission properties, and may also mean, for example, having a light transmission rate of less than 10%, or to completely block light (i.e., having a light transmission rate of substantially zero). Main body413amay be transparent. Main body413ais produce by, for example, molding a silicone rubber. However, the method is not limited thereto.

Blocks413bare fitted into the through holes formed in main body413a. Blocks413bmay be, for example, detachable fitted to main body413a. Blocks413bconstitute portions (first portions) where regions of cushion layer413in which design elements are provided are superimposed when viewed in a plan view. Blocks413bare, for example, portions on which first regions10aare superimposed when viewed in a plan view.

Blocks413bmay have a light transmission rate higher than that of main body413a. Also, blocks413bmay be, for example, transparent or colored with a light transmission color. For example, blocks413bmay be transparent or may be colored with a light transmission color.

Blocks413bare produced by, for example, molding a silicone rubber. However, the method is not limited thereto. Also, the shape of blocks413bwhen viewed in a plan view is not limited to a rectangular shape.

Here, main body413aand blocks413bhave the same cross-sectional shape. That is, in each of main body413aand blocks413b, first concave portions13aand second concave portions13bare formed. First concave portions13aand second concave portions13bthat are formed in main body413a, and first concave portions13aand second concave portions13bthat are formed in blocks413bhave, for example, the same size, shape, and density. With this configuration, cushion layer413can provide the same tactile sensation to the user no matter which one of portions of outer cover11that correspond to main body413aand blocks413bis pressed by the user.

Main body413adoes not necessarily need to have through holes, and may have, for example, bottomed tubular recesses. For example, the movement of blocks413bin the minus direction of the Z axis may be restricted as a result of bottom surfaces of blocks413b(the surfaces of blocks413bon the minus side of the Z axis) abutting against upper surfaces of bottoms that form the recesses (the surfaces of the recesses on the plus side of the Z axis). With this configuration, it is possible to suppress a situation in which blocks413bmove in the Z axis direction by vibrations of the vehicle or the like. In this case, at least the bottom of main body413ahas light transmission properties.

(Variation 5 of the Embodiment)

In the embodiment given above, an example was described in which no structural member is provided in each of spaces13dof cushion layer13. However, the configuration is not limited thereto. A structural member may be provided in each of at least some of the plurality of spaces13d. A configuration of a cushion layer in which a structural member (for example, a light blocking sheet) is provided in each of at least some of the plurality of spaces13dwill be described with reference toFIG.14.FIG.14is a cross-sectional view for showing light blocking sheets513provided in spaces13dof cushion layer13according to the present variation.

As shown inFIG.14, input device1further includes light blocking sheets513in spaces13dof cushion layer13.

Light blocking sheet513is a thin sheet-shaped member that is provided between adjacent first concave portions13ato suppress a situation in which the light that has passed through one of the adjacent first concave portions13aenters the other first concave portion13a(to suppress light leakage). Light blocking sheet513is, for example, inserted in space13d. The light transmission rate of light blocking sheet513is lower than that of cushion layer13. Light blocking sheet513has light blocking properties, and may be colored in, for example, black. Also, the shape of light blocking sheet513when viewed in a cross section is a rectangular shape, but is not limited thereto.

Light blocking sheet513is configured such that the same tactile sensation can be given to the user between when the position of outer cover11that corresponds to a portion in which light blocking sheet513is provided is pressed and when the position of outer cover11that corresponds to a portion in which light blocking sheet513is not provided is pressed. Also, for example, light blocking sheet513may be thinner than the thickness of cushion layer13. Also, for example, light blocking sheet513may be produced by molding a silicone rubber.

(Variation 6 of the Embodiment)

In the embodiment given above, an example was described in which cushion layer13does not contain light diffusing particles that have a light diffusing function. However, the configuration is not limited thereto. Cushion layer13may contain light diffusing particles. A configuration of a cushion layer that contains light diffusing particles will be described with reference toFIG.15. FIG. is a cross-sectional view of cushion layer613according to the present variation.

As shown inFIG.15, outer cover member10includes cushion layer613instead of cushion layer13according to the embodiment.

Cushion layer613contains light diffusing particles613a. Light diffusing particles613ahave a refractive index different from that of the material that constitutes cushion layer613. In the present embodiment, light diffusing particles613ahave a refractive index different from that of the silicone rubber. Light diffusing particles613aare inorganic fine particles such as silica or glass beads, but may be resin particles.

Light diffusing particles613aare contained in first concave portions13aand second concave portions13b. Light diffusing particles613aare uniformly dispersed within cushion layer613. However, the configuration is not limited thereto. Also, cushion layer613that contains light diffusing particles613amay be produced by using any known production method.

Light diffusing particles613ado not necessarily need to be contained in cushion layer613, and may be contained in design sheet12(for example, sheet member12a). In the case where sheet member12ais formed by using a silicone rubber that has light transmission properties, light diffusing particles613ahave a refractive index different from that of the silicone rubber.

As described above, as a result of at least one of design sheet12or cushion layer613containing light diffusing particles613a, the input device according to the present variation can suppress the occurrence of brightness variations even when cushion layer613is configured by arranging a plurality of first concave portions13aand a plurality of second concave portions13b.

(Variation 7 of the Embodiment)

In the embodiment given above, an example was described in which, in portions corresponding to through holes32aof frame32, cushion layer13is held only by sensor film31as shown inFIG.5. However, the configuration is not limited thereto. Sensor film31and protective layer35that has light transmission properties may be provided in this order on a surface of cushion layer13that is opposite to a surface of cushion layer13on which outer cover11is provided. A configuration of an input device that includes protective layer35will be described with reference toFIG.16.FIG.16is a cross-sectional view of an input device according to the present variation.

As shown inFIG.16, in the input device according to the present variation, between cushion layer13and frame32, sensor film31and protective layer35are provided in this order from the cushion layer13side.

Frame32is provided between sensor film31and light source33and includes through holes32aat positions corresponding to the design elements formed in design sheet12.

Protective layer35reduces the stress applied to sensor film31provided in portions corresponding to through holes32aby a pressing force when the user performs a press operation. For example, in the configuration shown inFIG.5, cushion layer13is held only by sensor film31in the portions corresponding to through holes32aof frame32. For this reason, each time the upper portion (outer cover11) of through hole32athat corresponds to a design element is pressed by a finger, the pressing force is applied directly to sensor film31via compression-deformed cushion layer13. As a result, in sensor film31, stress may be concentratedly applied to, in particular, the edge portion of through hole32a.

To address this, with the input device according to the present variation, protective layer35is provided between sensor film31and frame32. With this configuration, in particular, the stress applied to the edge portion of through hole32ais received by protective layer35, and thus the stress concentratedly applied to sensor film31is reduced, and high reliability can be obtained.

In order to reduce the stress concentratedly applied to sensor film31, protective layer35is harder than sensor film31. Protective layer35is, for example, a light transmission resin plate (for example, a polycarbonate plate), PET (polyethylene terephthalate) film, or the like, but is not limited thereto. Protective layer35may be formed by using, for example, a silicone rubber that has light transmission properties. Also, protective layer35may be formed by using the same material (for example, a PET film) as that of sensor film31. In this case, protective layer35is thicker than sensor film31.

Protective layer35may contain light diffusing particles (for example, light diffusing particles613a) as described in Variation 7 of the embodiment. The light diffusing particles have a refractive index different from that of the resin or the silicone rubber that constitutes protective layer35, and may be, for example, inorganic fine particles such as silica or glass beads, or resin particles. With this configuration, the light emitted from light source33is diffused in advance before the light reaches cushion layer13. Accordingly, the input device according to the present variation can suppress brightness variations caused by cushion layer13, and further improve the appearance of the design elements.

Also, the brightness variations caused by cushion layer13can be further suppressed by combining protective layer35of the present variation that contains light diffusing particles with the configuration of Variation 6 of the embodiment in which at least one of design sheet12or cushion layer613contains light diffusing particles613a.

Also, protective layer35is formed to cover the regions of frame32in which through holes32aare formed and the region of frame32in which no through hole32ais formed when viewed in a plan view. It can also be said that protective layer35is formed to extend over first regions10a(seeFIG.1) and second region10b(seeFIG.1) when viewed in a plan view. It can also be said that protective layer35is formed to extend over the switch portions and the non-switch portion when viewed in a plan view.

In the case of the configuration in which a light guiding member is provided for each through hole32ato close through hole32aor the configuration in which frame32is formed by two-color molding a light transmission resin and a light blocking resin, without forming through holes32aas described in the embodiment given above, protective layer35may not need to be formed because the stress concentratedly applied to sensor film31due to a press operation performed by the user rarely occurs.

(Variation 8 of the Embodiment)

In the embodiment given above, an example was described in which vibration device40is provided on the minus side of the Z axis of frame member30. With this configuration, the input device enables the user to easily feel the vibrations in the Z axis direction (the thickness direction of cushion layer13). However, the configuration is not limited thereto. Vibration device40may be configured to also vibrate within the XY axis plane, or in other words, in the plane direction of cushion layer13. As a specific example of vibration device40that also vibrates in the plane direction described above, inFIG.5, vibration device40that vibrates in the Z axis direction may be attached at an angle to frame member30.

With this configuration, frame member30vibrates not only in Z the axis direction, but also in the X axis direction, the Y axis direction, or both directions. Here, when cushion layer13is compression-deformed by the press operation performed by the user, at least a portion of the vibrations in the Z axis direction is absorbed by the cushion layer. However, by configuring vibration device40to also vibrate in the X axis direction, the Y axis direction, or both directions, the vibrations in a direction other than the Z axis direction, or in other words, the vibrations in the plane direction of cushion layer13can be transmitted to the user's finger, and thus the vibrations absorbed by cushion layer13can be suppressed.

In the present variation, a configuration was described in which vibration device40is attached at an angle to frame member30. However, the configuration is not limited thereto. In the input device, for example, vibration device40that can vibrate in the X axis direction, the Y axis direction, or both directions may be attached to frame member30to cause cushion layer13to vibrate only in the plane direction, or vibration device40that can vibrate in all directions including the X axis direction, the Y axis direction, and the Z axis direction may be attached to frame member30.

In the case where vibration device40vibrates in the plane direction, a gap that corresponding to the amount of vibrations in the plane direction may be provided between frame member30(for example, frame32) and frame body14.

OTHER EMBODIMENTS

Input device1according to one or more aspects of the present disclosure has been described based on the embodiment and the like. However, the present disclosure is not limited to the embodiment and the like given above. The one or more aspects of the present disclosure may also encompass other embodiments obtained by making various modifications that can be conceived by a person having ordinary skill in the art to the above embodiment and the like as well as embodiments implemented by any combination of the structural elements of different embodiments without departing from the scope of the one or more aspects of the present disclosure.

For example, in the embodiment and the like given above, an example was described in which outer cover11, design sheet12, and cushion layer13are stacked in direct contact with each other in this order, but the configuration is not limited thereto. An additional tabular layer may be provided in at least one of between outer cover11and design sheet12or between design sheet12and cushion layer13. The tabular layer may be a layer that has cushioning properties.

Also, in the embodiment and the like given above, there is no particular limitation on the number of push detectors100included in input device1. The number of push detectors100included in input device1may be one, or two or more.

Also, in the embodiment and the like given above, an example was described in which each design element is displayed by the light that has passed through design sheet12. However, the configuration is not limited thereto. Input device1may be configured such that each design element is displayed by the light blocked by design sheet12.

Also, in the embodiment and the like given above, an example was described in which light source33includes a plurality of light emitting elements33b. However, light source33may include, for example, one surface light source.

Also, the height, the thickness, and the like used in the embodiment and the like given above may be any of an average length value, a median length value, a mode length value, a maximum length value, and a minimum length value.

Also, the functional blocks shown in the block diagram are merely exemplary. Accordingly, it is possible to implement a plurality of functional blocks as a single functional block, or divide a single functional block into a plurality of blocks. Alternatively, some functions may be transferred to other functional blocks. Also, the functions of a plurality of functional blocks that have similar functions may be processed by a single piece of hardware or software in parallel or by time division.

Also, in the embodiment given above, a structural element (for example, a controller) may be configured using dedicated hardware, or may be implemented by executing a software program suitable for the structural element. The structural element may be implemented by a program executor such as a CPU or a processor reading and executing a software program recorded in a recording medium such as a hard disk or a semiconductor memory.

FURTHER INFORMATION ABOUT TECHNICAL BACKGROUND TO THIS APPLICATION

The disclosures of the following patent applications including specification, drawings, and claims are incorporated herein by reference in their entirety: Japanese Patent Application No. 2022-074482 filed on Apr. 28, 2022, and Japanese Patent Application No. 2022-170883 filed on Oct. 25, 2022.

INDUSTRIAL APPLICABILITY

The present disclosure is useful as a display device and an input device incorporated in a vehicle or the like.

While various embodiments have been described herein above, it is to be appreciated that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure as presently or hereafter claimed.