JP2015064757A - Tactile sense transmission type touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To do away with risk that a vibrating body is damaged caused by large flexure of a base body when tactile vibration has occurred, and to effectively suppress damping of the tactile vibration.SOLUTION: A tactile sense transmission type touch panel has: a resin base body 1 formed with a capacitance detection region 3 on a lower side principal surface, mounted with vibrating bodies 4 generating tactile vibration by a capacitance detection signal of the capacitance detection region 3 outside the capacitance detection region 3 of the lower side principal surface, and formed with a side wall part 1a in the peripheral edge of the lower side principal surface; and a casing 2 storing the base body 1 thereinside with a prescribed gap 6. A cross sectional shape of a lower end part of the side wall part 1a is tapered, a downmost end part 1b is on the inner side rather than a center line G in the width direction of the side wall part 1a, and the gap 6 is supported by the inner face of the casing 2 when the base body 1 is pressed and when the side wall part 1a bends outward, and has a width restricting the bending.

Description

  The present invention relates to a capacitive tactile transmission type touch panel having a tactile transmission (tactile feedback) function.

  An example of the configuration of a conventional tactile transmission (tactile feedback) type touch panel is shown in FIGS. 5A is a perspective view of the touch-sensitive touch panel, FIG. 5B is a bottom view showing the lower main surface of the diaphragm 10, and FIG. 5C is a cross-sectional view taken along line D1-D2 of FIG. As shown in these drawings, the diaphragm 10 is placed and fixed on the upper main surface of a support substrate 14 made of a transparent material such as glass or plastic via a support member 13. On the lower main surface of the diaphragm 10, a capacitance detection region 11 and a piezoelectric body 12 made of lead zirconate titanate and the like provided outside the capacitance detection region 11 are installed. The diaphragm 10 is made of a transparent material such as glass or plastic, like the support substrate 14.

  The capacitance detection area 11 is, for example, a projection type capacitance type, and is composed of ITO (Indium Tin Oxide) transparent electrodes formed linearly in a specific direction (for example, the x direction). A lower electrode line, a transparent insulator layer thereon, an upper electrode line made of an ITO transparent electrode formed linearly in a direction perpendicular to the specific direction above (for example, the y direction), and the like And an upper transparent coating layer. Thereby, it is possible to capture a change in capacitance due to electrostatic coupling between the upper electrode line and the lower electrode line when an electrostatic conductor such as a human fingertip approaches the capacitance detection region 11. . Then, by specifying the upper electrode line and the lower electrode line in which the capacitance change has occurred by an external control IC (Integrated Circuit), a control LSI (Large Scale Integrated Circuit), or the like, the capacitance detection region 11 The position at which the electrostatic capacity of the switch changes can be specified two-dimensionally, that is, in a plane.

  The piezoelectric body 12 generates tactile vibration by a capacitance detection signal generated when a change in capacitance is detected in the capacitance detection region 11. Tactile vibration is a specified frequency and amplitude so that when a person presses an operation button on the touch panel, when a person clicks a key, or when a person operates a slide bar, it can be operated while checking their tactile sensation. This is the vibration that is transmitted to the human fingertip. Also, in recent years, it has been felt that an object displayed on a display device such as a liquid crystal display device (LCD) provided under the tactile transmission type touch panel is actually touched. Techniques to convey to the fingertips have also been proposed.

  The support member 13 is made of a relatively soft material such as silicone resin in order to suppress attenuation of tactile vibration, and is bonded to the corner of the diaphragm 10 and the corner of the support member 13. Alternatively, the support member 13 is made of an adhesive material such as an epoxy resin.

  Further, as another conventional example, a flat vibration body such as a touch panel and a vibration element for vibrating the flat vibration body are provided, and the flat vibration body is vibrated by a pair of elongated fixing cushions arranged in parallel to each other. There has been proposed an electronic device such as a mobile phone that is supported at a position distant from the device (for example, see Patent Document 1 below). The fixing cushion is made of a material such as high-density microcell urethane foam. And by this structure, while being able to support a flat vibration body reliably and stably, a large vibration of a flat vibration body is enabled, and the attenuation | damping of the vibration can be suppressed.

  As another conventional example, a touch panel, a vibration part that vibrates the touch panel, and a connecting piece that couples the touch panel to a support member (housing) so as to be capable of bending vibration are provided. An electronic device having a liquid crystal display panel or the like has been proposed in which an annular elastic body is provided between one part and a touch panel or a connecting piece and the other end is connected to a wall part to form a closed space. (For example, see Patent Document 2 below). An elastic body consists of materials, such as silicone rubber, and may have a bellows-like expansion-contraction part. And by this structure, the penetration | invasion of the water and dust into an electronic device can be suppressed, without attenuating the vibration of a touch panel as much as possible.

  As another conventional example, a touch panel, a frame-like elastic support member that supports the touch panel in a dust-proof manner, and a vibration unit that vibrates the touch panel, the elastic support member is sheared by vibration of the touch panel. An electronic device having a liquid crystal display panel or the like that supports a touch panel in a casing so as to be deformed has been proposed (for example, see Patent Document 3 below). And by this structure, dust-proof measures can be taken without reducing the vibration of the touch panel as much as possible.

JP 2006-215776 A JP 2012-181772 A JP 2012-216137 A

  In the above-described conventional tactile transmission type touch panel shown in FIG. 5, the plastic touch panel is thinned for the purpose of reducing the weight, improving the bending strength as compared with a glass diaphragm, and ease of manufacturing. If the diaphragm 10 is used, the amount of deflection of the diaphragm 10 when tactile vibration occurs is increased. As a result, the piezoelectric body 12 may be damaged. Further, Patent Documents 1 to 3 do not disclose any configuration or means for eliminating the risk of damage to the piezoelectric body due to the large amount of deflection of the plastic diaphragm.

  Accordingly, the present invention has been completed in view of such circumstances, and the purpose of the present invention is to make a vibrating body such as a piezoelectric body by virtue of a large deflection of the base as a diaphragm when tactile vibration occurs. It is to prevent the possibility of damage. Another object of the present invention is to effectively suppress the attenuation of tactile vibration while suppressing the bending of the substrate. Furthermore, another object of the present invention is to provide a tactile transmission type touch panel having a waterproof effect and a dustproof effect.

  In the touch-sensitive touch panel according to the present invention, a capacitance detection region is formed on the lower main surface, and the capacitance detection signal of the capacitance detection region is outside the capacitance detection region of the lower main surface. A vibration body that generates a tactile vibration is provided, and further includes a resin base having a side wall formed on the periphery of the lower main surface, and a housing that houses the base with a predetermined gap inside. The side wall portion has a tapered cross-sectional shape at the lower end portion, the lowermost end portion is on the inner side of the center in the width direction of the side wall portion, and the gap is formed by pressing the base body. When the side wall portion is bent outward, the side wall portion is supported by the inner surface of the housing and has a width for restricting the bending.

  In the tactile transmission type touch panel according to the present invention, preferably, the side wall portion has a groove formed on an inner surface thereof.

  In the tactile transmission type touch panel of the present invention, a capacitance detection region is formed on the lower main surface, and the capacitance of the capacitance detection region is outside the capacitance detection region on the lower main surface. A resin base body in which a vibrating body that generates a tactile vibration by a detection signal is installed, and a side wall portion is formed on the periphery of the lower main surface, and a housing that houses the base body with a predetermined gap inside. The side wall portion has a groove formed on an inner surface thereof, and the gap is supported on the inner surface of the housing when the base body is pressed and the side wall portion is bent outward. And has a width that regulates the deflection.

  In the tactile transmission type touch panel according to the present invention, preferably, the casing is provided with an elastic member at a portion where the lowermost end portion of the side wall portion of the casing contacts.

  The tactile transmission type touch panel of the present invention has a capacitance detection area formed on the lower main surface, and a tactile sensation is detected by a capacitance detection signal of the capacitance detection area outside the capacitance detection area of the lower main surface. A vibration body that generates vibration is installed, and further includes a resin base having a side wall formed on the periphery of the lower main surface, and a housing that houses the base with a predetermined gap inside. The lower end portion of the portion has a tapered shape and the lowermost end portion is on the inner side of the center in the width direction of the side wall portion, and the gap is bent outward by the press of the base. When the tactile vibration is generated, the side wall portion of the base body bends outward when the tactile vibration is generated, and the side wall portion of the housing is supported by the inner surface of the housing. It is supported by the inner surface and the bending of the side wall is restricted. As a result, there is no possibility that the vibrating body will be damaged by the substrate being greatly bent.

  Further, in the tactile transmission type touch panel of the present invention, when the side wall portion is formed with a groove on the inner side surface, the side wall portion of the base body is more easily bent when the tactile vibration is generated, and the side wall portion is restricted from bending. Is even easier.

  The tactile transmission type touch panel of the present invention has a capacitance detection area formed on the lower main surface, and a tactile sensation is detected by a capacitance detection signal of the capacitance detection area outside the capacitance detection area of the lower main surface. A vibration body that generates vibration is installed, and further includes a resin base having a side wall formed on the periphery of the lower main surface, and a housing that houses the base with a predetermined gap inside. The portion has a groove formed on the inner side surface thereof, and the gap has a width that is supported by the inner surface of the housing when the base body is pressed and the side wall portion is bent outward to restrict the bending. According to the configuration, when tactile vibration is generated, the side wall portion of the base body bends outward, and the side wall portion is supported by the inner surface of the housing, thereby restricting the bending of the side wall portion. As a result, there is no possibility that the vibrating body will be damaged by the substrate being greatly bent.

  Further, in the haptic transmission type touch panel according to the present invention, when the casing is provided with an elastic member at a portion where the lowermost end portion of the side wall of the bottom surface is in contact, it is possible to effectively suppress attenuation of haptic vibration. it can. Further, the base is accommodated inside the housing, and the lowermost end of the side wall of the base is in contact with the bottom surface of the housing, so that the airtightness is enhanced, and the waterproof effect and the dustproof effect are provided.

It is a figure which shows the haptic transmission type touch panel which concerns on one embodiment of this invention, (a) is a perspective view of a haptic transmission type touch panel, (b) is downward (( It is sectional drawing of a base | substrate and a housing | casing seen from the direction shown by the white arrow of a). (A) is a cross-sectional view taken along line A1-A2 shown in FIG. 1 (b), (b) is a cross-sectional view taken along line B1-B2 shown in FIG. 1 (b), and (c) is shown in FIG. 1 (b). It is a C1-C2 line sectional view. (A)-(d) is a figure which shows the tactile transmission type touch panel which concerns on various embodiment of this invention, and is sectional drawing which shows the various forms of the side wall part of a base | substrate. (A)-(f) is a figure which shows the haptic transmission type touch panel which concerns on the various form of this invention, and is sectional drawing which shows the various form of the side wall part of a base | substrate. It is a figure which shows an example of the conventional tactile transmission type touch panel, (a) is a perspective view of a tactile transmission type touch panel, (b) is a bottom view which shows the lower main surface of a diaphragm, (c) is a figure of (b) It is D1-D2 sectional view taken on the line.

  Hereinafter, embodiments of a touch-sensitive touch panel according to the present invention will be described with reference to the drawings. However, each drawing referred to below shows, for convenience of explanation, main members necessary for explaining the configuration of the present invention among the components in the embodiment of the tactile transmission type touch panel of the present invention. . Therefore, the tactile transmission type touch panel according to the present invention may include arbitrary components such as wiring conductors, control ICs, control LSIs, drive circuit boards, and display devices such as LCDs, which are not shown in the drawings.

  First, the tactile transmission type touch panel according to the present embodiment will be described with reference to FIGS. 1A is a perspective view of a tactile transmission type touch panel, and FIG. 1B is a perspective view of the substrate and housing viewed from below (in the direction indicated by the white arrow in FIG. 1A) when cut along the cutting plane P in FIG. It is sectional drawing of a body. 2 (a) is a cross-sectional view taken along line A1-A2 shown in FIG. 1 (b), (b) is a cross-sectional view taken along line B1-B2 shown in FIG. 1 (b), and (c) is shown in FIG. 1 (b). It is the C1-C2 sectional view taken on the line shown in FIG. FIGS. 3A to 3E are views showing tactile transmission type touch panels according to various embodiments of the present invention, and are cross-sectional views showing various forms of a side wall portion of a base. FIGS. 4A to 4D are views showing tactile transmission type touch panels according to various embodiments of the present invention, and are cross-sectional views showing various forms of the side wall portion of the substrate.

  As shown in FIG. 1 to FIG. 4, the tactile transmission type touch panel of the present invention has a capacitance detection area 3 formed on the lower main surface, and a static detection area 3 outside the capacitance detection area 3 on the lower main surface. A substrate 1 made of resin, in which a vibrating body 4 that generates tactile vibration in response to a capacitance detection signal in the capacitance detection region 3 and a side wall 1a is formed on the periphery of the lower main surface, and the substrate 1 are suitable. Has a casing 2 that accommodates a predetermined gap 6 on the inside with the upper main surface exposed, and the side wall portion 1a has a taper-shaped cross section at its lower end. The lower end 1b is inside the width direction center (center line G) of the side wall 1a, that is, on the inner space side of the housing 2, and the gap 6 is bent outward when the base 1 is pressed. In this case, it has a width that is supported by the inner surface of the housing 2 and restricts the bending. Preferably, the housing 2 is provided with an elastic member 7 at a site where the lowermost end 1b of the side wall 1a on the bottom surface abuts. The base body 1 is preferably housed inside the housing 2 with its upper main surface exposed, but the housing 2 is a box-shaped body having an upper surface portion (ceiling surface portion). The main surface portion of the base body 1 is located below the upper surface portion of the housing 2, and the main surface portion of the base body 1 is pressed and operated by the fingertip or the like through the upper surface portion of the housing 2.

  The substrate 1 is made of a resin made as thin as possible for the purpose of reducing the weight, improving the flexural strength as compared with a glass diaphragm, and ease of manufacture. For these purposes, the material of the substrate 1 is preferably a transparent resin material such as polycarbonate, polyimide, polyethylene terephthalate, acrylonitrile butadiene styrene (ABS resin), and acrylic resin.

  The thickness of the main surface portion (vibration plate portion) provided with the capacitance detection region 3 in the substrate 1 is preferably about 1 mm to 2 mm. When the thickness of the main surface portion of the substrate 1 is less than 1 mm, the strength of the main surface portion tends to be insufficient, and the main surface portion may be bent or damaged more than necessary when the vibrating body 4 vibrates. When the thickness of the main surface portion exceeds 2 mm, the strength of the main surface portion tends to increase, and when the vibrating body 4 vibrates, the main surface portion tends not to sufficiently vibrate.

  The height of the side wall 1a of the base 1 is preferably 1 mm to 2 mm. When the height of the side wall 1a is less than 1 mm, the strength of the side wall 1a tends to increase, and when the vibrating body 4 vibrates, the main surface tends to not vibrate sufficiently. In addition, a situation in which the capacitance detection region 3 comes into contact with the bottom surface of the housing 2 is likely to occur. When the height of the side wall part 1a exceeds 2 mm, the strength of the side wall part 1a tends to be insufficient, and the main surface part tends to bend more than necessary when the vibrating body 4 vibrates. In addition, the thickness of the touch-sensitive touch panel is increased, and a situation in which the size is increased is likely to occur.

  As shown in FIG. 3 (a), the side wall 1a has a taper-shaped cross section at its lower end, and the lowermost end 1b is on the inner side of the center (center line G) in the width direction of the side wall 1a. It is in. In this configuration, the deviation width of the lowermost end portion 1b from the center line G is preferably 50% or more of 1/2 of the width of the side wall portion 1a. In this case, when tactile vibration is generated, the side wall 1a is easily bent outward.

  The gap 6 between the side wall 1a of the base 1 and the inner surface of the housing 2 is supported by the inner surface of the housing 2 when the main surface of the base 1 is pressed and the side wall 1a is bent outward. It has a width to regulate. Accordingly, the width of the gap 6 is preferably 0.2 mm to 0.3 mm. When the width of the gap 6 is less than 0.2 mm, the side wall 1a is not sufficiently bent, and tactile vibration tends to be hardly generated effectively. When the width | variety of the clearance gap 6 exceeds 0.3 mm, there exists a tendency for the bending of the side wall part 1a to become large too much, and the effect which regulates the bending of the side wall part 1a tends to fall.

  The housing 2 accommodates the base body 1 with a predetermined gap 6 inside with the upper main surface exposed, and the plan view shape of the housing 2 is that of the base body 1 as shown in FIG. It is almost similar to the shape in plan view. Examples of the material of the casing 2 include polycarbonate, polyimide, polyethylene terephthalate, acrylonitrile butadiene styrene (ABS resin), resins such as acrylic resin, metals such as stainless steel and aluminum. Therefore, a transparent material is preferable.

  The side wall 1a of the base body 1 may be formed on the entire periphery of the periphery of the lower main surface of the base body 1. In that case, when the upper main surface of the base body 1 is pressed by a human fingertip or the like, it is possible to prevent the side wall portion 1a from dispersing the pressing force over a wide range and causing a large amount of bending locally on the base body 1. . Further, the side wall 1 a may be partially formed on the lower main surface of the base 1. In that case, it is preferable to form one or more side wall portions 1 a so as to form a pair with opposing portions of the lower main surface of the substrate 1. Thereby, when the upper main surface of the base body 1 is pressed by a human fingertip or the like, it is possible to prevent the side wall portion 1a from dispersing the pressing force and cause a large amount of local bending in the base body 1.

  The shape of the substrate 1 in plan view is not particularly limited, but may be various shapes such as a square shape such as a square and a rectangle, a polygonal shape of pentagon or more, a circle, an ellipse, and an oval. 1 to 4 show a base body 1 having a quadrangular plan view shape suitable for the operability of a tactile transmission type touch panel.

  As shown in FIG. 2, the upper end surface of the housing 2 and the upper main surface of the base 1 are substantially flush with each other, so that when a human fingertip operates the touch panel, a step hits the fingertip. Thus, it is possible to prevent a situation in which a sense of incongruity occurs at the fingertip. In addition, the upper main surface of the base body 1 is preferably slightly higher than the upper end surface of the housing 2. In this case, when the upper main surface of the base body 1 is pressed by a human fingertip or the like, the side wall portion 1a of the base body 1 is used. Becomes easier to bend outward.

  The housing 2 is provided with an elastic member 7 at a portion where the bottom end 1b of the side wall 1a on the bottom surface abuts. The elastic member 7 is made of an elastic material such as a porous resin such as silicone resin (silicone rubber) or porous urethane resin, rubber, sponge, spring, leaf spring, etc., but is transparent from the viewpoint of the appearance and operability of the touch panel. Are preferred. Moreover, the dent which accommodates the elastic member 7 may be formed in the site | part in which the elastic member 7 is provided in the bottom face of the housing | casing 2, In that case, the position shift of the elastic member 7 can be suppressed effectively. Alternatively, the portion where the elastic member 7 is provided on the bottom surface of the housing 2 may be free of dents, and the elastic member 7 may be adhered to the bottom surface of the housing 2 with an adhesive. When a recess for accommodating the elastic member 7 is formed at a portion where the elastic member 7 is provided on the bottom surface of the housing 2, the elastic member 7 may be bonded to the recess with an adhesive.

  When the elastic member 7 is made of, for example, a silicone resin, the thickness is preferably 0.5 mm to 1 mm. When the thickness of the elastic member 7 is less than 0.5 mm, when the vibrating body 4 generates tactile vibration, the tactile vibration is easily transmitted directly to the housing 2 side, and the predetermined frequency and amplitude of the tactile vibration change. It becomes easy to attenuate. When the thickness of the elastic member 7 exceeds 1 mm, the tactile vibration is absorbed by the elastic member 7 and easily attenuates when the vibrating body 4 generates tactile vibration.

  As shown in FIG. 1 and FIG. 2, the side wall of the housing 2 is provided with a protrusion 5 protruding inward, and the tip of the protrusion 5 abuts on the outer surface of the side wall 1 a of the base 1. It is good to have. In this case, the base body 1 is positioned by the protrusions 5 and the width of the gap 6 can be maintained. The protrusion 5 is, for example, disposed in a dent, hole, or through-hole formed in the side wall portion of the housing 2 and fixed by an adhesive or the like. The protrusion 5 is made of a porous resin such as silicone resin (silicone rubber), porous urethane resin, acrylic resin, epoxy resin, rubber, sponge, aluminum, stainless steel, brass (copper-zinc alloy) metal, alumina ceramic, etc. From the viewpoint of the appearance and operability of the touch panel, a transparent material is preferable. Further, the protrusion 5 is preferably made of an elastic material in order to suppress attenuation when tactile vibration is generated. Further, the protrusion 5 is a columnar body such as a columnar shape or a prismatic shape whose axial direction is the horizontal direction, a truncated cone shape or a truncated pyramid shape whose axial direction is the horizontal direction and whose front end abuts against the side wall 1a. A shape such as a shape is preferred.

  Moreover, it is preferable that the protrusion 5 is provided in the position where the protrusion 5 includes the extended surface of the lower main surface of the base body 1 in the outer surface of the side wall 1a. In this case, there is an effect that the outward bending of the side wall portion 1a when the base body 1 is pressed can be prevented.

  As shown in FIG. 2, the housing 2 preferably has a through hole 2 a formed on the bottom surface. As a result, the internal space of the housing 2 is not completely sealed, and when the tactile vibration is generated in the base body 1, the air inside the base body 1 and the housing 2 can come and go to the outside. Can be suppressed. The plan view shape of the through hole 2a may be various shapes such as a circle, an ellipse, a quadrangle, and a polygon, but a symmetric shape such as a circle, a square, and a regular polygon is preferable. In that case, attenuation of tactile vibration in the substrate 1 can be suppressed substantially uniformly. Further, the area of the through hole 2a in a plan view is preferably 10% to 30% of the area of the bottom surface of the housing 2. If it is less than 10%, the effect of suppressing attenuation of tactile vibration tends to be small, and if it exceeds 30%, the strength of the housing 2 tends to be insufficient. The through hole 2a is preferably formed at the center of the bottom surface of the housing 2, and in this case, attenuation of tactile vibration in the base 1 can be suppressed substantially uniformly. In addition, when sealing the internal space of the housing | casing 2 and improving a waterproof effect and a dustproof effect, the through-hole 2a does not need to be provided.

  As shown in FIG. 2, the housing 2 is provided with various display devices 2b such as a liquid crystal display device, an organic EL display device, an LED display device, and a plasma element display device on the bottom surface, and the display device 2b is built in. You may do it. Further, the tactile transmission type touch panel of the present invention may be laminated on the display screen of the display device 2b. When the display device 2 b is installed on the bottom surface of the housing 2, a groove or the like (not shown) for air to and from the internal space of the housing 2 and the outside is provided on the exposed bottom surface of the housing 2. It can be provided on the bottom surface of the housing 2 from the through hole 2a. Further, the through hole 2a and another through hole may be formed on the bottom surface of the housing 2 so that the internal space and the external space of the housing 2 are directly communicated with each other.

  FIGS. 3A to 3D are cross-sectional views showing various embodiments of the side wall portion 1a of the base 1. (A) is a configuration in which the cross-sectional shape of the lower end portion of the side wall portion 1a is tapered and the lowermost end portion 1b is on the inner side of the center line G in the width direction (thickness direction) of the side wall portion 1a. As a result, when a pressing force F is applied to the main surface portion of the base 1 from above, a force F1 that causes the side wall portion 1a to bend outward is generated. (B) is a preferred configuration in which the side wall 1a has a groove 8 formed in a bent portion that is bent from the inner side surface to the lower main surface of the base 1 in the configuration of (a). Thereby, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is easily bent outward. (C) is a preferred configuration in which the side wall 1a is formed with a groove 9 extending in the lateral direction on the inner surface thereof in the configuration of (b). Thereby, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is more easily bent outward. The groove 9 only needs to have a function of bending the side wall 1a outward. For example, the groove 9 extends in the lateral direction (a direction parallel to the lower main surface of the base 1), and the plurality of grooves 9 in the lateral direction. Various configurations such as a configuration in which dots are scattered can be adopted. In addition, the structure where the groove | channel 9 is extended in a horizontal direction is preferable at the point which can bend the side wall part 1a outside. Further, the groove 9 may be located at any location on the inner side surface of the side wall portion 1a. In particular, the groove 9 has a vertical central portion on the inner side surface of the side wall portion 1a, that is, a length in the vertical direction of the side wall portion 1a. On the other hand, it is preferable to be in a region having a length of about 20% to 50% including the center in the vertical direction of the side wall 1a. The cross-sectional shape of the groove 9 is preferably tapered in the thickness direction (shape such as a horizontal V shape or a horizontal U shape). In this case, the function of bending the side wall portion 1a outward is enhanced. . Further, the cross-sectional shape of the groove 9 may be a U-shape or the like that is not tapered in the thickness direction.

  (D) of FIG. 3 is the structure of (a)-(c), and the lowest end part 1b shown in the dotted-line circle of (a) is the center line G and the side wall in the width direction (thickness direction) of the side wall part 1a. It is the structure which exists in the position between the inner surfaces of the part 1a. Also in this case, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is easily bent outward.

  4A to 4F are cross-sectional views showing various embodiments of the side wall portion 1a of the base 1. FIG. 4A, the cross-sectional shape of the lower end portion of the side wall 1a is not tapered, and a groove 8 is formed in a bent portion that bends from the inner surface of the side wall 1a to the lower main surface of the base 1. This is a preferred configuration. Also in this case, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is easily bent. (B) is the structure of (a), the cross-sectional shape of the lower end part of the side wall part 1a is not tapered, and the side wall part 1a is formed with a groove 9 extending in the lateral direction on the inner side surface thereof. This is a preferred configuration. Thereby, when the pressing force F is applied to the main surface portion of the base 1 from above, the side wall portion 1a is more easily bent outward.

  FIG. 4 (c) shows that the cross-sectional shape of the lower end portion (portion surrounded by a dotted circle) of the side wall portion 1a is linearly tapered, and the lower side of the base body 1 from the inner side surface of the side wall portion 1a. This is a preferred configuration in which the groove 8 is formed in a bent portion that is bent toward the main surface. In this case, the lower end portion of the side wall portion 1a has a substantially symmetrical shape. With this configuration, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is easily bent outward. (D) is a preferred configuration in which the side wall 1a is formed with a groove 9 extending in the lateral direction on the inner surface thereof in the configuration of (c). Thereby, when the pressing force F is applied to the main surface portion of the base 1 from above, the side wall portion 1a is more easily bent outward.

  FIG. 4 (e) shows that the cross-sectional shape of the lower end portion of the side wall 1a is a tapered shape, and a groove is formed in a bent portion that bends from the inner surface of the side wall 1a to the lower main surface of the base 1. 8 is a preferred configuration. In this case, the lower end portion of the side wall portion 1a has a substantially symmetrical shape. With this configuration, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is easily bent outward. (F) is a preferable configuration in which the side wall 1a is formed with a groove 9 extending in the lateral direction on the inner surface thereof in the configuration of (e). Thereby, when the pressing force F is applied to the main surface portion of the base body 1 from above, the side wall portion 1a is easily bent outward. In addition, the groove | channel 9 may be formed also when the groove | channel 8 is not formed in the inner surface of the side wall part 1a.

  As shown in FIGS. 1 and 2, the substrate 1 has a capacitance detection region 3 formed on the lower main surface thereof. The capacitance detection area 3 is, for example, of the projection type, and is made of ITO (Indium Tin Oxide) transparent electrodes formed linearly in a specific direction (for example, the x direction). A lower electrode line, a transparent insulator layer thereon, an upper electrode line made of an ITO transparent electrode formed linearly in a direction perpendicular to the specific direction above (for example, the y direction), and the like And an upper transparent coating layer. Thereby, it is possible to capture a change in capacitance due to electrostatic coupling between the upper electrode line and the lower electrode line when an electrostatic conductor such as a human fingertip approaches the capacitance detection region 3. . Then, by specifying the upper electrode line and the lower electrode line in which the capacitance change has occurred by an external control IC (Integrated Circuit), a control LSI (Large Scale Integrated Circuit), or the like, the capacitance detection region 3 The position at which the electrostatic capacity of the switch changes can be specified two-dimensionally, that is, in a plane. Further, the capacitance detection region 3 may be of a surface type capacitance type.

  The electrode wires such as the lower electrode wire and the upper electrode wire constituting the capacitance detection region 3 may be made of a conductive member having translucency as a constituent material. Examples of the light-transmitting conductive member include ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), AZO (Al-Doped Zinc Oxide), tin oxide, zinc oxide, or a conductive polymer. . As a method for forming the electrode wire, for example, the above-described material is formed by sputtering, vapor deposition, or CVD (Chemical Vapor Deposition). And it forms by apply | coating photosensitive resin to the surface of this transparent conductive film, and patterning a transparent conductive film in a predetermined shape through exposure, image development, and an etching process.

  The transparent insulator layer and the transparent coating layer constituting the capacitance detection region 3 are made of, for example, an acrylic resin, a silicone resin, a rubber resin, a urethane resin, or an inorganic compound containing silicon. Can be mentioned. Examples of the method for forming the transparent insulator layer and the transparent coating layer include a transfer printing method, a spin coating method, and a slit coating method.

The vibrating body 4 includes a piezoelectric body such as a ceramic piezoelectric body or a polymer piezoelectric body, an eccentric motor, or the like. Ceramic piezoelectric materials include barium titanate (BaTiO ₃ ), lead titanate (PbTiO ₃ ), lead zirconate titanate (Pb [Zr _x Ti _1-x ] O ₃ 0 <x <1 mixed crystal: PZT ), Potassium niobate (KNbO ₃ ), lithium niobate (LiNbO ₃ ), lithium tantalate (LiTaO ₃ ), sodium tungstate (Na _x WO ₃ ), zinc oxide (ZnO, Zn ₂ O ₃ ), Ba ₂ NaNb ₅ O ₅ , Pb ₂ KNb ₅ O ₁₅ , lithium tetraborate (Li ₂ B ₄ O ₇ ), sodium potassium niobate ((K, Na) NbO ₃ ), bismuth sodium titanate (Na _0.5 Bi _0.5 TiO ₃ ), etc. Can be adopted. Polyvinylidene fluoride (1,1-2 fluorinated ethane polymer: PVDF) or the like can be used as a material for the polymer piezoelectric material.

  The tactile transmission type touch panel of the present invention is effective when the vibrating body 4 is made of a ceramic piezoelectric body. This is because the ceramic piezoelectric body may be damaged when a large stress is applied, and the configuration of the present invention works effectively from the viewpoint of preventing the ceramic piezoelectric body from being damaged.

  The vibrating body 4 generates tactile vibration by a capacitance detection signal generated when a change in capacitance is detected in the capacitance detection region 3. The tactile vibration is controlled in a predetermined manner so that it can be operated while checking the tactile sensation when a person presses an operation button on the touch-sensitive touch panel, when a person clicks a key, or when a person operates a slide bar. This vibration is transmitted to the human fingertip with frequency and amplitude. It is also possible to convey to the fingertip a tactile sensation as if actually touching an object displayed on a display device such as a liquid crystal display device provided on the lower side of the touch-sensitive touch panel. The drive control for generating tactile vibration in the vibrating body 4 using the capacitance detection signal as a trigger can be performed by a control IC, a control LSI, or the like (not shown).

  The tactile vibration has a predetermined frequency and amplitude. For example, when a person presses an operation button with a fingertip on a tactile transmission type touch panel, the tactile vibration has a frequency of several hundred Hz and an amplitude of several tens of μm. In addition, when an operation such as key click is performed, the frequency and amplitude are set appropriately. The frequency and amplitude of the haptic vibration are controlled by an external control IC, control LSI, or the like.

  In addition, the vibrating body 4 is installed outside the capacitance detection region 3 on the lower main surface of the base body 1 so as to make a pair with an opposing portion in order to effectively vibrate the main surface portion of the base body 1. It is preferable. Alternatively, the vibrating body 4 may be provided over the entire circumference outside the capacitance detection region 3 on the lower main surface of the base body 1 in order to vibrate the main surface portion of the base body 1 more effectively. In addition, the shape of the vibrating body 4 is preferably a columnar shape such as an elongated rectangular columnar shape as shown in FIGS. In this case, appropriate dimensions such as a width of 3 mm, a thickness of 0.5 mm, and a length of 40 mm can be used.

  The tactile transmission type touch panel according to the present invention can be applied to various electronic devices having a display unit and a display device. The electronic equipment includes automobile route guidance systems (car navigation systems), ship route guidance systems, aircraft route guidance systems, smartphone terminals, mobile phones, tablet terminals, personal digital assistants (PDAs), video cameras, digital cameras, and electronic notebooks. There are personal computers, copying machines, terminal devices for game machines, televisions, watches, product display tags, price display tags, industrial programmable display devices, and the like.

  The above-described embodiment shows a specific example of the embodiment of the present invention, and various appropriate modifications and improvements can be made.

DESCRIPTION OF SYMBOLS 1 Base 1a Side wall part 1b Bottom end part 2 Case 2a Through-hole 2b Display device 3 Capacitance detection area 4 Vibrating body 5 Protrusion 6 Gap 7 Elastic member 8, 9 Groove 10 Diaphragm 11 Electrostatic capacity detection area 12 Piezoelectric body 13 support member 14 support substrate G center line P cutting plane F pressing force F1 force to bend outward

Claims (4)

  A capacitance detection area is formed on the lower main surface, and a vibrating body that generates a tactile vibration by a capacitance detection signal of the capacitance detection area is installed outside the capacitance detection area of the lower main surface. And a resin base having a side wall formed on the periphery of the lower main surface, and a housing that houses the base with a predetermined gap on the inside. The cross-sectional shape of the lower end portion is tapered and the lowermost end portion is on the inner side of the center in the width direction of the side wall portion, and the gap is bent outward by pressing the base. A tactile transmission touch panel having a width that is supported by the inner surface of the housing and restricts bending.   The tactile transmission touch panel according to claim 1, wherein the side wall portion has a groove formed on an inner side surface thereof.   A capacitance detection area is formed on the lower main surface, and a vibrating body that generates a tactile vibration by a capacitance detection signal of the capacitance detection area is installed outside the capacitance detection area of the lower main surface. And a resin base having a side wall formed on the periphery of the lower main surface, and a housing that houses the base with a predetermined gap on the inside. Grooves are formed on the inner surface, and the gap has a width that is supported by the inner surface of the housing and regulates the bending when the base body is pressed and the side wall portion is bent outward. Tactile transmission type touch panel.   The tactile transmission type touch panel according to any one of claims 1 to 3, wherein the casing is provided with an elastic member at a portion where a lowermost end portion of the side wall portion of the casing contacts.