Electrostatic-detection-type input device

Abstract

This electrostatic-detection-type input device comprises an input member having a touch input surface, and a sensor sheet. The sensor sheet has a first electrode part and a second electrode part that generate a touch input detection signal. The touch input surface has: a first operation region that overlaps the first electrode part when seen in plan view; a linear first decorative part that is composed of an electroconductive material and is provided overlapping the first operation region when seen in plan view, the first decorative part having a prescribed width; a second operation region that overlaps the second electrode part when seen in plan view; and a linear second decorative part that is composed of an electroconductive material and is provided overlapping the second operation region when seen in plan view, the second decorative part having a prescribed width. The first decorative part and the second decorative part are not connected to each other and are not electrically connected to other elements.

Description

Electrostatic detection input device

[0001] The present invention relates to an electrostatic sensing input device.

[0002] The following Patent Document 1 discloses a capacitive input device having a touch plate and a decorative layer that decorates the surface of the touch plate, and a configuration having a first background color layer and a second background color layer stacked on top of each other as a basic background color in the decorative layer or a layer for adding a light-blocking function.

[0003] Patent Publication No. 2013-157142

[0004] However, in the technology disclosed in Patent Document 1, the first and second background color layers must be connected to the ground portion by conductors such as conductive rubber, springs, etc. in order to function as guard layers, which increases the number of parts, making it difficult to reduce manufacturing costs.

[0005] In addition, it has been known that if a decorative part made of a conductive material that is not connected to the ground part is provided on the touch input surface of an electrostatic detection input device, serious disturbance signals will be generated, resulting in problems such as erroneous judgments.

[0006] An electrostatic detection input device according to one embodiment is an electrostatic detection input device including an input member having a touch input surface that accepts touch input from an operator, and a sensor sheet that detects the touch input, wherein the sensor sheet has a first electrode portion that generates a detection signal of the touch input by capacitively coupling with the operator's operating body, and a second electrode portion that generates a detection signal of the touch input by capacitively coupling with the operating body, and the touch input surface has a first operation area that overlaps with the first electrode portion in a planar view, a linear first decorative portion made of a conductive material and having a predetermined width that overlaps with the first operation area in a planar view, a second operation area that overlaps with the second electrode portion in a planar view, and a linear second decorative portion made of a conductive material and having a predetermined width that overlaps with the second operation area in a planar view, and the first decorative portion and the second decorative portion are not connected to each other or electrically connected to other elements.

[0007] According to an embodiment of the electrostatic detection input device, it is possible to reduce manufacturing costs and increase the detection sensitivity of touch inputs.

[0008] FIG. 1 is a perspective view of an external appearance of an electrostatic detection type input device according to one embodiment; FIG. 2 is an exploded perspective view of an electrostatic detection type input device according to one embodiment; FIG. 3 is a perspective sectional view showing a cross section in the YZ plane of an electrostatic detection type input device according to one embodiment; FIG. 4 is a plan view of an input member provided in an electrostatic detection type input device according to one embodiment; FIG. 5 is a plan view of a sensor sheet provided in an electrostatic detection type input device according to one embodiment; FIG. 6 is a view showing a positional relationship between an electrode section of a sensor sheet provided in an electrostatic detection type input device according to one embodiment and an operation area; FIG. 7 is a view showing a positional relationship between a decorative section of an input member provided in an electrostatic detection type input device according to one embodiment and an operation area;FIG. 1 is a diagram illustrating a situation in which capacitive coupling is formed between a decorative portion and an electrode portion. FIG. 2 is a diagram illustrating a detection result when a touch input is made to an operation area of ​​an electrostatic detection type input device according to an embodiment. FIG. 3 is a diagram illustrating a detection result when a touch input is made to an operation area of ​​a first modified example of an electrostatic detection type input device according to an embodiment. FIG. 4 is a diagram illustrating a detection result when a touch input is made to an operation area of ​​an electrostatic detection type input device according to a comparative example 1. FIG. 5 is a diagram illustrating a detection result when a touch input is made to an operation area of ​​an electrostatic detection type input device according to a comparative example 2. FIG. 6 is a diagram illustrating a detection result when a touch input is made to an operation area of ​​an electrostatic detection type input device according to a comparative example 3. FIG. 7 is a plan view showing an input member provided in a first modified example of an electrostatic detection type input device according to an embodiment. 10 is a plan view showing an input member provided in a third modified example of an electrostatic detection type input device according to the embodiment; 11 is a plan view showing an input member provided in a fourth modified example of an electrostatic detection type input device according to the embodiment; 12 is a plan view showing an input member provided in a fifth modified example of an electrostatic detection type input device according to the embodiment; 13 is a plan view showing an input member provided in a sixth modified example of an electrostatic detection type input device according to the embodiment; 14 is a plan view showing an input member provided in a seventh modified example of an electrostatic detection type input device according to the embodiment; 15 is a plan view showing an input member provided in an eighth modified example of an electrostatic detection type input device according to the embodiment; 16 is a plan view showing an input member provided in a ninth modified example of an electrostatic detection type input device according to the embodiment;

[0009] An embodiment will be described below with reference to the drawings. For convenience, in the following description, the Z-axis direction in the drawings is the up-down direction, the Y-axis direction in the drawings is the left-right direction, and the X-axis direction in the drawings is the front-rear direction. However, the positive Z-axis direction is the up direction, the positive Y-axis direction is the right direction, and the positive X-axis direction is the front.

[0010] (Configuration of electrostatic detection type input device 100) Fig. 1 is an external perspective view of the electrostatic detection type input device 100 according to one embodiment. Fig. 2 is an exploded perspective view of the electrostatic detection type input device 100 according to one embodiment. Fig. 3 is a perspective cross-sectional view showing a cross section of the electrostatic detection type input device 100 according to one embodiment along the YZ plane.

[0011] 1 to 3 is an input device that is mounted on a vehicle such as an automobile and electrically controls devices to be controlled by the vehicle (e.g., audio equipment, navigation equipment, air conditioners, power seats, power mirrors, etc.). However, the electrostatic detection input device 100 is not limited to this, and may also be used to control equipment other than vehicles (e.g., game consoles, airplanes, railroad cars, remote controls, etc.). The electrostatic detection input device 100 has a function to detect electrostatic input and a function to detect pressure input performed on a touch input surface 120A of a knob member 120 (hereinafter referred to as the input-receiving member 120).

[0012] As shown in FIGS. 1 to 3 , the electrostatic detection input device 100 has a touch input surface 120A on the top surface of a case 110 that accepts touch input from an operator's finger 10 (an example of an "operating object"). The electrostatic detection input device 100 has a sensor sheet 130 provided inside the case 110 that detects the content of the touch input made on the touch input surface 120A and generates an analog signal. The sensor sheet 130 transmits the analog signal to a substrate 160, which processes the analog signal and converts it into a digital signal suitable for transmission and reception. The digital signal generates a detection signal that indicates the content of the touch input (touch position, capacitance value, etc.). By transmitting the detection signal from the substrate 160, it can be output to a device to be controlled outside the electrostatic detection input device 100.

[0013] As shown in FIGS. 1 to 3, the electrostatic detection input device 100 includes a case 110, an input-receiving member 120, a sensor sheet 130, a holder 140, a panel 150, a substrate 160, and a cover 170.

[0014] Case 110 is a resin container-like member having a generally rectangular parallelepiped shape and a hollow structure. Case 110 has an upper opening 110A that is rectangular in plan view from above (positive direction of the Z axis) at a portion corresponding to the top surface of case 110, and a lower opening 110B that is rectangular in plan view from below (negative direction of the Z axis) at a portion corresponding to the bottom surface of case 110.

[0015] The case 110 accommodates each component of the electrostatic detection input device 100 in an internal space 111. A horizontal, flat partition plate 112 is provided in the internal space 111 of the case 110 at a midpoint in the up-down direction (Z-axis direction). This divides the internal space 111 of the case 110 into an upper space 111A above the partition plate 112 (positive side of the Z-axis) and a lower space 111B below the partition plate 112 (negative side of the Z-axis).

[0016] The input-receiving member 120 is a generally flat resin member that is disposed in the upper opening 110A of the case 110 at the top of the electrostatic detection input device 100 so as to close the upper opening 110A. The input-receiving member 120 has a rectangular upper surface when viewed from above (positive direction of the Z axis), and this upper surface serves as a touch input surface 120A that receives touch input by the operator's finger 10. The detailed configuration of the touch input surface 120A will be described later with reference to FIG. 4.

[0017] The sensor sheet 130 is a sheet-like member that is provided under the input-receiving member 120 in the upper opening 110A of the case 110. The sensor sheet 130 has a rectangular shape when viewed from above (positive Z-axis direction). The sensor sheet 130 detects touch input made by the operator's finger 10 on the touch input surface 120A of the input-receiving member 120 using an electrostatic detection method. The sensor sheet 130 has a strip-shaped connection portion 131 extending from the outer edge of the rear side (negative X-axis side). The connection portion 131 is connected to the substrate 160. The sensor sheet 130 has nine electrode portions E1 to E9 (see FIG. 5 ). The sensor sheet 130 has wiring portions (not shown) that connect each of the electrode portions E1 to E9 to the substrate 160, and the wiring portions are bundled and arranged at the connection portion 131. The sensor sheet 130 outputs a detection signal indicating the content of the detected touch input (touch position, capacitance value, etc.) to the substrate 160. The detailed configuration of the sensor sheet 130 will be described later with reference to FIG.

[0018] The holder 140 is a block-shaped resin member that is arranged below the sensor sheet 130 in the upper space 111A of the case 110. The holder 140 has a horizontal, planar upper surface that serves as a mounting surface 141 on which the sensor sheet 130 and the input-receiving member 120 are placed. The sensor sheet 130 and the input-receiving member 120 are placed on the mounting surface 141, thereby supporting the sensor sheet 130 and the input-receiving member 120.

[0019] Holder 140 is provided in upper space 111A of case 110 so as to be movable up and down in the vertical direction (Z-axis direction). Guide ribs 142 extending linearly in the vertical direction (Z-axis direction) are provided to protrude from each of the right (Y-axis positive side) and left (Y-axis negative side) side surfaces of holder 140. Guide ribs 142 fit into linear guide grooves 113 provided on the inner wall surfaces of each of the right (Y-axis positive side) and left (Y-axis negative side) sides of case 110 so as to protrude toward internal space 111 of case 110, and slide within guide grooves 113 in the vertical direction (Z-axis direction) to guide the raising and lowering of holder 140.

[0020] The holder 140 has a cylindrical pressing portion 143 that hangs down (in the negative direction of the Z axis) from the bottom surface 140A. The pressing portion 143 passes through a through-hole 112B formed in the partition plate 112 of the case 110 and extends to a position above a push switch 161 that is provided on the top surface 160A of the substrate 160. When the input-receiving member 120 is pressed by the operator's finger 10, the holder 140 descends together with the input-receiving member 120 and the sensor sheet 130, and the pressing portion 143 can press the push switch 161.

[0021] The panel 150 is provided above the upper end of the case 110 (positive side of the Z axis) at the same height (position in the Z axis direction) as the input-receiving member 120, and is a rectangular frame-shaped resin member that surrounds the outer periphery of the input-receiving member 120. The panel 150 is fixed to the upper end of the case 110 by a snap-fit ​​structure. The panel 150 decorates the periphery of the input-receiving member 120. For this reason, the surface of the panel 150 is decorated with a metal plating look.

[0022] The substrate 160 is a flat, resin-made member provided horizontally in the lower space 111B of the case 110. For example, a PWB (Printed Wired Board) or the like can be used as the substrate 160. A push switch 161 is provided on the upper surface 160A of the substrate 160, below the pressing portion 143 provided on the holder 140. When the input-receiving member 120 is pressed by the operator's finger 10 and the holder 140 descends together with the input-receiving member 120, the push switch 161 is pressed by the lower end surface of the pressing portion 143, and outputs a pressing detection signal indicating that the input-receiving member 120 has been pressed.

[0023] Cover 170 is a tray-shaped member made of resin that is attached to the bottom surface of case 110 to close lower opening 110B of case 110. Cover 170 is fixed to lower surface 112A of partition plate 112 of case 110 with a plurality of screws (not shown).

[0024] (Detailed Configuration of Touch Input Surface 120A) FIG. 4 is a plan view of the input-receiving member 120 included in the electrostatic detection input device 100 according to one embodiment. FIG. 5 is a plan view of the sensor sheet 130 included in the electrostatic detection input device 100 according to one embodiment. FIG. 6A is a diagram showing the positional relationship between the electrode sections E1 to E9 of the sensor sheet 130 included in the electrostatic detection input device 100 according to one embodiment and the operation areas A1 to A9. FIG. 6B is a diagram showing the positional relationship between the decorative sections (124-1 to 124-4) of the input-receiving member included in the electrostatic detection input device 100 according to one embodiment and the operation areas A1 to A9. Note that in FIG. 4, in order to make it easier to understand the range of the elements that make up the input-receiving member 120, the outlines of the first decorative section 124-1, the second decorative section 124-2, the third decorative section 124-3, and the fourth decorative section 124-4 are each displayed with a thick line.

[0025] As shown in Figures 3 and 4, the touch input surface 120A of the input receiving member 120 has a horizontal (i.e., parallel to the sensor sheet 130) planar base 121 and a bank portion 122 that is approximately cross-shaped in plan view and protrudes from the base 121.

[0026] The bank portion 122 has an upper portion 122A and a side portion 122B. The upper portion 122A is a generally horizontal (i.e., generally parallel to the sensor sheet 130) flat plate-like portion spaced upward (in the positive direction of the Z axis) from the base portion 121.

[0027] The side surface portion 122B connects the upper stage portion 122A and the base portion 121 and has an inclined surface shape that is inclined with respect to the base portion 121.

[0028] 4, the touch input surface 120A of the input receiving member 120 has nine operation areas A1 to A9. The operation areas A1 to A9 are arranged in a matrix having three rows in the front-to-back direction (X-axis direction) and three columns in the left-to-right direction (Y-axis direction) when viewed in a plan view from above (positive direction of the Z-axis).

[0029] As shown in FIG. 4 , design portions 123-1 to 123-9, which represent characters, figures, or the like recognizable by the operator, are formed on the touch input surface 120A of the input-receiving member 120 so as to overlap each of the nine operation areas A1 to A9. In this embodiment, as an example, numbers "1" to "9" corresponding to the numbering of each operation area are displayed in the center of the operation areas A1 to A9. In the following description, these displays will be referred to as design portions 123-1 to 123-9. The input-receiving member 120 has a translucent white synthetic resin molded body and an opaque coating film, such as black, formed by painting or the like on the upper surface (positive Z-axis direction) of the molded body. The design portions 123-1 to 123-9 are formed by burning away part of the opaque coating film using means such as laser processing, exposing the white synthetic resin.

[0030] Operation areas A1, A3, A7, and A9 are provided on the base 121. Specifically, in a plan view from above (positive direction of the Z axis), operation area A1 is an area provided in the front left corner of the touch input surface 120A on the base 121. In a plan view, the external dimensions of operation area A1 are approximately the same as the external dimensions of electrode unit E1 shown in Fig. 5 and are slightly larger than electrode unit E1, and are set at a position overlapping electrode unit E1.

[0031] 4, the operation area A3 is a substantially rectangular area provided in the left rear corner of the touch input surface 120A in the base 121. When viewed in plan, the external dimensions of the operation area A3 are substantially the same as those of the electrode portion E3 shown in Fig. 5, but are slightly larger than those of the electrode portion E3, and the operation area A3 is positioned so as to overlap with the electrode portion E3.

[0032] Operation areas A7 and A9 are symmetrical to operation areas A1 and A3 with respect to the X axis, and the relative positional and dimensional relationships with the corresponding electrode portions E7 and E9 are also the same. Therefore, for the sake of brevity, detailed explanations of operation areas A7 and A9 will be omitted below.

[0033] The operation areas A2, A4 to A6, and A8 are provided on the upper stage 122A of the bank portion 122.

[0034] As shown in Fig. 4, operation area A5 is a substantially rectangular area provided in the center of upper section 122A. Although operation area A5 is surrounded by a circle for design purposes, it is substantially rectangular like the other operation areas, and when viewed from above, it has approximately the same external dimensions as electrode section E5 shown in Fig. 5, and is set in a position that overlaps electrode section E5.

[0035] 4, operation area A6 is a generally rectangular area located in the upper section 122A, rearward (toward the negative X-axis) of the center (operation area A5) and midway between the operation areas A3 and A9. In plan view, operation area A6 has approximately the same external dimensions as, but slightly larger than, the electrode unit E6 shown in FIG. 5, and is positioned so as to overlap with the electrode unit E6.

[0036] The operation areas A2, A4, A6, and A8 are each provided point-symmetrically with respect to one another in the up-down and left-right directions with respect to the center (operation area A5), and the relative positional and dimensional relationships with the corresponding electrode portions E2, E4, E6, and E8 are also the same. Therefore, for the sake of simplicity, detailed explanations of the operation areas A2, A4, and A8 will be omitted below.

[0037] 4, the touch input surface 120A has a first decorative portion 124-1, a second decorative portion 124-2, a third decorative portion 124-3, and a fourth decorative portion 124-4 on a side surface portion 122B between the base portion 121 and the upper portion 122A. In addition, gaps 126-1, 126-2, 126-3, and 126-4 are provided between the respective decorative portions on the side surface portion 122B.

[0038] The first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 are portions where a thin film made of a conductive material is formed, and in this embodiment, they are made of a metal plating layer. A gap 126-1 is provided between the first decorative portion 124-1 and the second decorative portion 124-2. A gap 126-3 is provided between the second decorative portion 124-2 and the third decorative portion 124-3. A gap 126-2 is provided between the third decorative portion 124-3 and the fourth decorative portion 124-4. A gap 126-4 is provided between the fourth decorative portion 124-4 and the first decorative portion 124-1. In this embodiment, the gaps 126-1, 126-2, 126-3, and 126-4 do not have the metal plating layer that constitutes the decorative portion. The gaps 126-1, 126-2, 126-3, and 126-4 are elements for electrically insulating the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 from each other.

[0039] As shown in FIGS. 4, 5, 6A, and 6B, the first decorative portion 124-1 is provided so as to overlap a portion of the electrode portion E4 of the sensor sheet 130 when viewed from above (positive direction of the Z axis). The first decorative portion 124-1 is an example of a "first decorative portion." The electrode portion E4 is an example of a "first electrode portion." The operation area A4 is an example of a "first operation area." The first decorative portion 124-1 is disposed in a position overlapping with the operation area A4. In this embodiment, the operation area A4 has a rectangular shape, and the first decorative portion 124-1 is provided along three sides of the outer contour of the operation area A4. Therefore, the first decorative portion 124-1 has a shape that is a roughly upside-down U-shape when viewed from above (positive direction of the Z axis).

[0040] The second decorative portion 124-2 is provided so as to overlap a portion of the electrode portion E8 of the sensor sheet 130 when viewed from above (positive direction of the Z axis). The second decorative portion 124-2 is an example of a "second decorative portion." The operation area A8 is an example of a "second operation area." The electrode portion E8 is an example of a "second electrode portion." The second decorative portion 124-2 is disposed in a position overlapping with the operation area A8. In this embodiment, the operation area A8 has a rectangular shape, and the second decorative portion 124-2 is provided along three sides of the outer contour of the operation area A8. Therefore, the second decorative portion 124-2 has an inverted, approximately C-shape when viewed from above (positive direction of the Z axis).

[0041] The gap 126-1 is provided between the first decorative portion 124-1 and the second decorative portion 124-2. The gap 126-1 insulates the first decorative portion 124-1 from the second decorative portion 124-2.

[0042] The third decorative portion 124-3 is provided in a point-symmetrical shape with the first decorative portion 124-1 with respect to the center (operation area A5) of the bank portion 122. The third decorative portion 124-3 is an example of a "third decorative portion."

[0043] The fourth decorative portion 124-4 is provided in a point-symmetrical shape with the second decorative portion 124-2 with respect to the center (operation area A5) of the bank portion 122. The fourth decorative portion 124-4 is an example of a "fourth decorative portion."

[0044] Electrode portion E7 is provided in a point-symmetrical shape with electrode portion E3 and electrode portion E5, which is provided in the center of sensor sheet 130. Electrode portion E7 is an example of a "third electrode portion." The left side (negative side of the Y axis) of electrode portion E7 and the right side (positive side of the Y axis) of electrode portion E4 are arranged parallel to and opposite each other. The rear side (negative side of the X axis) of electrode portion E7 and the front side (positive side of the X axis) of electrode portion E8 are arranged parallel to and opposite each other.

[0045] The gap 126-2 is provided between the third decorative portion 124-3 and the fourth decorative portion 124-4. The gap 126-2 insulates the third decorative portion 124-3 from the fourth decorative portion 124-4.

[0046] The gap 126-3 is provided between the second decorative portion 124-2 and the third decorative portion 124-3. The gap 126-3 insulates the second decorative portion 124-2 from the third decorative portion 124-3.

[0047] The gap 126-4 is provided between the first decorative portion 124-1 and the fourth decorative portion 124-4. The gap 126-4 insulates the first decorative portion 124-1 from the fourth decorative portion 124-4.

[0048] In plan view from above (positive Z-axis direction), the imaginary lines connecting the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 form a cross-shaped outline.

[0049] (Detailed Configuration of Sensor Sheet 130) In plan view from above (positive direction of the Z axis), the input-receiving member 120 has nine operation areas A1 to A9, and the sensor sheet 130 has nine electrode portions E1 to E9 arranged in a matrix of three rows in the front-to-back direction (X axis direction) and three columns in the left-to-right direction (Y axis direction) on a base portion 132 that has a rectangular shape in plan view from above (positive direction of the Z axis). Note that the base portion 132 has a film shape formed using a translucent resin material.

[0050] Each of the nine electrodes E1 to E9 is made of a conductive material and formed into a thin film. Each of the nine electrodes E1 to E9 has a generally rectangular shape when viewed from above (positive Z-axis direction). Each of the nine electrodes E1 to E9 is arranged such that the input member 120 overlaps with a corresponding one of the nine operation areas A1 to A9 when viewed from above (positive Z-axis direction).

[0051] When a touch input is made to a corresponding operation area by the operator's finger 10, each of the nine electrode units E1 to E9 can generate a detection signal of the touch input by capacitively coupling with the operator's finger 10. Then, each of the nine electrode units E1 to E9 can output the generated detection signal to the substrate 160 via the connection unit 131.

[0052] The sensor sheet 130 has a translucent portion 133 formed by partially opening each of the nine electrode portions E1 to E9. As a result, the electrostatic detection input device 100 according to one embodiment can, for example, provide a light source (e.g., an LED) on the upper surface 160A of the substrate 160, and transmit light emitted from the light source through each of the plurality of translucent portions 133, thereby illuminating each of the nine operation areas A1 to A9 on the touch input surface 120A of the input-receiving member 120 with the light that has passed through the plurality of translucent portions 133. The translucent portions 133 are provided near the center of each of the electrode portions E1 to E9. The translucent portions 133 are not essential for solving the problem of the present application, and may therefore be omitted.

[0053] (Positional relationship between decorative portion and electrode portion) The operation area A4 shown in Fig. 6A and the operation area A4 shown in Fig. 6B have the same dimensions and are located in the same position. As shown in Figs. 6A and 6B, when viewed in a plan view from above (positive direction of the Z axis), the operation area A4 overlaps with the electrode portion E4. The operation area A4 also overlaps with the first decorative portion 124-1. The operation area A8 also overlaps with the electrode portion E8. The operation area A8 also overlaps with the second decorative portion 124-2. The operation area A7 also overlaps with the electrode portion E7.

[0054] The first decorative portion 124-1 is formed to overlap the operation area A4 when viewed from above (positive Z-axis direction). In this embodiment, the first decorative portion 124-1 only needs to overlap the operation area A4 when viewed from above (positive Z-axis direction), and may have a shape that slightly extends beyond the electrode portion E6. In this embodiment, the first decorative portion 124-1 and the second decorative portion 124-2 are provided as a combination of linear conductive patterns that all have a uniform width of 2 millimeters (an example of a predetermined width). However, the first decorative portion 124-1 only needs to be a conductive pattern that is easily visible, decorative, electrically insulated from other elements, and appears linear overall when viewed from above, and the line width does not need to be constant. The first decorative portion 124-1 and the second decorative portion 124-2 may be narrower or wider than 2 mm, and may have a width that varies at any position, or may be partially or entirely curved. For example, the first decorative portion 124-1 and the second decorative portion 124-2 may have an accordion shape, an arabesque pattern, or a ivy shape.

[0055] In the electrostatic detection input device 100 according to one embodiment, when a touch input is made to the operation area A4, a capacitive coupling is formed between the operator's finger 10 and the electrode portion E4. At the same time, a capacitive coupling is formed between the operator's finger 10 and the first decorative portion 124-1. At the same time, a capacitive coupling is formed between the first decorative portion 124-1 and the electrode portion E4.

[0056] Furthermore, the second decorative portion 124-2 provided on the input-receiving member 120 is arranged to overlap with the electrode portion E8 when viewed in a plan view from above (positive direction of the Z axis). When viewed in a plan view from above (positive direction of the Z axis), the electrode portion E8 arranged in a position overlapping with the operation area A8 and the second decorative portion 124-2 arranged in a position overlapping with the operation area A8 overlap and are arranged in the same position.

[0057] As a result, in the electrostatic detection input device 100 according to one embodiment, when a touch input is made to the operation area A8, a capacitive coupling is formed between the operator's finger 10 and the electrode portion E8. At the same time, a capacitive coupling is formed between the operator's finger 10 and the second decorative portion 124-2. At the same time, a capacitive coupling is formed between the second decorative portion 124-2 and the electrode portion E8.

[0058] In the electrostatic detection input device 100 according to one embodiment, the first decorative portion 124-1 and the second decorative portion 124-2 are not electrically connected to other elements such as a ground connection. That is, the first decorative portion 124-1 and the second decorative portion 124-2 are provided electrically independent. In other words, the first decorative portion 124-1 and the second decorative portion 124-2 are floating in potential. In yet another way, the nodes of the first decorative portion 124-1 and the second decorative portion 124-2 are floating.

[0059] In addition, in one embodiment of the electrostatic detection input device 100, the side portion 122B of the input member 120 on which the first decorative portion 124-1 and the second decorative portion 124-2 are provided has an inclined surface shape that is inclined with respect to the base portion 121 of the input member 120.

[0060] As a result, the electrostatic detection type input device 100 according to one embodiment can reduce the projected area of ​​the first decorative portion 124-1 and the second decorative portion 124-2 when viewed from above (positive Z-axis direction) compared to when the side surface portion 122B is flat and parallel to the base portion 121. As a result, the electrical influence generated by the first decorative portion 124-1 when a touch input is made in the operation area A4 can be relatively small compared to the actual area of ​​the first decorative portion 124-1. As a result, even if a dimensional mismatch occurs between the first decorative portion 124-1 and the electrode portion E4 due to production reasons, for example, the disturbance components generated by the mismatch can be reduced. This reduces the need to consider potential disadvantages in terms of manufacturing costs and management costs associated with the electrostatic detection type input device 100 according to one embodiment. Therefore, by providing the side portion 122B in an inclined direction relative to the base portion 121, it is possible to enhance the decorativeness of the input-receiving member 120 without fear of increasing manufacturing costs or management costs. Note that if the first decorative portion 124-1 and the electrode portion E4 are formed as designed, there is no possibility of this disturbance component occurring. The second decorative portion 124-2 also has the same functionality as the first decorative portion 124-1.

[0061] In the electrostatic detection input device 100 according to the embodiment, the side surface 122B is provided obliquely relative to the base 121, but the side surface 122B may be a vertical surface perpendicular to the base 121.

[0062] As a result, the electrostatic detection type input device 100 according to one embodiment can reduce the projected areas of the first decorative portion 124-1 and the second decorative portion 124-2 to zero when viewed from above (positive direction of the Z axis). That is, the electrostatic detection type input device 100 according to one embodiment can reduce the capacitive coupling between the first decorative portion 124-1 and the electrode portion E4 to nearly zero. Furthermore, the capacitive coupling between the second decorative portion 124-2 and the electrode portion E8 to nearly zero. Therefore, with the electrostatic detection type input device 100 according to one embodiment, there is no need to worry about disturbance components that may be generated by the first decorative portion 124-1 and the second decorative portion 124-2.

[0063] The third decorative portion 124-3 is provided so as to overlap a portion of the electrode portion E6 when viewed from above (positive direction of the Z axis).

[0064] In particular, the third decorative portion 124-3 is formed to overlap the operation area A6 when viewed from above (positive direction of the Z axis).

[0065] As a result, in the electrostatic detection input device 100 according to one embodiment, when a touch input is made to the operation area A6 corresponding to the electrode unit E6, a capacitive coupling is formed between the operator's finger 10 and the third decorative unit 124-3. At the same time, a capacitive coupling is formed between the third decorative unit 124-3 and the electrode unit E6. In other words, since the number of paths along which a capacitive coupling is formed increases compared to when the third decorative unit 124-3 is not present, the detection sensitivity of the touch input by the electrode unit E6 increases.

[0066] Furthermore, the fourth decorative portion 124-4 provided on the input-receiving member 120 is provided so as to overlap the operation area A2 when viewed from above (positive direction of the Z axis) in a plan view.

[0067] As a result, in the electrostatic detection input device 100 according to one embodiment, when a touch input is made to the operation area A2 corresponding to the electrode unit E2, a capacitive coupling is formed between the operator's finger 10 and the fourth decorative unit 124-4. At the same time, a capacitive coupling is formed between the fourth decorative unit 124-4 and the electrode unit E2. In other words, since the number of paths along which a capacitive coupling is formed increases compared to when the fourth decorative unit 124-4 is not present, the detection sensitivity of the touch input by the electrode unit E2 increases.

[0068] In the electrostatic detection input device 100 according to one embodiment, the third decorative portion 124-3 and the fourth decorative portion 124-4 are not electrically connected to other elements such as a ground connection. That is, the third decorative portion 124-3 and the fourth decorative portion 124-4 are provided electrically independent. In other words, the third decorative portion 124-3 and the fourth decorative portion 124-4 are floating in potential. In yet another way, the nodes of the third decorative portion 124-3 and the fourth decorative portion 124-4 are floating.

[0069] In addition, in one embodiment of the electrostatic detection input device 100, the side portion 122B of the input member 120 on which the third decorative portion 124-3 and the fourth decorative portion 124-4 are provided has an inclined surface shape that is inclined with respect to the base portion 121 of the input member 120.

[0070] (Example of Capacitive Coupling) Figure 7A is a diagram illustrating a situation in which capacitive coupling is formed between the electrode unit E1 and the operator's finger 10 when a touch input is performed on the operation area A1 of the electrostatic detection input device 100 according to an embodiment. Figure 7B is a diagram illustrating a situation in which capacitive coupling is formed between the electrode unit E2 and the operator's finger 10, between the decorative unit 124-2 and the operator's finger 10, and between the decorative unit 124-2 and the electrode unit E2 when a touch input is performed on the operation area A2 of the electrostatic detection input device 100 according to an embodiment. Figure 7C is a diagram illustrating a situation in which capacitive coupling is formed between the electrode unit E2 and the operator's finger 10 and between the decorative unit 124-2 and the electrode unit E2 when a touch input is performed on the operation area A2 of the electrostatic detection input device 100 according to an embodiment, under conditions in which the decorative unit 124-2 comes into contact with the operator's finger 10.

[0071] As shown in Fig. 7A , when a touch input is made to operation area A1, which is less affected by the decorative portion, capacitive coupling is formed between electrode portion E1 and the operator's finger 10. Note that, for convenience, Fig. 7A is numbered as if a touch input was made to operation area A1, but capacitive coupling is also formed when a touch input is made to operation areas A3, A7, and A9.

[0072] 7B , when a touch input is performed on operation area A2, which is close to decorative portion 124-2 and is greatly affected by decorative portion 124-2, not only is capacitive coupling formed between electrode portion E2 and the operator's finger 10, but capacitive coupling is also formed via decorative portion 124-2. That is, capacitive coupling is formed between decorative portion 124-2 and the operator's finger 10, and between decorative portion 124-2 and electrode portion E2.

[0073] As shown in Figure 7C, when touch input is performed and the decorative part 124-2 comes into contact with the finger 10, a capacitive coupling is formed between the electrode part E2 and the operator's finger 10, and a capacitive coupling is also formed between the decorative part 124-2 and the electrode part E2.

[0074] For convenience, Figures 7B and 7C are numbered as compositions in which a touch input is made to operation area A2, but capacitive coupling is also formed when a touch input is made to operation areas A4, A6, and A8.

[0075] (Theoretical Formula for Coupling Capacity of Capacitive Coupling) The capacitive coupling involving the decorative portion and its coupling capacitance will be described below. Using the symbols shown in FIGS. 7B and 7C, the coupling capacitance of the capacitive coupling formed between the electrode portion E2 and the operator's finger 10 will be referred to as Cfinger-electrode, and the coupling capacitance of the capacitive coupling formed between the decorative portion 124-2 and the operator's finger 10 will be referred to as Cfinger-plating. Furthermore, the coupling capacitance of the capacitive coupling formed between the decorative portion 124-2 and the electrode portion E2 will be referred to as Cplating-electrode. Note that the size of Cplating-electrode varies depending on the shape and arrangement of the decorative portion 124-2.

[0076] In the situation shown in FIG. 7B, the coupling capacitance (C) of the capacitive coupling formed between the finger 10 and the detection electrode E2 is calculated by the following formula (1).

[0077] C=((Cfinger-plating×Cplating-electrode) / (Cfinger-plating+Cplating-electrode))+Cfinger-electrode...(1)

[0078] According to formula (1), when the electrostatic detection unit has a decorative portion, the magnitude of the capacitive coupling (C) is necessarily larger than Cfinger-electrode.

[0079] (How to read the graph of the differential capacitance detection value of the capacitance detection circuit) FIG. 8A is a diagram showing the detection result when a touch input is made to the operation areas A1 to A9 of the electrostatic detection type input device 100 according to one embodiment. FIG. 8B is a diagram showing the detection result when a touch input is made to the operation areas A1 to A9 of a first modified example of the electrostatic detection type input device 100 according to one embodiment. FIG. 8C is a diagram showing the detection result when a touch input is made to the operation areas A1 to A9 of the electrostatic detection type input device 200 of Comparative Example 1 shown in FIG. 18. FIG. 8D is a diagram showing the detection result when a touch input is made to the operation areas A1 to A9 of the electrostatic detection type input device 300 of Comparative Example 2 shown in FIG. 19. FIG. 8E is a diagram showing the detection result when a touch input is made to the operation areas A1 to A9 of the electrostatic detection type input device 400 of Comparative Example 3 shown in FIG. 20.

[0080] Note that Fig. 8A is made up of nine graphs (Fig. 8A(1) to Fig. 8A(9)) that are the results of input operations performed on each of the nine operation areas A1 to A9. Fig. 8A(1) to Fig. 8A(9) correspond to the positions of the operation areas A1 to A9 where the input operations were performed, and are arranged in a 3 x 3 matrix following the arrangement of the nine operation areas A1 to A9 on the touch input surface 120A. Note that Fig. 8B to Fig. 8E are displayed in the same manner as Fig. 8A.

[0081] 8A to 8E, each of the nine graphs shows the detection values ​​of each of the nine electrode units E1 to E9 when a touch input is made to the corresponding operation area.

[0082] FIG. 8A (1) is a bar graph summarizing the evaluation values ​​of detection sensitivity when a touch input is performed on the operation area A1 of the electrostatic detection input device 100 according to one embodiment. More specifically, the leftmost bar graph (E1) of the nine bar graphs constituting FIG. 8A (1) is a bar graph showing an evaluation value (480 pF) calculated based on the value detected from the electrode unit E1 when a touch input is performed on the operation area A1 of the electrostatic detection input device 100 according to one embodiment. This evaluation value is the difference between the capacitance value detected from the electrode unit E1 when the finger 10 and the operation area A1 of the input member 120 are sufficiently separated from each other in a non-contact state, and the capacitance value detected from the electrode unit E1 when the finger 10 and the operation area A1 of the input member 120 are in contact with each other. This evaluation was performed by AD-converting and recording the capacitance value actually detected from the electrode unit E1, and then substituting the recorded value into a function for calculation. The same evaluation was performed for each of the electrode parts E2 to E9, and the evaluation results for the electrode parts E1 to E9 were summarized and shown in FIG. 8A(1).

[0083] Note that, since units are not usually assigned to capacitance values ​​after AD conversion, the recorded values ​​obtained by AD converting the capacitance values ​​detected from the electrodes E1 to E9 and their differences are properly unitless. However, in order to show the results in bar graphs, for convenience, the units of the vertical axes of the bar graphs in Figures 8A to 8E are set to "differential capacitance detection value [pF] of the capacitance detection circuit."

[0084] Furthermore, when touch input was performed on each of the operation areas A2 to A9, a similar evaluation to that of FIG. 8A(1) was performed to create FIGS. 8A(2) to 8A(9). The layout was then adjusted, and the layout of FIGS. 8A(1) to 8A(9) was arranged to mirror the layout of the operation areas A1 to A9, resulting in the diagrams of FIG. 8A(1) to 8A(9) being combined into a single block of data. As a result, these nine diagrams provide data that allows users to visually understand which of the electrodes E1 to E9 responds when a touch input is performed on one of the operation areas A1 to A9. Furthermore, these nine diagrams provide data that allows users to intuitively understand the degree of conflict and the positional information of the electrodes that generated the conflicting signals, for example, when some of the signals detected from the electrodes E1 to E9 conflict with each other.

[0085] 8B(1) to 8B(9) are bar graphs showing the results of evaluations similar to those in FIG. 8A(1) to FIG. 8A(9) performed on a first variant of the electrostatic detection input device 100 according to one embodiment.

[0086] 8C(1) to 8C(9) are bar graphs showing the results of evaluations similar to those in FIGS. 8A(1) to 8A(9) performed on the electrostatic detection type input device 200 of Comparative Example 1.

[0087] 8D(1) to 8D(9) are bar graphs showing the results of evaluations similar to those in FIGS. 8A(1) to 8A(9) performed on the electrostatic detection type input device 300 of Comparative Example 2.

[0088] 8E(1) to 8E(9) are bar graphs showing the results of evaluations similar to those in FIGS. 8A(1) to 8A(9) performed on the electrostatic detection type input device 300 of Comparative Example 3.

[0089] (Characteristics of Comparative Example 1) Comparative Example 1 is an example of an electrostatic detection type input device that may encounter problems such as erroneous determination. As shown in FIG. 18 , the electrostatic detection type input device 200 of Comparative Example 1 has a continuous, linear decorative portion 224 with no gaps. The decorative portion 224 is formed of a plating layer made of a conductive material and passes through each of the operation areas A2, A4, A6, and A8. The decorative portion 224 is also disposed adjacent to the operation areas A1, A3, A7, and A9. The electrostatic detection type input device 200 of Comparative Example 1 has a similar configuration to the electrostatic detection type input device 100, except for the shape of the decorative portion 224. As shown in FIGS. 8C(2), 8C(4), 8C(6), and 8C(8), the electrostatic detection type input device 200 of Comparative Example 1 frequently encounters erroneous determinations and does not function properly as an input device due to the signals detected from the electrodes competing with each other, and the degree of competition is severe. To explain this problem using FIG. 8C (8) as an example, the detected differential capacitance value at electrode E8, which corresponds to operation area A8 where touch input is performed, is 260 pF. In contrast, the detected differential capacitance value at electrode E2 is 100 pF, the detected differential capacitance value at electrode E4 is 164 pF, the detected differential capacitance value at electrode E5 is 88 pF, and the detected differential capacitance value at electrode E6 is 140 pF. The detected differential capacitance value at electrode E7 is 108 pF, and the detected differential capacitance value at electrode E9 is 124 pF. In particular, the detected differential capacitance value at electrode E4 (164 pF) is proportionally closer to the detected differential capacitance value at electrode E8 (260 pF), making it difficult to determine the touch input position using a threshold-based determination method. It is believed that this defect occurs because the shape of the decorative portion 224 is inappropriate, resulting in the formation of capacitive coupling in the manner shown in FIG. 7C at the electrode portions E2, E4, E5, E6, E7, and E9.

[0090] (Characteristics of Comparative Example 2) Comparative Example 2 is also an example of an electrostatic detection type input device that may encounter problems such as erroneous determination. The electrostatic detection type input device 300 of Comparative Example 2 has a decorative portion 324 without gaps, as shown in FIG. 19 . The electrostatic detection type input device 300 of Comparative Example 2 has the same configuration as the electrostatic detection type input device 100, except for the shape of the decorative portion. The decorative portion 324 is formed by a plating layer made of a conductive material and passes through each of the operation areas A2, A4, A6, and A8. The electrostatic detection type input device 200 of Comparative Example 1 has the same configuration as the electrostatic detection type input device 100, except for the shape of the decorative portion 224. As shown in FIGS. 8D(2), 8D(4), 8D(6), and 8D(8), the electrostatic detection type input device 200 of Comparative Example 2 frequently encounters erroneous determinations and does not function properly as an input device due to the signals detected from the electrodes competing with each other, and the degree of competition is severe.

[0091] (Characteristics of Comparative Example 3) Comparative Example 3 is an electrostatic detection type input device without a decorative portion prepared for reference. As shown in FIG. 20 , the electrostatic detection type input device 400 of Comparative Example 3 does not have a decorative portion. The electrostatic detection type input device 400 of Comparative Example 3 has the same configuration as the electrostatic detection type input device 100 except for the absence of a decorative portion. As shown in FIGS. 8E(1) to 8E(9), the electrostatic detection type input device 400 of Comparative Example 3 does not have any notable defects as an electrostatic detection type input device. For example, as shown in FIG. 8E(8), when a touch input is performed on the operation area A8 of the electrostatic detection type input device 400, a differential capacitance detection value of approximately 204 pF is detected from the electrode portion E8. Note that, due to the absence of a decorative portion, the electrostatic detection type input device 400 of Comparative Example 3 is inferior in design compared to the other electrostatic detection type input devices described in this specification.

[0092] (Characteristics of the Electrostatic Detection Input Device 100) The detection sensitivity of the electrostatic detection input device 100 will now be described as an effect of the present invention. As shown in FIG. 8A (8), when a touch input is performed on operation area A8 of the electrostatic detection input device 100, a differential capacitance detection value of approximately 316 pF is detected from electrode E8. At the same time, a differential capacitance detection value of approximately 80 pF is detected from electrode E7, and a differential capacitance detection value of approximately 96 pF is detected from electrode E9. However, the magnitude of the signals detected from electrodes E7 and E9 is significantly smaller than the magnitude of the signal detected from electrode E8. Therefore, the signals detected from electrodes E7 and E9 shown in FIG. 8A (8) do not interfere with determining the position of the touch input (operation area A8) using a threshold-based determination method. Furthermore, no signal conflicts that would hinder a threshold-based determination method are observed in FIGS. 8A (1) to 8A (7) and 8A (9). This tendency indicates that the decorative portion of the electrostatic detection type input device 100 does not induce any disturbance components, or that the disturbance components induced by the decorative portion of the electrostatic detection type input device 100 are very small.

[0093] Furthermore, the differential capacitance detection value (316 pF) detected from electrode portion E8 in FIG. 8A (8) is clearly larger than the differential capacitance detection value (204 pF) detected from electrode portion E8 in FIG. 8C (8). Because the measurements of the differential capacitance detection values ​​(pF) of the capacitance detection circuits described herein were all performed under the same conditions, this difference indicates that the detection sensitivity of the electrostatic detection input device 100 is approximately 50% higher than that of the electrostatic detection input device 400 of Comparative Example 3. Similarly to FIG. 8C (8), FIGS. 8A (2), 8A (4), and 8 (6) also show a tendency for the detection sensitivity to be increased compared to that of the electrostatic detection input device 400 of Comparative Example 3. This tendency indicates that the provision of the decorative portion increases the touch detection sensitivity of the electrostatic detection input device 100, as confirmed by the theory using Equation (1).

[0094] 8B(8), when a touch input is performed on operation area A8 of the first modified example of the electrostatic detection type input device 100, a differential capacitance detection value of approximately 352 [pF] is detected from electrode unit E8. At this time, no signal is generated from any electrode unit other than electrode unit E8, so no conflict occurs.

[0095] Furthermore, the differential capacitance detection value (352 pF) detected from the electrode portion E8 in FIG. 8B(8) is clearly larger than the differential capacitance detection value (204 pF) detected from the electrode portion E8 in FIG. 8C(8). Furthermore, the differential capacitance detection value (352 pF) detected from the electrode portion E8 in FIG. 8B(8) is also clearly larger than the differential capacitance detection value (316 pF) detected from the electrode portion E8 in FIG. 8A(8). This characteristic is presumably due to the fact that the entire shape of the second decorative portion 124-2 is a closed ring, as shown in FIG. 9, which makes the Cplating-electrode in formula (1) relatively large.

[0096] (First to third modified examples of input-receiving member 120) Fig. 9 is a plan view showing the input-receiving member 120 provided in a first modified example of the electrostatic detection type input device 100 according to an embodiment. Fig. 10 is a plan view showing the input-receiving member 120 provided in a second modified example of the electrostatic detection type input device 100 according to an embodiment. Fig. 11 is a plan view showing the input-receiving member 120 provided in a third modified example of the electrostatic detection type input device 100 according to an embodiment.

[0097] 9 to 11, for the sake of convenience, the outlines of the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 are shown with thicker lines.

[0098] 4, the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 surround the corresponding operation area on three sides. Each of the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 has a shape (approximately U-shaped) in which the portion on the central side of the upper stage portion 122A (i.e., the portion on the operation area A5 side) is interrupted.

[0099] On the other hand, as shown in FIG. 9 , in the input-receiving member 120 of the first modified example, the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 are each continuous at the central portion of the upper stage portion 122A (i.e., the portion on the operation area A5 side). That is, the first decorative portion 124-1 has a closed shape (approximately rectangular) that surrounds the operation area R1 on all four sides. In other words, the first decorative portion 124-1 is provided in a closed annular shape. The second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 have shapes similar to the first decorative portion 124-1.

[0100] 10 , in the input-receiving member 120 according to the second modification, each of the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 is generally U-shaped overall, but has a shape in which one side opposite the center side of the upper stage portion 122A (i.e., the operation area A5 side) is partially interrupted. In a plan view, an imaginary line connecting the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 according to the second modification forms a generally cross-shaped outline.

[0101] 11 , in the input-receiving member 120 according to the third modification, the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 are each generally U-shaped, but each of the three sides surrounding the corresponding operation area on three sides has a partially interrupted shape. In a plan view, the imaginary lines connecting the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 according to the third modification form an outline of a substantially cross shape.

[0102] In addition, each of the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4 is not limited to having an approximately U-shape when viewed in a plan view from above, but may also have an approximately V-shape or an approximately C-shape.

[0103] (Fourth Modification of Input-Receiving Member 120) FIG. 12 is a plan view showing a fourth modification of the input-receiving member 120 provided in the electrostatic detection type input device 100 according to an embodiment.

[0104] In FIG. 12, for the sake of convenience, the outlines of the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, the fourth decorative portion 124-4, and the insulating member 129 are shown with thicker lines.

[0105] 12 , the input-receiving member 120 according to the fourth modification has an insulating member 129 made of an insulating material provided between two adjacent decorative portions, thereby insulating the two adjacent decorative portions. The insulating member 129 is formed in the gaps 126-1, 126-2, 126-3, and 126-4. It is preferable that the insulating member 129 visually has a color similar to that of the material constituting the first decorative portion 124-1, the second decorative portion 124-2, the third decorative portion 124-3, and the fourth decorative portion 124-4.

[0106] As a result, the input-receiving member 120 according to the fourth modification has two adjacent decorative portions that are electrically separated, but are formed continuously in design, and can have a substantially cross-shaped outline. Therefore, the input-receiving member 120 according to the fourth modification has a visually superior appearance compared to the input-receiving member 120 shown in FIG.

[0107] (Fifth to Ninth Modifications of Input Receiving Member 120) FIG. 13 is a plan view showing the input receiving member 120 provided in a fifth modification of the electrostatic detection type input device 100 according to an embodiment. FIG. 14 is a plan view showing the input receiving member 120 provided in a sixth modification of the electrostatic detection type input device 100 according to an embodiment. FIG. 15 is a plan view showing the input receiving member 120 provided in a seventh modification of the electrostatic detection type input device 100 according to an embodiment. FIG. 16 is a plan view showing the input receiving member 120 provided in an eighth modification of the electrostatic detection type input device 100 according to an embodiment. FIG. 17 is a plan view showing the input receiving member 120 provided in a ninth modification of the electrostatic detection type input device 100 according to an embodiment.

[0108] As in the input-receiving member 120 according to the fifth modified example shown in FIG. 13, in the input-receiving member 120, each of the four decorative portions 124-1, 124-2, 124-3, and 124-4 may have a triangular shape surrounding the corresponding operation area.

[0109] 14, in the input-receiving member 120, each of the four decorative portions 124-1, 124-2, 124-3, and 124-4 may have a circular shape surrounding the corresponding operation area. In addition, as in the input-receiving member 120 according to the sixth modified example shown in FIG. 14, the input-receiving member 120 may have a fifth decorative portion 124-5 having a circular shape surrounding the central operation area.

[0110] Furthermore, as in the seventh modified example of the input-receiving member 120 shown in Figure 15, in the input-receiving member 120, each of the four decorative portions 124-1, 124-2, 124-3, and 124-4 may have an arrow-shaped line shape surrounding the corresponding operation area.

[0111] 16, the input-receiving member 120 may have eight decorative portions 124-1, 124-2, 124-3, 124-4, 124-5, 124-6, 124-7, and 124-8 provided for the eight operation areas A6, A8, A9, A7, A2, A4, A3, and A1, respectively. In this case, as in the input-receiving member 120 according to the eighth modification shown in FIG. 16, each of the eight decorative portions 124-1, 124-2, 124-3, 124-4, 124-5, 124-6, 124-7, and 124-8 in the input-receiving member 120 may have an arrow-shaped line shape surrounding the corresponding operation area.

[0112] Furthermore, as in the input-receiving member 120 according to the ninth modified example shown in FIG. 17, each of the four decorative portions 124-1, 124-2, 124-3, and 124-4 in the input-receiving member 120 may have an arrow-shaped linear shape with a portion (the portion on the central side of the upper portion 122A (i.e., the portion on the operation area A5 side)) interrupted, surrounding the corresponding operation area on three sides.

[0113] In the above embodiment of the present invention, each of the nine electrode portions E1 to E9 has been described as having a generally rectangular shape when viewed in a plan view from above (positive Z-axis direction). However, each of the nine electrode portions E1 to E9 may also be circular, have a polygonal shape other than a rectangular shape, or have a polygonal shape with chamfered corners.

[0114] Although one embodiment of the present invention has been described in detail above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims.

[0115] This international application claims priority based on Japanese Patent Application No. 2023-174270, filed on October 6, 2023, the entire contents of which are incorporated herein by reference.

[0116] 10 Finger 100 Electrostatic detection type input device 110 Case 110A Upper opening 110B Lower opening 111 Internal space 111A Upper space 111B Lower space 111 Internal space 112 Partition plate 113 Guide groove 112A Lower surface 112B Through hole 120 Input receiving member 120A Touch input surface 121 Base 122 Bank portion 122A Upper stage portion 122B Side portion 123-1, 123-2, 123-3, 123-4, 123-5, 123-6, 123-7, 123-8, 123-9 Design portion 124-1 First decorative portion 124-2 Second decorative portion 126-1, 126-2, 126-3, 126-4 Gap 124-3 Third decorative portion 124-4 Fourth decorative portion 124-5 Fifth decorative portion 124-6 Sixth decorative portion 124-7 Seventh decorative portion 124-8 Eighth decorative portion 129 Insulating member 130 Sensor sheet 131 Connection portion 140 Holder 140A Lower surface 141 Mounting surface 142 Guide rib 143 Pressing portion 150 Panel 160 Board 160A Upper surface 161 Push switch 170 Cover 200 Electrostatic detection type input device 224 Decorative portion 300 Electrostatic detection type input device 324 Decorative portion 400 Electrostatic detection type input device A1 to A9 Operation area E1 to E9 Electrode part

Claims

1. An electrostatic detection input device comprising: an input receiving member having a touch input surface that accepts touch input by an operator; and a sensor sheet that detects the touch input, wherein the sensor sheet has: a first electrode portion that generates a detection signal of the touch input by capacitively coupling with an operating body of the operator; and a second electrode portion that generates a detection signal of the touch input by capacitively coupling with the operating body, wherein the touch input surface has: a first operation area that overlaps with the first electrode portion when viewed in a planar view; a first linear decorative portion having a predetermined width that is made of a conductive material and is provided so as to overlap with the first operation area when viewed in a planar view; a second operation area that overlaps with the second electrode portion when viewed in a planar view; and a second linear decorative portion having a predetermined width that is made of a conductive material and is provided so as to overlap with the second operation area when viewed in a planar view, wherein the first decorative portion and the second decorative portion are not connected to each other and are not electrically connected to other elements.

2. The electrostatic detection input device according to claim 1, characterized in that the sensor sheet has a third electrode portion arranged adjacent to the first electrode portion and the second electrode portion and generating a detection signal of the touch input by capacitively coupling with the operating body.

3. An electrostatic detection type input device as described in claim 1, comprising: a substrate; and a light source provided on the substrate, wherein the first decorative portion and the second decorative portion are formed with partial openings and have openings that allow light emitted from the light source to pass through and illuminate the touch input surface.

4. An electrostatic detection type input device as described in claim 1, characterized in that the input-receiving member has a base parallel to the sensor sheet and a bank portion raised from the base, the bank portion having an upper stage portion formed approximately parallel to the base and spaced above the base, and a side portion having an inclined surface inclined relative to the base, connecting between the upper stage portion and the base, and the first decorative portion and the second decorative portion are provided on the side portion.

5. An electrostatic detection type input device as described in claim 1, characterized in that the input-receiving member has a base parallel to the sensor sheet and a bank portion raised from the base, the bank portion having an upper stage portion formed approximately parallel to the base and spaced above the base, and a side portion having a vertical surface perpendicular to the base and connecting between the upper stage portion and the base, the first decorative portion and the second decorative portion being provided on the side portion.

6. The electrostatic detection input device according to claim 2, characterized in that the first decorative portion and the second decorative portion have an approximately U-shape or an approximately C-shape in a planar view.

7. The electrostatic detection type input device described in claim 6, characterized in that the touch input surface has a third decorative portion and a fourth decorative portion, and in a planar view, a virtual line connecting the first decorative portion, the second decorative portion, the third decorative portion, and the fourth decorative portion forms an outline line of a substantially cross shape.

8. The electrostatic detection input device according to claim 2, wherein the first electrode portion, the second electrode portion and the third electrode portion have a rectangular shape.

9. The electrostatic detection type input device according to claim 8, characterized in that the first electrode portion and the third electrode portion are arranged facing each other with at least one side parallel to each other, and the second electrode portion and the third electrode portion are arranged facing each other with at least one side parallel to each other.

10. The electrostatic detection input device according to claim 1, characterized in that the outer dimensions of the first operation area are larger than the outer dimensions of the first electrode portion.

11. The electrostatic detection input device according to claim 1, characterized in that the first decorative portion is provided in a closed ring shape.

12. The electrostatic detection input device according to claim 1, characterized in that it has a gap between the first decorative portion and the second decorative portion.

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