Electrostatic capacitance type touch panel

Abstract

The present application provides an electrostatic capacitance touch panel configured to be able to detect a touch operation performed by a user. The electrostatic capacitance touch panel includes an electrode film portion, a first external connection member, and a second external connection member. The electrode film portion includes a first transparent electrode and a second transparent electrode for detecting a touch position, respectively. A shape of the electrode film portion in plan view is rectangular. The first external connection member is electrically connected to the first transparent electrode at a first side of the electrode film portion. The second external connection member is electrically connected to the second transparent electrode at a second side of the electrode film portion. According to the present application, an electrostatic capacitance touch panel that is more narrow-framed can be provided.

Description

Technical Field

[0001] This invention relates to electrostatic capacitive touch panels. Background Technology

[0002] Japanese Patent Application Publication No. 2016-58058 (Patent Document 1) discloses a touch panel. This touch panel includes a first electrode film and a second electrode film. In this touch panel, the loopback wiring of the first electrode film is connected to the second electrode film through through-holes. This achieves a narrow bezel design for the touch panel (see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent document 1: Japanese Patent Application Publication No. 2016-58058. Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, according to the technology disclosed in the aforementioned Patent Document 1, there are situations where the requirement for narrow bezels of touch panels may not be met.

[0008] This invention was made to solve such a problem, and its purpose is to provide an electrostatic capacitive touch panel with a narrower bezel.

[0009] Technical means for solving problems

[0010] The electrostatic capacitive touch panel of the present invention is configured to detect touch operations performed by a user. The electrostatic capacitive touch panel includes an electrode film portion, a first external connector, and a second external connector. The electrode film portion includes a first transparent electrode and a second transparent electrode for detecting the touch position. The electrode film portion has a rectangular shape when viewed from above. The first external connector is electrically connected to the first transparent electrode on a first side of the electrode film portion. The second external connector is electrically connected to the second transparent electrode on a second side of the electrode film portion. According to the present invention, an electrostatic capacitive touch panel with a narrower bezel can be provided.

[0011] In this electrostatic capacitive touch panel, a first external connector is electrically connected to a first transparent electrode on a first side of the electrode film, and a second external connector is electrically connected to a second transparent electrode on a second side of the electrode film. Therefore, according to this electrostatic capacitive touch panel, since the wiring of each transparent electrode is not concentrated on one side, the wiring loops do not become complicated, thus making it easier to achieve a narrow bezel.

[0012] In the above-mentioned electrostatic capacitive touch panel, the length of the side of the first external connector that includes the portion connected to the first transparent electrode can be more than 100% of the length of the area on the first side where the first transparent electrode is formed, and the length of the side of the second external connector that includes the portion connected to the second transparent electrode can be more than 100% of the length of the area on the second side where the second transparent electrode is formed.

[0013] According to this electrostatic capacitive touch panel, since it is not necessary to concentrate the wiring of each transparent electrode in a narrow area on each side, the wiring rewinding does not become complicated, thus making it easier to achieve a narrow bezel.

[0014] In the above-mentioned electrostatic capacitive touch panel, one or more notches may be formed on the edge of the first external connector that includes the portion connected to the first transparent electrode, and the first external connector and the electrode film may be heat-sealed together at multiple locations where there are no notches. In the second external connector, one or more notches may be formed on the edge of the portion that includes the portion connected to the second transparent electrode, and the second external connector and the electrode film may be heat-sealed together at multiple locations where there are no notches.

[0015] In this electrostatic capacitive touch panel, the first external connector and the electrode film are heat-sealed at multiple locations without gaps, and the second external connector and the electrode film are also heat-sealed at multiple locations without gaps. Therefore, according to this electrostatic capacitive touch panel, since there are gaps adjacent to the heat-sealed areas, thermal curing of areas that are not directly heat-sealed can be suppressed.

[0016] In the above-mentioned electrostatic capacitive touch panel, wiring may be formed on the first external connector and the second external connector respectively, and the angle formed by the wiring at the bending position is greater than 90°.

[0017] In this electrostatic capacitive touch panel, the angle formed by the wiring at the bend is greater than 90°. Therefore, according to this electrostatic capacitive touch panel, since the bends of the wiring at each external connector are not abrupt, the wiring can be easily formed by laser processing.

[0018] In the above-mentioned electrostatic capacitive touch panel, the electrode film portion may also include a first electrode film having a first transparent electrode and a second electrode film having a second transparent electrode. On the upper surface of the first electrode film, a first external connector is connected to the first transparent electrode, and on the upper surface of the second electrode film, a second external connector is connected to the second transparent electrode. The first electrode film is disposed above the second electrode film, and the area of ​​the second electrode film is larger than the area of ​​the first electrode film.

[0019] Therefore, according to this electrostatic capacitive touch panel, since external connectors can be connected to the exposed portions of each electrode film, the connection durability of each external connector can be improved.

[0020] The electrostatic capacitive touch panel of the present invention can also be configured to detect touch operations performed by a user, comprising: an electrode film portion including a first transparent electrode and a second transparent electrode for detecting touch positions; a first external connector; and a second external connector. The electrode film portion is generally rectangular in shape when viewed from above. The first external connector is electrically connected to the first transparent electrode on a first side of the electrode film portion, and the second external connector is electrically connected to the second transparent electrode on a second side of the electrode film portion. Wiring is formed on the first external connector and the second external connector respectively. The ends of the wiring of the first external connector are configured to gradually widen in width, and these ends are connected to the first transparent electrode in a straight line. The ends of the wiring of the second external connector are also configured to gradually widen in width, and these ends are connected to the second transparent electrode in a straight line. The angle between the side edge of the narrower portion of the wiring and the side edge of the wider end is greater than 90°.

[0021] The effects of the invention

[0022] According to the present invention, it is possible to provide an electrostatic capacitive touch panel with a narrower bezel. Attached Figure Description

[0023] Figure 1 This is a top view of the touch panel.

[0024] Figure 2 This is a schematic diagram showing a cross-section of a portion of the main body of the touch panel.

[0025] Figure 3 It is a planar diagram schematically showing the state of a first electrode film, a second electrode film, and an adhesive layer stacked together.

[0026] Figure 4 yes Figure 1 A magnified view of part P1.

[0027] Figure 5 This is a flowchart illustrating the manufacturing process of a touch panel.

[0028] Figure 6 It is used for explanation Figure 5 A diagram detailing step S100.

[0029] Figure 7 It is used for explanation Figure 5 A diagram detailing step S110.

[0030] Figure 8 It is used for explanation Figure 5 A diagram detailing step S120.

[0031] Figure 9 It is used for explanation Figure 5 A diagram detailing step S130.

[0032] Figure 10 It is used for explanation Figure 5 A diagram detailing step S140. Detailed Implementation

[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, the same or equivalent parts in the drawings will be labeled with the same reference numerals, and their descriptions will not be repeated.

[0034] [1. Structure of the Touch Panel]

[0035] Figure 1 This is a top view of the touch panel 10 in this embodiment. Additionally, Figure 1 The front side of the touch panel 10 is also known as the upper surface side. Figure 1 The depth side of the touch panel 10 is also referred to as the lower surface side of the touch panel 10. The touch panel 10 is an electrostatic capacitive touch panel that can be installed on displays such as LCD (Liquid Crystal Display) or organic EL (Electroluminescence) displays.

[0036] like Figure 1 As shown, the touch panel 10 includes a touch panel body 100, a first external connector 200, and a second external connector 300.

[0037] The touch panel body 100 is configured to output signals corresponding to the user's touch operation. The touch panel body 100 has a rectangular shape when viewed from above, and has a long side and a short side.

[0038] Figure 2 This is a schematic diagram showing a partial cross-section of the touch panel body 100. (See diagram below.) Figure 2 As shown, the touch panel body 100 is constructed by stacking multiple layers. Specifically, the touch panel body 100 includes a cover member 110, a first electrode film 130, a second electrode film 150, and adhesive layers 120 and 140. That is, the touch panel body 100 is manufactured by bonding the cover member 110, the first electrode film 130, and the second electrode film 150 together with adhesive layers 120 and 140.

[0039] For example, the thickness of the cover component 110 is 0.7 mm, and the thickness of the adhesive layer 120 is 0.125 mm. The thickness of the first electrode film 130 is 0.1 mm, and the thickness of the adhesive layer 140 is 0.05 mm. The thickness of the second electrode film 150 is 0.1 mm. However, the thickness of each layer is not limited to these values.

[0040] The cover member 110 is a substrate disposed on the surface of the touch panel body 100 exposed to the user. The cover member 110 is made of glass, for example. The cover member 110 has a rectangular shape when viewed from above.

[0041] A transparent electrode and a base film are sequentially stacked on the first electrode film 130 and the second electrode film 150, respectively, starting from the upper surface of the touch panel 10. The main component of the transparent electrode is, for example, indium tin oxide (ITO). Alternatively, the main component of the transparent electrode may also be, for example, silver or copper. The base film is, for example, made of polyethylene terephthalate (PET) film.

[0042] The first electrode film 130 includes a method for detecting the arrow Y direction (the long side direction of the touch panel body 100). Figure 1 Multiple transparent electrodes are located at the touch position on the touch panel body 100. In the first electrode film 130, multiple transparent electrodes extend in the direction of arrow X (the direction of the short side of the touch panel body 100), and the multiple transparent electrodes are arranged in a manner that is aligned in the direction of arrow Y.

[0043] The second electrode film 150 includes a plurality of transparent electrodes for detecting the touch position in the direction of arrow X. In the second electrode film 150, the plurality of transparent electrodes extend in the direction of arrow Y, and are arranged in a manner that aligns them in the direction of arrow X. Both the first electrode film 130 and the second electrode film 150 have a rectangular shape when viewed from above. Furthermore, the direction in which the touch position is detected in the first electrode film 130 and the direction in which the touch position is detected in the second electrode film 150 are not necessarily perfectly perpendicular, as long as they are different directions.

[0044] Adhesive layers 120 and 140 are, for example, composed of OCA (Optical Clear Adhesive). OCA is a thin-film optical adhesive sheet. The main component of OCA is, for example, an acrylic resin. The shape of adhesive layers 120 and 140 when viewed from above is rectangular.

[0045] Figure 3 This is a schematic planar diagram showing the stacked state of the first electrode film 130, the second electrode film 150, and the adhesive layers 120 and 140. (See diagram below.) Figure 3 As shown, with the first electrode film 130, the second electrode film 150, and the adhesive layers 120 and 140 stacked, a portion of each of the first electrode film 130 and the second electrode film 150 is exposed to the outside. The shape of the stacked body when viewed from above is approximately rectangular.

[0046] exist Figure 3 In the example, the two ends of the second electrode film 150 in the X direction are aligned with the two ends of the first electrode film 130 in the X direction. However, even if at least one end of the second electrode film 150 in the X direction is not aligned with at least one end of the first electrode film 130 in the X direction, the shape of the laminate in top view can still be considered approximately rectangular. That is, as long as the top view shapes of the first electrode film 130 and the second electrode film 150 are each rectangular, the top view shape of the laminate obtained by stacking them is approximately rectangular.

[0047] In the touch panel 10, the area of ​​the second electrode film 150 is larger than the area of ​​the first electrode film 130. The area of ​​the first electrode film 130 is the same as the area of ​​the adhesive layer 140. The area of ​​the first electrode film 130 is larger than the area of ​​the adhesive layer 120. Furthermore, in the touch panel 10, the long side of the second electrode film 150 is longer than the long sides of both the first electrode film 130 and the adhesive layer 140, and the short side of the first electrode film 130 is longer than the short side of the adhesive layer 120.

[0048] The exposed portion of the first electrode film 130 is electrically connected to the first external connector 200, and the exposed portion of the second electrode film 150 is electrically connected to the second external connector 300. The connection between the first electrode film 130 and the first external connector 200 and the connection between the second electrode film 150 and the second external connector 300 are, for example, made via anisotropic conductive film (ACF).

[0049] Refer again Figure 1 The first external connector 200 transmits a signal indicating the touch position to a detection circuit (not shown). The first external connector 200, such as an FFC (Flexible Flat Cable) or FPC (Flexible Printed Circuit), is bent to the lower surface of the touch panel 10 and connected to the detection circuit. The first external connector 200 is electrically connected to the long side of the first electrode film 130. The first external connector 200 includes a substrate 210 and a plurality of wirings 220 formed on the substrate 210.

[0050] The substrate 210 is made of, for example, a polyethylene terephthalate (PET) film. Each wire 220 is a metal wire, formed on the substrate 210, for example, by patterning using laser processing. Each wire 220 is made of, for example, a conductive paste containing carbon and silver. Each wire 220 may also be made of, for example, a copper-containing conductive paste. In this case, to prevent the copper from being exposed, it is preferable to form a protective layer of resin or the like on the necessary portion above the copper. For example, in the first external connector 200, the thickness of the substrate 210 is 50 μm, the thickness of the polyethylene terephthalate (PET) film as the protective layer is 50 μm, and the thickness of the adhesive layer used to connect them is 25 μm. Thus, to prevent the covering member 110 from lifting, it is preferable that the thickness of the adhesive layer 120 is the same as the thickness of the first external connector 200.

[0051] Each wiring 220 is electrically connected to any of the first transparent electrodes 131 formed on the first electrode film 130 by means of heat sealing or the like. That is, each wiring 220 is connected one-to-one with each of the first transparent electrodes 131.

[0052] Multiple notches C1 are formed on the edge of the substrate 210 that connects to the first electrode film 130. The substrate 210 and the first electrode film 130 are joined together by heat sealing at multiple locations where notches C1 are not present. Specifically, the substrate 210 and the first electrode film 130 are joined together by heat sealing in regions T4-T7 respectively. According to the touch panel 10, for example, when region T4 is heat sealed, since notches C1 exist adjacent to region T4, thermal curing in region T5, which is not directly heat sealed, can be suppressed.

[0053] Furthermore, the length of the side of the substrate 210 connected to the first electrode film 130 is 100% or more of the length of the region on the long side of the first electrode film 130 where the transparent electrode is formed. For example, when the transparent electrode is formed only in a portion of the long side of the first electrode film 130 (e.g., the upper half in the direction of arrow Y), the length of the side of the substrate 210 connected to the first electrode film 130 may be less than 100% of the length of the long side of the first electrode film 130. For example, the length of the side of the substrate 210 connected to the first electrode film 130 is 80% or more of the length of the long side of the first electrode film 130, preferably 90% or more, and more preferably 95% or more. Additionally, the length of the side of the substrate 210 connected to the first electrode film 130 is the length from one end to the other in the direction of arrow Y, and includes the length in the direction of arrow Y of the portion where the notch C1 is formed. According to the touch panel 10, it is not necessary to concentrate the wiring of each transparent electrode of the first electrode film 130 in a narrow area in the edge of the substrate 210, and the wiring rewinding will not become complicated, so it is easier to achieve a narrow bezel of the touch panel 10.

[0054] The second external connector 300 transmits a signal indicating the touch position to the detection circuit. The second external connector 300, for example, is an FFC or FPC, bent to the lower surface of the touch panel 10 and connected to the detection circuit. The second external connector 300 is electrically connected to the short side of the second electrode film 150. Thus, in the touch panel 10, the first external connector 200 and the second external connector 300 are connected to different sides of the touch panel body 100, respectively. Therefore, according to the touch panel 10, the wiring of each transparent electrode is not concentrated on only one side of the touch panel body 100, and the wiring loops are not complicated, thus making it easier to achieve a narrow bezel design for the touch panel 10.

[0055] The second external connector 300 includes a substrate 310 and a plurality of wirings 320. The substrate 310 and wirings 320 have the same structure as the substrate 210 and wirings 220, respectively. Alternatively, the substrate 310 and wirings 320 may have different structures from the substrate 210 and wirings 220, respectively.

[0056] Each wiring 320 is electrically connected to any of the second transparent electrodes 151 formed on the second electrode film 150 using heat sealing or the like. That is, each wiring 320 is connected one-to-one with each transparent electrode.

[0057] Multiple notches C1 are formed on the edge of the substrate 310 that connects to the second electrode film 150. The substrate 310 and the second electrode film 150 are joined together by heat sealing at multiple locations where there are no notches C1. Specifically, the substrate 310 and the second electrode film 150 are joined together by heat sealing in regions T1-T3 respectively.

[0058] Furthermore, the length of the side of the substrate 310 connected to the second electrode film 150 is 100% or more of the length of the region on the long side of the second electrode film 150 where the transparent electrode is formed. For example, when the transparent electrode is formed only in a portion of the short side of the second electrode film 150 (e.g., the left half in the direction of arrow X), the length of the side of the substrate 310 connected to the second electrode film 150 may be less than 100% of the length of the short side of the second electrode film 150. For example, the length of the side of the substrate 310 connected to the second electrode film 150 is 80% or more of the length of the short side of the second electrode film 150, preferably 90% or more, and more preferably 95% or more. Additionally, the length of the side of the substrate 310 connected to the second electrode film 150 is the length from one end to the other in the direction of arrow X, and includes the length in the direction of arrow X of the portion where the notch C1 is formed.

[0059] Furthermore, in the touch panel 10, regions T1, T2, T4, T5, and T6 are all the same length. On the other hand, regions T3 and T7 are each shorter than regions T1, T2, T4, T5, and T6. In the touch panel 10, the shorter portions of the heat-sealed area are concentrated in… Figure 1 The upper left area. By concentrating the shorter sections of the heat-sealing area in a specific location, the frequency of head exchange in the heat-sealing device can be reduced, simplifying the manufacturing process.

[0060] Figure 4 yes Figure 1 The enlarged view of part P1 mainly shows the connection state between the wiring 320 of the second external connector 300 and the second transparent electrode 151 of the second electrode film 150. For example... Figure 4 As shown, a plurality of wirings 320 are formed on the second external connector 300. Each wiring 320 consists of a first portion 321 extending at a slight inclination in the X direction and a second portion 322 extending from the end of the first portion 321 in the Y direction. The angle A1 formed by the first portion 321 and the second portion 322 is greater than 90°. Furthermore, the end 323 of the second portion 322 is formed into a trapezoidal shape that is symmetrical from left to right with a gradually widening width. The angle A2 formed by the side edge of this end 323 and the side edge of the second portion 322 is also greater than 90°. In addition, in Figure 4In this design, adjacent first portions 321 appear to be in contact, but in reality, a gap of approximately 30 μm is formed. Furthermore, the size of this gap is not particularly limited.

[0061] The second transparent electrode 151 is connected to the end 323 of the second portion 322. The width of the portion of the second transparent electrode 151 connected to the end 323 is the same as the width of the widened portion of the end 323. The second portion 322 and the second transparent electrode 151 are electrically connected together by heat sealing or the like in the area indicated by reference numeral 170 (nearer to the second transparent electrode 151 than the end 323). In the area indicated by reference numeral 170, the end 323 of the second portion 322 overlaps with the second transparent electrode 151. Furthermore, the second portion 322 and the second transparent electrode 151 are arranged on the same straight line with their axes approximately aligned. According to this touch panel 10, the curvature (angle A1) and width variation (angle A2) of the wiring 320 in the second external connector 300 are not abrupt, so the wiring 320 can be easily formed by laser processing. Furthermore, by forming the end 323 of the second portion 322 into a trapezoidal shape, the contact area with the second transparent electrode 151 in the width direction can be ensured, reducing the risk of poor electrical connection between the second transparent electrode 151 and the second portion 322.

[0062] Furthermore, in the first external connector 200, each wire 220 is formed in the same way as each wire 320 described above, and the first transparent electrode 131 is also constructed in the same way as the second transparent electrode 151. That is, each wire 220 also has angles A1 and A2 larger than 90° as described above, and has trapezoidal ends.

[0063] [2. Touch Panel Manufacturing Process]

[0064] Figure 5 This is a flowchart illustrating the manufacturing process of the touch panel 10. The processes shown in this flowchart are performed using a manufacturing apparatus for the touch panel 10.

[0065] Reference Figure 5 The manufacturing apparatus attaches an adhesive layer to both sides of the first electrode film 130 (step S100).

[0066] Figure 6 It is used for explanation Figure 5 A diagram detailing step S100 is provided. Figure 6 As shown, a first transparent electrode 131 is patterned and formed on the upper surface of the first electrode film 130. The area of ​​the region where the first electrode film 130 is formed is larger than the area of ​​the adhesive layer 120. The area of ​​the first electrode film 130 is the same as the area of ​​the adhesive layer 140. Figure 5In step S100, the manufacturing apparatus attaches an adhesive layer 120 to the upper surface of the first transparent electrode 131 and an adhesive layer 140 to the lower surface of the first transparent electrode 131. Additionally, in this example, two touch panels 10 are manufactured.

[0067] Refer again Figure 5 The manufacturing apparatus performs laser cutting on the laminate formed in step S100 (step S110).

[0068] Figure 7 It is used for explanation Figure 5 A diagram detailing step S110 is provided. Figure 7 As shown, for example, the end of the adhesive layer 120 is aligned with the end of the first electrode film 130 by laser cutting the laminate along lines L1 and L2.

[0069] Refer again Figure 5 The manufacturing apparatus attaches the second electrode film 150 to the lower surface of the laminate after laser cutting in step S110 (step S120).

[0070] Figure 8 It is used for explanation Figure 5 A diagram detailing step S120 is provided. (See attached diagram.) Figure 8 As shown, a second transparent electrode 151 is patterned on the upper surface of the second electrode film 150. The area of ​​the region in the second electrode film 150 where the second transparent electrode 151 is formed is larger than the area of ​​the region in the first electrode film 130 where the first transparent electrode 131 is formed. Figure 5 In step S120, the manufacturing apparatus attaches the second electrode film 150 to the lower surface of the laminate after laser cutting in step S110. In the laminate with the second electrode film 150 attached, a portion of the first transparent electrode 131 and a portion of the second transparent electrode 151 are exposed to the outside.

[0071] Refer again Figure 5 The manufacturing apparatus laser-cuts the laminate manufactured in step S120 to a specified size (step S130).

[0072] Figure 9 It is used for explanation Figure 5 A diagram detailing step S130 is provided. Figure 9 As shown, for example, a laminate of a specified size is manufactured by laser cutting along line L3. In this example, two laminates are manufactured.

[0073] Refer again Figure 5 The manufacturing apparatus connects the first external connector 200 and the second external connector 300 to the laminate after laser cutting in step S130 (step S140).

[0074] Figure 10 It is used for explanation Figure 5 A diagram detailing step S140 is provided. Figure 10 As shown, the first external connector 200 is heat-sealed to the exposed portion of the first electrode film 130 (first transparent electrode 131), and the second external connector 300 is heat-sealed to the exposed portion of the second electrode film 150 (second transparent electrode 151).

[0075] Refer again Figure 5 The manufacturing apparatus attaches the cover member 110 to the upper surface of the laminate manufactured in step S140 (step S150). Thus, the touch panel 10 is completed.

[0076] [3. Characteristics]

[0077] As described above, in the touch panel 10, the first external connector 200 is electrically connected to the first transparent electrode 131 along the long side of the first electrode film 130, and the second external connector 300 is electrically connected to the second transparent electrode 151 along the short side of the second electrode film 150. Therefore, according to the touch panel 10, the wiring of each transparent electrode is not concentrated on one side, and the wiring loops are not complicated, thus making it easier to achieve a narrow bezel.

[0078] Furthermore, the touch panel 10 is an example of the "electrostatic capacitive touch panel" of the present invention. The first transparent electrode 131 is an example of the "first transparent electrode" of the present invention, and the second transparent electrode 151 is an example of the "second transparent electrode" of the present invention. The structure formed by the first electrode film 130 and the second electrode film 150 is an example of the "electrode film portion" of the present invention. The first external connector 200 is an example of the "first external connector" of the present invention, and the second external connector 300 is an example of the "second external connector" of the present invention. The first electrode film 130 is an example of the "first electrode film" of the present invention, and the second electrode film 150 is an example of the "second electrode film" of the present invention.

[0079] [4. Variations]

[0080] The embodiments have been described above. However, the present invention is not limited to the embodiments described above, and various modifications can be made as long as they do not depart from its spirit. The following describes variations.

[0081] <4-1>

[0082] In the touch panel 10 of the above embodiment, a first transparent electrode 131 is formed on a first electrode film 130, and a second transparent electrode 151 is formed on a second electrode film 150. However, the first transparent electrode 131 and the second transparent electrode 151 may not necessarily be formed on different electrode films. For example, the first transparent electrode 131 and the second transparent electrode 151 may also be formed on the same electrode film.

[0083] <4-2>

[0084] Furthermore, in the touch panel 10 of the above embodiment, external connectors (first external connector 200 or second external connector 300) are connected to two sides of the touch panel body 100. However, external connectors may also be connected to three or more sides. For example, when the distance between the touch position and the external connector increases, it becomes more difficult to detect the touch signal. That is, the larger the touch panel 10 is, the more difficult it is to detect the touch signal. Therefore, for example, external connectors are connected to two opposite sides, and each external connector is configured to detect the touch position from each external connector to half of the touch panel area. As a result, the distance between the touch position and the external connector is shortened, thus improving the detection accuracy of the touch signal.

[0085] <4-3>

[0086] Furthermore, in the touch panel 10 of the above embodiment, multiple notches C1 are formed in the first external connector 200 and the second external connector 300, respectively. However, these notches C1 are not necessarily provided. In addition, the connection between the first external connector 200 and the second external connector 300 by heat sealing is not necessarily performed in multiple steps, but can be performed all at once.

[0087] <4-4>

[0088] Furthermore, at the bends of wiring 220 and 320, the angle formed by wiring 220 and 320 is greater than 90°. However, the angle formed by wiring 220 and 320 is not limited to this; for example, it can also be 90° or less than 90°.

[0089] <4-5>

[0090] Furthermore, in the touch panel 10 of the above embodiment, the connection between the first electrode film 130 and the first external connector 200, and the connection between the second electrode film 150 and the second external connector 300, are respectively achieved through anisotropic conductive films (ACF). However, the first electrode film 130 and the first external connector 200 are not necessarily formed as independent entities, nor are the second electrode film 150 and the second external connector 300 necessarily formed as independent entities. For example, the first electrode film 130 and the first external connector 200 may be made of the same substrate film, and the second electrode film 150 and the second external connector 300 may also be made of the same substrate film.

[0091] Explanation of reference numerals in the attached figures

[0092] 10: Touch panel, 100: Touch panel body, 110: Covering component, 120, 140: Adhesive layer, 130: First electrode film, 131: First transparent electrode, 150: Second electrode film, 151: Second transparent electrode, 200: First external connector, 300: Second external connector, 210, 310: Substrate, 220, 320: Wiring, C1: Notch, L1-L3: Line, T1-T7: Area.

Claims

1. An electrostatic capacitive touch panel, configured to detect touch operations performed by a user, characterized in that, include: The electrode film includes a first transparent electrode and a second transparent electrode, which are used to detect the touch position, respectively. First external connector; and Second external connector, The electrode film is roughly rectangular in shape when viewed from above. The first external connector is electrically connected to the first transparent electrode at the first side of the electrode film portion. The second external connector is electrically connected to the second transparent electrode on the second side of the electrode film portion. Wiring is formed in the first external connector and the second external connector, respectively. The wiring of the first external connector is configured such that its width gradually increases, and this end is connected to the first transparent electrode in a straight line. The end of the wiring of the second external connector is configured to gradually widen, and this end is connected to the second transparent electrode in a straight line. The angle between the side edge of the narrower portion of the wiring and the side edge of the gradually widening end is greater than 90°. One or more notches are formed on the edge of the first external connector that includes the portion connected to the first transparent electrode. The first external connector and the electrode film are heat-sealed together at multiple locations where the notch is not present. One or more notches are formed on the edge of the second external connector that includes the portion connected to the second transparent electrode. The second external connector and the electrode film are heat-sealed together at multiple locations where the notch is not present. The length of the side of the first external connector that includes the portion connected to the first transparent electrode is at least 100% of the length of the region on the first side where the first transparent electrode is formed. The length of the side of the second external connector that includes the portion connected to the second transparent electrode is more than 100% of the length of the region on the second side where the second transparent electrode is formed. Wiring is formed in the first external connector and the second external connector, respectively. At the location where the wiring bends, the angle formed by the wiring is greater than 90°.

2. The electrostatic capacitive touch panel as described in claim 1, characterized in that: The electrode film portion includes a first electrode film having the first transparent electrode and a second electrode film having the second transparent electrode. On the upper surface of the first electrode film, the first external connector is connected to the first transparent electrode. On the upper surface of the second electrode film, the second external connector is connected to the second transparent electrode. The first electrode film is disposed above the second electrode film. The area of ​​the second electrode film is larger than the area of ​​the first electrode film.

Images