JP2015069609A - Touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel used for various electronic equipment capable of ensuring a reliable operation at a low cost.SOLUTION: A generally sash-like tail part 11A is formed on a substrate 11 so that plural electrodes 13 extend. By overlapping a generally tongue-like shield part 14 formed on the tail part 11A with the tail part 11A, the tail part 11A and the shield part 14 can be fully formed on the substrate 11. Since the shield part 14 is overlapped with the tail part 11A, the touch panel has a simple structure and can be easily assembled while ensuring reliable operation.

Description

  The present invention relates to a touch panel used mainly for operating various electronic devices.

  In recent years, with the advancement and diversification of various electronic devices such as mobile phones and car navigation systems, a light transmissive touch panel is mounted on the front surface of a display element such as a liquid crystal display element, and the display element on the back side is mounted through this touch panel. There are an increasing number of devices that switch various functions of a device by touching a touch panel with a finger or the like while viewing a display, and there is a demand for a device that is inexpensive and can be reliably operated.

  Such a conventional touch panel will be described with reference to FIGS.

  These drawings are partially enlarged in size for easy understanding of the configuration.

  7 is a cross-sectional view of a conventional touch panel, and FIG. 8 is an exploded perspective view. In FIG. 7, reference numeral 1 denotes a film-like and light-transmitting substrate, and the upper surface is substantially rectangular with light-transmitting properties such as indium tin oxide. A plurality of conductive layers 2 having a shape are arrayed with a predetermined gap.

  Reference numeral 3 denotes an electrode made of silver, carbon or the like, one end of which is connected to the plurality of conductive layers 2 and the other end of the plurality of electrodes 3 is formed to extend to the right end of the outer periphery of the substrate 1.

  Reference numeral 4 denotes a light-transmitting insulating resin insulating layer which is formed so as to cover the entire upper surface of the substrate 1 other than the right end of the electrode 3.

  Furthermore, 5 is a film-like wiring board made of an insulating resin such as polyimide, and a plurality of wiring patterns 6 such as copper foil are arranged on the lower surface, and a shield part such as copper foil is formed in a substantially lattice shape on the upper surface. 7 is provided, and the shield portion 7 is connected to a predetermined wiring pattern 6 on the lower surface by a through hole portion 8 in which a conductive layer such as silver is formed on the inner periphery of the through hole of the wiring substrate 5.

  Reference numerals 9 and 10 are insulating layers made of an insulating resin. The insulating layer 9 covers the entire upper surface of the wiring substrate 5 and the insulating layer 10 covers the entire lower surface of the wiring substrate 5 except for both ends of the wiring pattern 6. Has been.

  Further, the left end of the plurality of wiring patterns 6 on the lower surface of the wiring substrate 5 is attached to the right end of the plurality of electrodes 3 on the upper surface of the substrate 1 by an anisotropic conductive adhesive (not shown) in which conductive particles are dispersed in a synthetic resin. A touch panel is configured by adhesive bonding.

  The touch panel configured in this manner is disposed on the front surface of a display element such as a liquid crystal display element and attached to an electronic device, and the right ends of the plurality of wiring patterns 6 on the wiring board 5 are connected by connectors, soldering, or the like. Electrically connected to an electronic circuit or ground circuit (not shown) of the device.

  In the above configuration, the operation is performed by touching the top surface of the insulating layer 4 with a finger or the like according to the display on the display element on the back of the touch panel in a state where voltages are sequentially applied from the electronic circuit to the plurality of electrodes 3 via the wiring pattern 6. Then, since the electrostatic capacity of the conductive layer 2 at the operated position changes, the electronic circuit detects the operated position, and various functions of the device are switched.

  That is, for example, when a finger or the like is touched on the upper surface of the insulating layer 4 on a desired menu in a state where a plurality of menus or the like are displayed on the display element on the back, a part of the charge is conducted to the finger, When the capacitance of the conductive layer 2 of the touch panel changes, and this is detected by the electronic circuit, a desired menu can be selected.

  Further, a shield portion 7 is provided on the upper surface of the wiring board 5 protruding rightward, and this is connected to a ground circuit via a predetermined wiring pattern 6, thereby causing electromagnetic wave noise from an electronic component such as a microcomputer of the electronic circuit. The operation position is formed to prevent erroneous detection.

  As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

JP 2011-146023 A

  However, in the above-described conventional touch panel, the wiring board 5 in which the shield part 7 and the through-hole part 8 are formed is adhesively connected to the plurality of electrodes 3 of the board 1 with an anisotropic conductive adhesive or the like. Since the electrical connection to the electronic circuit and the ground circuit of the electronic device is performed, there are problems that the number of components is increased and the assembly is time-consuming and expensive.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a touch panel that can be formed with a simple configuration at low cost and can be reliably operated.

  In order to achieve the above object, according to the present invention, a substantially band-like tail portion, in which a plurality of electrodes extend, is formed on a substrate so as to protrude, and a substantially tongue-like shield portion provided on the tail portion is folded on the tail portion. The touch panel is constructed by overlapping, and the tail part and shield part are formed integrally with the substrate, and the shield part is folded on the tail part, so it can be easily assembled with a simple structure, This has the effect of being able to obtain an inexpensive touch panel that can be reliably operated.

  As described above, according to the present invention, it is possible to obtain an advantageous effect that it is possible to realize a touch panel that is inexpensive and can be reliably operated.

Sectional drawing of the touchscreen by one embodiment of this invention Same perspective view Same perspective view Perspective view according to another embodiment Same perspective view Partial plan view Cross-sectional view of a conventional touch panel Exploded perspective view

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  These drawings are partially enlarged in size for easy understanding of the configuration.

(Embodiment)
FIG. 1 is a cross-sectional view of a touch panel according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, and 11 is a film-like light-transmitting substrate such as polyethylene terephthalate, polyethersulfone, and polycarbonate. On the upper surface, a plurality of light-transmitting and substantially rectangular conductive layers 12 such as indium tin oxide and tin oxide are arranged with a predetermined gap by sputtering or the like.

  A substantially band-shaped tail portion 11A protruding outward is provided at the right end of the substrate 11, and the other ends of a plurality of electrodes 13 such as silver and carbon, one end of which is connected to the plurality of conductive layers 12, are connected to the tail. It is formed to extend on the upper surface of the portion 11A.

  Further, the tail portion 11A is provided with a substantially tongue-shaped shield portion 14, and a substantially lattice pattern such as silver or carbon formed on the upper surface is formed on the outer peripheral edge of the substrate 11 with a plurality of conductive layers 12 or It is connected to an electrode 13A formed so as to surround the electrode 13.

  Further, 15 is an insulating layer made of an insulating resin such as epoxy, polyester or acrylic, and this insulating layer 15 is formed so as to cover the entire upper surface of the substrate 11 other than the right end of the electrode 13, and the shield part 14 is bent. The touch panel is configured by being superimposed on the tail portion 11A and pasted on the upper surface of the tail portion 11A with an adhesive (not shown) or the like.

  In order to manufacture such a touch panel, as shown in the perspective view of FIG. 3A, first, an upper surface of a thin film such as indium tin oxide formed on the entire upper surface of the substrate 11 by sputtering or the like, After masking the pattern of the plurality of conductive layers 12 with a coating made of an insulating resin such as a dry film, it is immersed in a predetermined etching solution to dissolve and remove a thin film at an unnecessary portion, and a plurality of conductive layers are formed on the upper surface of the substrate 11. Layer 12 is formed.

  Then, as shown in FIG. 3B, a plurality of electrodes 13 having one end connected to the plurality of conductive layers 12 and the other end extending to the tail portion 11A on the upper surface of the substrate 11 by screen printing or the like, A substantially grid-like pattern of the electrode 13A and the shield part 14 on the outer peripheral edge of the substrate 11 is formed.

  Furthermore, after the insulating layer 15 is formed so as to cover the entire upper surface of the substrate 11 except for the right end of the electrode 13 by printing or the like on the upper surface of the substrate 11, the shield portion 14 is folded over the upper surface of the tail portion 11A and bonded thereto. Thus, the touch panel as shown in FIGS. 1 and 2 is completed.

  That is, since the substantially band-like tail portion 11A and the substantially tongue-shaped shield portion 14 are integrally formed on the substrate 11, a plurality of electrodes 13 and 13A, a substantially lattice pattern of the shield portion 14 and the like are printed. The shield part 14 can be formed at the middle part of the tail part 11A simply by bending and bonding the shield part 14 to the upper surface of the tail part 11A.

  The touch panel configured as described above is disposed on the front surface of a display element such as a liquid crystal display element and attached to an electronic device, and the right ends of the plurality of electrodes 13 and 13A of the tail portion 11A are connected to a connector, solder, or the like. Is electrically connected to an electronic circuit or a ground circuit (not shown) of the device.

  In the above configuration, when a voltage is sequentially applied from the electronic circuit to the plurality of electrodes 13 and operated by touching the upper surface of the insulating layer 15 with a finger or the like according to the display on the display element on the back surface of the touch panel, Since the capacitance of the conductive layer 12 changes, the electronic circuit detects the operated position, and various functions of the device are switched.

  That is, for example, when a finger or the like is touched on the upper surface of the insulating layer 15 on a desired menu in a state where a plurality of menus or the like are displayed on the display element on the back, a part of the electric charge is conducted to the finger, When the capacitance of the conductive layer 12 of the touch panel changes, and an electronic circuit detects this, the desired menu can be selected.

  Further, the shield part 14 is folded over on the upper surface of the tail part 11A protruding to the right, and this is connected to the ground circuit via the electrode 13A, thereby causing electromagnetic wave noise from electronic parts such as a microcomputer of the electronic circuit. It is formed to prevent erroneous detection of the operation position.

  In the present invention, a substantially band-like tail portion 11A from which a plurality of electrodes 13 extend is formed on the substrate 11, and a substantially tongue-like shield portion 14 is provided on the tail portion 11A. Since the touch panel is formed by folding 14 to the tail portion 11A, the touch panel can be easily assembled even with a simple configuration, and can be operated inexpensively and reliably.

  That is, since the substantially belt-like tail portion 11A and the substantially tongue-shaped shield portion 14 are integrally formed on the substrate 11, the component parts can be simply configured by only one substrate 11, and the plurality of electrodes 13 and 13A can be formed. Since a substantially lattice pattern or the like of the shield part 14 can be simultaneously formed by printing or the like, it can be manufactured at low cost without taking time and effort.

  Moreover, since the shield part 14 formed integrally can be bent, and the shield part 14 can be provided on the upper surface of the plurality of electrodes 13 so as to cover them by simply overlapping and attaching to the tail part 11A. The electromagnetic wave noise is prevented, and the operation position can be reliably detected.

  Furthermore, since the electrode 13A connected to the ground circuit is formed on the outer peripheral edge of the substrate 11 so as to surround the plurality of conductive layers 12 and the electrodes 13, static electricity from the outside of the outer periphery of the touch panel can be prevented.

  In the above description, the shield part 14 is folded over the middle part of the tail part 11A and only the upper surfaces of the plurality of electrodes 13 are covered with the shield part 14. However, the perspective views of FIGS. As shown in the figure, by providing a plurality of shield portions 14A and 14B, folding them on the upper and lower surfaces of the tail portion 11A, and covering the upper and lower surfaces of the plurality of electrodes 13 with the shield portions 14A and 14B, It becomes possible to more reliably prevent noise and the like.

  In the above description, the configuration of the touch panel in which a plurality of substantially rectangular conductive layers 12 are arranged with a predetermined gap on the upper surface of the substrate 11 has been described. As shown in the partial plan view of FIG. A plurality of conductive layers 12 </ b> A that are light-transmissive and substantially band-shaped are arranged in the vertical direction on the upper surface of the substrate 11, and the plurality of substantially rectangular conductive portions formed in the gaps between these layers are insulating layers. The plurality of light-transmitting, substantially band-like conductive layers 12B connected by the plurality of connecting portions are spaced apart from the conductive layer 12A by a predetermined gap so as not to be in electrical contact with the conductive layer 12A. The present invention can be carried out even with a configuration in which they are arranged in the right and left directions orthogonal to each other.

  Further, a configuration in which a plurality of electrodes 13 other than the tail portion 11A are formed by forming a thin film such as copper on the upper surface of indium tin oxide or the like, and the electrodes 13 are thinned and spaced apart, or a plurality of conductive layers The present invention can be applied to various configurations such as a configuration in which a silver thin wire or the like is dispersed in a resin such as light transmissive acrylic or a light transmissive conductive resin such as polythiophene or polyaniline. Implementation is possible.

  As described above, according to the present embodiment, the substantially band-like tail portion 11A from which the plurality of electrodes 13 extend is formed on the substrate 11 so as to protrude, and the substantially tongue-shaped shield portion 14 provided on the tail portion 11A is provided. The tail portion 11A and the shield portion 14 are integrally formed on the substrate 11 by being folded on the tail portion 11A, and the shield portion 14 is folded on the tail portion 11A. It is possible to obtain a touch panel that can be easily operated and that can be operated at a low cost.

  The touch panel according to the present invention has an advantageous effect that an inexpensive and capable of reliable operation can be obtained, and is mainly useful for operation of various electronic devices.

11 Substrate 11A Tail part 12, 12A, 12B Conductive layer 13, 13A Electrode 14, 14A, 14B Shield part 15 Insulating layer

Claims (1)

A light-transmitting substrate with a substantially band-shaped tail portion protruding, a plurality of light-transmitting conductive layers arranged on the upper surface of the substrate with a predetermined gap, and one end connected to the conductive layer and the other end A touch panel comprising a plurality of electrodes extending to the tail portion, a substantially tongue-shaped shield portion provided on the tail portion, and the shield portion folded over the tail portion.

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