JP2009026290A - Touch panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a touch panel which has excellent bending property and high durability and can maintain reliable electrical connection for a long term. <P>SOLUTION: The touch panel has a fixation side substrate 11 and an operation side substrate 12 disposed facing and adhered to each other. The substrates 11 and 12 having conductive films 20 and 21 formed of conductive polymer on their faces, respectively. The touch panel is capable of detecting any contact point, which is a counter pair on the conductive films 20 and 21, as two-dimensional coordinates. The panel has a bendable bending area 16 formed between one end and the other end thereof, and two input operation regions 14 and 15 defined and formed on both sides of the bending area 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes a fixed-side substrate and an operation-side substrate that are arranged opposite to each other so that a gap is formed in an input area inside the frame portion, and the operation-side substrate is pushed in the input area. It is related with the touch panel which can detect arbitrary contact points as a two-dimensional coordinate by this.

  In recent years, the application range of touch panels has expanded, and the number of portable touch devices installed has increased. As a matter of course, a portable information device such as a mobile phone or a small game machine is desired to be lightweight and thin, and a structure that is not damaged by a drop impact is desired. For this reason, instead of the conventional film-glass type touch panel, plastic touch panels such as high durability FFP, FF, and FP have been used.

  On the other hand, many devices such as mobile phones and small game machines adopt a folding structure in order to reduce the overall size. Many conventional folding devices have a structure in which one side that is folded in half is used as a display screen, the other side is used as an operation surface, and key switches and pointing devices are arranged on the operation surface. It was. And when a touch panel is applied to such an apparatus, it was provided only on the display screen which is one side. However, recently, devices having functions as display screens on both sides have appeared, and the demand for such devices has expanded. For this reason, it has been attempted to apply a touch panel to two display screens.

  In order to apply a touch panel to a device whose both surfaces are display screens, two touch panels 70 and 80 are required as shown in FIG. As a result, two sets of flexible circuit bodies 71 and 81 for the touch panel are required, and the structure of the touch panel is complicated. Accordingly, the present applicant has continued to search for a one-screen touch panel that can be folded in two to form a two-screen input operation area.

  Although not directly related to the present invention, an openable cooking order terminal having a plurality of switch sheets is disclosed (Patent Document 1). In this dish ordering terminal, a binding ring is fixed to a substrate, and a plurality of switch sheets are constrained by a binding ring to form a binder type. Each switch sheet is a laminate of five resin sheets. A circuit body having a switch is formed on the switch sheet.

Japanese Patent Laid-Open No. 10-340151

  In a conventional resistive film type touch panel, an ITO film is formed as a conductive film. Since the ITO film is like a thin glass and has a hard and brittle nature, there is a problem that if the ITO film is bent with a small R, the film will crack and the conductivity will be impaired. That is, there is a problem that the ITO film is damaged by stress acting on the ITO film at the bent portion. For example, it has been confirmed that when the film is bent so as to be folded at a corner radius R1.0, the resistance change occurs several times to several tens times (see FIG. 9).

  In view of the above points, an object of the present invention is to provide a touch panel that is excellent in flexibility, has high durability, and can maintain the reliability of electrical connection over a long period of time.

  In order to achieve the above object, the touch panel according to claim 1 includes a fixed-side substrate and an operation-side substrate that are arranged to face each other and are bonded to each other, and is fixed to the opposing surfaces of the fixed-side substrate and the operation-side substrate. A touch panel in which a side conductive film and an operation side conductive film are respectively formed, and an arbitrary contact point between the fixed side conductive film and the operation side conductive film can be detected as a two-dimensional coordinate, A bendable bend is formed between the other end and two input operation areas are defined on both sides of the bend.

  The touch panel according to claim 2 is the touch panel according to claim 1, wherein the fixed-side conductive film and the operation-side conductive film are conductive polymers.

  The touch panel according to claim 3 is the touch panel according to claim 1, wherein the fixed-side conductive film is an ITO film, the operation-side conductive film is a conductive polymer, and the fixed-side conductive film is bent. A portion corresponding to the portion is removed.

  According to a fourth aspect of the present invention, in the touch panel according to the first or second aspect, the fixed-side substrate is made of glass, and is divided into two at a portion corresponding to the bent portion, and the operation-side substrate Is integrally formed of a transparent film.

  The touch panel according to claim 5 is the touch panel according to any one of claims 1 to 4, wherein an insulating layer is formed in the bent portion.

  In the touch panel according to claim 6, in the touch panel according to claim 5, a plurality of dot spacers having a narrower interval than the dot spacers formed in the two input operation areas are formed in the bent portion. It is characterized by.

  The touch panel according to claim 7 is the touch panel according to any one of claims 2 to 6, wherein a color tone correction film for correcting the blue color of the conductive polymer material is formed at least on the operation side substrate. It is characterized by being.

  The touch panel according to claim 8 is the touch panel according to claim 7, wherein the color tone correction film is a hard coat layer containing a yellow pigment as a color tone correction component.

  The touch panel according to claim 9 is the touch panel according to any one of claims 1 to 8, wherein an external circuit body connected to the fixed-side conductive film and the operation-side conductive film at one place is provided. It is electrically connected through a predetermined wiring pattern.

  A touch panel according to claim 10 is applied to a foldable information device having two liquid crystal regions that can be spread in the touch panel according to any one of claims 1 to 9, and the two input operation regions. Is bonded to the two liquid crystal regions.

  A touch panel according to claim 11 is characterized in that, in the touch panel according to any one of claims 1 to 9, the touch panel is bonded to electronic paper that displays an image by application of magnetism or an electric field.

  As described above, according to the first aspect of the present invention, since the bent portion defining the two input operation areas is freely bendable, one end of the touch panel approaches the other end with the bent portion as a fulcrum. Even if it bends repeatedly in the direction or away, stress can be avoided from concentrating on the bent portion, and can be used. Thereby, the touch panel formed integrally can take two states, a closed state or an open state. Therefore, it is excellent in flexibility, has high durability, and can maintain the reliability of electrical connection over a long period of time.

  According to the second aspect of the present invention, the fixed-side conductive film and the operation-side conductive film are changed from the ITO film to the conductive polymer, so that when the touch panel is repeatedly bent with the bent part as a fulcrum, the fixed-side conductive film and the operation-side conductive film act on the bent part. Since the stress to be applied can be alleviated and the conductive film is not damaged, the durability (writing durability) of the touch panel can be significantly improved.

  According to the invention described in claim 3, the ITO film as the fixed-side conductive film is a hard and brittle material. However, by removing the portion corresponding to the bent portion by etching or the like, the touch panel is used with the bent portion as a fulcrum. Can be bent.

  According to the invention described in claim 4, since the bases of the two input operation areas are formed of glass, it is possible to provide a bendable touch panel without impairing the strength (flexibility characteristics) of the touch panel.

  According to the invention of claim 5, since the insulating layer is formed in the bent portion, it is possible to prevent a short circuit at the bent portion when the touch panel is bent.

  According to the invention described in claim 6, since a large number of dot spacers having a narrow interval are formed in the bent portion, the uniformity of the gap between the pair of conductive films facing each other can be maintained.

  According to the seventh aspect of the invention, the blue color of the conductive polymer material is corrected by the color tone correction film, so that color display such as liquid crystal can be faithfully reproduced and the image quality can be improved.

  According to the eighth aspect of the invention, the blue color of the conductive polymer material can be effectively reduced by using the color correction film as a hard coat layer.

  According to the ninth aspect of the invention, since an external circuit body such as an FPC is connected to the touch panel at a single location, the structure of the touch panel can be simplified.

  According to the invention described in claim 10 or 11, since the touch panel can be formed on the two liquid crystal display screens and electronic paper of the folding information device, the operability of information input to the information device is improved. Can be applied and the range of application can be expanded.

  Specific examples of embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of a touch panel according to the present invention.

  As shown in FIG. 1, a resistive touch panel 10 according to this embodiment includes a fixed substrate (film) 11 that is a lower substrate bonded to a liquid crystal screen, and a finger or An operation side substrate (film) 12 that is a substrate pressed by a pen or the like, and an FPC connector 13 that electrically interconnects both the substrates 11 and 12 and the apparatus main body. The touch panel 10 is applied to a foldable information device 50 (FIG. 4) having two liquid crystal screen areas. The touch panel 10 includes two input operation areas 14 and 15 formed on a single sheet, A bending area (bending portion) 16 between the two input operation areas 14 and 15 is provided. Therefore, one input operation area 15 can be bent with the bending area 16 as a fulcrum.

  The touch panel 10 of this embodiment will be described in detail. The two substrates 11 and 12 have substantially the same configuration except that the dot spacer 18 is formed on the fixed substrate 11. Both substrates 11 and 12 are bonded to each other with a gap (opposite spacing) of about 100 μm inside the frame portion. The dot spacers 18 are formed of an epoxy resin or the like, and are provided at a predetermined pitch with a size of φ40 μm and a height of several μm. The pitch of the adjacent dot spacers 18 is wide in the two input operation areas 14 and 15 and is narrow in the bent area 16 between the two input operation areas 14 and 15. For example, the pitch of the dot spacers 18 in the two input operation areas 14 and 15 can be set to 2 mm, and the pitch of the dot spacers 18 in the bent area 16 can be set to 1 mm to 0.5 mm. By forming the pitch of the bent regions 16 in a narrow pitch, the uniformity of the gap between the pair of conductive films (resistive film sheets) 20 and 21 facing each other is maintained when the touch panel 10 is bent. In addition, as shown in FIG. 2, it is possible to prevent the bending region 16 from being short-circuited by the cooperation of the insulating film 22 formed in the bending region 16 and the narrow pitch dot spacer 18.

  Both substrates 11 and 12 are made of biaxially stretched polyethylene terephthalate (PET) having a thickness of 100 to 200 μm, preferably 175 μm, as base materials 45 and 46, respectively. For the base materials 45 and 46, various plastic materials having flexibility other than PET can be applied. For example, polyethersulfone (PES), polyetheretherketone (PEEK), polycarbonate (PC ), Polypropylene (PP), polyamide (PA), and the like can also be applied.

  Conductive polymers as the conductive films 20 and 21 are formed on the opposing surfaces of both the substrates 11 and 12. The conductive polymer of the present embodiment is a polythiophene-based polymer and has very high transparency (light transmittance). The light transmittance on the touch panel is said to be preferable when the transmittance is 80% or more, but when the thickness is about 500 nm, the light transmittance is said to be 90% or more. Note that other polymers can be used as long as the conductive polymer has high transparency. For example, polyacetylene-based, polypyrrole-based, polyphenylenepinylene-based, and the like can also be applied.

  There is no restriction | limiting in particular in a film thickness, According to the objective, it can select suitably, For example, 0.01-10 micrometers is preferable and 0.1-1 micrometer is more preferable. This is because if the thickness is less than 0.01 μm, the resistance of the film may become unstable, and if it exceeds 10 μm, the adhesion to the substrates 45 and 46 may be reduced. Further, if the thickness is less than 0.1 μm, the resistance of the film becomes unstable in a severe moisture resistance test such as 60 ° C./95% RH, and if it exceeds 1 μm, the light transmittance is low, which is not preferable as a touch panel.

  The surface resistivity (value) of the conductive polymer is not particularly limited and can be appropriately selected depending on the purpose. For example, it is required to be 5,000Ω / □ (ohm / square) or less, It is preferably 3,000Ω / □ or less, and more preferably 1,500Ω / □ or less. This is because if the surface resistivity (value) exceeds 5,000 Ω / □, the response at the time of information input may be lowered. The surface resistivity (value) can be measured according to, for example, JIS K6911, ASTM D257, and the like.

  The method for forming the conductive polymer is not particularly limited and can be appropriately selected from known methods. For example, spin coating, roller coating, bar coating, dip coating, gravure coating, Examples include curtain coating, die coating, spray coating, doctor coating, and kneader coating. Even when the printing method is adopted, there is no particular limitation and can be appropriately selected from known methods. For example, screen printing method, spray printing method, ink jet printing method, letterpress printing method, intaglio printing method, planographic printing Law, etc.

  As described above, the touch panel 10 can be bent using the bending region 16 as a fulcrum by using the flexible PET for both the substrates 11 and 12 as the base materials 45 and 46 and the conductive polymer as the conductive films 20 and 21. It becomes like this. In this embodiment, the durability against bending is very high, and even if bending is repeated 10,000 times at a corner radius of R1.0 mm, it is confirmed experimentally that no cracks occur and the change in electrical resistance is very small. (FIG. 9). On the other hand, it has been found that in a conventional touch panel on which a glassy ITO film is formed, the change in electric resistance becomes very large at the initial stage of repetition and cannot withstand bending. Further, the stress concentration when the screen of the touch panel 10 is pressed with a writing instrument is alleviated by the elasticity of the conductive polymer, and the writing durability of the touch panel 10 is enhanced by the elasticity of the conductive polymer itself. . The bending test will be described later.

  As shown in FIG. 3, the frame portions of both the substrates 11 and 12 are non-input areas with respect to the input area of the touch panel 10, and both the substrates 11 and 12 are combined with a pair of opposite sides of each substrate 11 and 12. Each pair of electrodes 24, 25, 26, 27 is provided to form a frame at times. Each pair of electrodes 24-27 can be formed from silver and a polyester resin. Each pair of electrodes 24 to 27 is configured to detect the X coordinate or Y coordinate of the input point input with a finger, a pen, or the like via the FPC connector 13.

  The portions of the substrates 11 and 12 where the pair of electrodes 24 to 27 are not formed are made of epoxy resin insulation patterns 28 and 29, silver and polyester resin, and flexible circuit bodies and electrodes. Can be formed by wiring patterns 30, 31 interconnecting each other, an acrylic resin adhesive, or the like.

  Both substrates 11 and 12 are bonded using a double-sided tape 33 as a bonding material. The double-sided tape 33 (FIG. 1) is formed in a dimension corresponding to the frame portion of each of the substrates 11 and 12. Since this double-sided tape 33 has adhesive layers on both sides of an insulating plastic film, it also serves as insulation for the electrodes 24 to 27 having a frame shape. The thickness of the double-sided tape 33 varies depending on the application, but for example, a thickness of 30 μm can be used.

  The FPC connector 13 shown in FIG. 2 is resin-molded and is crimped and connected to a frame portion around the input operation area 14. The connector 13 includes a housing and a four-pole female terminal (not shown) accommodated in the housing. A signal FPC (Flexible Printed Circuit) 34 is connected to one end of each terminal. A wiring pattern formed on both substrates 11 and 12 is connected to the other end of each terminal.

  FIG. 4 shows a foldable information device 50 having two spreadable liquid crystal regions on which the touch panel 10 of the present embodiment is mounted. The two input operation areas 14 and 15 of the touch panel 10 are bonded to the two liquid crystal areas of the information device 50. By performing the input operation on two screens, it is possible to improve the operability of information input to the information device 50 and to apply to other uses.

Next, a bending test of a film having a conventional ITO film and a film having the organic conductive polymer of the present invention will be described.
FIG. 5 shows a schematic diagram of a test film 60 used in the bending test. The test film 60 has a predetermined thickness and a predetermined length, and a pair of electrodes 62 and 62 for measuring resistance are provided at both ends in the longitudinal direction.

  6A to 6C are cross-sectional views taken along the line AA of the test film 60 in FIG. (A) is the polymer film 60a of the present invention having the organic conductive polymer 20 on the lower surface, (b) is a conventional ITO film 60b having the ITO film 43 on the lower surface, and (c) is the ITO film 43 on the lower surface in the same manner as (b). It is sectional drawing of the conventional improved ITO film 60c which has NO. Each of the test films 60 a to 60 c includes a base 45 made of PET resin, a hard coat layer 42 coated on the upper surface of the PET resin 45, and transparent conductive layers 20 and 43 coated on the lower surface of the PET resin 45. And it has a laminated structure. In (a), the thickness a2 of the PET resin 45 is set to 120 to 200 μm, the thickness a1 of the hard coat layer 42 is set to 3 to 4 μm, and the thickness a3 of the organic conductive polymer 20 is set to 100 to 200 nm. In (b), the thickness b2 of the PET resin 45 is set to 100 to 200 μm, the thickness b1 of the hard coat layer 42 is set to 3 to 4 μm, and the thickness b3 of the ITO film 43 is set to 20 to 50 nm. (C) shows that the PET resin 45 has a sandwich structure. The upper layer PET resin 45 a and the lower layer PET resin 45 b are bonded together with a soft adhesive 44. Thus, durability with respect to the bending of the film 60c is improved by making PET resin 45 into two upper and lower layers. In (c), the thickness c2 of the upper PET resin 45a is 100 to 200 μm, the thickness c3 of the adhesive 44 is several μm, the thickness c4 of the lower PET resin 45b is about 25 μm, and the thickness c1 of the hard coat layer 42 is 3 to 3 μm. The thickness c5 of 4 μm and the ITO film 43 is set to 20 to 50 nm.

  FIG. 7 shows a state in which the test films 60 a to 60 c are repeatedly bent with the tip of the bending test jig 63 as a bending point. In this test, the test films 60a to 60c are bent and stretched with the tip of the jig 63 as a bending point, thereby applying mechanical stress to the test films 60a to 60c, and the resistance between the pair of electrodes 62 and 62 in the bent state. It is what investigated change.

  FIG. 8 shows the relationship between the corner radius R at the tip of the jig 63 and the resistance value measured when the test films 60a to 60c are bent at the corner radius R. The conventional ITO film 60b has extremely poor flexibility, and a resistance change was observed even at a corner radius R8. The improved ITO film 60c did not show a change in resistance at the corner radius R8, but showed a change in resistance at the corner radius R2, and it was found that a crack occurred in the bent portion. On the other hand, it was found that the polymer film 60a did not change in resistance even when the corner radius R1 was bent, and the bent portion flexibly followed the bending and stretching. Such characteristics of the polymer film 60a are extremely advantageous when using a method of applying mechanical stress, such as direct hitting and pen writing, to the film like a touch panel.

  FIG. 9 shows the number of times of bending and the resistance value measured when the test films 60a to 60c are bent when the corner radius at the tip of the jig 63 is R2.0 and the test films 60a to 60c are bent repeatedly. The relationship is shown. The ITO film 60b caused a resistance change by one bending, and a large resistance change by further bending. The improved ITO film 60c showed no change in resistance after one bend, but a change in resistance was seen after 10 bends, and a large change in resistance was seen after 100 bends. On the other hand, it was found that the polymer film 60a did not show any change in resistance after 100 times of bending and showed a slight change in resistance after 10,000 times of bending.

  Thus, the polymer film 60a has the flexibility that the organic conductive polymer film 20 is a characteristic of the polymer material, and is compatible with the PET base material 45 because of the polymer material. It was found that problems such as a decrease in conductivity due to the destruction of the structure rarely occur. On the other hand, in the conventional ITO films 60b and 60c, the ITO film 43 is formed by a method such as vacuum sputtering, and a thin and brittle ceramic film is formed on the PET substrate 45, and the durability by bending is weak. I found out.

  Next, a modified example of the touch panel will be described based on FIGS. In the drawing, the dimension in the thickness direction is enlarged so that the configuration can be easily understood. 10 to 12 show touch panels 40A to 40C having a color tone correction film 41 for correcting the blue color of the conductive polymer as the conductive films 20 and 21. FIG. The color tone correction film 41 is formed such that the hard coat layer 42 formed on the outermost layer of the substrates 11 and 12 contains a yellow pigment. The yellow pigment can be, for example, nickel yellow or azo yellow. The normal hard coat layer 42 is formed with a thickness of several μm in order to improve the surface hardness and scratch resistance of the substrates 11 and 12. In the color tone correction film 41 of the present invention, a color tone correction function is added to the hard coat layer 42.

  FIG. 10 shows a mode in which the color tone correction film 41 is provided on the fixed side substrate 11 and the operation side substrate 12. In each substrate 11, 12, the hard coat layers 41, 42 have an upper and lower two-layer structure, and the lower layer functions as the color tone correction film 41. The upper layer is a normal hard coat layer 42 having no color tone correction function. The color tone correction film 41 reduces the blue color of the touch panel 40A, can reduce the uncomfortable feeling of those who are used to the touch panel having a slightly yellowish color, and can improve the quality of the touch panel 40A.

  FIG. 11 shows a mode in which the color tone correction film 41 is provided only on the operation side substrate 12. On the side of the operation side substrate 12, the hard coat layers 41 and 42 have an upper and lower two-layer structure, the lower layer is a color tone correction film 41, and the upper layer is a normal hard coat layer 42 having no color tone correction function. Is the same as FIG. As described above, it has been confirmed that the color tone correction film 41 is effective even when it is provided only on the operation side substrate 12.

  In FIG. 12, the color tone correction film 41 is provided only on the operation side substrate 12 as in FIG. 11, the conductive film of the fixed side substrate 11 is the ITO film 43, and the conductive film of the operation side substrate 12 is a conductive polymer. A touch panel 40C is shown. In the touch panel 40C, the bent region 16 of the ITO film 43 in the fixed substrate 11 is removed by etching, so that the bent region 16 can be bent as a fulcrum. Also in this modification, the writing durability of the touch panel 40 </ b> C is not impaired by the conductive polymer formed on the operation side substrate 12.

  FIG. 13 shows a touch panel 40D having no color tone correction film. In the touch panel 40 </ b> D, a conductive polymer is formed on the fixed side substrate 11, and an ITO film 43 is formed on the operation side substrate 12. Therefore, the touch panel 40D cannot be bent using the bending region 16 as a fulcrum, unlike the touch panels 10, 40A, 40B, and 40C described above. The advantage of this touch panel 40D is that the ITO film 43 of the fixed-side substrate 11 is changed to a conductive polymer, thereby improving the durability of the touch panel 40D and correcting the blue color of the conductive polymer due to the yellow color of the ITO film 43. Can be done at the same time.

  As described above, according to the touch panel of the present embodiment, the bending region 16 that defines the two input operation regions 14 and 15 is freely bendable, so that one end of the touch panel is used as the other end with the bending region 16 as a fulcrum. To provide a bendable touch panel that can avoid stress concentration in the bending region 16 even when it is repeatedly bent toward or away from a portion, has high durability, and has excellent electrical connection reliability. Is possible.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the main point of this invention, it can deform | transform and implement variously. In the present embodiment, PET 45 and 46 are applied to both the substrates 11 and 12, but for example, soda lime glass having a thickness of 0.7 mm to 1.8 mm can be used as the base material of the stationary substrate 11. In this case, by separating the portion corresponding to the bending region 16 of the substrate into two, the strength can be increased without impairing the flexibility of the touch panel.

It is sectional drawing which shows one Embodiment of the touchscreen which concerns on this invention. It is a top view when the touch panel of FIG. 1 is made flat. (A) is a top view which shows the opposing surface of the operation side board | substrate of a touchscreen, (b) It is a top view which shows the opposing surface of the stationary side board | substrate of a touchscreen. It is a perspective view which shows the portable information device carrying the touch panel shown in FIG. It is a perspective view of the test film used for the endurance test (bending test). It is sectional drawing cut | disconnected along the AA line | wire of FIG. 5, Comprising: (a) is a film which has an organic conductive polymer in a lower surface, (b) is the conventional film which has an ITO film | membrane in a lower surface, (c) is ( It is sectional drawing of the conventional improved film which has an ITO film | membrane on a lower surface like b). It is a perspective view which shows a mode that a test film is repeatedly bent by making the front-end | tip of the jig | tool for an endurance test (bending test) into a bending point. It is a figure which shows the relationship between the corner radius of the jig | tool front-end | tip shown in FIG. 7, and the resistance value measured when a test film was bent by this corner radius. FIG. 8 is a diagram showing the relationship between the number of bendings and the resistance value measured when the test film is bent when the test film is repeatedly bent at a predetermined corner radius at the jig tip shown in FIG. 7. It is sectional drawing which shows the modification of the touchscreen which has a color tone correction film | membrane (hard-coat layer). It is sectional drawing which shows the other modification of the touchscreen which has a color tone correction film | membrane only in the operation side board | substrate. It is sectional drawing which shows the other modification of the touchscreen which has a color tone correction film | membrane only in the operation side board | substrate, and the electrically conductive film of a fixed side board | substrate is an ITO film | membrane. It is sectional drawing which shows the other modification of the touchscreen whose electrically conductive film of the operation side board | substrate is an ITO film | membrane. It is a top view which shows an example of the conventional touch panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Touch panel 11 Fixed side board | substrate 12 Operation side board | substrate 14,15 Input operation area | region 16 Bending area | region 18 Dot spacer 20,21 Conductive film 41 Color tone correction film | membrane

Claims (11)

A fixed-side substrate and an operation-side substrate that are arranged to be opposed to each other are provided, and a fixed-side conductive film and an operation-side conductive film are formed on opposite surfaces of the fixed-side substrate and the operation-side substrate, respectively. A touch panel capable of detecting any contact point between the side conductive film and the operation side conductive film as a two-dimensional coordinate,
A touch panel, wherein a bendable bend is formed between one end and the other end, and two input operation areas are defined on both sides of the bend.   The touch panel according to claim 1, wherein the fixed-side conductive film and the operation-side conductive film are conductive polymers.   The fixed side conductive film is an ITO film, the operation side conductive film is a conductive polymer, and a portion corresponding to the bent portion of the fixed side conductive film is removed. The touch panel described.   The said fixed side board | substrate is glass, it isolate | separates into two by the part corresponded to the said bending part, The said operation side board | substrate is integrally formed with the transparent film, The Claim 2 or 3 characterized by the above-mentioned. Touch panel.   The touch panel according to claim 1, wherein an insulating layer is formed on the bent portion.   The touch panel as set forth in claim 5, wherein a plurality of dot spacers having a smaller interval than the dot spacers formed in the two input operation areas are formed in the bent portion.   The touch panel according to claim 2, wherein a color tone correction film that corrects the blue color of the conductive polymer material is formed on at least the operation side substrate.   The touch panel according to claim 7, wherein the color tone correction film is a hard coat layer containing a yellow pigment as a color tone correction component.   The external circuit body connected to the fixed-side conductive film and the operation-side conductive film at a single location is electrically connected via a predetermined wiring pattern. The touch panel according to item.   10. The foldable information device having two spreadable liquid crystal regions, wherein the two input operation regions are bonded to the two liquid crystal regions. Touch panel as described in 1.   The touch panel according to any one of claims 1 to 9, wherein the touch panel is attached to electronic paper that displays an image by application of magnetism or an electric field.

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