JP2015060364A - Display device with touch sensor and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device with a touch sensor capable of grasping, at a glance, occurrence degree of Moire caused by overlapping regular patterns existing inside a sensor area and a display area, and to provide a manufacturing method of the display device.SOLUTION: Inside a sensor area, a first conductive part consisting of conductive material and an adjusting mark 60 including a linear pattern group 72 arranged at equal intervals are formed. In plan view, the linear pattern group 72 and a two-dimensional pattern 58 cross each other at any part in an overlapped area 76 where the adjusting mark 60 and a display area are overlapped.

Description

  The present invention comprises a display device that displays a picture in a display area by combining a plurality of pixels arranged according to a two-dimensional pattern, and a touch sensor having a sensor area bonded on the display area. The present invention relates to a sensor-equipped display device and a method for manufacturing the same.

  Recently, electronic devices incorporating touch sensors have become widespread. Many touch sensors are mounted on electronic devices having a small-size screen such as a mobile phone and a PDA (Personal Digital Assistant). In the future, it is expected to be incorporated in an electronic device having a large screen such as a display for a PC (Personal Computer).

  For example, in a projected capacitive touch sensor, an electrode region for detecting an X coordinate and an electrode region for detecting a Y coordinate (hereinafter referred to as a sensor region) are alternately arranged via an insulator. Yes.

  This type of touch sensor is used by being bonded onto a display area in a display device. Therefore, various techniques have been proposed for bonding two members with a simple configuration while ensuring high positional accuracy.

  In Patent Document 1, an alignment mark is proposed in which a line pattern composed of a plurality of lines having different widths and a space pattern composed of a plurality of gaps having different widths are complementarily combined. As a result, when there is no gap between the line pattern and the space pattern, it is clearly indicated that both members are in an ideal positional relationship.

  Patent Document 2 proposes an alignment mark in which a square frame pattern and a dot pattern are complementarily combined. Thereby, when the point pattern exists in the frame, it is clearly indicated that the positional deviation between the two members is within the allowable range.

JP 2009-194334 A (FIG. 1) JP-A-8-335755 (FIGS. 1 to 3)

  By the way, when a regular pattern exists in the sensor area, it is superimposed with a two-dimensional pattern (for example, a black matrix) in the display area, whereby interference fringes (hereinafter referred to as moire) in which the intensity of the superimposed pattern changes locally. ) May occur. In particular, depending on the shape of the pattern, the degree of occurrence of moire may be more susceptible to angular deviation than the positional deviation of both members.

  However, the mark described in Patent Document 1 only shows a two-dimensional target position, and the mark described in Patent Document 2 only indicates an allowable range of deviation from the target position, thereby suppressing the occurrence of moire. However, it was not always suitable for adjusting the angle for the purpose.

  The present invention has been made in order to solve the above-described problems, and can make a glance that can grasp the degree of occurrence of moire caused by the regular pattern overlapping existing inside the sensor area and the display area. It is an object to provide a display device with a sensor and a manufacturing method thereof.

  A display device with a touch sensor according to the present invention includes a display device that displays an image in a display region by combining a plurality of pixels arranged according to a two-dimensional pattern, and a sensor region bonded onto the display region. A device including a touch sensor, wherein a conductive portion made of a conductive material and an adjustment mark including a linear pattern group arranged at equal intervals are formed inside the sensor region, and is a plan view. Thus, the linear pattern group and the two-dimensional pattern intersect at any part in the overlapping region where the adjustment mark and the display region overlap.

  With this configuration, interference occurs between the linear pattern group and the two-dimensional pattern in the overlapping area of the adjustment mark and the display area. Therefore, by checking the interference state in the overlapping area instead of the sensor area (especially the conductive portion), at a glance the degree of occurrence of moire due to the superposition of regular patterns existing in the sensor area. I can grasp.

  Moreover, it is preferable that the said linear pattern group has a shape which expresses higher coherence than the pattern of the said electroconductive part in relation to the said two-dimensional pattern.

  Moreover, it is preferable that the said electroconductive part has a mesh pattern which consists of a metal fine wire. The unit shape constituting this mesh pattern may be a single type or a combination of two or more types of polygons. The unit shapes may be irregular and different shapes, and are preferably polygons determined by Voronoi division.

  Moreover, it is preferable that the line width of the said linear pattern group is thicker than the line width which comprises the said mesh pattern. For example, when the line width ratio is defined as (average line width of linear pattern group) / (average line width of mesh pattern), the lower limit range of the line width ratio is preferably 1.2 times or more, and 1.5 times or more Is more preferable. In addition, the upper limit range of the line width ratio may be any range as long as it exhibits coherence, but may be approximately 100 times or less.

  Moreover, when the unit shape which comprises the said mesh pattern is a rhombus, it is preferable that the line interval of the said linear pattern group is larger than one side of the said rhombus.

  Further, the linear pattern group is preferably parallel to the arrangement direction of the mesh patterns. In this case, no interference occurs between the linear pattern group and the two-dimensional pattern or is minimized while the touch sensor and the display device are arranged in an appropriate positional relationship. That is, the operator can determine that the touch sensor and the display device are suitably bonded when the degree of occurrence of interference fringes in the overlapping region is small.

  The linear pattern group is preferably inclined with respect to the arrangement direction of the mesh patterns. In this case, interference fringes are generated between the linear pattern group and the two-dimensional pattern in a state where the touch sensor and the display device are arranged in an appropriate positional relationship. That is, the operator can determine that the touch sensor and the display device are suitably bonded when the degree of occurrence of interference fringes in the overlapping region is large (particularly when the interference fringe is maximum or maximum).

  Moreover, it is preferable that the said adjustment mark comprises a part of said electroconductive part, or the said adjustment mark may be comprised separately from the said electroconductive part. In addition, by forming a plurality of adjustment marks, the accuracy of adjusting the position and orientation of the touch sensor and the display device is further improved. In particular, when the sensor area is rectangular, it is preferable to form one adjustment mark at each diagonal corner.

  The linear pattern group is preferably parallel to the arrangement direction of the two-dimensional pattern. Alternatively, the linear pattern group is preferably inclined with respect to the arrangement direction of the two-dimensional pattern.

  The touch sensor preferably includes a sensor main body in which the conductive portion is formed on both main surfaces of the base.

  The touch sensor includes a first conductive film in which the conductive portion is formed on one main surface of the first base, and a second conductive layer in which the conductive portion is formed on one main surface of the second base. It is preferable to provide a sensor main body formed by laminating a conductive film.

  A method for manufacturing a display device with a touch sensor according to the present invention includes a display device that displays an image in a display area by combining a plurality of pixels arranged according to a two-dimensional pattern, and a sensor bonded to the display area. A method of manufacturing a device comprising a touch sensor having a region, wherein a step of forming linear pattern groups arranged at equal intervals inside the sensor region, and the sensor region and the above in plan view A moving step of relatively moving the touch sensor and the display device so that the display area overlaps at least a part of the overlapping area; and the linear pattern group formed at any part in the overlapping area; And a bonding step of bonding the touch sensor and the display device based on the overlapping shape of the two-dimensional pattern.

  In the forming step, it is preferable to form a conductive portion made of a conductive material and including the linear pattern group inside the sensor region.

  In the formation step, it is preferable that a conductive portion made of a conductive material and an adjustment mark that is separate from the conductive portion and includes the linear pattern group are formed inside the sensor region.

  According to the display device with a touch sensor according to the present invention, interference occurs between the linear pattern group and the two-dimensional pattern in the overlapping region of the adjustment mark and the display region. Therefore, by confirming the interference state in the overlapping area instead of the sensor area, it is possible to grasp at a glance the degree of occurrence of moire due to the superposition of regular patterns existing in the sensor area.

  According to the method for manufacturing the display device with a touch sensor according to the present invention, the touch sensor and the display device are formed based on the overlapping shape of the linear pattern group and the two-dimensional pattern formed at any part in the overlapping region. Therefore, the angle deviation between the two can be adjusted appropriately, and a display device with a touch sensor in which the generation of moire in the sensor region is suppressed can be manufactured.

It is a disassembled perspective view which shows the structural example of the touch sensor which concerns on this embodiment. It is a schematic sectional drawing of the lamination | stacking electroconductive film shown in FIG. FIG. 3 is a partially omitted plan view of the first conductive film as viewed from above. FIG. 3 is a partially omitted plan view of a state in which a first conductive film and a second conductive film are stacked as viewed from above. FIG. 5A is an enlarged plan view of the display area shown in FIG. FIG. 5B is an enlarged plan view of a display area covered with the mesh pattern shown in FIGS. 3 and 4. FIG. 6A is an enlarged plan view of the adjustment mark. FIG. 6B is an enlarged plan view of a two-dimensional pattern. FIG. 6C is an enlarged plan view of a superimposed pattern in which an adjustment mark and a two-dimensional pattern are overlapped. FIG. 7A is an enlarged front view of the adjustment mark. FIG. 7B is an enlarged plan view of a two-dimensional pattern. FIG. 7C is an enlarged plan view of a superimposed pattern in which an adjustment mark and a two-dimensional pattern are overlapped. It is an enlarged plan view of an overlapping pattern ideally overlapped. It is a schematic perspective view for demonstrating the bonding process included in the manufacturing process of the display apparatus with a touch sensor. It is a flowchart which shows the procedure of a bonding process. FIG. 11A and FIG. 11B are schematic explanatory diagrams showing the degree of occurrence of moire when the inclination angle is θ = θ1. 12A and 12B are schematic explanatory diagrams showing the degree of moire generation when the tilt angle is θ = θ2. FIG. 13A is a graph illustrating an example of a characteristic curve of moire width with respect to an inclination angle. FIG. 13B is a graph illustrating an example of a characteristic curve of moire intensity with respect to an inclination angle. 14A and 14B are enlarged plan views of adjustment marks according to the first modification. 15A and 15B are enlarged plan views of the first electrode portion or the second electrode portion according to the second modification. FIG. 16A is an enlarged plan view of an adjustment mark according to a third modification. FIG. 16B is a graph showing another example of the characteristic curve of the moire intensity with respect to the inclination angle. It is a partially omitted plan view of a touch sensor body according to a fourth modification. It is a partially abbreviated top view which looked at the state which laminated | stacked the 1st conductive film and 2nd conductive film which concern on a 6th modification from the upper side.

  Hereinafter, a preferred embodiment of the display device with a touch sensor according to the present invention will be described in detail with reference to the accompanying drawings in connection with the manufacturing method thereof. In the present specification, “˜” indicating a numerical range is used as a meaning including numerical values described before and after the numerical value as a lower limit value and an upper limit value.

[Overall Configuration of Display Device with Touch Sensor 10]
FIG. 1 is an exploded perspective view showing a configuration example of a display device 10 with a touch sensor according to this embodiment. The display device 10 with a touch sensor basically includes a display device 11 that can display visible information in accordance with an input control signal, and a touch sensor 12 disposed on the display device 11. The touch sensor 12 includes a sensor main body 13 and a control circuit 14 that controls driving of the sensor main body 13.

  The sensor body 13 includes a laminated conductive film 18 formed by laminating a first conductive film 16A and a second conductive film 16B, and a cover layer 20 for protecting the upper surface of the first conductive film 16A. . The sensor body 13 is arranged on the display panel 22 in the display device 11 and covers the display area 24 of the display panel 22.

  The first conductive film 16A includes a first sensor region 26A that senses contact / proximity of a conductor (for example, a user's finger) through the cover layer 20, and a frame-like shape disposed on the outer periphery of the first sensor region 26A. And a first terminal wiring region 28A. Similarly, the second conductive film 16B includes a second sensor region 26B that senses contact / proximity of the conductor through the cover layer 20, and a frame-shaped second terminal wiring disposed on the outer periphery of the second sensor region 26B. Region 28B.

  Here, the first sensor region 26A and the second sensor region 26B have the same shape and are arranged at the same position in plan view. Hereinafter, the overlapped area may be simply referred to as “sensor area 26”.

[Configuration of laminated conductive film 18]
FIG. 2 is a schematic sectional view of the laminated conductive film 18 shown in FIG. FIG. 3 is a partially omitted plan view of the first conductive film 16A as viewed from above.

<Configuration of first conductive film 16A>
As shown in FIG. 2, the first conductive film 16A covers the first transparent base 32A, the first conductive part 30A formed on the surface of the first transparent base 32A, and the first conductive part 30A. The first transparent pressure-sensitive adhesive layer 34A is formed.

  As shown in FIG. 3, a plurality of first electrode portions 36 </ b> A are formed in the first sensor region 26 </ b> A by a transparent conductive layer made of a thin metal wire. Each first electrode portion 36A has a belt-like mesh pattern 40 in which a large number of lattices 38 (diamonds in this example) are combined, and extends in the X direction while extending in the Y direction (a direction orthogonal to the X direction). Are arranged along.

  In the first conductive film 16A configured as described above, the first terminal wiring portion 44a made of metal wiring is electrically connected to one end portion of each first electrode portion 36A via the first connection portion 42a. It is connected. With respect to the first conductive film 16A (FIG. 2), a large number of first electrode portions 36A are arranged in a portion corresponding to the first sensor region 26A, and each first connection portion 42a is disposed in the first terminal wiring region 28A. A plurality of first terminal wiring portions 44a led out from are arranged.

  Returning to FIG. 1, a shielding effect is provided on the outside of the first terminal wiring portion 44a so as to surround the first sensor region 26A from one first ground terminal portion 46a to the other first ground terminal portion 46a. The first ground line 48a is formed.

  The outer shape of the first conductive film 16A has a rectangular shape when viewed from above, and the outer shape of the first sensor region 26A also has a rectangular shape. In the first terminal wiring region 28A, a peripheral portion on one long side of the first conductive film 16A has a plurality of first ground terminal portions 46a in addition to a pair of first ground terminal portions 46a at the center in the longitudinal direction. One terminal portion 50a is arranged and formed in the long side direction (Y direction). A plurality of first connection portions 42a are linearly arranged along one long side (Y direction) of the first sensor region 26A. The first terminal wiring portion 44a led out from each first connection portion 42a is routed toward a substantially central portion on one long side of the first conductive film 16A, and is electrically connected to the corresponding first terminal portion 50a. Connected.

<Configuration of the second conductive film 16B>
Returning to FIG. 2, the second conductive film 16B covers the second transparent base 32B, the second conductive portion 30B formed on the surface of the second transparent base 32B, and the second conductive portion 30B. And the formed second transparent pressure-sensitive adhesive layer 34B.

  In the second sensor region 26B, similarly to the first conductive film 16A (see FIG. 3) described above, a plurality of second electrode portions 36B are formed of a transparent conductive layer composed of fine metal wires. Similar to the first electrode portion 36A (see FIG. 3) described above, the second electrode portion 36B has a strip-shaped mesh pattern 40 in which a large number of lattices 38 are combined, and extends in the Y direction while extending in the X direction. It is arranged.

  The second conductive film 16B configured as described above has, for example, one end of each odd-numbered second electrode portion 36B and the other end of each even-numbered second electrode portion 36B. A second terminal wiring portion 44b made of metal wiring is electrically connected through the two connection portions 42b.

  With respect to the second conductive film 16B, a large number of second electrode portions 36B are arranged in a portion corresponding to the second sensor region 26B, and the second terminal wiring region 28B is led out from each second connection portion 42b. A plurality of second terminal wiring portions 44b are arranged. Further, on the outside of the second terminal wiring portion 44b, a second for the purpose of a shielding effect is provided so as to surround the second sensor region 26B from one second ground terminal portion 46b to the other second ground terminal portion 46b. A ground line 48b is formed.

  The outer shape of the second conductive film 16B has a rectangular shape when viewed from above, and the outer shape of the second sensor region 26B also has a rectangular shape. In the second terminal wiring region 28B, a peripheral portion on one long side of the second conductive film 16B has a plurality of second ground terminal portions 46b in addition to a pair of second ground terminal portions 46b at the center in the longitudinal direction. Two terminal portions 50b are arranged and formed in the long side direction (Y direction). In addition, the plurality of second connection portions 42b (for example, odd-numbered portions) are arranged linearly along one short side of the second sensor region 26B. On the other hand, the plurality of second connection portions 42b (for example, even numbers) are linearly arranged along the other short side of the second sensor region 26B.

  Among the plurality of second electrode portions 36B, for example, odd-numbered second electrode portions 36B are connected to the corresponding odd-numbered second connection portions 42b, and even-numbered second electrode portions 36B are respectively corresponding even-numbered numbers. It is connected to the second second connection part 42b. The second terminal wiring portion 44b derived from the odd-numbered second connection portion 42b and the second terminal wiring portion 44b derived from the even-numbered second connection portion 42b are one long side of the second conductive film 16B. And are electrically connected to the corresponding second terminal portions 50b.

  The first terminal wiring portion 44a may be led out in the same manner as the second terminal wiring portion 44b described above, and the second terminal wiring portion 44b may be led out in the same manner as the first terminal wiring portion 44a.

[Example of application to touch sensor 12]
When the laminated conductive film 18 is used as the touch sensor 12, the cover layer 20 is laminated on the first conductive film 16A, and the first conductive film 16A is led out from a plurality of first electrode portions 36A. The one-terminal wiring portion 44a and the second terminal wiring portion 44b derived from the multiple second electrode portions 36B of the second conductive film 16B are connected to the control circuit 14 (see FIGS. 1 and 2).

  By the way, a self-capacitance method can be preferably employed as a touch position detection method. Here, the “self-capacitance method” is a method of scanning the first conductive film 16A and the second conductive film 16B in order and reading the capacitance change of each first electrode portion 36A (each second electrode portion 36B). It is.

  In the self-capacitance method, the control circuit 14 in FIG. 2 supplies the first pulse signal P1 for detecting the touch position in order to the first terminal wiring portion 44a, and sequentially supplies the second terminal wiring portion 44b to the second terminal wiring portion 44b. A second pulse signal P2 for detecting the touch position is supplied.

  Since the capacitance between the first electrode portion 36A and the second electrode portion 36B facing the touch position and GND (ground) increases when the fingertip contacts or approaches the upper surface of the cover layer 20, the first electrode portion The waveforms of the transmission signals from 36A and the second electrode portion 36B are different from the waveforms of the transmission signals from the other electrode portions. Therefore, the control circuit 14 calculates the touch position based on the transmission signals supplied from the first electrode portion 36A and the second electrode portion 36B.

  Further, the mutual capacitance method can be preferably employed as the touch position detection method. Here, the “mutual capacitance method” is a method of scanning a capacitance change at a two-dimensional position (intersection point) by scanning one of the first conductive film 16A and the second conductive film 16B and sensing the other. It is.

  FIG. 4 is a partially omitted plan view of a state in which the first conductive film 16A and the second conductive film 16B are stacked as viewed from above. A second terminal wiring portion 44b made of a fine metal wire is electrically connected to each one end portion of the second electrode portion 36B via a second connection portion 42b. Further, an electrode film 54 is formed in the second terminal wiring region 28B at a position facing the first terminal wiring part 44a of the first conductive film 16A, and the electrode film 54 and the second ground terminal part 46b are electrically connected. Connect.

  In the mutual capacitance method, the control circuit 14 in FIG. 2 applies the voltage signal S2 for detecting the touch position in order to the second electrode unit 36B, and performs sensing (transmission signal) in order to the first electrode unit 36A. (Detection of S1). By bringing a conductor (fingertip) in contact with or close to the upper surface of the cover layer 20, the stray capacitance of the finger is added in parallel to the parasitic capacitance between the first electrode portion 36A and the second electrode portion 36B facing the touch position. Therefore, the waveform of the transmission signal S1 from the second electrode part 36B is different from the waveform of the transmission signal S1 from the other second electrode part 36B. Accordingly, the control circuit 14 calculates the touch position based on the order of the second electrode part 36B that supplies the voltage signal S2 and the transmission signal S1 from the supplied first electrode part 36A.

  By adopting such a self-capacitance type or mutual capacitance type touch position detection method, it is possible to detect each touch position even if two fingertips are simultaneously in contact with or close to the upper surface of the cover layer 20. Become.

  As prior art documents related to a projection type capacitance detection circuit, US Pat. No. 4,582,955, US Pat. No. 4,686,332, US Pat. No. 4,733,222 Specification, US Pat. No. 5,374,787, US Pat. No. 5,543,588, US Pat. No. 7,030,860, US Patent Application Publication No. 2004/0155871 Etc.

[Visibility of display area 24]
Next, the visibility of the display area 24 in the display device 11 will be described with reference to FIGS. 5A and 5B. Here, it is assumed that the display device 11 includes a liquid crystal panel. The display device 11 is not limited to a liquid crystal panel, and may be a plasma panel, an organic EL (Electro-Luminescence) panel, an inorganic EL panel, or the like.

  FIG. 5A is an enlarged plan view of the display area 24 shown in FIG. The display area 24 includes a plurality of pixels 56 arranged in a matrix. One pixel 56 includes three subpixels (a red subpixel 56r, a green subpixel 56g, and a blue subpixel 56b) arranged in the horizontal direction. One sub-pixel has a rectangular shape that is vertically long in the vertical direction. The arrangement pitch of the pixels 56 in the horizontal direction (horizontal pixel pitch Ph) and the arrangement pitch of the pixels 56 in the vertical direction (vertical pixel pitch Pv) are substantially the same. That is, the shape (unit region R) configured by one pixel 56 and the black matrix 57 (horizontal line 57h and vertical line 57v) surrounding the one pixel 56 is a square.

  In this specification, the arrangement structure of each pixel 56 in the display region 24 is collectively referred to as a two-dimensional pattern 58. In this example, the two-dimensional pattern 58 is specified by the size / positional relationship of three subpixels and the size of the black matrix 57.

  FIG. 5B is an enlarged plan view of the display region 24 covered with the mesh pattern 40 shown in FIGS. 3 and 4. Grid lines (metal thin lines) that divide each grid 38 are inclined by 30 ° to 60 ° with respect to the horizontal arrangement direction (X direction) of the pixels 56. Further, the pitch Ps corresponding to one side of the lattice 38 and the length of the diagonal line of one pixel 56 are substantially the same or close to each other. Thereby, the shift | offset | difference of the arrangement period of the mesh pattern 40 and the arrangement period of the two-dimensional pattern 58 becomes small, and generation | occurrence | production of a moire is suppressed.

[Geometric features of adjustment marks 60 and 62]
Next, the geometric features of the adjustment marks 60 and 62 formed on the touch sensor 12 will be described with reference to FIGS. 6A to 7C.

  As shown in FIGS. 1 and 3, adjustment marks 60 and 62 each having a substantially rectangular shape are formed one by one at two corners of the first sensor region 26A (first conductive film 16A). ing. The adjustment mark 60 and the two-dimensional pattern 58 (FIG. 5A) are arranged in a positional relationship that overlaps at least a part of the region in a state where the first sensor region 26A and the display region 24 overlap. The same applies to the adjustment mark 62 and the two-dimensional pattern 58.

  FIG. 6A is an enlarged plan view of the adjustment mark 60. Here, the X1 direction corresponds to the short side direction of the first sensor region 26A, and the Y1 direction corresponds to the long side direction of the first sensor region 26A.

  The adjustment mark 60 includes a square frame pattern 70 and a linear pattern group 72 arranged in the frame pattern 70. The linear pattern group 72 corresponds to a pattern group in which a plurality of linear patterns 74 extending in the Y1 direction are arranged at equal intervals along the X1 direction. Each linear pattern 74 has the same length as one side of the frame pattern 70.

  FIG. 6B is an enlarged plan view of the two-dimensional pattern 58. Here, the X direction corresponds to the short side direction of the display area 24, and the Y direction corresponds to the long side direction of the display area 24. In order to facilitate understanding of the invention, the display device 11 is illustrated without considering the difference in intensity of light emitted.

  FIG. 6C is an enlarged plan view of a superimposed pattern 78 in which the adjustment mark 60 and the two-dimensional pattern 58 are overlapped. Here, it is assumed that the laminated conductive film 18 is disposed in a state where it is inclined with respect to the display panel 22 by an angle θ (hereinafter also referred to as an inclination angle).

  The adjustment mark 60 and the two-dimensional pattern 58 are overlapped in an overlapping region 76 illustrated by a thick line. The linear pattern group 72 intersects with the two-dimensional pattern 58 in the overlapping region 76, so that a superimposed pattern 78 is formed.

  As described above, the arrangement direction of the linear pattern group 72 (extension direction of each linear pattern 74) is inclined by the inclination angle θ with respect to the arrangement direction of the two-dimensional pattern 58 (extension direction of each vertical line 57v). ing. That is, moire (interference fringes) is generated in the overlapping region 76 by locally changing the strength (power spectrum distribution) of the linear pattern group 72 and the two-dimensional pattern 58.

  FIG. 7A is an enlarged front view of the adjustment mark 62. Here, the X1 direction corresponds to the short side direction of the first sensor region 26A, and the Y1 direction corresponds to the long side direction of the first sensor region 26A.

  The adjustment mark 62 includes a square frame pattern 80 and a linear pattern group 82 arranged in the frame pattern 80. The linear pattern group 82 corresponds to a pattern group in which a plurality of linear patterns 84 extending in the X1 direction are arranged at equal intervals along the Y1 direction. Each linear pattern 84 has the same length as one side of the frame pattern 80.

  FIG. 7B is an enlarged plan view of the two-dimensional pattern 58. Since this drawing is the same as the drawing content shown in FIG. 6B, its description is omitted.

  FIG. 7C is an enlarged plan view of a superimposed pattern 88 in which the adjustment mark 62 and the two-dimensional pattern 58 are overlapped. Here, it is assumed that the laminated conductive film 18 is disposed in a state where it is inclined with respect to the display panel 22 by an inclination angle θ.

  The adjustment mark 62 and the two-dimensional pattern 58 are overlapped in an overlapping region 86 illustrated by a thick line. The linear pattern group 82 intersects with the two-dimensional pattern 58 in the overlapping region 86, so that a superimposed pattern 88 is formed.

  As described above, the arrangement direction of the linear pattern group 82 (extending direction of each linear pattern 84) is inclined by an inclination angle θ with respect to the arrangement direction of the two-dimensional pattern 58 (extending direction of each horizontal line 57h). Yes. That is, moire is generated in the overlapping region 86 by locally changing the strength (power spectrum distribution) of the linear pattern group 82 and the two-dimensional pattern 58.

  By the way, when a regular pattern exists in the sensor region 26, a moiré in which the strength of the superimposed patterns 78 and 88 changes locally by overlapping with the two-dimensional pattern 58 in the display region 24 occurs. In particular, depending on the shape of the pattern, the degree of occurrence of moire may be more susceptible to angular deviation than the positional deviation of the laminated conductive film 18 and the display region 24.

  Therefore, it is possible to easily grasp whether or not the laminated conductive film 18 and the display panel 22 are arranged in the correct orientation by visually checking and evaluating the superimposed patterns 78 and 88 formed in a plan view. In particular, it is more effective if the linear pattern groups 72 and 82 have a shape that exhibits higher coherence than the sensor region 26 in relation to the two-dimensional pattern 58.

  FIG. 8 is an enlarged plan view of the overlapping pattern 90 ideally overlapped. In this example, the position and orientation between the adjustment mark 60 and the two-dimensional pattern 58 coincide with each other. At this time, the positions and orientations of the linear pattern 74 and the horizontal line 57h are the same in the overlapping region 76. As a result, since the strength of the linear pattern group 72 and the black matrix 57 is substantially uniform, moire does not occur in the overlapping region 76.

  Even when the position and orientation between the adjustment mark 62 and the two-dimensional pattern 58 coincide with each other, the superimposed pattern 90 is similarly formed. At this time, the positions and orientations of the linear pattern 84 and the vertical line 57v coincide with each other in the overlapping region 86. As a result, since the strength of the linear pattern group 82 and the black matrix 57 is substantially uniform, moire does not occur in the overlapping region 86.

  In this way, the worker can confirm the quality of the bonding accuracy of the display device 10 with a touch sensor that has already been produced, using the superimposed patterns 78 and 88 as a clue. In this embodiment, the linear pattern groups 72 and 82 are parallel to the arrangement direction of the two-dimensional pattern 58 in an ideal bonding state.

  The linear pattern groups 72 and 82 may be parallel to the arrangement direction of the mesh pattern 40. In this case, no interference occurs between the linear pattern groups 72 and 82 and the two-dimensional pattern 58 or is minimized while the touch sensor 12 and the display device 11 are arranged in an appropriate positional relationship. That is, the operator can determine that the touch sensor 12 and the display device 11 are suitably bonded when the degree of occurrence of interference fringes in the overlapping regions 76 and 86 is small.

[Description of bonding process]
The method for confirming the bonding accuracy described above can also be applied to a step of bonding the laminated conductive film 18 to the display panel 22 of the display device 11 (hereinafter referred to as a bonding step). FIG. 9 is a schematic perspective view for explaining a bonding process included in the manufacturing process of the display device 10 with a touch sensor.

  On the work table 100, a display device 11 that is an object of the bonding process, a computer 102 that supplies a control signal to the display device 11, a cable 104 that can electrically connect the computer 102 and the display device 11, and a display A light source 106 capable of irradiating ultraviolet light toward the panel 22 and an adhesive 108 that is polymerized and cured in response to the ultraviolet light irradiated from the light source 106 are placed. In this example, the worker 110 is trying to attach the laminated conductive film 18 to the display panel 22 while holding the laminated conductive film 18.

  Hereinafter, a bonding process is demonstrated, referring the flowchart of FIG. Here, prior to the bonding step, adjustment marks 60 and 62 that are separate from the first conductive portion 30A and the second conductive portion 30B are formed inside the sensor region 26 of the laminated conductive film 18. pay attention to.

  In step S <b> 1, the worker 110 fixes and arranges the display device 11 that is a target of the bonding process on the work table 100.

  In step S2, the worker 110 applies the adhesive 108 to the display panel 22 of the display device 11 fixed in step S1. Thereby, a transparent adhesive layer (not shown) that is not yet cured is formed at least on the surface of the display region 24.

  In step S3, the worker 110 places the laminated conductive film 18 on the display panel 22 to which the adhesive 108 has been applied in step S2. At the time of this arrangement, the transparent adhesive layer (not shown) is brought into contact with the second transparent substrate 32B facing downward. Here, only the laminated conductive film 18 is moved, but various arrangements can be adopted in which the laminated conductive film 18 and the display device 11 are relatively moved.

  In step S <b> 4, the worker 110 turns on the display device 11 and displays a desired image in the display area 24. More specifically, in response to a predetermined operation by the worker 110, the computer 102 supplies a control signal indicating an image to the display device 11 side. Here, an image with uniform luminance, for example, a color corresponding to the maximum luminance (R = G = B = 255 in the case of 8 bits), a color corresponding to a single color (G = 255 in the case of 8 bits, R = B) = 0) can be used.

  In step S5, the worker 110 performs moire evaluation in the overlapping regions 76 and 86 formed by the arrangement in step S3. In step S6, the worker 110 determines whether or not the degree of occurrence of moire in the superposition patterns 78 and 88 is an OK level based on the evaluation result in step S5. If it is determined that the level is not OK (step S6: NO), the process proceeds to the next step (S7).

  Here, since the plurality of adjustment marks 60 and 62 are formed in the sensor region 26, the adjustment accuracy of the position and orientation of the touch sensor 12 and the display device 11 is further improved. In particular, when the sensor region 26 is rectangular, it is preferable to form the adjustment marks 60 and 62 one by one at the diagonal corners.

  In step S7, the operator 110 finely adjusts the direction of the laminated conductive film 18 arranged in step S3. And it returns to step S5 and repeats step S5-S7 sequentially below. Thereafter, when it is determined that the degree of occurrence of moire is an OK level (step S6: YES), the process proceeds to step S8.

  In step S <b> 8, the worker 110 turns on the light source 106 with the light source 106 facing the laminated conductive film 18 side while maintaining the arrangement of the laminated conductive film 18. The adhesive 108 is polymerized and cured by the ultraviolet light emitted from the light source 106. Thereby, adhesion (bonding) of the laminated conductive film 18 and the display panel 22 is completed.

[Relationship between tilt angle θ and moire characteristics]
Next, the relationship between the inclination angle θ and the moire characteristics will be described with reference to FIGS. 11A to 13B.

  As shown in FIG. 11A, it is assumed that the inclination angle θ of the laminated conductive film 18 with respect to the display panel 22 is θ = θ1 (θ1: a value outside the allowable range). In this case, as shown in FIG. 11B, a relatively strong moire is generated in the superimposed pattern 88. The interval between the portion 120 where the moire is the strongest and the portion 122 where the moire is the weakest is defined as a “moire width”. Then, in the example of FIG. 11B, the moire width W1 is relatively small.

  As shown in FIG. 12A, it is assumed that the inclination angle θ of the laminated conductive film 18 with respect to the display panel 22 is θ = θ2 (θ2: a value within an allowable range). In this case, as shown in FIG. 12B, a relatively weak moire is generated in the superimposed pattern 88. Similarly to FIG. 11B, the interval between the strongest moire 124 and the weakest moire 126 is defined as a “moire width”. Then, in the example of FIG. 12B, the moire width W2 is relatively large.

  FIG. 13A is a graph illustrating an example of a characteristic curve of the moire width W with respect to the inclination angle θ. The horizontal axis of the graph is the inclination angle θ, and the vertical axis of the graph is the moire width W. In the vicinity of θ = 0, moire does not occur, or moire with a very low spatial frequency component (W is a large value) occurs. As understood from this graph, W has a characteristic of monotonously decreasing as | θ | increases.

  Here, a range in which the inclination angle θ satisfies 0 ≦ | θ | ≦ θt (θt is an arbitrary threshold) is set as “OK level”. In this case, it can be determined that “OK level” is satisfied when W ≧ Wt, and “N / A level” is satisfied when W <Wt is satisfied. In this way, by using the correlation between the inclination angle θ and the moire width W and measuring and evaluating the moire width W, the inclination angle θ can be kept within an allowable range.

  FIG. 13B is a graph illustrating an example of a characteristic curve of the moire intensity P with respect to the inclination angle θ. The horizontal axis of the graph is the inclination angle θ, and the vertical axis of the graph is the moire intensity P. Here, the moire intensity P corresponds to a difference in the level of interference intensity, and may be a measured value or a sensory evaluation value.

  In the vicinity of θ = 0, moire does not occur or is slight (P is a small value). As understood from this graph, when θ is in a specific range close to 0, P has a characteristic of increasing monotonously as | θ | increases.

  Here, a range in which the inclination angle θ satisfies 0 ≦ | θ | ≦ θt is set as “OK level”. In this case, “OK level” can be determined when P ≦ Pt is satisfied, and “N / A level” can be determined when P> Pt is satisfied. Thus, the correlation between the tilt angle θ and the moire intensity P may be used, and the same effect as in the case of the moire width W can be obtained.

[Effects of this embodiment]
The display device 10 with a touch sensor according to this embodiment combines a plurality of pixels 56 arranged according to the two-dimensional pattern 58 and displays the image in the display area 24 and is bonded onto the display area 24. The touch sensor 12 having the sensor area 26 is a device.

  Inside the sensor region 26, there are first conductive portions 30A and second conductive portions 30B made of a conductive material, and adjustment marks 60 and 62 including linear pattern groups 72 and 82 arranged at equal intervals. In the plan view, the linear pattern groups 72 and 82 and the two-dimensional pattern 58 intersect at any part in the overlapping regions 76 and 86 where the sensor region 26 and the display region 24 overlap.

  With this configuration, interference occurs between the linear pattern groups 72 and 82 and the two-dimensional pattern 58 in the overlapping regions 76 and 86 of the sensor region 26 and the display region 24. Therefore, a regular pattern existing in the sensor region 26 is confirmed by checking the interference state in the overlapping regions 76 and 86 instead of the sensor region 26 (in particular, the first conductive portion 30A and the second conductive portion 30B). It is possible to grasp at a glance the degree of moiré caused by the overlapping of the images.

[Modification]
Next, first to sixth modifications according to this embodiment will be described with reference to FIGS. 14A to 18. In addition, about the same structure as this embodiment, the same referential mark is attached | subjected and the description is abbreviate | omitted.

<First Modification>
In this embodiment, the adjustment mark 60 is mainly composed of the linear pattern group 72, but is not limited to the form shown in FIG. 6A. 14A and 14B are enlarged plan views of the adjustment marks 130 and 140 according to the first modification.

  As shown in FIG. 14A, the adjustment mark 130 has a rectangular frame pattern 132 and a lattice pattern 134 arranged in the frame pattern 132. The lattice pattern 134 is formed by regularly arranging rhombic lattices. By the way, paying attention to this figure, the adjustment mark 130 includes a linear pattern group 136 surrounded by broken lines. The linear pattern group 136 corresponds to a pattern group in which seven linear patterns 138 are arranged at equal intervals. Moire is generated in the same manner as described above by tilting and superimposing the adjustment marks 130 thus configured on the two-dimensional pattern 58.

  As illustrated in FIG. 14B, the adjustment mark 140 includes a rectangular frame pattern 142 and a lattice pattern 144 arranged in the frame pattern 142. The lattice pattern 144 is formed by regularly arranging regular hexagonal lattices. By the way, paying attention to this figure, the adjustment mark 140 includes a linear pattern group 146 surrounded by broken lines. The linear pattern group 146 corresponds to a pattern group in which four linear patterns 148 are arranged at equal intervals. When the adjustment mark 140 configured in this manner is tilted and overlapped with the two-dimensional pattern 58, moire is generated in the same manner as described above.

  Thus, since the adjustment marks 130 and 140 are configured to include the linear pattern groups 136 and 146 that are arranged at equal intervals, the same operational effects as in this embodiment can be obtained. Further, the adjustment marks 60, 130, etc. may be formed on at least one main surface of the first conductive film 16A and / or on at least one main surface of the second conductive film 16B.

<Second Modification>
In this embodiment, the adjustment marks 60 and 62 are formed at positions that do not overlap with the first electrode portions 36A, respectively, but are not limited to the forms shown in FIGS.

  15A and 15B are enlarged plan views of the first electrode portions 150 and 160 according to the second modification. In addition, although the 1st electrode parts 150 and 160 are illustrated in this figure, it is applicable also to a 2nd electrode part.

  As shown in FIG. 15A, the adjustment mark 152 constitutes a part of the first electrode portion 150 (or conductive portion), and each line width of the linear pattern group is thicker than the line width constituting the mesh pattern 40. It has become. Thus, it becomes easy to express high coherence by making the line width of the linear pattern group thicker than the line width constituting the mesh pattern 40.

  For example, when the line width ratio is defined as (average line width of linear pattern group) / (average line width of mesh pattern), the lower limit range of the line width ratio is preferably 1.2 times or more, and 1.5 times or more Is more preferable. In addition, the upper limit range of the line width ratio may be any range as long as it exhibits coherence, but may be approximately 100 times or less.

  As shown in FIG. 15B, the adjustment mark 162 constitutes a part of the first electrode portion 160 (or conductive portion), and the line spacing of the linear pattern group is larger than one side of the rhombic lattice 38. ing. Thus, when the unit shape which comprises the mesh pattern 40 is a rhombus, it becomes easy to express high coherency by making the line space | interval of a linear pattern group larger than one side of a rhombus.

<Third Modification>
In this embodiment, the linear pattern group 72 and the two-dimensional pattern 58 (horizontal line 57h, vertical line 57v) are in a mutually parallel positional relationship in an ideally overlapping pattern 90, but FIG. 6A and FIG. And it is not restricted to the form shown in FIG.

  FIG. 16A is an enlarged plan view of an adjustment mark 170 according to a third modification. In addition to the frame pattern 70, the adjustment mark 170 has a linear pattern group 172 arranged in the frame pattern 70. The linear pattern group 172 corresponds to a pattern group in which a plurality of linear patterns 174 extending obliquely in the Y1 direction are arranged at equal intervals along the X1 direction.

  That is, even when the adjustment mark 170 and the two-dimensional pattern 58 are ideally overlapped, the linear pattern group 172 is inclined with respect to the arrangement direction of the two-dimensional pattern 58. Thus, since the extending direction of the linear pattern 174 is inclined with respect to the extending direction of the horizontal line 57h, moire is generated in the overlapping region 76 (FIG. 6C).

  FIG. 16B is a graph showing another example of the characteristic curve of the moire intensity P with respect to the inclination angle θ. The horizontal axis of the graph is the inclination angle θ, and the vertical axis of the graph is the moire intensity P. As understood from the graph, the moiré intensity is maximum when θ = 0 and has a characteristic that P decreases monotonously as | θ | increases. That is, when the moiré intensity P becomes maximum (or maximum), the intensity of moiré generated between the first conductive portion 30A and the second conductive portion 30B is minimum (or minimum).

  As described above, the linear pattern group 172 may be inclined with respect to the arrangement direction of the mesh patterns 40. In this case, interference fringes are generated between the linear pattern group 172 and the two-dimensional pattern 58 in a state where the touch sensor 12 and the display device 11 are arranged in an appropriate positional relationship. That is, the operator can determine that the bonding of the touch sensor 12 and the display device 11 is suitable when the degree of occurrence of interference fringes in the overlapping region 76 is large (particularly when the interference fringe is maximum or maximum).

<Fourth Modification>
In this embodiment, the first conductive film 16A in which the first conductive portion 30A is formed and the second conductive film 16B in which the second conductive portion 30B is formed are stacked. Not limited to.

  FIG. 17 is a partially omitted plan view of a sensor main body 180 according to a fourth modification. The sensor main body 180 has a single-layer conductive film 182 instead of the laminated conductive film 18. The single-layer conductive film 182 has a first conductive portion 30A formed on one main surface of the transparent substrate 184 and a second conductive portion 30B formed on the other main surface. As described above, the first conductive portion 30A and the second conductive portion 30B may be formed on both main surfaces of the transparent base 184, respectively.

<Fifth Modification>
In this embodiment, the adjustment marks 60 and 62 are formed at diagonal positions in the sensor region 26, but are not limited to the form of FIG. The number of the adjustment marks 60 may be one or two or more, and the size of the adjustment marks 60 can be variously changed. Moreover, when the adjustment mark 60 exists, the same or different shape and size can be combined as appropriate.

<Sixth Modification>
In this embodiment, at least one adjustment mark 60, 62 is formed in the sensor region 26, but is not limited to the form of FIG.

  FIG. 18 is a partially omitted plan view of a state in which the first conductive film 190A and the second conductive film 190B according to the sixth modification are stacked as viewed from above. No adjustment mark is formed on either the first conductive film 190A or the second conductive film 190B. Instead, the first conductive portion 30A and the second conductive portion 30B serve as adjustment marks.

  The pasting process in this case is performed similarly to this embodiment (refer to Drawing 10 and Drawing 11). Prior to the bonding step, the first conductive portion 30A and the second conductive portion 30B including linear pattern groups arranged at equal intervals are formed inside the sensor region 26 of the laminated conductive film 18. Keep in mind.

[Preferred embodiment of conductive film]
Next, other preferred modes of the first conductive film 16A and the second conductive film 16B will be described.

  The first terminal wiring portion 44a, the second terminal wiring portion 44b, the first terminal portion 50a, the second terminal portion 50b, the first ground line 48a, the second ground line 48b, the first ground terminal portion 46a, and the second ground described above. The metal wiring constituting the terminal portion 46b and the thin metal wire constituting the transparent conductive layer are each made of a single conductive material. The single conductive material is made of a metal made of one of silver, copper, and aluminum, or an alloy containing at least one of them.

  The length of one side of the lattice 38 is preferably 50 to 500 μm, and more preferably 150 to 300 μm. If the length of one side is less than the above lower limit value, the electrostatic capacity at the time of detection decreases, so that the possibility of detection failure increases. On the other hand, if the upper limit is exceeded, the position detection accuracy may be reduced. In addition, when the lattice 38 is in the above range, it is possible to keep the transparency better, and when it is mounted on the display panel 22 of the display device 11, the display can be visually recognized without a sense of incongruity.

  Moreover, the line | wire width of the metal fine wire which comprises 36 A of 1st electrode parts and the 2nd electrode part 36B is 1-9 micrometers. In this case, the line width of the first electrode portion 36A may be the same as or different from the line width of the second electrode portion 36B.

  That is, the line width of the fine metal wire constituting the transparent conductive layer is preferably 1 μm or more and 10 μm or less, and more preferably 2 μm or more and 7 μm or less. When the line width is less than the above lower limit value, the conductivity becomes insufficient, so that when used for the touch sensor 12, the detection sensitivity becomes insufficient. On the other hand, if the above upper limit is exceeded, moire becomes noticeable, and visibility when used for the touch sensor 12 may deteriorate. In addition, by being in the said range, the moire in 1st sensor area | region 26A and 2nd sensor area | region 26B is improved, and visibility becomes especially good.

  The first conductive film 16A and the second conductive film 16B in this embodiment preferably have an aperture ratio of 85% or more, more preferably 90% or more, and 95% from the viewpoint of visible light transmittance. The above is most preferable. The aperture ratio is the ratio of the entire light-transmitting portion excluding the thin metal wires. For example, the aperture ratio of a square lattice having a line width of 6 μm and a fine wire pitch of 240 μm is 95%.

  In the above-described laminated conductive film 18, for example, as shown in FIG. 2, the first conductive portion 30A is formed on the surface of the first transparent substrate 32A, and the second conductive portion 30B is formed on the surface of the second transparent substrate 32B. However, other layers may exist between the first conductive film 16A and the second conductive film 16B, and the first electrode portion 36A and the second electrode portion 36B are in an insulated state. , They may be arranged facing each other.

  In the above-described example, the first conductive film 16A and the second conductive film 16B are applied to the projected capacitive touch sensor 12. However, the surface capacitive method / resistive film method is also used. It can also be applied to touch sensors.

  The first conductive film 16 </ b> A and the second conductive film 16 </ b> B according to this embodiment described above are not limited to the conductive film for the touch sensor of the display device 11, the electromagnetic wave shielding film of the display device 11, and the display device 11. It can also be used as an optical film installed on the display panel 22.

  Next, a typical method for manufacturing the first conductive film 16A will be briefly described. As a method for producing the first conductive film 16A, for example, the first transparent substrate 32A is exposed to a photosensitive material having an emulsion layer containing a photosensitive silver halide salt and subjected to a development process, whereby an exposed portion and an unexposed portion are obtained. The first conductive portion 30A may be formed by forming a metallic silver portion and a light transmissive portion in the exposed portion. In addition, you may make it carry | support a conductive metal to a metal silver part by giving a physical development and / or a plating process to a metal silver part further. The entire layer in which the conductive metal is supported on the metallic silver portion is referred to as a conductive metallic portion.

  Alternatively, a photosensitive layer to be plated is formed on the first transparent substrate 32A using a pretreatment material for plating, and then exposed and developed, and then subjected to a plating treatment, whereby the exposed portion and the unexposed portion are respectively metal parts. Alternatively, the first conductive portion 30A may be formed by forming a light transmissive portion. Further, a conductive metal may be supported on the metal part by further subjecting the metal part to physical development and / or plating treatment.

  The following two forms are mentioned as a more preferable form of the method using a plating pretreatment material. The following more specific contents are disclosed in JP 2003-213437 A, JP 2006-64923 A, JP 2006-58797 A, JP 2006-135271 A, and the like.

(A) On the first transparent substrate 32A, a layer to be plated containing a functional group that interacts with the plating catalyst or its precursor is applied, and then exposed to light and developed, and then subjected to a plating treatment to place the metal portion on the material to be plated. A mode to be formed.

(B) On the first transparent substrate 32A, a base layer containing a polymer and a metal oxide and a layer to be plated containing a functional group that interacts with the plating catalyst or its precursor are laminated in this order. A mode in which the metal part is formed on the material to be plated by plating after development.

  As another method, the photoresist film on the copper foil formed on the first transparent substrate 32A is exposed and developed to form a resist pattern, and the copper foil exposed from the resist pattern is etched, thereby One conductive portion 30A may be formed.

  Alternatively, the first conductive portion 30A may be formed by printing a paste containing metal fine particles on the first transparent substrate 32A and performing metal plating on the paste.

  Alternatively, the first conductive portion 30A may be printed and formed on the first transparent substrate 32A by a screen printing plate or a gravure printing plate. Alternatively, the first conductive portion 30A may be formed on the first transparent substrate 32A by inkjet.

  Here, the configuration of each layer of the first conductive film 16A and the second conductive film 16B will be described in detail below.

<Transparent substrate>
Examples of the first transparent substrate 32A and the second transparent substrate 32B include a plastic film, a plastic plate, and a glass plate. Examples of raw materials for the plastic film and the plastic plate include polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN); triacetyl cellulose (TAC) and the like. As the first transparent substrate 32A and the second transparent substrate 32B, a plastic film or a plastic plate having a melting point of about 290 ° C. or less is preferable, and in particular, PET is preferable from the viewpoints of light transmittance and workability.

<Silver salt emulsion layer>
The silver salt emulsion layer to be a fine metal wire constituting the transparent conductive layer contains additives such as a solvent and a dye in addition to the silver salt and the binder.

  Examples of the silver salt used in this embodiment include inorganic silver salts such as silver halide and organic silver salts such as silver acetate. In this embodiment, it is preferable to use silver halide having excellent characteristics as an optical sensor.

Silver coating amount of silver salt emulsion layer (coating amount of silver salt) is preferably from 1 to 30 g / m ² in terms of silver, more preferably 1 to 25 g / m ^2, more preferably 5 to 20 g / m ² . By setting the amount of coated silver in the above range, a desired surface resistance can be obtained in the case of a conductive film.

  Examples of the binder used in this embodiment include gelatin, polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), starch and other polysaccharides, cellulose and derivatives thereof, polyethylene oxide, polyvinylamine, chitosan, polylysine, and polyacrylic acid. , Polyalginic acid, polyhyaluronic acid, carboxycellulose and the like. These have neutral, anionic, and cationic properties depending on the ionicity of the functional group.

  The content of the binder contained in the silver salt emulsion layer of this embodiment is not particularly limited, and can be appropriately determined as long as dispersibility and adhesion can be exhibited. The binder content in the silver salt emulsion layer is preferably ¼ or more, more preferably ½ or more in terms of the silver / binder volume ratio. The silver / binder volume ratio is preferably 100/1 or less, and more preferably 50/1 or less. The silver / binder volume ratio is more preferably 1/1 to 4/1. Most preferably, it is 1/1 to 3/1. By setting the silver / binder volume ratio in the silver salt emulsion layer within this range, even when the coating silver amount is adjusted, variation in the resistance value can be suppressed, and a conductive film having a uniform surface resistance can be obtained. The silver / binder volume ratio is converted from the amount of silver halide / binder amount (weight ratio) of the raw material to the amount of silver / binder amount (weight ratio), and further the amount of silver / binder amount (weight ratio) is silver amount. / It can obtain | require by converting into binder amount (volume ratio).

(solvent)
The solvent used for forming the silver salt emulsion layer is not particularly limited. For example, water, organic solvents (for example, alcohols such as methanol, ketones such as acetone, amides such as formamide, dimethyl sulfoxide, etc. Sulphoxides such as, esters such as ethyl acetate, ethers, etc.), ionic liquids, and mixed solvents thereof.

(Other additives)
There are no particular restrictions on the various additives used in this embodiment, and known ones can be preferably used.

<Other layer structure>
A protective layer (not shown) may be provided on the silver salt emulsion layer. An undercoat layer, for example, can be provided below the silver salt emulsion layer.

<Conductive film>
The thickness of the first transparent substrate 32A of the first conductive film 16A and the second transparent substrate 32B of the second conductive film 16B is preferably 5 to 350 μm, and more preferably 30 to 150 μm. If it is the range of 5-350 micrometers, the transmittance | permeability of a desired visible light will be obtained and handling will also be easy.

  The thickness of the metallic silver portion provided on the first transparent substrate 32A and the second transparent substrate 32B depends on the coating thickness of the silver salt emulsion layer coating applied on the first transparent substrate 32A and the second transparent substrate 32B. Can be determined as appropriate. The thickness of the metallic silver part can be selected from 0.001 mm to 0.2 mm, but is preferably 30 μm or less, more preferably 20 μm or less, and further preferably 0.01 to 9 μm. And most preferably 0.05 to 5 μm. Moreover, it is preferable that a metal silver part is pattern shape. The metallic silver part may be a single layer or a multilayer structure of two or more layers. When the metallic silver portion is patterned and has a multilayer structure of two or more layers, different color sensitivities can be imparted so as to be sensitive to different wavelengths. Thereby, when the exposure wavelength is changed and exposed, a different pattern can be formed in each layer.

  The thickness of the conductive metal portion is preferable for the application of the touch sensor 12 because the viewing angle of the display panel 22 increases as the thickness of the conductive metal portion decreases. A thin film is also required from the viewpoint of improving the visibility. From such a viewpoint, the thickness of the layer made of the conductive metal carried on the conductive metal part is preferably less than 9 μm, more preferably 0.1 μm or more and less than 5 μm, and more preferably 0.1 μm or more. More preferably, it is less than 3 μm.

  In this embodiment, a metallic silver portion having a desired thickness is formed by controlling the coating thickness of the silver salt emulsion layer described above, and the thickness of the layer made of conductive metal particles is further reduced by physical development and / or plating treatment. Since it can be freely controlled, even a conductive film having a thickness of less than 5 μm, preferably less than 3 μm can be easily formed.

  In the manufacturing method of the first conductive film 16A and the second conductive film 16B, it is not always necessary to perform a process such as plating. This is because the desired surface resistance can be obtained by adjusting the coating silver amount and silver / binder volume ratio of the silver salt emulsion layer. In addition, you may perform a calendar process etc. as needed.

  In addition, this invention can be used in combination with the technique of the publication | presentation gazette and international publication pamphlet which are described in following Table 1 and Table 2 suitably. Notations such as “JP,” “Gazette” and “No. Pamphlet” are omitted.

[Supplement]
Note that the present invention is not limited to the above-described embodiments and modifications, and can of course be freely changed without departing from the gist of the present invention.

  In this embodiment, the electrodes are formed by fine wires made of metal (silver, copper, gold, etc.), but it goes without saying that the present invention can also be applied to a highly light-transmitting conductive material such as indium tin oxide (ITO).

  In this embodiment, the shape of the lattice 38 forming the first electrode portion 36A and the second electrode portion 36B is a rhombus, but is not limited thereto. For example, the shape of the lattice 38 may be a combination of one type or two or more types of polygons (triangle, quadrangle, pentagon, hexagon, etc.). The shape of the lattice 38 may be irregular and different, and is preferably a polygon determined by Voronoi division.

DESCRIPTION OF SYMBOLS 10 ... Display apparatus with a touch sensor 11 ... Display apparatus 12 ... Touch sensor 13, 180 ... Sensor main body 14 ... Control circuit 16A, 190A ... 1st conductive film 16B, 190B ... 2nd conductive film 18 ... Laminated conductive film 24 ... display area 26 ... sensor area 26A ... first sensor area 26B ... second sensor area 28A ... first terminal wiring area 28B ... second terminal wiring area 30A ... first conductive part 30B ... second conductive part 32A ... first transparent Substrate 32B ... second transparent substrate 36A, 150, 160 ... first electrode portion 36B ... second electrode portion 56 ... pixel 57 ... black matrix 58 ... two-dimensional pattern 60, 62, 130, 140, 152, 162, 170 ... adjustment Marks 72, 82, 136, 146, 172 ... Linear pattern groups 76, 86 ... Overlapping region 182 ... Single-layer conductive film 84 ... transparent substrate

Claims (15)

A display device with a touch sensor, comprising: a display device that combines a plurality of pixels arranged according to a two-dimensional pattern to display an image in a display region; and a touch sensor having a sensor region bonded onto the display region. There,
Inside the sensor region, a conductive portion made of a conductive material and an adjustment mark including linear pattern groups arranged at equal intervals are formed,
The display device with a touch sensor, wherein the linear pattern group and the two-dimensional pattern intersect at any part in an overlapping region where the adjustment mark and the display region overlap in plan view. The apparatus of claim 1.
The display device with a touch sensor, wherein the linear pattern group has a shape that exhibits higher coherence than the pattern of the conductive portion in relation to the two-dimensional pattern. The apparatus of claim 2.
The display device with a touch sensor, wherein the conductive portion has a mesh pattern made of fine metal wires. The apparatus of claim 3.
The display device with a touch sensor, wherein a line width of the linear pattern group is larger than a line width constituting the mesh pattern. The apparatus of claim 3.
When the unit shape which comprises the said mesh pattern is a rhombus, the line interval of the said linear pattern group is larger than one side of the said rhombus, The display apparatus with a touch sensor characterized by the above-mentioned. In the apparatus of any one of Claims 3-5,
The display device with a touch sensor, wherein the linear pattern group is parallel to an arrangement direction of the mesh patterns. In the apparatus of any one of Claims 3-5,
The display device with a touch sensor, wherein the linear pattern group is inclined with respect to an arrangement direction of the mesh patterns. In the apparatus of any one of Claims 3-7,
The display device with a touch sensor, wherein the adjustment mark constitutes a part of the conductive portion. The device according to any one of claims 1 to 8,
The display device with a touch sensor, wherein the linear pattern group is parallel to an arrangement direction of the two-dimensional pattern. The device according to any one of claims 1 to 8,
The display device with a touch sensor, wherein the linear pattern group is inclined with respect to an arrangement direction of the two-dimensional pattern. The device according to any one of claims 3 to 10, wherein
The touch sensor includes a sensor main body in which the conductive portion is formed on both main surfaces of a base body. The device according to any one of claims 3 to 10, wherein
The touch sensor includes a first conductive film in which the conductive portion is formed on one main surface of the first base, and a second conductive film in which the conductive portion is formed on one main surface of the second base. A display device with a touch sensor, comprising a sensor main body formed by laminating a film. A display device with a touch sensor, comprising: a display device that combines a plurality of pixels arranged according to a two-dimensional pattern to display an image in a display region; and a touch sensor having a sensor region bonded onto the display region. A manufacturing method comprising:
Forming a linear pattern group arranged at equal intervals inside the sensor region; and
A movement step of relatively moving the touch sensor and the display device so that the sensor region and the display region overlap at least part of the overlapping region in plan view;
A bonding step of bonding the touch sensor and the display device based on an overlapping shape of the linear pattern group and the two-dimensional pattern formed at any part in the overlapping region. A manufacturing method of a display device with a touch sensor, which is characterized. The manufacturing method according to claim 13, wherein
In the forming step, a conductive part made of a conductive material and including the linear pattern group is formed inside the sensor region. The manufacturing method according to claim 13, wherein
In the forming step, a conductive portion made of a conductive material and an adjustment mark that is separate from the conductive portion and includes the linear pattern group are formed inside the sensor region. Manufacturing method of sensor-equipped display device.

Images