JP6053571B2 - Touch screen, touch panel, and display device including the same - Google Patents

Description

  The present invention relates to a touch screen, a touch panel, and a display device including the same.

  2. Description of the Related Art Conventionally, a touch panel that detects a touch by an indicator such as a finger and specifies the coordinates of the touch position has attracted attention as one of excellent interface means. In this touch panel, various systems such as a resistive film system and a capacitive system have been proposed and commercialized.

  Among these, as a kind of capacitive touch panel, a projected capacitive touch panel disclosed in Patent Document 1 is known. In this projected capacitive touch panel, even if the front side of the touch screen with a built-in touch sensor is covered with a protective plate such as a glass plate with a thickness of several millimeters, it detects touches with the finger on the protective plate. It is possible to do. Since such a touch screen has advantages such as being excellent in robustness, being capable of touch detection even when wearing gloves, and having a long life with no moving parts, various technologies have been proposed. ing.

  For example, a touch screen constituting a touch panel disclosed in Patent Document 1 includes a first series of conductive elements formed of a thin conductive film as a detection wiring (detection electrode) for detecting capacitance, and a first And a second series of conductor elements formed on the series of conductor elements via an insulating film. In addition, there is no electrical contact between the conductor elements, and a plurality of intersections that intersect three-dimensionally are formed. According to the technique disclosed in Patent Document 1, the indicator is detected by detecting a capacitance formed between an indicator such as a finger and a conductor element that is a detection wiring by a detection circuit. The position coordinates of the touched position are specified. Further, the touch position between the conductor elements can be interpolated by the detected capacitance relative value of one or more conductor elements.

  The touch screen constituting the touch panel disclosed in Patent Document 2 includes detection wiring (detection column wiring and detection row wiring), and these wirings are inclined portions inclined at 45 ° in the column / row direction, respectively. Are formed from zigzag pattern metal wiring that is repeated in a zigzag pattern. According to the technique disclosed in Patent Document 2, it is possible to improve the touch detection sensitivity by increasing the wiring density without increasing the parasitic capacitance between the detection wirings.

  The touch screen that constitutes the touch panel disclosed in Patent Document 3 includes a detection column wiring and a detection row wiring formed in a zigzag pattern, as well as the detection column wiring, Wiring is further provided between the detection row wiring.

  According to the techniques disclosed in Patent Document 2 and Patent Document 3 described above, without increasing the inter-wiring capacitance (hereinafter referred to as “matrix wiring capacitance”) formed between the detection column wiring and the detection row wiring. It is possible to increase the wiring density. In addition, the detection wiring arranged in a rectangular shape has an advantage that the coordinate interpolation processing based on the detection result is easier than the detection wiring arranged in a rhombus chain shape, or a straight line of coordinates obtained by the interpolation processing. There is an advantage that the property is high (particularly in an oblique direction).

  Patent Document 4 discloses a detection method generally called a mutual capacitance detection method. Specifically, the key matrix disclosed in Patent Document 4 is composed of an array of a plurality of drive / receiver electrode pairs, and a coupling static associated with a change in the electric field between electrodes caused by contact of a pointer such as a finger with the substrate. A change in capacitance (mutual electrode capacitance) is detected as the amount of charge.

JP 9-51186 A JP 2010-61502 A JP 2010-97536 A Special table 2003-526831 gazette

  Now, depending on the detection method, the inter-wiring capacitance that changes depending on whether or not an indicator such as a finger touches the touch screen may be closely related to the detection sensitivity. For example, according to the mutual capacitance detection method disclosed in Patent Document 4, the detection sensitivity is increased as the change in capacitance between matrix wirings (change in electric field between electrodes) in response to the touch of an indicator such as a finger increases. be able to.

  However, the capacitance (electric field coupling) between the column-direction bundle wiring and the row-direction bundle wiring is, for example, a configuration in which the detection method disclosed in Patent Document 3 is applied to the touch screen disclosed in Patent Document 2. In a large configuration, a change in the electric field between the detection column wiring and the detection row wiring according to the touch of an indicator such as a finger, that is, a change in the matrix wiring capacitance is less likely to occur. Therefore, when the mutual capacitance detection method is applied in such a configuration, there is a problem that the touch detection sensitivity is low.

  Another problem is that the light transmittance changes periodically because there is a difference between the light transmittance of the portion where the detection wiring is present on the touch screen and the light transmittance of the portion where the detection wiring is not present. As a result, there is a problem that display unevenness occurs. In addition, when such a touch screen is mounted on a display device, there is a problem that moire occurs due to interference between the light transmittance periodically changing as described above and the luminance changing periodically.

  Therefore, in the technique disclosed in Patent Document 3, a third series of conductors made of an opaque conductive material is provided in each of a plurality of regions surrounded by the first series of conductor elements and the second series of conductor elements. It is described that display unevenness and moire can be reduced by providing an element.

  However, in the technique disclosed in Patent Document 3, depending on the display device mounted on the touch screen described above, interference between the conductor elements constituting the touch screen and the pixels constituting the display device occurs, so that moire is still visible. There was a problem that.

  Therefore, the present invention has been made in view of the above-described problems, and can suppress the occurrence of display unevenness such as moire and reduce the capacitance between the detection column wiring and the detection row wiring. The purpose is to provide technology.

  The touch screen according to the present invention includes a transparent substrate, a first wiring formed on the transparent substrate and made of an opaque conductive material in which a plurality of rectangular first units are defined, and the transparent substrate on the transparent substrate. A first wiring and a second wiring made of an opaque conductive material in which a plurality of rectangular second units are defined. In plan view, the first and second units are alternately arranged in a column direction and a row direction, and the first wiring includes an annular pattern wiring that borders a predetermined shape for each of the first units, and the first wiring A coupling wiring disposed on each diagonal line of the unit and connected to the pattern wiring, and the second wiring includes an annular pattern wiring bordering a predetermined shape for each of the second units, And a coupling wiring disposed on each diagonal line of the second unit and connected to the pattern wiring. Detecting column wirings are formed by joining the predetermined coupling wires obliquely adjacent to the plurality of first units, and the predetermined coupling wirings obliquely adjacent to the plurality of second units are coupled to each other. Thus, the detection row wiring is formed. The pattern wiring of at least one of the first units is different from the pattern wiring of the other first unit in the size of the predetermined shape, and the pattern wiring of at least one of the second units is the other of the first pattern wiring. The size of the predetermined shape is different from the pattern wiring of 2 units.

  According to the present invention, it is possible to suppress the occurrence of display unevenness such as moire, and to reduce the capacitance between the detection column wiring and the detection row wiring.

3 is a plan view schematically showing the configuration of the touch panel according to Embodiment 1. FIG. 3 is a cross-sectional view schematically showing a wiring structure of the touch screen according to Embodiment 1. FIG. 3 is a plan view schematically showing a wiring structure of the touch screen according to Embodiment 1. FIG. It is an enlarged plan view which shows the wiring structure of a related touch screen. 3 is a plan view showing a configuration of a first wiring (second wiring) according to the first embodiment. FIG. 3 is a plan view showing a wiring structure of the touch screen according to Embodiment 1. FIG. 6 is a plan view showing a configuration of first wiring (second wiring) according to Embodiment 2. FIG. 6 is a plan view showing a configuration of first wiring (second wiring) according to Embodiment 2. FIG. 6 is a plan view showing a configuration of first wiring (second wiring) according to Embodiment 2. FIG. 6 is a plan view showing a configuration of first wiring (second wiring) according to Embodiment 2. FIG. It is a figure for demonstrating the effect of the touch screen which concerns on Embodiment 2. FIG. FIG. 10 is a plan view showing a configuration of first wiring (second wiring) according to the third embodiment. FIG. 10 is a plan view showing a configuration of first wiring (second wiring) according to the fourth embodiment.

<Embodiment 1>
FIG. 1 is a plan view schematically showing the configuration of the touch panel according to Embodiment 1 of the present invention. The reference numerals given to the components described in the first embodiment are also given to the same or similar components as those in the second, third, and fourth embodiments. .

  The touch panel 71 includes a touch screen 1, an FPC (Flexible Printed Circuit) 72, a controller board 73 connected to the touch screen 1 via the FPC 72, a switch circuit 74 and a detection processing circuit mounted on the controller board 73. 75.

  FIG. 2 is a cross-sectional view schematically showing the wiring structure of the touch screen 1. A touch screen 1 shown in FIG. 2 includes a base substrate 11 that is a transparent substrate made of a transparent glass material or a transparent resin, a first wiring 21 made of an opaque conductive material such as Al or Ag, and Al, Ag, or the like. The second wiring 41 made of an opaque conductive material and an insulating film 61 are provided.

  Here, it is assumed that the first wiring 21 is formed on the base substrate 11 and the second wiring 41 is formed on the first wiring 21 via the insulating film 61. However, the present invention is not limited to this, and the second wiring 41 may be formed on the base substrate 11 and the first wiring 21 may be formed on the second wiring 41 via the insulating film 61. .

  The insulating film 61 is formed between the first wiring 21 and the second wiring 41 and is formed on the second wiring 41. By this insulating film 61, the first wiring 21 and the second wiring 41 are insulated from each other and protected.

  The first wiring 21 defines a plurality of rectangular first units 22 which will be described later. The first wirings 21 in some of the first units 22 are electrically coupled to each other so as to extend in the column direction (corresponding to the y direction in FIG. 1) as schematically shown in FIG. The detection column wiring 23 is formed. On the other hand, as will be described later, the first wirings 21 in the remaining first units 22 are not electrically connected to the detection column wirings 23 and form floating wirings 30 that are in a floating state.

  The second wiring 41 defines a plurality of rectangular second units 42 to be described later. When the second wirings 41 in some of the second units 42 are electrically coupled to each other, they extend in the row direction (corresponding to the x direction in FIG. 1) as schematically shown in FIG. The detection row wiring 43 is formed. On the other hand, as will be described later, the second wiring 41 in the remaining second unit 42 is not electrically connected to the detection row wiring 43 and forms a floating wiring 50 in a floating state.

  As shown in FIG. 2, a display panel 81 capable of displaying an image is mounted on the touch screen 1 including the base substrate 11, the first wiring 21, the second wiring 41, and the insulating film 61 described above. Specifically, the touch screen 1 is adhesively fixed to the front side of the display panel 81. The display panel 81 (FIG. 2) and the touch panel 71 (FIG. 1) including the touch screen 1 constitute a display device.

  Returning to FIG. 1, the switch circuit 74 and the detection processing circuit 75 are electrically connected to the touch screen 1 via the FPC 72 and the controller board 73.

  The switch circuit 74 sequentially selects each of the plurality of detection column wirings 23 and each of the plurality of detection row wirings 43. The detection processing circuit 75 detects touch coordinates on the touch screen 1 that indicate a touch position of an indicator such as a finger that has touched the touch screen 1.

  Here, as a method of detecting the touch coordinates of the indicator, a so-called self-capacitance detection method and a so-called mutual capacitance detection method can be considered.

  When the detection processing circuit 75 is a self-capacitance detection type detection processing circuit, the capacitance formed between the detection column wiring 23 selected by the switch circuit 74 and the indicator, and the switch circuit Based on the detection result of the capacitance formed between the detection row wiring 43 selected by 74 and the indicator, the touch coordinate calculation processing of the indicator is performed.

  On the other hand, in the case where the detection processing circuit 75 is a mutual capacitance detection type detection processing circuit, the detection column wiring 23 selected by the switch circuit 74 and the detection line corresponding to the touch of the indicator on the touch screen 1 are detected. Based on the detection result of the mutual capacitance change with the row wiring 43, the touch coordinate calculation processing of the indicator is performed.

  FIG. 3 is a plan view schematically showing the wiring structure of the touch screen 1. As schematically shown in FIG. 3, the plurality of detection column wirings 23 are extended in the column direction (Y direction in FIG. 1) and in the row direction (X direction in FIG. 1). It is arranged. Both ends of the detection column wiring 23 are electrically connected by connection wiring 62. Similarly, the plurality of detection row wirings 43 extend in the row direction and are arranged in the column direction. Then, both ends of the detection row wiring 43 are electrically connected by the connection wiring 62. The lead-out wiring 63 is a wiring that electrically connects the connection wiring 62 and the terminal 64, and the terminal 64 is electrically connected to the FPC 72 described above.

<Related touch screen>
Next, before describing the details of the wiring structure of the touch screen 1 according to the first embodiment, the wiring structure of a touch screen related to the touch screen 1 (hereinafter referred to as “related touch screen”) will be described.

  FIG. 4 is an enlarged plan view showing a wiring structure of the related touch screen.

  Each of the rectangular areas A1 to A4 shown in FIG. 4 corresponds to the rectangular area A shown in FIG. The regions A1 and A2 are alternately arranged in the row direction (x direction) in FIG. 4, and the regions A3 and A4 are alternately arranged in the row direction. Further, the areas A1 and A3 are alternately arranged in the column direction (y direction) in FIG. 4, and the areas A2 and A4 are alternately arranged in the column direction.

  In FIG. 4, the first wiring 21 is indicated by a dotted line, and the second wiring 41 is indicated by a solid line. Further, the rectangular first unit 22 defined by the first wiring 21 and the rectangular second unit 42 defined by the second wiring 41 are indicated by a two-dot chain line. In plan view, the first unit 22 and the second unit 42 are alternately arranged in the column direction (y direction) and the row direction (x direction). Here, the pitch of the first unit 22 and the second unit 42 is the same in any direction.

  FIG. 5 is a plan view showing the configuration of the first wiring 21 in the first unit 22 according to the first embodiment.

  The first wiring 21 includes a pattern wiring 24 and a coupling wiring 25 for each first unit 22. The pattern wiring 24 is an annular wiring that borders a predetermined shape (here, a rhombus shape). In the example shown in FIG. 5, the rhombus-shaped center of the pattern wiring 24 is shown to coincide with the center of the first unit 22. However, the configuration is not limited to this, and the center of the first unit 22 is not limited thereto. The configuration may not match. The coupling wiring 25 is disposed on each diagonal line of the first unit 22 and is connected to the pattern wiring 24. In the example illustrated in FIG. 5, a configuration in which the coupling wiring 25 having a linear shape in plan view is connected to both the outer peripheral portion and the inner peripheral portion of the annular pattern wiring 24 is illustrated.

  The configuration of the second wiring 41 in the second unit 42 is the same as the configuration of the first wiring 21 in the first unit 22. That is, the second wiring 41 includes a pattern wiring 44 and a coupling wiring 45 for each second unit 42. The pattern wiring 44 is an annular wiring that borders a predetermined shape (here, a rhombus shape). The coupling wiring 45 is disposed on each diagonal line of the second unit 42 and is connected to the pattern wiring 44.

<Wiring structure of region A1 and region A4>
Returning to FIG. 4, five first units 22 and four second units 42 are defined in the area A1, and similarly, the five first units 22 and the four second units 42 are defined in the area A4. 2 units 42 are defined.

  The five first units 22 in the area A <b> 1 are arranged in a cross shape, and each coupling wiring 25 in one first unit 22 located at the center of the cross and a coupling in the other first unit 22. With respect to the wiring 25, the coupling wirings 25 adjacent to each other diagonally (in a direction of 45 ° or −45 ° with respect to the y direction) are coupled to each other. The coupling wiring 25 in the region A4 is coupled in the same manner as the coupling wiring 25 in the region A1 described above.

  Then, with respect to the coupling wiring 25 positioned on the + x side and the −y side in the region A1 and the coupling wiring 25 positioned on the −x side and the + y side in the region A4, the coupling wirings 25 that are obliquely adjacent to each other are coupled. ing. Further, regarding the coupling wiring 25 positioned on the + x side and the + y side in the region A1 and the coupling wiring 25 positioned on the −x side and the −y side in the region A4, the coupling wirings 25 adjacent to each other are coupled to each other. ing.

  As described above, the coupling wirings 25 that are obliquely adjacent to each other in the area A1 and the area A4 are coupled to each other, and the coupling wirings 25 that are obliquely adjacent to each other across the boundary between the area A1 and the area A4 are coupled to each other. Thus, the detection column wiring 23 is formed from the first wiring 21 in the region A1 and the region A4.

  On the other hand, the four second units 42 in the region A1 are arranged on a rectangular vertex, and the coupling wiring 45 in one second unit 42 and the coupling wiring 45 in the other second unit 42 , The coupling wirings 45 adjacent to each other diagonally (in the direction of 45 ° or −45 ° with respect to the x direction) are coupled to each other. However, the coupling wiring 45 in the region A1 is not coupled to any of the coupling wirings 45 in the regions A2, A3, and A4, and the floating wiring 50 is formed from the second wiring 41 in the region A1. Similarly, the floating wiring 50 is formed from the second wiring 41 in the region A4.

<Wiring structure of region A2 and region A3>
In the area A2, four first units 22 and five second units 42 are defined. Similarly, in the area A3, four first units 22 and five second units 42 are defined. Has been.

  The four first units 22 in the region A2 are arranged on a rectangular vertex, and regarding the coupling wiring 25 in one first unit 22 and the coupling wiring 25 in the other first unit 22, The coupling wirings 25 adjacent to each other obliquely (in the direction of 45 ° or −45 ° with respect to the y direction) are coupled to each other. However, the coupling wiring 25 in the region A2 is not coupled to any of the coupling wirings 25 in the regions A1, A3, and A4, and the floating wiring 30 is formed from the first wiring 21 in the region A2. Similarly, the floating wiring 30 is formed from the first wiring 21 also in the region A3.

  On the other hand, the five second units 42 in the region A2 are arranged in a cross shape, and each coupling wiring 45 in one second unit 42 located in the center of the cross and the other second unit 42 With respect to the coupled wiring 45, the coupled wirings 45 adjacent to each other diagonally (in the direction of 45 ° or −45 ° with respect to the x direction) are coupled to each other. The coupling wiring 45 in the region A3 is coupled in the same manner as the coupling wiring 45 in the region A2 described above.

  Then, with respect to the coupling wiring 45 positioned on the −x side and the + y side in the region A2 and the coupling wiring 45 positioned on the + x side and the −y side in the region A3, the coupling wirings 45 that are obliquely adjacent to each other are coupled. ing. Further, with respect to the coupling wiring 45 positioned on the + x side and the + y side in the region A2 and the coupling wiring 45 positioned on the −x side and the −y side in the region A3, the coupling wirings 45 that are obliquely adjacent to each other are coupled. ing.

  As described above, the coupling wires 45 diagonally adjacent to each other in the region A2 and the region A3 are coupled to each other, and the coupling wires 45 diagonally adjacent to each other across the boundary between the region A2 and the region A3 are coupled to each other. As a result, in the area A2 and the area A3, the second wiring 41 constitutes the detection row wiring 43.

  According to the related touch screen as described above, the portion where the detection column wiring 23 and the detection row wiring 43 overlap is only one place where the vertices of the regions A1 to A4 overlap in the vicinity of the center of FIG. Therefore, since the capacitance between the detection column wiring 23 and the detection row wiring 43 can be reduced, it is possible to increase the sensitivity of detecting a touch of an indicator or the like.

  On the other hand, in all the first units 22, the size of the rhombus shape of the pattern wiring 24 is the same, and in all the second units 42, the size of the rhombus shape of the pattern wiring 44 is the same. In the related touch screen configured as described above, the first and second wirings 21 and 41 arranged according to relatively simple rules interfere with the pixels of the display panel 81 attached to the touch screen 1. Therefore, there is a problem that moire occurs.

  On the other hand, according to the touch screen 1 which concerns on this Embodiment 1, generation | occurrence | production of a moire can be suppressed. FIG. 6 is an enlarged plan view showing a wiring structure of the touch screen 1 according to the first embodiment.

  As shown in FIG. 6, the pattern wiring 24 of at least one first unit 22 is different from the pattern wiring 24 of the other first unit 22 in the size of a rhombus (predetermined shape). Similarly, the pattern wiring 44 of at least one second unit 42 is different from the pattern wiring 44 of the other second unit 42 in the rhombus shape (predetermined shape). In the example shown in FIG. 6, each of the rhombic shapes of N stages (N is an integer of 2 or more) is irregularly arranged with respect to the pattern wirings 24 and 44. However, the pattern wirings 24 and 44 are not limited to this, and each of the N-shaped rhombus shapes may be arranged according to complicated rules.

  According to the touch screen 1, the touch panel 71, and the display device according to the first embodiment as described above, the configuration (wiring pattern) of the first wiring 21 and the second wiring 41 may be complicated and thus irregular. it can. Therefore, the occurrence of display unevenness such as moire can be suppressed, and a touch screen with high display performance can be obtained. Further, since the capacitance between the detection column wiring 23 and the detection row wiring 43 can be reduced as in the related touch screen, the sensitivity of detecting a touch of an indicator or the like can be increased.

<Embodiment 2>
In the first embodiment, the pattern wirings 24 and 44 and the coupling wirings 25 and 45 form a diagonal cross-shaped wiring structure inclined by 45 ° with respect to the row direction (x direction) and the column direction (y direction). . When the touch screen 1 configured in this way is illuminated by spot-like external light such as the sun or a light bulb, the spot image reflected to the user (image viewer of the display device) passes through the cross filter. As in the case of the above, it seems that the tail is drawn in the extending direction of the diagonal cross line. Therefore, the user can feel some discomfort such as local glare. Therefore, the second embodiment of the present invention can also solve this problem.

  7 to 10 are plan views showing the configuration of the first wiring 21 in the first unit 22 according to the second embodiment. The configuration of the second wiring 41 in the second unit 42 is also the same. The first wiring 21 according to the second embodiment is assumed to have at least one of the configurations shown in FIGS. Similarly, it is assumed that the second wiring 41 also has at least one configuration shown in FIGS.

  In the configuration shown in FIGS. 7 to 10, a circular shape is applied as the shape of the annular pattern wirings 24 and 44 instead of the diamond shape. As in the first embodiment, the pattern wiring 24 of at least one first unit 22 has a circular shape different from the pattern wiring 24 of the other first unit 22, and is at least one second unit. The pattern wiring 44 of 42 differs from the pattern wiring 44 of the other second unit 42 in the size of the circular shape.

  In addition, in the configurations shown in FIGS. 7 and 8 among the configurations shown in FIGS. 7 to 10, an arc shape (a wavy line shape) is applied instead of a linear shape as the shape of the coupling wirings 25 and 45 in plan view. Has been. The arc shape (FIG. 7) of the coupling wiring 25 in the first unit 22 has a different curvature from the arc shape (FIG. 8) of the coupling wiring 25 in the other first unit 22, and the coupling wiring in the second unit 42. The arc shape of FIG. 45 (FIG. 7) is different in curvature from the arc shape (FIG. 8) of the coupling wiring 45 in the other second unit 42.

  On the other hand, in the configuration shown in FIGS. 9 and 10 among the configurations shown in FIGS. 7 to 10, the first wiring 21 has an outer wiring 26 and an inner wiring 27 instead of the coupling wiring 25. ing. The outer wiring 26 is connected to the outer peripheral portion of the annular pattern wiring 24 and is disposed on each diagonal line of the first unit 22. The inner wiring 27 is connected to the inner peripheral portion of the annular pattern wiring 24 and is different in the extending direction from the outer wiring 26. Similarly, the second wiring 41 has an outer wiring 46 similar to the outer wiring 26 and an inner wiring 47 similar to the inner wiring 27 instead of the coupling wiring 45. The configuration shown in FIG. 9 and the configuration shown in FIG. 10 are different in the extending direction of the inner wirings 27 and 47.

  9 and FIG. 10, in other words, in the configuration shown in FIGS. 7 and 8, the circle of the coupling wirings 25 and 45 with respect to the center of the circular shape of the pattern wirings 24 and 44. It is the structure which rotated the part in a shape. The configuration shown in FIG. 9 and the configuration shown in FIG. 10 have different rotation angles.

  FIG. 11 is a diagram for explaining the effect of the touch screen 1 according to the second embodiment. FIG. 11A is a diagram showing a light transmittance distribution of a display device equipped with the related touch screen (FIG. 4) described in the first embodiment. FIG. 11B is a diagram showing the light transmittance distribution of the display device equipped with the touch screen 1 including the configurations (four types) obtained by combining the configurations shown in FIGS. 7 and 8. FIG. 11C is a diagram showing the light transmittance distribution of the display device equipped with the touch screen 1 including the configurations (eight types) obtained by combining the configurations shown in FIGS. 7 to 10. It is assumed that circular shapes having different sizes are arranged according to irregular or complicated rules.

  According to the related touch screen, moire occurs as shown in FIG. 11A, and noticeable display unevenness occurs at regular intervals. On the other hand, according to the touch screen 1 including the configuration shown in FIGS. 7 and 8, display unevenness is reduced as shown in FIG. According to the touch screen 1 including the configuration shown in FIGS. 7 to 10, display unevenness is further reduced as shown in FIG.

  As can be seen from the above, according to the second embodiment, it is possible to suppress the occurrence of moiré and to increase the sensitivity for detecting a touch of an indicator or the like, as in the first embodiment. .

  Note that the number of types can be increased only by configuring the arc-shaped curvatures to be different, or by simply configuring the extending directions of the inner wirings 27 and 47 to reduce display unevenness. it can. However, as can be seen from the results shown in FIG. 11, the more types of configurations (wiring patterns) of the first and second wirings 21 and 41 in the first and second units 22 and 42, the more moire and the like. Display unevenness can be reduced. Therefore, if the arc-shaped curvature is different and the extending directions of the inner wirings 27 and 47 are different as in the configuration of the second embodiment, the number of types is increased. Display unevenness can be further reduced.

  Further, according to the second embodiment, a circular shape is applied to the shape of the annular pattern wirings 24 and 44. Therefore, the reflected light alignment pattern in which the normal line of the curved portion is directed in all directions can be realized, so that it is strong only in a specific direction even when illuminated by spot-like external light such as the sun or a light bulb. Generation of reflected light can be suppressed. Therefore, it is possible to suppress the user from feeling uncomfortable such as local glare.

<Embodiment 3>
FIG. 12 is a plan view showing the configuration of the first wiring 21 in the first unit 22 according to Embodiment 3 of the present invention. The configuration of the second wiring 41 in the second unit 42 is also the same.

  In the first wiring 21 and the second wiring 41 shown in FIG. 12, the shape obtained by connecting a plurality of arcs in a ring shape (hereinafter referred to as “arc ring shape”) as the shape of the annular pattern wirings 24 and 44. Has been applied. The circular arc shape here is obtained by replacing the rhombus-shaped straight line shown in FIG. 5 with a sinusoidal waveform for one period. As in the first embodiment, the pattern wiring 24 of at least one first unit 22 is different from the pattern wiring 24 of the other first unit 22 in the size of the circular ring shape, and at least one second unit 22 The pattern wiring 44 of the unit 42 is different from the pattern wiring 44 of the other second unit 42 in the size of the circular ring shape. Note that the arc-shaped coupling wirings 25 and 45 similar to those of the second embodiment are applied to the coupling wirings 25 and 45.

  According to the third embodiment as described above, similarly to the first embodiment, it is possible to suppress the occurrence of display unevenness such as moire and to increase the sensitivity for detecting the touch of an indicator or the like. it can.

<Embodiment 4>
FIG. 13 is a plan view showing the configuration of the first wiring 21 in the first unit 22 according to the fourth embodiment of the present invention. The configuration of the second wiring 41 in the second unit 42 is also the same.

  In the first wiring 21 and the second wiring 41 shown in FIG. 13, the circular ring shape is applied as the shape of the annular pattern wirings 24 and 44. However, the circular arc shape here is obtained by replacing the rhombus-shaped straight lines shown in FIG. 5 with cosine waveforms for 1.5 periods. As in the first embodiment, the pattern wiring 24 of at least one first unit 22 is different from the pattern wiring 24 of the other first unit 22 in the size of the circular ring shape, and at least one second unit 22 The pattern wiring 44 of the unit 42 is different from the pattern wiring 44 of the other second unit 42 in the size of the circular ring shape. Note that the arc-shaped coupling wirings 25 and 45 similar to those of the second embodiment are applied to the coupling wirings 25 and 45.

  According to the fourth embodiment as described above, as in the first embodiment, the occurrence of display unevenness such as moire can be suppressed, and the sensitivity for detecting a touch of an indicator or the like can be increased. it can.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  DESCRIPTION OF SYMBOLS 1 Touch screen, 11 Base board, 21 1st wiring, 22 1st unit, 23 Detection column wiring, 24,44 Pattern wiring, 25,45 Coupling wiring, 26,46 Outer wiring, 27,47 Inner wiring, 41st 2 wirings, 42 second unit, 43 detection row wiring, 61 insulating film, 71 touch panel, 74 switch circuit, 75 detection processing circuit, 81 display panel.

Claims (8)

A transparent substrate;
A first wiring formed on the transparent substrate and made of an opaque conductive material in which a plurality of rectangular first units are defined;
A second wiring made of an opaque conductive material formed on the transparent substrate via the first wiring and an insulating film, wherein a plurality of rectangular second units are defined;
In plan view, the first and second units are alternately arranged in the column direction and the row direction,
The first wiring has, for each first unit, an annular pattern wiring that borders a predetermined shape, and a coupling wiring that is disposed on each diagonal line of the first unit and connected to the pattern wiring. And
The second wiring includes, for each second unit, an annular pattern wiring that borders a predetermined shape, and a coupling wiring that is disposed on each diagonal line of the second unit and connected to the pattern wiring. And
The column wiring for detection is formed by combining the predetermined coupling wirings diagonally adjacent to each other of the plurality of first units,
The predetermined row wirings adjacent to each other of the plurality of second units are joined together to form a detection row wiring,
The pattern wiring of at least one of the first units is different from the pattern wiring of the other first unit in the size of the predetermined shape, and the pattern wiring of at least one of the second units is the other of the first pattern wiring. The touch screen is different in size of the predetermined shape from the pattern wiring of 2 units. The touch screen according to claim 1,
The predetermined shape of the pattern wiring includes at least one of a rhombus shape, a circular shape, and a shape obtained by connecting a plurality of arcs in a ring shape,
The shape of the coupling wiring in a plan view includes at least one of a linear shape and an arc shape. The touch screen according to claim 2,
The shape of the coupling wiring in a plan view includes at least an arc shape,
The arc shape of at least one of the first units has a curvature different from that of the arc shape of the other first unit, and the arc shape of at least one of the second units is the arc of the other second unit. Touch screen with different shape and curvature. A touch screen according to any one of claims 1 to 3,
The first wiring is connected to the outer peripheral portion of the pattern wiring instead of the coupling wiring, and the outer wiring disposed on each diagonal line of the first unit, and the inner peripheral portion of the pattern wiring And having an inner wiring that is connected and has a different extension direction from the outer wiring,
The second wiring is connected to the outer peripheral portion of the pattern wiring instead of the coupling wiring, and the outer wiring disposed on each diagonal line of the second unit; and the inner peripheral portion of the pattern wiring; A touch screen that is connected and has an outer wiring and an inner wiring having a different extending direction. A touch screen according to any one of claims 1 to 4,
A switch circuit for sequentially selecting each of the plurality of detection column wirings and each of the plurality of detection row wirings;
Capacitance formed between the detection column wiring selected by the switch circuit and an indicator touching the touch screen, and the detection row wiring selected by the switch circuit, A touch panel comprising: a detection processing circuit that calculates touch coordinates on the touch screen indicating a touch position of the indicator based on a detection result of capacitance formed between the indicator and the indicator. A touch screen according to any one of claims 1 to 4,
A switch circuit for sequentially selecting each of the plurality of detection column wirings and each of the plurality of detection row wirings;
Based on the detection result of the change in mutual capacitance between the detection column wiring and the detection row wiring selected by the switch circuit in response to the touch of the indicator on the touch screen, A touch panel comprising: a detection processing circuit that performs a process of calculating touch coordinates on the touch screen that indicates a touch position. The touch panel according to claim 5 or 6,
And a display panel mounted on the touch screen of the touch panel. The display device according to claim 7,
The touch screen is adhesively fixed to the front side of the display panel.

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