JP2016071670A - Touch panel-equipped liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate visual confirmation of the connection state between a terminal electrode of a touch panel and a terminal electrode of an FPC in an integrated state of a liquid crystal display panel and the touch panel.SOLUTION: A touch panel-equipped LCD comprises: a plurality of gate signal lines on one surface of an array side substrate; a plurality of image signal lines crossing the gate signal lines; a pixel part including a TFT element and a pixel electrode, which is formed in cross part between the gate signal lines and the image signal lines; a color filter side substrate one surface of which is opposite to the one surface of the array side substrate with a liquid crystal interposed therebetween; a detection electrode formed on an opposite surface to the one surface of the color filter side substrate; and a plurality of terminal electrodes 24 formed at an end of the opposite surface and electrically connected to the detection electrode. A routing wiring line 12 is formed on an end side on the one surface of the array side substrate, and a half or less of the plurality of terminal electrodes 24 overlap the routing wiring line 12 in a plan view.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a liquid crystal display device with a touch panel in which detection electrodes of a touch panel are directly formed on a display side surface of a liquid crystal display panel.

  An example of a conventional liquid crystal display (LCD) equipped with a touch panel is shown in FIG. FIG. 5 is a side sectional view of a conventional LCDLT2 with a touch panel. This LCDLT2 with a touch panel is produced by separately manufacturing a liquid crystal display panel L2 and a touch panel T2, and a highly transparent adhesive on the surface (upper surface) facing the liquid crystal 35 side surface of the color filter side substrate 36 of the liquid crystal display panel L2. The touch panel T2 is placed and bonded via a transfer tape (Optically Clear Adhesive Tape: OCA) or the like (see, for example, Patent Document 1).

  The liquid crystal display panel L2 includes an array side substrate 31 formed of a glass substrate or the like on which a large number of pixel portions 34 including thin film transistor (TFT) elements are formed, a glass substrate on which a color filter and a black matrix are formed, and the like. The color filter side substrate 36 is made to face each other, the substrates are bonded together at a predetermined interval, and the liquid crystal 35 is filled and sealed between the substrates. In general, the color filter side substrate 36 has a liquid crystal between the pixel electrode 33 and the entire surface of the surface on the liquid crystal 35 side facing the pixel portion 34 including the TFT elements 32 and the pixel electrodes 33. A common electrode 39 for forming a vertical electric field applied to 35 is formed. In the case of an IPS (In-Plane Switching) type LCD, the common electrode 39 is formed on the pixel portion 34 of the array side substrate 31 in the same plane as the pixel electrode 33, thereby generating a horizontal electric field. Further, in the case of a FFS (Fringe Field Switching) type LCD, the common electrode 39 is formed on the pixel portion 34 of the array side substrate 31 with an insulating layer sandwiched above or below the pixel electrode 33, thereby causing an end electric field (fringe). Electric field). In addition, on the surface of the color filter side substrate 36 on the liquid crystal 35 side, red (R), green (G), and blue (B) color filters 37 corresponding to the pixel portions 34 are formed. A black matrix that prevents light passing through 34 from interfering with each other is formed so as to surround the outer periphery of the color filter 37. An overcoat layer 38 is formed so as to cover the color filter layer 37, and a common electrode 39 is formed on the overcoat layer 38.

  Further, the entire periphery of the edge of the surface on the liquid crystal 35 side of the array side substrate 31 and the entire periphery of the edge of the surface on the liquid crystal 35 side of the color filter side substrate 36 are made of silicone resin, epoxy resin, synthetic rubber or the like. It is bonded and sealed by the stop member 40. Further, a portion of the surface on the liquid crystal 35 side of the array side substrate 31 that protrudes to the outside from the sealing member 40 is a drive circuit element 41 as a gate signal line drive circuit or an image signal line drive circuit made of IC, LSI or the like. Is mounted by a mounting method such as a COG (Chip On Glass) method, and a flexible printed circuit board (FPC) 44 that inputs and outputs drive signals and control signals to and from the drive circuit element 41 from the outside. It is installed at the end of the protruding part. Reference numeral 42 denotes an LCD gate signal line, an image signal line, and a routing wiring for connecting the driving circuit element 41, and 43 denotes a terminal electrode for electrically connecting the driving circuit element 41 and the circuit wiring of the FPC 44. is there.

  FIG. 9 is a block circuit diagram showing a basic configuration of an active matrix type and IPS type LCD. For example, the LCD array-side substrate 107 includes a plurality of gate signal lines 105 (GL1, GL2, GL3... GLn) formed in a first direction (for example, a row direction) thereon, A plurality of image signal lines 106 (SL1, SL2, SL3... SLm) formed to intersect the gate signal line 105 in a second direction (for example, the column direction) that intersects the direction, and the gate signal line 105. Between the TFT element 101, the pixel electrode (PE11, PE12, PE13... PEnm) and the pixel electrode (PE11, PE12, PE13... PEnm) formed at the intersection of the image signal line 106 and the pixel electrode. .., Pnm including a common electrode for forming a horizontal electric field applied to, and a common voltage line 102 for supplying a common voltage (Vcom) to the common electrode. Reference numeral 103 denotes a gate signal line driving circuit, 104 denotes an image signal (source signal) line driving circuit, and 110 denotes a display unit.

  In the touch panel T2, a detection electrode 52 made of a transparent electrode such as indium tin oxide (ITO) is formed on one surface of a lower substrate 51, and an upper substrate 53 as a protective substrate is formed on the detection electrode 52. Is provided. Further, an FPC 56 for inputting / outputting a detection signal and the like between the detection electrode 52 and an external detection means or the like is installed at the end of the upper surface of the lower substrate 51. Reference numeral 54 denotes a routing wire for connecting the detection electrode 52 and the terminal electrode 55, and 55 denotes a terminal electrode for electrically connecting the routing wire 54 and the circuit wiring of the FPC 56.

  Since the LCDLT2 with a touch panel shown in FIG. 5 is configured by laminating the liquid crystal display panel L2 and the touch panel T2, the thickness tends to increase. In order to reduce the thickness, there has been proposed LCDLT3 with a touch panel in which the detection electrodes of the touch panel are directly formed on the surface of the color filter side substrate of liquid crystal display panel L3 as shown in FIG. The liquid crystal display panel L3 is manufactured by making the array side substrate 61 and the color filter side substrate 66 face each other, bonding the substrates at a predetermined interval, and filling and enclosing the liquid crystal 65 between the substrates. Is done. In general, the color filter side substrate 66 is disposed between the pixel electrode 63 and the liquid crystal 65 on the entire surface on the side facing the pixel portion 64 including the TFT element 62 and the pixel electrode 63, that is, the surface on the liquid crystal 65 side. A common electrode 69 for forming a vertical electric field applied to 65 is formed. In the case of an IPS LCD, the common electrode 69 is formed on the pixel portion 64 of the array side substrate 61 in the same plane as the pixel electrode 63, thereby generating a horizontal electric field. Further, in the case of an FFS type LCD, the common electrode 69 is formed on the pixel portion 64 of the array side substrate 61 with an insulating layer sandwiched above or below the pixel electrode 63 to generate an end electric field (fringe electric field). It will be a thing. Further, on the surface of the color filter side substrate 66 on the liquid crystal 65 side, red (R), green (G), and blue (B) color filters 67 corresponding to the respective pixel portions 64 are formed. A black matrix that prevents light passing through 64 from interfering with each other is formed so as to surround the outer periphery of the color filter 67. An overcoat layer 68 is formed so as to cover the color filter layer 67, and a common electrode 69 is formed on the overcoat layer 68.

  Further, the entire periphery of the edge of the surface on the liquid crystal 65 side of the array side substrate 61 and the entire periphery of the edge of the surface on the liquid crystal 65 side of the color filter side substrate 66 are bonded and sealed by the sealing member 70. . Further, a portion of the surface on the liquid crystal 65 side of the array side substrate 61 that protrudes from the sealing member 70 to the outside is a drive circuit element 71 as a gate signal line drive circuit or an image signal line drive circuit made of IC, LSI or the like. Is mounted by a mounting method such as a COG method, and an FPC 74 that inputs and outputs drive signals and control signals from the outside to the drive circuit element 71 is installed at the end of the protruding portion. Reference numeral 72 denotes a gate signal line of the liquid crystal display panel L3, a lead wiring for connecting the image signal line and the driving circuit element 71, and 73 denotes an electric connection between the driving circuit element 71 and the circuit wiring of the FPC 74. It is a terminal electrode.

  The detection electrode 81 of the touch panel T3 is directly formed on the surface (upper surface) facing the surface on the liquid crystal 65 side of the color filter side substrate 66. A substrate 82 made of a glass substrate or the like as a protective substrate is provided on the detection electrode 81. Further, an FPC 85 for inputting / outputting a detection signal and the like between the detection electrode 81 and an external detection means or the like is installed at the end of the upper surface of the color filter side substrate 66. Reference numeral 83 denotes a routing wire for connecting the detection electrode 81 and the terminal electrode 84, and 84 is a terminal electrode for electrically connecting the routing wire 83 and the circuit wiring of the FPC 85.

  FIG. 7 is a plan view showing detection electrodes and the like of the capacitive touch panel T3. The detection electrode 81 includes an X detection electrode 81X formed to extend in the X direction (for example, the row direction) on the upper surface of the color filter side substrate 66, and a Y formed to extend in the Y direction (for example, the column direction). A detection electrode 81Y and a bridge electrode 81b for preventing the X detection electrode 81X and the Y detection electrode 81Y from being short-circuited and for connecting the electrode portions of the X detection electrode 81X to each other are provided. The terminal electrode 84 group is intensively arranged at the end of the upper surface of the color filter side substrate 66. Reference numeral 84a denotes a terminal electrode region.

  FIG. 8 is a perspective plan view of the touch panel T3 of the LCDLT 3 with a touch panel. A plurality of gate signal lines 61g formed in the first direction (for example, the row direction) on the upper surface of the array-side substrate 61, and the second direction (for example, the column direction) intersecting the first direction. A plurality of image signal lines 61s formed intersecting with the gate signal line 61g, and a pixel portion 64 including the TFT element 62 and the pixel electrode 63 formed at the intersection of the gate signal line 61g and the image signal line 61s; , Is formed. A drive circuit element 71 for inputting an image signal to the image signal line 61s is provided on one edge portion of the upper surface of the array side substrate 61, and a gate is provided on the other edge portion of the upper surface of the array side substrate 61. A drive circuit element 71a for inputting a gate signal to the signal line 61g is provided. Reference numeral 65a denotes a display portion, 72a denotes a lead wiring for connecting the gate signal line 61g and the driving circuit element 71a, and 73a denotes a terminal electrode for electrically connecting the driving circuit element 71a and the circuit wiring of the FPC 74a.

JP 2010-128676 A

  In the conventional LCDLT3 with a touch panel, it is necessary to visually confirm the connection state between the terminal electrode 84 and the terminal electrode of the FPC 85 from the lower surface side of the array-side substrate 61 (the direction indicated by the white arrow in FIG. 6). This is because the FPC 85 is installed on the color filter side substrate 66 after the liquid crystal display panel L3 and the touch panel T3 are integrally manufactured. As shown in FIG. 8, the terminal electrode region 84a of the touch panel T3 is formed so as not to overlap with the routing wiring 72 of the liquid crystal display panel L3 as much as possible in plan view. This is for the purpose of enabling visual confirmation of the connection state between the terminal electrode 84 and the terminal electrode of the FPC 85. However, the terminal electrode region 84a does not overlap the routing wire 72 because all the routing wires 72 need to be routed so as to avoid the terminal electrode region 84a and the drive circuit element 71 is enlarged. It has become difficult to form. In the case of the LCDLT2 with a touch panel in which the touch panel T2 is manufactured separately from the liquid crystal display panel L2 as shown in FIG. 5, the touch panel T2 is attached to the liquid crystal display panel L2 after the FPC 56 is mounted on the touch panel T2. The connection state of the FPC 56 can be confirmed for a single unit. Therefore, the above problems do not occur.

  The present invention has been completed in view of the above problems, and its purpose is to easily confirm the connection state between the terminal electrode of the touch panel and the FPC in a state where the liquid crystal display panel and the touch panel are integrated. The touch panel-equipped LCD is used.

  The liquid crystal display device with a touch panel according to the present invention includes a plurality of gate signal lines formed in a first direction on one surface of a first substrate, and the gate signal lines in a second direction crossing the first direction. A plurality of image signal lines formed to intersect with each other, a pixel portion including a thin film transistor element and a pixel electrode formed at an intersection of the gate signal line and the image signal line, and the first substrate. A second substrate facing one surface with liquid crystal sandwiched between one surface, a detection electrode formed on a surface facing the one surface of the second substrate, and detecting the contact of the detected object; and the second substrate A plurality of terminal electrodes that are electrically connected to the detection electrodes, and the first substrate has the end portions on the one surface. A wiring line is formed on the side, and the plurality of terminal electrodes are A configuration in which these half the number of less overlap with the lead-out lines in a plan view.

  In the liquid crystal display device with a touch panel according to the present invention, preferably, a plurality of the terminal electrodes are overlapped with the lead wiring every other one or more in a plan view.

  In the liquid crystal display device with a touch panel of the present invention, preferably, the peripheral edge of the one surface of the first substrate and the peripheral edge of the one surface of the second substrate are sealed with a translucent sealing material. .

  The liquid crystal display device with a touch panel according to the present invention crosses a plurality of gate signal lines formed in a first direction on one surface of a first substrate and a gate signal line in a second direction intersecting the first direction. A plurality of image signal lines formed, a pixel portion including a thin film transistor element and a pixel electrode formed at an intersection of the gate signal line and the image signal line, and a liquid crystal sandwiched between one surface of the first substrate A second substrate facing one surface, a detection electrode formed on a surface facing the one surface of the second substrate for detecting contact of the detection target, and an end of the facing surface of the second substrate; A plurality of terminal electrodes that are electrically connected to the detection electrode, and the first substrate has a lead wiring formed on the end side of the one surface. The number of terminal electrodes is less than half of those terminal electrodes, Since being made a connection between the terminal electrodes and the FPC terminal of the touch panel can be easily confirmed by an integrated state of the liquid crystal display panel and the touch panel. As a result, connection failure between the touch panel and the FPC can be reduced.

  In the liquid crystal display device with a touch panel according to the present invention, preferably, every other terminal electrode overlaps with the lead wiring in a plan view every other terminal electrode. Therefore, the terminal electrode (terminal electrode) overlaps with the lead wiring in a plan view. The terminal electrode (referred to as terminal electrode D0) that does not overlap with the routing wiring in a plan view exists on both sides of D1). As a result, it becomes easier to confirm the connection state between the terminal electrode of the touch panel and the terminal of the FPC in a state where the liquid crystal display panel and the touch panel are integrated. That is, if the terminal electrodes D0 on both sides of the terminal electrode D1 are well connected to the FPC terminal electrode in plan view, the terminal electrode D1 is also superposed to the FPC terminal electrode in plan view. It can be inferred that they are connected. As a result, connection failure between the touch panel and the FPC can be further reduced.

  In the liquid crystal display device with a touch panel of the present invention, preferably, the periphery of the upper surface of the first substrate and the periphery of the lower surface of the second substrate are sealed with a light-transmitting sealing material. It becomes easier to visually recognize the terminal electrode. As a result, connection failure between the touch panel and the FPC can be further reduced.

FIG. 1 is a diagram showing an example of an embodiment of a liquid crystal display device with a touch panel according to the present invention, and is a side sectional view of the liquid crystal display device with a touch panel. FIG. 2 is a plan view showing detection electrodes and the like of the touch panel in the liquid crystal display device with a touch panel of FIG. 3 is a see-through plan view of the touch panel portion of the liquid crystal display device with a touch panel shown in FIG. 4A to 4C are enlarged plan views showing enlarged terminal electrode regions of the touch panel in the liquid crystal display device with a touch panel in FIG. 1, respectively. FIG. 5 is a side sectional view of an example of a conventional liquid crystal display device with a touch panel. FIG. 6 is a side sectional view of another example of a conventional liquid crystal display device with a touch panel. FIG. 7 is a plan view showing detection electrodes and the like of the touch panel in the liquid crystal display device with a touch panel of FIG. 8 is a see-through plan view of the touch panel portion of the liquid crystal display device with a touch panel shown in FIG. FIG. 9 is a block circuit diagram showing a basic configuration of a conventional liquid crystal display device.

  Hereinafter, embodiments of an LCD with a touch panel according to the present invention will be described with reference to the drawings. However, each drawing referred to below shows a main part for explaining the LCD with a touch panel of the present invention among the constituent members in the embodiment of the LCD with a touch panel of the present invention. Therefore, the LCD with a touch panel according to the present invention may include known constituent members such as a circuit board, a wiring conductor, a control IC, and an LSI that are not shown in the drawing.

  FIG. 1 is a diagram showing an example of an embodiment of an LCD with a touch panel according to the present invention, and is a side sectional view of the LCD with a touch panel. As shown in FIG. 1, the LCDLT1 with a touch panel according to the present invention has a plurality of pieces formed in a first direction (for example, a row direction) of an upper surface of an array side substrate 1 made of a glass substrate or the like as a first substrate. A gate signal line, a plurality of image signal lines formed to intersect the gate signal line in a second direction (for example, the column direction) intersecting the first direction, and the intersection of the gate signal line and the image signal line The color filter side as a second substrate comprising a pixel portion 4 including the TFT element 2 and the pixel electrode 3 formed in the portion, and a glass substrate or the like facing one surface with the liquid crystal 5 sandwiched between one surface of the array side substrate 1 A detection electrode 21 for detecting contact between the substrate 6 and the surface opposite to the one surface to be detected, and a detection electrode 21 formed at an end of the opposite surface of the color filter side substrate 6. Multiple ends that are electrically connected with The array-side substrate 1 has the wiring 12 formed on the end portion side in a plan view of the one surface, and the plurality of terminal electrodes 24 has a number less than half of them. Is overlapped with the routing wiring 12 in plan view. With this configuration, it is easy to check the connection state between the terminal electrode 24 of the touch panel T1 and the FPC 25 in a state where the liquid crystal display panel L1 and the touch panel T1 are integrated. As a result, connection failure between the touch panel T1 and the FPC 25 can be reduced. The routing wiring 12 corresponds to a wiring for connecting the driving circuit element 11 to the image signal line and the gate signal line, a Vcom wiring, a wiring between the driving circuit elements 11, and the like.

  The liquid crystal display panel L1 is manufactured by making the array side substrate 1 and the color filter side substrate 6 face each other, bonding the substrates at a predetermined interval, and filling and enclosing the liquid crystal 5 between the substrates. Is done. Further, for example, the color filter side substrate 6 has a common electrode 9 for forming a vertical electric field to be applied to the liquid crystal 5 between the pixel electrode 3 and the entire lower surface thereof, that is, the entire surface on the liquid crystal 5 side. In the case of an IPS LCD, the common electrode 9 is formed in the same plane as the pixel electrode 3 in the pixel portion 4 of the array side substrate 1 to generate a lateral electric field. Further, in the case of an FFS-type LCD, the common electrode 9 is formed on the pixel portion 4 of the array-side substrate 1 with an insulating layer interposed above or below the pixel electrode 3 to generate an end electric field (fringe electric field). It will be a thing. Also, red (R), green (G), and blue (B) color filters 7 corresponding to each pixel unit 4 are formed on the lower surface of the color filter side substrate 6 and pass through each pixel unit 4. A black matrix that prevents light from interfering with each other is formed so as to surround the outer periphery of the color filter 7. An overcoat layer 8 is formed so as to cover the color filter layer 7, and a common electrode 9 is formed on the overcoat layer 8.

  Further, the entire periphery of the edge of the upper surface of the array side substrate 1, that is, the surface on the liquid crystal 5 side, and the entire periphery of the edge of the lower surface of the color filter side substrate 6 are made of silicone resin, acrylic resin, epoxy resin, synthetic rubber or the like. It is bonded and sealed by the sealing member 10. Further, a drive circuit element 11 as a gate signal line drive circuit or an image signal line drive circuit made of IC, LSI or the like is provided at a portion of the upper surface of the array-side substrate 1 protruding from the sealing member 10 to the outside. In addition, an FPC 14 that inputs and outputs drive signals and control signals from the outside to the drive circuit element 11 is installed at the end of the protruding portion. Reference numeral 12 denotes a gate signal line of the liquid crystal display panel L1, a lead wiring for connecting the image signal line and the driving circuit element 11, etc., and 13 an electric connection between the driving circuit element 11 and the circuit wiring of the FPC 14. It is a terminal electrode.

  The detection electrode 21 of the touch panel T1 is directly formed on the upper surface of the color filter side substrate 6, that is, the surface facing the surface on the liquid crystal 5 side. A substrate 22 made of a glass substrate or the like as a protective substrate is provided on the detection electrode 21. In addition, an FPC 25 for inputting / outputting detection signals and the like between the detection electrode 21 and external detection means is installed at the end of the upper surface of the color filter side substrate 6. Reference numeral 23 denotes a routing wire for connecting the detection electrode 21 and the terminal electrode 24, 24 is a terminal electrode for electrically connecting the routing wire 23 and the circuit wiring of the FPC 25, and the terminal electrode 24 is a terminal of the FPC 25. Connected with the electrode.

  FIG. 2 is a plan view showing detection electrodes and the like of the capacitive touch panel T1. The detection electrode 21 has an X detection electrode 21X formed to extend in the X direction (for example, the row direction) on the upper surface of the color filter side substrate 6, and a Y formed to extend in the Y direction (for example, the column direction). A detection electrode 21Y and a bridge electrode 21b for preventing the X detection electrode 21X and the Y detection electrode 21Y from being short-circuited and for connecting the electrode portions of the X detection electrode 21X to each other are provided. The terminal electrode 24 group is intensively arranged at the end of the upper surface of the color filter side substrate 6. Reference numeral 24a denotes a terminal electrode region.

  FIG. 3 is a perspective plan view of the touch panel T1 portion of the LCDLT 1 with a touch panel. A plurality of gate signal lines 1g formed in the first direction on the upper surface of the array-side substrate 1 and a plurality formed by intersecting the gate signal lines 1g in a second direction intersecting the first direction. The image signal line 1s and the pixel portion 4 including the TFT element 2 and the pixel electrode 3 formed at the intersection of the gate signal line 1g and the image signal line 1s are formed. A drive circuit element 11 for inputting an image signal to the image signal line 1 s is provided at one edge of the upper surface of the array side substrate 1, and a gate is provided at the other edge of the upper surface of the array side substrate 1. A drive circuit element 11a for inputting a gate signal to the signal line 1g is provided. Reference numeral 5a denotes a display portion, 12a denotes a lead wiring for connecting the gate signal line 1g and the driving circuit element 11a, and 13a denotes a terminal electrode for electrically connecting the driving circuit element 11a and the circuit wiring of the FPC 14a.

  As shown in FIG. 3, in the LCDLT 1 with a touch panel according to the present invention, the array side substrate 1 is installed on the side of the top surface (the end portion where the terminal electrode 24 of the color filter side substrate 6 is formed) side in plan view. The lead wiring 12 for connecting the drive circuit element 11 and the image signal line formed is formed, and a plurality of the terminal electrodes 24 overlap with the lead wiring 12 in plan view in less than half thereof. As shown in FIGS. 4A and 4B, it is preferable that a plurality of terminal electrodes 24 overlap with every other wiring 12 in plan view. In this case, a terminal electrode (referred to as terminal electrode D0) that does not overlap with the lead wiring 12 in plan view exists on both sides of the terminal electrode (referred to as terminal electrode D1) that overlaps with the lead wiring 12 in plan view. Become. As a result, it becomes easier to confirm the connection state between the terminal electrode 24 of the touch panel T1 and the terminal electrode of the FPC 25 in a state where the liquid crystal display panel L1 and the touch panel T1 are integrated. That is, if the terminal electrodes D0 on both sides of the terminal electrode D1 are well connected to the terminal electrode of the FPC 25 in a plan view, the terminal electrode D1 is also superposed to the terminal electrode of the FPC 25 in a plan view. It can be inferred that they are connected. Therefore, connection failure between the touch panel T1 and the FPC 25 can be reduced. Note that the number of the lead wires 12 overlapping the terminal electrode D1 in a plan view is about 1 to several tens. Moreover, as shown to Fig.4 (a), it is preferable that the some terminal electrode 24 is three or more.

  4A shows a configuration in which every other plurality of terminal electrodes 24 overlaps with the routing wiring 12 in plan view, and FIG. 4B shows a configuration in which every plurality of terminal electrodes 24 runs every other wiring 12. And overlapping in plan view. The plurality of terminal electrodes 24 overlap with the routing wiring 12 every n (n is an integer of 1 or more) in plan view, and n is preferably 1 to 3. If n exceeds 3, the number of routing wires 12 overlapping one terminal electrode 24 increases, and the distance between the routing wires 12 becomes narrow. As a result, stray capacitance tends to occur or a short circuit tends to occur. In addition, as for the dimension of the terminal electrode 24, when it is a rectangular thing, the length of a short side is about 100 micrometers-300 micrometers. Further, as shown in FIG. 4C, the routing wiring 12 may be overlapped in the gap between the adjacent terminal electrodes 24. In this case, a larger number of routing wires 12 can be superimposed on the terminal electrode region 24a.

  In the LCDLT 1 with a touch panel according to the present invention, it is preferable that the peripheral edge of the upper surface of the array side substrate 1 and the peripheral edge of the lower surface of the color filter side substrate 6 are sealed with a translucent sealing material 10. In this case, it becomes easier to visually recognize the terminal electrode 24 of the touch panel T1. The sealing material 10 can be formed of a resin material having translucency such as a silicone resin and an acrylic resin. Moreover, the sealing material 10 does not need to be completely transparent, and may have some colors such as yellow. Moreover, it is preferable that the color filter side substrate 6 is provided with a non-light-shielding layer (black mask layer) non-formation part in a portion including the terminal electrode region 24a on the surface on the liquid crystal 5 side. In this case, it is possible to prevent the terminal electrode region 24a from becoming difficult to visually recognize due to the light shielding layer.

  The LCDLT1 with a touch panel according to the present invention has a terminal after the FPC 25 is connected to the terminal electrode 24 of the color filter side substrate 6 in the liquid crystal display panel L1 configured by bonding the array side substrate 1 and the color filter side substrate 6 together. The connection state between the electrode 24 and the terminal electrode of the FPC 25 is confirmed visually. At this time, it is preferable that an indentation such as a dent for visual recognition is formed on the surface of the terminal electrode 24 in a state where the terminal electrode 24 and the terminal electrode of the FPC 25 are connected. The terminal electrode 24 is made of a metal layer, for example, a laminated structure in which an Nd layer or a Ti layer is laminated on an Al layer, or a single layer structure such as a Mo layer, and an insulating layer formed on the foundation layer And an ITO layer formed on the insulating layer. And since the thickness of the terminal electrode 24 is as very thin as about 100 nm, if an indentation such as a dent for visual recognition is formed on the surface, the indentation can be easily visually recognized from the lower surface side of the array side substrate 1. The connection state of the electrode 24 can be visually recognized. For example, when the indentation connects the terminal electrode 24 and the terminal electrode of the FPC by press-contacting them through an anisotropic conductive film containing conductive particles having a diameter of about several μm, the conductive particles The terminal electrode 24 is formed by being pressed into the terminal electrode 24 from the surface thereof. The terminal electrodes 13 and 24 and the lead wirings 12 and 23 can be formed by a thin film forming method such as a CVD (Chemical Vapor Deposition) method or a sputtering method.

  When the touch panel T1 is, for example, a projection capacitive type, it has the following configuration. For example, a bridge electrode (relay electrode) formed on one surface of the color filter side substrate 6 (a surface facing the surface on the liquid crystal 5 side) for connecting the detection electrode portions of the Y detection electrode, and a transparent electrode thereon X detection electrode formed of an insulator layer and an ITO (Indium Tin Oxide) transparent electrode extending in a specific direction (for example, x direction) formed on the transparent insulator layer, and a detection electrode of the X detection electrode And a Y detection electrode composed of an ITO transparent electrode or the like extending in a direction orthogonal to the specific direction (for example, the y direction). The bridge electrode is connected to the detection electrode portion of the Y detection electrode by a contact hole or the like. Thereby, it is possible to capture a change in capacitance due to electrostatic coupling between the upper electrode line and the lower electrode line when an electrostatic conductor such as a human fingertip approaches the capacitance detection region. Then, by specifying the upper electrode line and the lower electrode line where the capacitance change has occurred by an external control IC (Integrated Circuit), a control LSI (Large Scale Integrated Circuit), etc., in the capacitance detection region The position where the capacitance has changed can be specified two-dimensionally, that is, in a plane.

  The touch panel T1 of the present invention has various methods such as a matrix switch method, a resistive film method, a surface acoustic wave method (ultrasonic method), an infrared method, an electromagnetic induction method, a surface capacitance method, and a projection capacitance method. You can adopt things. Of these, the surface capacitance type is suitably used for touch panels of 10 inches or more. The capacitance detection part in the surface-type capacitive touch panel is composed of, for example, three layers of a transparent coating layer, a transparent conductive film, and a glass substrate, and the transparent conductive film is an electrode provided at four corners of the glass substrate. Connected to. A uniform electric field is formed on the surface of the transparent coating layer on the glass substrate by the transparent conductive film. When an electrostatic conductor such as a human finger touches the surface of the capacitance detection unit, a weak current from the drive circuit passes through the electrodes at the four corners, the transparent conductive film, the transparent coating layer, and the finger. Thus, a closed circuit is formed in an equivalent circuit between the surrounding environment such as the ground and the drive circuit. The position of a finger or the like can be determined by calculating the ratio of currents at the electrodes at the four corners by the drive circuit. A surface-type capacitive touch panel can be manufactured at low cost because of its simple structure, and is suitably used for a large touch panel.

  The projected capacitive method can detect multiple points on the contact portion with a finger or the like. For example, a capacitance detection unit in a projected capacitive touch panel includes a bridge electrode formed on a substrate such as a glass substrate, a transparent insulator layer thereon, and a transparent electrode layer thereon. The transparent electrode layer is formed of a first detection electrode pattern made of ITO or the like (X detection electrode 21X in FIG. 2) formed such that detection electrode portions having a square shape, a rhombus shape, a diamond shape, or the like extend continuously in a predetermined direction. ) And a second detection electrode pattern made of ITO or the like (Y in FIG. 2) formed so that detection electrode portions having a quadrangular shape, a diamond shape, a diamond shape, or the like extend in a direction perpendicular to the predetermined direction. Detection electrode 21Y). The bridge electrode connects between the detection electrode portions of the second detection electrode pattern, and is connected to the detection electrode portion by a contact hole or the like. Then, when an electrostatic conductor such as a human finger touches the surface of the capacitance detection unit, a change in capacitance of about 1 pF in the first and second detection electrode patterns in the vicinity thereof is detected. Thus, the position of the contact portion can be detected two-dimensionally with high accuracy. Further, since the electrical resistance of the first and second detection electrode patterns increases as the length increases, the resistance can be reduced by connecting to the metal wiring, and the size can be increased. This projected capacitive touch panel is capable of multipoint detection by a control IC, LSI, etc. that detects the position of the contact portion, and has high practicality, so that it can be suitably used for a tablet-type portable terminal or the like. .

  In addition, since the projected capacitive touch panel detects a change in capacitance in the first and second detection electrode patterns, an electrostatic conductor such as a human finger is attached to the capacitance detection unit. Even in the case of proximity without directly touching the surface, the position of the proximity portion can be detected two-dimensionally with high accuracy.

  Note that the LCD with a touch panel of the present invention is not limited to the above embodiment, and may include appropriate design changes and improvements.

  The LCD with a touch panel of the present invention can be applied to various electronic devices. The electronic devices include automobile route guidance system (car navigation system), ship route guidance system, aircraft route guidance system, smartphone terminal, mobile phone, tablet terminal, personal digital assistant (PDA), video camera, digital still camera, electronic Notebook, electronic book, electronic dictionary, personal computer, copier, game device terminal, television, product display tag, price display tag, industrial programmable display, car audio, digital audio player, facsimile, printer, cash There are automatic teller machines (ATMs), vending machines, digital display watches, and the like.

DESCRIPTION OF SYMBOLS 1 Array side board | substrate 2 TFT element 3 Pixel electrode 4 Pixel part 5 Liquid crystal 6 Color filter side board | substrate 7 Color filter 8 Overcoat layer 9 Common electrode 10 Sealing material 11 Drive circuit element 12 Lead-out wiring 13 Terminal electrode 14 FPC
21 detection electrode 22 substrate 23 routing wiring 24 terminal electrode 25 FPC

Claims (3)

  A plurality of gate signal lines formed in a first direction on one surface of the first substrate, and a plurality of gate signal lines formed to intersect the gate signal lines in a second direction intersecting the first direction. An image signal line, a pixel portion including a thin film transistor element and a pixel electrode formed at an intersection of the gate signal line and the image signal line, and one surface of the first substrate facing each other with a liquid crystal interposed therebetween A second substrate, a detection electrode formed on a surface of the second substrate facing the one surface and detecting the contact of the detection target, and formed at an end of the second substrate facing the surface of the second substrate; A plurality of terminal electrodes electrically connected to the detection electrode, and the first substrate has a lead wiring formed on the end portion side of the one surface, The number of terminal electrodes is less than half of the number of the lead wires With a touch panel are overlapped in a plan view a liquid crystal display device.   2. The liquid crystal display device with a touch panel according to claim 1, wherein a plurality of the terminal electrodes are overlapped with the lead wiring in a plan view every other one or more.   The liquid crystal display with a touch panel according to claim 1 or 2, wherein a peripheral edge of the one surface of the first substrate and a peripheral edge of the one surface of the second substrate are sealed with a light-transmitting sealing material. apparatus.