JP5573540B2 - Touch panel - Google Patents

Description

The present invention relates to a data touch panel.

FIG. 11 shows a schematic configuration diagram of the touch panel. This device is a device in which a touch panel function is built in a liquid crystal display device, and is also an image display device. In this apparatus, a first substrate (TFT substrate) and a second substrate (color filter substrate) are arranged to face each other, and a plurality of pixel electrodes 1 are arranged on the first substrate in the first direction (X direction) and the second direction. They are formed at regular intervals in the second direction (Y-direction). Each pixel electrode 1 is formed in a rectangular shape. A thin film transistor (hereinafter referred to as TFT) 2 as a pixel transistor is connected to one end of each pixel electrode 1.

  Between each pixel electrode 1 in the X direction, a data wiring 3 as a signal line is wired, and between each predetermined number of pixel electrodes 1, an X coordinate detection wiring 4 is wired.

Each between each pixel electrode 1 in the Y direction, the TFT2 are arranged, the gate wiring 5 as a scanning line, a storage capacitor lines 6, and Y coordinate detection lines 7 are wiring.

  Each of the plurality of TFTs 2 has a gate electrode connected to the gate wiring 5, a drain electrode connected to the data wiring 3, and a source electrode connected to the pixel electrode 1. Further, an auxiliary capacitor 8 is formed by the pixel electrode 1 and the auxiliary capacitor line 6.

  Each X coordinate detection wiring 4 is provided with an X coordinate detection contact portion 9, and each Y coordinate detection wiring 7 is provided with a Y coordinate detection contact portion 10. The X-coordinate detection contact portion 9 provides contacts on the first substrate and the second substrate, respectively, and generates X-coordinate signals when the respective contacts are conducted. Similarly, the Y coordinate detection contact portion 10 is provided with a contact on each of the first substrate and the second substrate, and a Y coordinate signal is generated when the respective contacts are conducted.

  As a touch panel technology, there is, for example, Patent Document 1.

JP 2007-95044 A

However, in the touch panel, the TFT 2, the gate wiring 5, and the auxiliary capacitance wiring 6 are arranged between the Y directions of the pixel electrodes 1, and the X coordinate is arranged on the Y coordinate detection wiring 7 and the Y coordinate detection wiring 7. The detection contact portion 9 or the Y coordinate detection contact portion 10 or the base portion 11 is arranged.

As a factor contributing to the improvement of the display performance of the liquid crystal display device, for example, the display brightness, for example, the size of each pixel electrode 1, that is, the aperture ratio of the liquid crystal display device is increased. However, in the liquid crystal display device, the TFT 2, the gate wiring 5, and the auxiliary capacitance wiring 6 are arranged between the pixel electrodes 1, and the Y coordinate detection wiring 7 and the Y coordinate detection wiring 7 are used as touch functions. Since the X-coordinate detection contact portion 9 or the Y-coordinate detection contact portion 10 or the base portion 11 is disposed at the same position, the size of each pixel electrode 1, that is, the aperture ratio as a liquid crystal display device cannot be increased.

An object of the present invention, it is possible to increase the aperture ratio, it is to provide a filter touch panel can be improved display performance.

To fulfill the pre-Symbol purpose, one embodiment of the touch panel of the present invention is sealed between the first substrate and the second substrate, the first substrate and the second substrate which face each other A liquid crystal layer, a plurality of pixel electrodes provided on the first substrate, arranged in a first direction and a second direction perpendicular to the first direction, and provided on the second substrate is, a counter electrode disposed opposite to the plurality of pixel electrodes, wherein the plurality of a plurality of pixel transistors connected to the pixel electrode, the first supply scanning signals to the plurality of pixels transistors Auxiliary capacitance is formed between the plurality of scanning lines extending in the direction, the plurality of signal lines extending in the second direction for supplying display signals to the plurality of pixel transistors, and the plurality of pixel electrodes. a plurality of auxiliary capacitance extending in the first direction When a plurality of first coordinate detection wires that are stretched in the first direction, and a plurality of second coordinate detection wires that are stretched in the second direction, respectively provided on the second substrate, A plurality of first contact projections and a plurality of second contact projections using the counter electrode as a contact electrode, a plurality of columnar spacers provided on the second substrate, and the plurality of first coordinate detections A plurality of first coordinate detection contact portions which are respectively connected to the wiring and are electrically connected to the plurality of first contact protrusions when the second substrate is pressed from outside; A plurality of second coordinate detection contact portions that are electrically connected to the plurality of second contact protrusions when the second substrate is pressed from the outside, and When the two substrates are not subjected to external pressure, the plurality of first The distance between each of the point protrusions and each of the plurality of first coordinate detection contact parts corresponding to each of the plurality of first contact protrusions, and each of the plurality of second contact protrusions A plurality of base portions that are in contact with the plurality of columnar spacers in order to maintain a distance from each of the plurality of second coordinate detection contact portions corresponding to each of the plurality of second contact protrusions; wherein the one of the plurality of intervals of a second of said plurality of pixel electrodes adjacent in a direction, the plurality of first pixel electrode spacing, connected to each pixel electrode adjacent to the second direction wherein each pixel transistors, said each of the scanning line connected to each pixel transistor, wherein an extending out the signal line extended portion from the signal line, is the arrangement Rutotomoni, and each auxiliary capacitor line, The first coordinate detection detection line; Are not arranged, and each auxiliary capacitance line corresponding to each pixel electrode adjacent in the second direction and the first coordinate detection detection line are arranged in a plurality of second pixel electrode intervals. In addition, the pixel transistors, the scanning lines, and the signal line extending portions are not arranged, and the first coordinate detection detection lines in the plurality of second pixel electrode intervals are The plurality of first coordinate detection contact portions, the plurality of second coordinate detection contact portions, and the plurality of base portions are formed .

According to the present invention, it is possible to increase the aperture ratio, it is possible to provide a filter touch panel can be improved display performance.

FIG. 1 is a schematic configuration diagram showing an embodiment of a touch panel according to the present invention. FIG. 2 is a partial specific plan view of the touch panel according to the present invention. FIG. 3 is a schematic cross-sectional view corresponding to the portion H-H in FIG. 2 showing the X coordinate detection contact portion, the Y coordinate detection contact portion, and the base portion of the touch panel according to the present invention. 4 (A), (B), (C), and (D) are TFTs 2 and bases corresponding to the IVA-IVA part, IVB-IV part, IVC-IVC part, and IVD-IVD part in FIG. FIG. 6 is a schematic cross-sectional view showing the first stage of the production process of the part 11, the X coordinate detection contact part 9, and the Y coordinate detection contact part 10. 5 (A), (B), (C), and (D) are TFTs and bases corresponding to the IVA-IVA portion, IVB-IV portion, IVC-IVC portion, and IVD-IVD portion in FIG. It is a schematic sectional drawing which shows the stage just before an overcoat insulating film is formed in the creation process of a part, an X coordinate detection contact part, and a Y coordinate detection contact part. 6 (A), (B), (C), and (D) are TFTs and bases corresponding to the IVA-IVA portion, IVB-IV portion, IVC-IVC portion, and IVD-IVD portion in FIG. It is a schematic sectional drawing which shows the stage immediately after an overcoat insulating film was formed in the preparation process of a part, an X coordinate detection contact part, and a Y coordinate detection contact part. 7 (A), (B), (C), and (D) are TFTs and bases corresponding to the IVA-IVA portion, IVB-IV portion, IVC-IVC portion, and IVD-IVD portion in FIG. It is a schematic sectional drawing which shows the step before the process of a transparent conductive film in the creation process of a part, an X coordinate detection contact part, and a Y coordinate detection contact part. 8 (A), (B), (C), and (D) are TFTs and bases corresponding to the IVA-IVA portion, IVB-IV portion, IVC-IVC portion, and IVD-IVD portion in FIG. Schematic sectional view showing a stage immediately after the base part is completed after the TFT2, the X coordinate detection contact part, and the Y coordinate detection contact part are completed in the process of creating the TFT, X coordinate detection contact part, and Y coordinate detection contact part It is. FIG. 9 is a specific partially enlarged plan view showing a conventional touch panel. FIG. 10 is a diagram illustrating a comparison between the area of the pixel electrode of the touch panel according to the present invention and the area of the pixel electrode of the conventional touch panel. FIG. 11 is a schematic configuration diagram showing a conventional touch panel.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 1 shows a configuration diagram of a touch panel. The device 200 is a device in which a touch panel function is built in a liquid crystal display device, and is also an image display device. This device 200, the first substrate and (TFT substrate) and a second substrate (color filter substrate) is provided which face each other, a plurality of pixel electrodes 1 are provided over the first substrate of this The counter electrode 20 is provided on the second substrate through a color filter layer. The pixel electrode 1 and the counter electrode 20 are disposed to face each other. A liquid crystal is sealed between each pixel electrode 1 and the counter electrode 20 to form a liquid crystal layer Q.

The plurality of pixel electrodes 1 are each formed in a rectangular shape, and a plurality of pixel electrodes 1 are arranged at regular intervals in the XY direction. Among the pixel electrodes 1, a first pixel electrode interval W1 or a second pixel electrode interval W2 is formed between the pixel electrodes 1 adjacent in the Y direction. The first pixel electrode interval W1 and the second pixel electrode interval W2 are alternately formed in the Y direction.

  In the first pixel electrode interval W1, two TFTs 2 connected to the respective pixel electrodes 1 adjacent to each other with the pixel electrode interval W1 are provided, and two gate wirings 5 connected to these TFTs 2 are wired. Yes.

The second pixel electrode spacing W2, and two storage capacitor line 6, and Y coordinate detection lines 7 are wiring.

  Further, the case where the X coordinate detection contact portion 9 extending from the X coordinate detection wiring 4 is provided in the Y coordinate detection wiring 7 and the case where the Y coordinate detection contact portion 10 is provided in the Y coordinate detection wiring 7. And the base 11 is provided on the Y coordinate detection wiring 7. A storage capacitor 8 is formed for each pixel electrode 1 by the pixel electrode 1 and the storage capacitor wiring 6.

Further, the apparatus 200 includes a data driver (data driver circuit) 21, a scanning driver (scanning drive circuit) 22, an X-coordinate detection unit 23, a Y-coordinate detection unit 25, is provided.

  The data driver 21 supplies an image signal to each data wiring 3.

  The scan driver 22 sends a scan signal to each gate line 5 while scanning in the Y direction at a preset scan timing. This scanning signal sequentially turns on the TFTs 2.

  Here, the timing of the scanning signal output from the scanning driver 22 and the image signal output from the data driver 21 is determined for each gate wiring 5 when the scanning driver 22 sequentially outputs the scanning signal to each gate wiring 5. Each time a scanning signal is output, an image signal is simultaneously output from the data driver 21 to all the data lines 3.

Thus, the scanning signals of the plurality of TFT2 is supplied to the gate electrode by a gate line 5, and the image signal and the TFT2 of the drain electrode and the source electrode supplied to the drain electrode is made conductive by the data lines 3, the continuity The voltage corresponding to the image signal is written to the pixel electrode 1 connected to the source electrode. Then, a voltage difference is generated between the pixel electrode 1 and the counter electrode 20, and the liquid crystal layer Q is driven.

  The X-coordinate detection unit 23 receives an X-coordinate signal generated when the X-coordinate detection contact unit 9 is turned on, for example, in a portion that is pressed by an operator's touch, via the X-coordinate detection wiring 4. The X coordinate of the touch part is detected from the arrangement position of the detection wiring 4.

  The Y-coordinate detection unit 25 receives a Y-coordinate signal generated when the Y-coordinate detection contact unit 10 becomes conductive in the portion that is pressed by the touch via the Y-coordinate detection wiring 7. The Y coordinate of the touched part is detected from the arrangement position of.

  FIG. 2 shows a specific partial plan view of the apparatus 200.

  As described above, in the first inter-pixel electrode W1, two TFTs 2 connected to the adjacent pixel electrodes 1 are formed in the Y direction, and two gate wirings 5 are formed in parallel with each other in the X direction. ing. The data wiring 3 is wired in the Y direction as described above, and is disposed so as to extend in the X direction between the two gate wirings 5 at the intersection with the two gate wirings 5. The extended data wiring (data wiring extension portion) 3 a is commonly connected to the drain electrodes of the two TFTs 2.

The second inter-pixel electrodes W2, as described above, the two storage capacitor line 6, and Y coordinate detection lines 7, it is arranged.

  Further, the case where the X coordinate detection contact portion 9 extending from the X coordinate detection wiring 4 is provided in the Y coordinate detection wiring 7 and the case where the Y coordinate detection contact portion 10 is provided in the Y coordinate detection wiring 7. And the base 11 is provided on the Y coordinate detection wiring 7.

  The base portion 11 sets the contact intervals of the X coordinate detection contact portion 9 and the Y coordinate detection contact portion 10 when not receiving external pressure to a preset contact interval.

  The two auxiliary capacitance lines 6 form adjacent pixel electrodes 1 and auxiliary capacitances 8 and are provided in parallel to each other.

  FIG. 3 is a cross-sectional view corresponding to the HH portion in FIG. 2 corresponding to the X coordinate detection contact portion 9, the Y coordinate detection contact portion 10, and the base portion 11. As shown in FIG.

A TFT 2 is formed on the first substrate (TFT substrate). As will be described later, the TFT 2 includes a gate film made of, for example, aluminum, chromium, or molybdenum, a gate insulating film 100 made of, for example, a silicon nitride film, an intrinsic silicon film made of, for example, intrinsic amorphous silicon, and a channel protection made of, for example, a silicon nitride film. a film, and the n ⁺ silicon film made of, for example, n ⁺ amorphous silicon, for example, a source-drain layer of aluminum or chromium or molybdenum, for example, an overcoat insulating film 101 made of a silicon nitride film, is formed by laminating Yes.

  Each of the X coordinate detection contact portion 9, the Y coordinate detection contact portion 10, and the base portion 11 is formed with each laminated structure 102 that is the same as the laminated structure of the TFT 2 as will be described later.

On the other hand, the second substrate (color filter substrate), a color filter 103, a black matrix 104, a plurality of contact protrusions 105, is provided. These contact projections 105 are provided to face the X coordinate detection contact portion 9, the Y coordinate detection contact portion 10, and the base portion 11, respectively. A counter electrode 20 is provided on the contact protrusions 105, the color filter 103, and the black matrix 104.

  In the X coordinate detection contact portion 9, an X coordinate detection contact electrode 106 is formed on the overcoat insulating film 101 using the same material (for example, ITO) as the pixel electrode, and the X coordinate detection contact electrode 106 is formed in the laminated structure 102. Are connected to the X coordinate detection wiring 4. As a result, the X coordinate detection contact portion 9 generates an X coordinate signal in the X coordinate detection wiring 4 when the counter electrode (contact) 20 and the X coordinate detection contact electrode 106 are electrically connected by receiving external pressure.

  In the Y coordinate detection contact portion 10, a Y coordinate detection contact electrode 107 is formed on the overcoat insulating film 101 using the same material (for example, ITO) as the pixel electrode, and the Y coordinate detection contact electrode 107 is formed in the laminated structure 102. Are connected to the Y coordinate detection wiring 7. As a result, the Y-coordinate detection contact unit 10 generates a Y-coordinate signal in the Y-coordinate detection wiring 7 when the counter electrode (contact) 20 and the Y-coordinate detection contact electrode 107 are electrically connected to each other by receiving external pressure.

  The base portion 11 is formed by forming an electrode 108 on the overcoat insulating film 101 using the same material (for example, ITO) as the pixel electrode, and further forming an insulator height adjusting portion 11a made of, for example, a silicon nitride film. Has been placed. The contact projection 105 serves as a columnar spacer and is in contact with the height adjusting portion 11a. Thus, each contact interval between the X coordinate detection contact portion 9 and the Y coordinate detection contact portion 10 when no external pressure is applied, that is, if the X coordinate detection contact portion 9 is used, the counter electrode (contact) 20 and the X The contact interval K1 between the coordinate detection contact electrode 106 and the contact interval K2 between the counter electrode (contact) 20 and the Y coordinate detection contact electrode 107 in the case of the Y coordinate detection contact unit 10 is set to the same preset contact interval. The

  Next, with reference to FIG. 4 to FIG. 8, a production process common to the TFT 2, the X coordinate detection contact portion 9, the Y coordinate detection contact portion 10 and the base portion 11 on the first substrate will be described in detail.

  4A to 8A, the state in which the TFTs 2 are sequentially formed is shown in cross-sectional views corresponding to the IVA-IVA portion of FIG.

  FIGS. 4 to 8B are cross-sectional views corresponding to the IVB-IVB portion of FIG. 1, showing that the base portion 11 is sequentially formed simultaneously with the creation of the TFT 2 of FIG.

  4 to 8C, a state in which the X coordinate detection contact portion 9 is sequentially formed simultaneously with the creation of the TFT 2 in FIG. 4A is shown in the sectional views corresponding to the IVC-IVC portion in FIG. ing.

  Further, in FIGS. 4 to 8D, a state in which the Y coordinate detection contact portions 10 are sequentially formed simultaneously with the creation of the TFT 2 in FIG. 4A is shown in cross-sectional views corresponding to the IVD-IVD portion in FIG. ing.

  First, as shown in FIGS. 4A to 4D, the gate wiring 5 and the gate wiring 5 are formed on the first substrate by a photolithography method using a gate film made of, for example, aluminum, chromium, or molybdenum. A Y-coordinate detection wiring 7 extending along the line is formed. A portion of the gate wiring 5 corresponding to the TFT 2 provides a gate electrode 5 c for the TFT 2. Further, the portion corresponding to the Y coordinate detection contact portion 10 in the Y coordinate detection wiring 7 provides a connection portion 7 b for the Y coordinate detection contact portion 10.

Next, as illustrated in FIGS. 5A to 5D, a transparent gate insulating film 100 using, for example, a silicon nitride film (SiNx) is formed on the first substrate with the gate wiring 5 and the Y coordinate detection. It is formed so as to cover the wiring 7.

Next, an a-Si layer 52 made of, for example, intrinsic amorphous silicon and an n ⁺ a-Si layer 54 made of, for example, n ⁺ amorphous silicon are stacked with a channel protective film 56 partially using, for example, SiNx interposed therebetween. Is done.

Next, a source / drain film 58 made of, for example, aluminum, chromium, or molybdenum is formed so as to cover the n ⁺ a-Si layer 54. The source / drain film 58 provides the data wiring 3 in the vicinity of the TFT 2 and the X coordinate detection wiring 4 in the vicinity of the X coordinate detection contact portion 9.

  The portion corresponding to the X coordinate detection contact portion 9 in the X coordinate detection wiring 4 provides a connection portion 4 b for the X coordinate detection contact portion 9.

As shown in FIG. 4A, the n ⁺ a-Si layer 54 and the source / drain film 58 are divided into two on the side near the pixel electrode 1 and the side far from the pixel electrode 1.

The laminated combination of the a-Si layer 52, the channel protective film 56, and the n ⁺ a-Si layer 54 divided in this way provides the ohmics layer 24d of the TFT2. Further, the source / drain film 58 divided in two provides the source electrode 24a of the TFT 2 on the side close to the pixel electrode 1, and the drain electrode 24b extending from the data wiring 3 in the TFT 2 on the side far from the pixel electrode 1. doing.

  Next, as shown in FIGS. 6A to 6D, a transparent overcoat insulating film 101 using, for example, a silicon nitride film (SiNx) covering the source / drain film 58 is formed.

  Here, as illustrated in FIG. 6A, the source electrode 24 a is exposed at a position corresponding to the source electrode 24 a of the source / drain film 58 in the portion corresponding to the TFT 2 in the overcoat insulating film 101. Contact hole 101a is formed. The contact hole 101a is also illustrated in FIG.

  Further, as shown in FIG. 6C, the connection portion 4b is exposed at a portion corresponding to the connection portion 4b for the X coordinate detection contact portion 9 of the X coordinate detection wiring 4 in the overcoat insulating film 101. A contact hole 101b is formed. The contact hole 101b is also illustrated in FIG.

  Further, as shown in FIG. 6D, the connection portion 7b is exposed at a portion corresponding to the connection portion 7b for the Y coordinate detection contact portion 10 of the Y coordinate detection wiring 7 in the overcoat insulating film 101. A contact hole 101c is formed. The contact hole 101 c also penetrates the gate insulating film 100 that exists between the overcoat insulating film 101 and the connection portion 7 b for the Y coordinate detection contact portion 10. The contact hole 101c is also illustrated in FIG.

At this stage, in the corresponding portion of the TFT 2 shown in FIG. 6A, the gate electrode 5c by the gate wiring 5, the portion of the gate insulating film 100 overlapping the gate electrode 5c, and the portion of the gate insulating film 100 It overlaps the, a-Si layer 52, the channel protection film 56, and two divided ⁿ + a-Si film 54 O mix layer 24d for semiconductor including two split ⁿ + a Haut mix layer 24d The TFT 2 is provided by the source electrode 24a and the drain electrode 24b on the Si film 54 and the overcoat insulating film 101 that covers the source electrode 24a and the drain electrode 24b.

  Next, as illustrated in FIGS. 7A to 7D, a transparent conductive film 62 made of, for example, ITO is formed so as to cover the overcoat insulating film 101.

  As shown in FIG. 7A, the transparent conductive film 62 is also formed in the contact hole 101a for exposing the source electrode 24a and is electrically connected to the source electrode 24a. The transparent conductive film 62 is also formed in the contact hole 101b for exposing the connection portion 4b for the X coordinate detection contact portion 9, as shown in FIG. And electrically connected. As shown in FIG. 7D, the transparent conductive film 62 is also formed in the contact hole 101c for exposing the connection portion 7b for the Y-coordinate detection contact portion 10 to be connected to the connection portion 7b. And electrically connected.

When the transparent conductive film 62 is formed, a part of the cross section of the TFT 2 illustrated in FIGS. 7A to 7D, a part of the cross section of the base part 11, and a cross section of the X coordinate detection contact part 9. some of, and each of the cross section of a part of Y coordinate detecting contact portion 10, since it is formed simultaneously in common to the above-described creation method for forming TFT2 Therefore on the first substrate, the first substrate The height from above is the same.

  Next, in FIG. 7B showing a part of the cross section of the base portion 11, a transparent base using, for example, a silicon nitride film (SiNx) having a predetermined height on the transparent conductive film 62. A height adjusting portion 11 a is formed by the partial insulating film, and the apex thereof provides a protruding end surface (tip) 311 b of the base portion 11.

  Finally, as shown in FIG. 7A, the transparent conductive film 62 corresponds to the portion corresponding to the TFT 2 and the pixel adjacent to the portion in the contact hole 101 a electrically connected to the source electrode 24 a and the TFT 2. It is deleted except the part which provides the electrode 1.

  Finally, the transparent conductive film 62 is removed except for the portion 108 covered with the height adjusting portion 11a in the corresponding portion of the base portion 11 as shown in FIG. 7B.

  Finally, as shown in FIG. 7C, the transparent conductive film 62 has an X coordinate detection contact electrode 106 at the corresponding portion of the X coordinate detection contact portion 9 and the connection portion 4b of the X coordinate detection wiring 4. The corresponding portion of the X coordinate detection contact portion 9 to be provided and the portion in the contact hole 101b that electrically connects the X coordinate detection contact portion 9 to the connection portion 4b of the X coordinate detection wiring 4 are deleted.

  Finally, the transparent conductive film 62 has the Y coordinate detection contact electrode 107 formed on the corresponding portion of the Y coordinate detection contact portion 10 and the connection portion 7b of the Y coordinate detection wiring 7 as shown in FIG. The corresponding portion of the Y coordinate detection contact portion 10 to be provided and the portion in the contact hole 101c that electrically connects the Y coordinate detection contact portion 10 to the connection portion 7b of the Y coordinate detection wiring 7 are removed.

  Comparison of FIGS. 7A to 7D reveals the following. That is, the height from the first substrate to the protruding end surface (tip) of the X coordinate detection contact portion 9 shown in FIG. 7C and the Y coordinate detection contact portion 10 shown in FIG. The height to the protruding end face (tip) is the same.

  The height from the first substrate to the protruding end face (tip) of the TFT 2 shown in FIG. 7A is the protruding end face (tip) of the X-coordinate detection contact portion 9 shown in FIG. 7C. ) And the height to the protruding end surface (tip) of the Y coordinate detection contact portion 10 shown in FIG. 7D, the transparent conductive film finally removed from the protruding end surface (tip) of the TFT 2. Lower by 62 thickness.

  Further, the height from the first substrate to the protruding end surface (tip) 11b of the base portion 11 is the height to the protruding end surface (tip) of the X coordinate detection contact portion 9 described above shown in FIG. And the protrusion end surface of the height adjustment part 11a finally formed on the transparent conductive film 62 rather than the height to the protrusion end surface (front end) of the Y coordinate detection contact part 10 shown in FIG. (Tip) It is high by the height to 11b.

  On the other hand, FIG. 9 shows a specific partially enlarged plan view of a conventional touch panel. A TFT 2 is disposed between each pixel electrode 1 in the Y direction, and a gate wiring 5, an auxiliary capacitance wiring 6, and a Y coordinate detection wiring 7 are disposed.

  Further, the case where the X coordinate detection contact portion 9 extending from the X coordinate detection wiring 4 is provided in the Y coordinate detection wiring 7 and the case where the Y coordinate detection contact portion 10 is provided in the Y coordinate detection wiring 7. And the base 11 is provided on the Y coordinate detection wiring 7.

  Comparing the present apparatus 200 with the conventional apparatus, the interval La in the Y direction between the first pixel electrodes W1 of the present apparatus 200 is formed to be narrower than the distance Lm between the electrodes M of the conventional apparatus (La <Lm). ). The distance Lb in the Y direction between the second pixel electrodes W2 of the apparatus 200 is also narrower than the distance Lm between the electrodes M of the conventional apparatus (Lb <Lm).

  Accordingly, the length in the Y direction of each pixel electrode 1 of the device 200 can be formed longer than the length in the Y direction of each pixel electrode 1 of the conventional device. Thereby, the area Sa of each pixel electrode 1 of the device 200 can be made larger than the area Sb of each pixel electrode 1 of the conventional device.

  FIG. 10 shows a comparison result between the area Sa of each pixel electrode 1 of the device 200 and the area Sb of each pixel electrode 1 of the conventional device. The length in the X direction of each pixel electrode 1 of the apparatus 200 is the same as the length in the same direction of each pixel electrode 1 of the conventional apparatus, but the length in the Y direction of each pixel electrode 1 is the same as that of the apparatus 200. It is longer than the conventional device. As a result, the area Sa of each pixel electrode 1 of the apparatus 200 is larger than the area Sb of each pixel electrode 1 of the conventional apparatus.

  From FIG. 10, when comparing the present apparatus 200 with the conventional apparatus, the total number of the Y coordinate detection wiring 7, the X coordinate detection contact portion 9, the Y coordinate detection contact section 10, and the base section 11 of the present apparatus 200 is the conventional apparatus. Half of that.

  For example, the odd-numbered pixels remain in the layout of the conventional device, and the even-numbered pixels have the Y coordinate detection wiring 7, the X coordinate detection contact portion 9, the Y coordinate detection contact portion 10, and the base portion 11 from the layout of the conventional device. It is possible to improve the aperture ratio of even-numbered pixels by removing it, but if the even-numbered pixels have a larger aperture ratio than the odd-numbered pixels, all white display will be performed. It becomes a horizontal stripe display every other line. Eventually, in order to obtain the uniformity of all white display, the aperture ratio improved in the even rows is covered with a black mask to match the conventional aperture ratio, and the aperture ratio is not improved by such a method.

  That the total number of Y coordinate detection wires 7 of the apparatus 200 is half that of the conventional apparatus means that the Y coordinate detection accuracy of the apparatus 200 is half that of the conventional apparatus. However, a diagonal 2.5 inch QVGA (240 × 320 pixels) typical for mobile phones and digital cameras and a 5.0 inch diagonal VGA (480 × 640 pixels) typical for electronic dictionaries and industrial equipment. The pitch is 0.159 mm, which is 0.318 mm even if doubled. On the other hand, the typical diameter of the pen tip used for touching is about 0.5 mm, and considering that the diameter is much larger than the pen tip when touching with the fingertip, That the detection accuracy is half that of the conventional device is satisfactory as the detection accuracy of the touch panel.

  As described above, according to the embodiment, two TFTs 2 and two gate lines 5 are formed in the first inter-pixel electrode W1, and two auxiliary capacitance lines are formed in the second inter-pixel electrode W2. 6 and the Y coordinate detection wiring 7, and the X coordinate detection contact portion 9 or the Y coordinate detection contact portion 10 or the base portion 11 is provided in the Y coordinate detection wiring 7. The interval La between W1 and the interval Lb between the second pixel electrodes W2 can be made narrower than the interval between the pixel electrodes of the conventional device. As a result, the aperture ratio of the device 200 can be increased, The display performance of the apparatus 200, for example, image quality such as display brightness, can be improved.

  Further, in the first inter-pixel electrode W1, the data wiring 3 is arranged so as to extend between the two gate wirings 5 at the intersection of the two gate wirings 5, and the extended data wiring extension. Since the wiring layout is such that the output portion 3a is commonly connected to the drain electrodes of the two TFTs 2, the two data wirings 3 are extended between the two gate wirings 5 at the intersections of the two gate wirings 5. Compared with the wiring layout in which one extended data wiring portion is connected to the drain electrode of one TFT 2 and the other extended data wiring portion is connected to the drain electrode of the other TFT 2. Thus, the length in the Y direction between the first pixel electrodes W1 can be shortened, and the aperture ratio can be improved.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  1: pixel electrode, 2: thin film transistor (TFT), 3: data wiring (signal line), 4: X coordinate detection wiring, 5: gate wiring (scanning line), 6: auxiliary capacitance wiring, 7: Y coordinate detection wiring, 8: Auxiliary capacitance, 9: X coordinate detection contact part, 10: Y coordinate detection contact part, 11: Base part, 200: This device, 20: Counter electrode, W1: First pixel electrode interval, W2: Second Pixel electrode spacing, 21: data driver (data drive circuit), 22: scan driver (scan drive circuit), 23: X coordinate detection unit, 25: Y coordinate detection unit, Q: liquid crystal layer.

Claims (8)

A first substrate and a second substrate disposed opposite to each other;
A liquid crystal layer sealed between the first substrate and the second substrate;
A plurality of pixel electrodes provided on the first substrate and arranged in a first direction and a second direction perpendicular to the first direction;
A counter electrode provided on the second substrate and disposed to face the plurality of pixel electrodes;
A plurality of pixel transistors respectively connected to the plurality of pixel electrodes;
A plurality of scanning lines extending in the first direction for supplying a scanning signal to the plurality of pixel transistors;
A plurality of signal lines extending in the second direction for supplying a display signal to the plurality of pixel transistors;
A plurality of storage capacitor lines extending in the first direction to form storage capacitors between the plurality of pixel electrodes;
A plurality of first coordinate detection wires extending in the first direction;
A plurality of second coordinate detection wires extended in the second direction;
A plurality of first contact protrusions and a plurality of second contact protrusions, each provided on the second substrate and having the counter electrode as a contact electrode;
A plurality of columnar spacers provided on the second substrate;
A plurality of first coordinate detection contacts that are respectively connected to the plurality of first coordinate detection wirings and that are electrically connected to the plurality of first contact protrusions when the second substrate receives an external pressure. And
A plurality of second coordinate detection contacts that are respectively connected to the plurality of second coordinate detection wirings and that are electrically connected to the plurality of second contact protrusions when the second substrate is pressed from outside. And
The plurality of first coordinate detections corresponding to each of the plurality of first contact protrusions and each of the plurality of first contact protrusions when the second substrate is not subjected to external pressure. A distance from each of the contact portions, and each of the plurality of second contact protrusions and each of the plurality of second coordinate detection contact portions corresponding to each of the plurality of second contact protrusions. A plurality of base portions that are in contact with the plurality of columnar spacers in order to maintain the spacing;
Equipped with a,
Of a plurality of intervals between the plurality of pixel electrodes adjacent in the second direction,
The plurality of first pixel electrode intervals include the pixel transistors connected to the pixel electrodes adjacent in the second direction, the scan lines connected to the pixel transistors, and the signal. Rutotomoni a signal line extending portion extending from the line, is arranged, wherein each auxiliary capacitance line, wherein the first coordinate detection detection line, are not disposed,
The auxiliary capacitor lines corresponding to the pixel electrodes adjacent in the second direction and the first coordinate detection detection lines are arranged in the plurality of second pixel electrode intervals, The pixel transistor, each scanning line, and the signal line extending portion are not arranged,
The plurality of first coordinate detection contact portions, the plurality of second coordinate detection contact portions, and the plurality of base portions are formed on the first coordinate detection detection lines in the plurality of second pixel electrode intervals. Being
A touch panel characterized by that. In the plurality of first pixel electrode intervals,
One pixel transistor connected to one pixel electrode adjacent in the second direction and one scanning line connected to the one pixel transistor are disposed,
The other pixel transistor connected to the other pixel electrode adjacent in the second direction and the other scanning line connected to the other pixel transistor are disposed,
The signal line extending portion is disposed between the one scanning line and the other scanning line, and the signal line extending portion is commonly connected to the one pixel transistor and the other pixel transistor. Thus, the one pixel transistor and the other pixel transistor are adjacent to each other in the second direction.
The touch panel according to claim 1. In the plurality of second pixel electrode intervals,
The one wherein the storage capacitance line corresponding to a second one of the pixel electrodes of the adjacent direction of the other of the storage capacitor line corresponding to the pixel electrode of the other adjacent to the second direction, is arranged And
The first coordinate detection detection line is disposed between the one auxiliary capacitance line and the other auxiliary capacitance line;
The touch panel according to claim 1 or 2 . The first pixel electrode interval and the second pixel electrode interval are alternately arranged along the second direction.
The touch panel according to any one of claims 1 to 3, wherein the touch panel is provided. The plurality of pixel electrodes include a first pixel electrode column, a second pixel electrode column, a third pixel electrode column, a fourth pixel electrode column, and a fifth pixel array that are continuously arranged in the first direction. Including pixel electrode rows,
The second coordinate detection wiring is disposed between the third pixel electrode row and the fourth pixel electrode row,
The plurality of signal lines include a first signal line, a second signal line, a third signal line, and a fourth signal line,
The first signal line is disposed between the first pixel electrode column and the second pixel electrode column,
The second signal line is disposed between the second pixel electrode column and the third pixel electrode column,
The third signal line is disposed between the second coordinate detection wiring and the fourth pixel electrode column,
The fourth signal line is disposed between the fourth pixel electrode column and the fifth pixel electrode column,
On the first coordinate detection detection line in the plurality of second pixel electrode intervals,
The base is disposed between the first signal line and the second signal line;
The second coordinate detection contact portion is disposed between the second signal line and the third signal line;
The first coordinate detection contact portion is disposed between the third signal line and the fourth signal line;
The touch panel according to any one of claims 1 to 4 , wherein the touch panel is provided. The plurality of first contact protrusions, the plurality of second contact protrusions, and the plurality of columnar spacers are each formed of the same material and are formed at the same height,
The plurality of first coordinate detection contact portions and the plurality of second coordinate detection contact portions are respectively formed at the same height,
The plurality of base portions are formed higher than the plurality of first coordinate detection contact portions and the plurality of second coordinate detection contact portions, respectively.
The touch panel according to claim 1 , wherein the touch panel is provided. The first coordinate detection contact portion and the second coordinate detection contact portion are formed using at least a part of a plurality of materials of the pixel transistor.
The touch panel according to any one of claims 1 to 6, characterized in that. The base portion includes a base portion formed by using at least a part of a plurality of materials of the pixel transistor, and a height adjustment portion formed after the pixel transistor is formed, and is formed by laminating. Being
The touch panel according to any one of claims 1 to 7, characterized in that.

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