Touchscreens and display devices including the same

Abstract

To provide a display device that improves touchscreen performance and enables narrow bezels. [Solution] The display device of the present disclosure comprises a display panel for displaying an image and a touchscreen disposed on the display panel, wherein the touchscreen comprises a first touch routing wiring layer, an insulating layer covering the first touch routing wiring layer, a second touch routing wiring layer disposed on the insulating layer, and a plurality of touch routing wirings including contact holes configured to interconnect the first touch routing wiring layer and the second touch routing wiring layer, wherein the plurality of touch routing wirings include at least two interlayer structural change portions in which the interlayer wiring position of the first touch routing wiring layer and the second touch routing wiring layer changes.

Description

Technical Field

[0001] This specification relates to a touch screen and a display device including the same.

Background Art

[0002] With the development of information technology, the market for display devices, which are the connection media between users and information, has been growing. As a result, the use of display devices such as light emitting display devices (LED), quantum dot display devices (QDD), and liquid crystal display devices (LCD) has been increasing.

[0003] The display devices described above include a display panel including sub-pixels, a driving unit that outputs a driving signal for driving the display panel, and a power supply unit that generates a power supply to be supplied to the display panel or the driving unit.

[0004] In the display device as described above, when a driving signal, such as a scan signal and a data signal, is supplied to the sub-pixels formed on the display panel, the selected sub-pixels can display an image by transmitting light or directly emitting light.

Summary of the Invention

Problems to be Solved by the Invention

[0005] This specification aims to improve the performance of a touch screen (such as reducing noise between touch channels and improving touch sensing sensitivity) through reducing or minimizing resistance deviation (resistance compensation) between wirings, and enabling a narrow bezel in a display device including the touch screen.

[0006] Conventional display devices include wiring that exhibits significant resistance variations between wires due to differences in conductive materials and wire lengths. This resistance variation can cause signal delays and inter-channel noise, potentially degrading touch sensitivity and the overall user experience. Furthermore, this type of imbalance can become particularly pronounced as the number of wiring lines increases and the display size grows. Additionally, conventional wiring line architecture approaches present challenges in achieving narrow bezel areas.

[0007] Therefore, a display device with an improved configuration that can maintain more uniform resistance in the wiring lines, reduce noise, improve touch sensing sensitivity, and achieve a smaller bezel area is desired. [Means for solving the problem]

[0008] One embodiment of the present disclosure provides a display device comprising a display panel for displaying an image and a touchscreen disposed on the display panel, wherein the touchscreen comprises a first touch routing wiring layer, an insulating layer covering the first touch routing wiring layer, a second touch routing wiring layer disposed on the insulating layer, and a plurality of touch routing wirings including contact holes configured to interconnect the first touch routing wiring layer and the second touch routing wiring layer, wherein the plurality of touch routing wirings include at least two interlayer structural change portions in which the interlayer wiring positions of the first touch routing wiring layer and the second touch routing wiring layer change.

[0009] The plurality of touch routing cables may include at least one of a first region containing a first touch routing cable layer located in a lower layer, and a second region containing a second touch routing cable layer located in an upper layer.

[0010] The first region and the second region may be arranged alternately, with at least one wire alternating between them.

[0011] The plurality of touch routing connections may include a third region which includes the first region and the second region.

[0012] The aforementioned multiple touch routing connections may have different numbers of contact holes in two adjacent touch routing connections.

[0013] The two adjacent touch routing connections may have similar or identical wiring resistances.

[0014] The aforementioned multiple touch routing wires may have the same number of contact holes in two adjacent touch routing wires.

[0015] The two adjacent touch routing wires may have similar or identical wiring lengths.

[0016] The plurality of touch routing wires may include wiring extensions that extend in one direction from the contact holes.

[0017] The plurality of touch routing connections include at least one of a first region containing a first touch routing connection layer located in a lower layer and a second region containing a second touch routing connection layer located in an upper layer, and the first region and the second region may be alternated so as to be arranged alternately for at least one connection.

[0018] The wiring extension portion is included in a third region which includes the first region and the second region, and may extend into the first region or the second region.

[0019] In another aspect, the present disclosure may provide a touch screen including a first touch routing wiring layer, an insulating layer covering the first touch routing wiring layer, a second touch routing wiring layer disposed on the insulating layer, and a plurality of touch routing wirings including contact holes configured to interconnect the first touch routing wiring layer and the second touch routing wiring layer, wherein the plurality of touch routing wirings include at least two interlayer structure change portions where the interlayer wiring positions of the first touch routing wiring layer and the second touch routing wiring layer change.

[0020] The number of contact holes included in two adjacent touch routing wirings of the plurality of touch routing wirings may be different.

[0021] The two adjacent touch routing wirings may have similar or identical wiring resistances.

[0022] The number of contact holes included in two adjacent touch routing wirings of the plurality of touch routing wirings may be the same. The two adjacent touch routing wirings may have similar or identical wiring lengths.

Advantages of the Invention

[0023] This specification can improve the performance of the touch screen (such as minimizing noise between touch channels and improving touch sensing sensitivity) through reducing (resistance compensation) or minimizing the resistance deviation between wirings. Also, this specification can enable a narrow bezel when implementing a display device including the touch screen.

Brief Description of the Drawings

[0024] [Figure 1] It is a block diagram schematically showing a light-emitting display device. [Figure 2] It is an example showing a smartphone configured based on the light-emitting display device. [Figure 3]This is an example showing the part corresponding to the touch screen on the smartphone of FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view showing the touch routing wiring connected to the touch electrode. [Figure 5] FIG. is a diagram showing the plan view and the cross section of the touch routing wiring according to the first embodiment. [Figure 6] FIG. is a diagram showing the plan view of the touch routing wiring according to the second embodiment. [Figure 7] FIG. is a diagram showing the cross section of the touch routing wiring according to the third embodiment in a planar form. [Figure 8] FIG. is a diagram showing the cross section of the touch routing wiring of FIG. 7 according to the third embodiment. [Figure 9] FIG. is a diagram showing the cross section of the touch routing wiring of FIG. 7 according to a modified example of the third embodiment. [Figure 10] FIG. is a diagram for explaining the wiring structure of an embodiment with respect to the wiring structure of an embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

[0025] The display device according to this specification can be composed of, but is not limited to, a television, a video player, a personal computer (PC), a home theater, automotive electrical equipment, a smartphone, etc. The display device according to this specification can be composed of a light emitting display device (Light Emitting Display Device: LED), a quantum dot display device (Quantum Dot Display Device; QDD), a liquid crystal display device (Liquid Crystal Display Device: LCD), etc. However, for the sake of convenience of explanation below, a light emitting display device that directly emits light based on an inorganic light emitting diode or an organic light emitting diode is taken as an example.

[0026] FIG. 1 is a block diagram schematically showing a light emitting display device.

[0027] As shown in Figure 1, the light-emitting display device may include a timing control unit 120, a gate drive unit (gate drive circuit) 130, a data drive unit (data drive circuit) 140, a display panel 150, and a power supply unit 180, etc.

[0028] The video supply unit (set or host system) 110 can output various drive signals along with video data signals supplied from an external source or video data signals (data signals) stored in its internal memory. The video supply unit 110 can supply data signals and various drive signals to the timing control unit 120.

[0029] The timing control unit 120 can output a gate timing control signal GDC for controlling the operating timing of the gate drive unit 130, a data timing control signal DDC for controlling the operating timing of the data drive unit 140, and various synchronization signals. The timing control unit 120 can supply the data signal DATA supplied from the video supply unit 110 to the data drive unit 140 along with the data timing control signal DDC. The timing control unit 120 may be formed in the form of an IC (Integrated Circuit) and mounted on a printed circuit board, but is not limited thereto.

[0030] The gate drive unit 130 can output a gate signal (or gate voltage) in response to a gate timing control signal GDC supplied from the timing control unit 120. The gate drive unit 130 can supply gate signals to subpixels included in the display panel 150 via gate wiring GL1 to GLm. The gate drive unit 130 may include a shift register and a level shifter. The level shifter can output a clock signal and a start signal based on signals and voltages output from the timing control unit 120 and the power supply unit 180. The shift register operates based on the clock signal wiring and the start signal, and can output a gate signal via gate wiring GL1 to GLm. The gate drive unit 130 may be formed in IC form or directly on the display panel 150 in a gate-in-panel (Gate In Panel) configuration, but is not limited to these.

[0031] The data drive unit 140 can sample and latch the data signal DATA in response to a data timing control signal DDC or the like supplied from the timing control unit 120, and convert the digital data signal into an analog data voltage based on a gamma reference voltage and output it. The data drive unit 140 can supply the data voltage to the subpixels included in the display panel 150 via data wiring DL1 to DLn. The data drive unit 140 may be formed in the form of an IC and mounted on the display panel 150, or mounted on a printed circuit board, but is not limited to these forms.

[0032] The power supply unit 180 can generate high-potential and low-potential voltages based on an externally supplied external input voltage and output them via the high-potential power supply wiring EVDD and the low-potential power supply wiring EVSS. In addition to high-potential and low-potential voltages, the power supply unit 180 can also generate and output voltages required to drive the gate drive unit 130 (gate high voltage, gate low voltage) and voltages required to drive the data drive unit 140.

[0033] The display panel 150 can display an image in response to a drive signal including a gate signal and a data voltage, and a drive voltage including a high potential voltage and a low potential voltage. The subpixels of the display panel 150 can directly emit light. The display panel 150 may be constructed based on a rigid or ductile substrate such as glass, silicon, or polyimide. In the embodiment, the display panel 150 may be a flexible display or include a flexible substrate. The light-emitting subpixels may include red, green, and blue subpixels, or red, green, blue, and white subpixels.

[0034] For example, a single subpixel SP may be connected to a first data line DL1, a first gate line GL1, a high-potential power supply line EVDD, and a low-potential power supply line EVSS, and may include a pixel circuit consisting of a switching transistor, a drive transistor, a capacitor, an organic light-emitting diode, etc. Because subpixel SPs used in light-emitting devices directly emit light, their circuit configurations are complex. Furthermore, there are various compensation circuits to compensate for the degradation of not only the organic light-emitting diodes themselves, but also components such as the drive transistors that supply the drive current necessary to drive the organic light-emitting diodes. Therefore, it is important to note that subpixel SPs are often simply represented in block form.

[0035] In the above explanation, the timing control unit 120, gate drive unit 130, data drive unit 140, etc., were described as if they were separate components. However, depending on the implementation method of the light-emitting display device, one or more of the timing control unit 120, gate drive unit 130, and data drive unit 140 can be integrated into a single IC.

[0036] Hereinafter, an embodiment according to this specification will be described as an example in which the aforementioned light-emitting display device is configured as a smartphone.

[0037] Figure 2 is an illustrative diagram showing a smartphone realized based on a light-emitting display device, Figure 3 is an illustrative diagram showing the part corresponding to the touchscreen in the smartphone of Figure 2, Figure 4 is a cross-sectional view showing the touch routing wiring connected to the touch electrode in Figure 3, and Figure 5 is a diagram showing the plan view and its cross-section of the touch routing wiring according to the first embodiment.

[0038] As shown in Figures 2 and 3, the light-emitting display device can be implemented in a smartphone 100. The smartphone 100 may include a touchscreen TSP that can receive input from the user USR's finger or a pen.

[0039] The touchscreen TSP may include a substrate (or film) SUB, touch sensing electrodes TSE, touch driving electrodes TRE, bridge electrodes BE, touch driving wiring TRL, touch sensing wiring TSL, touch routing wiring TL, and touchpads TP1, TP2, etc. For example, the touchscreen TSP is a thin, transparent layer or panel (e.g., an invisible or transparent sensor grid) positioned on top of the display panel, and the touchscreen TSP is configured to detect touch positions. In one embodiment, the touchscreen TSP and the display panel 150 are collectively referred to as a touchscreen display device (e.g., an on-cell configuration). In another embodiment, the touch sensors and touch wiring may be integrated within the display panel, such as being embedded in subpixels (e.g., an in-cell configuration).

[0040] Multiple touch sensing electrodes TSE, touch driving electrodes TRE, and bridge electrodes BE may be arranged in a touch sensing region TSA defined on the substrate SUB. Multiple touch driving wires TRL, touch sensing wires TSL, touch routing wires TL, and touchpads TP1 and TP2 may be arranged in a touch non-sensing region NTA defined on the substrate SUB. In one embodiment, the substrate SUB may be understood as one side of a display panel 150. For example, the touch sensing electrodes TSE, touch driving electrodes TRE, and bridge electrodes BE may be arranged on the sealing layer of the display panel 150.

[0041] The touch sensing electrode (TSE) and touch driving electrode (TRE) may have a square, rhombus, or diamond shape, and are shown as an example of being patterned in a mesh-like manner to improve transmission (light transmission) properties, but are not limited to these.

[0042] The touch sensing electrode TSE and the touch driving electrode TRE are located on a touch sensing region TSA defined on the substrate SUB and may be placed on different layers so as to be insulated by an insulating layer. The bridge electrode BE may be located at the intersection of the touch sensing electrode TSE and the touch driving electrode TRE to connect the touch sensing electrode TSE which is physically separated on the touch sensing region TSA.

[0043] The touch driver wiring TRL can be connected to the touch driver electrode TRE.

[0044] The touch drive wiring TRL can transmit the touch drive voltage applied via the first touchpad TP1 to the touch drive electrode TRE. The touch sensing wiring TSL can be connected to the touch sensing electrode TSE. The touch sensing wiring TSL can acquire touch sensing information formed on the touch sensing electrode TSE and transmit it to the second touchpad TP2.

[0045] Touch routing wiring TL may include touch drive wiring TRL and touch sensing wiring TSL as wiring that connects the touch drive electrode TRE and the touch sensing electrode TSE to the first touchpad TP1 and the second touchpad TP2. In other words, touch drive wiring TRL and touch sensing wiring TSL are sometimes referred to as touch routing wiring TL as wiring located in the non-touch sensing area NTA.

[0046] As shown in Figures 3 and 4, the touch routing wiring TL may include a first touch routing wiring layer TL1 and a second touch routing wiring layer TL2, which are located on a touch buffer layer TBUF formed on a substrate SUB, with an insulating layer SILD in between. For example, the first touch routing wiring layer TL1 may be located on the touch buffer layer TBUF, and the second touch routing wiring layer TL2 may be located on the insulating layer SILD covering the first touch routing wiring layer TL1.

[0047] A touch routing wiring TL may include alternating wiring areas where one touch routing wiring layer is arranged above or below each wiring, with alternating inter-layer relationships, and double wiring areas where two touch routing wiring layers are arranged together for each wiring. For this reason, the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2 are arranged so as not to overlap each other in the alternating wiring areas, and so as to overlap each other in the double wiring areas.

[0048] By routing touch routing lines (TL) to include alternating routing areas and dual routing areas, the constraints of devices with limited design area or small space limitations can be overcome, potentially enabling a narrow bezel.

[0049] As shown in Figure 5, the touch routing wiring TL, which includes a first touch routing wiring layer TL1 and a second touch routing wiring layer TL2, is located with an insulating layer SILD in between, but can be electrically connected to each other via contact holes CH that expose the underlying structure. For example, multiple contact holes CH can be used to electrically connect the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2 at multiple locations.

[0050] According to the first embodiment, a touch routing wiring TL located in an alternating wiring region may include an interlayer structure modification section in which the interlayer wiring position of the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2 is changed over at least two sections. Here, the at least two sections may be consecutive sections on the plane or cross-section of the touch routing wiring TL.

[0051] For example, a second touch routing wiring layer TL2 is placed in a first section defined between the first contact hole region CH1A and the second contact hole region CH2A, while in a second section defined between the second contact hole region CH2A and the third contact hole region CH3A, the wiring position changes to become the first touch TL. That is, the touch routing wiring TL may have sections (hereinafter referred to as inter-layer structure change sections) in which the vertical position of the wiring is changed over at least two sections in the form of an upper layer to a lower layer or a lower layer to an upper layer within the alternating wiring region. For example, in order to ensure uniformity of electrical characteristics, the touch routing wiring may include at least two inter-layer structure change sections in which the arrangement of the wiring is swapped. For example, the wiring may have multiple transition sections, for example, transitioning from a double wiring configuration to a region in which the wiring is placed on the upper layer (e.g., above the SILD) and a region in which the wiring is placed on the lower layer (e.g., below the SILD). For example, the first touch wiring layer TL1 and the second touch wiring layer TL2 may contain different materials. Replacing this layer and material may help to equalize the resistance along the touch wiring.

[0052] Thus, when touch routing wiring layers having interlayer structure change sections are arranged within an alternating wiring region, the process conditions (or design conditions) are such that even if a difference in surface resistance occurs between the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, they will have the same resistance (or the same distance). In other words, by swapping the positions of different wiring layers at specific locations, the overall electrical resistance can be made the same or nearly the same, thereby reducing inconsistencies between wirings.

[0053] Furthermore, according to the first embodiment, in order to reduce or minimize resistance deviations between wirings, the position of contact holes CH included in the touch routing wiring TL may vary depending on at least one of the arrangement structure and arrangement area conditions. The position of contact holes CH may differ between the first contact hole area CH1A and the second contact hole area CH2A, and may be the same in the third contact hole area CH3A. In this case, if the wiring resistance of the touch routing wiring TL is the same or similar, the position of the contact holes CH may differ, but the number of contact holes CH may be the same. Here, if the wiring resistance of the touch routing wiring TL is the same or similar, it may mean that the total wiring length of the touch routing wiring TL placed between a first point (start point) connected to the touch pads TP1 and TP2 and a second point (end point) connected to the touch sensing electrode TSE or touch driving electrode TRE included in the touch sensing area TSA is the same or similar.

[0054] For example, the first contact hole region CH1A may be included in a contact region that facilitates an electrical connection between the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, which are located in a non-linear contact area of ​​a double wiring region (a point where a connection is made between upper and lower layers in a region where the wiring bends, or a bend in the wiring). The second contact hole region CH2A may be included in a contact region that facilitates an electrical connection between the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, which are located in a non-linear contact area of ​​an alternating wiring region. The third contact hole region CH3A may be included in a contact region that facilitates an electrical connection between the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, which are located in a linear contact area of ​​an alternating wiring region (for example, a point where a connection can be made between upper and lower layers in a region where the wiring is arranged in a straight line without bending). For example, contact hole regions can be connection points that electrically connect the upper and lower layers of wiring. These connection points may be located in different locations. For example, some connection points may be located in non-linear regions where the wiring bends or curves, while others may be located in linear regions where the wiring runs in a straight line.

[0055] On the other hand, the touch routing wiring structure TL described in Figure 5 can reduce or minimize resistance deviations between wires when routing wiring in the nonlinear section NSA (or sections containing both linear and nonlinear elements, but with more nonlinear sections) shown in Figure 3. Furthermore, reducing or minimizing resistance deviations between wires can improve touchscreen performance (such as minimizing noise between touch channels and improving touch sensing sensitivity).

[0056] Furthermore, Figure 5 illustrates an example of a method for reducing or minimizing resistance deviations between touch routing traces TL when their trace resistances are the same or similar. Therefore, when the trace resistances of touch routing traces TL differ, at least one of the positions of the contact holes CH or the number of contact holes CH may differ in order to compensate for the resistance deviation.

[0057] In addition, for the sake of explanation, this specification has described the structure of touch routing wiring as an example, but this can also be applied to signal wiring and voltage wiring that are routed over long distances on a display panel and can induce resistance deviations, such as data wiring that transmits data voltage and gate wiring that transmits gate voltage.

[0058] Other embodiments will be described below, but the embodiments described below may be based on the first embodiment. That is, the embodiments described below may include inter-layer structure change sections within the alternating wiring area. However, in order to focus on the parts that have been changed or added compared to the first embodiment, the description of the inter-layer structure change sections will be omitted below.

[0059] Figure 6 is a plan view of the touch routing wiring according to the second embodiment.

[0060] On the other hand, Figure 6 shows the touch routing wiring in a planar view, and also shows some sections together to help understand the wiring structure of the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, which are located on different layers.

[0061] As shown in Figure 6, according to the second embodiment, the touch routing wiring TL may include wiring extensions TL2E1 and TL2E2 extending in either direction from the first contact holes CH1a and CH1b in order to reduce or minimize resistance deviations between the wirings. That is, by shortening or lengthening the lengths of the wiring extensions TL2E1 and TL2E2, the resistances of different wirings can be appropriately adjusted so that all wirings have substantially the same resistance even on curved surfaces (e.g., the rounded corners of a bezel).

[0062] The wiring extensions TL2E1 and TL2E2 may be included in the double wiring area. The wiring extensions TL2E1 and TL2E2 may also extend from the first contact holes CH1a and CH1b located in the double wiring area that sandwiches the alternating wiring area in the touch routing wiring TL. The wiring extensions TL2E1 and TL2E2 may be arranged alternately so as not to overlap with the wiring extensions of adjacent touch routing wiring in a plan view. For example, the wire extensions may be offset so as not to overlap with the wiring extensions of adjacent wiring (for example, not to be placed immediately next to the wiring extension of adjacent wiring).

[0063] For example, the first-first wiring extension TL2E1 is positioned to start from the first-first contact hole CH1a of the touch routing wiring TL included in the one-sided dual wiring area and extend toward the alternating wiring area. The first-second wiring extension TL2E2 is positioned to start from the first-second contact hole CH1b of the touch routing wiring TL included in the other-sided dual wiring area and extend toward the alternating wiring area.

[0064] The first-first wiring extension TL2E1 and the first-second wiring extension TL2E2 may extend to the same length or to different lengths depending on the positions of the first-first contact hole CH1a and the first-second contact hole CH1b, in order to reduce or minimize the resistance deviation between the wirings.

[0065] According to the second embodiment, the alternating routing region and the double routing region include a first touch routing layer TL1 and a second touch routing layer TL2, where the thickness of the second touch routing layer may be greater than the thickness of the first touch routing layer TL1 (or vice versa).

[0066] As an example, a second touch routing layer TL2, which has a greater thickness than the first touch routing layer TL1, may be included in the alternating routing region. Since the second touch routing layer TL2 is located above the first touch routing layer TL1, it has the advantage of being able to be formed with a greater thickness than the first touch routing layer TL1, taking into account the generation of resistance deviations.

[0067] Furthermore, if the sheet resistance differs due to the difference in thickness between the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, the position of at least one of the first contact holes CH1a, CH1b and the second contact holes CH2a, CH2b may be changed in order to reduce or minimize the resistance deviation between the wirings.

[0068] On the other hand, Figure 6 illustrates, as an example, that the wiring extensions TL2E1 and TL2E2 are located only in the touch routing wiring TL, which includes the first contact holes CH1a and CH1b. Furthermore, Figure 6 illustrates, as an example, that the first contact holes CH1a and CH1b, which include the wiring extensions TL2E1 and TL2E2, are located only in the inclined portion (shaded portion) of the touch routing wiring TL. However, this is merely an example, and may vary depending on the position, structure, and shape of the wiring, for which refer to the third embodiment described below.

[0069] Figure 7 is a plan view of the cross-section of the touch routing wiring according to the third embodiment, Figure 8 is a view of the cross-section of the touch routing wiring in Figure 7 according to the third embodiment, and Figure 9 is a view of the cross-section of the touch routing wiring in Figure 7 according to a modified example of the third embodiment.

[0070] On the other hand, Figure 7 shows the touch routing wiring in cross-section, and it should be noted that the insulating layer has been removed to aid in understanding the wiring structure and contact structure of the first touch routing wiring layer TL1 and the second touch routing wiring layer TL2, which are located in different layers.

[0071] As shown in Figures 7 and 8, according to the third embodiment, the touch routing wiring TL may include wiring extensions TL1E and TL2E to reduce or minimize resistance deviations between wirings. The wiring extensions TL1E and TL2E may extend from the contact holes included in the touch routing wiring TL, as described in the second embodiment. For example, each wiring extension may also be referred to as an "overhang" that protrudes from the corresponding contact hole and extends a certain distance. Furthermore, the wiring extensions TL1E and TL2E may be included in a dual wiring region and extend toward an alternating wiring region, as described in the second embodiment.

[0072] According to the third embodiment, the wiring extensions TL1E and TL2E may include mutually adjacent touch routings such as the first-second touch routing TLb, the first-third touch routing TLc, and the first-fourth touch routing TLd, excluding the first-first touch routing TLa.

[0073] Furthermore, according to the third embodiment, the wiring extensions TL1E and TL2E are included not only in the first touch routing wiring layer TL1 but also in the second touch routing wiring layer TL2, similar to the first layer wiring extension TL1E and the second layer wiring extension TL2E.

[0074] Furthermore, according to the third embodiment, if the wiring resistance of the touch routing wiring TL is the same or similar, the positions of the contact holes may differ, such as the first contact hole CH1 to the fifth contact hole CH5, but the number of contact holes may be the same. In this case, the contact holes may be included in the same wiring area and in the same number as the first and second contact holes CH1, CH2 included in the one-sided dual wiring area, or the fourth and fifth contact holes CH4, CH5 included in the other-sided dual wiring area.

[0075] On the other hand, according to a modified example of the third embodiment in Figure 9, if the wiring resistance of the touch routing wiring TL is different, the number of contact holes in the first-1 touch routing wiring TLa, such as the first contact hole CH1 to the sixth contact hole CH6, may differ from that of the remaining touch routing wirings TLb to TLd in order to compensate for the resistance deviation.

[0076] For example, the first-to-first touch routing wire TLa may have at least one more contact hole than the remaining touch routing wires TLb to TLd to compensate for resistance deviations. Conversely, the first-to-first touch routing wire TLa may have at least one more contact hole than the remaining touch routing wires TLb to TLd to compensate for resistance deviations. In other words, the number of contact holes may be determined by the relationship between the touch routing wire that may cause resistance deviations and the touch routing wires arranged around it.

[0077] In the third embodiment and its modifications, the wiring extensions TL1E and TL2E can be formed so that the wiring is not interrupted when the position of the wiring is changed via the contact holes, and the wiring can be designed in the same form, thereby reducing the capacitance deviation caused by the formation of the contact holes.

[0078] Figure 10 is a diagram illustrating the wiring structure of an embodiment compared to the wiring structure of an experimental example.

[0079] Figure 10 is based on the wiring structure of the first embodiment shown in Figure 5 and the wiring structure of the experimental example. The wiring structure of the experimental example, like the wiring structure of the first embodiment, has touch routing wiring including a double wiring area and an alternating wiring area, but the alternating wiring area does not include an interlayer structure change section.

[0080] As shown in Figure 10, in the experimental example, the resistance changes abruptly depending on the wiring position, but in the first embodiment, the resistance may increase slightly when the wiring position changes, but it may not change abruptly and irregularly as in the experimental example. Therefore, by forming a wiring structure based on the first embodiment, or by adding a structure similar to the second and / or third embodiments, the factors causing resistance deviations between wirings can be further reduced or minimized. In short, in the relevant example, a problem arises in which the resistance value changes abruptly depending on the position on the wiring (e.g., "zigzag" type resistance). On the other hand, the resistance value in this embodiment increases only slightly as the position on the wiring changes, and can change smoothly along a linear pattern. This effectively minimizes the deviation of resistance values ​​between wirings, and an improvement in the accuracy of touch sensing can be expected.

[0081] As described above, embodiments of this disclosure can improve the performance of a touchscreen (such as reducing noise sources between touch channels and improving touch sensing sensitivity) by reducing or minimizing resistance deviations between wiring (resistance compensation). Furthermore, embodiments of this disclosure can enable a narrow bezel when mounting a display device including a touchscreen. [Explanation of symbols]

[0082] TSP Touchscreen TL Touch Routing Wiring TL1 First Touch Routing Layer TL2 Second Touch Routing Layer TBUF (Touch Buffer Layer) SILD insulating layer CH Contact Hole TL2E1, TL2E2 wiring extension

Claims

1. A display panel that displays images, The system includes a touchscreen positioned on the aforementioned display panel, The aforementioned touchscreen is The first touch routing wiring layer, An insulating layer covering the first touch routing wiring layer, A second touch routing wiring layer is disposed on the insulating layer, The system comprises a plurality of touch routing wires, including contact holes configured to interconnect the first touch routing wiring layer and the second touch routing wiring layer, A display device in which the plurality of touch routing wirings include at least two interlayer structural change sections in which the interlayer wiring positions of the first touch routing wiring layer and the second touch routing wiring layer change.

2. The aforementioned multiple touch routing wires are A first region including one first touch routing wiring layer positioned as the underlying layer, or The display device according to claim 1, comprising at least one second region including a second touch routing wiring layer arranged as an upper layer.

3. The display device according to claim 2, wherein the first region and the second region are alternately arranged with respect to at least one of the plurality of touch routing wires.

4. The display device according to claim 3, wherein the plurality of touch routing wires comprises a third region including the first region and the second region.

5. The display device according to claim 1, wherein two adjacent touch routing wires among the plurality of touch routing wires have different numbers of contact holes.

6. The display device according to claim 5, wherein the wiring resistances of the two adjacent touch routing wires are equal or substantially equal.

7. The display device according to claim 1, wherein two adjacent touch routing wires among the plurality of touch routing wires have the same number of contact holes.

8. The display device according to claim 7, wherein the wiring lengths of the two adjacent touch routing wires are equal or substantially equal.

9. The display device according to claim 1, wherein the plurality of touch routing wires include wiring extensions that extend away from the contact holes in a direction away from the double wiring area.

10. The plurality of touch routing lines include at least one of a first region containing one first touch routing line layer as a lower layer, or a second region containing one second touch routing line layer as an upper layer. The display device according to claim 9, wherein the first region and the second region are alternately arranged for at least one of the plurality of touch routing wires.

11. The display device according to claim 10, wherein the wiring extension portion is located within a third region including the first region and the second region, and extends to the first region or the second region.

12. The first touch routing wiring layer, An insulating layer covering the first touch routing wiring layer, A second touch routing wiring layer is disposed on the insulating layer, The system comprises a plurality of touch routing wires, including contact holes configured to interconnect the first touch routing wiring layer and the second touch routing wiring layer, A touchscreen in which the plurality of touch routing wirings include at least two interlayer structural change sections in which the interlayer wiring positions of the first touch routing wiring layer and the second touch routing wiring layer change.

13. The touchscreen according to claim 12, wherein two adjacent touch routing wires among the plurality of touch routing wires have a different number of contact holes from each other.

14. The touchscreen according to claim 13, wherein the wiring resistances of the two adjacent touch routing wires are equal or substantially equal.

15. The touchscreen according to claim 12, wherein two adjacent touch routing wires among the plurality of touch routing wires have the same number of contact holes.

16. The touchscreen according to claim 15, wherein the wiring lengths of the two adjacent touch routing wires are equal or substantially equal.

17. Multiple subpixels that display the image, Multiple touch electrodes for detecting touch, Displaced in the bezel region outside the plurality of subpixels, the first touch routing wiring includes a first-first touch routing wiring layer and a first-second touch routing wiring layer, In the bezel region, a second touch routing wiring is arranged adjacent to the first touch routing wiring and includes a second-first touch routing wiring layer and a second-second touch routing wiring layer, The device comprises an insulating layer extending between the first-1 touch routing wiring layer and the first-2 touch routing wiring layer, and extending between the second-1 touch routing wiring layer and the second-2 touch routing wiring layer, The aforementioned bezel area is A double wiring region including the first-1 touch routing wiring layer overlapping the first-2 touch routing wiring layer and the second-1 touch routing wiring layer overlapping the second-2 touch routing wiring layer, The alternating wiring region includes a first-first segment of the first touch routing wiring having a portion of the first-second touch routing wiring layer that does not overlap with the first-first touch routing wiring layer, and a first-second segment of the first touch routing wiring that includes a portion of the first-first touch routing wiring layer that does not overlap with the first-second touch routing wiring layer, A display device in which the first-1 segment transitions to the first-2 segment.

18. The aforementioned alternating wiring region is A second-first segment of the second touch routing wiring having a portion of the second-first touch routing wiring that does not overlap with the second-second touch routing wiring layer, The second-second segment of the second touch routing wiring includes a portion of the second-second touch routing wiring layer that does not overlap with the second-first touch routing wiring layer, The display device according to claim 17, wherein the 2-1 segment transitions to the 2-2 segment of the second touch routing wiring.

19. The 1-1 segment of the first touch routing wiring having the portion of the 1-2 touch routing wiring layer is adjacent to the 2-1 segment of the second touch routing wiring having the portion of the 2-1 touch routing wiring, The display device according to claim 18, wherein the insulating layer is located between the portion of the first-to-second touch routing wiring layer and the portion of the second-to-first touch routing wiring layer.

20. The first touch routing wiring includes a plurality of first contact holes extending through the insulating layer to which the first-1 touch routing wiring layer is electrically connected to the first-2 touch routing wiring layer. The display device according to claim 17, wherein the second touch routing wiring includes a plurality of second contact holes extending through the insulating layer that is electrically connected to the second-2 touch routing wiring layer.

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