Display panel and method of manufacturing the same

Abstract

A display panel and a manufacturing method thereof are proposed. The display panel may include: a touch electrode provided to supply a common voltage through the electrode; a first signal line connected to the touch electrode and provided to supply the common voltage applied by a driving IC to the touch electrode; a plurality of dummy lines provided to be connected to the touch electrode; and a switching transistor provided to supply the common voltage to a second signal line by switching by an applied VCOM enable signal, wherein the second signal line is configured to supply the common voltage to the touch electrode.

Description

Technical Field

[0001] The present disclosure relates to a display panel and a method for manufacturing the same. Background Art

[0002] Recently, the application fields of display devices have expanded not only to electronic devices such as mobile phones, TVs, and monitors, but also to home appliances such as refrigerators. Types of display devices include liquid crystal displays (LCDs), organic light emitting diode (OLED) displays, and the like.

[0003] In recent years, a touch screen for directly inputting information on a screen by a touch of a finger or a pen has been applied by replacing an input device such as a mouse or a keyboard that has been applied in the prior art. Due to the advantage of easy operation, the application of the touch screen has been expanded.

[0004] According to the structure, the touch screen can be divided into an embedded method integrated in the unit of the touch panel, a cover surface method formed on the upper part of the touch panel, and an external method in which the touch screen is separately coupled to the upper part of the display device. The embedded method, which has the advantages of beauty and slimness, has attracted attention.

[0005] Due to the structural properties that a plurality of touch blocks capable of sensing a user's touch are inserted into the display panel and pixels for display and touch blocks for touch sensing are arranged together, the embedded method drives display and touch sensing in a time-division manner. For example, a touch electrode as a component of a touch block is used as a touch electrode at a touch sensing time or as a common electrode at a display time in a time-division manner.

[0006] In the display time, since the touch electrode is used as a common electrode, an electrode line for supplying a common voltage to the touch electrode is required. Since the voltage supply channel of the driving chip (e.g., data driver IC) supplying the common voltage has limitations, a common voltage electrode line is usually set for each touch block. The touch block is set so that a given common voltage electrode line is connected to the touch electrode, and the common voltage propagates in the touch electrode.

[0007] The material constituting the touch electrode (e.g., ITO) has a higher resistance than metal. In the process where the common voltage is applied to some areas of the touch electrode and propagates to the remaining areas, a resistance difference occurs depending on the area on the touch electrode, so there is a problem that the common voltage is not uniformly applied to the touch electrode and voltage imbalance occurs. As a result, when outputting video, there may be a problem of uneven brightness. Summary of the invention

[0008] Accordingly, embodiments of the present disclosure are directed to a display panel and a method of manufacturing the same that substantially obviate one or more problems due to limitations and disadvantages of the related art.

[0009] In order to solve the common voltage imbalance phenomenon occurring in touch electrodes, various exemplary embodiments provide a display panel having a plurality of signal lines supplying a common voltage to touch electrodes and a method of manufacturing the same.

[0010] Additional features and aspects will be described in the following description, and some features will become apparent from the description, or can be learned by practicing the inventive concepts provided herein. Other features and aspects of the inventive concepts can be realized and obtained by structures specifically pointed out in the written description or derived therefrom, its claims and the accompanying drawings.

[0011] To achieve these and other aspects of the inventive concepts embodied and broadly described, a display panel includes: a touch electrode configured to supply a common voltage; a first signal line connected to the touch electrode and configured to supply the common voltage applied by a driving IC to the touch electrode; a plurality of dummy lines configured to be connected to the touch electrode; and a switching transistor configured to supply the common voltage to a second signal line by being switched by an applied VCOM enable signal, wherein the second signal line is configured to supply the common voltage to the touch electrode.

[0012] On the other hand, a method for manufacturing a display panel includes the following steps: setting a touch electrode, which is configured to supply a common voltage through the electrode; setting a first signal line, which is connected to the touch electrode and is configured to supply the common voltage applied by a driving IC to the touch electrode; setting a plurality of dummy lines, which are configured to be connected to the touch electrode; and setting a switching transistor, which is configured to supply the common voltage to a second signal line by switching by an applied VCOM enable signal, wherein the second signal line is configured to supply the common voltage to the touch electrode.

[0013] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the inventive concepts as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated into and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present disclosure and together with the description are used to explain the principles of the present disclosure. In the drawings:

[0015] Figure 1 is a diagram illustrating a display panel according to an exemplary embodiment.

[0016] Figure 2 is a diagram illustrating a touch electrode according to an exemplary embodiment.

[0017] Figure 3 It is along Figure 2 A cross-sectional view taken along line II'.

[0018] Figure 4 is a diagram illustrating a driving circuit of a display panel according to an exemplary embodiment.

[0019] Figure 5 is a diagram illustrating a touch electrode according to an exemplary embodiment.

[0020] Figure 6 It is along Figure 5 A cross-sectional view taken along line II-II'.

[0021] Figure 7 is a circuit diagram during an automatic probing (AP) array inspection of a display panel according to an exemplary embodiment.

[0022] Figure 8 is a diagram illustrating a touch electrode according to an exemplary embodiment.

[0023] Fig. 9 is a flowchart illustrating a method of manufacturing a display panel according to an exemplary embodiment.

[0024] Fig.10 is a flowchart illustrating a method of manufacturing a display panel according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Hereinafter, various exemplary embodiments will be described with reference to the accompanying drawings. In this specification, when a first component (or region, layer, part, etc.) is referred to as being "on", "connected to" or "coupled to" a second component, it means that the first component may be directly connected to / coupled to the second component, or a third component may be disposed between the first and second components. The same reference numerals refer to the same components. In addition, in the accompanying drawings, the thickness, proportion and size of the components are exaggerated for the effective description of the technical content. "And / or" includes all combinations of one or more of the configurations that can define the association.

[0026] Although the terms "first", "second", etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of various exemplary embodiments, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. As used herein, unless the context clearly indicates otherwise, the singular form is intended to also include the plural form.

[0027] Terms such as “below”, “on the lower side”, “above”, “on the upper side”, etc. are used to describe the relationship between components shown in the drawings. These terms are relative concepts and are explained based on the directions indicated in the drawings.

[0028] It will also be understood that the terms “includes,” “comprising,” “having,” etc. specify the presence of stated features, integers, steps, operations, elements, components, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0029] In addition, hereinafter, the touch block mainly refers to a unit sensor or an area of ​​a unit sensor that senses touch input, and the touch electrode mainly refers to a layer in the touch block to which a common electrode is applied at the display time, but the touch electrode may be referred to as an area of ​​the touch block, and in this case, those skilled in the art can clearly understand its meaning according to the context.

[0030] Figure 1 2 is a diagram showing a display panel according to an exemplary embodiment. The display panel 200 is a panel capable of outputting an image according to an input digital signal. For example, the display panel 200 may be a liquid crystal panel (LCD). The display panel 200 may be a component of a TV, a monitor, or a mobile phone.

[0031] The display panel 200 may include a display area 210 and a non-display area 220. In the display area 210, a plurality of pixels are arranged, and in the non-display area 220, circuits and elements for performing auxiliary functions or supplying signals to the display area 210 may be provided.

[0032] A plurality of touch electrodes 215 may be arranged in the display area 210. A single touch electrode 215 includes a plurality of pixels to provide a touch block. In the case of an in-cell touch screen, a block is provided by inserting a touch electrode 215 for touch sensing into a multilayer structure of a display panel. The touch electrode 215 is driven in a time-division manner and is used as an electrode for driving a pixel in a display period or as a touch sensor in a touch period.

[0033] Figure 2 is a diagram illustrating a touch electrode according to an exemplary embodiment. Figure 3 It is along Figure 2 A cross-sectional view taken along line II'.

[0034] The touch electrode 300 is a component for sensing a user's touch input. The touch electrode 300 may be provided with a touch drive signal in a touch period to sense the position of the user's touch. The touch electrode 300 may be connected to a driver IC through a signal line 310. Here, the driver IC includes a touch driver IC, and may include at least one of a data driver IC, a gate driver IC, and a timing controller to constitute a single IC.

[0035] In the display period, an image can be displayed by supplying a common voltage to the touch electrode 300. That is, in the display period, the touch electrode 300 can be used as a common electrode for driving a pixel. Hereinafter, the description will mainly focus on the configuration of supplying a common voltage to the touch electrode in the display period.

[0036] In order to provide the common voltage to the touch electrode 300, a signal line 310 providing the common voltage from the driving IC is required. The dummy line 320 may be provided at the lower portion of the touch electrode 300. The dummy line 320 may correspond to the signal line 310, but may not be connected to the driving IC. The dummy line 320 allows the light transmission area of ​​the panel to be formed in the same pattern on the panel. Therefore, the image quality output by the panel can be improved.

[0037] When a common voltage is provided to the touch electrode through the signal line 310, it is difficult to input the common voltage through multiple lines due to the limitation of the channel of the driving IC. Therefore, the common voltage can be applied to each touch electrode 300 through a single signal line 310. The touch electrode 300 can be divided into an electrode area 301 as an upper part of the signal line 310 and a dummy area 302 as an upper part of the dummy line 320.

[0038] In the touch electrode 300, a common voltage is directly applied to the electrode region 301 from the signal line 310, and the common voltage is transmitted to the dummy region 302 through the touch electrode 300. The common voltage may be transmitted to be supplied as a whole on the touch electrode 300 composed of a conductive layer such as ITO. Here, the common voltage may also be transmitted to the dummy region 302, and the common voltage may also be provided on the dummy line 320 of the dummy region 302 through the contact hole 330. Here, the contact hole 330 refers to a hole or an electrode disposed in the hole, which is formed to provide an electrical connection between the signal line 310 or the dummy line 320 and the touch electrode 300 spaced apart by the insulating layer 350.

[0039] However, in the electrode area 301 to which the common voltage is directly applied through the signal line 310 and in the dummy area 302 to which the common voltage is transmitted through the touch electrode 300, a difference occurs in the common voltage applied to the touch electrode 300. This difference may be caused by the resistance of the touch electrode 300, the contact hole 330, and the dummy line 320 including ITO, etc. As a result, the common voltage is not uniformly provided throughout the touch electrode 300. Therefore, brightness imbalance may occur between multiple pixels in the touch block. The electrode area 301 becomes brighter or darker than the dummy area 302, so a brightness difference occurs on the display and vertical white lines may also appear.

[0040] Hereinafter, according to various exemplary embodiments, a display panel including a plurality of signal lines in order to solve brightness imbalance will be described in detail.

[0041] Figure 4 is a diagram illustrating a driving circuit of a display panel according to an exemplary embodiment. Figure 5 is a diagram illustrating a touch electrode according to an exemplary embodiment. Figure 6 It is along Figure 5 A cross-sectional view taken along line II-II'.

[0042] Reference Figures 4 to 6 , the display panel in the exemplary embodiment may include a plurality of signal lines for applying a common voltage to a single touch electrode 400. A first signal line 410 and a second signal line 420 may be included as a plurality of signal lines for providing a common voltage to the touch electrode 400. The first signal line 410 and the second signal line 420 may be connected to the touch electrode 400 through a contact hole 430. The contact hole 430 refers to a hole or an electrode disposed in the hole, which is formed to provide an electrical connection between the first signal line 410 or the second signal line 420 and the touch electrode 400 spaced apart by the insulating layer 450.

[0043] The second signal line 420 may be connected to the switching transistor 550 through the signal switch to supply a common voltage. The common voltage is applied from the switching transistor 550 to the second signal line 420 , and the applied common voltage may be applied to the touch electrode 400 .

[0044] The gate of the switching transistor 550 is connected to the VCOM enable line 530 so that the switching transistor 550 can be turned on according to the VCOM enable signal applied to the VCOM enable line 530. The VCOM enable signal can be provided by a drive IC (D-IC). The source of the switching transistor 550 is connected to the VCOM line 540, and when the switching transistor 550 is turned on, the common voltage can be applied from the VCOM line 540 to the second signal line 420. Therefore, the common voltage can be applied to the touch electrode from the first signal line 410 and the second signal line 420.

[0045] In various exemplary embodiments of the present disclosure, multiple lines providing a common voltage may be configured to solve the conventional problem that the common voltage is not uniformly supplied. Since the common voltage does not propagate in one direction from the first signal line but is transmitted in various directions, the common voltage imbalance in the touch electrode may be alleviated.

[0046] In exemplary embodiments, the second signal line 420 may be at least one of the plurality of dummy lines 425 .

[0047] Here, the dummy line 425 is prepared to improve the image quality in the touch block. A plurality of pixels may be provided in the touch block. When outputting an image, due to the pattern difference in the light transmission area, the pixels in the area where the first signal line 410 is provided and the pixels in the area where the first signal line 410 is not provided may have a difference in image quality. In order to solve the problem of image quality difference, the dummy line 425 is provided in the same manner as the first signal line 410, whereby the light transmission area may be formed in the same pattern for the pixels in the touch block to improve the output image quality. Some or all of the dummy lines 425 may not be connected to the driver IC.

[0048] In the display panel according to the exemplary embodiment, the plurality of dummy lines 425 may be disposed in parallel with the first signal line 410. In this case, the touch electrode may include an electrode region 401 as an upper portion of the first signal line 410 and a dummy region 402 as a region outside the electrode region 401. Here, the second signal line 420 may be disposed in the dummy region 402.

[0049] When the touch electrode 400 is divided into the electrode region 401 and the dummy region 402, the portion where the brightness imbalance occurs is the portion close to the electrode region 401 (the region contacted by the first signal line 410). The brightness imbalance occurs due to the difference in common voltage between the electrode region 401 directly supplied with the common voltage and the dummy region 402 supplied with the common voltage through the touch electrode 400. Therefore, when the second signal line 420 is provided in the dummy region and the common voltage is supplied through the second signal line 420, the common voltage is uniformly supplied to the touch electrode 400 to improve the brightness imbalance caused by the change in the common voltage.

[0050] In addition, the second signal line 420 is arranged in one of the regions where the touch electrode 400 is divided into two parts to be parallel to the first signal line 410, and the first signal line 410 may be arranged in the other region of the region divided into two parts. In order to uniformly provide a common voltage on the touch electrode 400, the signal lines may be respectively arranged in each region where the touch electrode 400 is divided into two parts. Preferably, the first signal line 410 and the second signal line 420 are parallel, and the touch electrode 400 may be divided into two parts to be parallel to the first signal line 410 and the second signal line 420. In the arrangement of the first signal line 410, the dummy line 425 and the second signal line 420, various arrangements other than the exemplary embodiment are possible, and the arrangement is not limited to the exemplary embodiment.

[0051] The display panel according to the exemplary embodiment includes: a touch electrode 400 configured to supply a common voltage through the electrode; a first signal line 410 connected to the touch electrode 400 and configured to supply the common voltage applied by the driving IC to the touch electrode 400; a plurality of dummy lines 425 configured to be connected to the touch electrode 400; and a switching transistor 550 configured to supply the common voltage to the second signal line 420 by switching by an applied VCOM enable signal, wherein the second signal line 420 may provide the common voltage to the touch electrode 400. The second signal line 420 may include at least one of the plurality of dummy lines 425.

[0052] In an exemplary embodiment, the touch electrode 400 may provide a common voltage to the display panel at display time. Taking an LCD panel as an example, the arrangement of liquid crystals is adjusted according to the electric field provided by the data voltage supplied to the pixel electrode and the common voltage supplied to the common electrode, and the transmittance of light emitted from the backlight unit is controlled by adjusting the arrangement of the liquid crystals to display an image. A certain number of pixels constitute a touch block, and the touch screen is provided with a plurality of touch blocks. At this time, the common electrodes of the pixels constituting a single touch block may be connected to each other to set the touch electrode 400.

[0053] In an exemplary embodiment, the first signal line 410 may be connected to the touch electrode 400. The first signal line 410 may provide the touch electrode 400 with a common voltage applied by the driving IC D-IC.

[0054] In an exemplary embodiment, the driving IC D-IC may provide a common voltage to the first signal line 410. The driving IC includes a touch driving IC and may be composed of a single IC including at least one of a data driving IC, a gate driving IC, and a timing controller. The driving IC D-IC may be controlled by the timing controller. The driving IC D-IC may provide a VCOM enable signal and / or a common voltage to the switching transistor 550. The switching transistor 550 may supply a common voltage to the second signal line 420 by switching by a VCOM enable signal applied from the driving IC D-IC. The driving IC D-IC may provide a common voltage to the touch electrode 400 through a plurality of signal lines including the first signal line 410.

[0055] In an exemplary embodiment, the display panel may include a plurality of dummy lines 425. The dummy lines 425 are as described above. In an exemplary embodiment, one of the plurality of dummy lines is used as the second signal line 420, whereby a process for generating an additional electrode and a contact hole may not be required. Therefore, according to an exemplary embodiment, while adding the second signal line 420, addition or change of a process may be minimized.

[0056] In an exemplary embodiment, the second signal line 420 is connected to the touch electrode 400, and the second signal line 420 may be made of a conductive material. The second signal line 420 may provide the applied common voltage to the touch electrode 400. In an exemplary embodiment, the second signal line 420 may be at least one of the plurality of dummy lines 425. A plurality of second signal lines 420 may be configured. The second signal line 420 may be configured at various positions, as described above.

[0057] In an exemplary embodiment, the display panel may include a switching transistor 550. In an exemplary embodiment, the switching transistor 550 may supply a common voltage to the second signal line 420 by being switched by an applied VCOM enable signal. Here, the applied VCOM enable signal and the common voltage may be applied from a driving IC D-IC, or according to another exemplary embodiment, the applied VCOM enable signal and the common voltage may be applied from an automatic detection unit (APU) for inspecting an array of the display panel.

[0058] In more detail, the gate of the switching transistor 550 and the driving IC D-IC may be connected to each other so that the VCOM enable signal is applied from the driving IC D-IC. In addition, in order for the common voltage supplied to the second signal line 420 by the switching transistor 550 to be applied from the driving IC D-IC, the source of the switching transistor 550 and the driving IC D-IC may be connected to each other.

[0059] Figure 7 is a circuit diagram during an automatic probing (AP) array inspection of a display panel according to an exemplary embodiment.

[0060] After the manufacture of the display panel integrated with the touch screen function and the display function is completed, the array of the display panel can be checked by an automatic detection array inspection method using an automatic detection unit (APU). In the automatic detection array inspection method, the array inspection of the display can be performed by supplying a common voltage and a data voltage to all touch electrodes. During the display period, all the same common voltages are supplied to the entire touch electrode 400, and RGB data is supplied according to the displayed image to check whether the display is driven normally.

[0061] The manufacturing method of the display panel according to the exemplary embodiment may include inspecting the array of the display panel. The manufacturing method of the display panel according to the exemplary embodiment may include: applying a VCOM enable signal from an automatic detection unit that inspects the array of the display panel; and applying a common voltage supplied from the automatic detection unit to the second signal line 420 through the switching transistor 550. By performing such an automatic detection array inspection, it can be checked whether the display function of each pixel operates normally.

[0062] In an exemplary embodiment, the second signal line 420 may be used as an AP line during the automatic detection array inspection. That is, at least one dummy line may be used as the second signal line 420. The second signal line 420 may supply a common voltage to the touch electrode 400 during the display period. In addition, the second signal line 420 may be used as an array inspection line during the automatic detection array inspection. According to an exemplary embodiment, a plurality of signal lines may be provided to improve brightness imbalance and minimize the process of adding a separate line.

[0063] Figure 8 is a diagram illustrating a touch electrode according to an exemplary embodiment.

[0064] According to another exemplary embodiment, the second signal line 420 may include a connection line 900 connected to the first signal line 410. By adding the connection line 900, the difference between the common voltages provided by the first signal line 410 and the second signal line 420 may be mitigated. When the connection line 900 is connected to the touch electrode 400, the number of signal lines providing the common voltage increases. Therefore, the common voltage applied to the touch electrode 400 may be more uniform, and the brightness imbalance caused by the change in the common voltage may be further improved.

[0065] Fig. 9 is a flowchart showing a method for manufacturing a display panel according to an exemplary embodiment. The method for manufacturing a display panel according to an exemplary embodiment includes: setting a touch electrode in S1010, which is configured to supply a common voltage through the electrode; setting a first signal line in S1020, which is connected to the touch electrode and configured to apply the common voltage applied by the driver IC to the touch electrode; setting a plurality of dummy lines in S1030, which are configured to be connected to the touch electrode; and setting a switching transistor in S1040, which is configured to supply the common voltage to the second signal line by switching by the applied VCOM enable signal, wherein the second signal line can provide the common voltage to the touch electrode. The second signal line may be at least one of the plurality of dummy lines. The method for manufacturing a display panel according to an exemplary embodiment is not limited to the order in which the components are provided.

[0066] Fig.10 is a flowchart illustrating a method of manufacturing a display panel according to an exemplary embodiment.

[0067] Reference Figure 7 and Fig.10 , the manufacturing method of the display panel according to the exemplary embodiment may further include: step S1110, inspecting the display panel by connecting the switch transistor 550 to the APU. Specifically, the method may include: applying a VCOM enable signal from an automatic detection unit for array inspection of the display panel; and applying a common voltage supplied to the second signal line 420 through the switch transistor 550 from the automatic detection unit.

[0068] The manufacturing method of the display panel according to the exemplary embodiment may further include: step S1120, connecting the switch transistor 550 to the driver IC D-IC. More specifically, when checking the array sum of the display panel, the manufacturing method of the display panel may include: connecting the gate of the switch transistor 550 and the driver IC D-IC to each other so that the VCOM enable signal is applied from the driver IC D-IC; and connecting the source of the switch transistor 550 and the driver IC D-IC to each other so that the common voltage to be supplied to the second signal line 420 through the switch transistor 550 is applied from the driver IC D-IC.

[0069] As described above, the display panel and the method of manufacturing the same according to various exemplary embodiments may solve the common voltage imbalance phenomenon occurring in the touch electrodes by including a plurality of signal lines supplying the common voltage to the touch electrodes.

[0070] The display panel and the method of manufacturing the same according to various exemplary embodiments have economical benefits in manufacturing processes by constituting signal lines of the display panel to be used for AP array inspection.

[0071] It will be apparent to those skilled in the art that various modifications and variations may be made to the display panel and method for manufacturing the same without departing from the technical concept or scope of the present disclosure. Therefore, it is intended that the present disclosure covers modifications and variations of the present disclosure as long as they fall within the scope of the attached claims and their equivalents.

[0072] CROSS-REFERENCE TO RELATED APPLICATIONS

[0073] This application claims the benefit of Korean Patent Application No. 10-2019-0179721, filed on December 31, 2019, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein.

Claims

1. A display panel, the display panel include: a touch electrode configured to receive a common voltage and including an electrode region and a dummy region; a first signal line, which is disposed on the electrode region, connected to the touch electrode and configured to supply the common voltage applied by the driving IC to the touch electrode; a second signal line, the second signal line being arranged on the dummy area; a plurality of dummy lines, the plurality of dummy lines being disposed on the dummy area and connected only to the touch electrodes; as well as a switching transistor configured to supply the common voltage to the second signal line by being switched by an applied enable signal, The second signal line is configured to supply the common voltage to the touch electrode. Wherein, when the array of the display panel is inspected by the automatic detection unit, The enable signal is configured to be applied from the automatic detection unit, and The common voltage supplied to the switching transistor is configured to be applied from the automatic detection unit, and Wherein, the second signal line is used as an array inspection line during automatic detection array inspection.

2. The display panel according to claim 1, in, The plurality of dummy lines are parallel to the first signal line.

3. The display panel according to claim 2, in, The touch electrode is divided into a first area and a second area by the plurality of virtual lines, wherein the second signal line is arranged in the first region to be parallel to the first signal line, and Wherein, the first signal line is arranged in the second area.

4. The display panel according to claim 2, in, The second signal line is provided as a plurality of second signal lines.

5. The display panel according to claim 1, in, The enable signal is configured to be applied from the driver IC, and The common voltage supplied to the switching transistor is configured to be applied from the driving IC.

6. The display panel according to claim 1, further comprising a connecting line, and in, The first signal line is electrically connected to the second signal line via the connection line.

7. The display panel according to claim 1, in, The second signal line includes at least one of the plurality of dummy lines.

8. A method for manufacturing a display panel, the manufacturing method The following steps are involved: Provide a touch electrode, the touch electrode receiving a common voltage through an electrode and including an electrode area and a dummy area; Disposing a first signal line on the electrode area, the first signal line being connected to the touch electrode and being configured to supply the common voltage applied by the driving IC to the touch electrode; Disposing a plurality of dummy lines on the dummy area, the plurality of dummy lines being disposed to be connected only to the touch electrodes; providing a switch transistor configured to supply the common voltage to the second signal line by switching by an applied enable signal; applying the enable signal from an automatic detection unit that inspects the array of display panels; as well as the common voltage supplied to the second signal line through the switching transistor is applied from the automatic detection unit, wherein the second signal line is configured to supply the common voltage to the touch electrode, and the second signal line is disposed in the dummy area, and Wherein, the second signal line is used as an array inspection line during automatic detection array inspection.

9. The manufacturing method according to claim 8, in, The second signal line includes at least one of the plurality of dummy lines.

10. The manufacturing method according to claim 8, in, The plurality of dummy lines are arranged parallel to the first signal line.

11. The manufacturing method according to claim 10, in, The touch electrode is divided into a first area and a second area by the plurality of virtual lines, wherein the second signal line is arranged in the first region to be parallel to the first signal line, and Wherein, the first signal line is arranged in the second area.

12. The manufacturing method according to claim 10, in, A plurality of second signal lines are provided.

13. The manufacturing method according to claim 8, further comprising: The following steps are involved: After inspecting the array of display panels, connecting a gate of the switching transistor and the driving IC to each other so that the enable signal is applied from the driving IC; as well as A source of the switching transistor and the driving IC are connected to each other so that the common voltage to be supplied to the second signal line through the switching transistor is applied from the driving IC.

14. The manufacturing method according to claim 8, in, The second signal line further includes a connection line connected to the first signal line.

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