Display device

Abstract

A display device according to an exemplary embodiment of the present application includes a substrate including a display area and a non-display area; a plurality of inspection pads in the non-display area; and a plurality of resistors, each resistor located at an outermost edge of a corresponding inspection pad of the plurality of inspection pads, each resistor located at a distance from the display area, the inspection pad located between the resistor and the display area, and the resistor located at an outermost edge of the non-display area.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2018-0123908, filed on October 17, 2018, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] An aspect of the embodiments of this disclosure relates to a display device, and more specifically, to a display device in which a resistor for preventing the introduction of static electricity is disposed at the outermost edge of a pad for inspection. Background Technology

[0004] Depending on the light emission method, display devices can be classified into liquid crystal displays (LCDs), organic light-emitting diode (OLED) displays, plasma display panels (PDPs), and electrophoretic displays.

[0005] A pixel in an OLED display includes two electrodes and an organic emission layer disposed between the two electrodes. Electrons injected from the cathode of one of the two electrodes and holes injected from the anode of the other electrode couple in the organic emission layer to form excitons, and emit light when the excitons emit energy.

[0006] Static electricity can be introduced into the display device from the outside, and the display elements may be damaged due to static electricity.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the background of the invention, and therefore may contain information that does not constitute prior art known to those skilled in the art in this country. Summary of the Invention

[0008] According to aspects of embodiments of the present invention, damage to the display device due to the introduction of static electricity can be prevented. According to aspects of embodiments of the present invention, a display device is provided in which a resistor for preventing or substantially preventing the introduction of static electricity is disposed at the outermost edge of a pad for inspection.

[0009] A display device according to one or more exemplary embodiments of the present invention includes: a substrate including a display area and a non-display area; a plurality of inspection pads in the non-display area; and a plurality of resistors, each resistor being located at the outermost edge of a corresponding inspection pad among the plurality of inspection pads, wherein each of the resistors is located at a distance from the display area, the inspection pads are located between the resistors and the display area, and the resistors are located at the outermost edge of the non-display area.

[0010] The resistors in a multi-resistor array can be located at each of the multiple inspection pads.

[0011] Resistors can include polysilicon.

[0012] The resistors in a multi-resistor array can have a resistance ranging from approximately 1kΩ to approximately 4kΩ.

[0013] The display device may further include a flexible printed circuit board pad portion arranged in a non-display area, and the inspection pad may be located on the opposite side of the flexible printed circuit board pad portion.

[0014] A display device according to one or more exemplary embodiments of the present invention includes: a substrate including a display area and a non-display area; and a plurality of inspection pads in the non-display area, wherein each of the plurality of inspection pads includes a plurality of horizontal portions spaced apart from each other and a vertical portion connecting the horizontal portions, and the vertical portions are alternately arranged at opposite edges of the horizontal portions.

[0015] Multiple horizontal and vertical portions of the inspection pad can be connected as a single line and can be formed in the shape of a rectangular plane.

[0016] The display device may include multiple resistors, each located at the outermost edge of a corresponding check pad among multiple check pads, and each of the resistors is located at a distance from the display area, the check pads are located between the resistors and the display area, and the resistors are located at the outermost edge of the non-display area.

[0017] Resistors can include polysilicon.

[0018] The resistors in a multi-resistor array can have a resistance ranging from approximately 1kΩ to approximately 4kΩ.

[0019] A display device according to one or more exemplary embodiments of the present invention includes: a substrate including a display area and a non-display area; and a plurality of inspection pads in the non-display area, wherein each of the plurality of inspection pads includes a through-plate area and a micro-line area, the micro-line area including a plurality of horizontal portions spaced apart from each other and vertical portions connecting the horizontal portions, and the vertical portions being alternately arranged at opposite edges of the horizontal portions.

[0020] The through-plate area can be located between the micro-line area and the display area.

[0021] The probe used for signal application can be configured to contact the through-plate area.

[0022] The display device may include multiple resistors, each located at the edge of a micro-line area, at the outermost edge of a corresponding check pad among multiple check pads, and at the outermost edge of a non-display area at a distance from the display area, with the check pads located between the resistors and the display area.

[0023] Resistors can include polysilicon.

[0024] The resistors in a multi-resistor array can have a resistance ranging from approximately 1kΩ to approximately 4kΩ.

[0025] According to an exemplary embodiment, the resistor is disposed at the outermost edge of the inspection pad in the display device, thereby preventing the display device from being damaged due to the introduction of external static electricity. Attached Figure Description

[0026] Figure 1 A display device according to an exemplary embodiment of the present invention is illustrated schematically.

[0027] Figure 2 It shows Figure 1 Region "A" in the text.

[0028] Figure 3 The illustration shows a portion of a display device based on a comparison example.

[0029] Figure 4 The inspection pads of the display device are shown according to the comparison example.

[0030] Figure 5 An inspection pad of a display device according to an embodiment of the present invention is shown.

[0031] Figure 6 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area corresponding to the area shown.

[0032] Figure 7 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area corresponding to the area shown.

[0033] Figure 8 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The same area as the area shown.

[0034] Figure 9 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area corresponding to the area shown.

[0035] Figure 10 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area corresponding to the area shown.

[0036] Figure 11 This is a partial layout diagram of a display device according to an exemplary embodiment of the present invention.

[0037] Figure 12It is intercepted along line XII-XII'. Figure 11 A cross-sectional view of the display device.

[0038] Figure 13 This is a cross-sectional view of a display device according to an exemplary embodiment of the present invention.

[0039] Symbol Explanation

[0040] 100: First substrate; 110: First base substrate

[0041] 111: Buffer layer; 121: Gate line

[0042] 124: Gate electrode; 140: Gate insulating layer

[0043] 154: Semiconductor layer; 160: Interlayer insulating layer

[0044] 200: Second substrate; 210: Second base substrate

[0045] 220: Light blocking component; 270: Second electrode

[0046] DA: Display area; NDA: Non-display area

[0047] 700: Check pads 500: Resistors

[0048] 701: Through-plate area; 702: Micro-line area Detailed Implementation

[0049] Here, some exemplary embodiments of the invention will be described in more detail with reference to the accompanying drawings. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention.

[0050] The figures and descriptions are to be considered illustrative rather than restrictive in nature. Throughout the specification, the same reference numerals denote the same elements.

[0051] Furthermore, for better understanding and ease of description, the dimensions and thicknesses of each configuration shown in the figures may be arbitrarily illustrated, but the invention is not limited thereto. In the figures, the thicknesses of layers, films, panels, regions, etc., may be exaggerated for clarity.

[0052] What will be understood is that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on that other element, or there may be one or more intermediate elements. In contrast, when an element is referred to as being "directly on" another element, there are no intermediate elements. The terms "on" or "above" mean placed on, above, or below the target portion, and do not necessarily mean placed on top of the target portion based on the direction of gravity.

[0053] In addition, unless explicitly stated otherwise, the word “including” and variations such as “comprising” or “containing” will be understood to imply the inclusion of the stated element but not the exclusion of any other element.

[0054] Additionally, in this specification, the phrase "in a plane" means viewing the target portion from the top, and the phrase "in a cross section" means viewing the cross section formed by vertically cutting the target portion from the side.

[0055] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments of the inventive concept pertain. It will be further understood that, unless expressly defined herein, terms such as those defined in common dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant field, and not as having an idealized or overly formal meaning.

[0056] Here, a display device according to an exemplary embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

[0057] Figure 1 A display device according to an exemplary embodiment of the present invention is schematically illustrated; and Figure 2 The diagram shows... Figure 1 The area "A" in the reference. Figure 1 and Figure 2 According to an exemplary embodiment of the present invention, a display device includes a display area DA and a non-display area NDA, and includes a plurality of pads (hereinafter referred to as inspection pads) 700 disposed in the non-display area NDA for inspection and a resistor 500 disposed at the outermost edge of each inspection pad 700.

[0058] Resistors 500 are disposed at the edge of each inspection pad 700 (i.e., the edge of the non-display area NDA) to prevent or substantially prevent static electricity from being introduced into the display area DA. In this exemplary embodiment, resistors 500 are disposed adjacent to the outermost edge of the non-display area NDA. Therefore, signals applied to the inspection pad 700 for inspection via probes or the like can be transmitted to the display area DA without passing through resistors 500. However, static electricity introduced from the outside is introduced through the edge of the non-display area NDA, and therefore, external static electricity can be blocked by resistors 500.

[0059] In this embodiment, resistor 500 may be formed of polycrystalline silicon. However, this is merely an example, and the specific material used to form resistor 500 is not limited thereto. In this embodiment, resistor 500 may have a resistance of approximately 1 kΩ to approximately 4 kΩ.

[0060] The inspection pad 700 is provided for illumination inspection of the display area DA, and after the display device is manufactured, a signal is applied to the inspection pad 700 to determine whether the display device is operating correctly. This inspection pad 700 is exposed even after the display device modules are manufactured. Figure 1 For ease of description, only some of the multiple check pads 700 are illustrated, but 20 or more check pads 700 can be provided in the display device. For example, various signals such as CLK signal, Vint signal, VGL signal, VGH signal, gate signal, data signal, etc. are transmitted through the check pads 700, and corresponding signals can be transmitted through their respective pads 700.

[0061] refer to Figure 1 The inspection pads 700 can be positioned on opposite sides, with the flexible printed circuit board (FPCB) pad portion 1000 positioned between them. However, this is just an example, and the position of the inspection pads 700 is not limited to this. Figure 1 The location shown.

[0062] exist Figure 1 In the middle, the FPCB pad portion 1000 can be connected to a flexible printed circuit board (FPCB) or a COP. That is to say, in Figure 1 In this context, the FPCB pad portion 1000 is the area that contacts or connects to the flexible printed circuit board or COP. The flexible printed circuit board may include gate drivers or data drivers.

[0063] The inspection pad 700 is provided for illumination inspection during the cell stage of the display device manufacturing process, prior to FPCB attachment. Therefore, as... Figure 1 As shown, pad 700 is not connected to the FPCB pad portion 1000, but is connected to the display area DA.

[0064] refer to Figure 1 The data lines and gate lines in the display area DA are connected as single wirings, so that they are connected to the inspection pads 700 of the non-display area NDA. That is, the gate lines of the display area DA are connected to the gate line inspection pads in the inspection pads 700, and the data lines of the display area DA are connected to the data line inspection pads in the inspection pads 700.

[0065] Therefore, inspecting pad 700 can determine whether the display device is operating properly before the FPCB is attached during the manufacturing process of the display device.

[0066] Figure 3 The inspection pad 800 of the display device according to the comparison example is shown. (Reference) Figure 3Electrostatic discharge (ESD) is introduced through the edge of the exposed inspection pad 800. The introduced ESD can damage the organic light-emitting diode 710 connected to the inspection pad 800. Figure 3 In the image, area "B" is an enlarged view of the damaged organic light-emitting diode 710. (Reference) Figure 3 The damaged area turned black. Additionally, although not in Figure 3 As shown in the middle diagram, however, static electricity introduced into the display area DA can damage the organic light-emitting element.

[0067] In other words, if it is possible to pass Figure 3 As determined, even after the display device is modularized, the inspection pad 800 is exposed to the outside, resulting in the introduction of static electricity, which can damage the display device.

[0068] However, as Figure 1 and Figure 2 As shown, resistor 500 is disposed at the outermost edge of inspection pad 700 in the display device according to an exemplary embodiment of the present invention. Therefore, the introduction of external static electricity can be prevented by resistor 500, and correspondingly, damage to the display device due to static electricity can be prevented.

[0069] In addition, since the resistor 500 is located at the outermost edge of the inspection pad 700, RC delay caused by the resistor 500 can be prevented during the operation of the inspection pad 700.

[0070] Figure 4 The pads of a display device, according to a comparison example, are shown for inspection. (Reference) Figure 4 Resistor 510 is only provided in some of the plurality of check pads 800. Furthermore, resistor 510 is provided at the edge of each check pad 800 near the edge of the display area DA. That is, in the comparison example, resistor 510 is provided on the path through which the signal applied to the check pad 800 is transmitted.

[0071] Some of the multiple check pads 800 may be pads to which high-speed signals, such as the CLK signal, are transmitted. When a resistor is placed between such a check pad 800 and the display area DA, RC delay may occur, leading to degradation of the display device's characteristics. Therefore, in the case of the display device according to the comparative example, such as Figure 4 As shown, resistor 510 is provided only in some of the plurality of check pads 800. That is, resistor 510 can be provided only in check pads 800 where signal delay does not cause problems. Therefore, resistor 510 may not be provided in some of the check pads 800, and static electricity can be introduced through check pads 800 where resistor 510 is not provided.

[0072] However, in the display device according to this exemplary embodiment, the resistor 500 is disposed at the outermost edge of the test pad 700, such that the resistor 500 is provided in all test pads 700. That is, since the resistor is not disposed in the path through which the signal applied to the test pad 700 is transmitted, externally introduced static electricity can be effectively blocked without causing signal delay.

[0073] Figure 5 An inspection pad of a display device according to this exemplary embodiment is shown. Reference Figure 5 Resistor 500 is positioned at the outermost edge of inspection pad 700. Therefore, it can effectively block externally introduced static electricity.

[0074] Signal application to the inspection pads 700 can be implemented by contacting the center of each inspection pad 700 with a probe. Figure 5 The exemplary diagram illustrates probe 900. That is, probe 900 contacts the center of test pad 700, causing a signal to be applied to display area DA. In the display device according to this exemplary embodiment, resistor 500 is disposed at the outermost edge of test pad 700, and therefore, resistor 500 is not disposed on the path through which the signal applied from probe 900 is transmitted. Therefore, RC delay due to resistor 500 can be prevented. Since no signal delay due to resistor 500 occurs, resistor 500 can be provided in all test pads 700, and thus static electricity can be effectively blocked.

[0075] Next, a display device according to another exemplary embodiment of the present invention will be described. Figure 6 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area corresponding to the area shown.

[0076] refer to Figure 6 The inspection pad 700 according to an exemplary embodiment of the present invention has a shape in which minute lines repeat in a zigzag pattern, rather than a through-plate shape. Specifically, refer to Figure 6 The inspection pad 700 includes multiple horizontal portions 700a and multiple vertical portions 700b connecting the horizontal portions 700a. Each vertical portion 700b is provided only on one edge or side of an adjacent horizontal portion 700a, and not on the other edge or side. That is, the vertical portions 700b are alternately provided on opposite edges or sides of the horizontal portions 700a to connect the horizontal portions 700a. Therefore, the inspection pad 700 has a shape in which one of the connecting lines extends repeatedly from left to right.

[0077] In other words, the signal travels along its transmission path in Figure 6The inspection pad 700 is longer than that in the through-board. Since resistance is proportional to the length of the conductor, the inspection pad 700 acts as a resistor as the signal is extended along its transmission path. Therefore, external static electricity can be blocked without using additional resistors. As a result, the process can be economical and the structure can be simplified.

[0078] Figure 7 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area shown corresponds to the region shown. (Reference) Figure 7 Except that resistor 500 is disposed at one edge of inspection pad 700, the display device according to this exemplary embodiment is similar to that according to Figure 6 The above describes a display device according to an exemplary embodiment. Further detailed descriptions of the same components will be omitted.

[0079] According to Figure 7 In the display device of the exemplary embodiment, the check pad 700 is formed in a shape in which minute lines repeatedly move in a zigzag pattern, rather than being provided as a through-plate, and a resistor 500 is disposed at the outermost edge of the check pad 700. Therefore, external static electricity is first blocked by the resistor 500, and then again blocked by the check pad 700 because the check pad 700 itself acts as a resistor. Thus, the introduction of static electricity into the display area DA can be prevented more effectively. In other words, in the display device according to this exemplary embodiment, static electricity is initially blocked by the resistor 500, and then secondarily blocked by the check pad 700, and therefore, the introduction of static electricity can be effectively prevented.

[0080] Figure 8 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area shown corresponds to the region. Besides inspecting pad 700, which includes through-board area 701 and micro-line area 702, Figure 8 Display devices and Figure 6 The display devices are the same. Further detailed descriptions of the identical components are omitted. (See reference) Figure 8 In the display device according to this exemplary embodiment, the inspection pad 700 includes a through-plate area 701 and a micro-line area 702.

[0081] According to Figure 8 In the exemplary embodiment of the display device, the inspection pad 700 is partly a through-plate area 701 and partly a micro-line area 702. The through-plate area 701 is positioned close to the display area DA, while the micro-line area 702 is positioned adjacent to the edge of the non-display area NDA. That is, the through-plate area 701 is disposed between the micro-line area 702 and the display area DA.

[0082] The probe 900, used to apply a signal to the inspection pad 700, contacts the through-plate area 701. Therefore, the signal transmitted to the display area DA can be transmitted to the display area DA without experiencing delay due to resistance. Thus, signal delay that occurs when the signal passes through the micro-line area 702 can be prevented, and in the exemplary embodiment, the signal is transmitted along a short path.

[0083] exist Figure 8 In this process, externally introduced static electricity must pass through the micro-line area 702. However, since the long micro-line area 702 itself acts as a resistor, it can effectively prevent the introduction of static electricity into the display area DA.

[0084] In other words, in the display device according to this exemplary embodiment, signals can be transmitted to the display area DA without delay, and at the same time, the introduction of external static electricity can be effectively prevented.

[0085] Figure 9 A display device according to another exemplary embodiment of the present invention is shown. Except that the resistor 500 is disposed at the edge of the inspection pad 700, Figure 9 The display device of the exemplary embodiment and according to Figure 8 The display device is the same as that in the exemplary embodiment. Further detailed description of the same constituent elements is omitted.

[0086] In other words, according to Figure 9 In the exemplary embodiment of the display device, the inspection pad 700 includes a through-plate area 701 and a micro-line area 702, and the resistor 500 is disposed at the edge of the micro-line area 702.

[0087] and Figure 8 Compared to the exemplary embodiments, in Figure 9 In an exemplary embodiment, a resistor 500 is further included, and therefore, the introduction of external static electricity can be prevented more effectively. That is, signals can be transmitted to the display area DA without delay by inspecting the through-plate area 701 of the pad 700, and the introduction of external static electricity can be effectively prevented by inspecting the micro-line area 702 of the pad 700 and the resistor 500.

[0088] Figure 10 A display device according to another exemplary embodiment of the present invention is shown with Figure 2 The area shown corresponds to the region shown. (Reference) Figure 10 In the display device according to this exemplary embodiment, the inspection pad 700 includes a first region 703 and a second region 704, and the first region 703 is configured to be adjacent to the edge of the display device. That is, the second region 704 is disposed between the first region 703 and the display area (not shown).

[0089] The resistance of region 703 in the first region is higher than the resistance of region 704 in the second region. Figure 10 In an exemplary embodiment, the inspection pads 700 are formed of materials each having different resistances, and therefore each region of the inspection pads 700 has a different resistance. In an embodiment, the first region 703 may have a resistance of about 1 kΩ to about 4 kΩ.

[0090] As described, in the embodiment, the inspection pad 700 has different resistance in each region, and when the first region 703, which is located at the edge of the inspection pad 700, has a higher resistance, it can effectively prevent the introduction of external static electricity.

[0091] Next, the pixel structure of a display device according to an exemplary embodiment of the present invention will be described in more detail with reference to the accompanying drawings. Figure 11 This is a partial layout diagram of a display device according to an exemplary embodiment of the present invention; and Figure 12 It is intercepted along line XII-XII'. Figure 11 A cross-sectional view of the display device.

[0092] refer to Figure 11 and Figure 12 The display panel 300 includes a first substrate 100, a second substrate 200 overlapping the first substrate 100, and a liquid crystal layer 3 disposed between the first substrate 100 and the second substrate 200.

[0093] The first substrate 100 will now be described. A gate conductor, including a gate line 121 and a gate electrode 124, is disposed on one side of a first substrate 110 made of transparent glass or plastic.

[0094] Gate line 121 may extend in a first direction. Gate conductor may include any of various metals or conductors and may have a multilayer structure. Gate insulating layer 140 is disposed between gate conductor and liquid crystal layer 3. Gate insulating layer 140 may include inorganic insulating material.

[0095] The semiconductor layer 154 is disposed on one side of the gate insulating layer 140.

[0096] Data line 171 is disposed between semiconductor layer 154 and liquid crystal layer 3 and extends in the second direction, thus intersecting with gate line 121. Source electrode 173 extends from data line 171 and can therefore overlap with gate electrode 124. Drain electrode 175 is separate from data line 171 and, as... Figure 11 As shown, it can be formed into the shape of a strip extending toward the center of the source electrode 173.

[0097] A portion of the semiconductor layer 154 may not overlap with the data line 171 and the drain electrode 175 in the region between the source electrode 173 and the drain electrode 175. Apart from such non-overlapping portions, the semiconductor layer 154 may have substantially the same planar shape as the data line 171 and the drain electrode 175.

[0098] A gate electrode 124, a source electrode 173, and a drain electrode 175 together with a semiconductor layer 154 form a thin-film transistor, and the channel of the thin-film transistor is the region of the semiconductor layer 154 between the source electrode 173 and the drain electrode 175.

[0099] A passivation layer 180 is disposed between the source electrode 173, the drain electrode 175, and the liquid crystal layer 3. The passivation layer 180 may include inorganic insulating materials such as silicon nitride and silicon oxide, organic insulating materials, low dielectric constant insulating materials, etc.

[0100] The passivation layer 180 includes a contact hole 185 that overlaps with a portion of the drain electrode 175.

[0101] The first electrode 191 is disposed between the passivation layer 180 and the liquid crystal layer 3. The first electrode 191 is physically and electrically connected to the drain electrode 175 through the contact hole 185, and receives data voltage from the drain electrode 175. The first electrode 191 may be a pixel electrode.

[0102] The first alignment layer 11 is disposed between the first electrode 191 and the liquid crystal layer 3.

[0103] The second substrate 200 includes a second base substrate 210, a light blocking member 220, a second electrode 270, and a second alignment layer 21.

[0104] The second electrode 270 is disposed on one side of the second substrate 210. The second electrode 270 may be a common electrode.

[0105] A light-blocking member 220 is disposed between the second substrate 210 and the second electrode 270. The light-blocking member 220 may extend in a second direction while overlapping with the data line 171. Although not shown, the light-blocking member 220 may further include a horizontal portion extending in a first direction while overlapping with the gate line 121. However, in another embodiment, the light-blocking member 220 may be omitted. A second alignment layer 21 is disposed between the second electrode 270 and the liquid crystal layer 3.

[0106] The above structure is merely an example, and the structure of the display device is not limited to this. Figure 11 and Figure 12 The structure shown.

[0107] Next, we will refer to Figure 13The pixel structure of a display device according to another exemplary embodiment of the present invention will be described in more detail. Figure 13 This is a cross-sectional view of a display device according to an exemplary embodiment of the present invention.

[0108] refer to Figure 13 A buffer layer 111 made of silicon oxide or silicon nitride is disposed on the first substrate 110.

[0109] Semiconductor layer 154 is disposed on buffer layer 111. Semiconductor layer 154 includes a source region 153 and a drain region 155 doped with p-type impurities, and a channel region 151 disposed between the source region 153 and the drain region 155.

[0110] A gate insulating layer 140 is disposed on the semiconductor layer 154 and the buffer layer 111, and may include silicon oxide or silicon nitride. A gate electrode 124 is disposed on the gate insulating layer 140 and overlaps with the channel region 151 of the semiconductor layer 154.

[0111] An interlayer insulating layer 160 is disposed on the gate electrode 124 and the gate insulating layer 140. The interlayer insulating layer 160 includes a first contact hole 165 and a second contact hole 163.

[0112] Data conductors, including data line 171, source electrode 173 and drain electrode 175, are disposed on interlayer insulating layer 160.

[0113] The drain electrode 175 is connected to the drain region 155 through the first contact hole 165. Additionally, the source electrode 173 is connected to the source region 153 through the second contact hole 163.

[0114] A passivation layer 180 is disposed on the data conductors (171, 173 and 175) and the interlayer insulation layer 160, and includes a contact hole 185.

[0115] A first electrode 191 is disposed on a passivation layer 180. The first electrode 191 may be a pixel electrode. The first electrode 191 is connected to a drain electrode 175 through a contact hole 185. A barrier 361 is disposed on the passivation layer 180. A light-emitting element layer 370 is disposed overlapping the first electrode 191, and a second electrode 270 is disposed overlapping the light-emitting element layer 370. The second electrode 270 may be a common electrode.

[0116] In this case, the first electrode 191 can be the anode of a hole injection electrode, and the second electrode 270 can be the cathode of an electron injection electrode. However, the invention is not limited thereto, and depending on the driving method of the display device, the first electrode 191 can be the cathode and the second electrode 270 can be the anode.

[0117] The light-emitting element layer 370 may include an emission layer, an electron transport layer, a hole transport layer, etc.

[0118] The encapsulation layer 390 is disposed while overlapping with the second electrode 270. The encapsulation layer 390 may comprise organic or inorganic materials, or organic and inorganic materials that can be alternately stacked. The encapsulation layer 390 can protect the display device from external environmental influences such as moisture, heat, and other contaminants.

[0119] As described, in an embodiment of the invention, the resistor 500 is disposed at the outermost edge of the check pad 700 in the display device, and therefore can effectively block the introduction of static electricity without causing signal delay. In the embodiment, since each check pad 700 includes a fine line area, the check pad 700 can function as a resistor and can effectively prevent the introduction of static electricity, thereby preventing or substantially preventing damage to the display device due to static electricity.

[0120] While the invention has been described in conjunction with exemplary embodiments which are now considered to be practical, it should be understood that the invention is not limited to the disclosed embodiments, but rather is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A display device, comprising: a substrate including a display area and a non-display area; and a plurality of inspection pads in the non-display area, wherein each of the plurality of inspection pads includes a through-board area and a fine line area, the fine line area includes a plurality of horizontal portions spaced apart from each other and vertical portions connecting the horizontal portions, the vertical portions are alternately arranged at opposite edges of the horizontal portions, and the through-board area is located between the fine line area and the display area. a probe for signal application is configured to contact the through-board area.

2. The display device of claim 1, wherein, 3.The display device of claim 1, further comprising a plurality of resistors, each of the plurality of resistors is located at an edge of the fine line area, the resistors are located at outermost edges of a respective inspection pad of the plurality of inspection pads and at outermost edges of the non-display area while being located at a distance from the display area, the inspection pad is located between the resistor and the display area. the plurality of resistors includes polysilicon.

4. The display device of claim 3, wherein, a resistor of the plurality of resistors has a resistance of 1kΩ to 4kΩ.

5. The display device of claim 3, wherein, 6.The display device of claim 1, further comprising a flexible printed circuit board pad in the non-display area, wherein the inspection pads are disposed on both sides of the flexible printed circuit board pad. 7.The display device of claim 6, wherein the inspection pads are not connected with the flexible printed circuit board pad, and wherein some of the inspection pads are connected with data lines of the display area and some of the inspection pads are connected with gate lines of the display area. ​

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