Display Devices

Abstract

A display device includes: a substrate; an insulating layer on the substrate and including a first opening; a first panel pad on the substrate and the insulating layer; and an anisotropic conductive film on the first panel pad, wherein the first panel pad includes: a central region located in the center of the first opening, and a first edge region and a second edge region arranged along the outer side surface of the insulating layer and located on each side of the central region relative to a first direction, and the anisotropic conductive film overlaps with at least one of the central region, the first edge region, and the second edge region of the first panel pad.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0132889, filed in the Korean Intellectual Property Office on October 24, 2019, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Aspects of embodiments of the present disclosure relate to a display device. Background Art

[0004] A display device such as an organic light emitting device or a liquid crystal display is used. The display device includes a display panel, and the display panel includes pixels for displaying an image. In addition to the pixels, the display panel includes a pad portion, a driving device and a plurality of panel pads for inputting and outputting signals for controlling the pixels and the driving device are arranged on the pad portion, and a flexible printed circuit board (FPCB) is bonded to the pad portion as an integrated circuit (IC) chip or a film. In this case, an anisotropic conductive film (ACF) including a conductive ball is used for the purpose of electrical connection and physical bonding of the pad portion.

[0005] Recently, the demand for display devices having a small dead zone (which is arranged near the area of ​​the display panel for displaying an image) is increasing. When the dead zone becomes larger, the area for displaying an image may appear relatively small. As the dead zone becomes smaller, the panel pad also gradually becomes smaller, and therefore, an electrical connection with a pad portion that improves reliability is required.

[0006] The above information disclosed in this Background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention

[0007] According to aspects of the present disclosure, there is provided a display device having reduced resistance and preventing or substantially preventing anisotropic conductive film (ACF) peeling by increasing a contact area of ​​a panel pad.

[0008] According to another aspect of the present disclosure, a display device is provided having improved electrical connection reliability of panel pads by preventing or substantially preventing conductive balls of anisotropic conductive film (ACF) from flowing to the outside of the panel pads and preventing or substantially preventing adjacent panel pads from being electrically connected to each other.

[0009] According to one or more embodiments, a display device includes: a substrate; an insulating layer on the substrate and including a first opening; a first panel pad on the substrate and the insulating layer; and an anisotropic conductive film (ACF) on the first panel pad, wherein the first panel pad includes: a central region located in the center of the first opening, and a first edge region and a second edge region arranged along an outer side surface of the insulating layer and located on each side of the central region relative to a first direction, and the anisotropic conductive film (ACF) overlaps with at least one of the central region, the first edge region, and the second edge region of the first panel pad.

[0010] The display device may further include: a second panel pad arranged near the first panel pad in the first direction; and an organic layer on the insulating layer, wherein the organic layer may include a first organic layer and a second organic layer spaced apart from each other, and the first panel pad and the second panel pad are between the first organic layer and the second organic layer.

[0011] The display device may further include a first lower pattern between the substrate and a central area of ​​the first panel pad.

[0012] The display device may further include a second lower pattern between the substrate and a central area of ​​the first panel pad and spaced apart from the first lower pattern in a second direction crossing the first direction.

[0013] A central area of ​​the first panel pad may include a plurality of protrusions, and the protrusions may overlap the first and second lower patterns.

[0014] The first lower pattern may extend along a central area of ​​the first panel pad.

[0015] A central area of ​​the first panel pad may include a protrusion portion, and the protrusion portion may overlap the first lower pattern.

[0016] The display device may further include a second lower pattern between the substrate and a central area of ​​the first panel pad and spaced apart from the first lower pattern in the first direction.

[0017] A central area of ​​the first panel pad may include a plurality of protrusions, and the protrusions may overlap the first and second lower patterns.

[0018] The display device may further include: a second panel pad arranged near the first panel pad in the first direction; and an organic layer on the insulating layer, wherein the organic layer may be between the first panel pad and the second panel pad, and the organic layer may not be located on the first edge area and the second edge area of ​​the first panel pad.

[0019] The display device may further include: a data line for applying a data voltage; and a first extension wiring extending from the first panel pad and electrically connected to the data line, wherein the first extension wiring may overlap the first organic layer.

[0020] The display device may further include: a second extension wiring extending from the first panel pad; and a test wiring, wherein the insulating layer may include a second opening exposing the test wiring, the second extension wiring may be connected to the test wiring in the second opening, and the second extension wiring may overlap the second organic layer.

[0021] The display device may further include a flexible printed circuit board including a connection pad, wherein the connection pad may be electrically connected to the first panel pad through an anisotropic conductive film (ACF).

[0022] According to one or more embodiments, a display device includes: a display panel including a first panel pad and an organic layer exposing the first panel pad; a flexible printed circuit board including a connection pad; and an anisotropic conductive film (ACF) between the display panel and the flexible printed circuit board, wherein the first panel pad may include a recessed central area and an edge area around the central area, and the organic layer may include a first organic layer and a second organic layer spaced apart from each other, with the first panel pad between the first organic layer and the second organic layer.

[0023] The display panel may further include a substrate and an insulating layer between the substrate and the first panel pad, and the insulating layer may include a first opening in a region corresponding to a central region of the first panel pad.

[0024] The display panel may further include a first lower pattern between the substrate and a central area of ​​the first panel pad.

[0025] The display panel may further include: a second panel pad located near the first panel pad in the first direction; and a second lower pattern between the substrate and a central area of ​​the first panel pad and spaced apart from the first lower pattern in a second direction crossing the first direction.

[0026] A width of the first lower pattern may be equal to or greater than 2 μm.

[0027] The first lower pattern may extend along a central area of ​​the first panel pad.

[0028] The display panel may further include: a second panel pad located adjacent to the first panel pad in the first direction; and a second lower pattern between the substrate and a central area of ​​the first panel pad and spaced apart from the first lower pattern in the first direction.

[0029] According to aspects of the embodiments, a contact area of ​​a panel pad is increased to reduce resistance, and an anisotropic conductive film (ACF) may be prevented or substantially prevented from being peeled off from a display panel.

[0030] Furthermore, conductive balls of anisotropic conductive film (ACF) may be prevented or substantially prevented from flowing outside the panel pads, the panel pads may be prevented or substantially prevented from being electrically connected to each other, and electrical connection reliability of the panel pads may be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A top plan view of a display device according to example embodiments is shown.

[0032] Figure 2 An exploded perspective view of a display device according to an example embodiment is shown.

[0033] Figure 3 Shows Figure 2 An enlarged top plan view of area "A".

[0034] Figure 4 Shows relative to Figure 3 Cross-sectional view along line IV-IV'.

[0035] Figure 5 Shows relative to Figure 3 Cross-sectional view along line V-V'.

[0036] Figure 6 FIG. 1 shows a display device according to an example embodiment. Figure 2 An enlarged top plan view of area "A".

[0037] Figure 7 Shows relative to Figure 6 Cross-sectional view along line VII-VII'.

[0038] Figure 8 Shows relative to Figure 6 Cross-sectional view along line VIII-VIII'.

[0039] Fig. 9 FIG. 1 shows a display device according to an example embodiment. Figure 2 An enlarged top plan view of area "A".

[0040] Fig.10 Shows relative to Fig. 9 Cross-sectional view along line XX'.

[0041] Fig.11 FIG. 1 shows a display device according to an example embodiment. Figure 2 An enlarged top plan view of area "A".

[0042] Fig.12 Shows about Fig.11 Cross-sectional view along line XII-XII'.

[0043] Fig.13 FIG. 1 shows a display device according to an example embodiment. Figure 2 An enlarged top plan view of area "A".

[0044] Fig.14 Shows relative to Fig.13 Cross-sectional view along line XIV-XIV'. DETAILED DESCRIPTION

[0045] The present invention will be described more fully herein with reference to the accompanying drawings in which some example embodiments of the present invention are shown. As those skilled in the art will appreciate, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0046] The drawings and description are to be regarded as illustrative in nature and not restrictive, and like reference numerals refer to like elements throughout the specification.

[0047] For better understanding and ease of description, the size and thickness of each configuration shown in the drawings may be arbitrarily shown, and the present invention is not limited thereto. In the drawings, for clarity, the thickness of layers, films, panels, regions, etc. may be exaggerated. For better understanding and ease of description, the thickness of some layers and regions may be exaggerated.

[0048] In addition, it will be understood 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 the other element, or one or more intermediate elements may also be present. Conversely, when an element is referred to as being "directly" "on" another element, there are no intermediate elements. In addition, in the specification, "on" or "above" means being placed on or under an object part, and does not necessarily mean being placed on the upper side of the object part based on the direction of gravity.

[0049] Unless explicitly described to the contrary, “comprise” and variations thereof such as “include” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0050] The phrase "in plane" means observing an object portion from the top, and the phrase "in cross section" means observing a cross section in which the object portion is vertically cut from the side.

[0051] It will be understood that the terms "first" and "second" are used herein to describe various components, but these components should not be limited by these terms. The above terms are used to distinguish one component from another component. For example, a first component may be referred to as a second component, and vice versa, without departing from the scope of the present inventive concept. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0052] In addition, terms such as "lower", "lower side", "upper" and "upper side" are used to describe the relationship of the configurations shown in the drawings. These terms are described as relative concepts based on the directions shown in the drawings. It will be understood that in addition to the orientations depicted in the drawings, the spatially relative terms are intended to also include different orientations of the device in use or operation.

[0053] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the invention belongs. In addition, terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with the meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless they are explicitly defined as such herein.

[0054] Now refer to Figure 1 and Figure 2 A display device 10 according to an example embodiment is described. Figure 1 shows a top plan view of a display device according to an example embodiment; and Figure 2 According to the reference Figure 1 An exploded perspective view of a display device of an example embodiment is shown.

[0055] refer to Figure 1 and Figure 2 , a display device 10 according to an example embodiment includes a display panel 100 , a flexible printed circuit board 500 , and an anisotropic conductive film (ACF) 600 for connecting the display panel 100 and the flexible printed circuit board 500 .

[0056] In an embodiment, the display panel 100 may be an organic light emitting panel including an organic light emitting diode or a liquid crystal panel including a liquid crystal layer.

[0057] The display panel 100 includes a display area DA for displaying an image and a peripheral area PA in which elements and wirings for generating or transmitting various signals applied to the display area DA are arranged. The peripheral area PA may be arranged outside the display area DA. Figure 1 However, it is not limited thereto and may be disposed on one side of the display panel 100. The display area DA is shown in FIG. Figure 1; however, the display area DA may have any of various shapes other than a quadrangular shape, such as a circular shape, an elliptical shape, or a polygonal shape.

[0058] A plurality of signal lines and pixels PX connected to the plurality of signal lines are arranged in a display area DA of the display panel 100. The signal lines include a gate line 121 and a data line 171. In an embodiment, the gate line 121 may extend substantially in a row direction (or horizontal direction), and the data line 171 may extend substantially in a column direction (or vertical direction). The pixel PX represents a minimum unit for displaying an image, and the display device 10 may display an image through the pixel PX. The pixel PX may be connected to the gate line 121 and the data line 171, and may receive a gate signal and a data signal from the signal line.

[0059] According to an example embodiment, the plurality of signal lines arranged in the display area DA of the display panel 100 may further include a driving voltage line (not shown) for transmitting a driving voltage (ELVDD) and a common voltage line (not shown) for transmitting a common voltage (ELVSS). In an embodiment, the plurality of signal lines may further include a previous gate line (not shown) for transmitting a previous scan signal, an emission control line (not shown) for transmitting an emission control signal, a bypass control line (not shown) for transmitting a bypass signal, and an initialization voltage line (not shown) for transmitting an initialization voltage.

[0060] When the display panel 100 is an organic light emitting panel, the pixel PX may include a plurality of transistors (not shown), a storage capacitor (not shown) and an organic light emitting diode (not shown). For example, the plurality of transistors may include a driving transistor, a switching transistor and a compensation transistor.

[0061] The driving transistor, the switching transistor, and the compensation transistor may include a gate electrode, a source electrode, and a drain electrode.

[0062] The driving transistor includes a gate electrode connected to the first electrode of the storage capacitor, a source electrode connected to the driving voltage line, and a drain electrode electrically connected to the anode of the organic light emitting diode. The driving transistor can receive a data signal according to the switching operation of the switching transistor and can supply a driving current to the organic light emitting diode.

[0063] The switching transistor includes a gate electrode connected to the gate line 121, a source electrode connected to the data line 171, and a drain electrode connected to the source electrode of the driving transistor and the driving voltage line.

[0064] The switching transistor may be turned on by a gate signal received through the gate line 121 , and may perform a switching operation for transmitting a data signal transmitted through the data line 171 to a source electrode of the driving transistor.

[0065] The compensation transistor includes a gate electrode connected to the gate line 121, a source electrode connected to the drain electrode of the driving transistor and the anode of the organic light emitting diode, and a drain electrode connected to the first electrode of the storage capacitor and the gate electrode of the driving transistor. The compensation transistor can be turned on by a gate signal received through the gate line 121, and it can connect the gate electrode and the drain electrode of the driving transistor, thereby diode-connecting the driving transistor.

[0066] The storage capacitor may include a first electrode and a second electrode facing each other. The second electrode of the storage capacitor may be connected to the driving voltage line. The cathode of the organic light emitting diode may be connected to the common voltage line.

[0067] An organic light emitting diode may include an anode as a hole injection electrode, a cathode as an electron injection electrode, and an organic emission layer in which excitons as a combination of holes injected from the anode and electrons injected from the cathode drop from an excited state to a ground state to generate emission.

[0068] A panel pad PP for receiving a signal from the outside of the display panel 100 is arranged in the peripheral area PA of the display panel 100. The panel pad PP may be electrically connected to a plurality of signal lines arranged in the display area DA. A gate driver (not shown) may be integrated in the peripheral area PA of the display panel 100, and the gate driver may be arranged as an integrated circuit chip.

[0069] The flexible printed circuit board 500 may be bent, and includes a data driver IC 550 and connection pads CP.

[0070] The data driver IC 550 may generate a data voltage as a grayscale voltage corresponding to an input image signal. The data driver IC 550 may be mounted on the flexible printed circuit board 500 and may be connected to the connection pad CP as a tape carrier package (TCP).

[0071] The connection pads CP are arranged at one side of the flexible printed circuit board 500. The connection pads CP may be electrically connected to the panel pads PP of the display panel 100 through the anisotropic conductive film 600.

[0072] The anisotropic conductive film 600 may include conductive balls (refer to Figure 4610) and is arranged between the panel pads PP of the display panel 100 and the connection pads CP of the flexible printed circuit board 500. The panel pads PP of the display panel 100 and the connection pads CP of the flexible printed circuit board 500 are connected by at least one conductive ball 610, and may be connected by a plurality of conductive balls 610. The display panel 100 and the flexible printed circuit board 500 are connected by the anisotropic conductive film 600, and the display panel 100 may receive a signal from the flexible printed circuit board 500.

[0073] Now refer to Figures 3 to 5 The panel pad PP of the display device 10 according to example embodiments is described in more detail. Figure 3 Shows Figure 2 an enlarged top plan view of area "A"; Figure 4 Shows relative to Figure 3 A cross-sectional view of line IV-IV'; and Figure 5 Shows relative to Figure 3 Cross-sectional view along line V-V'. Figure 4 and Figure 5 An anisotropic conductive film (ACF) 600 including conductive balls 610 connecting the flexible printed circuit board 500 and the display panel 100 together is shown.

[0074] refer to Figures 3 to 5 In an embodiment, the display panel 100 includes a substrate 110 , an insulating layer 140 , a test wiring 122 , a panel pad PP, and an organic layer 180 .

[0075] The insulating layer 140 is arranged on the substrate 110 and includes a first opening 61 in a portion overlapping with the central area CA of the panel pad PP. In an embodiment, the insulating layer 140 includes a first insulating layer 141 and a second insulating layer 142. The first insulating layer 141 is arranged on the substrate 110, and the second insulating layer 142 is arranged on the first insulating layer 141. The second insulating layer 142 includes a second opening 62 for exposing the test wiring 122.

[0076] According to example embodiments, the gate line 121, the gate electrodes of a plurality of transistors, and the storage capacitor may be arranged on the first insulating layer 141 in the display area DA, the second insulating layer 142 may be arranged on the gate line 121, the gate electrodes of a plurality of transistors, and the storage capacitor, and the data line 171 and the source and drain electrodes of the plurality of transistors may be arranged on the second insulating layer 142.

[0077] The test wiring 122 is disposed between the first insulating layer 141 and the second insulating layer 142. The test wiring 122 may be connected to the second extension wiring 173 through the second opening 62 of the second insulating layer 142, and may transmit a test signal for testing a normal operation to the panel pad PP.

[0078] The panel pad PP, the first extension wiring 172, and the second extension wiring 173 are arranged on the insulating layer 140 and the substrate 110. The panel pad PP is set in the first direction DR1. The panel pads PP each extend in the second direction DR2. The panel pad PP includes a central area CA and an edge area EA. The central area CA of the panel pad PP overlaps with the first opening 61 of the insulating layer 140 and is arranged in the center of the first opening 61, and the edge area EA of the panel pad PP is arranged along the outer side of the insulating layer 140. The central area CA of the panel pad PP is arranged in the first opening 61 of the insulating layer 140, so that the central area CA of the panel pad PP can be arranged closer to the substrate 110 than the edge area EA of the panel pad PP. In other words, the central area CA of the panel pad PP arranged in the area corresponding to the first opening 61 of the insulating layer 140 may have a concave shape. In an embodiment, the central area CA and the edge area EA of the panel pad PP do not overlap with the organic layer 180. The central area CA and the edge area EA of the panel pad PP may contact the anisotropic conductive film (ACF) 600 .

[0079] Regarding the display device 10 according to the example embodiment, the central area CA of the panel pad PP has a concave shape so that the conductive balls 610 of the anisotropic conductive film 600 are gathered in the central area CA of the panel pad PP. Therefore, the conductive balls 610 are prevented or substantially prevented from flowing to the outside of the panel pad PP, and the panel pads PP arranged near the conductive balls 610 are prevented or substantially prevented from being electrically connected to each other. Figure 4 and Figure 5 It is shown that a plurality of conductive balls 610 are arranged on the panel pad PP. Figure 4 and Figure 5 The conductive balls 610 may have various sizes, and the conductive balls 610 may have sizes such that the panel pads PP and the connection pads CP may be electrically connected to each other through the anisotropic conductive film 600 .

[0080] Figure 4 2 shows that in the embodiment the conductive ball 610 is small and a plurality of conductive balls 610 corresponds to one panel pad PP, and further, a conductive ball 610 arranged at an edge area EA of the panel pad PP among the plurality of conductive balls 610 is shown to contact the connection pad CP. Figure 4The conductive ball 610 is illustrated in the embodiment to have a diameter corresponding to the step of the panel pad PP (ie, the height difference between the edge area EA and the central area CA).

[0081] refer to Figure 5 , the conductive ball 610 may be larger than Figure 4 The conductive ball 610 of the example embodiment, and Figure 5 The conductive ball 610 is shown to be larger than the height difference between the edge area EA and the central area CA. Figure 5 It is illustrated that the conductive ball 610 arranged at the central area CA of the panel pad PP contacts the connection pad CP.

[0082] refer to Figure 4 Example embodiments described or referenced Figure 5 The described exemplary embodiments are applicable.

[0083] In addition, there is no deliberate distinction between applications Figure 4 Situations and applications of example embodiments Figure 5 The exemplary embodiment of the present invention may be described below, and one of the two cases may be applied according to the size of the conductive balls 610 included in the anisotropic conductive film 600 or the gap between the panel pads PP and the connection pads CP.

[0084] In addition, although Figure 7 , Figure 8 , Fig.10 , Fig.12 and Fig.14 One or more conductive balls 610 may be shown. Figure 5 A similar approach corresponds to a panel pad PP, but in Figure 7 , Figure 8 , Fig.10 , Fig.12 and Fig.14 In the embodiment, the plurality of conductive balls 610 may be Figure 4 In a similar manner to FIG. 6 , the conductive balls 610 are connected to the connection pads CP and the panel pads PP through the conductive balls 610 arranged at the edge area EA of the panel pad PP.

[0085] The first extension wiring 172 is disposed on the insulating layer 140. The first extension wiring 172 may extend from one edge of the panel pad PP and may be connected to a signal line (eg, a data line 171) disposed in the display area DA of the display panel 100.

[0086] The second extension wiring 173 is arranged on the insulating layer 140 . The second extension wiring 173 extends from one edge of the panel pad PP and is connected to the test wiring 122 in the second opening 62 of the second insulating layer 142 .

[0087] In an embodiment, the panel pad PP, the first extension wiring 172, and the second extension wiring 173 may include at least one of titanium (Ti), copper (Cu), aluminum (Al), aluminum-neodymium (AlNd), aluminum-nickel-lanthanum (AlNiLa), indium tin oxide (ITO), and indium zinc oxide (IZO). According to an example embodiment, the panel pad PP, the first extension wiring 172, and the second extension wiring 173 may be arranged on the same layer as the data line 171 of the display area DA and / or the source / drain electrodes of the plurality of transistors, but are not limited thereto. For example, the first extension wiring 172 and the second extension wiring 173 may be arranged on the same layer as the gate electrode.

[0088] The organic layer 180 is arranged on the first extension wiring 172, the second extension wiring 173, and the insulating layer 140. The organic layer 180 includes a first organic layer 180a overlapping the first extension wiring 172 and a second organic layer 180b overlapping the second extension wiring 173. In a plan view, the first organic layer 180a and the second organic layer 180b are arranged near the panel pad PP in the second direction DR2 and extend in the first direction DR1. In a plan view, the first organic layer 180a and the second organic layer 180b may be separated or spaced apart from each other in the second direction DR2, with the panel pad PP between the first organic layer 180a and the second organic layer 180b. In an embodiment, the first organic layer 180a and the second organic layer 180b do not overlap with the recessed central area CA of the panel pad PP, and may overlap with a portion extending from the central area CA of the panel pad PP in the second direction DR2. In an embodiment, the first organic layer 180 a and the second organic layer 180 b are not disposed between adjacent panel pads PP, that is, are not disposed between central areas CA of adjacent panel pads PP disposed in the first direction DR1 .

[0089] Regarding the display device 10 according to the example embodiment, the edge area EA of the panel pad PP may not be covered by the organic layer 180, but may be exposed to the anisotropic conductive film (ACF) 600. In more detail, the edge area EA of the panel pad PP includes a first edge area EA and a second edge area EA facing each other with respect to the first direction DR1, the central area CA is between the first edge area EA and the second edge area EA, and the first edge area EA and the second edge area EA may not be covered by the organic layer 180, and may contact the anisotropic conductive film 600. Therefore, the contact area of ​​the panel pad PP in the first direction DR1 may be increased. In addition, the area in which the panel pad PP contacts the anisotropic conductive film 600 may be increased, thereby reducing the resistance generated by the electrical connection of the panel pad PP and the connection pad CP, and preventing or substantially preventing the anisotropic conductive film (ACF) 600 from being peeled off. The central area CA of the panel pad PP has a concave shape, so that when the organic layer 180 is not arranged between the adjacent panel pads PP, the adjacent panel pads PP may not be electrically connected to each other.

[0090] The flexible printed circuit board 500 includes a connection pad CP. The connection pad CP may be electrically connected to a reference Figure 1 and Figure 2 The data driver IC 550 is described. The connection pads CP may overlap the panel pads PP with an anisotropic conductive film (ACF) 600 therebetween. The connection pads CP may be electrically connected to the panel pads PP through the conductive balls 610 of the anisotropic conductive film 600.

[0091] Now refer to Figures 6 to 8 A display device according to example embodiments is described. Figure 6 FIG. 1 shows a display device according to an example embodiment. Figure 2 an enlarged top plan view of area "A"; Figure 7 Shows relative to Figure 6 A cross-sectional view of line VII-VII'; and Figure 8 Shows relative to Figure 6 Cross-sectional view along line VIII-VIII'. Figure 7 and Figure 8 A flexible printed circuit board 500 and an anisotropic conductive film (ACF) 600 are further illustrated together with the display panel 100 .

[0092] refer to Figures 6 to 8 , a display panel 100 of a display device 10 according to example embodiments includes a substrate 110 , a lower pattern 125 , an insulating layer 140 , a test wiring 122 , a panel pad PP, and an organic layer 180 .

[0093] The lower pattern 125 is arranged between the substrate 110 and the panel pad PP, and is arranged in the region of the first opening 61 in which the insulating layer 140 is arranged. In other words, the lower pattern 125 overlaps the central area CA of the panel pad PP. The lower pattern 125 may float and may not receive a voltage. One panel pad PP may overlap with a plurality of lower patterns 125, and the lower patterns 125 may be arranged in the second direction DR2, which is the direction in which the panel pad PP extends, and may be separated or spaced apart from each other. That is, the lower pattern 125 may include a first lower pattern 125 and a second lower pattern 125 arranged near each other in the second direction DR2.

[0094] In an embodiment, the width of the lower pattern 125 in the first direction DR1 in a plan view may be equal to or greater than 2 μm. In addition, in an embodiment, the width of the lower pattern 125 in the second direction DR2 in a plan view may be equal to or greater than 2 μm. In an embodiment, the lower pattern 125 may include at least one of molybdenum (Mo), titanium (Ti), copper (Cu), indium tin oxide (ITO), and indium zinc oxide (IZO). According to an example embodiment, the lower pattern 125 may be arranged on the same layer as the gate line 121 of the display area DA and the gate electrodes of the plurality of transistors, but is not limited thereto. For example, the lower pattern 125 may be arranged on the same layer as the source / drain electrode.

[0095] The central area CA of the panel pad PP is arranged on the substrate 110 and the lower pattern 125. The central area CA of the panel pad PP includes a protruding portion PPa arranged on the lower pattern 125 and protruding more than other portions. In other words, the protruding portion PPa of the panel pad PP overlaps the lower pattern 125. In an embodiment, the panel pad PP may include at least one of titanium (Ti), copper (Cu), aluminum (Al), aluminum-neodymium (AlNd), aluminum-nickel-lanthanum (AlNiLa), indium tin oxide (ITO), and indium zinc oxide (IZO). According to an example embodiment, the panel pad PP, the first extension wiring 172, and the second extension wiring 173 may be arranged on the same layer as the data line 171 of the display area DA and the source / drain electrodes of the plurality of transistors, but are not limited thereto.

[0096] The display panel 100 of the display device 10 according to the example embodiment includes a lower pattern 125 disposed under the panel pad PP, and the panel pad PP may include a protruding portion PPa. Therefore, the area in which the panel pad PP contacts the anisotropic conductive film (ACF) 600 may be further increased. In addition, Figure 7 and Figure 8 FIG. 4 shows that in an embodiment, the panel pad PP and the connection pad CP are electrically connected to each other through the conductive ball 610 arranged on the protruding portion PPa in the central area CA of the panel pad PP. Figure 4In a similar manner as described, in an embodiment, the panel pad PP and the connection pad CP may be electrically connected to each other through the conductive ball 610 disposed at the edge area EA of the panel pad PP.

[0097] Now refer to Fig. 9 and Fig.10 A display device according to example embodiments is described. Fig. 9 FIG. 1 shows a display device according to an example embodiment. Figure 2 an enlarged top plan view of area "A" of FIG. 1 ; and Fig.10 Shows relative to Fig. 9 Cross-sectional view along line XX'. Fig.10 A flexible printed circuit board 500 and an anisotropic conductive film (ACF) 600 are also illustrated together with the display panel 100 .

[0098] refer to Fig. 9 and Fig.10 , a display panel 100 of a display device 10 according to example embodiments includes a substrate 110 , a lower pattern 126 , an insulating layer 140 , a test wiring 122 , a panel pad PP, and an organic layer 180 .

[0099] The lower pattern 126 is arranged between the substrate 110 and the panel pad PP, and is arranged in the area of ​​the first opening 61 in which the insulating layer 140 is arranged. In other words, the lower pattern 126 overlaps the central area CA of the panel pad PP. The lower pattern 126 may float and may not receive a voltage. The lower pattern 126 may extend in the direction in which the panel pad PP extends. In an embodiment, one panel pad PP may overlap one lower pattern 126. In an embodiment, the width of the lower pattern 126 in the first direction DR1 in a plan view may be equal to or greater than 2μm. In addition, in an embodiment, the width of the lower pattern 126 in the second direction DR2 in a plan view may be equal to or greater than 2μm. According to an example embodiment, the lower pattern 126 may be arranged on the same layer as the gate line 121 of the display area DA and the gate electrodes of the plurality of transistors.

[0100] The central area CA of the panel pad PP is arranged on the substrate 110 and the lower pattern 126. In an embodiment, the central area CA of the panel pad PP includes a protruding portion PPa arranged on the lower pattern 126 and protruding more than other portions. In other words, the protruding portion PPa of the panel pad PP overlaps the lower pattern 126. According to an example embodiment, the panel pad PP, the first extension wiring 172 and the second extension wiring 173 may be arranged on the same layer as the data line 171 of the display area DA and the source / drain electrodes of the plurality of transistors, but are not limited thereto. In addition, Fig.10It is illustrated that in an embodiment, the panel pad PP and the connection pad CP are electrically connected to each other through the conductive ball 610 arranged at the central area CA of the panel pad PP and arranged on the upper side of the lower pattern 126. However, in an embodiment, the panel pad PP and the connection pad CP may be electrically connected to each other through the conductive ball 610 arranged at the central area CA of the panel pad PP and arranged on the upper side of the lower pattern 126. Figure 4 In a similar manner, the panels 10 and 11 are electrically connected to each other through conductive balls 610 arranged at the edge area EA of the panel pad PP.

[0101] Now refer to Fig.11 and Fig.12 A display device according to example embodiments is described. Fig.11 FIG. 1 shows a display device according to an example embodiment. Figure 2 an enlarged top plan view of area "A" of FIG. 1 ; and Fig.12 Shows about Fig.11 Cross-sectional view along line XII-XII'. Fig.12 A flexible printed circuit board 500 and an anisotropic conductive film (ACF) 600 are illustrated together with the display panel 100 .

[0102] refer to Fig.11 and Fig.12 , a display panel 100 of a display device 10 according to example embodiments includes a substrate 110 , a lower pattern 127 , an insulating layer 140 , a test wiring 122 , a panel pad PP, and an organic layer 180 .

[0103] The lower pattern 127 is arranged between the substrate 110 and the panel pad PP, and is arranged in the region of the first opening 61 in which the insulating layer 140 is arranged. In other words, the lower pattern 127 overlaps the central area CA of the panel pad PP. The lower pattern 127 may float and may not receive a voltage. In an embodiment, one panel pad PP may overlap with a plurality of lower patterns 127, and the lower patterns 127 may be arranged in the second direction DR2 and may be separated or spaced apart from each other. In addition, the lower pattern 127 may be arranged in the first direction DR1. That is, the lower pattern 127 may include a first lower pattern 127 and a second lower pattern 127 provided near each other in the first direction DR1. In an embodiment, the width of the lower pattern 127 in the first direction DR1 in a plan view may be equal to or greater than 2 μm. In addition, in an embodiment, the width of the lower pattern 127 in the second direction DR2 in a plan view may be equal to or greater than 2 μm. According to an example embodiment, the lower pattern 127 may be arranged on the same layer as the gate line 121 of the display area DA and the gate electrodes of the plurality of transistors.

[0104] The central area CA of the panel pad PP is arranged on the substrate 110 and the lower pattern 127. In an embodiment, the central area CA of the panel pad PP includes a protruding portion PPa arranged on the lower pattern 127 and protruding more than other portions. In other words, the protruding portion PPa of the panel pad PP overlaps the lower pattern 127. According to an example embodiment, the panel pad PP, the first extension wiring 172 and the second extension wiring 173 may be arranged on the same layer as the data line 171 of the display area DA and the source / drain electrodes of the plurality of transistors, but are not limited thereto. In addition, Fig.12 It is illustrated that in an embodiment, the panel pad PP and the connection pad CP are electrically connected to each other through the conductive ball 610 arranged at the central area CA of the panel pad PP and arranged on the upper portion of the lower pattern 127. However, in an embodiment, the panel pad PP and the connection pad CP may be electrically connected to each other through the conductive ball 610 arranged at the central area CA of the panel pad PP and on the upper portion of the lower pattern 127. Figure 4 In a similar manner, the panels 10 and 11 are electrically connected to each other through conductive balls 610 arranged at the edge area EA of the panel pad PP.

[0105] Now refer to Fig.13 and Fig.14 A display device according to example embodiments is described. Fig.13 FIG. 1 shows a display device according to an example embodiment. Figure 2 an enlarged top plan view of area "A" of FIG. 1 ; and Fig.14 Shows relative to Fig.13 Cross-sectional view along line XIV-XIV'. Fig.14 A flexible printed circuit board 500 and an anisotropic conductive film (ACF) 600 are illustrated together with the display panel 100 .

[0106] refer to Fig.13 and Fig.14 , a display panel 100 of a display device 10 according to example embodiments includes a substrate 110 , an insulating layer 140 , a test wiring 122 , a panel pad PP, and an organic layer 180 .

[0107] Regarding the display panel 100 of the display device 10 according to the example embodiment, the organic layer 180 is arranged around the corresponding panel pad PP (e.g., surrounds the corresponding panel pad PP). The organic layer 180 includes a first organic layer 180a overlapping the first extension wiring 172, a second organic layer 180b overlapping the second extension wiring 173, and a third organic layer 180c arranged between adjacent panel pads PP.

[0108] In an embodiment, the third organic layer 180c disposed between the panel pads PP disposed adjacent to each other in the first direction DR1 contacts the outer side of the panel pad PP and does not contact the top side of the panel pad PP. Therefore, the adjacent panel pads PP can be insulated, and the area in which the panel pad PP contacts the anisotropic conductive film (ACF) 600 can be increased. In addition, Fig.14 The panel pad PP and the connection pad CP are illustrated as being electrically connected to each other through the conductive ball 610 arranged at the central area CA of the panel pad PP in an embodiment. However, in an embodiment, the panel pad PP and the connection pad CP may be electrically connected to each other through the conductive ball 610 arranged at the central area CA of the panel pad PP. Figure 4 In a similar manner, the panels 10 and 11 are electrically connected to each other through conductive balls 610 arranged at the edge area EA of the panel pad PP.

[0109] While the disclosure has been described with respect to what are presently considered to be some implementable example embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A display device, comprising: substrate; an insulating layer on the substrate and including a first opening; a first panel pad on the substrate and the insulating layer; as well as an anisotropic conductive film on the first panel pad, The first panel pad comprises: a central region located in the center of the first opening, and a first edge region and a second edge region arranged along the outer side of the insulating layer and located on respective sides of the central region relative to the first direction, The anisotropic conductive film overlaps at least one of the central region, the first edge region, and the second edge region of the first panel pad, and The central area of ​​the first panel pad contacts at least a portion of the substrate through the first opening of the insulating layer.

2. The display device according to claim 1, further comprising: a second panel pad located adjacent to the first panel pad in the first direction; as well as an organic layer on the insulating layer, The organic layer includes a first organic layer and a second organic layer spaced apart from each other, and the first panel pad and the second panel pad are between the first organic layer and the second organic layer.

3. The display device according to claim 2, further comprising: a first lower pattern between the substrate and the central area of ​​the first panel pad, The first lower pattern is also arranged at a portion where the central area of ​​the substrate and the first panel pad do not contact each other.

4. The display device according to claim 3, further comprising: a second lower pattern between the substrate and the central area of ​​the first panel pad and spaced apart from the first lower pattern in a second direction crossing the first direction, The second lower pattern is further arranged at a portion where the central area of ​​the substrate and the first panel pad do not contact each other.

5. The display device according to claim 4, wherein: The central area of ​​the first panel pad includes a plurality of protrusions, and The protruding portion overlaps the first lower pattern and the second lower pattern.

6. The display device according to claim 3, wherein: The first lower pattern extends along the central area of ​​the first panel pad.

7. The display device according to claim 6, wherein: The central area of ​​the first panel pad includes a protruding portion, and The protruding portion overlaps the first lower pattern.

8. The display device according to claim 3, further comprising: a second lower pattern between the substrate and the central area of ​​the first panel pad and spaced apart from the first lower pattern in the first direction, The second lower pattern is further arranged at a portion where the central area of ​​the substrate and the first panel pad do not contact each other.

9. The display device according to claim 8, wherein: The central area of ​​the first panel pad includes a plurality of protrusions, and The protruding portion overlaps the first lower pattern and the second lower pattern.

10. The display device according to claim 1, further comprising: a second panel pad located adjacent to the first panel pad in the first direction; and an organic layer on the insulating layer, wherein the organic layer is between the first panel pad and the second panel pad, and The organic layer is not located on the first edge region and the second edge region of the first panel pad.

11. The display device according to claim 2, further comprising: a data line for applying a data voltage; as well as a first extension wiring extending from the first panel pad and electrically connected to the data line, The first extension wiring overlaps with the first organic layer.

12. The display device according to claim 11, further comprising: a second extension wiring extending from the first panel pad; as well as Test the wiring, wherein the insulating layer comprises a second opening exposing the test wiring, The second extension wiring is connected to the test wiring in the second opening, and The second extension wiring overlaps the second organic layer.

13. The display device according to claim 1, further comprising: A flexible printed circuit board including connection pads, The connection pad is electrically connected to the first panel pad through the anisotropic conductive film.

14. A display device comprising: A display panel including a first panel pad and an organic layer exposing the first panel pad; a flexible printed circuit board including connection pads; as well as an anisotropic conductive film between the display panel and the flexible printed circuit board, The first panel pad includes a concave central area and an edge area around the central area, The organic layer includes a first organic layer and a second organic layer spaced apart from each other, the first panel pad is between the first organic layer and the second organic layer, and The central area of ​​the first panel pad contacts at least a portion of a substrate of the display panel.

15. The display device according to claim 14, wherein: The display panel further includes an insulating layer between the substrate and the first panel pad, The insulating layer includes a first opening in a region corresponding to the central region of the first panel pad, and The central area of ​​the first panel pad contacts at least a portion of the substrate through the first opening of the insulating layer.

16. The display device according to claim 15, wherein: The display panel further includes a first lower pattern between the substrate and the central area of ​​the first panel pad, The first lower pattern is also arranged at a portion where the central area of ​​the substrate and the first panel pad do not contact each other.

17. The display device according to claim 16, wherein: The display panel further comprises: a second panel pad located adjacent to the first panel pad in a first direction; and a second lower pattern between the substrate and the central area of ​​the first panel pad and spaced apart from the first lower pattern in a second direction crossing the first direction, and The second lower pattern is further arranged at a portion where the central area of ​​the substrate and the first panel pad do not contact each other.

18. The display device according to claim 17, wherein: The width of the first lower pattern is equal to or greater than 2 μm.

19. The display device according to claim 16, wherein: The first lower pattern extends along the central area of ​​the first panel pad.

20. The display device according to claim 16, wherein: The display panel further comprises: a second panel pad located adjacent to the first panel pad in a first direction; and a second lower pattern between the substrate and the central area of ​​the first panel pad and spaced apart from the first lower pattern in the first direction, and The second lower pattern is further arranged at a portion where the central area of ​​the substrate and the first panel pad do not contact each other.

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