Display device

Abstract

A display device according to an embodiment includes a substrate including a display area for displaying an image and a non-display area located around the display area, a plurality of connecting lines located in the non-display area of ​​the substrate and connected to the display area of ​​the substrate, and a voltage transmission line located in the non-display area of ​​the substrate and transmitting a signal to the display area of ​​the substrate, wherein the voltage transmission line includes a first layer and a second layer that overlap each other along a first direction perpendicular to the surface of the substrate, wherein the first layer does not overlap with the plurality of connecting lines along the first direction, and the second layer may overlap with a portion of the plurality of connecting lines along the first direction.

Description

Technology Field

[0001] The present disclosure relates to a display device. Background Technology

[0002] Flat panel display devices include liquid crystal display (LCD), plasma display panel (PDP), organic light emitting diode device (OLED), field effect display (FED), electrophoretic display device, etc.

[0003] Meanwhile, efforts are being made to reduce the width of the non-display area located around the display area in order to increase the screen-to-body ratio of the display device—that is, the proportion of the screen occupied when viewing the display device from the front.

[0004] In addition, signal lines for transmitting signals to the display device may be damaged by static electricity that may occur during the manufacturing process of the display device. The problem to be solved

[0005] The embodiments are intended to provide a display device that can prevent damage caused by static electricity while reducing the width of the non-display area of ​​the display device.

[0006] It is evident that the purpose of the present invention is not limited to the aforementioned purpose and can be extended in various ways without departing from the spirit and scope of the invention. means of solving the problem

[0007] A display device according to an embodiment includes a substrate including a display area for displaying an image and a non-display area located around the display area, a plurality of connecting lines located in the non-display area of ​​the substrate and connected to the display area of ​​the substrate, and a voltage transmission line located in the non-display area of ​​the substrate and transmitting a signal to the display area of ​​the substrate, wherein the voltage transmission line includes a first layer and a second layer that overlap each other along a first direction perpendicular to the surface of the substrate, wherein the first layer does not overlap with the plurality of connecting lines along the first direction, and the second layer may overlap with a portion of the plurality of connecting lines along the first direction.

[0008] The above voltage transmission line may be positioned to surround the display area in the above non-display area.

[0009] The first layer of the above voltage transmission line may include a first part and a second part that are spaced apart from each other.

[0010] The second layer of the voltage transmission line may overlap with the first part and the second part that are spaced apart from each other along the first direction.

[0011] The width of the second layer of the voltage transmission line may be wider than the width of the first layer of the voltage transmission line.

[0012] The above display device may further include a semiconductor layer located in the display area, a gate electrode overlapping with the semiconductor layer, a source electrode and a drain electrode connected to the semiconductor layer, and a data line connected to the source electrode, and the plurality of connection lines may be made of the same layer as the gate electrode.

[0013] The first layer of the above voltage transmission line may be composed of layers such as the source electrode and the drain electrode.

[0014] The second layer of the above voltage transmission line may be composed of the same layer as the above data line.

[0015] The above display device may further include a first voltage transmission line that transmits a signal different from the voltage transmission line to the display area of ​​the substrate, which is located in the non-display area, and the first voltage transmission line may be formed in the same layer as the data line.

[0016] The first voltage transmission line may include a first sublayer composed of layers such as the source electrode and the drain electrode, and a second sublayer composed of layers such as the data line.

[0017] A display device according to one embodiment includes a substrate comprising a display area for displaying an image and a non-display area located around the display area, a plurality of connecting lines located in the non-display area of ​​the substrate and connected to the display area of ​​the substrate, and a voltage transmission line located in the non-display area of ​​the substrate and transmitting a signal to the display area of ​​the substrate, wherein the voltage transmission line may include a first area that does not overlap with the plurality of connecting lines along a first direction perpendicular to the surface of the substrate and a second area that overlaps with a portion of the plurality of connecting lines.

[0018] The above voltage transmission line includes a first layer and a second layer that overlap each other along a first direction perpendicular to the surface of the substrate, and the first region may include a first sub-region in which the first layer and the second layer overlap each other along the first direction and a second sub-region in which the first layer and the second layer do not overlap each other.

[0019] The above voltage transmission line includes a first layer and a second layer that overlap each other along a first direction perpendicular to the surface of the substrate, and the second layer may be located in the second region. Effects of the invention

[0020] According to the display device according to the embodiments, damage caused by static electricity can be prevented while reducing the width of the non-display area of ​​the display device.

[0021] It is evident that the effects of the present invention are not limited to the effects described above and can be extended in various ways without departing from the spirit and scope of the present invention. Brief explanation of the drawing

[0022] FIG. 1 is a plan view of a display device according to one embodiment. FIG. 2 is a plan view illustrating a part of a display device according to one embodiment. Figure 3 is a simplified cross-sectional view of a portion of Figure 1. FIGS. 4 to 6 are plan views sequentially illustrating the arrangement of signal lines in a part of FIG. 1. FIGS. 7 and FIGS. 8 are cross-sectional views conceptually illustrating a part of a display device according to an embodiment. FIG. 9 is a cross-sectional view illustrating a part of a display device according to another embodiment. FIG. 10 is a cross-sectional view illustrating a part of a display device according to another embodiment. FIG. 11 is a plan view of a display device according to another embodiment. FIG. 12 is a plan view illustrating a part of a display device according to another embodiment. FIG. 13 is a simplified cross-sectional view of the region (A) of FIG. 11. Specific details for implementing the invention

[0023] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0024] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0025] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0026] Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity.

[0027] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0028] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0029] Furthermore, throughout the specification, when the term "connected" is used, it does not mean only that two or more components are directly connected, but may also mean that two or more components are indirectly connected through other components, that they are connected not only physically but also electrically, or that they are a single unit although referred to by different names depending on their location or function.

[0030] Referring to FIG. 1, a display device according to one embodiment will be described. FIG. 1 is a plan view of a display device according to one embodiment.

[0031] Referring to FIG. 1, a display device (1000) according to the present embodiment includes a display area (DA) that displays an image and includes a plurality of pixels, and a non-display area (NDA) located at the outer edge of the display area (DA).

[0032] The non-display area (NDA) includes a driving area (PA) where a driving unit (600) that transmits a signal to the display area (DA) is located. For example, an external device such as a driving chip may be mounted in the driving area (PA), or it may be connected to an external device through a flexible circuit board.

[0033] A first voltage transmission line (400) and a second voltage transmission line (500) for transmitting a driving voltage are located in the non-display area (NDA). Pad electrodes electrically connected to an external device and a plurality of connecting lines connected thereto may be located in the non-display area (NDA). The plurality of connecting lines can receive data signals, scan signals, light emission signals, power supply voltage, touch sensing signals, etc. from the driving area (PA) and transmit them to the display area (DA). The plurality of connecting lines may be fan-out portions.

[0034] According to the illustrated embodiment, the first voltage transmission line (400) is formed to extend along the first direction (D1), and the second voltage transmission line (500) is formed to start from the driving unit (600) and surround the display area (DA) along the non-display area (NDA), but this is merely an example, and the arrangement of the first voltage transmission line (400) and the second voltage transmission line (500) is not limited thereto.

[0035] Although not shown, the driving area (PA) may be located on both sides along the second direction (D2).

[0036] Then, referring to FIG. 2, the second voltage transmission line (500) will be described. FIG. 2 is a layout diagram showing a part of a display device according to one embodiment.

[0037] Referring to FIG. 2 together with FIG. 1, the second voltage transmission line (500) has a shape that surrounds the display area (DA) along the non-display area (NDA) and includes a first layer (500a) and a second layer (500b) that overlap each other.

[0038] The first layer (500a) of the second voltage transmission line (500) can be divided into a first part (500a1) and a second part (500a2) that are spaced apart from each other and are not connected.

[0039] More specifically, the first end portion (50a) of the first part (500a1) and the second end portion (50b) of the second part (500a2) may be spaced apart from each other and positioned to face each other.

[0040] The first layer (500a) of the second voltage transmission line (500) can overlap with the second layer (500b) of the second voltage transmission line (500) and can be connected to each other through the first contact port (C1).

[0041] The width of the first layer (500a) of the second voltage transmission line (500) may be narrower than the width of the second layer (500b) of the second voltage transmission line (500).

[0042] Then, with reference to FIGS. 3 and FIGS. 4 to 6, together with FIGS. 1 and 2, the interlayer structure of the display area (DA) and non-display area (NDA) of a display device according to one embodiment will be described. FIG. 3 is a simplified cross-sectional view illustrating a cross-section of a part of FIG. 1. FIGS. 4 to 6 are plan views sequentially illustrating the arrangement of signal lines of a part of FIG. 1. FIG. 3 is a simplified cross-sectional view illustrating a cross-section of area (A) of FIG. 1.

[0043] As previously explained, the display device (1000) includes a display area (DA) and a non-display area (NDA).

[0044] A display device (1000) according to one embodiment includes a substrate (110), and the substrate (110) may be flexible. Although not illustrated, the substrate (110) may include a plurality of insulating films that overlap each other, and may further include a barrier film located between the overlapping insulating films.

[0045] A buffer layer (120) is positioned on the substrate (110). The buffer layer (120) may include a single film of an insulating film such as silicon nitride (SiNx) and silicon oxide (SiOx), or a plurality of multilayer films in which silicon nitride (SiNx) and silicon oxide (SiOx) are stacked. The buffer layer (120) prevents the penetration of unnecessary components such as impurities or moisture.

[0046] A first semiconductor layer (135) and a second semiconductor layer (136) are located on the buffer layer (120) of the display area (DA).

[0047] The first semiconductor layer (135) and the second semiconductor layer (136) may include polysilicon or oxide semiconductors. In this case, the oxide semiconductor may include any one of oxides based on titanium (Ti), hafnium (Hf), zirconium (Zr), aluminum (Al), tantalum (Ta), germanium (Ge), zinc (Zn), gallium (Ga), tin (Sn), or indium (In), or composite oxides thereof.

[0048] The first semiconductor layer (135) includes a first channel region (1355) and a first source region (1356) and a first drain region (1357) located on each side of the first channel region (1355). Similarly, the second semiconductor layer (136) includes a second channel region (1365) and a second source region (1366) and a second drain region (1367) located on each side of the second channel region (1365). The first channel region (1355) of the first semiconductor layer (135) and the second channel region (1365) of the second semiconductor layer (136) are regions that are not doped with impurities, and the first source region (1356) and the first drain region (1357) of the first semiconductor layer (135) and the second source region (1366) and the second drain region (1367) of the second semiconductor layer (136) may be regions doped with conductive impurities.

[0049] A first gate insulating film (140) is located on the first semiconductor layer (135) and the second semiconductor layer (136).

[0050] A first gate electrode (125) and a second gate electrode (126) are located on the first gate insulating film (140) of the display area (DA).

[0051] The first gate electrode (125) overlaps with the first channel region (1355), and the second gate electrode (126) overlaps with the second channel region (1365).

[0052] A plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) are located on the first gate insulating film (140) of the non-display area (NDA).

[0053] Multiple connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) extend along the second direction (D2) and may be bent in a direction inclined toward the first direction (D1) and the second direction (D2), and are spaced apart from each other.

[0054] A plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10), a first gate electrode (125), and a second gate electrode (126) can be formed together in the same layer. A plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10), a first gate electrode (125), and a second gate electrode (126) can be formed in a first metal layer.

[0055] The first metal layer may include molybdenum (Mo), aluminum (Al), copper (Cu), silver (Ag), chromium (Cr), tantalum (Ta), titanium (Ti), etc., and may be a single layer or a multilayer structure including the same. More specifically, the first metal layer may be a single layer made of molybdenum (Mo).

[0056] FIG. 4 illustrates a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) which are the first metal layer of the non-display area (NDA).

[0057] A second gate insulating film (142) is positioned over the first gate electrode (125) and the second gate electrode (126), and a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10).

[0058] The first gate insulating film (140) and the second gate insulating film (142) may be a single film comprising silicon oxide (SiOx) or silicon nitride (SiNx), or a multilayer film in which these are stacked.

[0059] A storage electrode (127) is located on the second gate insulating film (142) of the display area (DA).

[0060] A first interlayer insulating film (150) is positioned on the storage electrode (127). The first interlayer insulating film (150) may be a single film comprising silicon oxide (SiOx) or silicon nitride (SiNx), or a multilayer film in which these are stacked.

[0061] In the first gate insulating film (140), the second gate insulating film (142), and the first interlayer insulating film (150), a first contact hole (56) overlapping with the first source region (1356) of the first semiconductor layer (135), a second contact hole (57) overlapping with the first drain region (1357) of the first semiconductor layer (135), a third contact hole (66) overlapping with the second source region (1366) of the second semiconductor layer (136), and a fourth contact hole (67) overlapping with the second drain region (1367) of the second semiconductor layer (136) are formed.

[0062] A first source electrode (76), a first drain electrode (77), a second source electrode (86), and a second drain electrode (87) are located on the first interlayer insulating film (150) of the display area (DA).

[0063] The first source electrode (76) is connected to the first source region (1356) of the first semiconductor layer (135) through the first contact hole (56), the first drain electrode (77) is connected to the first drain region (1357) of the first semiconductor layer (135) through the second contact hole (57), the second source electrode (86) is connected to the second source region (1366) of the second semiconductor layer (136) through the third contact hole (66), and the second drain electrode (87) is connected to the second drain region (1367) of the second semiconductor layer (136) through the fourth contact hole (67). Although not illustrated, the first drain electrode (77) is connected to the second gate electrode (126).

[0064] On the first interlayer insulating film (150) of the non-display area (NDA), the first layer (400a) of the first voltage transmission line (400) and the first layer (500a) of the second voltage transmission line (500) are located.

[0065] The first layer (400a) of the first voltage transmission line (400) includes a portion extending in a first direction (D1) and a portion extending from thereto toward a driving area (PA), and the first layer (400a) of the first voltage transmission line (400) overlaps with some of the connecting lines (f) among the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110).

[0066] The first layer (500a) of the second voltage transmission line (500) does not overlap with a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) which is perpendicular to the surface of the substrate (110).

[0067] The first source electrode (76), the first drain electrode (77), the second source electrode (86), and the second drain electrode (87) of the display area (DA) can be formed together with the first layer (400a) of the first voltage transmission line (400) and the first layer (500a) of the second voltage transmission line (500) of the non-display area (NDA). The first source electrode (76), the first drain electrode (77), the second source electrode (86), the second drain electrode (87), the first layer (400a) of the first voltage transmission line (400), and the first layer (500a) of the second voltage transmission line (500) can be formed of a second metal layer.

[0068] The second metal layer may include aluminum (Al), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), chromium (Cr), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and / or copper (Cu), and may be a single layer or a multilayer structure including the same. For example, the second metal layer may be a triple layer structure including a lower layer made of titanium (Ti), an intermediate layer made of aluminum (Al), and an upper layer made of titanium (Ti).

[0069] FIG. 5 illustrates a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) which are a first metal layer of a non-display area (NDA), and a first layer (400a) of a first voltage transmission line (400) and a first layer (500a) of a second voltage transmission line (500) which are a second metal layer.

[0070] As previously explained, the first layer (400a) of the first voltage transmission line (400) overlaps with some of the connecting lines (f) among the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110), and the first layer (500a) of the second voltage transmission line (500) does not overlap with the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110).

[0071] As shown in FIG. 2, the first layer (500a) of the second voltage transmission line (500) can be divided into a first part (500a1) and a second part (500a2) that are spaced apart from each other and are not connected.

[0072] A second interlayer insulating film (160) is positioned on the first source electrode (76), the first drain electrode (77), the second source electrode (86), the second drain electrode (87), the first layer (400a) of the first voltage transmission line (400), and the first layer (500a) of the second voltage transmission line (500). The second interlayer insulating film (160) may contain an organic material and may be a flattening film with a nearly flat surface.

[0073] In the second interlayer insulating film (160) of the display area (DA), a fifth contact hole (71) overlapping with the first source electrode (76), a sixth contact hole (72) overlapping with the second source electrode (86), and a seventh contact hole (73) overlapping with the second drain electrode (87) are formed. In the first interlayer insulating film (150) and the second interlayer insulating film (160), an eighth contact hole (74) overlapping with the storage electrode (127) is formed. In the second interlayer insulating film (160) of the non-display area (NDA), an eighth contact hole (C1) overlapping with the first layer (500a) of the second voltage transmission line (500) and a ninth contact hole (C2) overlapping with the first layer (400a) of the first voltage transmission line (400) are formed.

[0074] A data line (171), a driving signal line (172), and an output member (173) are located on the second interlayer insulating film (160) of the display area (DA).

[0075] The data line (171) of the display area (DA) is connected to the first source electrode (76) through the fifth contact hole (71), the driving signal line (172) is connected to the second source electrode (86) through the sixth contact hole (72), and the storage electrode (127) is connected through the eighth contact hole (74). The output member (173) is connected to the second drain electrode (87) through the seventh contact hole (73).

[0076] On the second interlayer insulating film (160) of the non-display area (NDA), the second layer (400b) of the first voltage transmission line (400) and the second layer (500b) of the second voltage transmission line (500) are located.

[0077] The second layer (400b) of the first voltage transmission line (400) overlaps with the first layer (400a) of the first voltage transmission line (400) along the third direction (D3), and the second layer (500b) of the second voltage transmission line (500) overlaps with the first layer (500a) of the second voltage transmission line (500) along the third direction (D3).

[0078] The second layer (400b) of the first voltage transmission line (400) is connected to the first layer (400a) of the first voltage transmission line (400) through the ninth contact hole (C2), and the second layer (500b) of the second voltage transmission line (500) is connected to the first layer (500a) of the second voltage transmission line (500) through the eighth contact hole (C1).

[0079] The width of the second layer (500b) of the second voltage transmission line (500) may be wider than the width of the first layer (500a) of the second voltage transmission line (500).

[0080] The second layer (400b) of the first voltage transmission line (400) of the non-display area (NDA) and the second layer (500b) of the second voltage transmission line (500) can be simultaneously formed with the same layer as the data line (171), driving signal line (172), and output member (173) of the display area (DA).

[0081] The data line (171), the driving signal line (172), the output member (173), the second layer (400b) of the first voltage transmission line (400), and the second layer (500b) of the second voltage transmission line (500) may be composed of a third metal layer. The third metal layer may include aluminum (Al), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), chromium (Cr), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and / or copper (Cu), and may be a single layer or a multilayer structure including the same. For example, the third metal layer may be a triple-layer structure including a lower layer made of titanium (Ti), an intermediate layer made of aluminum (Al), and an upper layer made of titanium (Ti).

[0082] FIG. 6 illustrates a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) which are a first metal layer of a non-display area (NDA), a first layer (400a) of a first voltage transmission line (400) and a first layer (500a) of a second voltage transmission line (500) which are a second metal layer, and a second layer (400b) of a first voltage transmission line (400) and a second layer (500b) of a second voltage transmission line (500) which are a third metal layer.

[0083] The second layer (400b) of the first voltage transmission line (400) and the second layer (500b) of the second voltage transmission line (500) overlap with some of the connecting lines (f) of the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110).

[0084] A third interlayer insulating film (180) is positioned over the data line (171), driving signal line (172), and output member (173) of the display area (DA), and a first spacer part (SP1) forming a spacer (SP) is positioned in the non-display area (NDA).

[0085] The third interlayer insulating film (180) and the first spacer portion (SP1) may contain organic material and may be formed simultaneously as the same layer. The third interlayer insulating film (180) may be a flattening film with a nearly flat surface.

[0086] A pixel electrode (710) is located on the third interlayer insulating film (180) located in the display area (DA). The pixel electrode (710) is connected to an output member (173) through a ninth contact hole (81) formed in the third interlayer insulating film (180).

[0087] The pixel electrode (710) may be the anode electrode of an organic light-emitting device.

[0088] A pixel defining film (190) is positioned on the pixel electrode (710) of the display area (DA). The pixel defining film (190) has a pixel opening (195) that overlaps with the pixel electrode (710). The pixel opening (195) of the pixel defining film (190) is located in the display area (DA), and the pixel defining film (190) is primarily located in the display area.

[0089] A second spacer part (SP2) forming a spacer (SP) is located in the non-display area (NDA).

[0090] The pixel definition film (190) and the second spacer part (SP2) can be formed simultaneously in the same layer.

[0091] The pixel definition film (190) may include a resin such as polyacrylates or polyimides and a silica-based inorganic material, and may include a black pigment or / and a dye to absorb external light, thereby reducing the reflectance of external light and increasing the contrast ratio of the display device.

[0092] An organic light-emitting layer (720) is located in the pixel opening (195) of the pixel defining film (190) located in the display area (DA).

[0093] The organic light-emitting layer (720) may be a plurality of layers including one or more of a light-emitting layer, a hole-injection layer (HIL), a hole-transporting layer (HTL), an electron-transporting layer (ETL), and an electron-injection layer (EIL). When the organic light-emitting layer (720) includes all of these, the hole-injection layer may be located on the pixel electrode (710), which is the anode electrode, and the hole-transporting layer, light-emitting layer, electron-transporting layer, and electron-injection layer may be stacked sequentially thereon.

[0094] A common electrode (730) is located on the pixel defining layer (190) and the organic light-emitting layer (720). The common electrode (730) becomes the cathode electrode of the organic light-emitting device. Thus, the pixel electrode (710), the organic light-emitting layer (720), and the common electrode (730) form an organic light-emitting device (70).

[0095] The common electrode (730) is located on the front of the display area (DA) and extends to the non-display area (NDA) to contact the second layer (500b) of the second voltage transmission line (500) located in the non-display area (NDA), so that it can receive a common voltage from the second driving voltage transmission line (500).

[0096] A first semiconductor layer (135), a first gate electrode (125), a first source electrode (76), and a first drain electrode (77) form a first transistor, and a second semiconductor layer (136), a second gate electrode (126), a second source electrode (86), and a second drain electrode (87) form a second transistor. The first transistor may be a switching transistor, and the second transistor may be a driving transistor.

[0097] When a gate-on signal is applied to the first gate electrode (125) and a data signal from the data line (171) is applied to the first source electrode (76), the data signal is transmitted to the first drain electrode (77) and then to the second gate electrode (126). Additionally, the driving voltage applied to the driving signal line (172) is applied to the second source electrode (86), and a driving current corresponding to the second drain electrode (87) flows through the second channel region (1365) of the second semiconductor layer (136). The voltage applied to the second drain electrode (87) is transmitted to the pixel electrode (710) through the output member (173), and a common voltage is applied to the common electrode (730) through the voltage transmission line (500). The pixel electrode (710) is an anode, which is a hole injection electrode, and the common electrode (730) is a cathode, which is an electron injection electrode. Holes and electrons are injected into the organic light-emitting layer (720) from the pixel electrode (710) and the common electrode (730), respectively, and light is emitted when the exciton formed by the combination of the injected holes and electrons falls from the excited state to the ground state.

[0098] A capacitor (Cst) is connected between the second gate electrode (126) and the storage electrode (127). This capacitor (Cst) charges and maintains a data signal applied to the second gate electrode (126).

[0099] A sealing layer (80) is positioned on the common electrode (730) and the spacer (SP). The sealing layer (80) may be formed by alternately stacking one or more inorganic layers and one or more organic layers, and each of the inorganic layers or organic layers may be multiple.

[0100] In an illustrated embodiment, the encapsulation layer (80) includes a first inorganic encapsulation layer (810a) and a second inorganic encapsulation layer (810b), and includes an organic encapsulation layer (820) located between the first inorganic encapsulation layer (810a) and the second inorganic encapsulation layer (810b).

[0101] The first inorganic encapsulation layer (810a) and the second inorganic encapsulation layer (810b) are formed on the front surface of the substrate (110) and are also located on the spacer (SP), but the organic encapsulation layer (820) is not located on the outer edge of the spacer (SP) in the non-display area (NDA).

[0102] When forming the organic bag layer (820), the spacer (SP) can act as a dam to prevent the organic material for forming the organic bag layer (820) from overflowing, and since the organic material is formed so as not to overflow to the outer edge of the spacer (SP), the organic bag layer (820) can be formed so as not to be located on the outer edge of the spacer (SP).

[0103] The structure of the pixel located in the display area (DA) of the display device illustrated in FIG. 3 is merely an example, and the pixel structure of the display device according to an embodiment of the present invention is not limited to the structure illustrated in FIG. 2. Signal lines and organic light-emitting elements can be formed in various structures within a range that can be easily modified and implemented by a person skilled in the art. For example, FIG. 3 illustrates a display device comprising two thin film transistors (TFTs) and one capacitor, but the present invention is not limited thereto. Accordingly, the number of thin film transistors, the number of capacitors, and the number of wirings in the display device are not limited.

[0104] As previously explained, the first voltage transmission line (400) and the second voltage transmission line (500) located in the non-display area (NDA) include a first layer (400a, 500a) and a second layer (400b, 500b) that overlap each other with a second interlayer insulating film (160) in between along a third direction (D3) perpendicular to the surface of the substrate (110).

[0105] In this way, by forming the first voltage transmission line (400) and the second voltage transmission line (500) to include a first layer (400a, 500a) and a second layer (400b, 500b) that overlap each other along the third direction (D3), the width of the first voltage transmission line (400) and the second voltage transmission line (500) can be reduced while reducing the signal resistance.

[0106] By forming the first voltage transmission line (400) and the second voltage transmission line (500) to have a narrow width while reducing their signal resistance, the area of ​​the non-display area (NDA) where the first voltage transmission line (400) and the second voltage transmission line (500) are located can be reduced.

[0107] Then, referring to FIGS. 7 and FIGS. 8 together with FIGS. 1 to 6, the second voltage transmission line (500) of the display device (1000) according to the embodiment will be described in more detail. FIGS. 7 and FIGS. 8 are cross-sectional views conceptually illustrating a part of the display device according to the embodiment.

[0108] Referring to FIG. 7, electrostatic particles (e1) generated during the manufacturing process of a display device (1000) can move first (T1) along a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) to the first layer (500a) of the second voltage transmission line (500), and the electrostatic particles (e1) can move second (T2) to the second layer (500b) of the second voltage transmission line (500), thereby damaging the second voltage transmission line (500).

[0109] The first voltage transmission line (400) of the display device (1000) extends along the first direction (D1) so that static electricity can be removed through both ends, but the second voltage transmission line (500) has a shape that surrounds the display area (DA) along the non-display area (NDA), making it difficult to remove static electricity.

[0110] As previously explained, the first layer (400a) of the first voltage transmission line (400) overlaps with some of the connecting lines (f) among the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110), but the first layer (500a) of the second voltage transmission line (500) does not overlap with the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110). Additionally, the first layer (500a) of the second voltage transmission line (500) may be divided into a first part (500a1) and a second part (500a2) that are spaced apart from each other and are not connected, and the first end part (50a) of the first part (500a1) and the second end part (50b) of the second part (500a2) may be spaced apart from each other and arranged to face each other.

[0111] As such, the first layer (500a) of the second voltage transmission line (500), which is relatively close to the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3), does not overlap with the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10), and as shown in FIG. 8, it is difficult for electrostatic particles (e1) that can move along the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) to move to the first layer (500a) of the second voltage transmission line (500). Additionally, the first layer (500a) of the second voltage transmission line (500) is formed to be separated into a first part (500a1) and a second part (500a2) that are spaced apart from each other and are not connected, so that electrostatic particles (e1) that can move to the first layer (500a) of the second voltage transmission line (500) can be removed to the first end part (50a) of the first part (500a1) and the second end part (50b) of the second part (500a2), and can not move to the second layer (500b) of the second voltage transmission line (500).

[0112] By forming the second layer (500b) of the second voltage transmission line (500) to be wider than the width of the first layer (500a) of the second voltage transmission line (500) so as to overlap some of the connecting lines (f) among the multiple connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110), the signal resistance of the second voltage transmission line (500) can be reduced, and electrostatic particles (e1) that can move along the multiple connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) can be prevented from moving along the second voltage transmission line (500), thereby preventing damage to the second voltage transmission line (500) due to electrostatic charge.

[0113] Next, referring to FIG. 9, a display device according to another embodiment will be described. FIG. 9 is a cross-sectional view illustrating a part of a display device according to another embodiment.

[0114] Referring to FIG. 9, the display device according to the present embodiment is similar to the display device according to the previously described embodiment. A detailed description of identical components is omitted.

[0115] Unlike the display device according to the previously described embodiment, the first driving signal transmission line (400) of the display device according to the present embodiment may be composed of a single layer, and the first driving signal transmission line (400) may be composed of a third metal layer such as the data line (171) of the display area (DA), the driving signal line (172), and the second layer (500b) of the second voltage transmission line (500) of the non-display area (NDA).

[0116] Additionally, the first voltage transmission line (400) overlaps with some of the connecting lines (f) among the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110), but the first layer (500a) of the second voltage transmission line (500) does not overlap with the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) perpendicular to the surface of the substrate (110), and the second layer (500b) of the second voltage transmission line (500) overlaps with some of the connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) perpendicular to the surface of the substrate (110). It can overlap with connection lines (f).

[0117] Many of the features of the display device according to the embodiment described above with reference to FIGS. 1 to 8 are all applicable to the display device according to the present embodiment.

[0118] Next, with reference to FIG. 10, a display device according to another embodiment will be described. FIG. 10 is a cross-sectional view illustrating a part of a display device according to another embodiment.

[0119] Referring to FIG. 10, the display device according to the present embodiment is similar to the display device according to the previously described embodiment. A detailed description of identical components is omitted.

[0120] Unlike the display device according to the previously described embodiment, the first driving signal transmission line (400) of the display device according to the present embodiment may be composed of a single layer, and the first driving signal transmission line (400) may be composed of a second metal layer such as the first source electrode (76), the first drain electrode (77), the second source electrode (86), the second drain electrode (87) of the display area (DA), and the first layer (400a) of the first voltage transmission line (400) of the non-display area (NDA).

[0121] Additionally, the first voltage transmission line (400) overlaps with some of the connecting lines (f) among the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110), but the first layer (500a) of the second voltage transmission line (500) does not overlap with the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) perpendicular to the surface of the substrate (110), and the second layer (500b) of the second voltage transmission line (500) overlaps with some of the connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) perpendicular to the surface of the substrate (110). It can overlap with connection lines (f).

[0122] Many of the features of the display device according to the embodiment described above with reference to FIGS. 1 to 8 are all applicable to the display device according to the present embodiment.

[0123] Then, referring to FIGS. 11 to 13, a display device according to another embodiment will be described. FIG. 11 is a plan view of a display device according to another embodiment, FIG. 12 is a layout view showing a part of a display device according to another embodiment, and FIG. 13 is a cross-sectional view briefly showing a cross-section of area (A) of FIG. 11.

[0124] Referring to FIGS. 11 to 13, the display device according to the present embodiment is similar to the display device according to the embodiment described above with reference to FIGS. 1 to 6. A detailed description of identical components is omitted.

[0125] Referring to FIGS. 11 to 13, the display device (2000) according to the present embodiment includes a display area (DA) that includes a plurality of pixels and displays an image, and a non-display area (NDA) located at the outer edge of the display area (DA).

[0126] A first voltage transmission line (400) and a second voltage transmission line (500) for transmitting a driving voltage are located in the non-display area (NDA). Pad electrodes electrically connected to an external device and a plurality of connecting lines connected thereto may be located in the non-display area (NDA). The plurality of connecting lines can receive data signals, scan signals, light emission signals, power supply voltage, touch sensing signals, etc. from the driving area (PA) and transmit them to the display area (DA).

[0127] The second voltage transmission line (500) has a shape that surrounds the display area (DA) along the non-display area (NDA) and includes a first layer (500a) and a second layer (500b) that overlap each other.

[0128] The first layer (500a) of the second voltage transmission line (500) can be divided into a first part (500a1) and a second part (500a2) that are spaced apart from each other and are not connected.

[0129] More specifically, the first end portion (50a) of the first part (500a1) and the second end portion (50b) of the second part (500a2) may be spaced apart from each other and positioned to face each other.

[0130] The first layer (500a) of the second voltage transmission line (500) can overlap with the second layer (500b) of the second voltage transmission line (500) and can be connected to each other through the first contact port (C1).

[0131] The width of the first layer (500a) of the second voltage transmission line (500) may be narrower than the width of the second layer (500b) of the second voltage transmission line (500).

[0132] However, unlike the display device (1000) according to the embodiment described with reference to FIGS. 1 to 6, a hole (H) overlapping with an optical device may be formed in the non-display area (NDA) of the display device (2000) according to the present embodiment, and curved portions (n, n1, n2) of the second voltage transmission line (500) located in the non-display area (NDA) around the hole (H) may be included, and the width may be reduced in the curved portions (n, n1, n2), and thus, when electrostatic particles are transmitted to the narrow width portion of the second voltage transmission line (500) located around the hole (H), the second voltage transmission line (500) may be easily damaged by the electrostatic particles.

[0133] Additionally, a shorting bar (SB) may be located in the non-display area (NDA) of the display device (2000), but the shorting bar (SB) may be cut around the hole (H), and thus, a plurality of connecting lines adjacent to the curved parts (n, n1, n2) of the second voltage transmission line (500) cannot be connected to the shorting bar (SB), and static electricity can be transferred through the parts not connected to the shorting bar (SB).

[0134] However, the display device (2000) according to the present embodiment, like the display device (1000) described above with reference to FIGS. 1 to 6, includes a first voltage transmission line (400) and a second voltage transmission line (500) located in a non-display area (NDA), which overlap each other along a third direction (D3) perpendicular to the surface of the substrate (110) with a second interlayer insulating film (160) in between, and the first voltage transmission line (400) overlaps each other with some of the connecting lines (f) among a plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110), but the first layer (500a) of the second voltage transmission line (500) The second layer (500b) of the second voltage transmission line (500) may overlap with some of the connecting lines (f) of the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) perpendicular to the surface of the substrate (110) without overlapping with the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along the third direction (D3) perpendicular to the surface of the substrate (110).

[0135] Additionally, the first layer (500a) of the second voltage transmission line (500) is formed to be divided into a first part (500a1) and a second part (500a2) that are spaced apart from each other and are not connected, and the second layer (500b) of the second voltage transmission line (500) is formed to have a width wider than the width of the first layer (500a) of the second voltage transmission line (500) so as to overlap with some of the connecting lines (f) among the plurality of connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) along a third direction (D3) perpendicular to the surface of the substrate (110).

[0136] In this way, by forming the first voltage transmission line (400) and the second voltage transmission line (500) to include a first layer (400a, 500a) and a second layer (400b, 500b) that overlap each other along the third direction (D3), the width of the first voltage transmission line (400) and the second voltage transmission line (500) can be reduced while reducing the signal resistance.

[0137] By forming the first voltage transmission line (400) and the second voltage transmission line (500) to have a narrow width while reducing their signal resistance, the area of ​​the non-display area (NDA) where the first voltage transmission line (400) and the second voltage transmission line (500) are located can be reduced.

[0138] In addition, electrostatic particles movable along multiple connecting lines (f1, f2, f3, f4, f5, f6, f7, f8, f9, f10) can move along the second voltage transmission line (500), thereby preventing damage to the second voltage transmission line (500) in the relatively narrowed portion.

[0139] Many of the features of the display devices according to the embodiments described above with reference to FIGS. 1 to 10 are all applicable to the display device according to the present embodiment.

[0140] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0141] 1000, 2000: Display device 110: Substrate 120: Buffer layer 125, 126: Gate electrodes 127: Storage electrode 135, 136: Semiconductor layer 140, 142: Gate insulating film 150: Insulating layer 160, 180: Interlayer insulation film 171: Data line 172: Driving signal line 190: Pixel defining membrane 400: 1st voltage transmission line 500: 2nd voltage transmission line 400a, 500a: 1st layer 400b, 500b: 2nd layer 500a1: Part 1 500a2: Part 2 600: Driving unit 710: Pixel electrode 720: Organic light-emitting layer 730: Common electrode SP: Spacer f: Connection line

Claims

Claim 1 A display device comprising a substrate including a display area for displaying an image and a non-display area located around the display area, a plurality of connecting lines located in the non-display area of ​​the substrate and connected to the display area of ​​the substrate, and a voltage transmission line located in the non-display area of ​​the substrate and transmitting a signal to the display area of ​​the substrate, wherein the voltage transmission line includes a first layer and a second layer that overlap each other along a first direction perpendicular to the surface of the substrate, wherein the first layer does not overlap with the plurality of connecting lines along the first direction, and the second layer overlaps with a portion of the plurality of connecting lines along the first direction. Claim 2 In claim 1, the voltage transmission line is a display device positioned to surround the display area in the non-display area. Claim 3 In paragraph 2, the first layer of the voltage transmission line comprises a first portion and a second portion spaced apart from each other, forming a display device. Claim 4 In paragraph 3, the second layer of the voltage transmission line is a display device that overlaps with the first portion and the second portion, which are spaced apart from each other, along the first direction. Claim 5 In paragraph 4, a display device in which the width of the second layer of the voltage transmission line is wider than the width of the first layer of the voltage transmission line. Claim 6 A display device according to claim 1, further comprising a semiconductor layer located in the display area, a gate electrode overlapping with the semiconductor layer, a source electrode and a drain electrode connected to the semiconductor layer, and a data line connected to the source electrode, wherein the plurality of connecting lines are formed of the same layer as the gate electrode. Claim 7 In claim 6, the first layer of the voltage transmission line is a display device composed of the same layer as the source electrode and the drain electrode. Claim 8 In claim 7, the second layer of the voltage transmission line is a display device composed of the same layer as the data line. Claim 9 A display device according to claim 8, further comprising a first voltage transmission line located in the non-display area and transmitting a signal different from the voltage transmission line to the display area of ​​the substrate, wherein the first voltage transmission line is formed in the same layer as the data line. Claim 10 In claim 9, the first voltage transmission line comprises a first sublayer formed of a layer such as the source electrode and the drain electrode, and a second sublayer formed of a layer such as the data line. Claim 11 A substrate comprising a display area for displaying an image and a non-display area located around the display area; a plurality of connecting lines located in the non-display area of ​​the substrate and connected to the display area of ​​the substrate; and a voltage transmission line located in the non-display area of ​​the substrate and transmitting a signal to the display area of ​​the substrate, wherein the voltage transmission line comprises a first area that does not overlap with the plurality of connecting lines along a first direction perpendicular to the surface of the substrate and a second area that overlaps with a portion of the plurality of connecting lines, wherein the voltage transmission line comprises a first layer and a second layer that overlap each other along the first direction, and wherein the first layer does not overlap with the second area. Claim 12 In claim 11, the first region comprises a first sub-region in which the first layer and the second layer overlap each other along the first direction, and a second sub-region in which the first layer and the second layer do not overlap each other. Claim 13 In claim 11, a display device in which the second layer is located in the second region. Claim 14 In paragraph 13, the voltage transmission line is a display device positioned to surround the display area in the non-display area. Claim 15 In paragraph 14, the first layer of the voltage transmission line comprises a first portion and a second portion spaced apart from each other, forming a display device. Claim 16 In paragraph 15, the second layer of the voltage transmission line is a display device that overlaps with the first portion and the second portion that are spaced apart from each other along the first direction. Claim 17 In paragraph 16, a display device in which the width of the second layer of the voltage transmission line is wider than the width of the first layer of the voltage transmission line. Claim 18 A display device according to claim 11, further comprising a semiconductor layer located in the display area, a gate electrode overlapping with the semiconductor layer, a source electrode and a drain electrode connected to the semiconductor layer, and a data line connected to the source electrode, wherein the plurality of connecting lines are formed of the same layer as the gate electrode. Claim 19 In claim 18, the voltage transmission line comprises a first layer and a second layer that overlap each other along a first direction perpendicular to the surface of the substrate, and the first layer of the voltage transmission line is a layer such as the source electrode and the drain electrode, forming a display device. Claim 20 In paragraph 19, the second layer of the voltage transmission line is a display device composed of the same layer as the data line.

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