Display device

Abstract

The present disclosure relates to a display device, wherein a display device according to one embodiment comprises a substrate, a transistor located on the substrate, a first electrode connected to the transistor, a first protective film located between the transistor and the first electrode, a wiring located on the first protective film and overlapping with the first electrode, and a second protective film located between the wiring and the first electrode, wherein the wiring includes an opening pattern.

Description

Technology Field

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

[0002] A display device is a device that displays an image, and includes Liquid Crystal Displays (LCDs) and Organic Light Emitting Diodes (OLEDs). These display devices are used in a wide variety of electronic devices, such as mobile phones, navigation systems, digital cameras, e-books, portable game consoles, and various terminals.

[0003] Organic light-emitting displays (OLEDs) possess self-luminous characteristics and, unlike liquid crystal displays (LCDs), do not require a separate light source, allowing for reduced thickness and weight. Furthermore, OLEDs offer high-quality characteristics such as low power consumption, high brightness, and fast response speeds.

[0004] Such an organic light-emitting display device includes a plurality of pixels comprising organic light-emitting diodes, which are self-luminous elements, and each pixel is formed with a plurality of transistors and one or more capacitors for driving the organic light-emitting diodes. In addition, various wirings are formed to deliver a predetermined voltage to each pixel.

[0005] An insulating layer may be located between these wirings and the organic light-emitting diode. The insulating layer may contain organic materials, and gas may be generated within the insulating layer during the baking process of these organic materials. The generated gas may migrate to the upper surface of the insulating layer and be discharged. However, some of the gas may not be discharged because it is shielded by wiring or other components located on the insulating layer. If the gas remains in the insulating layer without being discharged to the outside, it may affect the electrodes, wiring, or light-emitting elements located on the insulating layer, leading to defects. The problem to be solved

[0006] The embodiments are intended to provide a display device capable of preventing defects from occurring due to the influence of electrodes, wiring, light-emitting elements, etc. located on the insulating layer by gas remaining inside the insulating layer. means of solving the problem

[0007] A display device according to one embodiment comprises a substrate, a transistor located on the substrate, a first electrode connected to the transistor, a first protective film located between the transistor and the first electrode, wiring located on the first protective film and overlapping with the first electrode, and a second protective film located between the wiring and the first electrode, wherein the wiring includes an opening pattern.

[0008] The first protective film may include an organic insulating material.

[0009] The second protective film may include an organic insulating material.

[0010] The opening pattern of the above wiring can overlap with the first electrode.

[0011] The opening pattern of the above wiring may be made of at least one of a circular, polygonal, or bar shape.

[0012] The above wiring is extended in a first direction, and the opening pattern of the wiring may be formed in a rod shape extending in the first direction.

[0013] The wiring is extended in a first direction, and the opening pattern of the wiring may be formed in a rod shape that is extended in a direction oblique to the first direction.

[0014] The above wiring may overlap with the area between the center and one edge of the first electrode.

[0015] The wiring above may be adjacent to one edge of the first electrode.

[0016] The above wiring can overlap with one edge of the first electrode.

[0017] One side of the above wiring may coincide with one edge of the first electrode.

[0018] The first electrode may include an opening pattern.

[0019] The first electrode is formed as a rectangle including two long sides extending in a first direction and two short sides extending in a second direction perpendicular to the first direction, and the opening pattern of the first electrode is formed as a rectangle including two short sides extending in the first direction and two long sides extending in the second direction, and the wiring may be extended in the first direction.

[0020] The opening pattern of the first electrode may be located at the center and one edge of the first electrode.

[0021] The above wiring can overlap with the opening pattern of the first electrode.

[0022] The opening pattern of the above wiring may overlap with the first electrode and may not overlap with the opening pattern of the first electrode.

[0023] It further includes a connecting electrode connecting the thin-film transistor and the first electrode, and the connecting electrode may be located on the same layer as the wiring.

[0024] A constant voltage is applied to the wiring, and the wiring can be connected to the transistor.

[0025] The above wiring includes a driving voltage line to which a driving voltage is applied and a data line to which a data signal is applied, the driving voltage line has a wider width than the data line, and the opening pattern may be formed on the driving voltage line.

[0026] The above wiring further includes an initial voltage line to which an initial voltage is applied, and a common voltage line to which a common voltage is applied, and the opening pattern may be formed on the initial voltage line and the common voltage line. Effects of the invention

[0027] According to the embodiments, defects in electrodes, wiring, light-emitting elements, etc. of a display device can be prevented. Brief explanation of the drawing

[0028] FIG. 1 is a cross-sectional view showing a display device according to one embodiment. FIG. 2 is a plan view showing a part of a layer of a display device according to one embodiment. FIGS. 3 and FIGS. 4 are plan views showing some layers of a display device according to one embodiment. FIGS. 5 to 8 are plan views showing some layers of a display device according to one embodiment. Figure 9 is a cross-sectional view along the line VIII-VIII' of Figure 8. FIG. 10 is a plan view showing some layers of a display device according to a reference example. Figure 11 is a cross-sectional view along the line XI-XI' of Figure 10. FIG. 12 is a circuit diagram of a pixel of a display device according to one embodiment. Specific details for implementing the invention

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] A display device according to one embodiment is described below with reference to FIG. 1.

[0036] FIG. 1 is a cross-sectional view showing a display device according to one embodiment.

[0037] As illustrated in FIG. 1, a display device according to one embodiment includes a substrate (110), a transistor (TFT) located on the substrate (110), and a light-emitting element (LED) connected to the transistor (TFT).

[0038] The substrate (110) may include at least one of polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, triacetate cellulose, and cellulose acetate propionate. The substrate (110) may include a flexible material that can be bent or folded, and may be single-layer or multi-layer.

[0039] A buffer layer (111) may be positioned on the substrate (110). The buffer layer (111) may have a single-layer or multi-layer structure. The buffer layer (111) may include an inorganic insulating material or an organic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy). The buffer layer (111) may be omitted in some cases. Additionally, a barrier layer may be positioned between the substrate (110) and the buffer layer (111). The barrier layer may have a single-layer or multi-layer structure. The barrier layer may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy).

[0040] A semiconductor (130) may be positioned on the buffer layer (111). The semiconductor (130) may include a first region (131), a channel (132), and a second region (133). The first region (131) and the second region (133) may be positioned on each side of the channel (132) of the semiconductor (130). The semiconductor (130) may include a semiconductor material such as amorphous silicon, polycrystalline silicon, oxide semiconductor, etc.

[0041] A first gate insulating film (141) may be positioned on the semiconductor (130). The first gate insulating film (141) may have a single layer or a multilayer structure. The first gate insulating film (141) may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy).

[0042] A first gate conductor including a gate electrode (151) may be positioned on the first gate insulating film (141). The gate electrode (151) may overlap with the channel (132) of the semiconductor (130). The gate electrode (151) may have a single-layer or multi-layer structure. The gate electrode (151) may include a metallic material such as molybdenum (Mo), aluminum (Al), copper (Cu), and / or titanium (Ti). After forming the gate electrode (151), a doping process or plasma treatment may be performed. The portion of the semiconductor (130) covered by the gate electrode (151) is not doped or plasma treated, and the portion of the semiconductor (130) not covered by the gate electrode (151) is doped or plasma treated to have the same characteristics as the conductor.

[0043] A second gate insulating film (142) may be positioned on the gate electrode (151). The second gate insulating film (142) may have a single-layer or multi-layer structure. The second gate insulating film (142) may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy).

[0044] A second gate conductor including a first holding electrode (153) may be positioned on the second gate insulating film (142). The first holding electrode (153) may have a single-layer or multi-layer structure. The first holding electrode (153) may include a metallic material such as molybdenum (Mo), aluminum (Al), copper (Cu), and / or titanium (Ti). The first holding electrode (153) may overlap with the gate electrode (151) to form a holding capacitor.

[0045] An interlayer insulating film (160) may be positioned on the first retaining electrode (153). The interlayer insulating film (160) may have a single-layer or multilayer structure. The interlayer insulating film (160) may include an inorganic insulating material or an organic insulating material.

[0046] A first data conductor including a source electrode (173) and a drain electrode (175) may be positioned on an interlayer insulating film (160). The source electrode (173) and the drain electrode (175) may have a single-layer or multi-layer structure. The source electrode (173) and the drain electrode (175) may include aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and / or copper (Cu), etc. For example, the source electrode (173) and the drain electrode (175) may include a lower layer, an intermediate layer, and an upper layer, wherein the intermediate layer may be made of aluminum (Al), and the lower layer and the upper layer may be made of titanium (Ti).

[0047] The interlayer insulating film (160) may include an opening that overlaps with the source electrode (173) and the first region (131) of the semiconductor (130). The source electrode (173) may be connected to the first region (131) of the semiconductor (130) through the opening of the interlayer insulating film (160). The interlayer insulating film (160) may include an opening that overlaps with the drain electrode (175) and the second region (133) of the semiconductor (130). The drain electrode (175) may be connected to the second region (133) of the semiconductor (130) through the opening of the interlayer insulating film (160).

[0048] A semiconductor (130), a gate electrode (151), a source electrode (173), and a drain electrode (175) constitute a single transistor (TFT). According to an embodiment, the transistor (TFT) may include only the source region and the drain region of the semiconductor (130) instead of the source electrode (173) and the drain electrode (175). Although a single transistor (TFT) is shown in FIG. 1, a display device according to one embodiment may include a plurality of pixels, and each pixel may include a plurality of transistors.

[0049] A first protective film (180) may be positioned over the source electrode (173) and the drain electrode (175). The first protective film (180) may include an organic insulating material such as a general-purpose polymer like polymethylmethacrylate (PMMA) or polystyrene (PS), a polymer derivative having a phenolic group, an acrylic polymer, an imide polymer, a polyimide, an acrylic polymer, or a siloxane polymer.

[0050] A second data conductor including a connecting electrode (510) may be positioned on the first protective layer (180). The first protective layer (180) may include an opening that overlaps the connecting electrode (510) and the drain electrode (175). The connecting electrode (510) may be connected to the drain electrode (175) through the opening of the first protective layer (180).

[0051] The second data conductor may further include a data line (171) and a driving voltage line (172). That is, the data line (171) and the driving voltage line (172) may be located on the same layer as the connecting electrode (510). At least some of the plurality of transistors included in each pixel may be connected to the data line (171), and other parts may be connected to the driving voltage line (172). The data line (171) is a wiring that transmits a data signal, and the brightness of the light-emitting element (LED) may change according to the data signal. The driving voltage line (172) is a wiring that transmits a driving voltage, and the driving voltage may be a constant voltage. The data line (171) and the driving voltage line (172) may extend in a direction parallel to each other on a plane. The driving voltage line (172) may have a relatively wider width compared to the data line (171). The driving voltage line (172) may include an opening pattern (600).

[0052] Although the city has been omitted, the second data conductor may further include an initial voltage line, a common voltage line, etc. The initial voltage line may transmit an initial voltage, and the common voltage line may transmit a common voltage. The initial voltage and the common voltage may each be a constant voltage. The initial voltage line, the common voltage line, etc. may extend in a direction parallel to the driving voltage line (172) on a plane. The initial voltage line, the common voltage line, etc. may include an opening pattern.

[0053] A second protective film (182) may be positioned over a second data conductor comprising a connecting electrode (510), a data line (171), and a driving voltage line (172). The second protective film (182) may include an organic insulating material such as a general-purpose polymer like polymethylmethacrylate (PMMA) or polystyrene (PS), a polymer derivative having a phenolic group, an acrylic polymer, an imide polymer, a polyimide, an acrylic polymer, or a siloxane polymer.

[0054] A first electrode (191) may be positioned on the second protective layer (182). The first electrode (191), also called an anode electrode, may be composed of a single layer or multiple layers including a transparent conductive oxide film or a metal material. The transparent conductive oxide film may include ITO (Indium Tin Oxide), poly-ITO, IZO (Indium Zinc Oxide), IGZO (Indium Gallium Zinc Oxide), and ITZO (Indium Tin Zinc Oxide), etc. The metal material may include silver (Ag), molybdenum (Mo), copper (Cu), gold (Au), and aluminum (Al), etc. For example, the first electrode (191) may include a lower layer, an intermediate layer, and an upper layer. The lower layer of the first electrode (191) may be positioned directly on the second protective layer (182), the intermediate layer may be positioned on the lower layer, and the upper layer may be positioned on the intermediate layer. At this time, the intermediate layer of the first electrode (191) may be made of a material different from the lower layer and the upper layer. For example, the intermediate layer may be made of silver (Ag), and the lower layer and the upper layer may be made of ITO.

[0055] The second protective layer (182) may include an opening (181) that overlaps with the connecting electrode (510) and the first electrode (191). The first electrode (191) may be connected to the connecting electrode (510) through the opening (181) of the second protective layer (182). The connecting electrode (510) may connect the drain electrode (175) and the first electrode (191). However, it is not limited thereto, and according to the embodiment, the drain electrode (175) and the first electrode (191) may be directly connected without a connecting electrode.

[0056] A partition wall (350) may be positioned over the first electrode (191). A pixel opening (351) is formed in the partition wall (350), and the pixel opening (351) of the partition wall (350) may overlap with the first electrode (191). The pixel opening (351) may overlap with the center of the first electrode (191). Thus, the partition wall (350) may be formed to cover the edge of the first electrode (191). The partition wall (350) may include an organic insulating material such as a general-purpose polymer like polymethylmethacrylate (PMMA) or polystyrene (PS), a polymer derivative having a phenolic group, an acrylic polymer, an imide polymer, a polyimide, an acrylic polymer, or a siloxane polymer.

[0057] A light-emitting layer (370) may be located within the pixel opening (351) of the partition wall (350). The light-emitting layer (370) may overlap with the first electrode (191). The light-emitting layer (370) may include an organic material that emits light such as red, green, or blue. The light-emitting layer (370) may include a low-molecular-weight or high-molecular-weight organic material. Although the light-emitting layer (370) is depicted as a single layer, in reality, auxiliary layers such as a hole injection layer (HIL), a hole transporting layer (HTL), an electron transporting layer (ETL), and an electron injection layer (EIL) may be located above and below the light-emitting layer (370). At this time, the hole injection layer and the hole transporting layer may be located below the light-emitting layer (370), and the electron transporting layer and the electron injection layer may be located above the light-emitting layer (370).

[0058] A second electrode (270) may be positioned on the light-emitting layer (370) and the partition (350). The second electrode (270) may include a reflective metal including calcium (Ca), barium (Ba), magnesium (Mg), aluminum (Al), silver (Ag), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), etc., or a transparent conductive oxide (TCO) such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0059] The first electrode (191), the light-emitting layer (370), and the second electrode (270) can form a light-emitting element (LED), wherein the first electrode (191) is an anode electrode which is a hole injection electrode, and the second electrode (270) is a cathode electrode which is an electron injection electrode. However, it is not limited thereto, and depending on the driving method of the display device, the anode electrode and the cathode electrode may be configured in the opposite way.

[0060] Holes and electrons are injected into the light-emitting layer (370) from the first electrode (191) and the second electrode (270), 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.

[0061] Although the city has been omitted, an encapsulation layer may be further positioned on the second electrode (270). The encapsulation layer is intended to protect the light-emitting diode (LED) from moisture or oxygen that may enter from the outside, and may include at least one inorganic film and at least one organic film. For example, the encapsulation layer may have a stacked shape comprising a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer. However, this is merely an example, and the number of inorganic and organic films constituting the encapsulation layer may be varied.

[0062] Hereinafter, with further reference to FIG. 2, the second data conductor, the planar shape of the first electrode, etc. of a display device according to one embodiment will be described.

[0063] FIG. 2 is a plan view showing a portion of a layer of a display device according to one embodiment. FIG. 2 shows a data line, a driving voltage line, and a first electrode of a display device according to one embodiment.

[0064] As illustrated in FIGS. 1 and 2, the first electrode (191) of a display device according to one embodiment may overlap with a data line (171) and a driving voltage line (172).

[0065] The first electrode (191) may be formed as a roughly polygonal shape in a plane, and the corners may have a shape that is chamfered with curves. For example, the first electrode (191) may be formed as a rectangle including two sides extending in a first direction (DR1) and two sides extending in a second direction (DR2) perpendicular to the first direction (DR1). In this case, the two sides extending in the first direction (DR1) may be long sides, and the two sides extending in the second direction (DR2) may be short sides. However, it is not limited thereto, and the first electrode (191) may be formed as a square, rhombus, circle, hexagon, etc. in a plane.

[0066] The data line (171) and the driving voltage line (172) may be extended in directions parallel to each other. For example, the data line (171) and the driving voltage line (172) may be extended along the first direction (DR1). That is, the data line (171) and the driving voltage line (172) may be extended in a direction parallel to one side of the first electrode (191). However, this is not limited thereto, and the data line (171) and the driving voltage line (172) may be extended in a direction oblique to one side of the first electrode (191).

[0067] The data line (171) may overlap with at least a portion of the first electrode (191). For example, the data line (171) may overlap with the left side of the first electrode (191). That is, the data line (171) may overlap with the area between the center and the left edge of the first electrode (191). However, the overlap location between the data line (171) and the first electrode (191) is not limited to this and can be changed in various ways. The data line (171) may have a width of approximately 1 μm or more and 7 μm or less, and this is merely one example, and the range of the width of the data line (171) is not limited to this. Although the data line (171) is depicted as having a constant width, it may have different widths. A portion of the data line (171) may have a relatively wide width.

[0068] The driving voltage line (172) may overlap with at least a portion of the first electrode (191). For example, the driving voltage line (172) may overlap with the right side of the first electrode (191). That is, the driving voltage line (172) may overlap with the area between the center and the right edge of the first electrode (191). However, the overlapping position of the driving voltage line (172) and the first electrode (191) is not limited to this and can be varied. For example, the driving voltage line (172) may overlap with the left side of the first electrode (191), and the data line (171) may overlap with the right side of the first electrode (191). The driving voltage line (172) may have a width of approximately 4 μm or more and 12 μm or less, and this is merely one example, and the range of the width of the driving voltage line (172) is not limited to this. The driving voltage line (172) may have different widths depending on the position. Some areas of the driving voltage line (172) may have a relatively wide width.

[0069] The driving voltage line (172) may include an opening pattern (600). The opening pattern (600) may be formed in a portion of the driving voltage line (172) where the width is relatively wide. If the opening pattern (600) is formed in a portion of the driving voltage line (172) where the width is relatively narrow, there is a risk that the driving voltage line (172) may be disconnected. By forming the opening pattern (600) in a portion of the driving voltage line (172) where the width is relatively wide, the failure of the driving voltage line (172) to disconnect can be prevented. The opening pattern (600) may be formed in a circular shape on a plane. However, the shape of the opening pattern (600) is not limited thereto, and various shapes of the opening pattern (600) will be described below with reference to FIGS. 3 and FIGS. 4.

[0070] FIGS. 3 and 4 are plan views showing some layers of a display device according to one embodiment. FIGS. 3 and 4 show a data line, a driving voltage line, and a first electrode of a display device according to one embodiment.

[0071] As illustrated in FIG. 3, the opening pattern (600) of the driving voltage line (172) may be formed in a rod shape. The opening pattern (600) may be formed in a rod shape extending approximately in the first direction (DR1). That is, the extension direction of the opening pattern (600) may be substantially the same as the extension direction of the driving voltage line (172).

[0072] As illustrated in FIG. 4, the opening pattern (600) of the driving voltage line (172) may be formed in a rod shape extending in an oblique direction with respect to the first direction (DR1). The angle at which the opening pattern (600) is tilted with respect to the first direction (DR1) can be varied. Although the opening pattern (600) is shown as being tilted counterclockwise with respect to the first direction (DR1), it is not limited thereto, and the opening pattern (600) may be tilted clockwise with respect to the first direction (DR1).

[0073] The planar shape of the opening pattern (600) can be varied in many ways in addition to the shape shown in FIGS. 2 to 4. For example, the opening pattern (600) can be made of an ellipse, a dot pattern, a polygon, a zigzag pattern, a wave pattern, etc.

[0074] Although the number of opening patterns (600) overlapping with the first electrode (191) is shown as two, it is not limited thereto. The number of opening patterns (600) overlapping with the first electrode (191) may be one, three or more, and may be varied in many ways.

[0075] In a display device according to one embodiment, the planar shape of the first electrode, the overlapping position of the second data conductor and the first electrode, etc., may be varied. Hereinafter, various variations of the second data conductor and the first electrode of a display device according to one embodiment will be described with reference to FIGS. 5 to 8.

[0076] FIGS. 5 to 8 are plan views showing some layers of a display device according to one embodiment. FIGS. 5 to 8 show a data line, a driving voltage line, and a first electrode of a display device according to one embodiment.

[0077] As illustrated in FIG. 5, the first electrode (191) may include an opening pattern (195). The overall planar shape of the first electrode (191) may be approximately rectangular, as in the preceding embodiment, and an opening pattern (195) may be formed in which a portion of the first electrode (191) is removed. The opening pattern (195) may be approximately rectangular in a planar shape. For example, the opening pattern (195) of the first electrode (191) may be a rectangle comprising two sides extending in a first direction (DR1) and two sides extending in a second direction (DR2) perpendicular to the first direction (DR1). In this case, the two sides extending in the first direction (DR1) may be short sides, and the two sides extending in the second direction (DR2) may be long sides. The opening pattern (195) may be located in the center and left side of the first electrode (191). However, the shape and position of the opening pattern (195) are not limited to this and can be changed in various ways.

[0078] The data line (171) may overlap with at least a portion of the first electrode (191). For example, the data line (171) may overlap with the left side of the first electrode (191). In this case, the data line (171) may be positioned adjacent to the left edge of the first electrode (191). In some cases, the data line (171) may overlap with the left edge of the first electrode (191). Additionally, one side of the data line (171) may coincide with the left edge of the first electrode (191). The data line (171) may overlap with the opening pattern (195) of the first electrode (191).

[0079] The driving voltage line (172) may overlap with at least a portion of the first electrode (191). For example, the driving voltage line (172) may overlap with the right side of the first electrode (191). In this case, the driving voltage line (172) may be positioned adjacent to the right edge of the first electrode (191). In some cases, the driving voltage line (172) may overlap with the right edge of the first electrode (191). Additionally, one side of the driving voltage line (172) may coincide with the right edge of the first electrode (191). The driving voltage line (172) may include an opening pattern (600), and the opening pattern (600) of the driving voltage line (172) may overlap with the first electrode (191). The driving voltage line (172) may not overlap with the opening pattern (195) of the first electrode (191). The opening pattern (600) of the driving voltage line (172) may not overlap with the opening pattern (195) of the first electrode (191). However, this is not limited thereto, and the driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191), or the opening pattern (600) of the driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191).

[0080] As shown in FIG. 6, the first electrode (191) may include an opening pattern (195), and the data line (171) and the driving voltage line (172) may overlap with the first electrode (191).

[0081] The data line (171) may overlap with the right side of the first electrode (191). In this case, the data line (171) may be positioned adjacent to the right edge of the first electrode (191). In some cases, the data line (171) may overlap with the right edge of the first electrode (191). Additionally, one side of the data line (171) may coincide with the right edge of the first electrode (191). The data line (171) may not overlap with the opening pattern (195) of the first electrode (191).

[0082] The driving voltage line (172) may overlap with the left side of the first electrode (191). At this time, the driving voltage line (172) may be positioned adjacent to the left edge of the first electrode (191). In some cases, the driving voltage line (172) may overlap with the left edge of the first electrode (191). Additionally, one side of the driving voltage line (172) may coincide with the left edge of the first electrode (191). The driving voltage line (172) may include an opening pattern (600), and the opening pattern (600) of the driving voltage line (172) may overlap with the first electrode (191). The driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191). The opening pattern (600) of the driving voltage line (172) may not overlap with the opening pattern (195) of the first electrode (191). However, it is not limited to this, and the opening pattern (600) of the driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191).

[0083] As illustrated in FIG. 7, the first electrode (191) may include an opening pattern (195), and the data line (171) and the driving voltage line (172) may overlap with the first electrode (191).

[0084] The overall planar shape of the first electrode (191) may be approximately rectangular, and the planar shape of the opening pattern (195) of the first electrode (191) may be approximately rectangular. The opening pattern (195) may be located at the center and right side of the first electrode (191). However, the shape and location of the opening pattern (195) are not limited thereto and may be changed in various ways.

[0085] The data line (171) may overlap with the right side of the first electrode (191). In this case, the data line (171) may be positioned adjacent to the right edge of the first electrode (191). In some cases, the data line (171) may overlap with the right edge of the first electrode (191). Additionally, one side of the data line (171) may coincide with the right edge of the first electrode (191). The data line (171) may overlap with the opening pattern (195) of the first electrode (191).

[0086] The driving voltage line (172) may overlap with the left side of the first electrode (191). At this time, the driving voltage line (172) may be positioned adjacent to the left edge of the first electrode (191). In some cases, the driving voltage line (172) may overlap with the left edge of the first electrode (191). Additionally, one side of the driving voltage line (172) may coincide with the left edge of the first electrode (191). The driving voltage line (172) may include an opening pattern (600), and the opening pattern (600) of the driving voltage line (172) may overlap with the first electrode (191). The driving voltage line (172) may not overlap with the opening pattern (195) of the first electrode (191). The opening pattern (600) of the driving voltage line (172) may not overlap with the opening pattern (195) of the first electrode (191). However, it is not limited thereto, and the driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191), and the opening pattern (600) of the driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191).

[0087] As shown in FIG. 8, the first electrode (191) may include an opening pattern (195), and the data line (171) and the driving voltage line (172) may overlap with the first electrode (191).

[0088] The data line (171) may overlap with the left side of the first electrode (191). In this case, the data line (171) may be positioned adjacent to the left edge of the first electrode (191). In some cases, the data line (171) may overlap with the left edge of the first electrode (191). Additionally, one side of the data line (171) may coincide with the left edge of the first electrode (191). The data line (171) may not overlap with the opening pattern (195) of the first electrode (191).

[0089] The driving voltage line (172) may overlap with the right side of the first electrode (191). In this case, the driving voltage line (172) may be positioned adjacent to the right edge of the first electrode (191). In some cases, the driving voltage line (172) may overlap with the right edge of the first electrode (191). Additionally, one side of the driving voltage line (172) may coincide with the right edge of the first electrode (191). The driving voltage line (172) may include an opening pattern (600), and the opening pattern (600) of the driving voltage line (172) may overlap with the first electrode (191). The driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191). The opening pattern (600) of the driving voltage line (172) may not overlap with the opening pattern (195) of the first electrode (191). However, it is not limited to this, and the opening pattern (600) of the driving voltage line (172) may overlap with the opening pattern (195) of the first electrode (191).

[0090] As previously discussed, the second data conductor, including data lines and driving voltage lines, and the first electrode may overlap each other. The second data conductor may include an opening pattern, and the first electrode may include an opening pattern. In this case, the ratio of the opening pattern of the second data conductor and the opening pattern of the first electrode to the total area of ​​the second data conductor and the first electrode may be approximately 27.2% or more. The ratio of the opening pattern can be varied, and when the ratio of the opening pattern is approximately 27.2% or more, the gas remaining inside the insulating layer can be effectively discharged. As the ratio of the opening pattern increases, it may be more advantageous in terms of the effect of gas discharge, but disadvantageous in terms of the resistance of the wiring. Therefore, the ratio of the opening pattern can be appropriately selected by considering the effect of gas discharge and resistance.

[0091] As shown in FIGS. 5 to 8, the case where the first electrode includes an opening pattern may be relatively more advantageous in terms of the effect of gas exhaust compared to the case where the first electrode does not include an opening pattern as shown in FIGS. 3 and 4. Additionally, as shown in FIGS. 6 and 8, the case where a relatively wide wiring is designed to overlap with the opening pattern of the first electrode may be relatively more advantageous in terms of the effect of gas exhaust compared to the case where a relatively wide wiring does not overlap with the opening pattern of the first electrode as shown in FIGS. 5 and 7.

[0092] Hereinafter, a display device according to a reference example and a display device according to one embodiment will be compared and explained with reference to FIG. 8 and FIG. 9 to 11.

[0093] FIG. 9 is a cross-sectional view along the line VIII-VIII' of FIG. 8, FIG. 10 is a plan view showing a part of a layer of a display device according to a reference example, and FIG. 11 is a cross-sectional view along the line XI-XI' of FIG. 10.

[0094] As illustrated in FIGS. 8 and 9, in a display device according to one embodiment, a first protective film (180) may be located below a second data conductor including a data line (171) and a driving voltage line (172), and a second protective film (182) may be located between the second data conductor and the first electrode (191). The first protective film (180) and the second protective film (182) may include an organic insulating material, and gas may be generated inside the first protective film (180) and the second protective film (182) during the manufacturing process. The generated gas may be moved to the upper surface of the first protective film (180) and the second protective film (182) and discharged, and some of the gas may remain inside the first protective film (180) and the second protective film (182) without being discharged because it is shielded by the second data conductor and the first electrode (191).

[0095] In a display device according to one embodiment, an opening pattern (600) may be formed on a second data conductor, and an opening pattern (195) may be formed on a first electrode (191). In some cases, the opening pattern (195) of the first electrode (191) may be omitted. The opening pattern (600) of the second data conductor can reduce the movement path of gas generated inside the first protective film (180) to allow the gas to be discharged smoothly. Additionally, the opening pattern (195) of the first electrode (191) can reduce the movement path of gas generated inside the first protective film (180) and the second protective film (182) to allow the gas to be discharged smoothly.

[0096] Although the opening pattern (600) is shown as being formed on the driving voltage line (172) among the second data conductors, it is not limited thereto. The second data conductor may include various wirings in addition to the driving voltage line (172), and the opening pattern may be formed on other wirings as well. For example, the data line (171), the initialization voltage line, the common voltage line, etc. may include the opening pattern.

[0097] As illustrated in FIGS. 10 and 11, in a display device according to the reference example, a first protective film (180) may be located below a second data conductor including a data line (171) and a driving voltage line (172), and a second protective film (182) may be located between the second data conductor and the first electrode (191).

[0098] In the display device according to the reference example, no opening pattern is formed in the second data conductor, and no opening pattern is formed in the first electrode (191). In the case of the driving voltage line (172) among the second data conductors, it may have a relatively wide width. Therefore, gas generated inside the first protective film (180) may be shielded by the driving voltage line (172) and not discharged to the outside. The movement path of the gas is extended by the driving voltage line (172) having a wide width, and since the first electrode (191) overlapping with the driving voltage line (172) has an even wider width, the movement path of the gas is extended further. The movement path of the gas may be extended not only by the driving voltage line (172) but also by other wiring included in the second data conductor. Accordingly, gas generated inside the first protective layer (180) and the second protective layer (182) is shielded by the second data conductor and the first electrode (191), and remains in the first protective layer (180) and the second protective layer (182) and may affect other components.

[0099] In a display device according to one embodiment, as described above, the opening pattern (600) of the second data conductor and the opening pattern (195) of the first electrode (191) reduce the path of gas movement so that it can be smoothly discharged, thereby reducing the amount of gas remaining in the first protective film (180) and the second protective film (182) and preventing it from affecting other elements.

[0100] Although a single transistor included in each pixel was described in FIG. 1, as previously mentioned, each pixel may include multiple transistors. Below, with reference to FIG. 12, an example of a pixel of a display device according to one embodiment will be described.

[0101] FIG. 12 is a circuit diagram of a pixel of a display device according to one embodiment.

[0102] As illustrated in FIG. 12, a display device according to one embodiment includes a plurality of pixels (PX) capable of displaying an image and a plurality of signal lines (127, 150, 152, 154, 171, 172). A single pixel (PX) may include a plurality of transistors (T1, T2, T3, T4, T5, T6, T7), a capacitor (Cst), and at least one light-emitting diode (LED) connected to the plurality of signal lines (127, 150, 152, 154, 171, 172). In this embodiment, an example in which a single pixel (PX) includes a single light-emitting diode (LED) is mainly described.

[0103] The signal lines (127, 150, 152, 154, 155, 171, 172) may include an initialization voltage line (127), a plurality of scan lines (150, 152, 154), a light emission control line (155), a data line (171), and a driving voltage line (172). At least some of these signal lines (127, 150, 152, 154, 155, 171, 172) may be made of a second data conductor as previously described. For example, the initialization voltage line (127), the data line (171), the driving voltage line (172), etc. may be made of a second data conductor. The initialization voltage line (127) may transmit an initialization voltage (Vint). A plurality of scan lines (150, 152, 154) can each transmit a scan signal (GWn, GIn, GI(n+1)). The scan signal (GWn, GIn, GI(n+1)) can transmit a gate-on voltage and a gate-off voltage that can turn on / turn off the transistors (T2, T3, T4, T7) included in the pixel (PX).

[0104] Scan lines (150, 152, 154) connected to a pixel (PX) may include a first scan line (150) capable of transmitting a scan signal (GWn), a second scan line (152) capable of transmitting a scan signal (GIn) having a gate-on voltage at a timing different from that of the first scan line (150), and a third scan line (154) capable of transmitting a scan signal (GI(n+1)). In this embodiment, an example in which the second scan line (152) transmits a gate-on voltage at a timing earlier than that of the first scan line (150) is mainly described. For example, if the scan signal (GWn) is the nth scan signal (Sn) (n is a natural number greater than or equal to 1) among the scan signals applied during one frame, the scan signal (GIn) may be a preceding scan signal such as the (n-1)th scan signal (S(n-1)), and the scan signal (GI(n+1)) may be the nth scan signal (Sn). However, the present embodiment is not limited thereto, and the scan signal (GI(n+1)) may be a scan signal different from the nth scan signal (Sn).

[0105] The light emission control line (155) can transmit a control signal, and in particular, can transmit a light emission control signal (EM) that can control the light emission of a light-emitting diode (LED) included in a pixel (PX). The control signal transmitted by the light emission control line (155) can transmit a gate-on voltage and a gate-off voltage, and can have a waveform different from the scan signal transmitted by the scan lines (150, 152, 154).

[0106] The data line (171) can transmit a data signal (Dm), and the driving voltage line (172) can transmit a driving voltage (ELVDD). The data signal (Dm) may have different voltage levels depending on the video signal input to the display device, and the driving voltage (ELVDD) may have a substantially constant level.

[0107] Although not illustrated, the display device may further include a driving unit that transmits signals to a plurality of signal lines (127, 150, 152, 154, 171, 172).

[0108] A plurality of transistors (T1, T2, T3, T4, T5, T6, T7) included in a pixel (PX) may include a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a fifth transistor (T5), a sixth transistor (T6), and a seventh transistor (T7).

[0109] The first scan line (150) can transmit a scan signal (GWn) to the second transistor (T2) and the third transistor (T3), the second scan line (152) can transmit a scan signal (GIn) to the fourth transistor (T4), the third scan line (154) can transmit a scan signal (GI(n+1)) to the seventh transistor (T7), and the light emission control line (155) can transmit a light emission control signal (EM) to the fifth transistor (T5) and the sixth transistor (T6).

[0110] The gate electrode (G1) of the first transistor (T1) is connected to one end of the capacitor (Cst) through the driving gate node (GN), the first electrode (Ea1) of the first transistor (T1) is connected to the driving voltage line (172) via the fifth transistor (T5), and the second electrode (Eb1) of the first transistor (T1) is connected to the anode of the light-emitting diode (LED) via the sixth transistor (T6). The first transistor (T1) can receive a data signal (Dm) transmitted by the data line (171) according to the switching operation of the second transistor (T2) and supply a driving current (Id) to the light-emitting diode (LED).

[0111] The gate electrode (G2) of the second transistor (T2) is connected to the first scan line (150), the first electrode (Ea2) of the second transistor (T2) is connected to the data line (171), and the second electrode (Eb2) of the second transistor (T2) is connected to the first electrode (Ea1) of the first transistor (T1) and is connected to the driving voltage line (172) via the fifth transistor (T5). The second transistor (T2) is turned on according to the scan signal (GWn) received through the first scan line (150) and can transmit the data signal (Dm) transmitted from the data line (171) to the first electrode (Ea1) of the first transistor (T1).

[0112] The gate electrode (G3) of the third transistor (T3) is connected to the first scan line (150), and the first electrode (Ea3) of the third transistor (T3) is connected to the second electrode (Eb1) of the first transistor (T1) and is connected to the anode of the light-emitting diode (LED) via the sixth transistor (T6). The second electrode (Eb3) of the third transistor (T3) is connected to the second electrode (Eb4) of the fourth transistor (T4), one end of the capacitor (Cst), and the gate electrode (G1) of the first transistor (T1). The third transistor (T3) is turned on according to the scan signal (GWn) received through the first scan line (150) to connect the gate electrode (G1) of the first transistor (T1) and the second electrode (Eb1) to each other, thereby allowing the first transistor (T1) to be diode-connected.

[0113] The gate electrode (G4) of the fourth transistor (T4) is connected to the second scan line (152), the first electrode (Ea4) of the fourth transistor (T4) is connected to the initialization voltage (Vint) terminal, and the second electrode (Eb4) of the fourth transistor (T4) is connected to one end of the capacitor (Cst) and the gate electrode (G1) of the first transistor (T1) via the second electrode (Eb3) of the third transistor (T3). The fourth transistor (T4) can be turned on according to the scan signal (GIn) received through the second scan line (152) to transmit the initialization voltage (Vint) to the gate electrode (G1) of the first transistor (T1) and perform an initialization operation to initialize the voltage of the gate electrode (G1) of the first transistor (T1).

[0114] The gate electrode (G5) of the fifth transistor (T5) is connected to the light emission control line (155), the first electrode (Ea5) of the fifth transistor (T5) is connected to the driving voltage line (172), and the second electrode (Eb5) of the fifth transistor (T5) is connected to the first electrode (Ea1) of the first transistor (T1) and the second electrode (Eb2) of the second transistor (T2).

[0115] The gate electrode (G6) of the sixth transistor (T6) is connected to the light emission control line (155), the first electrode (Ea6) of the sixth transistor (T6) is connected to the second electrode (Eb1) of the first transistor (T1) and the first electrode (Ea3) of the third transistor (T3), and the second electrode (Eb6) of the sixth transistor (T6) is electrically connected to the anode of the light-emitting diode (LED). The fifth transistor (T5) and the sixth transistor (T6) are turned on simultaneously according to the light emission control signal (EM) received through the light emission control line (155), and thereby the driving voltage (ELVDD) can be compensated through the diode-connected first transistor (T1) and transmitted to the light-emitting diode (LED).

[0116] The gate electrode (G7) of the seventh transistor (T7) is connected to the third scan line (154), the first electrode (Ea7) of the seventh transistor (T7) is connected to the second electrode (Eb6) of the sixth transistor (T6) and the anode of the light-emitting diode (LED), and the second electrode (Eb7) of the seventh transistor (T7) is connected to the initialization voltage (Vint) terminal and the first electrode (Ea4) of the fourth transistor (T4).

[0117] The transistors (T1, T2, T3, T4, T5, T6, T7) may be P-type channel transistors such as PMOS, but are not limited thereto, and at least one of the transistors (T1, T2, T3, T4, T5, T6, T7) may be an N-type channel transistor.

[0118] One end of the capacitor (Cst) is connected to the gate electrode (G1) of the first transistor (T1) as described above, and the other end is connected to the driving voltage line (172). The cathode of the light-emitting diode (LED) is connected to a common voltage (ELVSS) terminal that transmits the common voltage (ELVSS) so that the common voltage (ELVSS) can be applied.

[0119] Although it has been described above that one pixel (PX) includes seven transistors (T1 to T7), one holding capacitor (Cst), and one light-emitting diode (LED), this is merely an example, and the number of transistors, the number of capacitors, the number of light-emitting diodes, and their connection relationships can be varied.

[0120] 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

[0121] 110: Substrate 191: First electrode 195: Opening pattern of the first electrode 171: Data line 172: Driving voltage line 180: First Shield 182: Second Shield 510: Connecting electrode 600: Opening pattern of the driving voltage line

Claims

Claim 1 A display device comprising a substrate, a transistor located on the substrate, a first electrode connected to the transistor, a first protective film located between the transistor and the first electrode and comprising an organic insulating material, wiring located on the first protective film and overlapping with the first electrode, and a second protective film located between the wiring and the first electrode, wherein the wiring includes an opening pattern, and in a planar manner the wiring includes a first portion and a second portion having a width greater than the first portion, and the opening pattern is defined in the second portion. Claim 2 delete Claim 3 In claim 1, the second protective film is a display device comprising an organic insulating material. Claim 4 In claim 1, the opening pattern of the wiring is a display device that overlaps with the first electrode. Claim 5 In claim 1, the opening pattern of the wiring is formed in at least one of a circular, polygonal, or bar shape. Claim 6 A display device according to claim 1, wherein the wiring extends in a first direction and the opening pattern of the wiring is formed in a rod shape extending in the first direction. Claim 7 A display device according to claim 1, wherein the wiring extends in a first direction and the opening pattern of the wiring is formed in a rod shape extending in a direction oblique to the first direction. Claim 8 In claim 1, the wiring is a display device that overlaps with the area between the center and one edge of the first electrode. Claim 9 In claim 1, the wiring is a display device adjacent to one edge of the first electrode. Claim 10 In claim 1, the wiring is a display device that overlaps with one edge of the first electrode. Claim 11 In paragraph 10, a display device in which one side of the wiring coincides with one edge of the first electrode. Claim 12 In claim 1, the first electrode is a display device including an opening pattern. Claim 13 A display device comprising a substrate, a transistor located on the substrate, a first electrode connected to the transistor, a first protective film located between the transistor and the first electrode, wiring located on the first protective film and overlapping with the first electrode, and a second protective film located between the wiring and the first electrode, wherein the wiring includes an opening pattern, the first electrode includes an opening pattern, the first electrode is formed as a rectangle including two long sides extending in a first direction and two short sides extending in a second direction perpendicular to the first direction, the opening pattern of the first electrode is formed as a rectangle including two short sides extending in the first direction and two long sides extending in the second direction, and the wiring extending in the first direction. Claim 14 In paragraph 13, the opening pattern of the first electrode is a display device located at the center and one edge of the first electrode. Claim 15 In paragraph 14, the wiring is a display device that overlaps with the opening pattern of the first electrode. Claim 16 A display device comprising a substrate, a transistor located on the substrate, a first electrode connected to the transistor, a first protective film located between the transistor and the first electrode, wiring located on the first protective film and overlapping with the first electrode, and a second protective film located between the wiring and the first electrode, wherein the wiring includes an opening pattern, the first electrode includes an opening pattern, and the opening pattern of the wiring overlaps with the first electrode and does not overlap with the opening pattern of the first electrode. Claim 17 A display device according to claim 1, further comprising a connecting electrode connecting the transistor and the first electrode, wherein the connecting electrode is located on the same layer as the wiring. Claim 18 A display device according to claim 1, wherein a constant voltage is applied to the wiring and the wiring is connected to the transistor. Claim 19 In claim 18, the wiring comprises a driving voltage line to which a driving voltage is applied and a data line to which a data signal is applied, wherein the driving voltage line has a wider width than the data line and the opening pattern is formed on the driving voltage line. Claim 20 A display device comprising a substrate, a transistor located on the substrate, a first electrode connected to the transistor, a first protective film located between the transistor and the first electrode, a wiring located on the first protective film and overlapping with the first electrode, and a second protective film located between the wiring and the first electrode, wherein the wiring includes an opening pattern, a constant voltage is applied to the wiring, and the wiring is connected to the transistor, wherein the wiring includes a driving voltage line to which a driving voltage is applied and a data line to which a data signal is applied, wherein the driving voltage line has a wider width than the data line, and the opening pattern is formed on the driving voltage line, and the wiring further includes an initialization voltage line to which an initialization voltage is applied and a common voltage line to which a common voltage is applied, and wherein the opening pattern is formed on the initialization voltage line and the common voltage line.

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