Display device

Abstract

A display device includes a base substrate, a thin film transistor, an insulating layer, a connection electrode, a first via insulating layer, a first electrode, a light emitting layer, and a second electrode, wherein the thin film transistor is disposed on the base substrate and includes an active pattern, the insulating layer is disposed on the active pattern of the thin film transistor, the connection electrode is disposed on the insulating layer and electrically connected to the thin film transistor, wherein the connection electrode includes a bent wiring portion, the first via insulating layer covers the connection electrode, the first electrode is disposed on the first via insulating layer, the light emitting layer is disposed on the first electrode and at least partially overlaps the connection electrode, and the second electrode is disposed on the light emitting layer.

Description

Technical Field

[0001] Exemplary embodiments of the present invention generally relate to display devices. More specifically, exemplary embodiments of the present invention relate to display devices having connection electrodes. Background Technology

[0002] With technological advancements, display products with smaller size, lighter weight, and better performance are being produced. Conventional cathode ray tube (CRT) televisions have been widely used in display devices due to their performance and price. However, recently, display devices such as plasma displays, liquid crystal displays, and organic light-emitting diode displays have been increasingly used because, compared to CRTs, these devices offer increased miniaturization or portability, lighter weight, and relatively lower power consumption.

[0003] Organic light-emitting diode (OLED) display devices typically include a substrate, multiple wirings arranged on the substrate, and light-emitting structures arranged on the wirings. Summary of the Invention

[0004] According to an exemplary embodiment of the present invention, a display device includes a base substrate, a thin-film transistor, an insulating layer, a connection electrode, a first via insulating layer, a first electrode, a light-emitting layer, and a second electrode. The thin-film transistor is disposed on the base substrate and includes an active pattern. The insulating layer is disposed on the active pattern of the thin-film transistor. The connection electrode is disposed on the insulating layer and electrically connected to the thin-film transistor. The connection electrode includes a bent wiring portion. The first via insulating layer covers the connection electrode. The first electrode is disposed on the first via insulating layer. The light-emitting layer is disposed on the first electrode and at least partially overlaps with the connection electrode. The second electrode is disposed on the light-emitting layer.

[0005] In an exemplary embodiment of the present invention, the display device further includes a plurality of data lines, wherein the plurality of data lines are arranged along a first direction, wherein each of the plurality of data lines extends in a second direction intersecting the first direction, wherein the connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion in the second direction, and a bent wiring portion connecting the first contact portion to the second contact portion.

[0006] In an exemplary embodiment of the present invention, a data line adjacent to a connecting electrode among a plurality of data lines includes a straight portion and a bent portion connected to the straight portion, wherein the bent portion is adjacent to a bent wiring portion of the connecting electrode.

[0007] In an exemplary embodiment of the present invention concept, the light-emitting layer includes a blue light-emitting layer configured to emit blue light.

[0008] In an exemplary embodiment of the present invention, the display device further includes a red light-emitting layer and a green light-emitting layer, wherein the red light-emitting layer is spaced apart from the blue light-emitting layer and configured to emit red light, and the green light-emitting layer is spaced apart from the blue light-emitting layer and the red light-emitting layer and configured to emit green light, wherein the thickness of the blue light-emitting layer is less than the thickness of each of the red light-emitting layer and the green light-emitting layer.

[0009] In an exemplary embodiment of the present invention, the display device further includes a plurality of power lines arranged along a first direction, wherein each of the plurality of power lines extends in a second direction intersecting the first direction, wherein the connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion in the second direction, and a bent wiring portion connecting the first contact portion to the second contact portion, and wherein the power line adjacent to the connecting electrode among the plurality of power lines includes a straight portion and a bent wiring portion connected to the straight portion, wherein the bent wiring portion is adjacent to the bent wiring portion of the connecting electrode.

[0010] In an exemplary embodiment of the present invention, the connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first contact portion to the second contact portion, wherein the bent wiring portion has an annular shape.

[0011] In an exemplary embodiment of the concept of the present invention, the bent wiring portion overlaps with the light-emitting layer.

[0012] In an exemplary embodiment of the present invention, the connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first contact portion to the second contact portion, wherein the bent wiring portion has a bent shape.

[0013] In an exemplary embodiment of the present invention, the display device further includes a source electrode, a drain electrode, and a second via insulating layer, wherein the source electrode and the drain electrode are disposed between a base substrate and a connection electrode, and the second via insulating layer is disposed between the source electrode and the drain electrode and the connection electrode, wherein the connection electrode is electrically connected to the drain electrode through a contact hole formed through the second via insulating layer.

[0014] In an exemplary embodiment of the present invention, the connecting electrode includes a contact portion and a bent wiring portion connected to the contact portion, wherein the contact portion of the connecting electrode is electrically connected to the first electrode through a contact hole formed through a first through-hole insulating layer.

[0015] In an exemplary embodiment of the present invention, the bent wiring portion connecting the electrode has an annular shape, and wherein the bent wiring portion overlaps with the light-emitting layer.

[0016] In an exemplary embodiment of the present invention, the bent wiring portion connecting the electrode has a bent shape, and wherein the bent wiring portion overlaps with the light-emitting layer.

[0017] In an exemplary embodiment of the present invention, the connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first contact portion to the second contact portion, wherein each of the first contact portion and the second contact portion is electrically connected to a conductive pattern of another layer through a contact hole formed through a second through-hole insulating layer.

[0018] In an exemplary embodiment of the present invention, a protrusion or recess corresponding to the connecting electrode is formed on the top surface of the first through-hole insulating layer.

[0019] In an exemplary embodiment of the present invention, a protrusion is formed on the top surface of the first electrode that corresponds to the protrusion of the first through-hole insulating layer.

[0020] According to an exemplary embodiment of the present invention, a display device includes a base substrate, a thin-film transistor, an insulating layer, a connection electrode, a via insulating layer, a first electrode, a light-emitting layer, and a second electrode. The thin-film transistor is disposed on the base substrate and includes an active pattern. The insulating layer is disposed on the active pattern of the thin-film transistor. The connection electrode is disposed on the insulating layer and electrically connected to the thin-film transistor. The connection electrode includes a dummy portion containing a lateral portion extending in a first direction. The via insulating layer covers the connection electrode. The first electrode is disposed on the via insulating layer. The light-emitting layer is disposed on the first electrode and overlaps with the dummy portion of the connection electrode. The second electrode is disposed on the light-emitting layer.

[0021] In an exemplary embodiment of the concept of the present invention, the dummy portion further includes a longitudinal portion extending in a second direction substantially perpendicular to the first direction.

[0022] In an exemplary embodiment of the present invention, the connecting electrode further includes a first contact portion, a second contact portion spaced apart from the first contact portion in a second direction, and a connecting wiring portion connecting the first contact portion to the second contact portion, wherein a dummy portion extends from the first contact portion, the second contact portion, or the connecting wiring portion, and wherein the dummy portion overlaps with the light-emitting layer.

[0023] In an exemplary embodiment of the present invention, the light-emitting layer is a blue light-emitting layer configured to emit blue light. The display device further includes a red light-emitting layer spaced apart from the blue light-emitting layer and configured to emit red light, and a green light-emitting layer spaced apart from the blue and red light-emitting layers and configured to emit green light. The thickness of the blue light-emitting layer is less than the thickness of each of the red and green light-emitting layers. Attached Figure Description

[0024] The above and other features of the present invention will become more apparent from the detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a block diagram illustrating an exemplary embodiment of a display device according to a concept of the present invention;

[0026] Figure 2 It is shown that it includes Figure 1 A circuit diagram of an instance of a pixel in a display device;

[0027] Figure 3 This is a cross-sectional view illustrating an exemplary embodiment of a display device according to a concept of the present invention;

[0028] Figure 4 It is shown Figure 3 A plan view of the source-drain conductive layer, pixel electrode, and light-emitting layer of a display device;

[0029] Figure 5A , Figure 5B , Figure 5C and Figure 5D This is a plan view illustrating various examples of connection electrodes of a display device according to an exemplary embodiment of the concept of the present invention;

[0030] Figure 6 This is a cross-sectional view of a display device according to an exemplary embodiment of the concept of the present invention;

[0031] Figure 7 It is shown Figure 6 A plan view of the electrodes, pixel electrodes, and light-emitting layer of a display device;

[0032] Figure 8 This is a block diagram illustrating an electronic device according to an exemplary embodiment of the concept of the present invention;

[0033] Figure 9A It is shown Figure 8 A diagram illustrating an example of an electronic device implemented as a television; and

[0034] Figure 9B It is shown Figure 8 The diagram shows an example of an electronic device implemented as a smartphone. Detailed Implementation

[0035] In the following sections, exemplary embodiments of the concepts of the present invention will be explained in detail with reference to the accompanying drawings.

[0036] Figure 1 This is a block diagram illustrating an exemplary embodiment of a display device according to a concept of the present invention.

[0037] Reference Figure 1The display device may include a display panel 10, a scan driver 20, a data driver 30, a transmission control driver 40, and a controller 50.

[0038] Display panel 10 may include a plurality of pixels PX for displaying images. For example, display panel 10 may include n×m pixels PX located at the intersection of scan lines SL1 to SLn and data lines DL1 to DLm (e.g., where n and m are integers greater than 1). (Refer to...) Figure 2 The structure of pixel PX is described in detail.

[0039] The scan driver 20 can sequentially provide a first scan signal to the pixel PX via scan lines SL1 to SLn based on the first control signal CTL1, and sequentially provide a second scan signal to the pixel PX via inverted scan lines / SL1 to / SLn. For example, the second scan signal can be the inverted signal of the first scan signal.

[0040] The data driver 30 can provide data signals to the pixel PX via data lines DL1 to DLm based on the second control signal CTL2.

[0041] The transmit control driver 40 can sequentially provide transmit control signals to the pixel PX via transmit control lines EM1 to EMn based on the third control signal CTL3.

[0042] The controller 50 can control the scan driver 20, the data driver 30, and the transmit control driver 40. The controller 50 can generate first control signals CTL1 to third control signals CTL3 to control the scan driver 20, the data driver 30, and the transmit control driver 40, respectively. For example, the first control signal CTL1 for controlling the scan driver 20 may include a scan start signal, a scan clock signal, and the like. For example, the second control signal CTL2 for controlling the data driver 30 may include image data, a horizontal start signal, and the like. For example, the third control signal CTL3 for controlling the transmit control driver 40 may include a transmit control start signal, a transmit control clock signal, and the like.

[0043] Additionally, the display device may include a power supply unit configured to supply a first power supply voltage ELVDD, a second power supply voltage ELVSS, and an initialization voltage VINT to the display panel 10.

[0044] Figure 2 It is shown that it includes Figure 1 A circuit diagram of an example of a pixel in a display device.

[0045] Reference Figure 2Pixel PX may include first transistors T1 to seventh transistors T7, storage capacitor CST, and organic light-emitting diode (OLED). Pixel PX may be located in the i-th pixel row (e.g., where i is an integer between 1 and n) and the j-th pixel column (e.g., where j is an integer between 1 and m).

[0046] The first transistor T1 may be a driving transistor configured to provide a driving current corresponding to the received data signal to an organic light-emitting diode (OLED). The first transistor T1 may include a gate electrode connected to a first node N1, a first electrode connected to a second node N2, and a second electrode connected to a third node N3.

[0047] The second transistor T2 can provide a data signal to the first transistor T1 in response to the first scan signal GS1. In an exemplary embodiment of the present invention, the second transistor T2 may include a gate electrode configured to receive the first scan signal GS1 from the i-th scan line SL1, a first electrode configured to receive a data signal from the j-th data line DLj, and a second electrode connected to the first electrode of the first transistor T1. For example, the second electrode of the second transistor T2 may be connected to the second node N2.

[0048] The third transistor T3 may connect the second electrode of the first transistor T1 to the gate electrode of the first transistor T1 in response to the second scan signal GS2. In an exemplary embodiment of the present invention, the third transistor T3 may include a gate electrode configured to receive the second scan signal GS2 from the i-th reverse scan line / SLi, a first electrode connected to the second electrode of the first transistor T1, and a second electrode connected to the gate electrode of the first transistor T1. For example, the first electrode of the third transistor T3 may be connected to a third node N3. For example, the second electrode of the third transistor T3 may be connected to a first node N1.

[0049] The fourth transistor T4 may apply an initialization voltage VINT to the gate electrode of the first transistor T1 in response to a third scan signal GS3. In an exemplary embodiment of the present invention, the fourth transistor T4 may include a gate electrode, a first electrode connected to the initialization voltage VINT, and a second electrode connected to the gate electrode of the first transistor T1 at a first node N1. The gate electrode of the fourth transistor T4 is configured to receive the third scan signal GS3 from the (i-1)th reverse scan line / SL(i-1).

[0050] A fifth transistor T5 may apply a first power supply voltage ELVDD to a first electrode of a first transistor T1 in response to a transmit control signal. In an exemplary embodiment of the present invention, the fifth transistor T5 may include a gate electrode, a first electrode connected to the first power supply voltage ELVDD, and a second electrode connected to the first electrode of the first transistor T1 at a second node N2. The gate electrode of the fifth transistor T5 is configured to receive a transmit control signal from the i-th transmit control line EMi.

[0051] A sixth transistor T6 can connect the second electrode of the first transistor T1 to the first electrode of the organic light-emitting diode (OLED) in response to an emission control signal. In an exemplary embodiment of the present invention, the sixth transistor T6 may include a gate electrode, a first electrode connected to the second electrode of the first transistor T1 at a third node N3, and a second electrode connected to the first electrode of the OLED at a fourth node N4. The gate electrode of the sixth transistor T6 is configured to receive an emission control signal from the i-th emission control line EMi.

[0052] The seventh transistor T7 can apply an initialization voltage VINT to the first electrode of the organic light-emitting diode (OLED) in response to a fourth scan signal GS4. In an exemplary embodiment of the present invention, the seventh transistor T7 may include a gate electrode, a first electrode connected to the initialization voltage VINT, and a second electrode connected to the first electrode (i.e., the fourth node N4) of the OLED. The gate electrode of the seventh transistor T7 is configured to receive the fourth scan signal GS4 from the (i-1)th inverted scan line / SL(i-1).

[0053] The storage capacitor CST may include a first electrode connected to a first power supply voltage ELVDD and a second electrode connected to the gate electrode of a first transistor T1 at a first node N1.

[0054] Figure 3 This is a cross-sectional view illustrating an exemplary embodiment of a display device according to a concept of the present invention.

[0055] Reference Figure 3 The display device may include a base substrate 100, a buffer layer 110, an active pattern ACT, a first insulating layer 120, a gate conductive layer, a second insulating layer 130, a source-drain conductive layer, a through-hole insulating layer VIA, a pixel defining layer PDL, a light-emitting structure 180, and a thin-film encapsulation layer TFE.

[0056] The base substrate 100 may be formed of a transparent or opaque material. For example, the base substrate 100 may include a quartz substrate, a synthetic quartz substrate, a calcium fluoride substrate, a fluorine-doped quartz substrate (e.g., an F-doped quartz substrate), a soda-lime glass substrate, a non-alkaline glass substrate, and the like. In an exemplary embodiment of the present invention, the base substrate 100 may be a flexible, transparent resin substrate. Examples of transparent resin substrates that may be used as the base substrate 100 include polyimide substrates.

[0057] A buffer layer 110 may be disposed on the base substrate 100. The buffer layer 110 prevents metal atoms or impurities from diffusing from the base substrate 100 into the active pattern ACT, and can control the heat transfer rate during the crystallization process used to form the active pattern ACT to obtain a substantially uniform active pattern ACT. Additionally, when the surface of the base substrate 100 is non-uniform, the buffer layer 110 can be used to increase the flatness of the surface of the base substrate 100. For example, the buffer layer 110 can planarize the upper surface of the base substrate 100.

[0058] The active pattern ACT of a thin-film transistor (TFT) can be disposed on a buffer layer 110. For example, the active pattern ACT may include polycrystalline silicon. The active pattern ACT may include a drain region D and a source region S doped with impurities, and a channel region C disposed between the drain region D and the source region S. For example, polycrystalline silicon can be formed by depositing amorphous silicon and crystallizing the amorphous silicon. In an exemplary embodiment of the present invention concept, the active pattern ACT may include an oxide semiconductor. For example, the oxide semiconductor may be a binary compound (AB) comprising tin (Sn), indium (In), zinc (Zn), gallium (Ga), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium (Zr), magnesium (Mg) and the like. x ), ternary compounds (AB) x C y ), quaternary compounds (AB) x C y D z Semiconductor oxide layers of ) and similar materials.

[0059] A first insulating layer 120 may be disposed on the active pattern ACT. For example, the first insulating layer 120 may be disposed with a substantially uniform thickness along the contour of the active pattern ACT to cover the active pattern ACT on the buffer layer 110. Additionally, the first insulating layer 120 may cover the active pattern ACT on the buffer layer 110 and may have a substantially flat top surface without creating steps around the active pattern ACT. The first insulating layer 120 may comprise an inorganic insulating material such as a silicon compound or a metal oxide.

[0060] A gate conductive layer may be disposed on the first insulating layer 120. The gate conductive layer may include the gate electrode GE of a thin-film transistor (TFT). The gate conductive layer may be formed using metals, alloys, metal nitrides, conductive metal oxides, transparent conductive materials, and the like.

[0061] The second insulating layer 130 may cover the gate conductive layer on the first insulating layer 120 and may have a substantially flat top surface without creating steps around the gate conductive layer. Additionally, the second insulating layer 130 may be arranged with a substantially uniform thickness along the contour of the gate conductive layer to cover the gate conductive layer on the first insulating layer 120. The second insulating layer 130 may comprise an inorganic insulating material such as a silicon compound or a metal oxide.

[0062] A source-drain conductive layer may be disposed on the second insulating layer 130. The source-drain conductive layer may include a connection electrode CE and a contact pad CP. The source-drain conductive layer may also include signal lines and voltage lines, such as data lines (e.g., see...). Figure 4 (DL) and power cord (e.g., see DL) Figure 4 The source-drain conductive layer can be formed using metals, alloys, metal nitrides, conductive metal oxides, transparent conductive materials, and the like. The connection electrode CE and the contact pad CP can each contact the source region S and the drain region D through corresponding contact holes formed in the first insulating layer 120 and the second insulating layer 130, respectively.

[0063] The via insulating layer (VIA) can be disposed on the source-drain conductive layer. The via insulating layer (VIA) can have a single-layer structure or a multilayer structure including at least two insulating films. The via insulating layer (VIA) can be formed using organic materials such as photoresists, acrylic resins, polyimide resins, polyamide resins, and siloxane resins.

[0064] The light-emitting structure 180 may include a first electrode 181, a light-emitting layer 182, and a second electrode 183.

[0065] The first electrode 181 may be disposed on the through-hole insulating layer VIA. Alternatively, the first electrode 181 may be connected to the contact pad CP through a contact hole formed in the through-hole insulating layer VIA. Depending on the light emission scheme of the display device, the first electrode 181 may be formed using, for example, a reflective or transmissive material. In an exemplary embodiment of the present invention, the first electrode 181 may have a single-layer or multi-layer structure including, for example, a metal film, an alloy film, a metal nitride film, a conductive metal oxide film, and / or a transparent conductive material film.

[0066] A pixel defining layer (PDL) may be disposed on a via insulating layer (VIA) on which the first electrode 181 is disposed. The PDL may be formed using organic, inorganic, and similar materials. For example, the PDL may be formed using photoresist, polyacrylate resin, polyimide resin, acrylic resin, silicon compound, and the like. In an exemplary embodiment of the present invention, the PDL may be etched to form an opening that partially exposes the first electrode 181. The emitting and non-emitting regions of the display device may be formed through the openings in the PDL. For example, the openings in the PDL may correspond to the emitting regions, and the non-emitting regions may correspond to the portions of the PDL adjacent to the openings.

[0067] The light-emitting layer 182 may be disposed on the first electrode 181 exposed through an opening in the pixel-defining layer PDL. For example, the light-emitting layer 182 may be disposed within the opening in the pixel-defining layer PDL. Additionally, the light-emitting layer 182 may extend to the sidewall of the opening in the pixel-defining layer PDL. In an exemplary embodiment of the present invention, the light-emitting layer 182 may have a multilayer structure including an organic light-emitting layer, a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, and the like. In an exemplary embodiment of the present invention, in addition to the organic light-emitting layer, the hole injection layer, the hole transport layer, the electron transport layer, the electron injection layer, and the like may be collectively formed to correspond to a plurality of pixels. The organic light-emitting layer of the light-emitting layer 182 may be formed using a light-emitting material that generates different colors of light (e.g., red, green, and blue light) according to each pixel of the display device (e.g., see...). Figure 4 (182a, 182b and 182c).

[0068] The second electrode 183 may be disposed on the pixel defining layer (PDL) and the light-emitting layer 182. Depending on the light-emitting scheme of the display device, the second electrode 183 may include a transmissive material or a reflective material. In an exemplary embodiment of the present invention, the second electrode 183 may have a single-layer structure or a multi-layer structure including, for example, a metal film, an alloy film, a metal nitride film, a conductive metal oxide film, and / or a transparent conductive material film.

[0069] A thin-film encapsulation layer (TFE) may be disposed on the second electrode 183. The TFE prevents moisture and oxygen from penetrating the display device from the outside. The TFE may include at least one organic layer and at least one inorganic layer. The at least one organic layer and at least one inorganic layer may be stacked alternately on top of each other. For example, the TFE may include two inorganic layers and an organic layer disposed between them, but the inventive concept is not limited thereto. In an exemplary embodiment of the inventive concept, a sealing substrate may be provided instead of the thin-film encapsulation layer to prevent external gases and moisture from penetrating into the display device.

[0070] Figure 4 It is shown Figure 3 A plan view of the source-drain conductive layer, pixel electrodes, and light-emitting layer of a display device. Figure 4 In the diagram, the planar view shows the regions corresponding to one red sub-pixel (see 182a), one blue sub-pixel (see 182c), and four green sub-pixels (see 182b).

[0071] Reference Figure 3 and Figure 4 The source-drain conductive layer may include data lines (DL), power lines (PL), contact pads (CP), and connection electrodes (CE).

[0072] The data line DL can extend in the second direction D2. The data line DL can have a substantially straight shape. In addition, the data line DL can include a bent line portion DLb and a straight line portion DLa connected to the bent line portion DLb. Furthermore, the data line DL is adjacent to the light-emitting layer 182c, which is the emitting region. For example, the connection between the straight line portion DLa and the bent line portion DLb is adjacent to the light-emitting layer 182c.

[0073] The power line PL may be spaced apart from the first data line DL in a first direction D1 and extend in a second direction D2. Furthermore, the power line PL may include a bent portion PLb and a straight portion PLA connected to the bent portion PLb. Additionally, the power line PL is adjacent to the light-emitting layer 182c, which serves as the emitting region. For example, the connection between the straight portion PLA and the bent portion PLb is adjacent to the light-emitting layer 182c.

[0074] The above configuration is to prevent the connection electrode CE from being adjacent to the data line DL or the power line PL without design margin when the connection electrode CE has an annular shape or similar shape that increases in size in the first direction D1 which is substantially perpendicular to the second direction D2.

[0075] A red sub-pixel may include a first electrode 181a, a red light-emitting layer 182a, and a second electrode. A green sub-pixel may include a first electrode 181b, a green light-emitting layer 182b, and a second electrode. A blue sub-pixel may include a first electrode 181c, a blue light-emitting layer 182c, and a second electrode.

[0076] In the blue subpixel, the contact pad CP can be accessed through the via insulating layer VIA (see, for example, see...). Figure 3 The formed contact hole is electrically connected to the first electrode 181c. The contact pad CP may not overlap with the blue light-emitting layer 182c arranged in the opening of the pixel-defining layer PDL.

[0077] Additionally, in the red or green sub-pixel, the contact pad CP corresponding to the corresponding pixel can be electrically connected to the first electrode 181a and 181b respectively through contact holes formed through the via insulating layer VIA. The contact pad CP may not overlap with the red light-emitting layer 182a and the green light-emitting layer 182b.

[0078] The connecting electrode CE may overlap with the blue light-emitting layer 182c. The connecting electrode CE may include a first contact portion, a second contact portion spaced apart from the first contact portion in the second direction D2, and a bent wiring portion connecting the first contact portion to the second contact portion. (Refer to below...) Figure 5C and Figure 5D This configuration is described in detail.

[0079] The connecting electrode CE can be formed corresponding to each of the sub-pixels, and the connecting electrode CE overlapping the blue emitting layer 182c may include a bent wiring portion. Accordingly, the protrusions and recesses corresponding to the connecting electrode CE may be formed on the top surface of the through-hole insulating layer VIA (see, for example, see...). Figure 3 The via insulating layer VIA is located on its top surface. For example, the top surface of the via insulating layer VIA may be uneven and include protrusions and depressions. Since the via insulating layer VIA is not completely planarized, the via insulating layer VIA may have an inclined portion (e.g., a protrusion or depression) along the connection electrode CE, which is a wiring disposed below the via insulating layer VIA, and a protrusion or depression corresponding to the protrusion or depression of the via insulating layer VIA may be formed on the top surface of the first electrode 181c (e.g., see [reference]). Figure 3 On the top surface of 181.

[0080] For example, the connecting electrode CE is part of the source-drain conductive layer, and the source-drain conductive layer typically extends in the second direction D2, where the white angular difference (WAD) can vary depending on the azimuth angle. For example, WAD deviations may occur when the display device is viewed at an angle from the left or right side, or from the top or bottom side.

[0081] According to this embodiment, the connecting electrode CE includes a bent wiring portion, such that the uneven portion can be formed as a bent line. Accordingly, the WAD distribution can be improved, and the variation in luminance and color coordinates according to the azimuth angle can be reduced.

[0082] Here, WAD is a factor used to evaluate the change in white light emission characteristics of an organic light-emitting diode display device with respect to the viewing angle, and is an indicator used to check the degree of improvement in wide viewing angle. For example, referring to WAD, compared with the case where the shape structure of the connection electrodes in the exemplary embodiment of the present invention is not applied, the changes in brightness and color coordinates based on the front side perpendicular to the screen of the display device with respect to the viewing angle can be reduced, thereby improving display quality.

[0083] Here, as the WAD improvement rate increases, there is no significant difference in brightness and color coordinate changes when the display device is viewed from the side at an angle compared to when the display device is viewed from the front.

[0084] Furthermore, the unevenness formed on the top surface of the first electrode by the bent wiring portion connecting the electrode CE reduces the variation in brightness and color coordinates depending on the azimuth angle. In other words, when the display device is viewed at an angle in various directions such as up, down, left, and right, the variation in brightness and color coordinates depending on the viewing azimuth angle is reduced, thereby improving display quality.

[0085] Furthermore, the thickness of the blue light-emitting layer 182c can be less than the thickness of each of the red light-emitting layer 182a and the green light-emitting layer 182b. For example, the thickness of the green light-emitting layer 182b can be greater than the thickness of the blue light-emitting layer 182c, and the thickness of the red light-emitting layer 182a can be greater than the thickness of the green light-emitting layer 182b. Therefore, the blue light-emitting layer 182c, which has the smallest thickness, can have a large WAD or large deviation according to the azimuth angle due to the unevenness formed on the top surface of the first electrode, and the WAD or deviation according to the azimuth angle is increased by the bent wiring portion connecting the electrode CE.

[0086] Figure 5A , Figure 5B , Figure 5C and Figure 5D This is a plan view illustrating various examples of connection electrodes of a display device according to an exemplary embodiment of the concept of the present invention.

[0087] Reference Figure 5A The connecting electrode CE may include a first contact portion CT1, a second contact portion CT2 spaced apart from the first contact portion CT1 in a second direction D2, a connecting wiring portion CL connecting the first contact portion CT1 to the second contact portion CT2, and a dummy portion DM including a lateral portion DMa and a longitudinal portion DMb, wherein the lateral portion DMa extends in the first direction D1 and connects to the second contact portion CT2, and the longitudinal portion DMb extends in the second direction D2 and connects to the lateral portion DMa. The dummy portion DM may overlap with the light-emitting layer 182c. For example, the light-emitting layer 182c may completely overlap with the dummy portion DM.

[0088] and Figure 4 Similar to the bent wiring section described herein, the dummy section DM can be formed with an inclined portion (concave-convex portion) on the top surface of the first electrode. Accordingly, deviations in WAD and luminance and color coordinates based on azimuth angle can be improved.

[0089] Reference Figure 5B The connecting electrode CE may include a first contact portion CT1, a second contact portion CT2 spaced apart from the first contact portion CT1 in a second direction D2, a connecting wiring portion CL connecting the first contact portion CT1 to the second contact portion CT2, and a dummy portion including a first transverse portion DMa1 and a second transverse portion DMa2 extending to the left and right respectively from the connecting wiring portion CL in the first direction D1. The dummy portion may be electrically connected to the first contact portion CT1, the second contact portion CT2, and the connecting wiring portion CL of the connecting electrode CE, and may have, except for Figure 5A and Figure 5B Various shapes other than those shown. For example, a dummy part can have a bent line shape and a straight line shape.

[0090] Reference Figure 5C The connecting electrode CE may include a first contact portion CT1, a second contact portion CT2 spaced apart from the first contact portion CT1 in a second direction D2, and a first bent wiring portion CL1 and a second bent wiring portion CL2 connecting the first contact portion CT1 to the second contact portion CT2. The first bent wiring portion CL1 and the second bent wiring portion CL2 may have annular shapes. The first bent wiring portion CL1 and the second bent wiring portion CL2 with annular shapes may overlap with the light-emitting layer 182c. For example, the first bent wiring portion CL1 and the second bent wiring portion CL2 may completely overlap with the light-emitting layer 182c.

[0091] Reference Figure 5D The connecting electrode CE may include a first contact portion CT1, a second contact portion CT2 spaced apart from the first contact portion CT1 in a second direction D2, and a bent wiring portion CCL connecting the first contact portion CT1 to the second contact portion CT2. The bent wiring portion CCL may have an arc shape or a bent shape. The bent wiring portion CCL may overlap with the light-emitting layer 182c. For example, the light-emitting layer 182c may completely overlap with the bent wiring portion CCL.

[0092] Figure 6 This is a cross-sectional view of a display device according to an exemplary embodiment of the concept of the present invention, and Figure 7 It is shown Figure 6 A plan view of the electrodes, pixel electrodes, and light-emitting layer of the display device.

[0093] Reference Figure 6 and Figure 7The display device may include a base substrate 100, a buffer layer 110, an active pattern ACT of a thin-film transistor (TFT), a first insulating layer 120, a first gate conductive layer, a second insulating layer 130, a second gate conductive layer, a third insulating layer 140, a first source-drain conductive layer, a first via insulating layer VIA1, a second source-drain conductive layer, a second via insulating layer VIA2, a pixel defining layer PDL, a light-emitting structure 180, and a thin-film encapsulation layer TFE. In addition to Figure 6 In addition to the second source-drain conductive layer, the display device also includes the second source-drain conductive layer. Figure 6 The components of the display device can be respectively connected with Figure 3 and Figure 4 The components of the display device are essentially the same. Therefore, any redundant descriptions can be omitted.

[0094] The first gate conductive layer may include the gate electrode GE of a thin-film transistor (TFT). The second gate conductive layer may include a storage electrode STE that overlaps with the gate electrode GE to form a storage capacitor.

[0095] The first source-drain conductive layer may include the source electrode SE and drain electrode DE of the thin-film transistor TFT. The second source-drain conductive layer may include an electrode EL. The electrode EL may include a contact portion CP, a dummy bent wiring portion DM spaced apart from the contact portion CP in a second direction D2, and a connection wiring portion CL connecting the dummy bent wiring portion DM to the contact portion CP. The dummy bent wiring portion DM may have a bent line shape and may have, for example, an annular shape. The dummy bent wiring portion DM may overlap with the light-emitting layer 182 of the light-emitting structure 180. For example, the dummy bent wiring portion DM may completely overlap with the light-emitting layer 182.

[0096] The contact portion CP of electrode EL can be electrically connected to the first electrode 181 of light-emitting structure 180 through a contact hole formed through the second through-hole insulating layer VIA2. The contact portion CP of electrode EL can be electrically connected to the thin-film transistor TFT through a contact hole formed through the first through-hole insulating layer VIA1.

[0097] In an exemplary embodiment of the concept of the present invention, the electrode EL can be... Figures 5A to 5D The connection electrodes are similar. For example, electrode EL may include a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first and second contact portions to each other. For example, the first or second contact portion may be connected to a thin-film transistor (TFT). However, the concept of the invention is not limited thereto. For example, each of the first and second contact portions may be electrically connected to a conductive pattern (e.g., a thin-film transistor TFT) through a contact hole formed through the first through-hole insulating layer VIA1.

[0098] Figure 8 This is a block diagram illustrating an electronic device according to an exemplary embodiment of the concept of the present invention. Figure 9A It is shown Figure 8 The diagram illustrates an example of an electronic device implemented as a television, and Figure 9B It is shown Figure 8 The diagram shows an example of an electronic device implemented as a smartphone.

[0099] Reference Figure 8 As shown in Figure 9, electronic device 500 may include processor 510, memory device 520, storage device 530, input / output (I / O) device 540, power supply 550, and display device 560. Here, display device 560 may be... Figure 1 The display device. Additionally, the electronic device 500 may also include multiple ports for communicating with, for example, video cards, sound cards, memory cards, universal serial bus (“USB”) devices, other electronic devices, etc. In exemplary embodiments of the present invention, such as... Figure 9A As shown, the electronic device 500 can be implemented as a television. In an exemplary embodiment of the concept of the present invention, as... Figure 9B As shown, the electronic device 500 can be implemented as a smartphone. However, the electronic device 500 is not limited to this. For example, the electronic device 500 can be implemented as a cellular phone, video phone, smart tablet, smart watch, tablet PC, car navigation system, computer display, laptop, head-mounted display (HMD) device, etc.

[0100] Processor 510 can perform various computing functions. Processor 510 can be a microprocessor, central processing unit (CPU), application processor (AP), etc. Processor 510 can be connected to other components via address bus, control bus, data bus, etc. In addition, processor 510 can be connected to an expansion bus such as a Peripheral Component Interconnect (PCI) bus. Memory device 520 can store data used for the operation of electronic device 500. For example, memory device 520 may include at least one non-volatile memory device and / or at least one volatile memory device, wherein the at least one non-volatile memory device is such as an erasable programmable read-only memory (EPROM) device, an electrically erasable programmable read-only memory (EEPROM) device, a flash memory device, a phase-change random access memory (PRAM) device, a resistive random access memory (RRAM) device, a nano-floating gate memory (NFGM) device, a polymer random access memory (PoRAM) device, a magnetic random access memory (MRAM) device, a ferroelectric random access memory (FRAM) device, etc., and at least one volatile memory device is such as a dynamic random access memory (DRAM) device, a static random access memory (SRAM) device, a mobile DRAM device, etc. For example, storage device 530 may include a solid-state drive (SSD) device, a hard disk drive (HDD) device, a CD-ROM device, etc. I / O device 540 may include input devices and output devices, wherein input devices are such as a keyboard, keypad, mouse device, touchpad, touch screen, etc., and output devices are such as a printer, speaker, etc. Power supply 550 provides power for the operation of electronic device 500.

[0101] The display device 560 can be connected to other components via a bus or other communication link. In an exemplary embodiment of the present invention, the I / O device 540 may include the display device 560. As described above, in the display device 560, the connection electrode of the source-drain conductive layer disposed below the light-emitting layer of the light-emitting structure includes bent wiring portions or dummy portions, such that uneven portions can be formed on the top surface of the first electrode of the light-emitting structure. Accordingly, the WAD distribution can be improved, and the variation of brightness and color coordinates according to the azimuth angle can be reduced. Since these have been described above, the related repeated descriptions will not be repeated.

[0102] Embodiments of the present invention can be applied to display devices and electronic devices including display devices. For example, the present invention can be applied to smartphones, cellular phones, video phones, smart tablets, smartwatches, tablet computers, car navigation systems, televisions, computer displays, laptops, head-mounted display devices, etc.

[0103] Although the inventive concept has been described with reference to exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope and spirit of the inventive concept.

Claims

1. A display device, comprising: Basic substrate; A thin-film transistor disposed on the base substrate and comprising an active pattern; An insulating layer disposed on the active pattern of the thin-film transistor; A connecting electrode is disposed on the insulating layer and electrically connected to the thin-film transistor, wherein the connecting electrode includes a bent wiring portion; A first through-hole insulating layer covers the connecting electrode; A first electrode is disposed on the top surface of the first through-hole insulating layer and overlaps with the bent wiring portion of the connecting electrode in a plan view; A light-emitting layer, the light-emitting layer being disposed on the first electrode and at least partially overlapping the connecting electrode in a plan view; and The second electrode is disposed on the light-emitting layer.

2. The display device as claimed in claim 1, further comprising: A plurality of data lines are arranged along a first direction, wherein each of the plurality of data lines extends in a second direction intersecting the first direction. The connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion in the second direction, and a bent wiring portion that connects the first contact portion to the second contact portion.

3. The display device as claimed in claim 2, wherein, The data lines adjacent to the connecting electrode include a straight portion and a bent portion connected to the straight portion, wherein the bent portion is adjacent to the bent wiring portion of the connecting electrode.

4. The display device as claimed in claim 1, wherein, The light-emitting layer includes a blue light-emitting layer configured to emit blue light.

5. The display device as claimed in claim 4, further comprising: A red light-emitting layer, which is spaced apart from the blue light-emitting layer and configured to emit red light; as well as A green emitting layer, spaced apart from the blue and red emitting layers and configured to emit green light. The thickness of the blue luminescent layer is less than the thickness of each of the red and green luminescent layers.

6. The display device as claimed in claim 1, further comprising: A plurality of power lines are arranged along a first direction, wherein each of the plurality of power lines extends in a second direction intersecting the first direction. The connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion in the second direction, and a bent wiring portion connecting the first contact portion to the second contact portion. Among the plurality of power lines, the power line adjacent to the connecting electrode includes a straight portion and a bent portion connected to the straight portion, wherein the bent portion is adjacent to the bent wiring portion of the connecting electrode.

7. The display device as claimed in claim 1, wherein, The connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first contact portion to the second contact portion. The bent wiring section has a ring shape.

8. The display device as claimed in claim 7, wherein, The bent wiring section overlaps with the light-emitting layer.

9. The display device as claimed in claim 1, wherein, The connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first contact portion to the second contact portion. The bent wiring section has a bent shape.

10. The display device of claim 1, further comprising: A source electrode and a drain electrode, wherein the source electrode and the drain electrode are disposed between the base substrate and the connection electrode; as well as A second via insulating layer is disposed between the source electrode, the drain electrode, and the connection electrode. The connecting electrode is electrically connected to the drain electrode through a contact hole formed through the second through-hole insulating layer.

11. The display device as claimed in claim 10, wherein, The connecting electrode includes a contact portion and a bent wiring portion connected to the contact portion, and The contact portion of the connecting electrode is electrically connected to the first electrode through a contact hole formed through the first through-hole insulating layer.

12. The display device as claimed in claim 11, wherein, The bent wiring portion of the connecting electrode has an annular shape, and The bent wiring portion overlaps with the light-emitting layer.

13. The display device as claimed in claim 11, wherein, The bent wiring portion of the connecting electrode has a bent shape, and The bent wiring portion overlaps with the light-emitting layer.

14. The display device as claimed in claim 10, wherein, The connecting electrode includes a first contact portion, a second contact portion spaced apart from the first contact portion, and a bent wiring portion connecting the first contact portion to the second contact portion. Each of the first contact portion and the second contact portion is electrically connected to the conductive pattern of another layer through a contact hole formed through the second through-hole insulating layer.

15. The display device as claimed in claim 1, wherein, The top surface of the first through-hole insulating layer has a concave-convex portion corresponding to the connecting electrode.

16. The display device as claimed in claim 15, wherein, The top surface of the first electrode has a protrusion corresponding to the protrusion of the first through-hole insulating layer.

17. A display device, comprising: Basic substrate; A thin-film transistor disposed on the base substrate and comprising an active pattern; An insulating layer disposed on the active pattern of the thin-film transistor; A connecting electrode is disposed on the insulating layer and electrically connected to the thin-film transistor, wherein the connecting electrode includes a dummy portion comprising a lateral portion extending in a first direction; A through-hole insulating layer, the through-hole insulating layer covering the connecting electrode; A first electrode is disposed on the top surface of the through-hole insulating layer and overlaps with the dummy portion of the connecting electrode in a plan view; A light-emitting layer, the light-emitting layer being disposed on the first electrode and overlapping the dummy portion of the connecting electrode in a plan view; and The second electrode is disposed on the light-emitting layer.

18. The display device as claimed in claim 17, wherein, The dummy portion also includes a longitudinal portion extending in a second direction perpendicular to the first direction.

19. The display device as claimed in claim 17, wherein, The connection electrode further includes a first contact portion, a second contact portion spaced apart from the first contact portion in a second direction, and a connection wiring portion connecting the first contact portion to the second contact portion, wherein the dummy portion extends from the first contact portion, the second contact portion, or the connection wiring portion, and The dummy part overlaps with the light-emitting layer.

20. The display device as claimed in claim 17, wherein, The light-emitting layer is a blue light-emitting layer configured to emit blue light. The display device further includes: A red emitting layer, spaced apart from the blue emitting layer and configured to emit red light; and A green emitting layer, spaced apart from the blue and red emitting layers and configured to emit green light, and The thickness of the blue luminescent layer is less than the thickness of each of the red and green luminescent layers.

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