Display panel and electroluminescent display device comprising the same

Abstract

Embodiments of the present disclosure relate to a display panel and an electroluminescent display apparatus including the same. More particularly, a display panel and an electroluminescent display apparatus can be provided, which can include a first insulating film including a first hole exposing a portion of an upper surface of an auxiliary electrode, a second insulating film including a second hole overlapping the first hole of the first insulating film, an electrode pattern disposed on a portion of an upper surface of the first insulating film and overlapping the second hole of the second insulating film, a first electrode of a light emitting device disposed on the second insulating film, a bank overlapping a portion of an upper surface of the first electrode and disposed on the second insulating film, a light emitting layer of the light emitting device disposed on a portion of an upper surface of the auxiliary electrode, and a second electrode of the light emitting device contacting a portion of the upper surface of the auxiliary electrode overlapping the first hole of the first insulating film, thereby causing the cathode and the auxiliary electrode to be electrically connected to each other.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2020-0179468, filed on December 21, 2020, which is incorporated herein by reference for all purposes, as if fully set forth herein. Technical Field

[0003] Embodiments of this disclosure relate to a display panel and an electroluminescent display device including the display panel. Background Technology

[0004] Typically, electronic devices such as monitors, televisions, laptops, and digital cameras include display devices for displaying images. For example, display devices may include liquid crystal displays and electroluminescent displays.

[0005] Large electroluminescent display devices are difficult to maintain uniform brightness, and brightness differences may exist between the edge and central regions. When current flows from the cathode of the light-emitting device between the edge and central regions, the current reaches a point far from where it entered. In this case, a voltage drop may occur due to the resistance of the cathode of the light-emitting device, resulting in a brightness difference between the edge and central regions.

[0006] In other words, in large electroluminescent display devices, the brightness uniformity may be significantly reduced due to the brightness difference between the edge and central regions caused by the resistance of the upper electrode of the light-emitting device. Therefore, a method to compensate for the brightness difference is needed. Summary of the Invention

[0007] Embodiments of this disclosure relate to a display panel and an electroluminescent display device including the display panel, the display panel having the following structure: the cathode of the light-emitting device can be electrically connected to an auxiliary electrode without the need for an inverted conical barrier wall structure.

[0008] Embodiments of this disclosure relate to a display panel and an electroluminescent display device including the display panel, the display panel having a structure that prevents the separation of a dam in a region corresponding to a region where an auxiliary electrode is provided from an insulating film.

[0009] Embodiments of this disclosure relate to a display panel and an electroluminescent display device including the display panel, the display panel having a structure that prevents damage to the electrode pattern due to static electricity between the auxiliary electrode and the electrode pattern disposed between the embankment and the insulating film.

[0010] Embodiments of this disclosure relate to a display panel and an electroluminescent display device including the display panel, the display panel having a structure that prevents the electrode pattern from oxidizing and deteriorating.

[0011] According to one embodiment of this disclosure, an electroluminescent display device can be provided, comprising: at least one auxiliary electrode disposed on a substrate; a first insulating film disposed on the auxiliary electrode and including a first hole exposing a portion of the upper surface of the auxiliary electrode; a second insulating film disposed on the first insulating film and including a second hole overlapping the first hole; an electrode pattern disposed on a portion of the upper surface of the first insulating film and overlapping the second hole of the second insulating film; a first electrode of a light-emitting device disposed on the second insulating film; a dam overlapping a portion of the upper surface of the first electrode and disposed on the second insulating film; a light-emitting layer of the light-emitting device disposed on the first electrode and the dam and disposed on a portion of the upper surface of the auxiliary electrode overlapping the first hole of the first insulating film; and a second electrode of the light-emitting device disposed on the light-emitting layer and in contact with a portion of the upper surface of the auxiliary electrode overlapping the first hole.

[0012] According to one embodiment of this disclosure, a display panel can be provided, the display panel comprising: at least one auxiliary electrode disposed on a substrate; a first insulating film disposed on the auxiliary electrode and including a first hole exposing a portion of the upper surface of the auxiliary electrode; a second insulating film disposed on the first insulating film and including a second hole overlapping the first hole and having an area larger than the first hole; an electrode pattern disposed on a portion of the upper surface of the first insulating film and overlapping the second hole of the second insulating film; a first electrode of a light-emitting device disposed on the second insulating film; a dam overlapping a portion of the upper surface of the first electrode and disposed on the second insulating film; a light-emitting layer of a light-emitting device disposed on the first electrode and the dam and disposed on a portion of the upper surface of the auxiliary electrode; and a second electrode of a light-emitting device disposed on the light-emitting layer and in contact with a portion of the upper surface of the auxiliary electrode overlapping the first hole.

[0013] According to embodiments of the present disclosure, a display panel and an electroluminescent display device including the display panel can be provided. The display panel has the following structure: by including a first insulating film, a second insulating film, and a dam, the first insulating film includes a first hole overlapping with an auxiliary electrode, the second insulating film includes a second hole disposed on the first insulating film and having an area larger than the first hole, and the dam is disposed on the second insulating film and overlaps with a portion of the first hole, the cathode of the light-emitting device can be electrically connected to the auxiliary electrode without the need for an inverted conical barrier wall structure.

[0014] According to embodiments of the present disclosure, a display panel and an electroluminescent display device including the display panel can be provided. The display panel has the following structure: by arranging an electrode pattern between an insulating film and a dam in a region corresponding to a region where an auxiliary electrode is provided, separation between the insulating film and the dam in the region corresponding to the region where the auxiliary electrode is provided can be prevented.

[0015] According to embodiments of the present disclosure, a display panel and an electroluminescent display device including the display panel can be provided. The display panel has the following structure: since the auxiliary electrode and the electrode pattern do not overlap in the area overlapping with the first hole of the first insulating film, damage to the electrode pattern due to static electricity between the auxiliary electrode and the electrode pattern disposed between the embankment and the insulating film can be prevented.

[0016] According to embodiments of the present disclosure, a display panel and an electroluminescent display device including the display panel can be provided. The display panel has the following structure: by covering the entire upper surface and side surfaces of the electrode pattern with a dam, oxidation, deterioration and other damage to the electrode pattern can be prevented. Attached Figure Description

[0017] The above and other objects, features and advantages of this disclosure will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 This is a diagram schematically illustrating the system configuration of an electroluminescent display device according to an embodiment of the present disclosure;

[0019] Figure 2 This is a diagram illustrating the structure of sub-pixels in a display panel according to an embodiment of the present disclosure;

[0020] Figure 3 This is a plan view showing a portion of an electroluminescent display device according to an embodiment of the present disclosure;

[0021] Figure 4 It is along Figure 3 A cross-sectional view taken from lines AB and CD;

[0022] Figure 5 It is along Figure 3 A sectional view taken by line EF;

[0023] Figure 6 yes Figure 3 A magnified view of region X;

[0024] Figure 7 It is along Figure 6 A sectional view taken by line GH;

[0025] Figure 8 It is shown Figure 3 A diagram of another embodiment of region X;

[0026] Figure 9 It is along Figure 8 A sectional view taken from line IJ;

[0027] Figure 10 It is shown Figure 3 A diagram of another embodiment of region X;

[0028] Figure 11 It is along Figure 10 A cross-sectional view taken from line KL;

[0029] Figure 12 This is a diagram showing a portion of the active region of an electroluminescent display device according to another embodiment of the present disclosure;

[0030] Figure 13 It is along Figure 12 A cross-sectional view taken from lines MN and OP. Detailed Implementation

[0031] The following description of examples or embodiments of this disclosure will be made with reference to the accompanying drawings, in which specific examples or embodiments that can be implemented are illustrated by way of illustration, and the same reference numerals and symbols may be used to denote the same or similar components even when shown in different drawings. Furthermore, in the following description of examples or embodiments of this disclosure, a detailed description of well-known functions and components incorporated herein will be omitted where it is determined that such detailed description might obscure the subject matter of some embodiments of this disclosure. Terms such as “comprising,” “having,” “including,” “constituting,” “forming,” and “forming” as used herein are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise.

[0032] In this document, terms such as “first,” “second,” “A,” “B,” “(A),” or “(B)” may be used to describe elements of this disclosure. Each of these terms is not used to define the nature, order, sequence, or number of elements, but only to distinguish the corresponding element from other elements.

[0033] When it is mentioned that the first element is "connected or coupled to" the second element, or "in contact or overlaps" with the second element, it should be interpreted as meaning that not only can the first element be "directly connected or coupled to" the second element or "directly in contact or overlap" with the second element, but a third element can also be "inserted" between the first and second elements, or the first and second elements can be "connected or coupled," "in contact or overlap" with each other via a fourth element. Here, the second element can be included in at least one of two or more elements that are "connected or coupled," "in contact or overlap" with each other.

[0034] When time-related terms such as “after,” “following,” “next,” “before,” etc., are used to describe the process or operation of an element or configuration, or the flow or steps of an operation, process, or manufacturing method, these terms may be used to describe discontinuous or non-sequential processes or operations unless used with the terms “directly” or “immediately.”

[0035] Additionally, when referring to any size, relative dimensions, etc., it should be considered that even if no specific description is specified, the numerical values ​​or corresponding information of the component or feature (e.g., level, range, etc.) include tolerances or error ranges that may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.). Furthermore, the term "can" fully encompasses all the meanings of the term "able to".

[0036] Figure 1 This is a diagram schematically illustrating the system configuration of an electroluminescent display device according to an embodiment of the present disclosure.

[0037] An electroluminescent display according to embodiments of the present disclosure may include, for example, an electroluminescent display device 100, an illumination device, or a light-emitting device. Hereinafter, for ease of description, the electroluminescent display device 100 will be described primarily. However, embodiments of the present disclosure can also be applied to various other electroluminescent displays, such as illumination devices or light-emitting devices.

[0038] An electroluminescent display device 100 according to an embodiment of the present disclosure may include a display panel PNL for displaying images or outputting light and a driving circuit for driving the display panel PNL.

[0039] The electroluminescent display device 100 according to the embodiments of the present disclosure may be a bottom-emitting electroluminescent display device that emits light toward a substrate on which light-emitting devices are disposed, but the embodiments of the present disclosure are not limited thereto. In some cases, the electroluminescent display device 100 of the present disclosure may be a top-emitting electroluminescent display device that emits light away from a substrate on which light-emitting devices are disposed, or a double-sided emitting electroluminescent display device that emits light toward and away from the substrate.

[0040] The display panel PNL can have multiple data lines DL and multiple gate lines GL. The display panel PNL can have multiple sub-pixels SP defined by the multiple data lines DL and multiple gate lines GL in a matrix arrangement.

[0041] In a display panel PNL, multiple data lines DL and multiple gate lines GL can be arranged to intersect each other. For example, multiple gate lines GL can be arranged in rows or columns, and multiple data lines DL can be arranged in columns or rows. For ease of description, the following assumes that multiple gate lines GL are arranged in rows and multiple data lines DL are arranged in columns.

[0042] Depending on, for example, the subpixel structure, the display panel PNL can have other types of signal lines, as well as multiple data lines DL and multiple gate lines GL. The display panel PNL can also have drive power lines, reference power lines, or common power lines.

[0043] The type of signal line disposed on the panel PNL can vary depending on, for example, the sub-pixel structure. In this disclosure, the concept of a signal line can include electrodes for applying signals.

[0044] The display panel PNL may include an active area A / A for displaying pictures or images, and a non-active area N / A surrounding the active area A / A that does not display images. The non-active area N / A is also referred to as the border area.

[0045] The active region A / A includes multiple sub-pixels SP used to display the image.

[0046] The non-active region N / A has pad areas for electrical connection to the data driver DDR. The non-active region N / A may have multiple data link lines to connect the pad areas to multiple data lines DL. The multiple data link lines may be portions extending from the multiple data lines DL to the non-active region N / A, or they may be separate patterns electrically connected to the multiple data lines DL.

[0047] The non-active region N / A may also include lines associated with the gate drive to transmit the voltages (signals) required for the gate drive to the gate driver GDR via pads electrically connected to the data driver DDR. For example, lines associated with the gate drive may include clock lines for transmitting clock signals, gate power lines for transmitting gate voltages VGH and VGL, and gate drive control signal lines for transmitting various control signals required to generate scan signals. Unlike the gate line GL located in the active region A / A, the lines associated with the gate drive are located in the non-active region N / A.

[0048] The driving circuit may include a data driver DDR for driving multiple display devices, a gate driver GDR for driving multiple gate lines GL, and a controller CTR for controlling the data driver DDR and the gate driver GDR.

[0049] The data driver DDR can drive multiple data lines DL by outputting data voltage to multiple data lines DL.

[0050] The gate driver GDR can drive multiple gate lines GL by outputting scan signals to multiple gate lines GL.

[0051] The controller CTR can control the drive operation of the data driver DDR and the gate driver GDR by providing various control signals DCS and GCS required for their operation. Additionally, the controller CTR can supply image data DATA to the data driver DDR.

[0052] The controller CTR begins scanning according to the timing implemented in each frame. The controller CTR converts input image data from external input into image data DATA suitable for the data signal format used in the data driver DDR, outputs the image data DATA, and controls the data driver when appropriate for scanning.

[0053] To control the data driver DDR and the gate driver GDR, the controller CTR receives timing signals such as the vertical synchronization signal Vsync, the horizontal synchronization signal Hsync, the input data enable signal (Data Enable(DE)), or the clock signal CLK from an external source (e.g., the host system), and can generate various control signals. The controller CTR outputs the generated control signals to the data driver DDR and the gate driver GDR.

[0054] As an example, in order to control the gate driver GDR, the controller CTR outputs various gate control signals GCS, including the gate start pulse GSP, the gate shift clock GSC, and the gate output enable (GOE) signal.

[0055] To control the data driver DDR, the controller CTR output includes various data control signals DCS, such as the source start pulse SSP, the source sampling clock SSC, and the source output enable (SOE) signal.

[0056] The controller CTR can be a timing controller used in typical display technologies. Alternatively, the controller CTR can be a control device capable of further performing other control functions, including timing control.

[0057] The controller CTR can be implemented as a separate component from the data driver DDR. Alternatively, the controller CTR can be integrated into an integrated circuit with the data driver DDR.

[0058] The data driver DDR receives image data DATA from the controller CTR and provides data voltage to multiple data lines DL, thereby driving the multiple data lines DL. Here, the data driver DDR is also referred to as the source driver.

[0059] The data driver DDR can exchange various signals with the controller CTR through various interfaces.

[0060] The gate driver GDR drives multiple gate lines GL sequentially by providing scan signals to them. Here, the gate driver GDR is also referred to as a scan driver.

[0061] Under the control of the controller CTR, the gate driver GDR sequentially provides scan signals of turn-on or turn-off voltages to multiple gate lines GL.

[0062] When the gate driver GDR turns on a specific gate line, the data driver DDR converts the image data DATA received from the controller CTR into an analog data voltage and provides the analog data voltage to multiple data lines DL.

[0063] The data driver DDR can be located on one side of the display panel PNL (e.g., the top or bottom side). However, embodiments of this disclosure are not limited thereto. For example, depending on the driving scheme or display panel design, the data driver DDR can be located on both sides of the display panel PNL (e.g., both the top and bottom sides).

[0064] The gate driver (GDR) can be located on one side of the display panel PNL (e.g., the left or right side). However, embodiments of this disclosure are not limited thereto. For example, depending on the driving scheme or display panel design, the gate driver (GDR) can be located on both sides of the display panel PNL (e.g., both the left and right sides).

[0065] The data driver DDR may include one or more source driver integrated circuits SDIC.

[0066] Each source driver integrated circuit (SDIC) may include a shift register, latch circuitry, a digital-to-analog converter (DAC), and an output buffer. In some cases, the data driver (DDR) may also include one or more analog-to-digital converters (ADCs).

[0067] Each source driver integrated circuit (SDIC) can be connected to the bonding pads of the display panel PNL using either a tape-on-board (TAB) or chip-on-glass (COG) type. Alternatively, each source driver integrated circuit (SDIC) can be directly disposed on the display panel PNL. In some cases, each source driver integrated circuit (SDIC) can be integrated and disposed on the display panel PNL. Each source driver integrated circuit (SDIC) can be implemented using a chip-on-film (COF) type. In this case, each source driver integrated circuit (SDIC) can be mounted on a circuit film. Each source driver integrated circuit (SDIC) mounted on the circuit film can be electrically connected to the data line DL of the display panel PNL via the circuit film.

[0068] A gate driver (GDR) may include multiple gate drive circuits (GDCs). These multiple gate drive circuits may each correspond to multiple gate lines (GLs).

[0069] Each gate drive circuit (GDC) may include, for example, a shift register and a level shifter.

[0070] Each gate drive circuit (GDC) can be connected to the bonding pads of the display panel PNL in either TAB or COG type. Each gate drive circuit (GDC) can also be implemented as a chip-on-film (COF) type. In this case, each gate drive circuit (GDC) can be mounted on the circuit film. Each gate drive circuit (GDC) mounted on the circuit film can be electrically connected to the gate line GL of the display panel PNL via the circuit film. Alternatively, each gate drive circuit (GDC) can be implemented as a gate-in-panel (GIP) type and embedded within the display panel PNL. Therefore, each gate drive circuit (GDC) can be directly formed on the display panel PNL.

[0071] Figure 2 This is a diagram illustrating the structure of subpixels in a display panel according to an embodiment of the present disclosure.

[0072] refer to Figure 2 Each sub-pixel SP in the display panel PNL may also include a second transistor T2 that transmits the data voltage Vdata to a first node N1 corresponding to the gate node of the driving transistor T1, and a storage capacitor Cst for holding the data voltage Vdata corresponding to the image signal voltage or the voltage corresponding to the data voltage Vdata within a frame time.

[0073] A light-emitting device (LED) may include a first electrode (anode or cathode), an organic layer including at least one light-emitting layer, and a second electrode (cathode or anode).

[0074] For example, the base voltage EVSS or a low supply voltage can be applied to the second electrode of the LED light-emitting device.

[0075] The driving transistor T1 drives the organic light-emitting device LED by providing driving current to the LED.

[0076] The driving transistor T1 includes a first node N1, a second node N2, and a third node N3.

[0077] The “nodes” in the first to third nodes N1, N2 and N3 can represent points, electrodes or wirings with the same electrical state.

[0078] Each of the first node N1, the second node N2, and the third node N3 may include one or more electrodes.

[0079] The first node N1 of the driving transistor T1 is the node corresponding to the gate node and can be electrically connected to the source node or drain node of the second transistor T2.

[0080] The second node N2 of the driving transistor T1 can be electrically connected to the first electrode 301 of the light-emitting device LED and can be a source node or a drain node.

[0081] The third node N3 of the driving transistor T1 is the node to which the driving voltage EVDD is applied and can be electrically connected to the driving voltage line DVL that provides the driving voltage EVDD. The third node N3 of the driving transistor T1 can be a drain node or a source node.

[0082] The driving transistor T1 and the second transistor T2 can be implemented as n-type or p-type.

[0083] The second transistor T2 can be electrically connected between the data line DL and the first node N1 of the drive transistor T1, and can be controlled by receiving the scan signal SCAN via the gate line and the gate node.

[0084] The second transistor T2 can be turned on by the scan signal SCAN to transmit the data voltage Vdata provided from the data line DL to the first node N1 of the driving transistor T1.

[0085] The storage capacitor Cst can be electrically connected between the first node N1 and the second node N2 of the driving transistor T1.

[0086] The storage capacitor Cst is an external capacitor intentionally designed to be located outside the driving transistor T1, rather than a parasitic capacitor (e.g., Cgs or Cgd) existing as an internal capacitor between the first node N1 and the second node N2 of the driving transistor T1.

[0087] The third transistor T3 can be electrically connected between the second node N2 of the driving transistor T1 and the reference voltage line RVL, and receive the second scan signal SCAN2 through the gate node to control its on / off state.

[0088] The drain node of the third transistor T3 can be electrically connected to the reference voltage line RVL, and the source node of the third transistor T3 can be electrically connected to the second node N2 of the driving transistor T1. Alternatively, the source node of the third transistor T3 can be electrically connected to the reference voltage line RVL, and the drain node of the third transistor T3 can be electrically connected to the second node N2 of the driving transistor T1.

[0089] For example, the third transistor T3 can be turned on during the display driving time period, and also during the sensing driving time period for sensing the characteristic value of the driving transistor T1 or the characteristic value of the light-emitting device LED.

[0090] The third transistor T3 can be turned on by the second scan signal SCAN2 according to the driving timing (e.g., the display driving timing or the initialization timing during the sensing driving period). The third transistor T3, turned on by the second scan signal SCAN2, can transfer the reference voltage Vref provided to the reference voltage line RVL to the second node N2 of the driving transistor T1.

[0091] The third transistor T3 can be turned on by the second scan signal SCAN2 according to the driving timing (e.g., the sampling timing during the sensing driving period). The third transistor T3, turned on by the second scan signal SCAN2, can transfer the voltage of the second node N2 of the driving transistor T1 to the reference voltage line RVL.

[0092] Therefore, the third transistor T3 can control the voltage state of the second node N2 of the driving transistor T1, or can transmit the voltage of the second node N2 of the driving transistor T1 to the reference voltage line RVL.

[0093] The reference voltage line RVL can be electrically connected to an analog-to-digital converter (ADC) that senses the voltage of the reference voltage line RVL, converts the voltage into a digital value, and outputs sensed data including the digital value.

[0094] Analog-to-digital converters can be included in the source driver integrated circuit SDIC that implements the data driver DDR.

[0095] The sensing data output from the analog-to-digital converter can be used to sense the characteristic values ​​of the driving transistor T1 (e.g., threshold voltage or mobility) or the characteristic values ​​of the light-emitting device LED (e.g., threshold voltage).

[0096] Each of the driving transistor T1, the second transistor T2, and the third transistor T3 can be an n-type transistor or a p-type transistor.

[0097] The first scan signal SCAN1 and the second scan signal SCAN2 can be separate gate signals. In this case, the first scan signal SCAN1 and the second scan signal SCAN2 can be applied to the gate node of the second transistor T2 and the gate node of the third transistor T3 respectively through different gate lines.

[0098] In some cases, the first scan signal SCAN1 and the second scan signal SCAN2 can be the same gate signal. In this case, the first scan signal SCAN1 and the second scan signal SCAN2 can be applied together to the gate node of the second transistor T2 and the gate node of the third transistor T3 through the same gate line.

[0099] Figure 2 The structure of each subpixel shown is merely an example for description and may also include one or more transistors, or in some cases, one or more storage capacitors.

[0100] Multiple subpixels can have the same structure, or some of the subpixels can have different structures.

[0101] Figure 3 This is a plan view showing a portion of an electroluminescent display device according to an embodiment of the present disclosure.

[0102] refer to Figure 3 According to embodiments of this disclosure, a plurality of sub-pixels SP1, SP2, SP3, and SP4 may be disposed in the active region AA of the electroluminescent display device 100. Each of the sub-pixels SP1, SP2, SP3, and SP4 may include at least one light-emitting region and at least one transmissive region.

[0103] For example, the first sub-pixel SP1 may include a first light-emitting region EA1 and a first transmission region TA1, the second sub-pixel SP2 may include a second light-emitting region EA2 and a second transmission region TA2, the third sub-pixel SP3 may include a third light-emitting region EA3 and a third transmission region TA3, and the fourth sub-pixel SP4 may include a fourth light-emitting region EA4 and a fourth transmission region TA4.

[0104] The first sub-pixel SP1, the second sub-pixel SP2, the third sub-pixel SP3, and the fourth sub-pixel SP4 may be included in a single pixel, but this disclosure is not limited thereto. The electroluminescent display device 100 according to embodiments of this disclosure may have any structure in which a single pixel comprises two or more sub-pixels.

[0105] The first luminescent region EA1 can be a region that emits green light, the second luminescent region EA2 can be a region that emits blue light, the third luminescent region EA3 can be a region that emits white light, and the fourth luminescent region EA4 can be a region that emits red light, but the embodiments disclosed herein are not limited thereto.

[0106] At least two of the first to fourth luminescent regions EA1, EA2, EA3 and EA4 may be different in size from each other. In some cases, the first to fourth luminescent regions EA1, EA2, EA3 and EA4 may have the same size.

[0107] An electroluminescent display device 100 according to an embodiment of the present disclosure may include a plurality of signal lines.

[0108] Specifically, the electroluminescent display device 100 may include: a first voltage line 311 extending along a first direction; first to fourth data lines DL1, DL2, DL3 and DL4; and a second voltage line 312. The first voltage line 311 may be a drive voltage line DVL that provides a drive voltage, and the second voltage line 312 may be a power line to which a base voltage or a low-potential power supply voltage is applied.

[0109] The electroluminescent display device 100 may include at least one connection line 313 electrically connected to a first voltage line 311, the connection line 313 extending along a second direction intersecting the first direction. The connection line 313 may be electrically connected to a driving transistor disposed in each sub-pixel.

[0110] The electroluminescent display device 100 may include a first gate line GL1 and a second gate line GL2 extending along a second direction.

[0111] Each signal line can be connected to the pad electrode in the pad area located in the non-active area.

[0112] The first voltage line 311, the first to fourth data lines DL1, DL2, DL3 and DL4, and the second voltage line 312 can be disposed on a different layer than the first gate line GL1 and the second gate line GL2.

[0113] Although not in Figure 3 As shown in the figure, the electroluminescent display device 100 may also include a reference voltage line extending along the first direction.

[0114] Figure 3 The arrangement of the multiple signal lines shown is merely an example; the multiple data lines, multiple gate lines, first voltage line 311, second voltage line 312, and reference voltage line can be arranged in various other ways.

[0115] Multiple light-emitting areas EA can be set between the first voltage line 311 and the second voltage line 312.

[0116] For example, at least one first light-emitting region EA1, at least one second light-emitting region EA2, at least one third light-emitting region EA3 and at least one fourth light-emitting region EA4 may be disposed between a first voltage line 311 and a second voltage line 312, but the embodiments of this disclosure are not limited thereto.

[0117] For example, the first light-emitting region EA1 and the second light-emitting region EA2 may overlap with a portion of the first voltage line 311, and the third light-emitting region EA3 and the fourth light-emitting region EA4 may overlap with a portion of the second voltage line 312.

[0118] In some cases, multiple light-emitting regions EA1, EA2, EA3 and EA4 can be arranged between the first to fourth data lines DL1, DL2, DL3 and DL4 located between a first voltage line 311 and a second voltage line 312.

[0119] For example, a first light-emitting region EA1 and a second light-emitting region EA2, spaced apart from each other, can be disposed between a first data line DL1 and a second data line DL2, and a third light-emitting region EA3 and a fourth light-emitting region EA4, also spaced apart from each other, can be disposed between a third data line DL3 and a fourth data line DL4. However, the embodiments disclosed herein are not limited thereto.

[0120] Each of the first light-emitting region EA1 and the second light-emitting region EA2 may overlap with the first data line DL1 and the second data line DL2, and each of the third light-emitting region EA3 and the fourth light-emitting region EA4 may overlap with the third data line DL3 and the fourth data line DL4.

[0121] The first luminous region EA1 and the second luminous region EA2 can be arranged along the first direction, and the third luminous region EA3 and the fourth luminous region EA4 can also be arranged along the first direction.

[0122] Although not shown in the figure, multiple transistors, at least one storage capacitor, and light-emitting devices may be disposed in the regions that overlap with each of the first to fourth light-emitting regions EA1, EA2, EA3, and EA4.

[0123] For example, combining Figure 2 The described driving transistor T1, second transistor T2, and third transistor T3, as well as a storage capacitor Cst, can be disposed in each of the first to fourth light-emitting regions EA1, EA2, EA3, and EA4.

[0124] The transmission region TA can be set on one side of the first voltage line 311 and one side of the second voltage line 312.

[0125] For example, the first transmission region TA1 and the second transmission region TA2 can be disposed on one side of the first voltage line 311. The third transmission region TA3 and the fourth transmission region TA4 can be disposed on one side of the second voltage line 312.

[0126] The first transmission region TA1 and the second transmission region TA2 can be arranged along the first direction, and the third transmission region TA3 and the fourth transmission region TA4 can also be arranged along the first direction.

[0127] Electroluminescent displays can be top-emitting, bottom-emitting, or double-sided emitting. Regardless of the type of emission, large display panels with large cathodes can cause a voltage drop (IR drop) in the cathode of the light-emitting device.

[0128] Specifically, if the cathode may comprise a transparent conductive material, such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium gallium zinc oxide (IGZO), the cathode resistance increases. This results in a significant voltage drop, leading to reduced brightness in the central portion of the display panel compared to the edges.

[0129] An electroluminescent display device 100 according to an embodiment of the present disclosure may include an auxiliary electrode 330 in contact with the cathode of a light-emitting device to prevent the brightness of the central portion of the display panel from decreasing due to a voltage drop caused by the cathode.

[0130] The auxiliary electrode 330 can be connected to the auxiliary line 331 branching from the second voltage line 312.

[0131] The cathode of the light-emitting device can be in contact with a portion of the upper surface of the auxiliary electrode 330. Therefore, the resistance of the cathode of the light-emitting device can be reduced.

[0132] although Figure 3 The diagram shows a configuration where one auxiliary electrode 330 is provided for every four sub-pixels (each pixel), but the configuration of the electroluminescent display device 100 according to embodiments of this disclosure is not limited thereto. For example, one auxiliary electrode 330 may be provided for every eight or more sub-pixels.

[0133] According to embodiments of the present disclosure, a portion of the auxiliary electrode 330 and auxiliary line 331 of the electroluminescent display device 100 connected to the auxiliary electrode 330 may be disposed in the transmission region TA. For example, as Figure 3 As shown, the auxiliary line 331 may overlap with a portion of the third transmission region TA3 disposed on one side of the second voltage line 312.

[0134] Since the auxiliary line 331 and the auxiliary electrode 330 occupy a very small proportion of the third transmission region TA3, the transmittance of the third transmission region TA3 will not be affected by the auxiliary line 331 and the auxiliary electrode 330.

[0135] The light-emitting device may include an anode 390 (or a first electrode), a light-emitting layer 495, and a cathode (or a second electrode) 497. The cathode 497 of the light-emitting device may contact the upper surface of the auxiliary electrode 330 and is therefore electrically connected to the auxiliary electrode 330. Thus, it is possible to prevent the cathode from not contacting the auxiliary electrode 330 because the upper surface of the auxiliary electrode 330 is covered by the light-emitting layer disposed below the cathode.

[0136] After the light-emitting layer of the light-emitting device is formed, the upper surface of the auxiliary electrode 330 needs to be exposed so that the upper surface of the auxiliary electrode 330 can be connected to the cathode. Therefore, in order to prevent the upper surface of the auxiliary electrode 330 from being covered by the light-emitting layer, an inverted conical barrier wall can be provided on the auxiliary electrode 330.

[0137] However, due to the difficulty in forming such an inverted conical barrier wall and the low adhesion between the barrier wall and the auxiliary electrode 330, the barrier wall may separate from the upper surface of the auxiliary electrode 330, or the barrier wall may collapse. If the barrier wall is defective, the light-emitting layer may cover the upper surface of the auxiliary electrode 330, causing the cathode 330 to fail to maintain contact with the upper surface of the auxiliary electrode 330. Therefore, it may be difficult to connect the auxiliary electrode 330 and the cathode.

[0138] The electroluminescent display device 100 according to an embodiment of the present disclosure prevents the light-emitting layer from being disposed on a portion of the upper surface of the auxiliary electrode 330 by arranging an insulating film on the substrate, rather than forming a barrier wall on the auxiliary electrode 330. Since the portion of the upper surface of the auxiliary electrode 330 where the light-emitting layer is not disposed can contact the cathode, voltage drop in the cathode can be prevented.

[0139] The arrangement of the auxiliary electrode 330 and the components disposed on the auxiliary electrode in the electroluminescent display device 100 according to embodiments of the present disclosure is discussed below.

[0140] Figure 4 It is along Figure 3 A sectional view taken from lines AB and CD.

[0141] Figure 3 AB is a line that cuts through a portion of the third light-emitting region EA3 and the third transmission region TA3 located in the active region. Figure 3 The CD is a line along which the pad electrodes are cut in the pad area of ​​the non-active region.

[0142] refer to Figure 4 The active region AA may include the third emitting region EA3 and the third transmitting region TA3.

[0143] like Figure 4As shown, a non-light-emitting region may exist between the third light-emitting region EA3 and the third transmission region TA3.

[0144] The transistor and the light-emitting device LED can be disposed in the third light-emitting region EA3. A portion of the auxiliary line 331 can be disposed in the third transmission region TA3.

[0145] The non-active region may include the pad region PA, and the pad electrodes 470 and 480 may be disposed in the pad region PA.

[0146] The structure of the active region AA is described in detail below.

[0147] The light blocking layer 410 and the third voltage line 420 can be disposed on the substrate 400.

[0148] The light-blocking layer 410 can be used to block light from entering the active layer 426 of the transistor, and the third voltage line 420 can be used to apply a low voltage to the cathode of the light-emitting device LED.

[0149] The light-blocking layer 410 and the third voltage line 420 can be disposed on the same layer and can include the same material.

[0150] Specifically, the light blocking layer 410 may include a lower light blocking layer 411 disposed on the substrate 400 and an upper light blocking layer 412 disposed on the lower light blocking layer 411.

[0151] The third voltage line 420 may include a first lower voltage line 421 disposed on the substrate 400 and a first upper voltage line 422 disposed on the first lower voltage line 421.

[0152] The lower light-blocking layer 411 and the first lower voltage line 421 may comprise the same material, and the upper light-blocking layer 412 and the first upper voltage line 422 may comprise the same material. The lower light-blocking layer 411, the upper light-blocking layer 412, the first lower voltage line 421, and the first upper voltage line 422 may comprise, but are not limited to, any one of aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), titanium (Ti), or alloys of the aforementioned metals.

[0153] although Figure 4 The diagram shows a structure in which the light-blocking layer 410 and the third voltage line 420 have a double-layer structure, but the embodiments of this disclosure are not limited thereto. For example, the light-blocking layer 410 and the third voltage line 420 may be formed from a single layer or three or more layers.

[0154] The buffer layer 401 can be disposed on the light blocking layer 410 and the third voltage line 420. The buffer layer 401 can also be disposed in the third light-emitting region EA3 and the third transmission region TA3.

[0155] Buffer layer 401 may include an inorganic insulating material, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon oxynitride (SiO) x N y However, this disclosure is not limited thereto.

[0156] A transistor comprising an active layer 426, a gate electrode 440, a source electrode 450, and a drain electrode 460 can be disposed on a buffer layer 401. The transistor disposed on the buffer layer 401 can be... Figure 2 The driving transistor T1 is shown in the figure.

[0157] The active layer 426 can be formed on the buffer layer 401.

[0158] The active layer 426 can be formed from silicon-based semiconductor materials or oxide-based semiconductor materials.

[0159] The gate insulating film 402 can be disposed on the active layer 426. Specifically, the gate insulating film 402 can be disposed on a portion of the upper surface of the active layer 426.

[0160] The gate insulating film 402 may include an inorganic insulating material, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon oxynitride (SiO) x N y However, this disclosure is not limited thereto.

[0161] The gate electrode 440 can be disposed on the gate insulating film 402.

[0162] The gate electrode 440 may include a lower gate electrode 441 disposed on the gate insulating film 402 and an upper gate electrode 442 disposed on the lower gate electrode 441.

[0163] The lower gate electrode 441 and the upper gate electrode 442 may comprise any one of a metal or an alloy of the aforementioned metals, such as aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), and titanium (Ti), but this disclosure is not limited thereto.

[0164] The interlayer insulating film 403 can be disposed on a substrate on which the gate electrode 440 is disposed. The interlayer insulating film 403 can be disposed in the third light-emitting region EA3 and the third transmission region TA3.

[0165] Interlayer insulating film 403 may include inorganic insulating materials, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x) or silicon oxynitride (SiO) x N y However, this disclosure is not limited thereto.

[0166] The source electrode 450 and drain electrode 460 of the transistor can be disposed on the interlayer insulating film 403 and can be spaced apart from each other.

[0167] Each of the source electrode 450 and the drain electrode 460 can contact a portion of the upper surface of the active layer 426 through a contact hole provided in the interlayer insulating film 403.

[0168] The source electrode 450 can contact a portion of the upper surface of the light-blocking layer 410 through another contact hole disposed in the interlayer insulating film 403 and the buffer layer 401. In other words, the source electrode 450 and the light-blocking layer 410 can be electrically connected.

[0169] When the light-blocking layer 410, which includes conductive material, is in a floating state, the threshold voltage of the transistor overlapping with the light-blocking layer 410 changes, potentially causing the transistor to malfunction. According to embodiments of this disclosure, since the electrode 450 and the light-blocking layer 410 are electrically connected to each other, malfunction of the transistor overlapping with the light-blocking layer 410 can be prevented.

[0170] The source electrode 450 of the transistor may include a first source electrode 451 disposed on the interlayer insulating film 403, a second source electrode 452 disposed on the first source electrode 451, and a third source electrode 453 disposed on the second source electrode 452.

[0171] The drain electrode 460 of the transistor may include a first drain electrode 461 disposed on the interlayer insulating film 403, a second drain electrode 462 disposed on the first drain electrode 461, and a third drain electrode 463 disposed on the second drain electrode 462.

[0172] A fourth data line DL4, spaced apart from the source electrode 450 and drain electrode 460 of the transistor, can be disposed on the interlayer insulating film 403.

[0173] The fourth data line DL4 may include a lower data line 446 disposed on the interlayer insulating film 403, an upper data line 447 disposed on the lower data line 446, and a cover data line 448 disposed on the upper data line 447.

[0174] A second voltage line 312, spaced apart from the fourth data line DL4, can be disposed on the interlayer insulating film 403.

[0175] The second voltage line 312 may overlap with the third voltage line 420. The second voltage line 312 may be electrically connected to the third voltage line 420 through contact holes provided in the interlayer insulating film 403 and the buffer layer 401.

[0176] The second voltage line 312 may include a second lower voltage line 434 disposed on the interlayer insulating film 403, a second upper voltage line 435 disposed on the second lower voltage line 434, and a covering voltage line 436 disposed on the second upper voltage line 435.

[0177] An auxiliary line 331 integrated with the second voltage line 312 can be set in a portion of the third transmission region TA3.

[0178] The auxiliary line 331 can be set not only in the third transmission region TA3, but also in a part of the third light-emitting region EA3. If the non-light-emitting region is set between the third light-emitting region EA3 and the third transmission region TA3, then the auxiliary line 331 can also be set in the non-light-emitting region between the third light-emitting region EA3 and the third transmission region TA3.

[0179] The auxiliary line 331 may include a first auxiliary line 431 integrated with the second lower voltage line 434 of the second voltage line 312, a second auxiliary line 432 integrated with the second upper voltage line 435 of the second voltage line 312, and a third auxiliary line 433 integrated with the covering voltage line 436.

[0180] The source electrode 450, drain electrode 460, fourth data line DL4, second voltage line 312 and auxiliary line 331 may include, but are not limited to, any one of aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), titanium (Ti) or alloys of the aforementioned metals.

[0181] although Figure 4 The diagram shows a structure in which each of the source electrode 450, drain electrode 460, fourth data line DL4, second voltage line 312, and auxiliary line 331 has a three-layer structure, but this disclosure is not limited thereto. For example, each of the source electrode 450, drain electrode 460, fourth data line DL4, second voltage line 312, and auxiliary line 331 may have a single-layer, double-layer, four-layer, or more-layer structure.

[0182] The first insulating film 340 can be disposed on a substrate 400 on which the active electrode 450, the drain electrode 460, the fourth data line DL4, the second voltage line 312 and the auxiliary line 331 are disposed.

[0183] The first insulating film 340 can be disposed in the third light-emitting region EA3 and the third transmission region TA3.

[0184] The first insulating film 340 may include an inorganic insulating material, such as silicon oxide (SiO2). x ), silicon nitride (SiN) x ) or silicon oxynitride (SiO) xN y ).

[0185] The second insulating film 350 can be disposed on the first insulating film 340.

[0186] The second insulating film 350 can be disposed in the third light-emitting region EA3 and the third transmission region TA3.

[0187] The second insulating film 350 may be formed of an insulating material such as acrylic resin, epoxy resin, phenolic resin, polyamide resin or polyimide resin, but the embodiments of this disclosure are not limited thereto.

[0188] The first electrode 490 (anode) of the light-emitting device LED can be disposed on a portion of the upper surface of the second insulating film 350 in the third light-emitting region EA3.

[0189] The first electrode 390 may include a lower electrode 491 disposed on the second insulating film 350, an upper electrode 492 disposed on the lower electrode 491, and a cover electrode 493 disposed on the upper electrode 492.

[0190] The lower electrode 491 and the cap electrode 493 of the first electrode 390 may comprise a transparent conductive material. For example, each of the lower electrode 491 and the cap electrode 493 may comprise any one of ITO, IZO, and IGZO, but the embodiments of this disclosure are not limited thereto.

[0191] The upper electrode 492 of the first electrode 390 may include a reflective material. For example, the upper electrode 492 may be formed of silver (Ag), aluminum (Al), copper (Cu), nickel (Ni), palladium (Pd), or an alloy of the aforementioned metals, but the embodiments of this disclosure are not limited thereto.

[0192] The embankment 360 can be disposed on a portion of the upper surface of the first electrode 390 of the light-emitting device LED and the second insulating film 350.

[0193] The embankment 360 can define the light-emitting and non-light-emitting areas in the active area AA instead of in the transmission area, and the area where the embankment 360 is provided can be a non-light-emitting area, while the area where the embankment 360 is not provided can be a light-emitting area.

[0194] The embankment 360 may be formed of an organic insulating material such as polyimide resin, acrylic resin or benzocyclobutene (BCB), but the embodiments disclosed herein are not limited thereto.

[0195] The light-emitting layer 495 of the light-emitting device LED can be disposed on the embankment 360 and the first electrode 390.

[0196] although Figure 4The light-emitting layer 495 is shown to be a single-layer structure, but the embodiments of this disclosure are not limited thereto, and the light-emitting layer 495 can be formed into a multi-layer structure.

[0197] The second electrode 497 (cathode) of the light-emitting device LED can be disposed on the light-emitting layer 495.

[0198] The second electrode 497 may include a transparent conductive material. For example, the second electrode 497 may include any one of ITO, IZO and IGZO, but the embodiments of this disclosure are not limited thereto.

[0199] As described above, since the first electrode 390 of the light-emitting device LED includes an electrode containing a reflective material and the second electrode 497 includes a transparent conductive material, light emitted from the light-emitting layer 495 of the light-emitting device LED can be directed towards the second electrode 497. The electroluminescent display device 100 according to an embodiment of this disclosure can be a top-emitting type electroluminescent display device.

[0200] As described above, although the present disclosure primarily describes a top-emitting electroluminescent display device 100, the embodiments of the present disclosure are not limited thereto, but can be applied to all other types of display devices to prevent voltage drop at the cathode.

[0201] The light-emitting layer 495 and the second electrode 497 of the light-emitting device LED can be disposed in the light-emitting area and the non-light-emitting area of ​​the active area AA of the electroluminescent display device 100, and can also be disposed in a part of the transmission area.

[0202] Despite the combination Figure 4 The main description focuses on the structure of the third light-emitting region EA3, the non-light-emitting region NEA surrounding the third light-emitting region EA3, and the third transmissive region TA3 adjacent to the third light-emitting region EA3. However, the structure of the third light-emitting region EA3, the non-light-emitting region, and the third transmissive region TA3 can be applied to other light-emitting regions, non-light-emitting regions, and transmissive regions of the electroluminescent display device 100 according to embodiments of this disclosure.

[0203] The pad electrodes 470 and 480 can be disposed in the pad area PA in the non-active area of ​​the electroluminescent display device 100.

[0204] Specifically, the first pad electrode 470 can be disposed on the substrate 400.

[0205] The first pad electrode 470 can be disposed on the same layer as the light blocking layer 410 and the third voltage line 420 disposed in the active region AA.

[0206] The first pad electrode 470 may include a first lower pad electrode 471 and a first upper pad electrode 472 disposed on the first lower pad electrode 471.

[0207] Both the first lower pad electrode 471 and the first upper pad electrode 472 may comprise any one of a metal or an alloy of the aforementioned metals, such as aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), and titanium (Ti), but this disclosure is not limited thereto.

[0208] The buffer layer 401 can be disposed on the first pad electrode 470.

[0209] The interlayer insulating film 403 can be disposed on the buffer layer 401.

[0210] The second pad electrode 480 can be disposed on the interlayer insulating film 403.

[0211] The second pad electrode 480 can be disposed on the same layer as the source electrode 450, drain electrode 460, fourth data line DL4, second voltage line 312 and auxiliary line 331 disposed in the active region AA.

[0212] The second pad electrode 480 may include a second lower pad electrode 481 disposed on the interlayer insulating film 403, a second upper pad electrode 482 disposed on the second lower pad electrode 481, and a cover pad electrode 483 disposed on the second upper pad electrode 482.

[0213] The second lower pad electrode 481, the second upper pad electrode 482, and the cover pad electrode 483 may each include any one of a metal such as aluminum (Al), gold (Au), silver (Ag), copper (Cu), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), and titanium (Ti), or an alloy of the aforementioned metals, but this disclosure is not limited thereto.

[0214] The second pad electrode 480 can be electrically connected to the first pad electrode 470 through contact holes provided in the interlayer insulating film 403 and the buffer layer 401.

[0215] The first insulating film 340 can be disposed on the second pad electrode 480.

[0216] The first insulating film 340 may include contact holes that expose a portion of the upper surface of the second pad electrode 480.

[0217] The second pad electrode 480 can be electrically connected to an external circuit (e.g., a printed circuit board or circuit film) through a contact hole provided in the first insulating film 340.

[0218] although Figure 4The diagram shows a structure in which the auxiliary line 313 is disposed in a portion of the third transmission region TA3, but the multiple transmission regions of the electroluminescent display device 100 according to embodiments of the present disclosure may include regions in which the auxiliary line 313 is not disposed.

[0219] This is for reference below. Figure 5 Describe it.

[0220] Figure 5 It is along Figure 3 The sectional view taken by line EF.

[0221] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0222] refer to Figure 5 According to an embodiment of the present disclosure, the third transmission region TA3 of the electroluminescent display device 100 may include a region having the following layers or films: a buffer layer 401 disposed on a substrate 400, an interlayer insulating film 403 disposed on the buffer layer 401, and a first insulating film 340 disposed on the interlayer insulating film 403.

[0223] In other words, the third transmission region TA3 may include areas where components (e.g., multiple electrodes and wires) that would reduce the transmittance of the third transmission region TA3 are not provided.

[0224] although Figure 5 The invention illustrates a structure in which an insulating film containing an inorganic insulating material is disposed on a substrate 400. However, the embodiments disclosed herein are not limited thereto, and an insulating film containing an organic insulating material that does not reduce transmittance may also be disposed.

[0225] In other words, such as Figure 3 As shown, the third transmission region TA3 may include a region on the substrate 400 with at least one insulating film disposed thereon, and a region with an auxiliary line 331 and an auxiliary electrode 330 integral with the auxiliary line 331 disposed thereon.

[0226] An electroluminescent display device 100 according to an embodiment of the present disclosure may include a transmissive region without auxiliary lines 331 and auxiliary electrodes 330 (e.g., Figure 3 The first transmission region TA1, the second transmission region TA2, and the fourth transmission region TA4).

[0227] The first insulating film 340, the second insulating film 350, the embankment 360, the light-emitting layer 495 of the light-emitting device LED, the second insulating film 350, and the electrode pattern can be disposed on a portion of the upper surface of the auxiliary electrode 330 disposed in the third transmission region TA3.

[0228] This is for reference below. Figures 6 to 11 Let's have a discussion.

[0229] Figure 6 yes Figure 3 A magnified view of region X.

[0230] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0231] refer to Figure 6 The first insulating film 340, the second insulating film 350, the embankment 360, the light-emitting layer of the light-emitting device LED, the second electrode, and the electrode pattern 690 can be disposed on the auxiliary electrode 330 disposed in a portion of the third transmission region TA3.

[0232] Specifically, the first insulating film 340 may be disposed on a portion of the upper surface of the auxiliary electrode 330, which is integral with the auxiliary line 331.

[0233] The first insulating film 340 may include a first hole H1 that exposes a portion of the upper surface of the auxiliary electrode 330. In other words, in the region where the first insulating film 340 has the first hole H1, the first insulating film 340 and the auxiliary electrode 330 may not overlap.

[0234] A second insulating film 350 having a second hole H2 overlapping the first hole H1 of the first insulating film 340 can be disposed on the auxiliary electrode 330. The second insulating film 350 can expose a portion of the upper surface of the auxiliary electrode 330 through the second hole H2.

[0235] In the plan view, the area of ​​the second hole H2 of the second insulating film 350 can be larger than the area of ​​the first hole H1 of the first insulating film 340. Therefore, the second hole H2 of the second insulating film 350 can also expose a portion of the upper surface of the first insulating film 340.

[0236] In other words, in the region where the second insulating film 350 is formed in the second hole H2, the second insulating film 350 and the first insulating film 340 may not overlap.

[0237] An electrode pattern 690 that overlaps with a portion of the upper surface of the first insulating film 340 may be disposed on the auxiliary electrode 330.

[0238] A portion of the side of the electrode pattern 690 may contact the second insulating film 350. The electrode pattern 690 and the second insulating film 350 may be configured to expose a portion of the upper surface of the first insulating film 340 adjacent to the first hole H1.

[0239] The embankment 360, which overlaps with the first insulating film 340, the second insulating film 350 and the electrode pattern 690, can overlap with a portion of the first hole H1 of the first insulating film 340 and a portion of the second hole H2 of the second insulating film 350 and can be disposed on the auxiliary electrode 330.

[0240] The embankment 360 may include a third hole H3 that exposes a portion of the upper surface of the auxiliary electrode 330. The third hole H3 of the embankment 360 may overlap with a portion of the first hole H1 of the first insulating film 340 and a portion of the second hole H2 of the second insulating film 350.

[0241] The embankment 360 may overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340 and the second hole H2 of the second insulating film 350.

[0242] Although not in Figure 6 As shown, the light-emitting layer and the second electrode of the LED can be disposed on the embankment 360. In the region where the first hole H1 is provided, the light-emitting layer and the second electrode of the LED can also be disposed on a portion of the upper surface of the auxiliary electrode 330.

[0243] The light-emitting layer of the LED device may not be disposed in the region where the upper surface of the auxiliary electrode 330 overlaps with the embankment 360 in the region of the first hole H1 of the first insulating film 340. Figure 6 In region Y).

[0244] In the region where the first insulating film 340 is provided, the light-emitting device LED is partially disposed in the region where the upper surface of the auxiliary electrode 330 overlaps with the embankment 360. Figure 6 In region Y). By setting the second electrode of the light-emitting device LED, the second electrode of the LED and the upper surface of the auxiliary electrode 330 can be in contact.

[0245] The following is for reference. Figure 7 Discuss the structure.

[0246] Figure 7 It is along Figure 6 The sectional view taken by line GH.

[0247] refer to Figure 7 The buffer layer 401 and the interlayer insulating film 403 can be disposed on the substrate 400, and the auxiliary electrode 330 can be disposed on the interlayer insulating film 403.

[0248] The auxiliary electrode 330 may include a first auxiliary electrode 731 disposed on the interlayer insulating film 403, a second auxiliary electrode 732 disposed on the first auxiliary electrode 731, and a third auxiliary electrode 733 disposed on the second auxiliary electrode 732.

[0249] The auxiliary electrode 330 can be set at the same position as... Figure 4 The source electrode 450, drain electrode 460, fourth data line DL4, second voltage line 312, auxiliary line 331, and second pad electrode 480 shown are on the same layer.

[0250] The first insulating film 340 may be disposed on a portion of the upper surface of the auxiliary electrode 330.

[0251] The first insulating film 340 may include a first hole H1 that exposes a portion of the upper surface of the auxiliary electrode 330.

[0252] The electrode pattern 690 and the second insulating film 350 can be disposed on a portion of the upper surface of the first insulating film 340.

[0253] The electrode pattern 690 may include a first electrode pattern 791 disposed on the first insulating film 340, a second electrode pattern 792 disposed on the first electrode pattern 791, and a third electrode pattern 793 disposed on the second electrode pattern 792.

[0254] The electrode pattern 690 can be formed using the same process as the first electrode of the light-emitting device LED.

[0255] The first electrode pattern 791 and the third electrode pattern 793 of the electrode pattern 690 may include a transparent conductive material. For example, each of the first electrode pattern 791 and the third electrode pattern 793 may include any one of ITO, IZO and IGZO, but the embodiments of this disclosure are not limited thereto.

[0256] The second electrode pattern 792 of electrode pattern 690 may include a reflective material. For example, the upper electrode 492 may be formed of silver (Ag), aluminum (Al), copper (Cu), nickel (Ni), palladium (Pd), or an alloy of the aforementioned metals, but the embodiments of this disclosure are not limited thereto.

[0257] The angle between the side of the electrode pattern 690 and the surface of the first insulating film 340 can be 90 degrees, but the embodiments of this disclosure are not limited to this, and depending on the process conditions, the angle between the side of the electrode pattern 690 and the surface of the first insulating film 340 can be less than 90 degrees.

[0258] The electrode pattern 690 may not overlap with the first hole H1 of the first insulating film 340. In other words, the electrode pattern 690 may not overlap with the auxiliary electrode 330, which overlaps with the first hole H1 of the first insulating film 340.

[0259] If the electrode pattern 690 overlaps with the auxiliary electrode 330 of the first hole H1 in the first insulating film 340, the electrode pattern 690 may be damaged or other defects may occur due to the potential difference (e.g., static electricity) between the electrode pattern 690 and the auxiliary electrode 330.

[0260] However, according to embodiments of this disclosure, in the electroluminescent display device 100, since the electrode pattern 690 does not overlap with the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340, damage to the electrode pattern 690 due to potential difference can be prevented. (See reference...) Figure 7 The two opposite ends of the electrode pattern 690 are disposed on the upper surface of the first insulating film 340. Therefore, the ends of the electrode pattern 690 are located further inside the side surface of the first insulating film 340.

[0261] The second insulating film 350 may include a second hole H2 that overlaps with the first hole H1 of the first insulating film 340 and exposes a portion of the upper surface of the first insulating film 340.

[0262] As described above, the electrode pattern 690 can be disposed on the first insulating film 340 and can also be disposed in the second hole H2 of the second insulating film 350.

[0263] A portion of the side of the electrode pattern 690 may contact a portion of the side of the second insulating film 350. For example, a portion of the side of the first electrode pattern 791 may contact a portion of the side of the second insulating film 350.

[0264] The embankment 360 can be disposed on a first insulating film 340 on which a second insulating film 350 and an electrode pattern 690 are disposed.

[0265] The embankment 360 may overlap with the second insulating film 350. The embankment 360 may overlap with the entire electrode pattern 690. (Reference) Figure 7 The lower surface of the electrode pattern 690 can be covered by the upper surface of the first insulating film 340, and one side and the upper surface of the electrode pattern 690 can be covered by the embankment 360. A portion of the other side of the electrode pattern 690 can contact the side of the second insulating film 350. The embankment 360 can be disposed in the space between the other side of the electrode pattern 690 and the side of the second insulating film 350. Therefore, the other side of the electrode pattern 690 can be covered by the second insulating film 350 and the embankment 360. Although not shown in the figures, the entire other side of the electrode pattern 690 can be completely contacted by the second insulating film 350, and therefore, the entire other side of the electrode pattern 690 can be covered by the second insulating film 350.

[0266] The embankment 360 can contact the upper surface of the first insulating film 340 in the second hole H2 of the second insulating film 350, which does not overlap with the first hole H1 of the first insulating film 340.

[0267] Electrode pattern 690 can be disposed on the first insulating film 340 to enhance the adhesion between the embankment 360 and the electrode pattern 690. Therefore, separation of the embankment 360 from the first insulating film 340 can be prevented.

[0268] As described above, in electrode pattern 690, second electrode pattern 792 may include a reflective material. If the reflective material is exposed, oxidation and denaturation may occur.

[0269] However, according to embodiments of this disclosure, in the electroluminescent display device 100, the lower surface of the second electrode pattern 792 can be covered by the first electrode pattern 791, and the upper surface of the second electrode pattern 792 can be covered by the third electrode pattern 793. Furthermore, since the sides of the second electrode pattern 792 are covered by the embankment 360, oxidation and deterioration of the second electrode pattern 792 can be prevented.

[0270] although Figure 7 The diagram illustrates the structure of electrode pattern 690 including first to third electrode patterns 791, 792, and 793, but embodiments of this disclosure are not limited thereto. For example, electrode pattern 690 may be formed from a single layer, and electrode pattern 690 formed from a single layer may include a transparent conductive material or a reflective material.

[0271] The embankment 360 can be configured to overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340.

[0272] Therefore, the auxiliary electrode 330 may include a region that overlaps with the embankment 360 but not with the first insulating film 340, the second insulating film 350, and the electrode pattern 690. In other words, in the region that overlaps with the embankment 360 but not with the first insulating film 340, the second insulating film 350, and the electrode pattern 690, the upper surface of the auxiliary electrode 330 may have a portion covered by the embankment 360. A portion of the upper surface of the auxiliary electrode 330 covered by the embankment 360 may correspond to... Figure 7 Region Y.

[0273] As described above, by means of a structure in which the first hole H1 of the first insulating film 340 overlaps with the embankment 360 in the region where the auxiliary electrode 330 is provided, an undercut structure can be achieved by means of the first insulating film 340 and the embankment 360 without the need for a separate barrier wall structure.

[0274] The light-emitting layer 495 of the LED can be disposed on the embankment 360.

[0275] The light-emitting layer 495 of the LED can be formed by linear deposition or coating. For example, the organic layer 420 can be formed by evaporation.

[0276] Therefore, the light-emitting layer 495 may not be disposed in the region Y covered by the embankment 360 on the upper surface of the auxiliary electrode 330. In other words, since the light-emitting layer 495 formed by linear deposition will not extend and deposit on the upper surface of the auxiliary electrode 330 covered by the embankment 360, the light-emitting layer 495 may not be disposed on the upper surface of the auxiliary electrode 330 that overlaps with the embankment 360 in the first hole H1 of the first insulating film 340.

[0277] The light-emitting layer 495 can be disposed on the upper surface of the auxiliary electrode 330, which does not overlap with the dam 360, the second insulating film 350, and the first insulating film 340. In other words, the light-emitting layer 495 can be disposed in the region corresponding to the third hole H3 of the dam 360.

[0278] The second electrode 497 of the light-emitting device LED can be disposed on the light-emitting layer 495.

[0279] The second electrode 497 can be formed by non-directional deposition or coating. For example, the second electrode 497 can be formed by sputtering. With its excellent step coverage, this method can easily form the second electrode 497 even in stepped or undercut structures.

[0280] Therefore, the second electrode 497 can be disposed on the light-emitting layer 495. The second electrode 497 can overlap with the entire light-emitting layer 495.

[0281] The second electrode 497 may also be disposed on a portion of the upper surface of the auxiliary electrode 330 in the area where the first hole H1 of the first insulating film 340 overlaps with the embankment 360. The second electrode 497 may cover at least one side of the light-emitting layer 495 disposed in the first hole H1 of the first insulating film 340.

[0282] In other words, the second electrode 497 contacts a portion of the upper surface of the auxiliary electrode 330 in the area where the first hole H1 of the first insulating film 340 overlaps with the embankment 360, so the second electrode 497 can be electrically connected to the auxiliary electrode 330.

[0283] In other words, by overlapping the first hole H1 of the first insulating film 340 with the embankment 360, the undercut structure can be achieved through the first insulating film 340 and the embankment 360 without the need for a separate barrier wall structure. Thus, a region on the auxiliary electrode 330 where the light-emitting layer 495 is not provided is formed, and the second electrode 497 and the auxiliary electrode 330 are in contact with each other in the region where the light-emitting layer 495 is not provided.

[0284] The following is for reference. Figure 8 and Figure 9 The structure of an electroluminescent display device according to another embodiment of the present disclosure is discussed.

[0285] Figure 8 It is shown Figure 3 A diagram of another embodiment of region X.

[0286] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0287] refer to Figure 8 The first insulating film 340, the second insulating film 350, the embankment 360, the light-emitting layer of the light-emitting device LED, the second electrode, and the electrode pattern 890 can be disposed on the auxiliary electrode 330 in a portion of the third transmission region TA3.

[0288] A first insulating film 340 may be disposed on a portion of the upper surface of the auxiliary electrode 330. The first insulating film 340 may include a first hole H1 exposing a portion of the upper surface of the auxiliary electrode 330.

[0289] A second insulating film 350 having a second hole H2 that overlaps with the first hole H1 of the first insulating film 340 can be disposed on the auxiliary electrode 330.

[0290] An electrode pattern 890 that overlaps with a portion of the upper surface of the first insulating film 340 and a portion of the upper surface of the second insulating film 350 can be disposed on the auxiliary electrode 330.

[0291] The electrode pattern 890 and the second insulating film 350 can be configured to expose a portion of the upper surface of the first insulating film 340 adjacent to the first hole H1.

[0292] The embankment 360, which overlaps with the first insulating film 340, the second insulating film 350 and the electrode pattern 890, may overlap with a portion of the first hole H1 of the first insulating film 340 and a portion of the second hole H2 of the second insulating film 350, and may be disposed on the auxiliary electrode 330.

[0293] The embankment 360 may include a third hole H3 exposing a portion of the upper surface of the auxiliary electrode 330, and may overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340 and the second hole H2 of the second insulating film 350. The light-emitting layer of the LED may not be disposed in the region where the upper surface of the auxiliary electrode 330 overlaps with the embankment 360 in the region having the first hole H1 of the first insulating film 340. Figure 8 In region Y).

[0294] Because the second electrode of the light-emitting device LED is located in the region where the first hole H1 of the first insulating film 340 is provided, the upper surface of the auxiliary electrode 330 overlaps with the embankment 360. Figure 8 The second electrode of the light-emitting device LED and the upper surface of the auxiliary electrode 330 are in a part of the region Y, so that they can contact each other.

[0295] The following is for reference. Figure 9 Let's discuss the structure in more detail.

[0296] Figure 9 It is along Figure 8 A sectional view taken from line IJ.

[0297] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0298] refer to Figure 9 The buffer layer 401 and the interlayer insulating film 403 can be disposed on the substrate 400, and the auxiliary electrode 330 can be disposed on the interlayer insulating film 403.

[0299] A first insulating film 340, including a first hole H1, may be disposed on a portion of the upper surface of the auxiliary electrode 330. The first hole H1 of the first insulating film 340 may overlap with a portion of the auxiliary electrode 330.

[0300] The electrode pattern 890 and the second insulating film 350 can be disposed on a portion of the upper surface of the first insulating film 340.

[0301] The electrode pattern 890 may include a first electrode pattern 991 disposed on the first insulating film 340, a second electrode pattern 992 disposed on the first electrode pattern 991, and a third electrode pattern 993 disposed on the second electrode pattern 992. (See reference) Figure 9 The electrode pattern 890 can contact the upper surface of the first insulating film 340, the side surface of the second insulating film 350, and the upper surface of the second insulating film 350. A first end of the electrode pattern 890 can be located on the upper surface of the first insulating film 340, and a second end of the electrode pattern 890 can be located on the upper surface of the second insulating film 350. The first end of the electrode pattern 890 can be located further inside the side surface of the first insulating film 340.

[0302] The electrode pattern 890 may not overlap with the first hole H1 of the first insulating film 340. In other words, the electrode pattern 890 may not overlap with the auxiliary electrode 330, which overlaps with the first hole H1 of the first insulating film 340.

[0303] Therefore, damage to the electrode pattern 890 due to static electricity between the electrode pattern 890 and the auxiliary electrode 330 can be prevented.

[0304] The second insulating film 350 may include a second hole H2 that overlaps with the first hole H1 of the first insulating film 340 and exposes a portion of the upper surface of the first insulating film 340.

[0305] As described above, the electrode pattern 890 can be disposed on the first insulating film 340 and can also be disposed in the second hole H2 of the second insulating film 350.

[0306] A portion of the electrode pattern 890 may be disposed on the second insulating film 350. For example, as... Figure 9 As shown, a portion of the electrode pattern 890 can be disposed on the upper surface of the second insulating film 350, another portion of the electrode pattern 890 can be disposed on the side surface of the second insulating film 350, and the remainder of the electrode pattern 890 can be disposed on the upper surface of the first insulating film 340.

[0307] The embankment 360 can be disposed on a first insulating film 340 on which a second insulating film 350 and an electrode pattern 890 are disposed.

[0308] The embankment 360 can overlap with the second insulating film 350 and can also overlap with the entire electrode pattern 890. (Reference) Figure 9 The embankment 360 can cover the two opposite ends of the electrode pattern 890 and the upper surface.

[0309] Electrode pattern 890 can be disposed on the first insulating film 340 to enhance the adhesion between the embankment 360 and the electrode pattern 690, and thus prevent the embankment 360 from separating from the first insulating film 340.

[0310] Furthermore, since the upper surface and sides of the electrode pattern 890 are covered by the embankment 360, oxidation and deterioration of the electrode pattern 890 can be prevented.

[0311] The embankment 360 can be configured to overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340.

[0312] The auxiliary electrode 330 may be a portion of the upper surface covered by the dam 360 in an area that overlaps with the dam 360 but not with the first insulating film 340, the second insulating film 350, and the electrode pattern 890. Thus, by having the first hole H1 of the first insulating film 340 overlap with the dam 360 in the area where the auxiliary electrode 330 is located, an undercut structure can be achieved using the dam 360 and the first insulating film 340 without a separate barrier wall structure.

[0313] The light-emitting layer 495 and the second electrode 497 can be disposed on the embankment 360.

[0314] The light-emitting layer 495 can also be disposed on the upper surface of the first insulating film 340, the second insulating film 350, and the auxiliary electrode 330 that does not overlap with the embankment 360. In other words, the light-emitting layer 495 can be disposed on the upper surface of the embankment 360 and in the third hole H3 of the embankment 360.

[0315] The second electrode 497 can be disposed on the light-emitting layer 495 and can also be disposed on a portion of the upper surface of the auxiliary electrode 330 in the area where the first hole H1 of the first insulating film 340 overlaps with the embankment 360. Therefore, the second electrode 497 can contact a portion of the upper surface of the auxiliary electrode 330 in the first hole H1 of the first insulating film 340.

[0316] The following is for reference. Figure 10 and Figure 11 The structure of an electroluminescent display device according to another embodiment of the present disclosure is discussed.

[0317] Figure 10 It is shown Figure 3 A diagram of another embodiment of region X.

[0318] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0319] refer to Figure 10 A first insulating film 340 may be provided, including a first hole H1 that exposes a portion of the upper surface of the auxiliary electrode 330.

[0320] A second insulating film 350, including a second hole H2 that overlaps with the first hole H1, can be disposed on the auxiliary electrode 330.

[0321] Electrode pattern 1090 can be disposed on auxiliary electrode 330. Electrode pattern 1090 can be spaced apart from second insulating film 350 in second hole H2.

[0322] The embankment 360, which overlaps with the first insulating film 340, the second insulating film 350 and the electrode pattern 1090, may overlap with a portion of the first hole H1 of the first insulating film 340 and a portion of the second hole H2 of the second insulating film 350, and may be disposed on the auxiliary electrode 330.

[0323] In the region where the embankment 360 overlaps with the second hole H2, the embankment 360 can also be disposed in the region between the auxiliary electrode 330 and the second insulating film 350.

[0324] The embankment 360 may include a third hole H3 that exposes a portion of the upper surface of the auxiliary electrode 330, and may overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340 and the second hole H2 of the second insulating film 350.

[0325] The light-emitting layer and the second electrode of the LED can be disposed in the third hole H3 of the dam 360.

[0326] Because the second electrode of the light-emitting device LED is located in the region where the first hole H1 of the first insulating film 340, which does not overlap with the third hole H3 of the embankment 360, overlaps with the upper surface of the auxiliary electrode 330 in the region where it overlaps with the embankment 360. Figure 8 The second electrode of the LED can contact the upper surface of the auxiliary electrode 330 on a portion of the region Y.

[0327] The following is for reference. Figure 11 The structure will be discussed in detail.

[0328] Figure 11 It is along Figure 10 A sectional view taken from line KL.

[0329] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0330] refer to Figure 11 A first insulating film 340, including a portion of the upper surface of the auxiliary electrode 330 that exposes a first hole H1, may be disposed on the auxiliary electrode 330.

[0331] Electrode pattern 1090 and second insulating film 350 may be disposed on a portion of the upper surface of first insulating film 340. (Reference) Figure 11 The lower surface of the electrode pattern 1090 can contact the upper surface of the first insulating film 340. The two opposite ends of the electrode pattern 1090 can be located on the upper surface of the first insulating film 340. The first end of the electrode pattern 1090 can be formed to be spaced apart from the side of the second insulating film 350, and the second end of the electrode pattern 1090 does not protrude beyond the side of the first insulating film 340.

[0332] The electrode pattern 1090 may include a first electrode pattern 1191, a second electrode pattern 1192, and a third electrode pattern 1193.

[0333] The second insulating film 350 may include a second hole H2 that overlaps with the first hole H1 of the first insulating film 340 and exposes a portion of the upper surface of the first insulating film 340.

[0334] In the second hole H2 of the second insulating film 350, the electrode pattern 1090 and the second insulating film 350 can be spaced apart from each other.

[0335] The electrode pattern 1090 may not overlap with the first hole H1 of the first insulating film 340, and the electrode pattern 1090 may not overlap with the auxiliary electrode 330 that overlaps with the first hole H1.

[0336] The embankment 360 can be disposed on the first insulating film 340, the electrode pattern 1090, and the second insulating film 350.

[0337] The embankment 360 can overlap with the second insulating film 350 and can also overlap with the entire electrode pattern 1090. (Reference) Figure 11 The embankment 360 can cover both opposite ends of the electrode pattern 1090 and its upper surface. The embankment 360 can be disposed in the region spaced apart from one end of the electrode pattern 1090 and the second insulating film 350. Therefore, the embankment 360 can cover one end of the electrode pattern 1090 and the side of the second insulating film 350.

[0338] The embankment 360 can also be disposed in the area where the electrode pattern 1090 and the second insulating film 350 are spaced apart from each other in the second hole H2 of the second insulating film 350. The embankment 360 disposed between the electrode pattern 1090 and the second insulating film 350 can contact the upper surface of the first insulating film 340.

[0339] Meanwhile, since the first to third electrode patterns 1191, 1192 and 1193 of the electrode pattern 1090 include transparent conductive materials or reflective materials, the adhesive force between the electrode pattern 1090 and the first insulating film 340 can be greater than the adhesive force between the first insulating film 340 and the embankment 360.

[0340] Furthermore, since the first to third electrode patterns 1191, 1192 and 1193 of the electrode pattern 1090 include transparent conductive materials or reflective materials, the adhesive force between the electrode pattern 1090 and the embankment 360 can be greater than the adhesive force between the first insulating film 340 and the embankment 360.

[0341] Therefore, since the electrode pattern 1090 is disposed between the embankment 360 and the first insulating film 340, even if the embankment 360 and the first insulating film 340 are partially in contact with each other, the embankment 360, the electrode pattern 1090 and the first insulating film 340 can be prevented from separating from each other.

[0342] The embankment 360 can be configured to overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340.

[0343] The light-emitting layer 495 and the second electrode 497 can be disposed on the embankment 360.

[0344] Specifically, the light-emitting layer 495 can be disposed on the embankment 360 and can also be disposed on the upper surface of the first insulating film 340, the second insulating film 350, and the auxiliary electrode 330 that does not overlap with the embankment 360. In other words, the light-emitting layer 495 can be disposed on the upper surface of the auxiliary electrode 330 that overlaps with the third hole H3 of the embankment 360.

[0345] The second electrode 497 can be disposed on the light-emitting layer 495 and also on a portion of the upper surface of the auxiliary electrode 330 in the area where the first hole H1 of the first insulating film 340 overlaps with the embankment 360. Therefore, the second electrode 497 can contact a portion of the upper surface of the auxiliary electrode 330 in the first hole H1 of the first insulating film 340 and thus can be electrically connected to the auxiliary electrode 330.

[0346] In other words, the second electrode 497 can be disposed on the embankment 360, or on the auxiliary electrode 330 which overlaps with the third hole H3 of the embankment 360, or on the portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340 but not with the third hole H3.

[0347] Since the second electrode 497 is electrically connected to the auxiliary electrode 330 through this structure, the degradation of the brightness characteristics of the electroluminescent display device due to voltage drop caused by the second electrode 497 can be prevented.

[0348] although Figures 3 to 11 The structure of the auxiliary electrode 330 disposed in a portion of the transmission region is shown, but the embodiments disclosed herein are not limited thereto.

[0349] For example, the auxiliary electrode 330 and the auxiliary line 331 integrated with the auxiliary electrode 330 can be disposed in the light-emitting region or in the non-light-emitting region adjacent to the transmission region.

[0350] This is for reference below. Figure 12 and Figure 13 Describe it.

[0351] Figure 12 This is a diagram showing a portion of the active region of an electroluminescent display device according to other embodiments of the present disclosure.

[0352] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0353] refer to Figure 12According to embodiments of the present disclosure, the active region AA of the electroluminescent display device 100 may include a plurality of light-emitting regions EA1, EA2, EA3 and EA4 and a plurality of transmissive regions TA1, TA2, TA3 and TA4.

[0354] The active region AA may include a non-emitting region NEA disposed between the emitting region and the transmitting region. The active region AA may also include a non-emitting region NEA disposed between different emitting regions. The active region AA may also include a non-emitting region NEA disposed between different transmitting regions.

[0355] At least one contact portion 1230 that contacts the auxiliary electrode with the second electrode of the light-emitting device may be disposed in the non-light-emitting region NEA of the active region AA.

[0356] For example, the contact portion 1230 may be disposed in the non-light-emitting region NEA between a light-emitting region EA3 (third light-emitting region) and a transmission region TA3 (third transmission region), but the embodiments disclosed herein are not limited thereto.

[0357] The structure of the contact portion 1230, which is disposed in the non-light-emitting area NEA, is described in detail below.

[0358] Figure 13 It is along Figure 12 A cross-sectional view taken from lines MN and OP.

[0359] Figure 12 The line MN is the line that cuts through a portion of the third luminescent region EA3 and the non-luminescent region NEA. Figure 12 The line OP is a line that cuts a portion of the third transmission region TA3.

[0360] The configurations and effects that are substantially the same as those described above will not be repeated below. In the following description, elements or components that are the same as those described in the above embodiments may be indicated by the same reference numerals.

[0361] refer to Figure 13 The active region AA may include the third luminescent region EA3, the non-luminescent region NEA, and the third transmissive region TA3.

[0362] In the active region AA, the light blocking layer 410, the third voltage line 420, the active layer 426, the gate electrode 440, the source electrode 450, the drain electrode 460, the fourth data line DL4, and the light-emitting device LED can be disposed on the substrate 400.

[0363] The second voltage line 312, which is disposed on the same layer as the source electrode 450, the drain electrode 460 and the fourth data line DL4, can be disposed in the non-light-emitting region NEA of the active region AA.

[0364] The second voltage line 312 can be integrally formed with the auxiliary electrode 1130. The auxiliary electrode 1130 can be referred to as an auxiliary line, and the auxiliary electrode 1130 and the auxiliary line can have substantially the same configuration. Therefore, for ease of description, the auxiliary line will be referred to as the auxiliary electrode 1130 in the following description.

[0365] The auxiliary electrode 1330 can also be placed in the non-light-emitting region NEA of the active region AA.

[0366] The auxiliary electrode 1330 may include a first auxiliary electrode 1331 disposed on the interlayer insulating film 403, a second auxiliary electrode 1332 disposed on the first auxiliary electrode 1331, and a third auxiliary electrode 1333 disposed on the second auxiliary electrode 1332.

[0367] The first insulating film 340 can be disposed on the source electrode 450, the drain electrode 460, the fourth data line DL4, the second voltage line 312, and the auxiliary electrode 1330.

[0368] The first insulating film 340 may include a first hole H1 on a portion of the upper surface of the auxiliary electrode 1330 in the non-light-emitting region NEA.

[0369] Electrode pattern 1390 and second insulating film 350 may be disposed on a portion of the upper surface of first insulating film 340.

[0370] The electrode pattern 1390 may include a first electrode pattern 1391 disposed on the first insulating film 340, a second electrode pattern 1392 disposed on the first electrode pattern 1391, and a third electrode pattern 1393 disposed on the second electrode pattern 1392.

[0371] The electrode pattern 1390 can be formed using the same process as the first electrode 390 of the light-emitting device LED.

[0372] The first electrode pattern 1391 of electrode pattern 1390 and the lower electrode 491 of the first electrode 390 may contain the same material. The second electrode pattern 1392 of electrode pattern 1390 and the upper electrode 492 of the first electrode 390 may contain the same material. The third electrode pattern 1393 of electrode pattern 1390 and the cap electrode 493 of the first electrode 390 may contain the same material.

[0373] The angle between the side of each of the electrode pattern 1390 and the first electrode 390 and the surface of the first insulating film 340 can be 90 degrees, but the embodiments of this disclosure are not limited to this, and depending on the processing conditions, the angle between the side of each of the electrode pattern 1390 and the first electrode 390 and the surface of the first insulating film 340 can be less than 90 degrees.

[0374] The electrode pattern 1390 may not overlap with the first hole H1 of the first insulating film 340, and the electrode pattern 1390 may also not overlap with the auxiliary electrode 1330 that overlaps with the first hole H1. Therefore, damage to the electrode pattern 1390 due to static electricity can be prevented.

[0375] The second insulating film 350 disposed on the first insulating film 340 may include a second hole H2 that overlaps with the first hole H1 of the first insulating film 340 and exposes a portion of the upper surface of the first insulating film 340. In other words, the second insulating film 350 can expose a portion of the upper surface of the first insulating film 340 through the second hole H2.

[0376] The insulating pattern 1390 may be disposed on a portion of the upper surface of the first insulating film 340 exposed by the second insulating film 350.

[0377] although Figure 13 The diagram shows the structure of the insulating pattern 1390 spaced apart from the second insulating film 350 in the second hole H2, but the embodiments of this disclosure are not limited thereto. The above-described... Figures 6 to 9 The arrangement of the second insulating film 350 and the electrode patterns 690 and 890.

[0378] The embankment 360 can be disposed on the second insulating film 350, the electrode pattern 1390, and the first insulating film 340. The embankment 360 can also be disposed on a portion of the upper surface of the first electrode 390 of the light-emitting device LED.

[0379] The embankment 360 can overlap with the entire electrode pattern 1390. Specifically, the embankment 360 can cover the entire upper surface and sides of the electrode pattern 1390. Because the electrode pattern 1390 is protected by the embankment 360, oxidation and denaturation will not occur.

[0380] The embankment 360 can be configured to overlap with a portion of the upper surface of the auxiliary electrode 330 that overlaps with the first hole H1 of the first insulating film 340.

[0381] Therefore, the auxiliary electrode 330 may include a region that overlaps with the embankment 360 but not with the first insulating film 340, the second insulating film 350, and the electrode pattern 690. Thus, by having the first hole H1 of the first insulating film 340 overlap with the embankment 360 in the region where the auxiliary electrode 330 is located, an undercut structure can be achieved using the embankment 360 and the first insulating film 340 without the need for a separate barrier wall structure.

[0382] The light-emitting layer 495 of the LED can be disposed on the embankment 360.

[0383] The dam 360 may include a third hole H3 that overlaps with a portion of the first hole H1 of the first insulating film 340 and a portion of the second hole H2 of the second insulating film 350. The light-emitting layer 495 may also be disposed on the upper surface of the auxiliary electrode 330 that overlaps with the third hole H3 of the dam 360.

[0384] The light-emitting layer 495 may not be disposed in the area where the first hole H1 of the first insulating film 340 overlaps with the embankment 360.

[0385] The second electrode 497 of the light-emitting device LED can be disposed on the light-emitting layer 495.

[0386] The second electrode 497 can overlap with the entire light-emitting layer 495.

[0387] The second electrode 497 can also be disposed on a portion of the upper surface of the auxiliary electrode 330 in the region where the first hole H1 of the first insulating film 340 overlaps with the embankment 360. Therefore, the second electrode 497 and the auxiliary electrode 330 can be electrically connected.

[0388] In other words, since a portion of the upper surface of the auxiliary electrode 330 is exposed through the first hole H1 of the first insulating film 340, and the second hole H2 of the second insulating film 350 disposed on the first insulating film 340 overlaps with the first hole H1 with a larger area than the first hole H1, and the embankment 360 overlapping with a portion of the first hole H1 is disposed on the second insulating film 350, the light-emitting layer 495 of the light-emitting device LED does not need to be disposed on a portion of the upper surface of the auxiliary electrode 330. Since the second electrode 497 of the light-emitting device LED contacts the portion of the upper surface of the auxiliary electrode 330 where the light-emitting layer 495 is not disposed, the degradation of the brightness characteristics of the electroluminescent display device due to the voltage drop caused by the second electrode 497 can be prevented.

[0389] In addition, Figure 12 and Figure 13 In the electroluminescent display device 100 shown, which includes multiple transmission regions, the area where the auxiliary electrode 330 and the second electrode 497 of the light-emitting device LED contact is located in the non-light-emitting region NEA, rather than in the transmission region, so that the transmittance of the transmission region can be improved.

[0390] although Figure 12 and Figure 13 The diagram shows a structure in which the area where the auxiliary electrode 330 and the second electrode 497 of the light-emitting device LED are in contact is located in the non-light-emitting area NEA, but the embodiments of this disclosure are not limited thereto.

[0391] If the electroluminescent display device 100 is a top-emitting electroluminescent display device, the area where the auxiliary electrode 330 contacts the second electrode 497 of the light-emitting device LED can overlap with the light-emitting area.

[0392] The above description has been provided to enable those skilled in the art to make and use the technical concepts of this disclosure, and the above description is provided in the context of a particular application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this disclosure. The above specification and drawings provide examples of the technical concepts of this disclosure for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical concepts of this disclosure. Therefore, the scope of embodiments of this disclosure is not limited to the embodiments shown, but should be given the widest scope consistent with the claims. The scope of protection of this disclosure should be interpreted based on the appended claims, and all technical concepts within their equivalent scope should be interpreted as being included within the scope of this disclosure.

Claims

1. An electroluminescent display device, comprising: At least one auxiliary electrode, said at least one auxiliary electrode being disposed on a substrate; A first insulating film is disposed on the auxiliary electrode and includes a first hole exposing a portion of the upper surface of the auxiliary electrode; A second insulating film is disposed on the first insulating film and includes a second hole exposing a portion of the upper surface of the first insulating film; An electrode pattern is disposed on a portion of the upper surface of the first insulating film and overlaps with the second hole of the second insulating film; The first electrode of the light-emitting device is disposed on the second insulating film; A dam portion is disposed on the upper surface of the second insulating film and on the upper surface of the first insulating film exposed through the second hole, and the dam portion defines a third hole; The light-emitting layer of the light-emitting device is disposed on the first electrode and the embankment; as well as The second electrode of the light-emitting device is disposed on the light-emitting layer and electrically connected to the upper surface of the auxiliary electrode exposed through the first hole in the first insulating film. The embankment extends above the first hole and overlaps with a portion of the first hole. The electrode pattern is configured to enhance the adhesion between the first insulating film and the embankment.

2. The electroluminescent display device according to claim 1, wherein, The area of ​​the second hole in the second insulating film is larger than the area of ​​the first hole in the first insulating film.

3. The electroluminescent display device according to claim 1, wherein, The embankment is disposed on a portion of the second insulating film, a portion of the first electrode, a portion of the first hole in the first insulating film, and the entire electrode pattern.

4. The electroluminescent display device according to claim 1, wherein, The light-emitting layer is disposed on the auxiliary electrode that overlaps with the third hole of the embankment.

5. The electroluminescent display device according to claim 4, wherein, The second electrode is disposed on the light-emitting layer disposed on the auxiliary electrode exposed through the third hole of the embankment, and The second electrode is electrically connected to the upper surface of the auxiliary electrode, which is exposed through the first hole of the first insulating film but does not overlap with the third hole of the embankment.

6. The electroluminescent display device according to claim 1, wherein, The electrode pattern does not overlap with the first hole in the first insulating film.

7. The electroluminescent display device according to claim 1, wherein, A portion of the electrode pattern is in contact with the second insulating film.

8. The electroluminescent display device according to claim 7, wherein, In the region between the first hole in the first insulating film and the electrode pattern, a portion of the embankment is in contact with a portion of the upper surface of the first insulating film.

9. The electroluminescent display device according to claim 1, wherein, The electrode pattern is spaced apart from the second insulating film.

10. The electroluminescent display device according to claim 9, wherein, In the region between the electrode pattern and the second insulating film, a portion of the embankment is in contact with the upper surface of the first insulating film.

11. The electroluminescent display device according to claim 1, wherein, A portion of the embankment overlaps with the portion of the auxiliary electrode that overlaps with the first hole in the first insulating film, and Wherein, the light-emitting layer and the second electrode are not disposed in the portion of the area where the embankment and the auxiliary electrode overlap.

12. The electroluminescent display device according to claim 1, wherein, The electrode pattern includes a first electrode pattern, a second electrode pattern disposed on the first electrode pattern, and a third electrode pattern disposed on the second electrode pattern. Wherein, the first electrode pattern and the third electrode pattern comprise a transparent conductive material, and The second electrode pattern includes a reflective material.

13. The electroluminescent display device according to claim 12, wherein, The entire side of the second electrode pattern is surrounded by the embankment.

14. The electroluminescent display device according to claim 1, wherein, The active region of the electroluminescent display device includes multiple light-emitting regions, non-light-emitting regions surrounding the multiple light-emitting regions, and multiple transmissive regions adjacent to the light-emitting regions and the non-light-emitting regions. The at least one auxiliary electrode is disposed in at least one of the transmission region or the non-light-emitting region.

15. The electroluminescent display device according to claim 1, further comprising a thin-film transistor disposed on the substrate and including a gate electrode, an active layer, a source electrode, and a drain electrode. in, The auxiliary electrode is disposed on the same layer as the source electrode and the drain electrode.

16. The electroluminescent display device according to claim 15, further comprising a plurality of voltage lines disposed on the substrate and disposed on the same layer as the source electrode and the drain electrode. in, The auxiliary electrode is integrally formed with a line branching off from at least one voltage line.

17. A display panel, comprising: At least one auxiliary electrode, said at least one auxiliary electrode being disposed on a substrate; A first insulating film is disposed on the auxiliary electrode and includes a first hole exposing a portion of the upper surface of the auxiliary electrode; A second insulating film is disposed on the first insulating film and includes a second hole exposing a portion of the upper surface of the first insulating film; An electrode pattern is disposed on at least one of the first insulating film and the second insulating film; The first electrode of the light-emitting device is disposed on the second insulating film; A dam portion is disposed on the upper surface of the second insulating film and on the upper surface of the first insulating film exposed through the second hole; The light-emitting layer of the light-emitting device is disposed on the first electrode and the embankment and on a portion of the upper surface of the auxiliary electrode; as well as The second electrode of the light-emitting device is disposed on the light-emitting layer and electrically connected to the upper surface of the auxiliary electrode that overlaps with the first hole of the first insulating film. The electrode pattern is configured to enhance the adhesion between the first insulating film and the embankment.

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