Organic light emitting display panel and organic light emitting display device including same

Abstract

Embodiments of the present disclosure relate to an organic light emitting display panel and an organic light emitting display device including the same, and more particularly, to a display panel including: a substrate including an active area and a non-active area; a transistor disposed on the substrate; an insulating film disposed on the transistor, the insulating film including at least one recess; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulating film, in which the sub-pixel includes at least two light emitting portions and at least one non-light emitting portion, and the at least one non-light emitting portion is disposed between the at least two light emitting portions, and in which the at least one non-light emitting portion is disposed between the at least two light emitting portions. A surface of the organic light emitting diode includes at least one protrusion in at least one light emitting portion of the at least two light emitting portions.

Description

[0001] This application is a divisional application of a Chinese patent application filed on September 11, 2020, with the application number 202010954126.8 and the invention title "Organic Light-Emitting Display Panel and Organic Light-Emitting Display Device Including the Same". The priority date of the parent application is September 20, 2019.

[0002] Cross-reference to related applications

[0003] This application claims the priority of Korean Patent Application No. 10-2019-0115803, filed on September 20, 2019, which is incorporated herein by reference and for all purposes as if fully set forth herein. Technical field

[0004] Various embodiments of the present disclosure relate to an organic light-emitting display panel and an organic light-emitting display device including the organic light-emitting display panel. Background art

[0005] Regarding display devices or lighting devices, the development of a smart society has led to an increased demand for various types of display panels. Among display panels, organic light-emitting display panels can be thin and lightweight and do not require a separate light source, and thus have gained popularity.

[0006] The organic light-emitting display panel includes an organic layer for emitting light. A part of the light emitted from the organic layer can be trapped inside the organic light-emitting display device. Therefore, the light extraction efficiency of the organic light-emitting display panel may be reduced, and the lighting efficiency may be reduced. Summary of the invention

[0007] Embodiments of the present disclosure aim to provide an organic light-emitting display panel and an organic light-emitting display device having a structure with improved light extraction efficiency.

[0008] Embodiments of the present disclosure also aim to provide an organic light-emitting display panel and an organic light-emitting display device having a structure capable of preventing color mixing between two adjacent sub-pixels.

[0009] Embodiments of the present disclosure also aim to provide an organic light-emitting display panel and an organic light-emitting display device having an increased emission area in an active region.

[0010] According to an embodiment of the present disclosure, an organic light emitting display panel can be provided. The organic light emitting display panel includes an active region having a plurality of sub-pixels. The organic light emitting display panel includes: a substrate; an insulating film disposed on the substrate, and in at least one sub-pixel of the active region, the insulating film includes at least one recess, and the at least one recess includes a flat portion and an inclined portion surrounding the flat portion; a first electrode, in at least one sub-pixel region, the first electrode is disposed on a part of the recess and a surrounding portion disposed around the recess, and the first electrode includes at least one protrusion on its surface; a bank, including: a first portion disposed on the first electrode in a region corresponding to a part of the recess and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; an organic layer overlapping the recess and disposed on the first electrode, the organic layer having a surface shape corresponding to the shape of the top surface of the first electrode having protrusions on the first electrode; and a second electrode disposed on the organic layer and the bank, the second electrode having a surface shape corresponding to the surface shape of the organic layer in a region overlapping the organic layer.

[0011] According to an embodiment of the present disclosure, an organic light emitting display device can be provided. The organic light emitting display device includes an active region having a plurality of sub-pixels. The organic light emitting display device includes: an insulating film disposed on a substrate, and in at least one sub-pixel region, the insulating film includes at least one recess, and the at least one recess includes a flat portion and an inclined portion surrounding the flat portion; a first electrode, in at least one sub-pixel region, the first electrode is disposed on a part of the recess and a surrounding portion disposed around the recess, and the first electrode includes at least one protrusion on its surface; a bank, the bank includes a first portion positioned on a part of the recess and a second portion positioned on the surrounding portion; an organic layer overlapping the recess and disposed on the first electrode, the organic layer having a surface shape corresponding to the shape of the top surface of the first electrode having protrusions on the first electrode; and a second electrode, the second electrode having a surface shape corresponding to the surface shape of the organic layer in a region overlapping the organic layer, wherein, in the region where the flat portion is provided, the region where the first electrode does not overlap with the bank is a first light emitting portion, wherein, in the region where the flat portion is provided, the region where the bank overlaps with the first electrode is a first non-light emitting portion, and wherein, the region corresponding to the inclined portion is a second light emitting portion.

[0012] According to an embodiment of the present disclosure, an organic light emitting display panel can be provided. The organic light emitting display panel includes an active region having a plurality of sub-pixels. The organic light emitting display panel includes: a substrate; an insulating film disposed on the substrate, and in at least one sub-pixel of the active region, the insulating film includes at least one recess, and the at least one recess includes a flat portion and an inclined portion surrounding the flat portion; a first electrode, in the at least one sub-pixel region, the first electrode is disposed on a part of the recess and on a surrounding portion disposed around the recess, and the first electrode includes at least one protrusion on its surface; a bank, the bank includes: a first portion disposed on the first electrode in a region corresponding to a part of the recess; and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; and an organic layer overlapping the recess and disposed on the first electrode, wherein the height of the inclined portion is greater than or equal to the height of the second portion of the bank.

[0013] According to an embodiment of the present disclosure, a display panel can be provided, including: a substrate including an active region and a non-active region; a transistor disposed on the substrate; an insulating film disposed on the transistor, the insulating film including at least one recess; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulating film, wherein the sub-pixel includes at least two light emitting portions and at least one non-light emitting portion, and the at least one non-light emitting portion is disposed between the at least two light emitting portions, and wherein the surface of the organic light emitting diode includes at least one protrusion located in at least one of the at least two light emitting portions.

[0014] According to an embodiment of the present disclosure, a display panel can be provided, including: a substrate including an active region and a non-active region; a transistor disposed on the substrate; an insulating film disposed on the transistor, the insulating film including at least one recess; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulating film, wherein the sub-pixel includes at least two light emitting portions and at least one non-light emitting portion, and the at least one non-light emitting portion is disposed between the at least two light emitting portions, and wherein the surface of the organic light emitting diode includes at least one protrusion located in at least one of the at least one non-light emitting portion.

[0015] According to an embodiment of the present disclosure, a display panel may be provided, including: a substrate including an active region and a non-active region; a transistor disposed on the substrate; an insulating film disposed on the transistor, the insulating film including at least an inclined portion and a flat portion; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light-emitting diode disposed on the insulating film, wherein the organic light-emitting diode includes a first electrode, an organic layer, and a second electrode disposed on the insulating film, and wherein a surface of the organic light-emitting diode includes at least one protrusion located on a top surface of the first electrode in a region corresponding to the inclined portion.

[0016] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device having a structure with improved light extraction efficiency may be provided.

[0017] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device having a structure capable of preventing color mixing between two adjacent sub-pixels may be provided.

[0018] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device having an increased emission region in an active region may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features, and advantages of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a diagram schematically showing a system configuration of an organic light-emitting display device according to an embodiment of the present disclosure;

[0021] Figure 2 is a diagram showing an example of a 3T (transistor) 1C (capacitor) structure, in which one sub-pixel further includes a second transistor electrically connected between a second node of a driving transistor and a reference voltage line;

[0022] Figure 3 is a plan view showing a light-emitting portion and a non-light-emitting portion included in an active region of an organic light-emitting display panel according to an embodiment of the present disclosure;

[0023] Figure 4 is showing along Figure 3 a cross-sectional view of a region taken along line A-B and a part of a pad region;

[0024] Figure 5 is a diagram showing an arrangement of a plurality of protrusions on a top surface of a first electrode;

[0025] Figure 6 is an enlarged view of region X showing Figure 4 ;

[0026] Figure 7 is an enlarged view of region Y showing Figure 4 ;

[0027] Figure 8 is an enlarged view of region Z showing Figure 4 ;

[0028] Figure 9 is a graph showing the light extraction efficiency and the contrast (automatically adjusted by the light radiated from the outside) depending on the viewing angle of an organic light emitting display device according to a comparative example and an organic light emitting display device according to an embodiment of the present disclosure;

[0029] Figure 10 is a cross-sectional view of an organic light emitting display device according to another embodiment of the present disclosure;

[0030] Figure 11 is a cross-sectional view of an organic light emitting display device according to still another embodiment of the present disclosure; and

[0031] Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 is a view showing protrusions on the top surface of the first electrode in one pixel. DETAILED DESCRIPTION

[0032] In the following description of examples or embodiments of the present disclosure, reference will be made to the accompanying drawings, in which specific examples or embodiments that can be implemented are illustrated by way of illustration, and in the drawings, the same reference numerals and symbols may be used to represent the same or similar components, even when these components are shown in different drawings. Further, in the following description of examples or embodiments of the present disclosure, when it is determined that the description may make the subject matter in some embodiments of the present disclosure unclear, detailed descriptions of well-known functions and components incorporated herein will be omitted. Terms such as "including", "having", "containing", "constituting", "consisting of", and "formed of" used herein are generally intended to allow the addition of other components, unless these terms are used together with the term "only". As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise.

[0033] In this document, terms such as "first", "second", "A", "B", "(A)", or "(B)" may be used to describe elements of the present disclosure. Each of these terms is not used to define the nature, order, sequence, or number of elements, etc., but is only used to distinguish the corresponding element from other elements.

[0034] When it is mentioned that a first element is "connected to or coupled to" a second element, "in contact with or overlapping" the second element, etc., it should be interpreted that not only can the first element be "directly connected to or coupled to" the second element or "in direct contact with or overlapping" the second element, but also a third element can be "inserted" between the first element and the second element, or the first element and the second element can be "connected or coupled" to each other, "in contact with or overlapping" each other, etc. via a fourth element. Here, the second element may be included in at least one of two or more elements that are "connected or coupled", "in contact with or overlapping", etc. with each other.

[0035] When relative time terms such as "after", "subsequently", "then", "before", etc. are used to describe the process or operation of an element or configuration, or the flow or steps in an operation, process, manufacturing method, these terms can be used to describe a non - continuous or non - sequential process or operation, unless used together with the terms "directly" or "immediately".

[0036] In addition, when any size, relative dimension, etc. is mentioned, it should be considered that the numerical value or corresponding information of an element or feature (e.g., level, range, etc.) includes a tolerance or error range that may be caused by various factors (e.g., process factors, internal influences, external influences, noise, etc.), even if the relevant description is not specifically stated. Furthermore, the term "may" fully encompasses all meanings of the term "might".

[0037] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0038] Figure 1 is a diagram schematically showing the system configuration of an organic light - emitting display device according to an embodiment of the present disclosure.

[0039] According to an embodiment of the present disclosure, a display device may include a panel PNL for displaying an image or outputting light and a driving circuit for driving the panel PNL.

[0040] The panel PNL may include a plurality of data lines DL, a plurality of gate lines GL, and a plurality of sub - pixels SP defined by the plurality of data lines DL and the plurality of gate lines GL and arranged in a matrix type.

[0041] In the panel PNL, a plurality of data lines DL and a plurality of gate lines GL can be arranged to cross each other. For example, the plurality of gate lines GL can be arranged in rows or columns, and the plurality of data lines DL can be arranged in columns or rows. For the sake of description, hereinafter, it is assumed that the plurality of gate lines GL are arranged in rows, and the plurality of data lines DL are arranged in columns.

[0042] According to, for example, the sub-pixel structure, the panel PNL can have other types of signal lines as well as the plurality of data lines DL and the plurality of gate lines GL. The panel PNL can also have drive voltage lines, reference voltage lines, or common voltage lines.

[0043] The types of signal lines provided on the panel PNL can vary according to, for example, the sub-pixel structure or the panel type. In the present disclosure, the concept of signal lines can include electrodes for applying signals.

[0044] The panel PNL can include an active area A / A for displaying pictures or images and a non-active area N / A around the active area A / A where no image is displayed. The non-active area N / A is also referred to as a border area.

[0045] The active area A / A includes a plurality of sub-pixels SP for displaying images.

[0046] The non-active area N / A has a pad area for electrically connecting to the data driver DDR, and can have a plurality of data link lines for connecting the pad area to the plurality of data lines DL. The plurality of data link lines can be extensions of the plurality of data lines DL to the non-active area N / A, or can be separate patterns electrically connected to the plurality of data lines DL.

[0047] The non-active area N / A can also include lines related to gate driving to transmit the voltage (signal) required for gate driving to the gate driver GDR through pads electrically connected to the data driver DDR. For example, the lines related to gate driving can include clock lines for transmitting clock signals, gate voltage lines for transmitting gate voltages VGH and VGL, and gate drive control signal lines for transmitting various control signals required to generate scan signals. Different from the gate lines GL provided in the active area A / A, the lines related to gate driving are provided in the non-active area N / A.

[0048] The driving circuit can include a data driver DDR for driving a plurality of display devices, a gate driver GDR for driving a plurality of 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 the plurality of data lines DL by outputting data voltages to the plurality of data lines DL.

[0050] The gate driver GDR can drive a plurality of gate lines GL by outputting scan signals to the plurality of gate lines GL.

[0051] The controller CTR can control the driving operations of the data driver DDR and the gate driver GDR by supplying various control signals DCS and GCS required for the driving operations of the data driver DDR and the gate driver GDR. In addition, the controller CTR can supply image data DATA to the data driver DDR.

[0052] The controller CTR starts scanning according to the timing implemented in each frame, converts the input image data input from the outside into image data DATA in a data signal format suitable for use in the data driver DDR, outputs the image data DATA, and controls the data driving at an appropriate time suitable for scanning.

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

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

[0055] To control the data driver DDR, the controller CTR outputs various data control signals DCS, including, for example, a source start pulse SSP, a source sampling clock SSC, and a source output enable signal (source output enable, SOE).

[0056] The controller CTR can be a timing controller used in typical display technologies, or a control device that can perform other control functions as well as the functions of a timing controller.

[0057] The controller CTR can be implemented as a component discrete from the data driver DDR, or the controller CTR and the data driver DDR together can be implemented as an integrated circuit.

[0058] The data driver DDR receives image data DATA from the controller CTR and supplies data voltages to a plurality of data lines DL, thereby driving the plurality of data lines DL. Here, the data driver DDR is also referred to as a source driver.

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

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

[0061] The gate driver GDR sequentially supplies a scan signal of an on voltage or an off voltage to the plurality of gate lines GL under the control of the controller CTR.

[0062] When a specific gate line is opened by the gate driver GDR, the data driver DDR converts the image data DATA received from the controller CTR into an analog data voltage and supplies the analog data voltage to the plurality of data lines DL.

[0063] The data driver DDR may be located on only one side (e.g., the top side or the bottom side) of the panel PNL, and in some cases, depending on, for example, the driving scheme or the panel design, the data driver DDR may be located on each of the two opposite sides (e.g., both the top side and the bottom side) of the panel PNL.

[0064] The gate driver GDR may be located on only one side (e.g., the left side or the right side) of the panel PNL, and in some cases, depending on, for example, the driving scheme or the panel design, the gate driver GDR may be located on each of the two opposite sides (e.g., both the left side and the right side) of the panel PNL.

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

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

[0067] Each source driver integrated circuit (SDIC) may be connected to a bonding pad of the panel PNL in a tape automated bonding (TAB) type or a chip-on-glass (COG) type, or may be directly disposed on the panel PNL. In some cases, each source driver integrated circuit (SDIC) may be integrated and disposed on the panel PNL. Each source driver integrated circuit (SDIC) may be implemented in a chip-on-film (COF) type. In this case, each source driver integrated circuit (SDIC) may be mounted on a circuit film and electrically connected to the data lines DL of the panel PNL through the circuit film.

[0068] The gate driver GDR may include a plurality of gate driving circuits GDC. The plurality of gate driving circuits may respectively correspond to the plurality of gate lines GL.

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

[0070] Each gate driving circuit GDC may be connected to a bonding pad of the panel PNL in a tape automated bonding (TAB) type or a chip on glass (COG) type. Each gate driving circuit GDC may be implemented in a chip on film (COF) scheme. In this case, each gate driving circuit GDC may be mounted on a circuit film and electrically connected to a gate line GL of the panel PNL through the circuit film. Each gate driving circuit GDC may be implemented in an in-panel gate (GIP) type and embedded in the panel PNL. In other words, each gate driving circuit GDC may be directly formed on the panel PNL.

[0071] Figure 2 FIG. is a diagram showing an exemplary 3T (transistor) 1C (capacitor) structure, in which one sub-pixel further includes a second transistor electrically connected between a second node of a driving transistor and a reference voltage line.

[0072] Referring to Figure 2 , the second transistor T2 may be electrically connected between a second node N2 of the driving transistor DRT and a reference voltage line RVL, and receive a second scan signal SCAN2 through a gate node to control its conduction / turn-off.

[0073] An anode (also referred to as a pixel electrode) of the organic light emitting diode OLED may be electrically connected to a second node N2 of the driving transistor DRT. A cathode (also referred to as a common electrode) of the organic light emitting diode OLED may have a base voltage EVSS applied thereto.

[0074] A drain node or a source node of the second transistor T2 may be electrically connected to the reference voltage line RVL, and a source node or a drain node of the second transistor T2 may be electrically connected to a second node N2 of the driving transistor DRT.

[0075] The second transistor T2 may be turned on, for example, during a display driving period, and may be turned on during a sensing driving period for sensing a characteristic value of the driving transistor DRT or a characteristic value of the organic light emitting diode (OLED).

[0076] Synchronized with related driving timings (e.g., an initialization timing during a display driving timing or a sensing driving period), the second transistor T2 may be turned on through the second scan signal SCAN2 to transmit a reference voltage Vref supplied to the reference voltage line RVL to a second node N2 of the driving transistor DRT.

[0077] Synchronized with the relevant driving timing (e.g., the sampling timing in the sensing driving period), the second transistor T2 can be turned on by the second scan signal SCAN2 to transfer the voltage of the second node N2 of the driving transistor DRT to the reference voltage line RVL.

[0078] In other words, the second transistor T2 can control the voltage state of the second node N2 of the driving transistor DRT, or transfer the voltage of the second node N2 of the driving transistor DRT to the reference voltage line RVL.

[0079] The reference voltage line RVL can be electrically connected to an analog-to-digital converter, which senses the voltage of the reference voltage line RVL, converts the voltage into a digital value, and outputs sensing data including the digital value.

[0080] The analog-to-digital converter can be included in a source driver integrated circuit (SDIC) that implements a data driver DDR.

[0081] The sensing data output from the analog-to-digital converter can be used to sense characteristic values of the driving transistor DRT (e.g., threshold voltage or mobility) or characteristic values of an organic light-emitting diode (OLED) (e.g., threshold voltage).

[0082] The capacitor Cst can be an external capacitor intentionally designed outside the driving transistor DRT, rather than a parasitic capacitor (e.g., Cgs or Cgd) that exists as an internal capacitor between the first node N1 and the second node N2 of the driving transistor DRT.

[0083] The third node N3 of the driving transistor DRT can be a drain node or a source node, to which a driving voltage EVDD can be applied. The third node N3 can be electrically connected to the driving voltage line DVL, through which the driving voltage EVDD is provided.

[0084] The storage capacitor Cst can be electrically connected between the first node N1 and the second node N2 of the driving transistor DRT to maintain a data voltage Vdata corresponding to the image signal voltage or a voltage corresponding to the data voltage Vdata during a single frame time (or a predetermined time).

[0085] Each of the driving transistor DRT, the first transistor T1, and the second transistor T2 can be an n-type transistor or a p-type transistor.

[0086] 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 respectively applied to the gate node of the first transistor T1 and the gate node of the second transistor T2 through different gate lines.

[0087] In some cases, the first scan signal SCAN1 and the second scan signal SCAN2 may be the same gate signal. In this case, the first scan signal SCAN1 and the second scan signal SCAN2 may be commonly applied to the gate nodes of the first transistor T1 and the second transistor T2 through the same gate line.

[0088] Figure 2 Each sub-pixel structure shown is merely an example, and one or more transistors may be omitted or added, and in some cases, one or more capacitors may be added.

[0089] Multiple sub-pixels may have the same structure, or some of the multiple sub-pixels may have different structures.

[0090] The brightness of the panel PNL may vary according to the amount of light emitted from the organic light-emitting diode (OLED) disposed in the active area A / A and exposed to the outside. In other words, as the amount of light emitted and extracted from the OLED increases, the brightness of the panel PNL may increase. The structure of the thin-film transistor array film having a structure with improved light extraction is described below.

[0091] At least one sub-pixel among the multiple sub-pixels disposed in the active area may include at least one recess in the insulating film.

[0092] The organic light-emitting display panel will be described in more detail below with reference to various drawings.

[0093] Figure 3 is a plan view showing a light-emitting portion and a non-light-emitting portion included in the active area of the organic light-emitting display panel according to an embodiment of the present disclosure. Figure 4 is a cross-sectional view showing a region taken along line A-B of Figure 3 and a part of the pad region. Figure 4 Only a partial configuration provided in one sub-pixel SP and a partial region may be shown, for example, a partial configuration provided in the pad region and the partial region.

[0094] Referring to Figure 3 , a plurality of light-emitting portions EA and a plurality of non-light-emitting portions NEA are provided in the active area A / A.

[0095] As Figure 3 shown, the light-emitting portions EA of at least two or more sub-pixels SP may have different sizes, but the embodiments of the present disclosure are not limited thereto.

[0096] Each sub-pixel SP provided in the active area A / A may include a plurality of light-emitting portions EA1 and EA2.

[0097] Specifically, a sub-pixel SP may include a first light-emitting portion EA1 and a second light-emitting portion EA2 surrounding the first light-emitting portion EA1.

[0098] A first non-light-emitting portion NEA1 may be provided between the first light-emitting portion EA1 and the second light-emitting portion EA2.

[0099] In other words, the first light-emitting portion EA1 and the second light-emitting portion EA2 may be distinguishable from each other by the first non-light-emitting portion NEA1.

[0100] The first non-light-emitting portion NEA1 may be smaller in size than the first light-emitting portion EA1 and the second light-emitting portion EA2.

[0101] When the display device is in the on state, the first non-light-emitting portion NEA1 may be in a black state, or due to light incident from at least one of the first light-emitting portion EA1 and the second light-emitting portion EA2, the first non-light-emitting portion NEA1 may have a lower brightness than the first light-emitting portion EA1 and the second light-emitting portion EA2.

[0102] As Figure 3 shown, in a plan view, the first light-emitting portion EA1, the second light-emitting portion EA2, and the first non-light-emitting portion NEA1 may all be octagonal. However, embodiments of the present disclosure are not limited thereto. For example, the first light-emitting portion EA1, the second light-emitting portion EA2, and the first non-light-emitting portion NEA1 may each be shaped into a circle, an ellipse, or a polygon such as a triangle, a square, or a hexagon, or a combination thereof.

[0103] A pair of the first light-emitting portion EA1 and the second light-emitting portion EA2 may be spaced apart from another pair of the first light-emitting portion EA1 and the second light-emitting portion EA2, and a second non-light-emitting portion NEA2 may be provided between the pair of the first light-emitting portion EA1 and the second light-emitting portion EA2 and the other pair of the first light-emitting portion EA1 and the second light-emitting portion EA2.

[0104] The second non-light-emitting portion NEA2 may be a region corresponding to all or part of a circuit region in which a circuit for driving the first light-emitting portion EA1 and the second light-emitting portion EA2 is provided.

[0105] When the display device is in the on state, the second non-light-emitting portion NEA2 may be in a black state, or may have a lower brightness than the first light-emitting portion EA1 and the second light-emitting portion EA2 due to light incident from the second light-emitting portion EA2.

[0106] When the first non-light-emitting portion NEA1 and the second non-light-emitting portion NEA2 have a lower brightness than the first light-emitting portion EA1 and the second light-emitting portion EA2, the brightness of the first non-light-emitting portion NEA1 may be higher than the brightness of the second non-light-emitting portion NEA2, but embodiments of the present disclosure are not limited thereto.

[0107] Referring to Figure 4 , in the active region A / A (the region intercepted along line A - B), the following are provided: a transistor TR disposed on a substrate 410 and an organic light emitting diode (OLED) electrically connected to the transistor TR. In the non - active region N / A, there is at least one pad region.

[0108] The transistor TR includes an active layer 421, a gate electrode 423, a source electrode 424, and a drain electrode 425.

[0109] The organic light emitting diode (OLED) includes a first electrode 450, an organic layer 460 including a light emitting layer, and a second electrode 470. The first electrode 450 may be an anode electrode, and the second electrode 470 may be a cathode electrode, but the embodiments of the present disclosure are not limited thereto.

[0110] Specifically, a buffer layer 411 is disposed on the substrate 410. The active layer 421 of the transistor TR is disposed on the buffer layer 411. A gate insulating film 422 is disposed on the active layer 421, and a gate electrode 423 is disposed on the gate insulating film 422.

[0111] Although not shown in Figure 4 , according to the embodiments of the present disclosure, the active layer 421 may include a channel region, and the channel region of the active layer 421 may overlap with the gate insulating film 422 and the gate electrode 423. In other words, the gate insulating film 422 and the gate electrode 423 may be disposed on the channel region of the active layer 421.

[0112] An interlayer insulating film 412 is disposed on the gate electrode 423. The source electrode 424 and the drain electrode 425 are disposed on the interlayer insulating film 412. The source electrode 424 and the drain electrode 425 may be spaced apart from each other on the interlayer insulating film 412. Each of the source electrode 424 and the drain electrode 425 may be in contact with the active layer 421 through a hole formed in the interlayer insulating film 412.

[0113] Although the transistor TR may be disposed on the substrate 410 in the above - described structure, the transistor structure of the present disclosure is not limited thereto.

[0114] For example, the gate electrode 423 may be disposed on the substrate 410, the active layer 421 may be disposed on the gate electrode 423, the source electrode 424 may be disposed to overlap with one end of the active layer 421, and the drain electrode 425 may be disposed to overlap with the opposite end of the active layer 421 on the active layer 421.

[0115] A protective film 413 may be disposed while covering the transistor TR.

[0116] An insulating film 440 may be disposed on the protective film 413.

[0117] The insulating film 440 may be formed of an organic material, but embodiments of the present disclosure are not limited thereto.

[0118] In one sub-pixel region, the insulating film 440 may have at least one recess 443. The insulating film 440 may have a surrounding portion 444 that surrounds and is positioned around the recess 443. The recess 443 may include a flat portion 441 and an inclined portion 442 that surrounds the flat portion 441.

[0119] The surface of the flat portion 441 of the recess 443 may be parallel to the surface of the substrate 410, and the inclined portion 442 may surround the flat portion 441, and a predetermined angle may be formed between the surface of the inclined portion 442 and the surface of the substrate 410. In other words, the surface of the inclined portion 442 may not be parallel to the surface of the substrate 410.

[0120] The insulating film 440 may have a contact hole CH spaced apart from the recess 443.

[0121] In at least one sub-pixel region, the first electrode 450 may be disposed on the recess 443 and the surrounding portion 444 of the insulating film 440.

[0122] In a region overlapping with the recess 443, the first electrode 450 includes: a first region 451 in which the top surface of the first electrode 450 is parallel to the surface of the substrate 410; and a second region 452 extending from the first region 451. In the second region 452, a predetermined angle is formed between the top surface of the first electrode 450 and the substrate 410. In other words, the surface of the second region 452 may not be parallel to the surface of the substrate 410. The first electrode 450 includes a third region 453 extending from the second region 452, and in the third region 453, the top surface of the first electrode 450 is parallel to the surface of the substrate 410. The third region 453 may be a region overlapping with the surrounding portion 444 of the insulating film 440.

[0123] As described above, in at least one sub-pixel region, the insulating film 440 may include at least one contact hole CH spaced apart from the recess 443, and the transistor TR may be electrically connected to the first electrode 450 of the organic light-emitting diode (OLED) through the contact hole CH of the insulating film 440.

[0124] Specifically, the first electrode 450 may be electrically connected to the source electrode 424 or the drain electrode 425 of the transistor TR.

[0125] At least one protrusion 454 may be provided on the top surface of the first electrode 450 of the organic light-emitting diode (OLED).

[0126] For example, asFigure 4 As shown, protrusions 454 can be provided on the top surface of the first electrode 450 in regions corresponding to the first to third regions 451, 452, and 453 of the first electrode 450.

[0127] Alternatively, the protrusions 454 can be provided in the entire region corresponding to the region of the recess 443 where the insulating film 440 is provided, or in the entire region corresponding to the region of the surrounding portion 444 where the insulating film 440 is provided. In this case, the protrusions 454 can also be provided on the top surface of the first electrode 450 provided in the contact hole CH.

[0128] At least one protrusion 454 can be formed integrally with the first electrode 450. However, embodiments of the present disclosure are not limited thereto. For example, there can be a boundary between at least one protrusion 454 and the first electrode 450.

[0129] When a plurality of protrusions 454 are provided on the top surface of the first electrode 450, some of the protrusions 454 can be spaced apart from each other or positioned adjacent to each other. The plurality of protrusions 454 can be provided at regular intervals (including the case where the interval is 0), with regular sizes or shapes, or can be provided at different intervals or with different sizes or shapes.

[0130] The following will refer to Figure 5 describe in detail the arrangement of the plurality of protrusions 454.

[0131] Figure 5 is a diagram showing the arrangement of a plurality of protrusions on the top surface of the first electrode.

[0132] Referring to Figure 5 , a plurality of protrusions 454 can be provided along a plurality of rows and a plurality of columns. For example, the plurality of protrusions 454 can be provided in a matrix form. At least two of the protrusions provided in the same row or the same column can be positioned adjacent to each other, but embodiments of the present disclosure are not limited thereto.

[0133] The plurality of protrusions 454 can be irregularly arranged on the top surface of the first electrode 450. In this case, the plurality of protrusions 454 can have irregular sizes and shapes, but embodiments of the present disclosure are not limited thereto. For example, the plurality of protrusions 454 can have regular sizes or regular shapes.

[0134] Each of the plurality of protrusions 454 can be formed into various shapes, such as a hemispherical shape, a hemispherical body, or a polyhedron. On the other hand, the cross-section of the protrusion 454 can be formed into various shapes, such as a circular shape, an elliptical shape, or a polygonal shape.

[0135] The plurality of protrusions 454 can be formed integrally with the first electrode 450, as Figure 4As shown, or a plurality of protrusions 454 may be separated from the first electrode 450, as Figure 5 shown.

[0136] The plurality of protrusions 454 and the first electrode 450 may include corresponding materials to each other or may include different materials.

[0137] As Figure 4 shown, a bank 480 may be provided on a part of the insulating film 440 and the first electrode 450.

[0138] The bank 480 may include: a first portion 481 provided in a region corresponding to a part of the recess 443 provided in the insulating film 440 on the first electrode 450; and a second portion 482 provided on the insulating film 440 and the first electrode 450 in a region corresponding to the surrounding portion 444 provided in the insulating film 440.

[0139] The bank 480 may be provided to expose a part of the top surface of the first electrode 450 in the region overlapping with the recess 443. In other words, at least one sub-pixel may have a region where the first electrode 450 does not overlap with the bank 480.

[0140] An organic layer 460 having an emission layer may be provided on the first electrode 450 that does not overlap with the bank 480. The organic layer 460 may be provided on the top surface of the first electrode 450 that does not overlap with the bank 480.

[0141] The organic layer 460 may have a surface shape corresponding to the top surface shape of the first electrode 450 having at least one protrusion 454. That is to say, the surface shape of the organic layer 460 may have a surface shape formed along the shape of the protrusion 454 provided on the top surface of the first electrode 450.

[0142] The second electrode 470 may be provided to cover both the organic layer 460 and the bank 480 at the same time.

[0143] The second electrode 470 may have a surface shape corresponding to the surface shape of the organic layer 460 in the region overlapping with the organic layer 460. That is to say, the second electrode 470 may also have a surface shape formed along the shape of the protrusion 454.

[0144] The organic layer 460 of the organic light-emitting diode (OLED) may be formed by deposition or coating characterized by straightness. For example, the organic layer 460 may be formed by physical vapor deposition (PVD) such as evaporation.

[0145] Formed by this method, the organic layer 460 may have a first thickness in a region having a predetermined angle with the horizontal surface and a second thickness in a region parallel to the horizontal surface, where the first thickness is less than the second thickness.

[0146] For example, the thickness of the organic layer 460 provided in a region corresponding to the inclined portion 442 of the concave portion 443 may be smaller than the thickness of the organic layer 460 provided on the top surface of the first electrode 450 exposed by the bank 480. In addition, the thickness of the organic layer 460 provided in a region corresponding to the inclined portion 442 of the concave portion 443 may be smaller than the thickness of the organic layer 460 provided on the surrounding portion 444 of the insulating film 440.

[0147] Therefore, when driving an organic light-emitting diode (OLED), the region where the thickness of the organic layer 460 is relatively small, that is, the region corresponding to the inclined portion 442 of the concave portion 443, may have the highest current density, and a strong electric field may be applied to the region corresponding to the inclined portion 442 of the concave portion 443.

[0148] The light-emitting characteristics of the organic light-emitting diode (OLED) in the region corresponding to the inclined portion 442 of the concave portion 443 may be different from those of the organic light-emitting diode (OLED) in the region corresponding to the flat portion 441 of the concave portion 443, and the OLED may be deteriorated.

[0149] According to an embodiment of the present disclosure, since the bank 480 is provided to cover the inclined portion 442 of the concave portion 443, it is possible to prevent the OLED from being deteriorated in the region corresponding to the inclined portion 442 of the concave portion 443, and it is possible to prevent the phenomenon that the light-emitting characteristics are different in each region.

[0150] However, according to an embodiment of the present disclosure, the thickness condition for the organic layer 460 is not limited thereto, but the organic layer 460 may have a corresponding thickness at each position.

[0151] Meanwhile, the first electrode 450 may include a light-reflecting metal. Although Figure 4 The configuration in which the first electrode 450 is a single layer is shown, but the embodiments of the present disclosure are not limited thereto, and the first electrode 450 may be formed into a multilayer structure. When the first electrode 450 has a multilayer structure, at least one layer may include a light-reflecting metal.

[0152] For example, the first electrode 450 may include, but is not limited to, at least any one of aluminum, neodymium, nickel, titanium, tantalum, copper (Cu), silver (Ag), and aluminum alloy.

[0153] The second electrode 470 may include a light-transmissive or semi-light-transmissive conductive material. For example, the second electrode 470 may include at least one transparent conductive oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide, or tin oxide, or may include a semi-light-transmissive metal such as magnesium, silver (Ag), or an alloy of magnesium and silver. When the source electrode 424 includes a semi-light-transmissive metal, the thickness of the source electrode 424 may be less than the thickness of the first electrode 450.

[0154] At least one protrusion 454 disposed on the top surface of the first electrode 450 may include at least one of silicon (Si), a light-reflective metal, or a transparent conductive oxide.

[0155] The first electrode 450 may be disposed to cover both the flat portion 441 and the inclined portion 442 of the recess 443 of the insulating film 440 simultaneously.

[0156] Accordingly, a part of the light emitted from the organic layer 460 including the emission layer may be transmitted through the second electrode 470 and extracted to the outside of the panel PNL.

[0157] Another part of the light emitted from the organic layer 460 may be guided to the first electrode 450, that is, the first part 451 of the first electrode 450 disposed at a position corresponding to the flat portion 441, and be reflected by the first electrode 450 or be rerouted to the source electrode 424 through at least one protrusion 454 disposed on the top surface of the first part 451, and finally be extracted to the outside of the panel PNL.

[0158] At least one protrusion 454 may allow the light reflected by the first electrode 450 and thus not extracted to the outside to be extracted to the outside.

[0159] Specifically, the surface on which the protrusion 454 is formed on the top surface of the first electrode 450 may have a predetermined slope with respect to the extending direction of the top surface of the first electrode 450. When the incident angle of the light to the inclined surface on which the protrusion 454 is formed is within the critical angle, multiple reflections can be enabled, thereby improving the light extraction efficiency.

[0160] In this way, at least one protrusion 454 increases the amount of light extracted to the outside, thereby reducing the light trapped in the organic light-emitting diode (OLED).

[0161] Yet another part of the light emitted from the organic layer 460 may be rerouted by at least one protrusion 454 disposed on the top surface of the first electrode 450 in the region corresponding to the inclined portion 442, and be extracted to the outside of the panel PNL.

[0162] Light that is not rerouted by the protrusion 454 not disposed on the inclined portion 442 can pass through the first protrusion 454 and be reflected by the first electrode 450 including a light-reflective metal and be extracted to the outside of the panel PNL.

[0163] As described above, placing the first electrode 450 of the organic light-emitting diode (OLED) on the inclined portion 442 of the recess 443 of the insulating film 440 and providing at least one protrusion 454 on the top surface of the first electrode 450 can improve the light extraction efficiency of the organic light-emitting display panel.

[0164] As Figure 4 shown, an auxiliary electrode AE (which may also be referred to as an auxiliary line) in contact with the second electrode 470 can also be provided in a region corresponding to the second non-light-emitting portion NEA2 in the active region A / A.

[0165] Specifically, the auxiliary electrode 430 can be provided on the interlayer insulating film 412. The protective film 413, the insulating film 440, and the bank 480 can have holes for exposing the auxiliary electrode 430. The second electrode 470 can be in contact with the auxiliary electrode 430 through the holes formed in the protective film 413, the insulating film 440, and the bank 480 for exposing the auxiliary electrode 430.

[0166] For example, when the organic light-emitting display panel is a large-sized display panel, a voltage drop may occur due to the resistance of the second electrode 470, resulting in a difference in brightness between the periphery and the center of the panel. However, in the organic light-emitting display panel, according to the present disclosure, the auxiliary electrode 430 in contact with the second electrode 470 can prevent the voltage drop. This can prevent the difference in brightness that may occur when the organic light-emitting display panel is a large-sized panel.

[0167] Although Figure 4 a configuration in which one auxiliary electrode 430 is provided in each sub-pixel SP is shown, embodiments of the present disclosure are not limited thereto. For example, one auxiliary electrode 430 can be provided for every plurality of sub-pixels SP.

[0168] Unless the organic light-emitting display panel according to the embodiments of the present disclosure is a large-sized panel, the auxiliary electrode 430 can be omitted.

[0169] As Figure 4 shown, a storage capacitor Cst can be provided in the active region A / A. The storage capacitor Cst can include: a first storage capacitor electrode 431 provided on the same layer as the gate electrode 423; and a second storage capacitor electrode 432 provided on the same layer as the source electrode 424 and the drain electrode 425, but the structure of the storage capacitor Cst of the present disclosure is not limited thereto.

[0170] According to an embodiment of the present disclosure, an organic light emitting display panel includes a pad region disposed in a non-active region. A plurality of pad electrodes 433 and 434 may be disposed in the pad region.

[0171] For example, a first pad electrode 433 may be disposed on a gate insulating film 422 disposed in the pad region. An interlayer insulating film 412 may be disposed on the first pad electrode 433 to expose a part of the top surface of the first pad electrode 433. A second pad electrode 434 in contact with the first pad electrode 433 may be disposed on the first pad electrode 433 and the interlayer insulating film 412.

[0172] Although not shown in Figure 4 , the second pad electrode 434 may be electrically connected to various circuit films.

[0173] Hereinafter, with reference to Figures 6 to 8 The structure and optical path of an organic light emitting display panel according to an embodiment of the present disclosure will be described in more detail.

[0174] Figure 6 is an enlarged view of region X showing Figure 4 . Figure 7 is an enlarged view of region Y showing Figure 4 . Figure 8 is an enlarged view of region Z showing Figure 4 .

[0175] With reference to Figure 6 , at least one sub-pixel SP may include at least one emission region EA, and one emission region EA may include at least two light emitting portions EA1 and EA2. One non-light emitting portion NEA1 may be disposed between the two light emitting portions EA1 and EA2.

[0176] Specifically, the first light emitting portion EA1 may be a region corresponding to a part of the concave portion 443 of the insulating film 440.

[0177] On the other hand, the first light emitting portion EA1 may be a region in the flat portion 441 of the concave portion 443 that does not overlap with the first part 481 of the bank 480.

[0178] The first light emitting portion EA1 may be a region where a part L1 of the light emitted from the organic layer 460 is extracted to the outside of the panel PNL via the organic layer 460 and the second electrode 470.

[0179] The first light emitting portion EA1 may be a region where a part L1 of the light (hereinafter may be referred to as the first light) emitted from the organic layer 460 reaches the first electrode 450, is reflected by the first electrode 450, and is extracted to the outside of the panel PNL via the organic layer 460 and the second electrode 470.

[0180] The first light-emitting part EA1 can be surrounded by the first non-light-emitting part NEA1.

[0181] The first non-light-emitting part NEA1 can correspond to the region where the bank 480 overlaps with the flat part 441 of the recess 443. Specifically, the first non-light-emitting part NEA1 can correspond to the region where the first part 481 of the bank 480 overlaps with the flat part 441 of the recess 443.

[0182] The first non-light-emitting part NEA1 can be a region where a part L3 of the light emitted from the organic layer 460 is guided to the region corresponding to the first part 481 of the bank 480 but may not be extracted to the outside. In other words, the first non-light-emitting part NEA1 can be a region where the light emitted from the organic layer 460 in a direction parallel to the flat part 441 reaches the first electrode 450 but is trapped in the sub-pixel instead of being reflected to the outside.

[0183] The second light-emitting part EA2 can be arranged to surround the first non-light-emitting part NEA1. The second light-emitting part EA2 can be a region corresponding to the region where the first electrode 450 overlaps with the inclined part 442 of the recess 443. On the other hand, the second light-emitting part EA2 can be a region corresponding to the second region 452 of the first electrode 450.

[0184] A part L2 of the light (hereinafter may be referred to as the second light) emitted from the organic layer 460 can be guided to the region corresponding to the second region 452 of the first electrode 450.

[0185] Specifically, the second light L2 travels through the first part 481 of the bank 480 to reach the region corresponding to a part of the second region 452 of the first electrode 450. After reaching the first electrode 450, the second light L2 is reflected by the first electrode 450 and is extracted to the outside through the first part 481 of the bank 480, the organic layer 460, and the second electrode 470. When the second light L2 is extracted in this way, the second light-emitting part EA2 is formed.

[0186] The first non-light-emitting part NEA1 provided between the first light-emitting part EA1 and the second light-emitting part EA2 can be a region where visible light rays from the first light-emitting part EA1 and visible light rays from the second light-emitting part EA2 are mixed, but the embodiments of the present disclosure are not limited thereto.

[0187] The second non-light-emitting part NEA2 can be arranged to surround the second light-emitting part EA2. The second non-light-emitting part NEA2 can correspond to the region where the second part 482 of the bank 480 is provided.

[0188] In an organic light-emitting display panel according to an embodiment of the present disclosure, the inclined portion 442 of the recess 443 and the bank 480 provided on the inclined portion 442 of the recess 443 may have specific conditions to increase the amount of light extracted from the second light-emitting portion EA2.

[0189] Referring to Figure 7 , the height H1 (or the depth of the recess) of the inclined portion 442 of the insulating film 440 may be 0.7 μm or more. The height H1 of the inclined portion 442 refers to the minimum distance from the following line to the surrounding portion 444: this line extends from the surface of the flat portion 441 of the recess 443 parallel to the surface of the substrate 410.

[0190] According to an embodiment of the present disclosure, the height H1 of the inclined portion 442 of the insulating film 440 where the recess 443 is located is not limited to the above value. For example, the height H1 may be any height at which the components below the insulating film 440 are not exposed by the recess 443 of the insulating film 440.

[0191] The height H1 of the inclined portion 442 may be greater than the height H2 of the bank 480 provided on the surrounding portion 444 of the insulating film 440. On the other hand, the height H1 of the inclined portion 442 may be equal to the height H2 of the second portion of the bank 480.

[0192] In this way, as the height H1 of the inclined portion 442 increases, the amount of light reflected in the second region 452 of the first electrode 450 increases, thereby improving the light extraction efficiency.

[0193] The angle a between the inclined portion 442 of the recess 443 and the horizontal surface may be not less than 27° and less than 80°.

[0194] When the angle a is less than 27°, the light emitted from the organic layer 460 may not reach the first electrode 450 provided on the inclined portion 442, but may be transmitted to another adjacent sub-pixel, resulting in color mixing, or may be trapped in the panel PNL without being extracted to the outside.

[0195] When the angle a exceeds 80°, an open circuit may occur in the first electrode 450 provided on the inclined portion of the insulating film 440, for example.

[0196] In the region corresponding to the inclined portion 442 of the recess 443, the distance W between the bank 480 and the surface of the first electrode 450 may not exceed 3.2 μm, may not exceed 2.6 μm, or may not exceed 2.0 μm.

[0197] On the other hand, in the second region 452 of the first electrode 450, the distance W between the bank 480 and the surface of the first electrode 450 may not exceed 3.2 μm, may not exceed 2.6 μm, or may not exceed 2.0 μm.

[0198] As W decreases, the first light-emitting portion EA1 can be enlarged, and the optical path of the light reflected and extracted from the second region 452 can be shortened, thereby improving the light extraction efficiency. Therefore, although there is no particular limitation on the lower limit of W, it can be not less than 0.1 μm, not less than 0.3 μm, or not less than 0.5 μm.

[0199] By adjusting the range of W as described above, the first light-emitting portion EA1 can be enlarged, and the light extraction efficiency in the organic light-emitting display panel can be improved.

[0200] Among the light emitted from the organic layer 460, the second light L2 that reaches the region corresponding to a part of the second region 452 of the first electrode 450 passes through the bank 480 at least twice until it is extracted to the outside of the panel.

[0201] When the bank 480 includes a colored organic material or a colored inorganic material, light with a short wavelength in the visible light wavelength spectrum can be absorbed and thus does not pass through the bank 480 and the second light-emitting portion EA2 where the second light L2 is extracted, and the color coordinates of the first light-emitting portion EA1 where the first light L1 is extracted to the outside can be changed. For example, the color coordinates of the second light-emitting portion EA2 can be shifted to a wavelength band longer than the wavelength band of the color coordinates of the first light-emitting portion EA1.

[0202] When the bank 480 includes a transparent organic material or a transparent inorganic material, the color coordinates of the light emitted from the first light-emitting portion EA1 can correspond to the color coordinates of the light emitted from the second light-emitting portion EA2.

[0203] In the organic light-emitting display device according to an embodiment of the present disclosure, light extraction can also be achieved by at least one protrusion 454 of the first electrode 450 provided in the contact hole CH.

[0204] The following refers to Figure 8 This will be described.

[0205] Refer to Figure 8 , a part L4 of the light emitted from the organic layer 460 can be extracted to the outside of the panel PNL through at least one protrusion 454 provided in the contact hole CH, in which the first electrode 450 is connected to the drain electrode 425 of the thin film transistor TR.

[0206] Specifically, a part L4 of the light emitted from the organic layer 460 including the emission layer can be guided to the region corresponding to the first part 481 of the bank 480, and the light rays of the light L4 that are not absorbed by the bank 480 can pass through the insulating film 440 and reach the first electrode 450 provided in the contact hole CH.

[0207] Depending on the thickness of the first electrode 450 disposed in the contact hole CH, the light that has reached the first electrode 450 can be absorbed by the first electrode 450 or extracted to the outside of the panel PNL through at least one protrusion 454 disposed on the top surface of the first electrode 450.

[0208] For example, when the first electrode 450 including a light reflecting material is thin enough, the light that has reached the first electrode 450 disposed in the contact hole CH can reach the protrusion 454 disposed on the top surface of the first electrode 450, and the protrusion 454 can guide the light L4 to reflect and extract it to the outside of the panel PNL.

[0209] In this case, compared with Figure 6 the second light emitting part EA2, the second light emitting part EA2 can be increased.

[0210] In other words, in one sub-pixel, the second light emitting part EA2 may include: an area where the first electrode 450 overlaps with the inclined part 442 of the concave part 443 of the insulating film 440 until an area where the first electrode 450 is disposed on at least one side surface of the contact hole CH (the contact hole where the first electrode contacts the thin film transistor) of the insulating film 440.

[0211] However, in this case, when the second light emitting part EA2 is away from the area where the first electrode 450 overlaps with the inclined part 442, the brightness of the second light emitting part EA2 may be reduced.

[0212] This structure allows for a larger emission area in the active region of the organic light emitting display device according to an embodiment of the present disclosure.

[0213] Hereinafter, with reference to Figure 9 the effects of the display device according to an embodiment of the present disclosure will be discussed.

[0214] Figure 9 is a graph showing the light extraction efficiency and the contrast (automatically adjusted by the light radiated from the outside) depending on the viewing angle of the organic light emitting display device according to the comparative example and the organic light emitting display device according to an embodiment of the present disclosure.

[0215] The organic light emitting display device according to the comparative example lacks the concave part 443 in the insulating film 440 and the protrusion 454 on the top surface of the first electrode 450 as Figure 4 shown, while the organic light emitting display device according to an embodiment of the present disclosure has Figure 4 such a structure.

[0216] With reference to Figure 9, when the light extraction efficiency of the display device according to the comparative example is 100%, the light extraction efficiency of the organic light-emitting display device according to the present embodiment is 116%, and the light extraction efficiency of the organic light-emitting display device according to the present embodiment is higher than that of the display device according to the comparative example.

[0217] It can also be determined that, although there are recesses 443 in the insulating film 440 in the regions corresponding to the first light-emitting portion and the second light-emitting portion and at least one protrusion 454 on the top surface of the first electrode 450, there is no difference in the contrast ratio between the organic light-emitting display device according to the present embodiment and the organic light-emitting display device according to the comparative example.

[0218] In this way, the organic light-emitting display device according to the embodiment of the present disclosure can improve the light extraction efficiency without degrading the viewing angle characteristics.

[0219] Although Figures 4 to 8 An example in which a plurality of protrusions 454 are provided on the entire top surface of the first electrode 450 is shown, but the embodiment of the present disclosure is not limited thereto.

[0220] Next, refer to Figure 10 Discuss another arrangement of the protrusion 454 on the top surface of the first electrode 450.

[0221] Figure 10 FIG. is a cross-sectional view showing an organic light-emitting display device according to another embodiment of the present disclosure.

[0222] The configurations and effects that are substantially the same as those described above will not be repeatedly described below.

[0223] Refer to Figure 10 , at least one protrusion 1054 can be provided on the top surface of the first electrode 1050.

[0224] The protrusion 1054 can be provided on a part of the top surface of the first electrode 1050 that is provided in a region corresponding to the region where the recess 443 in the insulating film 440 is provided. Specifically, at least one protrusion 1054 can be provided on the top surface of the first electrode 1050 that is provided in a region corresponding to the inclined portion 442 where the recess 443 is provided, but at least one protrusion 1054 may not be provided on the top surface of the first electrode 1050 that is provided in a region corresponding to the flat portion 441 where the recess 443 is provided.

[0225] The protrusion 1054 can be provided on the entire top surface of the first electrode 1050 that is provided in a region corresponding to the surrounding portion 444 of the insulating film 440.

[0226] A portion of the light emitted from the organic layer 460 can be rerouted by at least one protrusion 454 provided on the top surface of the first electrode 450 in a region corresponding to the inclined portion 442, and extracted to the outside of the panel PNL.

[0227] This can prevent light leakage that may occur when light emitted from one sub-pixel travels to another sub-pixel, while improving light extraction efficiency.

[0228] As described above, since no protrusion 1054 is provided on the top surface of the first electrode 1050 in a region corresponding to the region of the flat portion 441 where the insulating film 440 is provided, the surface of the first electrode 1050 can be flattened in the region corresponding to the region of the flat portion 441 where the insulating film 440 is provided.

[0229] Therefore, as Figure 10 shown, the surface of the organic layer 1060 provided on the top surface of the first electrode 1050 exposed by the bank 480 can be flattened.

[0230] In addition, the surface of the source electrode 424 in a region overlapping with the organic layer 1060 can be flattened.

[0231] Although Figure 10 shows a configuration in which no plurality of protrusions 1054 are provided on the entire top surface of the first electrode 1050 in a region corresponding to the region of the flat portion 441 where the recess 443 is provided, embodiments of the present disclosure are not limited thereto. For example, such a configuration can satisfy that protrusions 1054 can be provided on a part of the top surface of the first electrode 1050 in a region corresponding to the region of the recess 443 where the insulating film 440 is provided, or protrusions 1054 can be provided on a part of the top surface of the first electrode 1050 in a region corresponding to the region of the surrounding portion 444 where the insulating film 440 is provided.

[0232] In this way, the density of the protrusions 454 provided in the region corresponding to the region of the flat portion 441 where the recess 443 is provided can be different from the density of the protrusions 454 provided in the region corresponding to the region of the inclined portion 442 where the recess 443 is provided.

[0233] Although Figures 4 to 8 and Figure 10 show a configuration in which the organic layer 460 or 1060 of the organic light-emitting diode (OLED) is provided on the first electrode 450 or 1050 exposed by the bank 480, embodiments of the present disclosure are not limited thereto.

[0234] Next, refer to Figure 11 to describe the structure of an organic light-emitting display device according to another embodiment of the present disclosure.

[0235] Figure 11 is a cross-sectional view showing an organic light-emitting display device according to another embodiment of the present disclosure.

[0236] Configurations and effects that are substantially the same as those described above will not be repeatedly described below.

[0237] In Figure 11 's structure, different from Figure 4 's structure, the organic layer 1160 of the organic light-emitting diode (OLED) can overlap with the first electrode 450 and can be disposed in a region overlapping with the top surface of the bank 480.

[0238] In this case, in order for the second electrode 1170 and the auxiliary electrode 430 to be in contact with each other, the bank 480 can have such a structure that prevents the material of the organic layer 1160 from being deposited on the auxiliary electrode 430 during the formation of the organic layer 1160.

[0239] Specifically, as Figure 11 shown, the bank 480 can be shaped to narrow in a region around the hole exposing the auxiliary electrode 430 as the bank 480 moves away from the substrate 410. In other words, as the bank 480 moves further away from the substrate 410, the mouth of the hole in the bank 480 exposing the auxiliary electrode 430 can become narrower.

[0240] As a process for forming the organic layer 1160, deposition or coating in which the source material is characterized by straightness can be employed. For example, evaporation can be used. As a process for forming the second electrode 1170, deposition or coating in which the source material has irregular directivity can be used. For example, sputtering can be used.

[0241] Because the mouth of the hole in the bank 480 exposing the auxiliary electrode 430 is narrow, due to the processing characteristics of the organic layer 1160, the organic layer 1160 may not be disposed on the auxiliary electrode 430. Although the mouth of the hole in the bank 480 is narrow, due to the processing characteristics of the second electrode 1170, the source material of the second electrode 1170 can enter the hole, so the second electrode 1170 can also be formed on the auxiliary electrode 430.

[0242] The organic light-emitting display panel according to an embodiment of the present disclosure can have at least one pixel, and one pixel can have at least two sub-pixels.

[0243] Each sub-pixel can have one first electrode.

[0244] At least one protrusion can be disposed on the top surface of the first electrode in at least one of the plurality of sub-pixels included in the organic light-emitting display panel.

[0245] The following will refer to Figures 12 to 16 a configuration in which protrusions are provided on the top surface of a first electrode in a pixel including a plurality of sub-pixels.

[0246] Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16 are diagrams showing the protrusions on the top surface of the first electrode in a pixel.

[0247] The configurations and effects that are substantially the same as the above-described ones will not be repeatedly described hereinafter.

[0248] Referring to Figure 12 , a pixel P may include a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4. Although Figure 12 a configuration in which a pixel P includes four sub-pixels is shown, embodiments of the present disclosure are not limited thereto, and a pixel P has two or more sub-pixels.

[0249] According to an embodiment of the present disclosure, the first sub-pixel to the fourth sub-pixel SP1, SP2, SP3, and SP4 may emit light of different colors. For example, the first sub-pixel SP1 may be a sub-pixel for emitting red light, the second sub-pixel SP2 may be a sub-pixel for emitting green light, the third sub-pixel SP3 may be a sub-pixel for emitting blue light, and the fourth sub-pixel SP4 may be a sub-pixel for emitting white light.

[0250] However, the above configuration is merely an example, and in the present embodiment, at least two of the first sub-pixel to the fourth sub-pixel SP1, SP2, SP3, and SP4 emit light of different colors.

[0251] The first electrode 450 of an organic light-emitting diode (OLED) may be provided in each of the first sub-pixel to the fourth sub-pixel SP1, SP2, SP3, and SP4. A plurality of protrusions 1254 may be provided on the top surface of the first electrode 450.

[0252] The protrusions 1254 provided in the sub-pixels SP1, SP2, SP3, and SP4 respectively may correspond to each other in size and shape.

[0253] In each of the sub-pixels SP1, SP2, SP3, and SP4, the plurality of protrusions 1254 provided in each of the sub-pixels SP1, SP2, SP3, and SP4 may be spaced apart from each other, and thus, different protrusions 1254 may be maintained at a constant pitch.

[0254] Although Figures 4 to 11The configuration is shown in which protrusions 1254 are provided on the top surface of the first electrode 450 formed of a single layer, but embodiments of the present disclosure are not limited thereto.

[0255] For example, an inorganic film 1258 having a plurality of protrusions 1258a thereon may be provided on the insulating film 440, and the first electrode 450 may be provided on the inorganic film 1258. In this case, the shape of the surface of the first electrode 450 may correspond to the shape of the surface of the inorganic film 1258.

[0256] A plurality of protrusions 1254 including a light-reflective metal or a transparent conductive material may be provided on the insulating film 440. The first electrode 450 may be provided on the plurality of protrusions 1268. The shape of the surface of the first electrode 450 may correspond to the shape of the surface of the plurality of protrusions 1268.

[0257] Although Figure 12 the configuration is shown in which the first electrode 450 is a single layer, embodiments of the present disclosure are not limited thereto, but the first electrode 450 may be formed as a multilayer structure. When the first electrode 450 has a multilayer structure, at least one layer may include a light-reflective metal.

[0258] However, embodiments of the present disclosure are not limited thereto. As Figure 13 shown, the size of the protrusions 1354 provided in the first sub-pixel SP1, the size of the protrusions 1355 provided in the second sub-pixel SP2, and the size of the protrusions 1356 provided in the third sub-pixel SP3 may be different from each other. The size of the protrusions 1356 provided in the third sub-pixel SP3 may correspond to the size of the protrusions 1357 provided in the fourth sub-pixel SP4.

[0259] For example, the size of the protrusions 1354 provided in the first sub-pixel SP1 may be larger than the size of the protrusions 1355 provided in the second sub-pixel SP2, and the size of the protrusions 1355 provided in the second sub-pixel SP2 may be larger than the size of the protrusions 1356 and 1357 provided in the third sub-pixel SP3 and the fourth sub-pixel SP4. However, the above size relationships are merely examples.

[0260] In other words, the sizes of the protrusions in at least two sub-pixels may be different from each other.

[0261] For ease of description, although Figure 13 the example is shown in which the plurality of protrusions provided in one sub-pixel have the same size, the protrusions in one sub-pixel may have different sizes.

[0262] Although Figure 13Configurations are shown in which protrusions in at least two sub-pixels have different sizes, but according to embodiments of the present disclosure, the protrusions in at least two sub-pixels may have different shapes.

[0263] As Figure 13 shown, a plurality of protrusions 1357 provided in at least one sub-pixel SP4 may be spaced apart from each other, and adjacent protrusions 1357 may have different intervals d1 and d2.

[0264] According to embodiments of the present disclosure, at least two sub-pixels may have different protrusion densities. For example, the density of the protrusions 1356 provided in the third sub-pixel SP3 may be greater than the density of the protrusions 1357 provided in the fourth sub-pixel SP4.

[0265] As Figures 14 to 16 shown, at least one sub-pixel may not have protrusions provided on the top surface of the first electrode 450.

[0266] For example, as Figure 14 shown, a plurality of protrusions 1254 may be provided only on the top surface of the first electrode 450 provided in the first sub-pixel SP1, or as Figure 15 shown, a plurality of protrusions 1254 may be provided only on the top surface of the first electrode 450 provided in the first sub-pixel SP1 and the second sub-pixel SP2, or as Figure 16 shown, a plurality of protrusions 1254 may be provided only on the top surface of the first electrode 450 provided in the first to third sub-pixels SP1, SP2, and SP3, but embodiments of the present disclosure are not limited thereto.

[0267] As described above, according to embodiments of the present disclosure, at least one of the size and density (spacing between protrusions) of the protrusions provided on the top surface of the first electrode may be different between at least two sub-pixels emitting different colors of light.

[0268] In other words, according to embodiments of the present disclosure, considering the optical characteristics or element characteristics of the organic light-emitting diodes (OLEDs) provided in each sub-pixel SP1, SP2, SP3, and SP4, protrusions modified in various ways may be provided on the top surface of the first electrode 450.

[0269] According to embodiments of the present disclosure, since the first electrode of the organic light-emitting diode (OLED) is provided on the inclined portion of the recess 443 and at least one protrusion is provided on the top surface of the first electrode, the organic light-emitting display panel and the organic light-emitting display device may have a structure with improved light extraction efficiency.

[0270] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device having a structure capable of preventing color mixing between two adjacent sub-pixels can be provided.

[0271] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device having an increased emission area in an active region can be provided.

[0272] The present disclosure also provides the following configurations.

[0273] 1. An organic light-emitting display panel, the organic light-emitting display panel including an active region having a plurality of sub-pixels, the organic light-emitting display panel comprising:

[0274] A substrate;

[0275] An insulating film disposed on the substrate, and in at least one sub-pixel of the active region, the insulating film includes at least one recess, the at least one recess includes a flat portion and an inclined portion surrounding the flat portion;

[0276] A first electrode, in the at least one sub-pixel region, the first electrode is disposed on a part of the recess and a surrounding portion disposed around the recess, and the first electrode includes at least one protrusion on its surface;

[0277] A bank, the bank includes: a first portion disposed on the first electrode in a region corresponding to a part of the recess; and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion;

[0278] An organic layer overlapping with the recess and disposed on the first electrode, the organic layer has a surface shape corresponding to the shape of the top surface of the first electrode having the protrusion on the first electrode; and

[0279] A second electrode disposed on the organic layer and the bank, the second electrode has a surface shape corresponding to the surface shape of the organic layer in a region overlapping with the organic layer.

[0280] 2. The organic light-emitting display panel according to 1, wherein the first electrode includes a light-reflecting metal.

[0281] 3. The organic light-emitting display panel according to 1, wherein,

[0282] In the at least one sub-pixel region,

[0283] At least one thin film transistor is disposed on the substrate and below the insulating film, wherein,

[0284] The insulating film includes contact holes for exposing the top surfaces of the source electrode or the drain electrode of the thin film transistor, and wherein,

[0285] The first electrode is electrically connected to the source electrode or the drain electrode through the contact hole.

[0286] 4. The organic light emitting display panel according to 3, wherein at least one protrusion is provided on the top surface of the first electrode disposed in the contact hole.

[0287] 5. The organic light emitting display panel according to 1, wherein the protrusion is provided on the entire or partial top surface of the first electrode disposed in a region corresponding to the region where the recess is provided, and wherein,

[0288] The protrusion is provided on the entire top surface of the first electrode disposed in a region corresponding to the region where the surrounding portion is provided.

[0289] 6. The organic light emitting display panel according to 1, wherein no protrusion is provided in a region corresponding to the region where the flat portion is provided, and the protrusion is provided in a region corresponding to the inclined portion where the recess is provided.

[0290] 7. The organic light emitting display panel according to 1, wherein the density of the protrusions provided in a region corresponding to the flat portion where the recess is provided is different from the density of the protrusions provided in a region corresponding to the inclined portion where the recess is provided.

[0291] 8. The organic light emitting display panel according to 1, wherein the organic light emitting display panel includes at least two sub-pixels, wherein,

[0292] The first electrode is disposed in each of the sub-pixels, and wherein,

[0293] At least one of the density and the size of the protrusions provided on the top surface of the first electrode is different between at least two sub-pixels emitting different colors of light.

[0294] 9. The organic light emitting display panel according to 1, wherein each of the sub-pixels includes an emission region, and wherein,

[0295] The emission region of at least one of the plurality of sub-pixels includes a first light emitting portion, in which a first portion of the bank does not overlap with the first electrode in the flat portion of the recess.

[0296] 10. The organic light emitting display panel according to 9, wherein the emission region includes:

[0297] a second light-emitting part surrounding the first light-emitting part, and wherein,

[0298] the second light-emitting part corresponds to a region where the first electrode overlaps with the inclined part of the recess.

[0299] 11. The organic light-emitting display panel according to 10, wherein color coordinates of the first light-emitting part are different from color coordinates of the second light-emitting part.

[0300] 12. The organic light-emitting display panel according to 10, wherein a first non-light-emitting part is disposed between the first light-emitting part and the second light-emitting part.

[0301] 13. The organic light-emitting display panel according to 12, wherein the first non-light-emitting part is smaller in size than the first light-emitting part and the second light-emitting part.

[0302] 14. The organic light-emitting display panel according to 12, wherein the first non-light-emitting part corresponds to a region where the first part of the bank overlaps with the flat part of the recess.

[0303] 15. The organic light-emitting display panel according to 10, further comprising a second non-light-emitting part surrounding the second light-emitting part.

[0304] 16. The organic light-emitting display panel according to 15, wherein the second non-light-emitting part corresponds to a region where the second part of the bank is provided.

[0305] 17. The organic light-emitting display panel according to 9, wherein the second light-emitting part provided in at least one of the plurality of emission regions includes: a region where the first electrode overlaps with the inclined part of the recess to a region where the first electrode is disposed on at least one side surface of the contact hole of the insulating film.

[0306] 18. The organic light-emitting display panel according to 17, wherein as a distance from the region where the first electrode overlaps with the inclined part of the recess increases, brightness of the second light-emitting part decreases.

[0307] 19. The organic light-emitting display panel according to 1, wherein the first electrode provided in the at least one sub-pixel does not include the protrusion.

[0308] 20. The organic light-emitting display panel according to 1, wherein the organic light-emitting display panel further comprises an auxiliary electrode disposed under the insulating film, and the second electrode is in contact with the auxiliary electrode through a hole formed in the insulating film and the bank for exposing the auxiliary electrode.

[0309] 21. An organic light emitting display device, the organic light emitting display device including an active area having a plurality of sub-pixels, the organic light emitting display device comprising:

[0310] A substrate;

[0311] An insulating film disposed on the substrate, and in at least one sub-pixel area, the insulating film including at least one recess, the at least one recess including a flat portion and an inclined portion surrounding the flat portion;

[0312] A first electrode, in the at least one sub-pixel area, the first electrode being disposed on a part of the recess and a surrounding portion disposed around the recess, the first electrode including at least one protrusion on its surface;

[0313] A bank, the bank including a first part positioned on a part of the recess and a second part positioned on the surrounding portion;

[0314] An organic layer overlapping with the recess and disposed on the first electrode, the organic layer having a surface shape corresponding to the shape of the top surface of the first electrode having the protrusion on the first electrode; and

[0315] A second electrode, the second electrode having a surface shape corresponding to the surface shape of the organic layer in a region overlapping with the organic layer, wherein,

[0316] In a region where the flat portion is provided, a region where the first electrode does not overlap with the bank is a first light emitting portion, wherein,

[0317] In a region where the flat portion is provided, a region where the bank overlaps with the first electrode is a first non-light emitting portion, and wherein,

[0318] A region corresponding to the inclined portion is a second light emitting portion.

[0319] 22. The organic light emitting display device according to 21, wherein the second light emitting portion of the at least one sub-pixel includes: a region where the first electrode overlaps with the inclined portion of the recess until a region where the first electrode is disposed on at least one side surface of a contact hole of the insulating film.

[0320] 23. The organic light emitting display device according to 21, further including a second non-light emitting portion surrounding the second light emitting portion.

[0321] 24. An organic light emitting display panel, the organic light emitting display panel including an active area having a plurality of sub-pixels, the organic light emitting display panel comprising:

[0322] Substrate;

[0323] An insulating film disposed on the substrate, and in at least one sub-pixel of the active region, the insulating film includes at least one recess, and the at least one recess includes a flat portion and an inclined portion surrounding the flat portion;

[0324] A first electrode, in the at least one sub-pixel region, the first electrode is disposed on a part of the recess and a surrounding portion disposed around the recess, and the first electrode includes at least one protrusion on its surface;

[0325] A bank, the bank includes: a first portion disposed on the first electrode in a region corresponding to a part of the recess; and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; and

[0326] An organic layer overlapping with the recess and disposed on the first electrode,

[0327] Wherein, the height of the inclined portion is greater than or equal to the height of the second portion of the bank.

[0328] The above description has been given so that any person skilled in the art can make and use the technical concept of the present disclosure, and the above description has been provided in the context of a specific application and its requirements. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art, and without departing from the spirit and scope of the present disclosure, the general principles defined herein can be applied to other embodiments and applications. The above description and the accompanying drawings provide examples of the technical concept of the present disclosure only for illustrative purposes. That is, the disclosed embodiments are intended to illustrate the scope of the technical concept of the present disclosure. Therefore, the scope of the present disclosure is not limited to the disclosed embodiments, but is given the broadest scope consistent with the claims. The protection scope of the present disclosure should be interpreted based on the appended claims, and all technical concepts within the equivalent scope thereof should be interpreted as being included within the scope of the present disclosure.

[0329] Description of Reference Numerals

[0330] 440: Insulating film

[0331] 441: Flat portion

[0332] 442: Inclined portion

[0333] 443: Recess

[0334] 444: Surrounding portion

[0335] 450: First electrode

[0336] 454: Protrusion

[0337] 460: Organic layer

[0338] 470: Second electrode

Claims

1. A display panel, include: a substrate including an active region and an inactive region; a transistor disposed on the substrate; An insulating film provided on the transistor, the insulating film including at least one recess; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulating film, The sub-pixel includes at least two light-emitting portions and at least one non-light-emitting portion, and the at least one non-light-emitting portion is arranged between the at least two light-emitting portions, and The surface of the organic light emitting diode includes at least one protrusion located in at least one light emitting portion of the at least two light emitting portions.

2. The display panel according to claim 1, in, The at least two light emitting portions of the sub-pixel include a first light emitting portion and a second light emitting portion, and the second light emitting portion surrounds the first light emitting portion.

3. The display panel according to claim 1, in, The area of ​​the at least one non-light emitting portion is smaller than the area of ​​each of the at least two light emitting portions.

4. The display panel according to claim 2, in, The at least two light emitting portions and the at least one non-light emitting portion each have a circular, elliptical, polygonal, triangular, square, hexagonal or octagonal shape.

5. The display panel according to claim 2, in, The sub-pixel includes a first non-light emitting portion and a second non-light emitting portion, and the second non-light emitting portion surrounds the second light emitting portion.

6. The display panel according to claim 5, in, The first non-light emitting portion is separated from the second non-light emitting portion by the second light emitting portion.

7. The display panel according to claim 6, in, The second light emitting portion includes an inclined portion of the insulating film.

8. The display panel according to claim 1, in, The insulating film further includes a surrounding portion surrounding the at least one recess and a contact hole spaced apart from the at least one recess.

9. The display panel according to claim 1, in, The organic light emitting diode includes a first electrode, an organic layer, and a second electrode disposed on the insulating film.

10. The display panel according to claim 9, in, In the at least two light emitting portions, the first electrode includes at least one protrusion on a surface thereof.

11. The display panel according to claim 1, further comprising: include: a second transistor disposed on the substrate; as well as a second sub-pixel electrically connected to the second transistor, the second sub-pixel comprising a first electrode, an organic layer, and a second electrode, The second sub-pixel includes at least two light-emitting portions and at least one non-light-emitting portion, and the at least one non-light-emitting portion of the second sub-pixel separates the at least two light-emitting portions of the second sub-pixel from each other. wherein a surface of the first electrode of the second sub-pixel includes at least one protrusion located in one or more of the at least two light-emitting portions of the second sub-pixel, and The density or size of the at least one protrusion in the second sub-pixel is different from the density or size of the at least one protrusion in the first sub-pixel.

12. The display panel according to claim 7, in, The at least one protrusion is located in a region corresponding to the inclined portion of the at least one recess.

13. The display panel according to claim 10, in, The at least one protrusion of the first electrode is disposed in a contact hole of the insulating film.

14. The display panel according to claim 7, in, The at least one recess includes a flat portion, and wherein the inclined portion surrounds the flat portion.

15. The display panel according to claim 14, in, The density of the at least one protrusion provided in a region corresponding to a region where the flat portion of the at least one recess is provided is different from the density of the at least one protrusion provided in a region corresponding to a region where the inclined portion of the at least one recess is provided.

16. The display panel according to claim 9, in, The first electrode is formed of a single layer or a multi-layer structure, and the multi-layer structure includes at least one light-reflective metal.

17. The display panel according to claim 9, in, The first electrode has a flat lower surface and an upper surface with protrusions.

18. A display panel, include: a substrate including an active region and an inactive region; a transistor disposed on the substrate; An insulating film provided on the transistor, the insulating film including at least one recess; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulating film, The sub-pixel includes at least two light-emitting portions and at least one non-light-emitting portion, and the at least one non-light-emitting portion is arranged between the at least two light-emitting portions, and Wherein, the surface of the organic light emitting diode includes at least one protrusion located in the at least one non-light emitting portion.

19. A display panel, include: a substrate including an active region and an inactive region; a transistor disposed on the substrate; An insulating film provided on the transistor, the insulating film including at least an inclined portion and a flat portion; and a sub-pixel electrically connected to the transistor, the sub-pixel including an organic light emitting diode disposed on the insulating film, The organic light emitting diode comprises a first electrode, an organic layer and a second electrode arranged on the insulating film. The surface of the organic light emitting diode includes at least one protrusion located on a top surface of the first electrode in a region corresponding to the inclined portion.

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