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

Abstract

Embodiments of the present disclosure relate to an organic light-emitting display panel and an organic light-emitting display device including the panel, and more specifically, to an organic light-emitting display panel and an organic light-emitting display device, which include: an insulating film, in at least one sub-pixel of an active area, 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; and a first electrode of an organic light-emitting diode, in at least one sub-pixel area, the first electrode of the organic light-emitting diode is arranged on the recess and a portion of a surrounding portion arranged around the recess, and the first electrode includes at least one protrusion on its surface; thereby improving light extraction efficiency.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2019-0115803, filed on September 20, 2019, which is hereby incorporated by reference for all purposes as if fully set forth herein. Technical Field

[0003] Various embodiments of the present disclosure relate to an organic light emitting display panel and an organic light emitting display device including the same. Background Art

[0004] Regarding display devices or lighting devices, the development of smart society has led to an increase in 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, thus gaining popularity.

[0005] The organic light emitting display panel includes an organic layer for emitting light. A portion of the light emitted from the organic layer may be captured 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

[0006] Embodiments of the present disclosure are directed to providing an organic light emitting display panel and an organic light emitting display device having a structure with improved light extraction efficiency.

[0007] Embodiments of the present disclosure are also directed to providing 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.

[0008] Embodiments of the present disclosure are also directed to providing an organic light emitting display panel and an organic light emitting display device having an increased emission area in an active area.

[0009] According to an embodiment of the present disclosure, an organic light-emitting display panel can be provided, which includes an active area with multiple sub-pixels, and the organic light-emitting display panel includes: a substrate; an insulating film arranged on the substrate, and in at least one sub-pixel in the active area, 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 area, the first electrode is arranged on a portion of the recess and a surrounding portion arranged around the recess, and the first electrode includes at least one protrusion on its surface; a dam, including: a first portion arranged on the first electrode in an area corresponding to the portion of the recess and a second portion arranged on the insulating film and the first electrode in an area corresponding to the surrounding portion; an organic layer overlapping the recess and arranged 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 a second electrode arranged on the organic layer and the dam, the second electrode having a surface shape corresponding to the surface shape of the organic layer in an area overlapping with the organic layer.

[0010] According to an embodiment of the present disclosure, an organic light-emitting display device may be provided, the organic light-emitting display device including an active area having a plurality of sub-pixels, the organic light-emitting display device including: an insulating film disposed on a substrate, and in at least one sub-pixel region, 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; a first electrode, in at least one sub-pixel region, the first electrode being disposed on a portion of the recess and a surrounding portion disposed around the recess, the first electrode including at least one protrusion on its surface; a dam, the dam including a first portion positioned on a portion 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 a shape of a top surface of the first electrode having the protrusion on the first electrode; and a second electrode, the second electrode having a surface shape corresponding to a surface shape of the organic layer in a region overlapping the organic layer, wherein, in a region where the flat portion is disposed, a region where the first electrode does not overlap with the dam is a first light-emitting portion, wherein, in a region where the flat portion is disposed, a region where the dam overlaps with the first electrode is a first non-light-emitting portion, and wherein a region corresponding to the inclined portion is a second light-emitting portion.

[0011] According to an embodiment of the present disclosure, an organic light-emitting display panel can be provided, which includes an active area with multiple sub-pixels, and the organic light-emitting display panel includes: a substrate; an insulating film arranged on the substrate, and in at least one sub-pixel of the active area, 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 area, the first electrode is arranged on a portion of the recess and a surrounding portion arranged around the recess, and the first electrode includes at least one protrusion on its surface; a dam, the dam including: a first portion arranged on the first electrode in an area corresponding to a portion of the recess; and a second portion arranged on the insulating film and the first electrode in an area corresponding to the surrounding portion; and an organic layer overlapping the recess and arranged 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 dam.

[0012] 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.

[0013] 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.

[0014] 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 area may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] 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;

[0017] Figure 2 is a diagram showing an example 3T (transistor) 1C (capacitor) structure in which one subpixel further includes a second transistor electrically connected between a second node of the drive transistor and a reference voltage line;

[0018] 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;

[0019] Figure 4is shown along Figure 3 A cross-sectional view of a region cut by line AB and a portion of a pad region;

[0020] Figure 5 is a diagram showing an arrangement of a plurality of protrusions on a top surface of a first electrode;

[0021] Figure 6 It is shown Figure 4 An enlarged view of region X;

[0022] Figure 7 It is shown Figure 4 An enlarged view of region Y;

[0023] Figure 8 It is shown Figure 4 A magnified view of region Z;

[0024] Fig. 9 is a graph showing light extraction efficiency and contrast ratio (automatically adjusted by light radiated from the outside) depending on a 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;

[0025] Fig.10 is a cross-sectional view showing an organic light emitting display device according to another embodiment of the present disclosure;

[0026] Fig.11 is a cross-sectional view showing an organic light emitting display device according to still another embodiment of the present disclosure; and

[0027] Fig.12 , Fig.13 , Fig.14 , Fig.15 and Fig.16 is a diagram showing a protrusion on the top surface of the first electrode in one pixel. DETAILED DESCRIPTION

[0028] 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 shown by way of illustration, and in the accompanying drawings, the same reference numerals and symbols may be used to represent the same or similar parts, even when these parts are shown in different drawings from each other. In addition, 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, the detailed description of the well-known functions and parts incorporated herein will be omitted. Terms such as "including", "having", "comprising", "consisting of", "consisting of", and "formed of" used herein are generally intended to allow the addition of other parts, 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.

[0029] Terms such as "first", "second", "A", "B", "(A)" or "(B)" may be used herein 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.

[0030] When it is mentioned that a first element is “connected or coupled to” a second element, “contacts or overlaps” the second element, etc., it should be interpreted that not only the first element may be “directly connected or coupled to” the second element or “directly contact or overlaps” the second element, but also a third element may be “interposed” between the first and second elements, or the first and second elements may be “connected or coupled to” each other via a fourth element, “contacts or overlaps” each other via a fourth element, etc. Here, the second element may be included in at least one of the two or more elements that are “connected or coupled to”, “contacts or overlaps”, etc., each other.

[0031] When time relative terms such as "after", "subsequently", "next", "before", etc. are used to describe a process or operation of an element or configuration, or a flow or step in an operation, processing, or manufacturing method, unless used with the terms "directly" or "immediately", these terms can be used to describe non-continuous or non-sequential processes or operations.

[0032] In addition, when referring to any size, relative dimension, etc., it should be considered that the numerical value or corresponding information (e.g., level, range, etc.) of an element or feature includes a tolerance or error range that may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.), even if the relevant description is not specifically stated. In addition, the term "may" fully encompasses all meanings of the term "may".

[0033] Hereinafter, embodiments of the present disclosure are described in detail with reference to the accompanying drawings.

[0034] Figure 1 is a diagram schematically illustrating a system configuration of an organic light emitting display device according to an embodiment of the present disclosure.

[0035] 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.

[0036] 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.

[0037] In the panel PNL, a plurality of data lines DL and a plurality of gate lines GL may be arranged to cross each other. For example, a plurality of gate lines GL may be arranged in rows or columns, and a plurality of data lines DL may be arranged in columns or rows. For ease of description, it is assumed below that a plurality of gate lines GL are arranged in rows, and a plurality of data lines DL are arranged in columns.

[0038] The panel PNL may have other kinds of signal lines as well as a plurality of data lines DL and a plurality of gate lines GL according to, for example, a sub-pixel structure. The panel PNL may also have a driving voltage line, a reference voltage line, or a common voltage line.

[0039] The kind of the signal line disposed on the panel PNL may vary according to, for example, a sub-pixel structure or a panel type. In the present disclosure, the concept of a signal line may include an electrode to which a signal is applied.

[0040] The panel PNL may include an active area A / A for displaying a picture or an image 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 called a bezel area.

[0041] The active area A / A includes a plurality of sub-pixels SP for displaying an image.

[0042] The non-active area N / A has a pad area for electrically connecting to the data driver DDR, and may have a plurality of data link lines for connecting the pad area with the plurality of data lines DL. The plurality of data link lines may be extensions of the plurality of data lines DL to the non-active area N / A, or may be separate patterns electrically connected to the plurality of data lines DL.

[0043] The non-active area N / A may also include lines related to gate driving to transmit the voltage (signal) required for gate driving to the gate driver GDR through a pad electrically connected to the data driver DDR. For example, the lines related to gate driving may include a clock line for transmitting a clock signal, a gate voltage line for transmitting gate voltages VGH and VGL, and a gate driving control signal line for transmitting various control signals required to generate a scan signal. Unlike the gate lines GL arranged in the active area A / A, the lines related to gate driving are arranged in the non-active area N / A.

[0044] The driving circuit may 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.

[0045] The data driver DDR may drive the plurality of data lines DL by outputting data voltages to the plurality of data lines DL.

[0046] The gate driver GDR may drive the plurality of gate lines GL by outputting scan signals to the plurality of gate lines GL.

[0047] The controller CTR may 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 may supply the image data DATA to the data driver DDR.

[0048] The controller CTR starts scanning according to the timing achieved in each frame, converts input image data input from the outside into image data DATA suitable for a data signal format used in the data driver DDR, outputs the image data DATA, and controls data driving at an appropriate time suitable for scanning.

[0049] In order 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.

[0050] As an example, in order 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).

[0051] In order 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).

[0052] The controller CTR may be a timing controller used in typical display technology, or a control device that may perform other control functions as well as the function of the timing controller.

[0053] The controller CTR may be implemented as a separate component from the data driver DDR, or the controller CTR and the data driver DDR may be implemented as an integrated circuit together.

[0054] The data driver DDR receives the image data DATA from the controller CTR and supplies a data voltage to the 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.

[0055] The data driver DDR may exchange various signals with the controller CTR via various interfaces.

[0056] The gate driver GDR sequentially drives the 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.

[0057] The gate driver GDR sequentially supplies a scan signal of a turn-on voltage or a turn-off voltage to the plurality of gate lines GL under the control of the controller CTR.

[0058] When a specific gate line is turned on 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.

[0059] The data driver DDR may be positioned 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, a driving scheme or panel design, the data driver DDR may be positioned on each of two opposite sides (e.g., both the top side and the bottom side) of the panel PNL.

[0060] The gate driver GDR can be positioned on only one side (e.g., the left or right side) of the panel PNL, and in some cases, depending on, for example, a driving scheme or panel design, the gate driver GDR can be positioned on each of two opposite sides (e.g., both the left and right sides) of the panel PNL.

[0061] The data driver DDR may include one or more source driver integrated circuits (SDICs).

[0062] 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 also include one or more analog-to-digital converters ADC.

[0063] Each source driver integrated circuit (SDIC) can be connected to the bonding pad of the panel PNL in a tape automated bonding (TAB) type or a chip on glass (COG) type, or can be directly set on the panel PNL. In some cases, each source driver integrated circuit (SDIC) can be integrated and set on the panel PNL. Each source driver integrated circuit (SDIC) can be implemented in a chip on film (COF) type. In this case, each source driver integrated circuit (SDIC) can be mounted on a circuit film and electrically connected to the data line DL of the panel PNL through the circuit film.

[0064] The gate driver GDR may include a plurality of gate driving circuits GDC, and the plurality of gate driving circuits may correspond to the plurality of gate lines GL, respectively.

[0065] Each gate driving circuit GDC may include, for example, a shift register and a level shifter.

[0066] Each gate drive circuit GDC can be connected to the bonding pad of the panel PNL in a tape automated bonding (TAB) type or a chip on glass (COG) type. Each gate drive circuit GDC can be implemented in a chip on film (COF) solution. In this case, each gate drive circuit GDC can be mounted on a circuit film and electrically connected to the gate line GL of the panel PNL through the circuit film. Each gate drive circuit GDC can be implemented in a gate in panel (GIP) type and embedded in the panel PNL. In other words, each gate drive circuit GDC can be directly formed on the panel PNL.

[0067] Figure 2 is a diagram showing an example 3T (transistor) 1C (capacitor) structure in which a subpixel also includes a second transistor electrically connected between the second node of the driving transistor and the reference voltage line.

[0068] Reference Figure 2 The second transistor T2 may be electrically connected between the second node N2 of the driving transistor DRT and the reference voltage line RVL, and receive the second scan signal SCAN2 through a gate node to control turning on / off thereof.

[0069] An anode electrode (also referred to as a pixel electrode) of the organic light emitting diode OLED may be electrically connected to the second node N2 of the driving transistor DRT. A cathode electrode (also referred to as a common electrode) of the organic light emitting diode OLED may have a base voltage EVSS applied thereto.

[0070] 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 the second node N2 of the driving transistor DRT.

[0071] The second transistor T2 may be turned on, for example, in a display driving period, and may be turned on in a sensing driving period for sensing a characteristic value of the driving transistor DRT or a characteristic value of an organic light emitting diode (OLED).

[0072] In synchronization with relevant driving timing (eg, display driving timing or initialization timing in a sensing driving period), the second transistor T2 may be turned on by a second scan signal SCAN2 to transmit the reference voltage Vref supplied to the reference voltage line RVL to the second node N2 of the driving transistor DRT.

[0073] In synchronization with the relevant driving timing (eg, sampling timing in the sensing driving period), the second transistor T2 may be turned on by the second scan signal SCAN2 to transmit the voltage of the second node N2 of the driving transistor DRT to the reference voltage line RVL.

[0074] In other words, the second transistor T2 may control a voltage state of the second node N2 of the driving transistor DRT or transmit a voltage of the second node N2 of the driving transistor DRT to the reference voltage line RVL.

[0075] The reference voltage line RVL may be electrically connected to an analog-to-digital converter that senses a voltage of the reference voltage line RVL, converts the voltage into a digital value, and outputs sensing data including the digital value.

[0076] The analog-to-digital converter may be included in a source driver integrated circuit (SDIC) implementing a data driver DDR.

[0077] The sensing data output from the analog-to-digital converter may be used to sense a characteristic value (eg, threshold voltage or mobility) of the driving transistor DRT or a characteristic value (eg, threshold voltage) of an organic light emitting display diode (OLED).

[0078] The capacitor Cst may be an external capacitor intentionally designed to be outside the driving transistor DRT, rather than a parasitic capacitor (eg, Cgs or Cgd) that is an internal capacitor existing between the first node N1 and the second node N2 of the driving transistor DRT.

[0079] The third node N3 of the driving transistor DRT may be a drain node or a source node to which the driving voltage EVDD may be applied. The third node N3 may be electrically connected to a driving voltage line DVL through which the driving voltage EVDD is provided.

[0080] The storage capacitor Cst may 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 an image signal voltage or a voltage corresponding to the data voltage Vdata during a single frame time (or a predetermined time).

[0081] Each of the driving transistor DRT, the first transistor T1, and the second transistor T2 may be an n-type transistor or a p-type transistor.

[0082] The first scan signal SCAN1 and the second scan signal SCAN2 may be separate gate signals. In this case, the first scan signal SCAN1 and the second scan signal SCAN2 may be applied to the gate node of the first transistor T1 and the gate node of the second transistor T2, respectively, through different gate lines.

[0083] 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 node of the first transistor T1 and the gate node of the second transistor T2 through the same gate line.

[0084] Figure 2 Each sub-pixel structure shown in 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.

[0085] The plurality of sub-pixels may have the same structure, or some of the plurality of sub-pixels may have different structures.

[0086] The brightness of the panel PNL may vary according to the amount of light emitted from the organic light emitting diode (OLED) arranged 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 a thin film transistor array film having a structure with improved light extraction is described below.

[0087] At least one sub-pixel among the plurality of sub-pixels disposed in the active region may include at least one recess in the insulating film.

[0088] The organic light emitting display panel is described in more detail below with reference to various drawings.

[0089] Figure 3 is a plan view illustrating 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. Figure 4 is shown along Figure 3 A cross-sectional view of a region cut off by line AB and a portion of a pad region. Figure 4 Only a partial configuration provided in one sub-pixel SP and a partial region, for example, a partial configuration provided in a pad region and a partial region may be shown.

[0090] Reference 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.

[0091] like Figure 3 As shown, the light emitting parts EA of at least two or more sub-pixels SP may have different sizes, but embodiments of the present disclosure are not limited thereto.

[0092] Each of the sub-pixels SP disposed in the active area A / A may include a plurality of light emitting parts EA1 and EA2 .

[0093] Specifically, one 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 .

[0094] The first non-light emitting portion NEA1 may be provided between the first light emitting portion EA1 and the second light emitting portion EA2.

[0095] In other words, the first light emitting part EA1 and the second light emitting part EA2 may be distinguished from each other by the first non-light emitting part NEA1.

[0096] The first non-light emitting part NEA1 may be smaller in size than the first light emitting part EA1 and the second light emitting part EA2.

[0097] The first non-luminescent portion NEA1 may be in a black state when the display device is in an on state, or may have a lower brightness than the first and second luminescent portions EA1 and EA2 due to light incident from at least one of the first and second luminescent portions EA1 and EA2.

[0098] like Figure 3As 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, the 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 as a circle, an ellipse or a polygon such as a triangle, a square or a hexagon, or a combination thereof.

[0099] A pair of first and second light emitting parts EA1 and EA2 may be spaced apart from another pair of first and second light emitting parts EA1 and EA2, and a second non-light emitting part NEA2 may be provided between the pair of first and second light emitting parts EA1 and EA2 and another pair of first and second light emitting parts EA1 and EA2.

[0100] The second non-light emitting portion NEA2 may be a region entirely or partially corresponding to a circuit region in which a circuit for driving the first light emitting portion EA1 and the second light emitting portion EA2 is disposed.

[0101] When the display device is in the on state, the second non-light emitting part NEA2 may be in a black state or may have a lower brightness than the first and second light emitting parts EA1 and EA2 due to light incident from the second light emitting part EA2.

[0102] When the first and second non-emission parts NEA1 and NEA2 have lower brightness than the first and second emission parts EA1 and EA2, the brightness of the first non-emission part NEA1 may be higher than that of the second non-emission part NEA2, but the embodiments of the present disclosure are not limited thereto.

[0103] Reference Figure 4 In the active area A / A (the area cut along the line AB), there are provided: a transistor TR provided on the substrate 410 and an organic light emitting diode (OLED) electrically connected to the transistor TR. In the non-active area N / A, there is at least one pad area.

[0104] The transistor TR includes an active layer 421 , a gate electrode 423 , a source electrode 424 , and a drain electrode 425 .

[0105] 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 embodiments of the present disclosure are not limited thereto.

[0106] Specifically, a buffer layer 411 is provided on the substrate 410. An active layer 421 of the transistor TR is provided on the buffer layer 411. A gate insulating film 422 is provided on the active layer 421, and a gate electrode 423 is provided on the gate insulating film 422.

[0107] Although in Figure 4 Although not shown, according to an embodiment of the present disclosure, the active layer 421 may include a channel region, and the channel region of the active layer 421 may overlap 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.

[0108] An interlayer insulating film 412 is disposed on the gate electrode 423. A source electrode 424 and a 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. The source electrode 424 and the drain electrode 425 may each contact the active layer 421 through a hole formed in the interlayer insulating film 412.

[0109] Although the transistor TR may be disposed on the substrate 410 in the above structure, the transistor structure of the present disclosure is not limited thereto.

[0110] 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 one end of the active layer 421 , and the drain electrode 425 may be disposed on the active layer 421 to overlap an opposite end of the active layer 421 .

[0111] A protective film 413 may be provided while covering the transistor TR.

[0112] An insulating film 440 may be provided on the protective film 413 .

[0113] The insulating film 440 may be formed of an organic material, but embodiments of the present disclosure are not limited thereto.

[0114] In one sub-pixel region, the insulating film 440 may have at least one concave portion 443. The insulating film 440 may have a surrounding portion 444 surrounding the concave portion 443 and positioned around the concave portion 443. The concave portion 443 may include a flat portion 441 and an inclined portion 442 surrounding the flat portion 441.

[0115] 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.

[0116] The insulating film 440 may have a contact hole CH spaced apart from the recess 443 .

[0117] In at least one sub-pixel region, the first electrode 450 may be disposed on the concave portion 443 and the surrounding portion 444 of the insulating film 440 .

[0118] In the region overlapping with the recessed portion 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.

[0119] 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 .

[0120] Specifically, the first electrode 450 may be electrically connected to the source electrode 424 or the drain electrode 425 of the transistor TR.

[0121] At least one protrusion 454 may be disposed on a top surface of the first electrode 450 of the organic light emitting diode (OLED).

[0122] For example, Figure 4 As shown, protrusions 454 may 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 .

[0123] Alternatively, the protrusion 454 may be provided in the entire region corresponding to the region where the recess 443 of the insulating film 440 is provided, or in the entire region corresponding to the region where the surrounding portion 444 of the insulating film 440 is provided. In this case, the protrusion 454 may also be provided on the top surface of the first electrode 450 provided in the contact hole CH.

[0124] At least one protrusion 454 may be formed integrally with the first electrode 450 . However, embodiments of the present disclosure are not limited thereto. For example, a boundary may exist between the at least one protrusion 454 and the first electrode 450 .

[0125] When a plurality of protrusions 454 are provided on the top surface of the first electrode 450, some of the protrusions 454 may be spaced apart from each other or positioned adjacent to each other. The plurality of protrusions 454 may be provided at regular intervals (including a case where the interval is 0), in regular sizes or shapes, or may be provided at different intervals or in different sizes or shapes.

[0126] Refer to the following Figure 5 The arrangement of the plurality of protrusions 454 is described in detail.

[0127] Figure 5 is a diagram showing an arrangement of a plurality of protrusions on a top surface of a first electrode.

[0128] Reference Figure 5 , a plurality of protrusions 454 may be arranged along a plurality of rows and a plurality of columns. For example, a plurality of protrusions 454 may be arranged in a matrix form. At least two of the protrusions arranged in the same row or the same column may be positioned adjacent to each other, but embodiments of the present disclosure are not limited thereto.

[0129] The plurality of protrusions 454 may be irregularly arranged on the top surface of the first electrode 450. In this case, the plurality of protrusions 454 may have irregular sizes and shapes, but the embodiments of the present disclosure are not limited thereto. For example, the plurality of protrusions 454 may have regular sizes or regular shapes.

[0130] Each of the plurality of protrusions 454 may be formed in various shapes, such as a hemispherical shape, a hemispherical body, or a polyhedron. On the other hand, the cross section of the protrusion 454 may be formed in various shapes, such as a circular shape, an elliptical shape, or a polygonal shape.

[0131] The plurality of protrusions 454 may be integrally formed with the first electrode 450, such as Figure 4 As shown, or the plurality of protrusions 454 may be separated from the first electrode 450, as shown Figure 5 shown.

[0132] The plurality of protrusions 454 and the first electrode 450 may include materials corresponding to each other or may include different materials.

[0133] like Figure 4 As shown, a bank 480 may be provided on the insulating film 440 and a portion of the first electrode 450 .

[0134] The embankment 480 may include: a first portion 481 disposed on the first electrode 450 in an area corresponding to a portion of the recess 443 disposed in the insulating film 440; and a second portion 482 disposed on the insulating film 440 and the first electrode 450 in an area corresponding to the surrounding portion 444 disposed in the insulating film 440.

[0135] The bank 480 may be provided to expose a portion of the top surface of the first electrode 450 in a region overlapping the recess 443. In other words, at least one sub-pixel may have a region in which the first electrode 450 and the bank 480 do not overlap.

[0136] The organic layer 460 having the emission layer may be disposed on the first electrode 450 not overlapping the bank 480. The organic layer 460 may be disposed on the top surface of the first electrode 450 not overlapping the bank 480.

[0137] The organic layer 460 may have a surface shape corresponding to the shape of the top surface of the first electrode 450 having at least one protrusion 454. That is, the surface shape of the organic layer 460 may have a surface shape formed along the shape of the protrusion 454 disposed on the top surface of the first electrode 450.

[0138] The second electrode 470 may be disposed to cover both the organic layer 460 and the bank 480 .

[0139] The second electrode 470 may have a surface shape corresponding to the surface shape of the organic layer 460 in a region overlapping the organic layer 460. That is, the second electrode 470 may also have a surface shape formed along the shape of the protrusion 454.

[0140] 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.

[0141] Formed by this method, the organic layer 460 may have a first thickness in a region having a predetermined angle with a horizontal surface and a second thickness in a region parallel to the horizontal surface, wherein the first thickness is smaller than the second thickness.

[0142] For example, the thickness of the organic layer 460 disposed in the region corresponding to the inclined portion 442 of the recess 443 may be smaller than the thickness of the organic layer 460 disposed on the top surface of the first electrode 450 exposed by the bank 480. In addition, the thickness of the organic layer 460 disposed in the region corresponding to the inclined portion 442 of the recess 443 may be smaller than the thickness of the organic layer 460 disposed on the surrounding portion 444 of the insulating film 440.

[0143] Therefore, when driving the organic light emitting diode (OLED), the area where the thickness of the organic layer 460 is relatively small, i.e., the area corresponding to the inclined portion 442 of the recess 443, can have the highest current density, and a strong electric field can be applied to the area corresponding to the inclined portion 442 of the recess 443.

[0144] The light emitting characteristics of the organic light emitting diode (OLED) in the region corresponding to the inclined portion 442 of the recess 443 may be different from the light emitting characteristics of the organic light emitting diode (OLED) in the region corresponding to the flat portion 441 of the recess 443, and the OLED may be degraded.

[0145] According to an embodiment of the present disclosure, since the bank 480 is provided to cover the inclined portion 442 of the recess 443 , the OLED can be prevented from being degraded in the region corresponding to the inclined portion 442 of the recess 443 , and the phenomenon that the light emission characteristics show different characteristics in each region can be prevented.

[0146] 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.

[0147] Meanwhile, the first electrode 450 may include a light reflective metal. Figure 4 A configuration in which the first electrode 450 is a single layer is shown, but embodiments of the present disclosure are not limited thereto, and the first electrode 450 may be formed in a multi-layer structure. When the first electrode 450 has a multi-layer structure, at least one layer may include a light reflective metal.

[0148] 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 an aluminum alloy.

[0149] The second electrode 470 may include a light-transmitting or semi-light-transmitting 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-transmitting metal such as magnesium, silver (Ag), or an alloy of magnesium and silver. When the source electrode 424 includes a semi-light-transmitting metal, the thickness of the source electrode 424 may be less than the thickness of the first electrode 450.

[0150] 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.

[0151] The first electrode 450 may be provided to cover both the flat portion 441 and the inclined portion 442 of the concave portion 443 of the insulating film 440 .

[0152] Therefore, a portion of 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.

[0153] Another portion of the light emitted from the organic layer 460 may be guided to the first electrode 450, i.e., a first portion 451 of the first electrode 450 disposed in a position corresponding to the flat portion 441, and reflected by the first electrode 450 or rerouted to the source electrode 424 through at least one protrusion 454 disposed on the top surface of the first portion 451, and finally extracted to the outside of the panel PNL.

[0154] The at least one protrusion 454 may allow light, which is reflected by the first electrode 450 and thus cannot be extracted to the outside, to be extracted to the outside.

[0155] Specifically, the surface forming the protrusion 454 on the top surface of the first electrode 450 may have a predetermined slope with respect to the extension direction of the top surface of the first electrode 450. When the incident angle of light to the inclined surface forming the protrusion 454 is within the critical angle, multiple reflections are enabled, so that light extraction efficiency can be improved.

[0156] As such, the at least one protrusion 454 increases the amount of light extracted to the outside, thereby reducing light trapped in the organic light emitting diode (OLED).

[0157] Yet another portion 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 disposed in a region corresponding to the inclined portion 442 , and extracted to the outside of the panel PNL.

[0158] Light that is not rerouted by the protrusion 454 disposed on the inclined portion 442 may pass through the first protrusion 454 and be reflected by the first electrode 450 including the light reflective metal and extracted to the outside of the panel PNL.

[0159] As described above, placing the first electrode 450 of the organic light emitting diode (OLED) on the inclined portion 442 of the concave portion 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.

[0160] like Figure 4 As shown, an auxiliary electrode AE ​​(which may also be referred to as an auxiliary line) contacting the second electrode 470 may be further provided in a region corresponding to the second non-light emitting portion NEA2 in the active region A / A.

[0161] Specifically, the auxiliary electrode 430 may be disposed on the interlayer insulating film 412. The protective film 413, the insulating film 440, and the bank 480 may have a hole for exposing the auxiliary electrode 430. The second electrode 470 may contact the auxiliary electrode 430 through the hole formed in the protective film 413, the insulating film 440, and the bank 480 for exposing the auxiliary electrode 430.

[0162] 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.

[0163] Although Figure 4 A configuration is shown in which one auxiliary electrode 430 is provided in each sub-pixel SP, but the embodiments of the present disclosure are not limited thereto. For example, one auxiliary electrode 430 may be provided per a plurality of sub-pixels SP.

[0164] Unless the organic light emitting display panel according to an embodiment of the present disclosure is a large-sized panel, the auxiliary electrode 430 may be omitted.

[0165] like Figure 4 As shown, a storage capacitor Cst may be provided in the active region A / A. The storage capacitor Cst may 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.

[0166] According to an embodiment of the present disclosure, the organic light emitting display panel includes a pad region disposed in the non-active region, and a plurality of pad electrodes 433 and 434 may be disposed in the pad region.

[0167] For example, the first pad electrode 433 may be disposed on the gate insulating film 422 disposed in the pad region. The interlayer insulating film 412 may be disposed on the first pad electrode 433 to expose a portion 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.

[0168] Although in Figure 4 Although not shown in the figure, the second pad electrode 434 may be electrically connected to various circuit films.

[0169] Refer to the following Figures 6 to 8 The structure and optical path of the organic light emitting display panel according to an embodiment of the present disclosure are described in more detail.

[0170] Figure 6 It is shown Figure 4 Magnified view of region X. Figure 7 It is shown Figure 4 Magnified view of area Y. Figure 8 It is shown Figure 4 Magnified view of region Z.

[0171] Reference Figure 6 At least one sub-pixel SP may include at least one emission area EA, and one emission area EA may include at least two light emitting parts EA1 and EA2. One non-light emitting part NEA1 may be provided between the two light emitting parts EA1 and EA2.

[0172] Specifically, the first light emitting portion EA1 may be a region corresponding to a portion of the concave portion 443 of the insulating film 440 .

[0173] On the other hand, the first light emitting portion EA1 may be a region that does not overlap with the first portion 481 of the bank 480 in the flat portion 441 of the concave portion 443 .

[0174] The first light emitting portion EA1 may be a region in which a portion L1 of 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 .

[0175] The first light emitting portion EA1 may be a region where a portion L1 of light emitted from the organic layer 460 (hereinafter may be referred to as first light) 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 .

[0176] The first light emitting part EA1 may be surrounded by the first non-light emitting part NEA1.

[0177] The first non-light emitting portion NEA1 may correspond to a region where the bank 480 overlaps the flat portion 441 of the recess 443. Specifically, the first non-light emitting portion NEA1 may correspond to a region where the first portion 481 of the bank 480 overlaps the flat portion 441 of the recess 443.

[0178] The first non-light emitting portion NEA1 may be a region in which a portion L3 of light emitted from the organic layer 460 is guided to a region corresponding to the first portion 481 of the bank 480 but may not be extracted to the outside. In other words, the first non-light emitting portion NEA1 may be a region in which light emitted from the organic layer 460 in a direction parallel to the flat portion 441 reaches the first electrode 450 but is captured in the sub-pixel instead of being reflected to the outside.

[0179] The second light emitting portion EA2 may be disposed to surround the first non-light emitting portion NEA1. The second light emitting portion EA2 may be a region corresponding to a region where the first electrode 450 overlaps the inclined portion 442 of the recess 443. On the other hand, the second light emitting portion EA2 may be a region corresponding to the second region 452 of the first electrode 450.

[0180] A portion L2 of the light emitted from the organic layer 460 (hereinafter may be referred to as second light) may be guided to a region corresponding to the second region 452 of the first electrode 450 .

[0181] Specifically, the second light L2 travels through the first portion 481 of the bank 480 to a region corresponding to a portion 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 portion 481 of the bank 480, the organic layer 460, and the second electrode 470. When the second light L2 is extracted in this way, a second light emitting portion EA2 is formed.

[0182] The first non-light emitting portion NEA1 disposed between the first light emitting portion EA1 and the second light emitting portion EA2 may be a region where visible light from the first light emitting portion EA1 and visible light from the second light emitting portion EA2 are mixed, but embodiments of the present disclosure are not limited thereto.

[0183] The second non-light emitting part NEA2 may be disposed to surround the second light emitting part EA2. The second non-light emitting part NEA2 may correspond to a region in which the second portion 482 of the bank 480 is disposed.

[0184] In the 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 disposed 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 .

[0185] Reference Figure 7 , the height H1 of the inclined portion 442 of the insulating film 440 (or the depth of the recess) may be 0.7 μm or more. The height H1 of the inclined portion 442 refers to the minimum distance from the line extending from the surface of the flat portion 441 of the recess 443 along the surface parallel to the substrate 410 to the surrounding portion 444.

[0186] According to an embodiment of the present disclosure, the height H1 of the inclined portion 442 of the insulating film 440 in which the recess 443 is located is not limited to the above value. For example, the height H1 may be any height at which components below the insulating film 440 are not exposed by the recess 443 of the insulating film 440 .

[0187] The height H1 of the inclined portion 442 may be greater than the height H2 of the bank 480 disposed 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 .

[0188] As such, 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 light extraction efficiency.

[0189] An 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°.

[0190] When the angle a is less than 27°, light emitted from the organic layer 460 may not reach the first electrode 450 disposed on the inclined portion 442, but may be transmitted to another adjacent sub-pixel, resulting in color mixing, or may be captured in the panel PNL without being extracted to the outside.

[0191] When the angle a exceeds 80°, an open circuit may occur in, for example, the first electrode 450 provided on the inclined portion of the insulating film 440 .

[0192] In a region corresponding to the inclined portion 442 of the recess 443 , a distance W between the bank 480 and the surface of the first electrode 450 may be no more than 3.2 μm, no more than 2.6 μm, or no more than 2.0 μm.

[0193] On the other hand, in the second region 452 of the first electrode 450 , a distance W between the bank 480 and the surface of the first electrode 450 may be no more than 3.2 μm, no more than 2.6 μm, or no more than 2.0 μm.

[0194] As W decreases, the first light emitting portion EA1 can be enlarged and the optical path of light reflected and extracted from the second region 452 can be shortened, thereby improving light extraction efficiency. Therefore, although the lower limit of W is not particularly limited, it may be not less than 0.1 μm, not less than 0.3 μm, or not less than 0.5 μm.

[0195] 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.

[0196] Among the light emitted from the organic layer 460 , the second light L2 reaching the region corresponding to a portion of the second region 452 of the first electrode 450 passes through the bank 480 at least twice until being extracted to the outside of the panel.

[0197] When the bank 480 includes a colored organic material or a colored inorganic material, short-wavelength light in the visible light wavelength spectrum may be absorbed and thus not pass through the bank 480 and the second light emitting portion EA2 from which the second light L2 is extracted, and the color coordinates of the first light emitting portion EA1 from which the first light L1 is extracted to the outside may be changed. For example, the color coordinates of the second light emitting portion EA2 may be shifted to a wavelength band longer than that of the color coordinates of the first light emitting portion EA1.

[0198] 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 may correspond to the color coordinates of the light emitted from the second light emitting portion EA2 .

[0199] In the organic light emitting display device according to an embodiment of the present disclosure, light extraction may also be achieved through at least one protrusion 454 of the first electrode 450 disposed in the contact hole CH.

[0200] Refer to the following Figure 8 Describe this.

[0201] Reference Figure 8 , a portion L4 of light emitted from the organic layer 460 may be extracted to the outside of the panel PNL through at least one protrusion 454 disposed in the contact hole CH in which the first electrode 450 is connected to the drain electrode 425 of the thin film transistor TR.

[0202] Specifically, part L4 of light emitted from the organic layer 460 including the emission layer may be guided to a region corresponding to the first portion 481 of the embankment 480 , and rays of the light L4 not absorbed by the embankment 480 may be transmitted through the insulating film 440 to reach the first electrode 450 disposed in the contact hole CH.

[0203] Light having reached the first electrode 450 may 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 according to the thickness of the first electrode 450 disposed in the contact hole CH.

[0204] For example, when the first electrode 450 including the light reflective material is thin enough, light reaching 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.

[0205] In this case, with Figure 6 Compared with the second light emitting portion EA2, the second light emitting portion EA2 can be enlarged.

[0206] In other words, in one sub-pixel, the second light-emitting portion EA2 may include: an area where the first electrode 450 overlaps with the inclined portion 442 of the recess 443 of the insulating film 440 until an area where the first electrode 450 is arranged on at least one side surface of the contact hole CH of the insulating film 440 (a contact hole in which the first electrode contacts the thin film transistor).

[0207] However, in this case, when the second light emitting portion EA2 is away from the region where the first electrode 450 overlaps the inclined portion 442 , the brightness of the second light emitting portion EA2 may be reduced.

[0208] Such a structure allows for a larger emission area in the active area of ​​the organic light emitting display device according to an embodiment of the present disclosure.

[0209] Refer to the following Fig. 9 Effects of the display device according to the embodiment of the present disclosure are discussed.

[0210] Fig. 9 is a graph showing light extraction efficiency and contrast ratio (automatically adjusted by light radiated from the outside) depending on a 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.

[0211] The organic light emitting display device according to the comparative example lacks Figure 4 The recess 443 in the insulating film 440 and the protrusion 454 on the top surface of the first electrode 450 are shown, and the organic light emitting display device according to the embodiment of the present disclosure has Figure 4 structure.

[0212] Reference Fig. 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 of the comparative example.

[0213] It can also be determined that despite having a recess 443 of the insulating film 440 in the area 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 contrast between the organic light-emitting display device according to the present embodiment and the organic light-emitting display device according to the comparative example.

[0214] As such, the organic light emitting display device according to an embodiment of the present disclosure may improve light extraction efficiency without deteriorating viewing angle characteristics.

[0215] Although Figures 4 to 8 An example is shown in which the plurality of protrusions 454 are provided on the entire top surface of the first electrode 450 , but embodiments of the present disclosure are not limited thereto.

[0216] Refer to the following Fig.10 Another arrangement of the protrusions 454 on the top surface of the first electrode 450 is discussed.

[0217] Fig.10is a cross-sectional view illustrating an organic light emitting display device according to another embodiment of the present disclosure.

[0218] The configuration and effects that are substantially the same as those described above will not be described repeatedly below.

[0219] Reference Fig.10 , at least one protrusion 1054 may be provided on the top surface of the first electrode 1050 .

[0220] The protrusion 1054 may be provided on a portion of the top surface of the first electrode 1050 disposed in a region corresponding to a region in which the recess 443 in the insulating film 440 is provided. Specifically, at least one protrusion 1054 may be provided on the top surface of the first electrode 1050 disposed in a region corresponding to a region in which the inclined portion 442 in which the recess 443 is provided is provided, but at least one protrusion 1054 may not be provided on the top surface of the first electrode 1050 disposed in a region corresponding to a region in which the flat portion 441 in which the recess 443 is provided is provided.

[0221] The protrusion 1054 may be provided on the entire top surface of the first electrode 1050 provided in a region corresponding to a region in which the surrounding portion 444 of the insulating film 440 is provided.

[0222] 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 disposed in a region corresponding to the inclined portion 442 , and extracted to the outside of the panel PNL.

[0223] 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.

[0224] As described above, since the protrusion 1054 is not provided on the top surface of the first electrode 1050 in the area corresponding to the area where the flat portion 441 of the insulating film 440 is provided, the surface of the first electrode 1050 can be flattened in the area corresponding to the area where the flat portion 441 of the insulating film 440 is provided.

[0225] Therefore, if Fig.10 As shown, the surface of the organic layer 1060 disposed on the top surface of the first electrode 1050 exposed by the bank 480 may be planarized.

[0226] Furthermore, a surface of the source electrode 424 in a region overlapping with the organic layer 1060 may be planarized.

[0227] Although Fig.10A configuration is shown in which the plurality of protrusions 1054 are not provided in the entire top surface of the first electrode 1050 in the region corresponding to the region of the flat portion 441 in which the recess 443 is provided, but the embodiments of the present disclosure are not limited thereto. For example, such a configuration may satisfy that the protrusions 1054 may be provided on a portion of the top surface of the first electrode 1050 in the region corresponding to the region in which the recess 443 of the insulating film 440 is provided or the protrusions 1054 may be provided on a portion of the top surface of the first electrode 1050 in the region corresponding to the region in which the surrounding portion 444 of the insulating film 440 is provided.

[0228] In this way, the density of the protrusions 454 provided in the region corresponding to the region of the flat portion 441 provided with the recesses 443 may be different from the density of the protrusions 454 provided in the region corresponding to the region of the inclined portion 442 provided with the recesses 443 .

[0229] Although Figures 4 to 8 and Fig.10 A configuration is shown in which the organic layer 460 or 1060 of the organic light emitting diode (OLED) is disposed on the first electrode 450 or 1050 exposed by the bank 480 , but embodiments of the present disclosure are not limited thereto.

[0230] Refer to the following Fig.11 A structure of an organic light emitting display device according to another embodiment of the present disclosure is described.

[0231] Fig.11 is a cross-sectional view showing an organic light emitting display device according to still another embodiment of the present disclosure.

[0232] The configuration and effects that are substantially the same as those described above will not be described repeatedly below.

[0233] exist Fig.11 In the structure of Figure 4 Unlike the structure of the organic light emitting diode (OLED), the organic layer 1160 of the organic light emitting diode (OLED) may overlap the first electrode 450 and may be disposed in a region overlapping a top surface of the bank 480 .

[0234] In this case, in order to enable the second electrode 1170 and the auxiliary electrode 430 to contact each other, the bank 480 may have a structure that prevents a material of the organic layer 1160 from being deposited on the auxiliary electrode 430 during the formation of the organic layer 1160 .

[0235] Specifically, Fig.11As shown, the bank 480 may be shaped to become narrower in the area 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 away from the substrate 410, the mouth of the hole exposing the auxiliary electrode 430 of the bank 480 may become narrower.

[0236] As a process for forming the organic layer 1160, deposition or coating in which the source material is characterized by straightness may be used. For example, evaporation may be used. As a process for forming the second electrode 1170, deposition or coating in which the source material has irregular directivity may be used. For example, sputtering may be used.

[0237] Since the mouth of the hole of the bank 480 through which the auxiliary electrode 430 is exposed is narrow, the organic layer 1160 may not be disposed on the auxiliary electrode 430 due to the processing characteristics of the organic layer 1160. Although the mouth of the hole of the bank 480 is narrow, a source material of the second electrode 1170 may enter the hole due to the processing characteristics of the second electrode 1170, so the second electrode 1170 may also be formed on the auxiliary electrode 430.

[0238] The organic light emitting display panel according to an embodiment of the present disclosure may have at least one pixel, and one pixel may have at least two sub-pixels.

[0239] Each sub-pixel may have one first electrode.

[0240] At least one protrusion may be provided on a top surface of a first electrode provided in at least one sub-pixel among a plurality of sub-pixels included in the organic light emitting display panel.

[0241] Refer to the following Figures 12 to 16 A configuration is described in which a protrusion is provided on the top surface of a first electrode in one pixel including a plurality of sub-pixels.

[0242] Fig.12 , Fig.13 , Fig.14 , Fig.15 and Fig.16 is a diagram showing a protrusion on the top surface of the first electrode in one pixel.

[0243] The configuration and effects that are substantially the same as those described above will not be described repeatedly below.

[0244] Reference Fig.12 , one 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. Fig.12 A configuration in which one pixel P includes four sub-pixels is shown, but embodiments of the present disclosure are not limited thereto, and it suffices that one pixel P has two or more sub-pixels.

[0245] According to an embodiment of the present disclosure, the first to fourth sub-pixels 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.

[0246] However, the above configuration is only an example, and in the present embodiment, it suffices that at least two sub-pixels among the first to fourth sub-pixels SP1 , SP2 , SP3 , and SP4 emit light of different colors.

[0247] A first electrode 450 of an organic light emitting diode (OLED) may be disposed in each of the first to fourth sub-pixels SP1 , SP2 , SP3 , and SP4 . A plurality of protrusions 1254 may be disposed on a top surface of the first electrode 450 .

[0248] The protrusions 1254 respectively disposed in the sub-pixels SP1 , SP2 , SP3 , and SP4 may correspond to each other in size and shape.

[0249] In each of the sub-pixels SP1 , SP2 , SP3 , and SP4 , a plurality of protrusions 1254 disposed 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 interval.

[0250] Although Figures 4 to 11 A configuration is shown in which the protrusion 1254 is 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.

[0251] For example, the inorganic film 1258 having the plurality of protrusions 1258a thereon may be disposed on the insulating film 440, and the first electrode 450 may be disposed 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.

[0252] A plurality of protrusions 1254 including a light reflective metal or a transparent conductive material may be disposed on the insulating film 440. The first electrode 450 may be disposed 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.

[0253] Although Fig.12A configuration in which the first electrode 450 is a single layer is shown, but embodiments of the present disclosure are not limited thereto, and the first electrode 450 may be formed in a multi-layer structure. When the first electrode 450 has a multi-layer structure, at least one layer may include a light reflective metal.

[0254] However, the embodiments of the present disclosure are not limited thereto. Fig.13 As shown, the size of the protrusion 1354 disposed in the first sub-pixel SP1, the size of the protrusion 1355 disposed in the second sub-pixel SP2, and the size of the protrusion 1356 disposed in the third sub-pixel SP3 may be different from each other. The size of the protrusion 1356 disposed in the third sub-pixel SP3 may correspond to the size of the protrusion 1357 disposed in the fourth sub-pixel SP4.

[0255] For example, the size of the protrusion 1354 disposed in the first subpixel SP1 may be larger than the size of the protrusion 1355 disposed in the second subpixel SP2, and the size of the protrusion 1355 disposed in the second subpixel SP2 may be larger than the sizes of the protrusions 1356 and 1357 disposed in the third and fourth subpixels SP3 and SP4. However, the above-mentioned size relationship is only an example.

[0256] In other words, the sizes of the protrusions in at least two sub-pixels may be different from each other.

[0257] For ease of description, although Fig.13 An example is shown in which a plurality of protrusions provided in one sub-pixel have the same size, but the protrusions in one sub-pixel may have different sizes.

[0258] Although Fig.13 A configuration in which the protrusions in at least two sub-pixels have different sizes is shown, but according to an embodiment of the present disclosure, the protrusions in at least two sub-pixels may have different shapes.

[0259] like Fig.13 As shown, a plurality of protrusions 1357 disposed in at least one sub-pixel SP4 may be spaced apart from each other, and the protrusions 1357 adjacent to each other may have different intervals d1 and d2.

[0260] According to an embodiment of the present disclosure, at least two sub-pixels may have different protrusion densities. For example, the density of the protrusions 1356 disposed in the third sub-pixel SP3 may be greater than the density of the protrusions 1357 disposed in the fourth sub-pixel SP4.

[0261] like Figures 14 to 16 As shown, at least one sub-pixel may not have a protrusion disposed on the top surface of the first electrode 450 .

[0262] For example, Fig.14 As shown, a plurality of protrusions 1254 may be provided on the top surface of the first electrode 450 provided only in the first sub-pixel SP1, or as shown in FIG. Fig.15 As shown, a plurality of protrusions 1254 may be provided on the top surface of the first electrode 450 provided only in the first sub-pixel SP1 and the second sub-pixel SP2, or as shown in FIG. Fig.16 As shown, a plurality of protrusions 1254 may be provided on the top surface of the first electrode 450 provided only in the first to third sub-pixels SP1 , SP2 , and SP3 , but embodiments of the present disclosure are not limited thereto.

[0263] As described above, according to an embodiment of the present disclosure, at least one of the size and density (inter-protrusion pitch) of protrusions disposed on the top surface of the first electrode may be different between at least two sub-pixels emitting light of different colors.

[0264] In other words, according to an embodiment of the present disclosure, a protrusion modified in various ways may be provided on the top surface of the first electrode 450 in consideration of optical characteristics or element characteristics of an organic light emitting diode (OLED) provided in each subpixel SP1, SP2, SP3, and SP4.

[0265] According to an embodiment of the present disclosure, since the first electrode of the organic light emitting diode (OLED) is disposed on the inclined portion of the recess 443 and at least one protrusion is disposed on the top surface of the first electrode, the organic light emitting display panel and the organic light emitting display device can have a structure with improved light extraction efficiency.

[0266] 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.

[0267] 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 area may be provided.

[0268] The present disclosure also provides the following configurations.

[0269] 1. An organic light emitting display panel, the organic light emitting display panel comprising an active area having a plurality of sub-pixels, the organic light emitting display panel comprising:

[0270] substrate;

[0271] an insulating film disposed on the substrate, wherein in at least one sub-pixel of the active area, the insulating film includes at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion;

[0272] a first electrode, in the at least one sub-pixel region, the first electrode being disposed on a portion of the concave portion and a surrounding portion disposed around the concave portion, the first electrode including at least one protrusion on a surface thereof;

[0273] a bank including: a first portion provided on the first electrode in a region corresponding to a portion of the recess; and a second portion provided on the insulating film and the first electrode in a region corresponding to the surrounding portion;

[0274] an organic layer overlapping the recess and disposed on the first electrode, the organic layer having a surface shape corresponding to a shape of a top surface of the first electrode having the protrusion on the first electrode; and

[0275] A second electrode is disposed on the organic layer and the bank, the second electrode having a surface shape corresponding to a surface shape of the organic layer in a region overlapping the organic layer.

[0276] 2. The organic light-emitting display panel according to 1, wherein the first electrode comprises a light-reflective metal.

[0277] 3. The organic light emitting display panel according to item 1, wherein:

[0278] In the at least one sub-pixel region,

[0279] At least one thin film transistor is disposed on the substrate and below the insulating film, wherein:

[0280] The insulating film includes a contact hole for exposing a top surface of a source electrode or a drain electrode of the thin film transistor, and wherein,

[0281] The first electrode is electrically connected to the source electrode or the drain electrode through the contact hole.

[0282] 4. The organic light-emitting display panel according to 3, wherein at least one protrusion is provided on a top surface of the first electrode provided in the contact hole.

[0283] 5. The organic light emitting display panel according to 1, wherein the protrusion is provided on the entire or a portion of the top surface of the first electrode provided in a region corresponding to a region where the recess is provided, and wherein,

[0284] The protrusion is provided on the entire top surface of the first electrode provided in a region corresponding to a region where the surrounding portion is provided.

[0285] 6. The organic light-emitting display panel according to 1, wherein no protrusion is provided in a region corresponding to a region where the flat portion is provided, and the protrusion is provided in a region corresponding to a region where the inclined portion of the concave portion is provided.

[0286] 7. The organic light-emitting display panel according to 1, wherein a density of the protrusions provided in a region corresponding to a region where the flat portion of the recess is provided is different from a density of the protrusions provided in a region corresponding to a region where the inclined portion of the recess is provided.

[0287] 8. The organic light emitting display panel according to item 1, wherein the organic light emitting display panel comprises at least two sub-pixels, wherein:

[0288] The first electrode is disposed in each of the sub-pixels, and wherein,

[0289] At least one of a density and a size of the protrusions disposed on the top surface of the first electrode is different between at least two sub-pixels emitting light of different colors.

[0290] 9. The organic light emitting display panel according to 1, wherein each of the sub-pixels comprises an emission region, and wherein:

[0291] An 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.

[0292] 10. The organic light emitting display panel according to 9, wherein the emission area comprises:

[0293] A second light emitting portion surrounding the first light emitting portion, and wherein,

[0294] The second light emitting portion corresponds to a region where the first electrode overlaps the inclined portion of the recess.

[0295] 11. The organic light-emitting display panel according to 10, wherein the color coordinates of the first light-emitting portion are different from the color coordinates of the second light-emitting portion.

[0296] 12. The organic light-emitting display panel according to 10, wherein a first non-light-emitting portion is provided between the first light-emitting portion and the second light-emitting portion.

[0297] 13. The organic light-emitting display panel according to 12, wherein the first non-light-emitting portion is smaller in size than the first light-emitting portion and the second light-emitting portion.

[0298] 14. The organic light-emitting display panel according to 12, wherein the first non-light-emitting portion corresponds to a region where the first portion of the bank overlaps the flat portion of the recess.

[0299] 15. The organic light-emitting display panel according to 10, further comprising a second non-light-emitting portion surrounding the second light-emitting portion.

[0300] 16. The organic light emitting display panel according to 15, wherein the second non-light emitting portion corresponds to a region in which the second portion of the bank is provided.

[0301] 17. An organic light-emitting display panel according to 9, wherein a second light-emitting portion arranged in at least one of the multiple emission areas includes: an area where the first electrode overlaps with the inclined portion of the recess until an area where the first electrode is arranged on at least one side surface of the contact hole of the insulating film.

[0302] 18. The organic light-emitting display panel according to 17, wherein the brightness of the second light-emitting portion decreases as the distance from the region where the first electrode overlaps the inclined portion of the concave portion increases.

[0303] 19. The organic light-emitting display panel according to 1, wherein the first electrode disposed in the at least one sub-pixel does not include the protrusion.

[0304] 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 contacts the auxiliary electrode through a hole formed in the insulating film and the dam for exposing the auxiliary electrode.

[0305] 21. An organic light emitting display device, comprising an active area having a plurality of sub-pixels, the organic light emitting display device comprising:

[0306] substrate;

[0307] An insulating film is provided on the substrate, and in at least one sub-pixel region, the insulating film includes at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion;

[0308] a first electrode, in the at least one sub-pixel region, the first electrode being disposed on a portion of the concave portion and a surrounding portion disposed around the concave portion, the first electrode including at least one protrusion on a surface thereof;

[0309] a dam including a first portion positioned on a portion of the recess and a second portion positioned on the surrounding portion;

[0310] an organic layer overlapping the recess and disposed on the first electrode, the organic layer having a surface shape corresponding to a shape of a top surface of the first electrode having the protrusion on the first electrode; and

[0311] a second electrode having a surface shape corresponding to a surface shape of the organic layer in a region overlapping with the organic layer, wherein

[0312] 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,

[0313] In the 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,

[0314] The area corresponding to the inclined portion is the second light emitting portion.

[0315] 22. An organic light-emitting display device according to 21, wherein the second light-emitting portion of the at least one sub-pixel includes: an area where the first electrode overlaps with the inclined portion of the recess until an area where the first electrode is arranged on at least one side surface of the contact hole of the insulating film.

[0316] 23. The organic light-emitting display device according to 21, further comprising a second non-light-emitting portion surrounding the second light-emitting portion.

[0317] 24. An organic light emitting display panel, the organic light emitting display panel comprising an active area having a plurality of sub-pixels, the organic light emitting display panel comprising:

[0318] substrate;

[0319] an insulating film disposed on the substrate, wherein in at least one sub-pixel of the active area, the insulating film includes at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion;

[0320] a first electrode, in the at least one sub-pixel region, the first electrode being disposed on a portion of the concave portion and a surrounding portion disposed around the concave portion, the first electrode including at least one protrusion on a surface thereof;

[0321] a bank including: a first portion provided on the first electrode in a region corresponding to a portion of the recess; and a second portion provided on the insulating film and the first electrode in a region corresponding to the surrounding portion; and

[0322] an organic layer overlapping the concave portion and disposed on the first electrode,

[0323] Wherein, the height of the inclined portion is greater than or equal to the height of the second portion of the embankment.

[0324] The above description has been given to enable any technician in the field to make and use the technical concept of the present disclosure, and the above description has been provided in the context of specific applications and their requirements. Various modifications, additions and substitutions to the described embodiments will be obvious to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present disclosure. The above description and the accompanying drawings provide examples of the technical concept of the present disclosure for illustrative purposes only. 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 embodiments shown, but is given the widest scope consistent with the claims. The scope of protection of the present disclosure should be interpreted based on the attached claims, and all technical concepts within their equivalent ranges should be interpreted as included within the scope of the present disclosure.

[0325] Description of Reference Numerals

[0326] 440: Insulation film

[0327] 441: Flat part

[0328] 442: Inclined part

[0329] 443: concave part

[0330] 444: Surrounding

[0331] 450: First electrode

[0332] 454: Protrusion

[0333] 460: Organic layer

[0334] 470: Second electrode

Claims

1. An organic light emitting display panel, the organic light emitting display panel comprising an active area having a plurality of sub-pixels, the organic light emitting display panel comprising: substrate; an insulating film disposed on the substrate, wherein in at least one sub-pixel of the active area, the insulating film includes at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion; a first electrode, in at least one sub-pixel region, the first electrode being disposed on a portion of the concave portion and a surrounding portion disposed around the concave portion, the first electrode including at least one protrusion on a surface thereof; a bank including: a first portion provided on the first electrode in a region corresponding to a portion of the recess; and a second portion provided 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 a shape of a top surface of the first electrode having the protrusion 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 a surface shape of the organic layer in a region overlapping the organic layer; The organic light emitting display panel includes at least two sub-pixels, wherein: The first electrode is disposed in each of the sub-pixels, and wherein, At least one of a density and a size of the protrusions disposed on the top surface of the first electrode is different between at least two sub-pixels emitting light of different colors.

2. The organic light emitting display panel according to claim 1, wherein: The first electrode includes a light reflective metal.

3. The organic light emitting display panel according to claim 1, wherein: In the at least one sub-pixel region, At least one thin film transistor is disposed on the substrate and below the insulating film, wherein: The insulating film includes a contact hole for exposing a top surface of a source electrode or a drain electrode of the thin film transistor, and wherein, The first electrode is electrically connected to the source electrode or the drain electrode through the contact hole.

4. The organic light emitting display panel according to claim 3, wherein: At least one protrusion is disposed on a top surface of the first electrode disposed in the contact hole.

5. The organic light emitting display panel according to claim 1, wherein: The protrusion is provided on the entire or a part of the top surface of the first electrode provided in a region corresponding to a region where the recess is provided, and wherein, The protrusion is provided on the entire top surface of the first electrode provided in a region corresponding to a region where the surrounding portion is provided.

6. The organic light emitting display panel according to claim 1, wherein: No protrusion is provided in a region corresponding to a region where the flat portion is provided, and the protrusion is provided in a region corresponding to a region where the inclined portion of the recessed portion is provided.

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

8. The organic light emitting display panel according to claim 1, wherein: Each of the sub-pixels comprises an emissive region, and wherein, An 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.

9. The organic light emitting display panel according to claim 8, wherein: The emission area includes: A second light emitting portion surrounding the first light emitting portion, and wherein, The second light emitting portion corresponds to a region where the first electrode overlaps the inclined portion of the recess.

10. The organic light emitting display panel according to claim 9, wherein: The color coordinates of the first light emitting portion are different from the color coordinates of the second light emitting portion.

11. The organic light emitting display panel according to claim 9, wherein: A first non-light emitting portion is provided between the first light emitting portion and the second light emitting portion.

12. The organic light emitting display panel according to claim 11, wherein: The first non-light emitting portion is smaller in size than the first light emitting portion and the second light emitting portion.

13. The organic light emitting display panel according to claim 11, wherein: The first non-light emitting portion corresponds to a region where the first portion of the bank overlaps the flat portion of the recess. 14 . The organic light emitting display panel according to claim 9 , further comprising a second non-light emitting portion surrounding the second light emitting portion.

15. The organic light emitting display panel according to claim 14, wherein: The second non-light emitting portion corresponds to a region in which the second portion of the bank is provided.

16. The organic light emitting display panel according to claim 8, wherein: The second light emitting portion provided in at least one of the plurality of emission regions includes: an area where the first electrode overlaps with the inclined portion of the recess until an area where the first electrode is provided on at least one side surface of the contact hole of the insulating film.

17. The organic light emitting display panel according to claim 16, wherein: The luminance of the second light emitting portion decreases as the distance from the region where the first electrode overlaps the inclined portion of the recess increases.

18. The organic light emitting display panel according to claim 1, wherein: A top surface of the first electrode includes a flat region disposed in the at least one sub-pixel that does not include the protrusion.

19. The organic light emitting display panel according to claim 1, wherein: The organic light emitting display panel further includes an auxiliary electrode disposed under the insulating film, and the second electrode contacts the auxiliary electrode through a hole formed in the insulating film and the bank for exposing the auxiliary electrode.

20. An organic light emitting display device, comprising an active area having a plurality of sub-pixels, the organic light emitting display device comprising: substrate; An insulating film is provided on the substrate, and in at least one sub-pixel region, the insulating film includes at least one concave portion, the at least one concave portion including 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 being disposed on a portion of the concave portion and a surrounding portion disposed around the concave portion, the first electrode including at least one protrusion on a surface thereof; a dam including a first portion positioned on a portion of the recess and a second portion positioned on the surrounding portion; an organic layer overlapping the concave portion and disposed on the first electrode, the organic layer having a surface shape corresponding to a shape of a top surface of the first electrode having the protrusion on the first electrode; as well as a second electrode having a surface shape corresponding to a surface shape of the organic layer in a region overlapping with 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, a region where the bank overlaps with the first electrode is a first non-light emitting portion, and wherein, The area corresponding to the inclined portion is a second light emitting portion; The organic light emitting display device includes at least two sub-pixels, wherein: The first electrode is disposed in each of the sub-pixels, and wherein, At least one of a density and a size of the protrusions disposed on the top surface of the first electrode is different between at least two sub-pixels emitting light of different colors.

21. The organic light emitting display device according to claim 20, wherein: The second light emitting portion of the at least one sub-pixel includes a region where the first electrode overlaps the inclined portion of the recess until a region where the first electrode is provided on at least one side surface of the contact hole of the insulating film. 22 . The organic light emitting display device according to claim 20 , further comprising a second non-light emitting portion surrounding the second light emitting portion.

23. An organic light emitting display panel, the organic light emitting display panel comprising an active area having a plurality of sub-pixels, the organic light emitting display panel comprising: substrate; an insulating film disposed on the substrate, wherein in at least one sub-pixel of the active area, the insulating film includes at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion; a first electrode, in at least one sub-pixel region, the first electrode being disposed on a portion of the concave portion and a surrounding portion disposed around the concave portion, the first electrode including at least one protrusion on a surface thereof; a bank including: a first portion provided on the first electrode in a region corresponding to a portion of the recess; and a second portion provided on the insulating film and the first electrode in a region corresponding to the surrounding portion; and an organic layer overlapping the concave portion 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 embankment; The organic light emitting display panel includes at least two sub-pixels, wherein: The first electrode is disposed in each of the sub-pixels, and wherein, At least one of a density and a size of the protrusions disposed on the top surface of the first electrode is different between at least two sub-pixels emitting light of different colors.

24. The organic light emitting display panel according to claim 23, wherein: The first electrode is formed in a single-layer or multi-layer structure including at least one light-reflective metal layer, and wherein the at least one protrusion is formed integrally with the first electrode. 25 . The organic light emitting display panel according to claim 23 , further comprising an inorganic film having a protrusion on a surface thereof and disposed between the insulating film and the first electrode. 26 . The organic light emitting display panel according to claim 23 , further comprising a plurality of protrusions including a light reflective metal or a transparent conductive material and disposed between the insulating film and the first electrode.

27. The organic light emitting display panel according to claim 23, wherein: The organic layer is disposed on the inclined portion and the flat portion of the concave portion, and a thickness of the organic layer disposed on the inclined portion is smaller than a thickness of the organic layer disposed on the flat portion.

28. The organic light emitting display panel according to claim 23, wherein: The first electrode is also provided in the contact hole of the insulating film, and the first electrode provided in the contact hole of the insulating film has at least one protrusion provided on a surface thereof.

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