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

Abstract

Embodiments of the present disclosure relate to an organic light-emitting display panel and an organic light-emitting display device including the same, and more specifically, to an organic light-emitting display panel and an organic light-emitting display device including the following parts: an insulating film having at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion in at least one sub-pixel; a first electrode arranged on the concave portion; an organic layer arranged on the first electrode; a second electrode arranged on the organic layer; an encapsulation layer arranged on the second electrode; and at least one structure arranged on the encapsulation layer, overlapping with at least one light-emitting area, and having at least one side surface on which a light-reflecting member is arranged, thereby enhancing light extraction efficiency.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2019-0112610, filed on September 11, 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] The development of smart society has led to an increase in demand for various types of display panels, such as display devices or lighting devices. Among display panels, organic light-emitting display panels can be thin and lightweight and do not require a separate light source, and therefore have received widespread attention.

[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 trapped inside the organic light emitting display device. Therefore, the light extraction efficiency of the organic light emitting display panel may be reduced, and the lighting efficiency is also 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 enhanced 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 high brightness in a structure in which a plurality of panels are connected.

[0009] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device including a plurality of sub-pixels can be provided, each of the plurality of sub-pixels including at least one light-emitting region. The organic light-emitting display panel includes: an insulating film disposed on a substrate and including at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion in at least one sub-pixel region; a first electrode disposed on the concave portion and a portion of the surrounding portion, the surrounding portion disposed around the concave portion in at least one sub-pixel region; a dyke, the dyke including a first portion disposed on the first electrode in a region corresponding to a portion of the concave portion, and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; an organic layer overlapping the concave portion and disposed on the first electrode, the organic layer including at least one light-emitting layer; a second electrode disposed on the organic layer and the dyke; an encapsulation layer disposed on the second electrode; and at least one structure disposed on the encapsulation layer, overlapping at least one light-emitting region, and having at least one side surface disposed with a light-reflecting member.

[0010] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device including a plurality of sub-pixels may be provided, each of the plurality of sub-pixels including at least one light-emitting region. The organic light-emitting display device includes: an insulating film disposed on a first substrate and including at least one concave portion, the at least one concave portion including a flat portion and an inclined portion surrounding the flat portion in at least one sub-pixel region; a first electrode disposed on the concave portion and a portion of the surrounding portion, the surrounding portion being disposed around the concave portion in at least one sub-pixel region; a levee including a first portion disposed on the first electrode in a region corresponding to a portion of the concave portion, and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; an organic layer overlapping the concave portion and disposed on the first electrode, the organic layer including At least one light-emitting layer; a second electrode, which is arranged on the organic layer and the embankment; an encapsulation layer, which is arranged on the second electrode; and at least one structure, which is arranged on the encapsulation layer, overlaps with at least one light-emitting area, and has at least one side surface on which a light-reflecting member is arranged, wherein, in an area where a flat portion is provided, an area where the first electrode does not overlap with the embankment is a first emission area included in the light-emitting area, wherein, in an area where a flat portion is provided, an area where the embankment overlaps with the first electrode is a first non-emission area, wherein an area corresponding to the inclined portion is a second emission area included in the light-emitting area, and wherein an area corresponding to the surrounding portion is a second non-emission area.

[0011] 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 enhanced light extraction efficiency may be provided.

[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 capable of preventing color mixing between two adjacent sub-pixels 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 high brightness in a structure in which a plurality of panels are connected may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other objects, features and advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 is a view schematically showing a system configuration of an organic light emitting display device according to an embodiment of the present disclosure;

[0016] Figure 2 is a view showing an example 3T (transistor) 1C (capacitor) structure in which one sub-pixel further includes a second transistor electrically connected between a second node of the driving transistor and a reference voltage line;

[0017] Figure 3 is a plan view showing an emission region and a non-emission region included in an active region of an organic light emitting display panel according to an embodiment of the present disclosure;

[0018] Figure 4 It shows that along Figure 3 A cross-sectional view of an area taken along line AB and a portion of a pad area;

[0019] Figure 5 is a view showing the light reflecting member in another position;

[0020] Figure 6 It shows Figure 5 A magnified view of region X;

[0021] Figure 7 It shows Figure 5 An enlarged view of region Y;

[0022] Figure 8 is a cross-sectional view showing an organic light emitting display device according to another embodiment of the present disclosure;

[0023] Figures 9 to 11 is a cross-sectional view showing an organic light emitting display device according to still another embodiment of the present disclosure;

[0024] Fig.12 is a view schematically illustrating an organic light emitting display device according to another embodiment of the present disclosure; and

[0025] Fig.13 It is schematically shown Fig.12 A cross-sectional view of region K of FIG. DETAILED DESCRIPTION

[0026] 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 indicate the same or similar parts, even when they 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 quite unclear, the detailed description of the well-known functions and components incorporated herein will be omitted. The terms used herein, such as "including", "having", "comprising", "constituting", "composing", and "formed by..." are generally intended to allow the addition of other components, unless these terms are used together with the term "only". As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form.

[0027] 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 limit the nature, order, sequence or number of elements, etc., but is only used to distinguish the corresponding element from other elements.

[0028] 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 the first element may not only be “directly connected or coupled to” the second element, or “directly contact or overlaps” the second element, but also that a third element may be “inserted” between the first element and the second element, or the first element and the second element may be “connected or coupled to”, “contacts or overlaps” the first element and the second element 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” the second element, etc.

[0029] When time-related terms, such as "after", "subsequently", "immediately", "before", etc., are used to describe the processing or operation of an element or configuration, or the process or steps in an operation, process, or manufacturing method, unless used with the term "directly" or "immediately", these terms can be used to describe non-continuous or non-sequential processing or operations.

[0030] In addition, when referring to any dimension, relative size, etc., it should be considered that the numerical value of the element or feature, or the corresponding information (e.g., level, range, etc.) includes the tolerance or error range that may be caused by various factors (e.g., processing factors, internal or external influences, noise, etc.), even when no relevant description is specified. In addition, the term "may" fully includes all meanings of the term "can".

[0031] Hereinafter, embodiments of the present disclosure are described in detail with reference to the accompanying drawings.

[0032] Figure 1 is a view schematically illustrating a system configuration of an organic light emitting display device according to an embodiment of the present disclosure.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] For example, depending on the sub-pixel structure, the panel PNL may have other kinds of signal wires, as well as a plurality of data lines DL and a plurality of gate lines GL. The panel PNL may also have a driving voltage wire, a reference voltage wire, or a common voltage wire.

[0037] The kind of signal wires arranged on the panel PNL may vary depending on, for example, a sub-pixel structure or a panel type. In the present disclosure, the concept of signal wires may include electrodes to which signals are applied.

[0038] 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 referred to as a bezel area.

[0039] The active area A / A includes a plurality of sub-pixels SP for displaying an image.

[0040] 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 connecting the pad area to 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.

[0041] The non-active area N / A may also include a gate drive-related wire that transmits a voltage (signal) required for gate drive to the gate driver GDR through a pad electrically connected to the data driver DDR. For example, the gate drive-related wire may include a clock wire for transmitting a clock signal, a gate voltage wire for transmitting gate voltages VGH and VGL, and a gate drive control signal wire for transmitting various control signals required to generate a scan signal. Unlike the gate line GL arranged in the active area A / A, the gate drive-related wire is arranged in the non-active area N / A.

[0042] The driving circuit may include a data driver DDR for driving a plurality of data lines DL, 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.

[0043] The data driver DDR may drive the plurality of data lines DL by outputting data voltages to the plurality of data lines DL.

[0044] The gate driver GDR may drive the plurality of gate lines GL by outputting scan signals to the plurality of gate lines GL.

[0045] 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.

[0046] 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.

[0047] In order to control the data driver DDR and the gate driver GDR, the controller CTR receives timing signals from the outside (e.g., a host system), 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, generates various control signals, and outputs the control signals to the data driver DDR and the gate driver GDR.

[0048] 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).

[0049] 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).

[0050] 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.

[0051] The controller CTR may be implemented as a separate component from the data driver DDR, or the controller CTR together with the data driver DDR may be implemented as an integrated circuit.

[0052] 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.

[0053] The data driver DDR may exchange various signals with the controller CTR via various interfaces.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] For example, depending on the driving scheme or panel design, the data driver DDR may be located on only one side (e.g., the top side or the bottom side) of the panel PNL, and in some cases, the data driver DDR may be located on each of two opposite sides (e.g., both the top side and the bottom side) of the panel PNL.

[0058] For example, depending on the driving scheme or panel design, the gate driver GDR may be located only on one side of the panel PNL (e.g., the left or right side), and in some cases, the gate driver GDR may be located on each of two opposite sides of the panel PNL (e.g., both the left and right sides).

[0059] The data driver DDR may include one or more source driver integrated circuits (SDICs).

[0060] 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.

[0061] Each source driver integrated circuit (SDIC) can be connected to the bonding pad of the panel PNL in a tape automated packaging (TAB) type or a chip on glass (COG) type, or can be directly arranged on the panel PNL. In some cases, each source driver integrated circuit (SDIC) can be integrated and arranged 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.

[0062] 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.

[0063] Each gate driving circuit GDC may include, for example, a shift register and a level shifter.

[0064] Each gate drive circuit GDC can be connected to the bonding pad of the panel PNL in a tape automated packaging (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.

[0065] Figure 2 is a view showing an example 3T (transistor) 1C (capacitor) structure in which one sub-pixel further includes a second transistor electrically connected between the second node of the driving transistor and the reference voltage line.

[0066] 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 the gate node, and the on / off of the second transistor T2 will be controlled.

[0067] An anode (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 (also referred to as a common electrode) of the organic light emitting diode (OLED) may have a base voltage EVSS applied thereto.

[0068] 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.

[0069] The second transistor T2 may be turned on, for example, in a display driving period, and 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).

[0070] 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 the second scan signal SCAN2, thereby transmitting the reference voltage Vref supplied to the reference voltage line RVL to the second node N2 of the driving transistor DRT.

[0071] 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 , thereby transmitting the voltage of the second node N2 of the driving transistor DRT to the reference voltage line RVL.

[0072] 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.

[0073] 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.

[0074] The analog-to-digital converter may be included in a source driver integrated circuit (SDIC) implementing the data driver DDR.

[0075] 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 diode (OLED).

[0076] The capacitor Cst may be an external capacitor intentionally designed to be outside the driving transistor DRT, but not a parasitic capacitor (eg, Cgs or Cgd) as an internal capacitor existing between the first node N1 and the second node N2 of the driving transistor DRT.

[0077] 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.

[0078] 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 the image signal voltage or a voltage corresponding to the data voltage Vdata during a single frame time (or a predetermined time).

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] The plurality of sub-pixels may have the same structure, or some of the plurality of sub-pixels may have different structures.

[0084] The brightness of the panel PNL may vary depending on 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. Described below is a structure of a thin film transistor array film having a structure with enhanced light extraction.

[0085] At least one sub-pixel among the plurality of sub-pixels arranged in the effective area may include at least one concave portion in the insulating film.

[0086] The organic light emitting display panel is described in more detail below with reference to the various drawings.

[0087] Figure 3 is a plan view illustrating an emission region and a non-emission region included in an active region of an organic light emitting display panel according to an embodiment of the present disclosure. Figure 4 It shows that along Figure 3 A cross-sectional view of an area taken along line AB and a portion of a pad area. Figure 4 Only a partial configuration arranged in one sub-pixel SP and a partial region may be shown, for example, a partial configuration arranged in a pad region and a partial region.

[0088] Reference Figure 3 , a plurality of emission areas EA and a plurality of non-emission areas NEA are arranged in the effective area A / A.

[0089] like Figure 3 As shown in , the emission areas EA in at least two or more sub-pixels SP may have different sizes, but embodiments of the present disclosure are not limited thereto.

[0090] Each of the sub-pixels SP arranged in the active area A / A may include a plurality of emission areas EA, and at least one emission area EA may include a plurality of emission areas EA1 and EA2.

[0091] Specifically, the light emitting area EA of one sub-pixel SP may include a first emission area EA1 and a second emission area EA2 surrounding the first emission area EA1.

[0092] The first non-emission area NEA1 may be disposed between the first emission area EA1 and the second emission area EA2 .

[0093] In other words, the first emission area EA1 and the second emission area EA2 may be distinguished from each other by the first non-emission area NEA1.

[0094] The first non-emission area NEA1 may be smaller in size than the first and second emission areas EA1 and EA2.

[0095] When the display device is in the on state, the first non-emission area NEA1 may be in a black state or may have lower brightness than the first and second emission areas EA1 and EA2 due to light incident from at least one of the first and second emission areas EA1 and EA2.

[0096] like Figure 3 As shown in , the first emission area EA1, the second emission area EA2, and the first non-emission area NEA1 may each be an octagon in a plan view. However, the embodiments of the present disclosure are not limited thereto. For example, the first emission area EA1, the second emission area EA2, and the first non-emission area 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.

[0097] The first emission area EA1 and the second emission area EA2 of one pair may be spaced apart from the first emission area EA1 and the second emission area EA2 of another pair, and the second non-emission area NEA2 may be disposed therebetween.

[0098] The second non-emission area NEA2 may be a region which entirely or partially corresponds to a circuit region in which a circuit for driving the first and second emission areas EA1 and EA2 is arranged.

[0099] When the display device is in a turned-on state, the second non-emission area NEA2 may be in a black state or have a lower brightness than the first and second emission areas EA1 and EA2 due to light incident from the second emission area EA2.

[0100] When the first and second non-emission areas NEA1 and NEA2 have lower brightness than the first and second emission areas EA1 and EA2, the brightness of the first non-emission area NEA1 may be higher than that of the second non-emission area NEA2, but embodiments of the present disclosure are not limited thereto.

[0101] Reference Figure 4 The transistor TR disposed on the substrate 410 and the organic light emitting diode (OLED) electrically connected to the transistor TR are disposed in the active area A / A (an area cut along the line AB). There is at least one pad area in the non-active area N / A.

[0102] The transistor TR includes an active layer 421 , a gate electrode 423 , a source electrode 424 , and a drain electrode 425 .

[0103] 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.

[0104] Specifically, a buffer layer 411 is disposed on the substrate 410 . An active layer 421 of the transistor TR is disposed on the buffer layer 411 . A gate insulating film 422 is disposed on the active layer 421 , and a gate electrode 423 is disposed on the gate insulating film 422 .

[0105] Despite Figure 4 4. Although not shown in the figure, 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 with the gate insulating film 422 and the gate electrode 423. In other words, the gate insulating film 422 and the gate electrode 423 may be disposed on the channel region of the active layer 421.

[0106] The interlayer insulating film 412 is disposed on the gate electrode 423. The source electrode 424 and the drain electrode 425 are disposed on the interlayer insulating film 412. The source electrode 424 and the drain electrode 425 may be spaced apart from each other on the interlayer insulating film 412. 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.

[0107] Although the transistor TR may be arranged on the substrate 410 in the above-described structure, the transistor structure of the present disclosure is not limited thereto.

[0108] 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 the opposite end of the active layer 421 .

[0109] A protective film 413 may be disposed while covering the transistor TR.

[0110] The insulating film 440 may be disposed on the protective film 413 .

[0111] The insulating film 440 may be formed of an organic material, but embodiments of the present disclosure are not limited thereto.

[0112] The insulating film 440 may have at least one concave portion 443 in one sub-pixel region. The insulating film 440 may have a surrounding portion 444 surrounding the concave portion 443 and located 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.

[0113] The surface of the flat portion 441 of the concave portion 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.

[0114] The insulating film 440 may have a contact hole spaced apart from the concave portion 443 .

[0115] 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 .

[0116] In the region overlapping with the concave 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 453, 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 concave portion 443.

[0117] As described above, in at least one sub-pixel region, the insulating film 440 may include at least one contact hole spaced apart from the concave portion 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 of the insulating film 440 .

[0118] Specifically, the first electrode 450 may be electrically connected to the source electrode 424 or the drain electrode 425 of the transistor TR.

[0119] like Figure 4 As shown in , the bank 480 may be disposed on portions of the first electrode 450 and the insulating film 440 .

[0120] The embankment 480 may include: a first portion 481, which is arranged on the first electrode 450 in an area corresponding to a portion of the concave portion 443 set in the insulating film 440; and a second portion 482, which is arranged on the insulating film 440 and the first electrode 450 in an area corresponding to a surrounding portion 444 set in the insulating film 440.

[0121] The bank 480 may be arranged to expose a portion of the top surface of the first electrode 450 in the region overlapping the concave portion 443. In other words, at least one sub-pixel may have a region where the first electrode 450 does not overlap the bank 480.

[0122] An organic layer 460 of an organic light emitting diode (OLED) having at least one light emitting layer may be disposed on the first electrode 450 not overlapping the bank 480. The organic layer 460 may be disposed on the first electrode 450 and the bank.

[0123] The second electrode 470 of the OLED may be disposed on the organic layer 460 .

[0124] The organic layer 460 of the organic light emitting diode (OLED) may be formed by coating or deposition having a straightness feature. For example, the organic layer 460 may be formed by physical vapor deposition (PVD), such as evaporation.

[0125] Formed by this method, the organic layer 460 may have a first thickness in a region at a predetermined angle to 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.

[0126] For example, the thickness of the organic layer 460 disposed in the region corresponding to the inclined portion 442 of the concave portion 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 concave portion 443 may be smaller than the thickness of the organic layer 460 disposed on the surrounding portion 444.

[0127] Therefore, when driving the organic light emitting diode (OLED), an area where the thickness of the organic layer 460 is relatively small, that is, an area corresponding to the inclined portion 442 of the concave portion 443 may have the highest current density, and a strong electric field may be applied to the area corresponding to the inclined portion 442 of the concave portion 443.

[0128] The light emitting characteristics of the organic light emitting diode (OLED) in the region corresponding to the inclined portion 442 of the concave portion 443 may become different from the light emitting characteristics of the organic light emitting diode (OLED) in the region corresponding to the flat portion 441 of the concave portion 443, and the OLED may be degraded.

[0129] According to an embodiment of the present disclosure, since the bank 480 is arranged to cover the inclined portion 442 of the concave portion 443, the OLED can be prevented from being degraded in the area corresponding to the inclined portion 442 of the concave portion 443, and the phenomenon that the light emitting characteristics are different in each area is also prevented.

[0130] However, according to an embodiment of the present disclosure, the thickness of the organic layer 460 is not limited thereto, but the organic layer 460 may have a corresponding thickness at each position.

[0131] Meanwhile, the first electrode 450 may include a light reflective metal. Figure 4 The first electrode 450 is shown as a single layer configuration, but the embodiments of the present disclosure are not limited thereto, and the first electrode 450 may be formed as a multi-layer structure. When the first electrode 450 has a multi-layer structure, at least one layer may include a light reflective metal.

[0132] 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.

[0133] The second electrode 470 may include a light-transmitting or semi-transmitting conductive material. For example, the second electrode 470 may include a transparent conductive oxide, such as at least one of indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide, or tin oxide, or may include a semi-transmitting metal, such as magnesium, silver (Ag), or an alloy of magnesium and silver. When the second electrode 470 includes a semi-transmitting metal, the thickness of the second electrode 470 may be less than the thickness of the first electrode 450.

[0134] like Figure 4 As shown in FIG. 4 , an auxiliary electrode 430 (which may also be referred to as an auxiliary conductive line) contacting the second electrode 470 may also be disposed in an area corresponding to the second non-emission area NEA2 in the active area A / A.

[0135] 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 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 to expose the auxiliary electrode 430.

[0136] 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 brightness difference 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 contacting the second electrode 470 can prevent the voltage drop. This can prevent the brightness difference that may occur when the organic light emitting display panel is a large-sized panel.

[0137] although Figure 4 A configuration in which one auxiliary electrode 430 is disposed in each sub-pixel SP is shown, but the embodiments of the present disclosure are not limited thereto. For example, one auxiliary electrode 430 may be disposed for a plurality of sub-pixels SP.

[0138] Figure 4 The position of the auxiliary electrode 430 shown in FIG. 4 is only an example and is not limited thereto.

[0139] 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.

[0140] In order to make the second electrode 470 and the auxiliary electrode 430 contact each other, the bank 480 may have a structure that prevents the material of the organic layer 460 from being deposited on the auxiliary electrode 430 in a process of forming the organic layer 460 .

[0141] Specifically, Figure 4 As shown in , the bank 480 may be shaped to become wider as the bank 480 moves away from the substrate 410 in a region surrounding the hole exposing the auxiliary electrode 430. In other words, as the bank 480 moves farther away from the substrate 410, the opening of the hole exposing the auxiliary electrode 430 of the bank 480 may become narrower.

[0142] As a process for forming the organic layer 460, deposition or coating of a source material having a linear feature may be used. For example, evaporation may be used. As a process for forming the second electrode 470, deposition or coating of a source material having an irregular directionality may be used. For example, sputtering may be used.

[0143] Since the opening of the hole of the bank 480 exposing the auxiliary electrode 430 is narrow, the organic layer 460 may not be disposed on the auxiliary electrode 430 due to the processing characteristics of the organic layer 460. Although the opening of the hole of the bank 480 is narrow, the second electrode 470 may be formed on the auxiliary electrode 430 because the source material of the second electrode 470 enters the hole due to the processing characteristics of the second electrode 470.

[0144] like Figure 4As shown in , a storage capacitor Cst may be arranged in the active area A / A. The storage capacitor Cst may include a first storage capacitor electrode 431 arranged on the same layer as the gate electrode 423, and a second storage capacitor electrode 432 arranged 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.

[0145] According to an embodiment of the present disclosure, the organic light emitting display panel includes a pad region disposed in the non-active area N / A. A plurality of pad electrodes 433 and 434 may be disposed in the pad region.

[0146] For example, the first pad electrode 433 may be disposed on the plurality of insulating films 411 and 412 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. The second pad electrode 434 contacting the first pad electrode 433 may be disposed on the first pad electrode 433 and the interlayer insulating film 412.

[0147] Despite Figure 4 Although not shown in the figure, the second pad electrode 434 may be electrically connected to various circuit films.

[0148] At least one encapsulation layer 490 may be disposed on the second electrode 470 of the OLED.

[0149] For example, the encapsulation layer 490 may include a first encapsulation layer 491 disposed on the second electrode 470 , a second encapsulation layer 492 disposed on the first encapsulation layer 491 , and a third encapsulation layer 493 disposed on the second encapsulation layer 492 .

[0150] As such, when the encapsulation layer 490 is formed in a multi-layer structure, at least one layer thereof may include an inorganic insulating material, and at least another layer thereof may include an organic insulating material.

[0151] According to an embodiment of the present disclosure, although the first encapsulation layer 491 and the third encapsulation layer 493 include an inorganic insulating material, and the second encapsulation layer 492 includes an organic insulating material, the embodiment of the present disclosure is not limited thereto.

[0152] The encapsulation layer 490 may be disposed on the organic light emitting diode (OLED) to prevent moisture or foreign substances from penetrating into the organic light emitting diode (OLED).

[0153] although Figure 4 A configuration in which the encapsulation layer 490 is disposed in the active area A / A is shown, but the embodiments of the present disclosure are not limited thereto, and the encapsulation layer 490 may extend to reach a portion of the non-active area N / A.

[0154] At least one structure 400 may be disposed on the third encapsulation layer 493 .

[0155] The structure 400 may be arranged to overlap a region in which at least one first electrode 450 and the bank 480 do not overlap each other.

[0156] The light reflecting member 401 may be disposed on at least one surface of the structure 400. For example, the light reflecting member 401 may be disposed to surround a side surface of the structure 400 and expose an entire top surface of the structure 400.

[0157] Although the light reflecting member 401 may include a reflective metal, embodiments of the present disclosure are not limited thereto, and the light reflecting member 401 may include any material capable of reflecting light.

[0158] The light reflecting member 401 may be disposed in the non-emission area NEA inside the active area A / A. Therefore, shrinkage in the light emitting area EA, which may occur when the light reflecting member 401 is disposed in the light emitting area EA, may be prevented.

[0159] The position of the light reflecting member 401 is not limited to Figure 4 The position in the structure.

[0160] The following reference Figure 5 Other positions of the light reflecting member 401 are discussed.

[0161] Figure 5 is a view showing the light reflecting member at another position.

[0162] The configuration and effects substantially the same as those described above are not repeatedly described below.

[0163] Reference Figure 5 , the light reflecting member 501 may be disposed to surround a side surface of the structure 400 and overlap a portion of a top surface of the structure 400 .

[0164] The light reflection member 501 may be disposed in the non-emission area NEA inside the active area A / A.

[0165] The light reflecting member 501 plays a role in enabling light (eg, leakage light that degrades the color gamut) that is absorbed by other components or passes through other sub-pixels without being extracted to the outside of the organic light emitting display device to be extracted to the outside of the organic light emitting display device.

[0166] According to an embodiment of the present disclosure, a position of a light reflective member 501 and a path through which light emitted from an organic light emitting diode (OLED) is extracted to the outside of an organic light emitting display device are discussed below with reference to the accompanying drawings.

[0167] Figure 6 It shows Figure 5 Magnified view of region X. Figure 7 It shows Figure 5 Magnified view of area Y.

[0168] The configuration and effects substantially the same as those described above are not repeatedly described below.

[0169] 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 emission areas EA1 and EA2. One non-emission area NEA1 may be disposed between the two emission areas EA1 and EA2.

[0170] Specifically, the first emission region EA1 may be a region corresponding to a portion of the concave portion 443 of the insulation film 440 .

[0171] In another aspect, the first emission area EA1 may be an area that does not overlap with the first portion 481 of the bank 480 in the flat portion 441 of the concave portion 443 .

[0172] The first emission region EA1 may be a region where 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 .

[0173] The first emission region EA1 may be a region where a portion L1 of light emitted from the organic layer 460 (which may hereinafter 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 .

[0174] Specifically, the first light L1 emitted from the organic layer 460 sequentially passes through the second electrode 470 of the organic light emitting diode (OLED), the encapsulation layer 490 , and the structure 400 , and is extracted to the outside of the panel.

[0175] In this case, the structure 400 may play a role of converting the wavelength of light emitted from the organic layer 460 into the wavelength of light of a specific color. For example, the light emitted from the organic layer 460 has a wavelength of blue light, which may be converted into light of a wavelength of red light or green light after passing through the structure 400, and the red light or green light may be extracted to the outside of the panel. In other words, the structure 400 may play a role of a color filter, but the embodiments of the present disclosure are not limited thereto.

[0176] For example, the light emitted from the organic layer 460 may have a wavelength of red light, and after passing through the structure 400, the light may also have a wavelength of red light. In this case, the structure 400 may include the same material as the insulating film 440, but the embodiments of the present disclosure are not limited thereto. For example, the structure 400 may include any material that can convert the wavelength of light emitted from the organic layer 460 into a wavelength of light of other colors, or any material that does not significantly absorb the light emitted from the organic layer 460.

[0177] The first emission area EA1 may be surrounded by the first non-emission area NEA1.

[0178] The first non-emission area NEA1 may correspond to an area where the bank 480 overlaps the flat portion 441 of the concave portion 443. Specifically, the first non-emission area NEA1 may correspond to an area where the first portion 481 of the bank 480 overlaps the flat portion 441 of the concave portion 443.

[0179] The first non-emission area NEA1 may be an area in which a portion L4 of light emitted from the organic layer 460 is guided to an area corresponding to the first portion 481 of the bank 480, but the light L4 may not be extracted to the outside. In other words, the first non-emission area NEA1 may be an area in which light emitted from the organic layer 460 reaches the first electrode 450 in a direction parallel to the flat portion 441, but is captured in the sub-pixel instead of being reflected to the outside.

[0180] When the display device is in an on state, the first non-emission area NEA1 may be in a black state, or the first non-emission area NEA1 may have a lower brightness than the first emission area EA1 and the second emission area EA2 due to light incident from at least one of the first emission area EA1 and the second emission area EA2. For example, the first non-emission area NEA1 disposed between the first emission area EA1 and the second emission area EA2 may be an area where visible light from the first emission area EA1 and visible light from the second emission area EA2 are mixed, but the embodiments of the present disclosure are not limited thereto.

[0181] The second emission area EA2 may be arranged to surround the first non-emission area NEA1. The second emission area EA2 may be an area corresponding to the following area: an area where the first electrode 450 overlaps the inclined portion 442 of the concave portion 443. In another aspect, the second emission area EA2 may be an area corresponding to the second area 452 of the first electrode 450.

[0182] A portion L2 of the light emitted from the organic layer 460 (which may hereinafter be referred to as second light) may be guided to a region corresponding to the second region 452 of the first electrode 450 .

[0183] 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. When 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.

[0184] Specifically, the second light L2 emitted from the organic layer 460 sequentially passes through the second electrode 470 of the organic light emitting diode (OLED), the encapsulation layer 490 , and the structure 400 , and is extracted to the outside of the panel.

[0185] Regarding the light emitted from the organic layer 460 , the third light L3 may also be guided to a region corresponding to the second region 452 of the first electrode 450 .

[0186] Specifically, the third light L3 reaches a region corresponding to a portion of the second region 452 of the first electrode 450 through the first portion 481 of the bank 480. When reaching the first electrode 450, the third light L3 is reflected by the first electrode 450, passes through the first portion 481 of the bank 480 and the organic layer 460, and reaches the second electrode 470.

[0187] Thereafter, the third light L3 may sequentially pass through the second electrode 470 of the organic light emitting diode (OLED), the encapsulation layer 490, and the structure 400, and reach the light reflecting member 501 disposed on one side surface of the structure 400. The third light L3 may be reflected by the light reflecting member 501 to change its path, and then be extracted to the outside of the panel through the structure 400.

[0188] Since the second light L2 and the third light L3 are thus extracted, the second emission area EA2 may exist, and a portion of the second light L2 and the third light L3 may be extracted in a region corresponding to the second emission area EA2.

[0189] The second non-emission area NEA2 may be disposed to surround the second emission area EA2. The second non-emission area NEA2 may correspond to a region in which the second portion 482 of the bank 480 is disposed.

[0190] In the organic light emitting display panel according to an embodiment of the present disclosure, the inclined portion 442 of the concave portion 443 and the bank 480 disposed on the inclined portion 442 of the concave portion 443 may have specific conditions to increase the amount of light extracted from the second emission area EA2.

[0191] Reference Figure 7 , the height H1 of the inclined portion 442 of the insulating film 440 (or the depth of the concave portion) may be 0.7 μm or more. The height H1 of the inclined portion 442 means the minimum distance from the surface of the flat portion 441 of the concave portion 443 to the surrounding portion 444, extending parallel to the surface of the substrate 410.

[0192] According to an embodiment of the present disclosure, the height H1 of the insulating film 440 where the inclined portion 442 of the concave portion 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 concave portion 443 of the insulating film 440 .

[0193] The height H1 of the inclined portion 442 may be greater than the height of the bank 480 disposed on the surrounding portion 444. In another aspect, the height H1 of the inclined portion 442 may be greater than the height of the second portion 482 of the bank 480.

[0194] 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 enhancing light extraction efficiency.

[0195] An angle a between the inclined portion 442 of the concave portion 443 and the horizontal surface may be not less than 27° and less than 80°.

[0196] 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 and cannot be extracted to the outside.

[0197] When the angle a exceeds 80°, an open circuit may occur in, for example, the first electrode 450 disposed on the inclined portion of the insulating film 440 .

[0198] In a region corresponding to the inclined portion 442 of the concave portion 443 , a distance W between the bank 480 and the surface of the first electrode 450 may be not more than 3.2 μm, not more than 2.6 μm, or not more than 2.0 μm.

[0199] On the other hand, a distance W between the bank 480 and the surface of the first electrode 450 in the second region 452 of the first electrode 450 may be no greater than 3.2 μm, no greater than 2.6 μm, or no greater than 2.0 μm.

[0200] As W decreases, the first emission area EA1 may expand and the optical path of light reflected and extracted from the second area 452 of the first electrode 450 may be shortened, thereby enhancing light extraction efficiency. Therefore, although not particularly limited, the lower limit of W may be not less than 0.1 μm, not less than 0.3 μm, or not less than 0.5 μm.

[0201] By adjusting the range of W as described above, the first emission area EA1 may be increased, and light extraction efficiency may be enhanced in the organic light emitting display panel.

[0202] Among the light emitted from the organic layer 460 , the second light L2 and the third light L3 reaching the region corresponding to a portion of the second region 452 of the first electrode 450 pass through the bank 480 at least twice before being extracted to the outside of the panel.

[0203] When light is extracted to the outside of the panel through the above structure 400 and the structure 400 functions as a color filter, color coordinates of the second emission area EA2 generated by the second light L2 and the third light L3 may correspond to color coordinates of the first emission area EA1.

[0204] In the case where light is extracted to the outside of the panel through the above-described structure 400 and the structure 400 includes a material corresponding to the insulating film 440 , the color coordinates of the second emission region EA2 may be different from those of the first emission region EA1 .

[0205] In particular, when the embankment 480 includes a colored organic or inorganic material, short-wavelength light in the visible light wavelength spectrum may be absorbed and thus does not pass through the embankment 480 and the second emission area EA2 (in which the second light L2 and the third light L3 are extracted), and the color coordinates of the first emission area EA1 from which the first light L1 is extracted to the outside may change. For example, the color coordinates of the second emission area EA2 may be shifted to a wavelength band longer than the wavelength band of the color coordinates of the first emission area EA1, but embodiments of the present disclosure are not limited thereto.

[0206] Although the above combination Figures 4 to 7The description mainly focuses on the structure in which the organic layer 460 of the organic light emitting diode (OLED) overlaps the first electrode 450 and the embankment 480 in the active area A / A and is arranged to expose a portion of the top surface of the auxiliary electrode 430, but the embodiments of the present disclosure are not limited thereto.

[0207] For example, the position of the organic layer can be changed, e.g. Figure 8 as shown in .

[0208] Figure 8 is a cross-sectional view showing an organic light emitting display device according to another embodiment of the present disclosure.

[0209] The configuration and effects substantially the same as those described above are not repeatedly described below.

[0210] Reference Figure 8 The organic layer 860 of the organic light emitting diode (OLED) may be disposed on the first electrode 450 , for example, on a top surface of the first electrode 450 that does not overlap the bank 480 .

[0211] The second electrode 870 may be disposed to cover the organic layer 860 and the bank 480 .

[0212] Although Figures 4 to 7 The organic layer 460 emits light of colors corresponding to each other in different sub-pixels, but Figure 8 The organic layer 860 may emit light of different colors in at least two sub-pixels, but embodiments of the present disclosure are not limited thereto.

[0213] The organic light emitting display device according to an embodiment of the present disclosure may include a plurality of sub-pixels arranged in the active area A / A, and structures and light reflecting members may be arranged in various ways corresponding to the plurality of sub-pixels.

[0214] This is the following reference Figures 9 to 11 discussed.

[0215] Figures 9 to 11 is a cross-sectional view showing an organic light emitting display device according to still another embodiment of the present disclosure.

[0216] The configuration and effects substantially the same as those described above are not repeatedly described below.

[0217] Reference Fig. 9 , an organic light emitting display device according to an embodiment of the present disclosure may include a plurality of sub-pixels SP1 , SP2 , and SP3 .

[0218] For example, the organic light emitting display device according to an embodiment of the present disclosure may include a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3.

[0219] Although the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be one pixel (P) unit, embodiments of the present disclosure are not limited thereto. For example, one pixel P may include two or more sub-pixels.

[0220] Although the first subpixel SP1 , the second subpixel SP2 , and the third subpixel SP3 may have light emitting areas emitting light of different colors, embodiments of the present disclosure are not limited thereto.

[0221] like Fig. 9 As shown in , a structure can be arranged in a sub-pixel.

[0222] For example, the first structure 901 , the second structure 902 , and the third structure 903 may be disposed in the first sub-pixel SP1 , the second sub-pixel SP2 , and the third sub-pixel SP3 , respectively.

[0223] When the first subpixel SP1 is a subpixel for emitting red light, the second subpixel SP2 is a subpixel for emitting green light, and the third subpixel SP3 is a subpixel for emitting blue light, the first structure 901, the second structure 902, and the third structure 903 may be a red filter, a green filter, and a blue filter, respectively, but this is merely an example and the embodiments of the present disclosure are not limited thereto.

[0224] Each of the first, second, and third structures 901, 902, and 903 may be disposed in the first emission area EA1, the second emission area EA2, and the first non-emission area NEA1 between the first and second emission areas EA1 and EA2 of each sub-pixel SP1, SP2, and SP3.

[0225] The light reflection member 501 disposed on at least one side surface of the first, second and third structures 901, 902 and 903 may be disposed in the second non-emission area NEA2 without affecting the size of the light emitting area EA including the first and second emission areas EA1 and EA2.

[0226] The first structure 901 , the second structure 902 , and the third structure 903 may be spaced apart from each other.

[0227] The light reflecting member 501 arranged on at least one side surface of each of the first structure 901, the second structure 902 and the third structure 903 can enable the following light to be extracted to the outside of the organic light-emitting display device: the light is not extracted to the outside of the organic light-emitting display device, but is absorbed by other components or passes through other sub-pixels.

[0228] Among the light emitted from the first sub-pixel SP1 , the light passing through the second sub-pixel SP2 or the third sub-pixel SP3 may cause degradation of the color gamut of the organic light emitting display device.

[0229] If a light absorber (eg, a black matrix) is disposed between the first structure 901 , the second structure 902 , and the third structure 903 to prevent such a problem, light extraction efficiency of the organic light emitting display device may be reduced.

[0230] The organic light emitting display device according to the embodiment of the present disclosure can reduce light leakage and enable light emitted from the sub-pixel SP to be extracted to the outside of the panel (otherwise the light would leak), thereby enhancing light extraction efficiency. Therefore, the organic light emitting display device according to the present disclosure can achieve increased brightness.

[0231] although Fig. 9 The structure of the organic light-emitting display device is shown, in which the first structure 901, the second structure 902 and the third structure 903 are arranged to correspond to the first sub-pixel SP1, the second sub-pixel SP2 and the third sub-pixel SP3 arranged in the effective area A / A, respectively, but the embodiments of the present disclosure are not limited to this.

[0232] like Fig.10 As shown in FIG. 1 , in at least one sub-pixel SP3 , the structure and the light reflecting member disposed on at least one side surface of the structure may be omitted.

[0233] For example, in the case where the third subpixel SP3 is a subpixel including a light emitting region for emitting blue light and light emitted from the organic layer 460 of the organic light emitting diode (OLED) is blue light, no structure may be disposed on the encapsulation layer 490 .

[0234] Here, the structure may be an element used as a color filter, but embodiments of the present disclosure are not limited thereto.

[0235] like Fig.10 As shown in FIG. 1 , structures 901 and 902 that can be used as color filters may be disposed only in some of the sub-pixels SP1 and SP2 , so that the color coordinates of the organic light emitting display device may be properly adjusted and the process may be simplified.

[0236] although Fig. 9 and Fig.10A configuration in which three sub-pixels constitute one pixel P is shown, but embodiments of the present disclosure are not limited thereto.

[0237] Reference Fig.11 , a pixel P may include four sub-pixels SP1, SP2, SP3 and SP4.

[0238] The first subpixel SP1 , the second subpixel SP2 , the third subpixel SP3 , and the fourth subpixel SP4 may be a red subpixel, a green subpixel, a blue subpixel, and a white subpixel, respectively, but embodiments of the present disclosure are not limited thereto.

[0239] The height of the structure arranged in at least one sub-pixel may be different from the height of the structure arranged in other sub-pixels. In other words, at least two of the structures 901, 902, 903 and 1104 arranged in the active area A / A may have different heights.

[0240] For example, the height of the fourth structure 1104 disposed in the fourth sub-pixel SP4 may be less than the heights of the first structure 901, the second structure 902, and the third structure 903. Adjustment of the thickness of the fourth structure 1104 disposed in the fourth sub-pixel SP4 may reduce the absorptivity of light emitted from the light emitting region of the fourth sub-pixel SP4 while reducing the external light reflectivity in the structure without a polarizer.

[0241] Therefore, the height of the light reflecting member 1101 arranged on at least one side surface of the fourth structure 1104 may also be smaller than the height of the light reflecting member 501 arranged on at least one side surface of each of the first structure 901, the second structure 902 and the third structure 903.

[0242] In the organic light emitting display device according to an embodiment of the present disclosure, the heights of the first structure 901, the second structure 902, the third structure 903, and the fourth structure 1104 and the light reflecting members 501 and 1101 may be adjusted, such as Fig.11 as shown in .

[0243] like Figures 4 to 11 As shown in , the organic light emitting display device according to the present disclosure may have a multi-panel structure including two or more panels connected together.

[0244] This is the following reference Figure 12 to Figure 13 discussed.

[0245] Fig.12 is a view schematically illustrating an organic light emitting display device according to another embodiment of the present disclosure. Fig.13 It is schematically shown Fig.12 A cross-sectional view of region K of FIG.

[0246] Configurations and effects substantially the same as those described above are not repeatedly described below.

[0247] Reference Fig.12 , an organic light emitting display device according to another embodiment of the present disclosure may have a structure in which two or more panels PNL1 , PNL2 , PNL3 , . . . are connected together.

[0248] For example, Fig.12 The plurality of panels PNL1, PNL2, PNL3, . . . of the organic light emitting display device may include Figure 4 , Figure 5 , Figure 8 , Fig. 9 and Fig.10 At least one of the panel structures shown in .

[0249] Reference Fig.13 , the organic light emitting display device according to an embodiment of the present disclosure may include a first panel PNL1 including a first substrate 1410 and a second panel PNL2 including a second substrate 1510 .

[0250] The active area A / A of the first panel PNL1 may have Figure 5 The effective area A / A has the same structure, but the embodiments of the present disclosure are not limited thereto.

[0251] A buffer layer 411 and an interlayer insulating film 412 may be disposed on the first substrate 1410 in the non-active area N / A of the first panel PNL1 .

[0252] A plurality of signal lines 1411 extending up to the active area A / A may be arranged on the interlayer insulating film 412. A protective film 413 may be arranged on the plurality of signal lines 1411. A plurality of pads 1412 may be arranged on the protective film 413.

[0253] The pad 1412 may be electrically connected to the signal line 1411 , and the pad 1412 and the signal line 1411 may be electrically connected to a plurality of lines (or conductive lines) arranged in the active area A / A to supply signals for driving sub-pixels.

[0254] Fig.13 The layout structure of the signal line 1411 and the pad 1412 is only an example and is not limited to Fig.13 The pad 1412 may have a structure similar to Figure 5 The structure corresponding to the structure.

[0255] Meanwhile, the pad 1412 disposed on the first substrate 1410 may be disposed such that one side surface thereof is exposed to the outside, such as Fig.13as shown in .

[0256] At least one dam portion 1420 may be disposed on the protection film 413 of the non-active area N / A.

[0257] The first encapsulation layer 491 , the second encapsulation layer 492 , and the third encapsulation layer 493 may be sequentially disposed on the first substrate 1410 where the dam portion 1420 is disposed.

[0258] The dam portion 1420 may prevent the second encapsulation layer 492 including an organic material from flowing to the outside of the first substrate 1410 .

[0259] In the active area A / A, the structure 400 and the light reflection member 501 may be disposed on the encapsulation layer 490 .

[0260] The adhesive layer 1330 may be disposed on the first substrate 1410 disposed with the structure 400 and the light reflection member 501. The upper substrate 1340 may be disposed on the adhesive layer 1330. The adhesive layer 1330 and the upper substrate 1340, together with the encapsulation layer 490, may prevent the penetration of moisture and foreign matter, but the embodiments of the present disclosure are not limited thereto.

[0261] The lower substrate 1510 connected to the sealant 1445 may be disposed on the rear surface of the first substrate 1410 .

[0262] The connection electrode 1470 may be disposed on the rear surface of the lower substrate 1510 , and the connection electrode 1470 may be electrically connected to a driving circuit 1480 (eg, COF) via a conductive adhesive layer 1481 .

[0263] The connection member 1460 may be disposed on one side surface of the first panel PNL1.

[0264] The connection member 1460 may be disposed to surround a portion of the top surface of the upper substrate 1340 of the first panel PNL1 , one side surface of the upper substrate 1340 , one side surface of the lower substrate 1510 , and a portion of the rear surface of the lower substrate 1510 .

[0265] The connection member 1460 may include a conductive layer 1461 , and a cover layer 1462 surrounding the outside of the conductive layer 1461 .

[0266] The conductive layer 1461 may function to electrically connect a pad 1412 on the first substrate 1410 with a connection electrode 1470 disposed on the rear surface of the lower substrate 1510 , wherein one side surface of the pad 1412 is exposed to the outside.

[0267] The structure of the second panel PNL2 may be the same as that of the first panel PNL1 , and the two panels PNL1 and PNL2 may be arranged adjacent to each other with the connection member 1460 interposed therebetween.

[0268] The distance Z between the first substrate 1410 of the first panel PNL1 and the second substrate 1510 of the second panel PNL2 may correspond to the width of one emission area EA. The width of the emission area EA may refer to the maximum length of the emission area EA along the longitudinal direction of the first and second substrates 1410 and 1510.

[0269] As such, when the distance Z between the first substrate 1410 and the second substrate 1510 corresponds to the width of one light emitting area EA, although a plurality of panels are connected together, the boundaries between the panels may not be recognized by the user.

[0270] According to the embodiments of the present disclosure, high brightness can be obtained through the structure and the light reflecting member. Therefore, for an organic light emitting display device having a plurality of panels connected together, high brightness can be provided.

[0271] According to an embodiment of the present disclosure, an organic light-emitting display panel and an organic light-emitting display device can be provided, wherein the organic light-emitting display panel and the organic light-emitting display device have a structure with enhanced light extraction efficiency through a structure arranged to correspond to a light-emitting area and a light-reflecting member arranged to correspond to a second non-emitting area.

[0272] 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.

[0273] According to an embodiment of the present disclosure, an organic light emitting display panel and an organic light emitting display device having high brightness in a structure in which a plurality of panels are connected may be provided.

[0274] The above description has been presented to enable any technician in the field to make and use the technical ideas 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 apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present disclosure. For illustrative purposes only, the above description and accompanying drawings provide examples of the technical ideas of the present disclosure. That is, the disclosed embodiments are intended to illustrate the scope of the technical ideas of the present disclosure. Therefore, the scope of the present disclosure is not limited to the embodiments shown, but conforms to 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 ideas within the scope of their equivalents should be interpreted as being included within the scope of the present disclosure.

[0275] [Legend of Figure Numbers]

[0276] 400: Structure

[0277] 401: Light reflecting member

[0278] 440: Insulation film

[0279] 441: Flat part

[0280] 442: Inclined part

[0281] 443: Concave part

[0282] 444: Around the part

[0283] 450: First electrode

[0284] 460: Organic layer

[0285] 470: Second electrode

Claims

1. An organic light emitting display panel comprising a plurality of sub-pixels, each of the plurality of sub-pixels comprising at least one light emitting region, the organic light emitting display panel comprising: substrate; an insulating film disposed on the substrate and including at least one concave portion including a flat portion and an inclined portion surrounding the flat portion in at least one sub-pixel region; a first electrode disposed on a portion of a surrounding portion and the concave portion, wherein the surrounding portion is disposed around the concave portion in the at least one sub-pixel region; a bank including a first portion disposed on the first electrode in a region corresponding to a portion of the concave portion, and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; an organic layer overlapping the concave portion and disposed on the first electrode, the organic layer comprising at least one light-emitting layer; a second electrode disposed on the organic layer and the bank; an encapsulation layer, the encapsulation layer being disposed on the second electrode; at least one structure disposed on the encapsulation layer, the structure having a tapered shape extending away from an upper surface of the encapsulation layer and overlapping a portion of the flat portion in the at least one sub-pixel region; as well as a light reflecting member disposed on a first inclined side surface of the structure, a second inclined side surface of the structure opposite to the first inclined side surface, and a portion of a top surface of the structure, The light reflecting member includes an opening, and the opening is arranged to overlap with a portion of the structure and a portion of the planar portion in the at least one sub-pixel region.

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: One of the at least one structures overlaps with a light emitting region, and wherein, The light reflecting member disposed on the first inclined side surface or the second inclined side surface of the structure overlaps the bank.

4. The organic light emitting display panel according to claim 1, comprising a plurality of said structures, wherein: One of the structures is arranged adjacent to and spaced apart from another one of the structures.

5. The organic light emitting display panel according to claim 1, wherein: The light reflecting member exposes all or part of a top surface of the structure.

6. The organic light emitting display panel according to claim 1, comprising a plurality of said structures, wherein: At least two of the structures convert light emitted from the light emitting layer into different wavelengths.

7. The organic light emitting display panel according to claim 1, wherein: The color of light emitted from the light emitting layer corresponds to the color of light transmitted through the structure.

8. The organic light emitting display panel according to claim 1, comprising a plurality of the structures respectively arranged in a plurality of light emitting regions, wherein: At least two of the structures have different heights; and The at least two structures convert light emitted from the light emitting layer into light having different wavelengths.

9. The organic light emitting display panel according to claim 1, wherein: A light emitting region of at least one of the plurality of sub-pixels includes a first emission region in which a first portion of the bank does not overlap with the first electrode in the flat portion of the concave portion.

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

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

12. The organic light emitting display panel according to claim 10, wherein: A first non-emitting region is disposed between the first emitting region and the second emitting region.

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

14. The organic light emitting display panel according to claim 12, wherein: The first non-emission region corresponds to a region where the first portion of the bank overlaps the flat portion of the concave portion. 15 . The organic light emitting display panel according to claim 10 , further comprising a second non-emitting region surrounding the second emitting region.

16. The organic light emitting display panel according to claim 15, wherein: The second non-emitting region corresponds to a region where the second portion of the bank is disposed.

17. An organic light emitting display device comprising a plurality of sub-pixels, each of the plurality of sub-pixels comprising at least one light emitting region, wherein: The organic light emitting display device includes a plurality of display panels connected to each other, wherein one of the plurality of display panels includes: a first substrate; an insulating film disposed on the first substrate and including at least one concave portion including a flat portion and an inclined portion surrounding the flat portion in at least one sub-pixel region; a first electrode disposed on a portion of a surrounding portion and the concave portion, wherein the surrounding portion is disposed around the concave portion in the at least one sub-pixel region; a bank including a first portion disposed on the first electrode in a region corresponding to a portion of the concave portion, and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; an organic layer overlapping the concave portion and disposed on the first electrode, the organic layer comprising at least one light-emitting layer; a second electrode disposed on the organic layer and the bank; an encapsulation layer, the encapsulation layer being disposed on the second electrode; at least one structure disposed on the encapsulation layer, the structure having a tapered shape extending away from an upper surface of the encapsulation layer and overlapping a portion of the flat portion in the at least one sub-pixel region; and a light reflecting member disposed on a first inclined side surface of the structure, a second inclined side surface of the structure opposite to the first inclined side surface, and a portion of a top surface of the structure, wherein the light reflecting member includes an opening disposed to overlap a portion of the structure and a portion of the flat portion in the at least one sub-pixel region, in, In the region where the flat portion is provided, a region where the first electrode does not overlap with the bank is a first emission region included in the light emitting region, wherein, In the region where the flat portion is provided, a region where the bank overlaps with the first electrode is a first non-emission region, wherein, A region corresponding to the inclined portion is a second emission region included in the light emitting region, and wherein, A region corresponding to the surrounding portion is a second non-emission region.

18. The organic light emitting display device according to claim 17, wherein: Another display panel of the plurality of display panels includes a second substrate, and wherein, The distance between the first substrate and the second substrate corresponds to the width of a light emitting region of the first substrate.

19. The organic light emitting display device according to claim 17, wherein: At least one first connection electrode is arranged below the first substrate, and wherein, The first connection electrode and the pad disposed on the first substrate are electrically connected to each other through a connection member disposed on a side surface of the one display panel.

20. An organic light emitting display panel comprising a plurality of sub-pixels, each of the plurality of sub-pixels comprising at least one light emitting region, the organic light emitting display panel comprising: a first substrate; an insulating film disposed on the first substrate and including at least one concave portion including a flat portion and an inclined portion surrounding the flat portion in at least one sub-pixel region; a first electrode disposed on a portion of a surrounding portion and the concave portion, wherein the surrounding portion is disposed around the concave portion in the at least one sub-pixel region; a bank including a first portion disposed on the first electrode in a region corresponding to a portion of the concave portion, and a second portion disposed on the insulating film and the first electrode in a region corresponding to the surrounding portion; an organic layer overlapping the concave portion and disposed on the first electrode, the organic layer comprising at least one light-emitting layer; a second electrode disposed on the organic layer and the bank; an encapsulation layer, the encapsulation layer being disposed on the second electrode; as well as at least one structure disposed on the encapsulation layer, the structure having a tapered shape extending away from an upper surface of the encapsulation layer and overlapping a portion of the flat portion in the at least one sub-pixel region; as well as a light reflecting member disposed on a first inclined side surface of the structure, a second inclined side surface of the structure opposite to the first inclined side surface, and a portion of a top surface of the structure, wherein the light reflecting member includes an opening disposed to overlap a portion of the structure and a portion of the flat portion in the at least one sub-pixel region, in, In the region where the flat portion is provided, a region where the first electrode does not overlap with the bank is a first emission region included in the light emitting region, wherein, In the region where the flat portion is provided, a region where the bank overlaps with the first electrode is a first non-emission region, wherein, A region corresponding to the inclined portion is a second emission region included in the light emitting region, and wherein, A region corresponding to the surrounding portion is a second non-emission region.

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