Organic light emitting display apparatus

Abstract

To provide a light emitting display apparatus capable of improving the light extraction efficiency.SOLUTION: An organic light emitting display apparatus includes: a plurality of subpixels in an emission region; and a planarization layer disposed in the plurality of subpixels, the planarization layer including a plurality of light extraction patterns including a convex portion and a plurality of concave portions. At least a light extraction pattern disposed in at least one of the subpixels has a structure of being rotated with respect to a center portion of the plurality of concave portions.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present specification relates to an organic light emitting display device, and more particularly, to an organic light emitting display device capable of reducing reflectance of external light while improving internal light extraction efficiency. [Background technology]

[0002] As the information society develops, interest in and demand for display devices for displaying images has increased in various ways, and the display field has developed rapidly. In response to this, a variety of lightweight and thin flat panel display devices have been developed and are attracting attention. In recent years, display devices such as liquid crystal display devices and organic light emitting display devices have been used.

[0003] OLED displays are self-emissive displays that display images on a display panel through the emission of an organic light-emitting layer interposed between two electrodes. Therefore, unlike LCDs, they do not require a separate light source such as a backlight unit, and can be manufactured in a lightweight and thin design. Furthermore, OLED displays are advantageous in terms of power consumption due to their low voltage operation, and also offer excellent color realization, response speed, viewing angle, and contrast ratio. For these reasons, OLED displays are gaining attention as next-generation display devices.

[0004] An organic light emitting display (OLED) displays an image by emitting internal light to the outside of the display. Research is ongoing to improve the efficiency of the internal light and to improve the reflectance of external light. Summary of the Invention [Problem to be solved by the invention]

[0005] The present specification has a technical object to provide an organic light emitting display device that can improve the light extraction efficiency of light emitted from an emission layer of the organic light emitting display device when the light is emitted to the outside to display an image.

[0006] In addition, the present specification has a technical object to provide an organic light emitting display device that can minimize the occurrence of external light being reflected internally and then re-emitted, or the re-emission due to increased reflectivity caused by a reflective electrode, thereby improving black floating or reflective visibility caused by the reflection of external light, and minimizing or reducing the occurrence of rainbow unevenness and pearl phenomenon.

[0007] Another technical objective of the present invention is to provide an organic light emitting display device that can minimize or reduce ring unevenness (or ring pattern) and / or pearl unevenness (or pearl pattern) that occurs due to scattering of light generated inside the organic light emitting display device and / or light incident from the outside.

[0008] Furthermore, the present specification has a technical object to provide an organic light emitting display device that can improve the aperture ratio of the organic light emitting display device and minimize or reduce color paleness caused by various scattered lights that may occur inside the organic light emitting display device.

[0009] The present specification has a technical object to provide an organic light emitting display device that can improve the light extraction efficiency of an organic light emitting display device, realize high efficiency and high brightness, extend the life of an organic light emitting element, reduce power consumption, and realize low power consumption.

[0010] The problems solved by one or more embodiments of this specification are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the present invention pertains from the description below. [Means for solving the problem]

[0011] An organic light emitting display device according to an embodiment of the present specification includes a plurality of sub-pixels each including a light emitting region, and a planarization layer disposed in the plurality of sub-pixels and including a plurality of light extraction patterns each having a protrusion and a plurality of recesses, wherein at least one first light extraction pattern among the plurality of light extraction patterns is rotated with respect to a center of each of the plurality of recesses.

[0012] According to one embodiment of the present disclosure, the shape of the light extraction pattern in each of the plurality of sub-pixels has a different rotation angle for each of the plurality of sub-pixels.

[0013] According to one embodiment of the present specification, the rotation angles of the light extraction patterns disposed in two adjacent subpixels among the plurality of subpixels may differ from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

[0014] According to one embodiment of the present specification, among the light extraction patterns arranged in each of a plurality of subpixels, the rotation angles of the light extraction patterns arranged in subpixels of the same color may differ from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

[0015] According to one embodiment of the present specification, the organic light emitting display device further includes a substrate on which a plurality of subpixels are arranged, a plurality of color filter layers respectively arranged to correspond to the corresponding subpixels between the substrate and the planarization layer, and a bank layer defining light emitting areas of the subpixels, each of the plurality of color filter layers extending from the light emitting area of the subpixel to the circuit area.

[0016] According to one embodiment of the present specification, the first subpixel is red, the second subpixel is blue, the third subpixel is white (or white), and the fourth subpixel is green, and the second blue subpixel may be arranged to extend to the circuit areas of the third and fourth subpixels.

[0017] According to one embodiment of the present specification, an organic light emitting display device further includes a substrate on which a plurality of subpixels are arranged, a color filter layer arranged between the substrate and a planarization layer to correspond to corresponding subpixels, and a light emitting element having a first electrode, an emission layer, and a second electrode arranged in the plurality of subpixels, wherein the first electrode is arranged in an emission region of each of the subpixels, and for each of the subpixels, the second electrode includes a connection portion arranged between the emission region and a circuit region outside the emission region, and the color filter layer arranged to correspond to the corresponding subpixel may overlap the connection portion.

[0018] According to one embodiment of the present specification, the plurality of subpixels include first, second, third, and fourth subpixels, and a color filter layer disposed on the subpixel that emits the color with the shortest wavelength among the first to fourth subpixels is disposed so as to extend to and overlap with the connecting portion of the adjacent subpixels of other colors.

[0019] According to one embodiment of the present specification, the first subpixel is red, the second subpixel is blue, the third subpixel is white (or white), and the fourth subpixel is green, and the second subpixel is arranged to overlap the connection portion of the third and fourth subpixels.

[0020] According to one embodiment of the present disclosure, the bank layer is superimposed on the outermost pattern having a rotated structure of the light extraction pattern as a black bank layer.

[0021] According to one embodiment of the present disclosure, the bank layer is disposed as a black bank layer between light extraction patterns having different rotation angles for adjacent sub-pixels.

[0022] According to one embodiment of the present disclosure, the black bank layer is disposed so as to overlap the connecting portion.

[0023] According to one embodiment of the present disclosure, the color filter layer disposed to correspond to the corresponding sub-pixel overlaps the connecting portion.

[0024] According to one embodiment of the present specification, an organic light-emitting display device includes a substrate having edges defined parallel to a first direction and a second direction, a plurality of subpixels in a light-emitting area defined on the substrate, and a planarization layer including a plurality of light extraction patterns in the plurality of subpixels, the plurality of subpixels including a plurality of recesses in each of the plurality of subpixels, wherein a direction between centers of any adjacent ones of the plurality of light extraction patterns is not parallel to the first direction or the second direction.

[0025] According to one embodiment of the present specification, an organic light emitting display device includes a substrate having edges defined parallel to a first direction and a second direction, a plurality of subpixels in a light emitting area defined on the substrate, and a planarization layer including a plurality of light extraction patterns in the plurality of subpixels, the plurality of subpixels including a plurality of recesses in each of the plurality of subpixels, each of the plurality of light extraction patterns having a shape defining one or more axes of symmetry, the one or more axes of symmetry being rotated with respect to the first direction and the second direction to define an angle with respect to the first direction and the second direction.

[0026] According to one embodiment of the present specification, an organic light emitting display device includes a substrate having a plurality of subpixels defined in a light emitting region, a planarization layer positioned on the substrate at the plurality of subpixels and having an upper surface including a plurality of recesses in each of the plurality of subpixels, and a light emitting element in each of the plurality of subpixels, each of the light emitting elements being positioned on a respective recess of the plurality of subpixels and having a conformal shape that directly follows each of the plurality of recesses.

[0027] According to one embodiment of the present specification, an organic light-emitting display device includes a plurality of sub-pixels each including a light-emitting region, and a planarization layer disposed in the plurality of sub-pixels and including a plurality of light extraction patterns each including a protrusion and a plurality of recesses, wherein the light extraction pattern disposed in at least one of the plurality of sub-pixels is oriented at an angle with respect to a center of each of the plurality of recesses.

[0028] According to one embodiment of the present disclosure, the orientation of the light extraction pattern disposed in each of the plurality of sub-pixels is different for each of the plurality of sub-pixels.

[0029] According to one embodiment of the present specification, the orientations of the light extraction patterns disposed in two adjacent subpixels among the plurality of subpixels differ by 3 degrees or more and are within the range of 0 degrees or more and less than 60 degrees.

[0030] According to one embodiment of the present specification, the orientations of the light extraction patterns arranged in the subpixels of the same color among the light extraction patterns arranged in each of the plurality of subpixels differ by 3 degrees or more and are within the range of 0 degrees or more and less than 60 degrees.

[0031] According to one embodiment of the present specification, the orientations of the light extraction patterns arranged in two adjacent subpixels in a first direction, a second direction perpendicular to the first direction, or a diagonal direction among a plurality of subpixels differ by 3 degrees or more and are within a range of 0 degrees or more and less than 60 degrees. [Effects of the Invention]

[0032] The organic light emitting display device according to the present specification may improve the light extraction efficiency of light emitted from the organic light emitting device.

[0033] The organic light emitting display device according to the present specification improves reflective visibility caused by external light incident and internally reflected light, prevents black floating, and thereby realizes true black in a non-driven or off state.

[0034] The organic light emitting display device according to the present disclosure can improve rainbow unevenness by rotating the light extraction pattern irregularly or randomly.

[0035] The organic light emitting display device according to the present specification uses a bank layer disposed between light extraction patterns having a rotated structure as a black bank layer, which can block or improve the path of external light incident and various scattered light that is reflected internally or / and occurs in various paths, thereby improving the aperture ratio and improving the color paleness phenomenon that occurs through various scattering angles.

[0036] The organic light-emitting display device according to the present specification can prevent the occurrence of speckle and pearl phenomena by applying a bank layer disposed between light extraction patterns having an irregular or randomly rotated structure as a black bank layer.

[0037] The organic light emitting display device according to the present disclosure can achieve high efficiency and high brightness, thereby extending the life of the organic light emitting element, and can achieve low power consumption by reducing power consumption. [Brief explanation of the drawings]

[0038] [Figure 1] 1 is a diagram illustrating an organic light emitting display device according to an example of the present specification; [Figure 2] FIG. 2 is a cross-sectional view showing one subpixel (SP) shown in FIG. [Figure 3] FIG. 2 is a diagram showing the planar structure of one pixel (P) shown in FIG. [Figure 4] 4 is an enlarged plan view of part "A" in FIG. 3 according to one embodiment. [Figure 5] 1 is a diagram illustrating a plurality of pixel blocks configured in an organic light emitting display device according to an example of the present disclosure; [Figure 6] 6 is a diagram showing a rotation structure of light extraction patterns for pixel groups arranged in one pixel block shown in FIG. 5. FIG. [Figure 7A] 7 is an enlarged view of a light extraction pattern configured in the pixel group of row 1, column j shown in FIG. 6. FIG. [Figure 7B]7 is an enlarged view of a light extraction pattern configured in a pixel group of 2 rows and j columns shown in FIG. 6. FIG. [Figure 8A] 10 is a diagram illustrating a plurality of pixel blocks configured in an organic light emitting display device according to another embodiment of the present disclosure. [Figure 8B] 8B is a diagram showing a rotation structure of a light extraction pattern for each subpixel arranged in one pixel block shown in FIG. 8A. [Figure 9] 10A and 10B are diagrams illustrating a rotation structure of a plurality of pixel-based light extraction patterns configured in an organic light emitting display device according to another embodiment of the present disclosure; [Figure 10] 10A and 10B are diagrams illustrating a rotation structure of light extraction patterns for a plurality of sub-pixels configured in an organic light emitting display device according to another embodiment of the present disclosure; [Figure 11] FIG. 10 is a diagram illustrating one pixel in an organic light-emitting display device according to still another embodiment of the present disclosure. [Figure 12] 12 is a diagram illustrating a rotation structure of a plurality of sub-pixel light extraction patterns configured in the organic light emitting display device of FIG. 11. FIG. [Figure 13] FIG. 12 is a cross-sectional view taken along line II' shown in FIG. [Figure 14] FIG. 12 is a cross-sectional view taken along line II-II' shown in FIG. [Figure 15] FIG. 2 is a diagram illustrating reflected light inside a display device. [Figure 16A] Photographs showing the color paleness phenomenon. [Figure 16B] 10 is a photograph showing an improved effect of an organic light emitting display device according to another embodiment of the present disclosure; [Figure 17A] 1 is a photograph showing the rainbow phenomenon caused by reflection of external light in a display device. [Figure 17B] 1 is a photograph showing the pearl phenomenon. [Figure 17C] 10 is a photograph showing an effect of improving rainbow unevenness and pearl phenomenon in an organic light emitting display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples to fully convey the spirit of the present invention to those skilled in the art. Therefore, the present invention is not limited to the embodiments described below, and may be embodied in other forms.

[0040] In the drawings, the size and thickness of the device may be exaggerated for convenience. The scales of the components shown in the drawings may differ from the actual scales for convenience of explanation, and are not limited to the scales shown in the drawings. The same reference numerals represent the same components throughout the specification.

[0041] Furthermore, in describing this specification, if it is determined that a detailed description of related publicly known technology would unnecessarily obscure the gist of this specification, the detailed description will be omitted.

[0042] When the terms "comprise," "have," "consist of," etc. are used as mentioned in this specification, other parts can be added unless "only" is used. When an element is expressed in the singular, it also includes plural unless otherwise expressly stated.

[0043] When describing the positional relationship of two parts, e.g., "above," "on top," "beneath," or "adjacent," one or more other parts may be disposed between the two parts, unless, for example, "immediately" or "directly" is used. Spatial relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to easily describe the relationship of one element or component to another, as shown in the figures. Spatial relative terms should be understood to include different orientations of elements in use or operation in addition to the orientation shown in the figures. For example, if elements shown in the figures are inverted, an element described as "below" or "beneath" another element can be positioned "above" the other element. Thus, the exemplary term "below" can encompass both an orientation of below and above.

[0044] In describing elements of the present specification, terms such as first, second, A, B, (a), (b), etc. are used to distinguish the elements from other elements, and do not limit the nature, order, sequence, or number of the elements.

[0045] The features of the various embodiments of this specification may be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms may be possible, and each embodiment may be implemented independently of the others, or may be implemented together in a related relationship.

[0046] The organic light emitting display device of the present specification will be described in detail below with reference to the accompanying drawings and examples.

[0047] FIG. 1 is a diagram illustrating an organic light-emitting display device according to an example of the present specification.

[0048] Referring to FIG. 1, an organic light emitting display device according to an example of the present disclosure may include a display panel 10 including a substrate 100 and an opposing substrate 300 bonded to each other.

[0049] The substrate 100 includes thin film transistors and may be a transparent glass substrate or a transparent plastic substrate. The substrate 100 or the display panel 10 may include a display area (AA) and a non-display area (IA).

[0050] The display area (AA) is an area where an image is displayed, and may be a pixel array area, an active area, a pixel array portion, a display portion, or a screen. The display area (AA) may include a plurality of pixels (P). The plurality of pixels (P) may be unit areas from which actual light is emitted. The pixel (P) may include a plurality of subpixels (SP). According to one embodiment, each of the plurality of pixels (P) may include at least one red subpixel, at least one green subpixel, at least one blue subpixel, and at least one white subpixel.

[0051] The non-display area (IA) is an area where no image is displayed, and may be a peripheral circuit area, a signal supply area, an inactive area, or a bezel area. The non-display area (IA) may be configured to surround the display area (AA). The display panel 10 or the substrate 100 may further include a peripheral circuit unit 120 disposed in the non-display area (IA). The peripheral circuit unit 120 may include gate driving circuits connected to a plurality of pixels (P).

[0052] The opposing substrate 300 may be bonded to the substrate 100 via an adhesive member (or a transparent adhesive), or may be disposed in a manner in which an organic or inorganic material is laminated on the substrate 100. The opposing substrate 300 may be an upper substrate, a second substrate, or a sealing substrate, and may be adapted to seal the substrate 100.

[0053] Fig. 2 is a cross-sectional view showing the cross-sectional structure of one subpixel (SP) according to an example of the present specification, and Fig. 3 is a diagram showing the planar structure of the pixel (P) shown in Fig. 1. Fig. 4 is a plan view showing an enlarged view of part "A" according to an example of Fig. 3.

[0054] Referring to Figures 2 to 4, an organic light-emitting display device according to an example of the present specification may include a plurality of pixels (P), each pixel (P) being configured in a display area (AA) using a plurality of sub-pixels (SP).

[0055] One pixel (P) includes multiple sub-pixels (SP1, SP2, SP3, SP4), and each sub-pixel (SP) includes multiple light extraction patterns 140, 140a, 140b, 140c, 140d in an emitting area (EA) defined by a bank layer 190.

[0056] According to an embodiment, the light extraction pattern 140 disposed in at least one of the plurality of subpixels (SP1, SP2, SP3, SP4) may have a structure rotated with respect to a reference point (or any point) within the light-emitting area (EA). For example, the light extraction pattern 140 disposed in at least one of the plurality of subpixels (SP1, SP2, SP3, SP4) may have a structure rotated with respect to a center (CP) of the plurality of recesses 141. For example, each of the first to fourth light extraction patterns 140a to 140d may be rotated or reverse-rotated at different angles with respect to a reference point within the corresponding light-emitting area (EA) or the center (CP) of one recess 141. Thus, the light extraction patterns 140 formed in each of the subpixels (SP1 to SP4) of the plurality of pixels (P) may be rotated or reverse-rotated at different angles with respect to each other.

[0057] The outermost patterns of the plurality of light extraction patterns 140a, 140b, 140c, and 140d are arranged outside the light emitting area (EA).

[0058] The plurality of subpixels (SP1, SP2, SP3, SP4) include a first subpixel (SP1), a second subpixel (SP2), a third subpixel (SP3), and a fourth subpixel (SP4) that emit different colors, where the first subpixel (SP1) may be a red subpixel, the second subpixel (SP2) may be a white subpixel, the third subpixel (SP3) may be a blue subpixel, and the fourth subpixel (SP4) may be a green subpixel. The light-emitting areas (EA) of the first to fourth subpixels (SP1 to SP4) may have different sizes (or areas).

[0059] A subpixel (SP) may include an emissive area (EA) and a circuit area (CA). The circuit area (CA) may be spatially separated from the emissive area (EA) within the subpixel (SP). The emissive area (EA) may be a region in the subpixel (SP) defined by opening the first electrode (E1) with the bank layer 190. The first electrode (E1) may be an electrode that functions as a pixel electrode or an anode electrode. The circuit area (CA) may be a non-emissive area or a non-open area.

[0060] A gate line (GL) is disposed to extend across the light-emitting area (EA) and circuit area (CA) of each subpixel (SP). A plurality of data lines (DL) or reference lines (RL) may be disposed between each subpixel (SP) to extend across the light-emitting area (EA) and adjacent light-emitting areas (EA) or between adjacent circuit areas (CA). The reference lines (RL) can be used as sensing lines for externally sensing changes in the characteristics of driving thin film transistors and / or light-emitting elements disposed in the circuit areas (CA) during a sensing driving mode of the pixel (P).

[0061] In the organic light emitting display device according to the present specification, a buffer layer 110, a driving thin film transistor (Tdr), a protective layer 130, a planarization layer 170, and a light emitting element (EP) may be stacked on a first surface 100a of a substrate 100. An optical film (not shown) may be disposed on a second surface 100b of the substrate 100. An image is displayed in the direction of the second surface 100b of the substrate 100. For example, the substrate 100 is disposed in the direction in which light from the light emitting element (EP) is emitted.

[0062] The buffer layer 110 disposed on the first surface 100a of the substrate 100 may be disposed over the entire first surface 100a of the substrate 100. The buffer layer 110 may serve to prevent materials contained in the substrate 100 from diffusing into the transistor layer during a high-temperature process during the thin film transistor manufacturing process, or to prevent external moisture or humidity from penetrating into the light emitting device (EP). Optionally, the buffer layer 110 may be composed of multiple layers or may be omitted in some cases.

[0063] The driving thin film transistor (Tdr) is disposed in the circuit area (CA), and may include an active layer 111, a gate insulating film 114, a gate electrode 115, an interlayer insulating film 117, a drain electrode 119d, and a source electrode 119s. The drain electrode 119d and the source electrode 119s may be defined interchangeably depending on the shape of the driving thin film transistor (Tdr).

[0064] The active layer 111 constituting the driving thin film transistor (Tdr) may be made of a semiconductor material based on any one of amorphous silicon, polycrystalline silicon, oxide, and organic material.

[0065] The gate insulating film 113 may be disposed in an island shape only on the channel region of the active layer 111 or may be disposed over the entire substrate 100 or buffer layer 110 including the active layer 111 .

[0066] The interlayer insulating film 117 may be disposed on the gate electrode 115 and the active layer 111. The interlayer insulating film 117 may be disposed over the entire circuit area (CA) and the light-emitting area (EA). The interlayer insulating film 117 may be made of an inorganic material, an organic material, or a combination thereof.

[0067] In the circuit area (CA), a switching thin film transistor and a capacitor may be further arranged together with the driving thin film transistor (Tdr). A light-shielding layer 101 may be further arranged below the active layer 111 of at least one of the driving thin film transistor (Tdr) and the switching thin film transistor on the substrate 100.

[0068] The protective layer 130 may be provided on the substrate 100 to cover the driving thin film transistor (Tdr). The protective layer 130 may be configured to cover the drain electrode 119d, the source electrode 119s, and the interlayer insulating film 117 of the driving thin film transistor (Tdr). The protective layer 130 may be disposed over the entire circuit area (CA) and the light-emitting area (EA). The protective layer 130 may also be referred to as a passivation layer.

[0069] The organic light emitting display device according to this specification may further include a color filter layer 150 on the first surface 100 a of the substrate 100 .

[0070] The color filter layer 150 may be disposed between the substrate 100 and the planarization layer 170 so as to overlap at least one light-emitting area (EA). In other embodiments, the color filter layer 150 may be disposed between the interlayer insulating film 117 and the protective layer 130 so as to overlap the light-emitting area (EA), or may be disposed between the substrate 100 and the interlayer insulating film 117.

[0071] The color filter layer 150 may be larger than the light emitting area (EA). Since the color filter layer 150 is larger than the light emitting area (EA), it may be disposed in an area larger than the area where the plurality of light extraction patterns 140 of the planarization layer 170 are disposed. When the color filter layer 150 is larger than the light extraction patterns 140, it is possible to reduce the occurrence of light leakage, in which internal light leaks into adjacent sub-pixels (SP).

[0072] The color filter layer 150 can transmit red, green, or blue wavelengths according to the color to be realized by each sub-pixel (SP). In the organic light emitting display device according to the present specification, when one pixel (P) is composed of first to fourth sub-pixels (SP), the color filter layer 150 provided in the first sub-pixel (SP1) may include a red color filter, the color filter layer 150 may not be provided in the second sub-pixel (SP2), the color filter layer 150 provided in the third sub-pixel (SP3) may include a blue color filter, and the color filter layer 150 provided in the fourth sub-pixel (SP4) may include a green color filter.

[0073] The planarization layer 170 may be provided on the substrate 100 to cover the protective layer 130. If the protective layer 130 is omitted, the planarization layer 170 may be provided on the substrate 100 to cover the driving thin film transistors (Tdr), the color filter layer 150, and a plurality of wirings. The planarization layer 170 may be disposed over the entire circuit area (CA) and the light-emitting area (EA). The planarization layer 170 may be relatively larger than the display area (AA) and may be disposed up to the non-display area.

[0074] The planarization layer 170 may be disposed to have a relatively large thickness compared to other insulating layers to provide a flat surface over the display area AA. For example, the planarization layer 170 may be made of an organic material such as photo acrylic, benzocyclobutene, polyimide, or fluororesin.

[0075] The planarization layer 170 may include a plurality of light extraction patterns 140 disposed in the light emitting area (EA). The light extraction patterns 140 may be disposed on the upper surface 170a of the planarization layer 170 to overlap the light emitting area (EA). The light extraction patterns 140 may also be disposed on the outer periphery of the light emitting area (EA). The light extraction patterns 140 are formed on the planarization layer 170 in the light emitting area (EA) to have a curved (or uneven) shape, thereby changing the traveling path of light emitted from the light emitting element (EP) and improving light extraction efficiency. The plurality of light extraction patterns 140 may be a microlens array.

[0076] The light extraction pattern 140 may include a first light extraction pattern 140a arranged in the first subpixel (SP1) of the pixel (P), a second light extraction pattern 140b arranged in the second subpixel (SP2) of the pixel (P), a third light extraction pattern 140c arranged in the third subpixel (SP3) of the pixel (P), and a fourth light extraction pattern 140d arranged in the fourth subpixel (SP4) of the pixel (P).

[0077] The light extraction pattern 140 may include a plurality of recesses 141 and a plurality of protrusions 143 arranged around and / or between each of the recesses 141. The protrusions 143 and recesses 141 may be alternately arranged in a connected configuration. The plurality of recesses 141 of the light extraction pattern 140 may be concave with respect to the upper surface 170a of the planarization layer 170, and the convex surface toward the substrate 100 may be lens-shaped and arranged in a connected configuration.

[0078] The recesses 141 may have the same depth as each other relative to the upper surface 170a of the planarization layer 170, but some of the recesses 141 may have different depths.

[0079] The convex portion 143 may be formed to surround each of the plurality of concave portions 141. The upper portion of the convex portion 143, i.e., adjacent to the light emitting element (EP), may have a pointed tip structure or a convex curved shape to improve light extraction efficiency. The upper portion of the convex portion 143 may have a dome or bell structure with a convex cross-sectional shape. For example, the convex portion 143 may be defined at the boundary portion between adjacent light extraction patterns 140. The convex portion 143 may be defined in a point-like shape by the adjacent concave portion 141 as shown in FIG. 2. Although not shown, the convex portion 143 may have a curved shape so that the adjacent light extraction patterns 140 have a wavy surface.

[0080] The convex portion 143 may include a slope having a curved shape between the bottom and the top (or apex). The slope of the convex portion 143 may form or constitute the concave portion 141. For example, the slope of the convex portion 143 may be an inclined surface or a curved portion. According to one embodiment, the slope of the convex portion 143 may have a cross-sectional structure of a Gaussian curve. In this case, the slope of the convex portion 143 may have a tangent slope that gradually increases from the bottom to the top and then gradually decreases.

[0081] The light emitting element (EP) is disposed adjacent to the light extraction pattern 140 overlapping the light emitting area (EA). The light extraction pattern 140 is disposed between the light emitting element (EP) and the substrate 100. The light emitting element (EP) may include a first electrode (E1), an emitting layer (EL), and a second electrode (E2).

[0082] The first electrode (E1) may be formed on the planarization layer 170 in the sub-pixel area (SPA). One end of the first electrode (E1) adjacent to the circuit area (CA) may be electrically connected to the drain electrode 119d (or source electrode 119s) of the driving thin film transistor (Tdr) through an electrode contact hole (CH) provided on the passivation layer 130 or penetrating the planarization layer 170.

[0083] The first electrode (E1) is formed (or deposited) on the planarization layer 170 to have a relatively thin thickness, and therefore has a surface shape that directly follows the surface morphology of the light extraction pattern 140, which includes the convex portion 143 and the plurality of concave portions 141. The first electrode (E1) may have a cross-sectional structure that is the same as that of the light extraction pattern 140.

[0084] The light-emitting layer (EL) may be formed on the first electrode (E1) and may be in direct contact with the first electrode (E1). The light-emitting layer (EL) may be formed (or deposited) on the first electrode (E1) to have a relatively thicker thickness than the first electrode (E1), thereby having a surface shape different from the surface shape of each of the plurality of recesses 141 and protrusions 143 or the surface shape of the first electrode (E1). For example, the light-emitting layer (EL) may be formed in a non-conformal shape that does not directly follow the surface shape (or morphology) of the first electrode (E1) through a deposition process, thereby having a cross-sectional structure different from that of the first electrode (E1). According to one embodiment, the light-emitting layer (EL) may have a thickness that gradually increases toward the bottom of the protrusions 143 or the recesses 141.

[0085] According to one embodiment, the light-emitting layer (EL) may include two or more organic light-emitting layers for emitting white light. For example, the light-emitting layer (EL) may include a first organic light-emitting layer and a second organic light-emitting layer for emitting white light by mixing a first light and a second light.

[0086] The second electrode (E2) may be formed on the light-emitting layer (EL) and may be in direct contact with the light-emitting layer (EL). The second electrode (E2) may be formed (or deposited) on the light-emitting layer (EL) to have a relatively thin thickness compared to the light-emitting layer (EL). The second electrode (E2) may have a surface shape that directly follows the surface shape of the light-emitting layer (EL) by being formed (or deposited) on the light-emitting layer (EL) to have a relatively thin thickness. For example, the second electrode (E2) may be formed in a conformal shape that directly follows the surface shape (or morphology) of the light-emitting layer (EL) by a deposition process, so that it may have the same cross-sectional structure as the light-emitting layer (EL) or a cross-sectional structure different from the light extraction pattern 140.

[0087] The second electrode (E2) may include a metal material having a higher reflectivity than the first electrode (E1) in order to reflect incident light emitted from the light emitting layer (EL) toward the substrate 100. The second electrode (E2) may include a single layer structure or a multilayer structure made of any one material selected from aluminum (Al), silver (Ag), molybdenum (Mo), gold (Au), magnesium (Mg), calcium (Ca), or barium (Ba), or an alloy material of two or more of these. The second electrode (E2) may be a cathode electrode.

[0088] The recesses 141 or protrusions 143 of the light extraction pattern 140 can increase the external extraction efficiency of light emitted from the light emitting layer (EL) by changing the path of light emitted from the light emitting layer (EL) to the second surface 100b of the substrate 100, which is the light exit surface (or light extraction surface).

[0089] The light emitting display device according to the present specification may further include a bank layer 190. The bank layer 190 may be disposed on the planarization layer 170 to cover the edge of the first electrode (E1). The bank layer 190 may be formed of an organic material such as a benzocyclobutene (BCB)-based resin, an acrylic-based resin, or a polyimide resin.

[0090] The bank layer 190 may be made of a transparent material or an opaque material. The bank layer 190 may be formed of a photosensitive agent containing a black pigment. If the bank layer 190 contains an opaque material or a black pigment, it may be called a black bank layer. In this case, if the bank layer 190 is a black bank layer, it may also serve as a light-blocking member between adjacent sub-pixels (SP).

[0091] Since the light extraction pattern 140 may be arranged wider than the light emitting area (EA), the bank layer 190 is arranged to overlap the light extraction pattern 140. The tip of the bank layer 190 (or the boundary line of the bank layer) adjacent to the light emitting area (EA) may be arranged to cover the edge of the outermost pattern of the light extraction pattern 140.

[0092] A sealing portion 200 can be disposed between the light emitting element (EP) and the counter substrate 300.

[0093] The encapsulant 200 may be formed on the substrate 100 to cover the second electrode E2. For example, the encapsulant 200 may surround the display area. The encapsulant 200 may protect the thin film transistor and the light-emitting layer (EL) from external impact and may prevent oxygen and / or moisture, as well as particles, from penetrating into the light-emitting layer (EL).

[0094] According to one embodiment, the encapsulating unit 200 may include a plurality of inorganic encapsulating layers. The encapsulating unit 200 may further include at least one organic encapsulating layer interposed between the plurality of inorganic encapsulating layers. According to another embodiment, the encapsulating unit 200 may include a filler that entirely surrounds the display area. In this case, the opposing substrate 300 may be bonded to the substrate 100 via the filler. The filler may further include a getter material that absorbs oxygen and / or moisture.

[0095] 4, the light extraction pattern 140 of the organic light emitting display device according to an embodiment of the present disclosure may be arranged with regular intervals along a first direction (X) and may be arranged with regular intervals along a second direction (Y) intersecting the first direction (X). The first direction (X) may be a first longitudinal direction of the substrate, a long-side longitudinal direction of the display panel, a lateral direction, or a horizontal direction. The second direction (Y) may be a second longitudinal direction of the substrate, a short-side longitudinal direction of the display panel, a longitudinal direction, or a vertical direction.

[0096] According to one embodiment, the centers (CP) of three adjacent recesses 141 may form a triangular shape (TS). Furthermore, when the centers (CP) of six recesses 141 arranged around or surrounding one recess 141 are connected to each other, a hexagon (HS) may be formed in a plan view. The outer periphery of each of the plurality of recesses 141 may be arranged or have a shape of a honeycomb structure, a honeycomb structure, or a circle structure.

[0097] The plurality of recesses 141 of the light extraction pattern 140 have a structure rotated with respect to a first direction (X) or / and a second direction (Y). For example, the light extraction pattern 140 has a structure in which the plurality of recesses 141 are rotated around a reference point within the light-emitting region with respect to the first direction (X) or / and the second direction (Y). Throughout this specification, the rotated structure of the light extraction pattern 140, or any portion thereof, may be considered to refer to the light extraction pattern 140 being oriented (or angularly positioned) at an angle, such as an angle relative to a reference point or an angle relative to the center of each of the plurality of recesses. For example, throughout this specification, the light extraction pattern 140 having a rotated structure may be considered to have an orientation (e.g., a rotational orientation or angular position) in a plane defined by the first direction (X) and the second direction (Y) with respect to the reference point or the center of each of the plurality of recesses.

[0098] According to one embodiment, when the center (CP) of one recess 141 among the plurality of recesses 141 arranged along the first direction (X) is arranged so that it is located or aligned on a first straight line (SL1) aligned with or parallel to the first direction (X), the center (CP) of another recess 141 arranged adjacent to the one recess 141 may be arranged so that it is not located or aligned on the first straight line (SL1) aligned with or parallel to the first direction (X). For example, in the example of Figure 4, the recesses do not have an axis of symmetry parallel to the first direction (X).

[0099] Furthermore, when the center (CP) of one recess 141 among the multiple recesses 141 arranged along the second direction (Y) is arranged so that it is positioned or aligned on a second straight line (SL2) aligned with or parallel to the second direction (Y), the center (CP) of another recess 141 arranged adjacent to one recess 141 may be arranged so that it is not positioned or aligned on the second straight line (SL2) aligned with or parallel to the second direction (Y). For example, in the example of Figure 4, the recesses do not have an axis of symmetry parallel to the second direction (Y).

[0100] The recesses 141 may be configured within the pixel area rotated by a rotation angle (θ3) greater than 0 degrees and less than 60 degrees around an arbitrary reference point. Throughout this specification, the rotation angle of the light extraction pattern 140 may be considered to have an orientation (e.g., a rotational orientation or angular position) in a plane defined by the first direction (X) and the second direction (Y) relative to the reference point or the center of each recess. The orientation of each light extraction pattern 140 may be measured with respect to the same reference point or the same reference direction (e.g., the first direction (X) or the second direction (Y)). For example, the rotation angle of the light extraction patterns 140 may be set irregularly or randomly along one or more of the first direction (X) and the second direction (Y) within a range of the rotation angle (θ3) greater than 0 degrees and less than 60 degrees. Throughout this specification, the rotation angle of the light extraction patterns in each subpixel may be measured with respect to (and / or relative to) the corresponding portion of each subpixel. The arbitrary reference point may be any position within the light-emitting area (EA) of each of the first to fourth sub-pixels (SP1 to SP4) of the pixel (P), or may be the center (CP) of any one of the plurality of recesses 141.

[0101] The multiple recesses 141 of the light extraction pattern 140 may be configured to be rotated (or horizontally rotated) or reverse rotated (or horizontally reverse rotated) at a preset third angle (θ3) around an arbitrary reference point.

[0102] Specifically, when the recesses 141 are arranged in a planar honeycomb structure, diagonal center lines (DCL1, DCL2) passing through the centers (CP) of the recesses 141 arranged along diagonal directions (DD1, DD2) between the first direction (X) and the second direction (Y) may be inclined from the first straight line (SL1) and the second straight line (SL2). For example, the first angle (θ1) between the diagonal center lines (DCL1, DCL2) and the first straight line (SL1) may be 30 degrees, and the second angle (θ2) between the diagonal center lines (DCL1, DCL2) and the second straight line (SL2) may be 60 degrees. When the recesses 141 of the light extraction pattern 140 are rotated 60 degrees around an arbitrary reference point, the recesses 141 of the light extraction pattern 140 may be configured the same as when they are not rotated around an arbitrary reference point.

[0103] According to one embodiment, the centers (CP) of the recesses 141 arranged along the first direction (X) may be located or aligned with a first tilt line (TL1) that intersects with a first straight line (SL1), and the centers (CP) of the recesses 141 arranged along the second direction (Y) may be located or aligned with a second tilt line (TL2) that intersects with a second straight line (SL2).

[0104] The first tilt line (TL1) can be tilted or inclined from the first straight line (SL1) at an angle (θ3) greater than 0 degrees and less than 60 degrees. For example, the angle (θ3) between the first tilt line (TL1) and the first straight line (SL1) and / or the second tilt line (TL2) can be greater than 0 degrees and less than 60 degrees. For example, the first tilt line (TL1) can be tilted or inclined from the first straight line (SL1) and pass through the center (CP) of the rotated recess 141, and can be a first tilt center line or a first center extension line, and the second tilt line (TL2) can be tilted or inclined from the second straight line (SL2) and pass through the center (CP) of the rotated recess 141, and can be a second tilt center line or a second center extension line.

[0105] When the plurality of recesses 141 are arranged in a honeycomb structure in a plane and rotated about a reference point, the fourth angle (θ4) between the diagonal center lines (DCL1, DCL2) and the first tilt line (TL1) may be 30 degrees, and the fifth angle (θ5) between the diagonal center lines (DCL1, DCL2) and the second straight line (SL2) may be 60 degrees. For example, the third angle (θ3) between the first tilt line (TL1) and the first straight line (SL1) of the recesses 141 or the third angle (θ3) between the second tilt line (TL2) and the second straight line (SL2) of the recesses 141 may be greater than 0 and less than 60 degrees.

[0106] According to one embodiment of the present specification, the pitch (or spacing) (L1) between the recesses 141 arranged in each of the multiple subpixels (SP) constituting one pixel may be the same or different from one another. The pitch (L1) between the recesses 141 may be the distance (or spacing) between the centers (CP) of two adjacent recesses 141.

[0107] As an example, the pitch (L1) between the recesses 141 arranged in the red subpixel, the green subpixel, the blue subpixel, and the white subpixel may be the same or different from one another. For example, the pitch (L1) between the recesses 141 arranged in the green subpixel may be different from the pitch between the recesses 141 arranged in the blue subpixel.

[0108] In other embodiments, the pitch (L1) between the recesses 141 arranged in each of the white subpixels and / or green subpixels may be different from the pitch (L1) between the recesses 141 arranged in each of the red subpixels and / or blue subpixels.

[0109] In other embodiments, the number and / or density of recesses 141 disposed in each of the red, green, blue, and white subpixels may be the same or different from one another. For example, the number and / or density of recesses 141 disposed in each of the white and / or green subpixels may be different from the number and / or density of recesses 141 disposed in each of the red and / or blue subpixels.

[0110] An organic light emitting display device according to one embodiment of the present specification has a light extraction pattern 140 having a structure rotated (or horizontally rotated) at a preset angle around an arbitrary reference point. Therefore, external light incident from the outside is reflected inside the organic light emitting display device, and the diffraction pattern caused by the constructive interference of the reflected light is canceled out by the light extraction patterns 140 having different rotation angles, thereby minimizing the pattern. Alternatively, the irregularity or randomness of the rotation angle of the light extraction pattern 140 may further amplify the destructive interference, thereby suppressing or minimizing the occurrence of a rainbow pattern in the radiation form of the reflected light.

[0111] In an organic light emitting display device according to another embodiment of the present specification, the occurrence of rainbow unevenness can be reduced or minimized, and therefore, the deterioration of black visual perception characteristics caused by reflection of external light in a non-driven or off state can be reduced, thereby realizing true black.

[0112] In the following, several embodiments for setting the rotation angle of the light extraction pattern 140 within the display area (AA) will be described.

[0113] 5 to 7B, a display area AA of an organic light emitting display device according to another embodiment of the present specification may include a plurality of pixel blocks PB[1,1] to PB[n,m].

[0114] The display area (AA) may be divided or blocked into n×m pixel blocks (PB[1,1] to PB[n,m]). The pixel blocks (PB[1,1] to PB[n,m]) may be arranged in the display area (AA) along n rows and m columns. The rotation angles of the light extraction patterns 140 arranged in each of the pixel blocks (PB[1,1] to PB[n,m]) for each pixel block may be different, but the different angles may be set irregularly or randomly.

[0115] For example, among a plurality of pixel blocks (PB[1,1] to PB[n,m]), the rotation angle of each pixel block of the light extraction pattern 140 arranged in a pixel block immediately adjacent to the pixel block along any one of the first direction, the second direction, and the diagonal direction may be asymmetric, irregular, or random.

[0116] Among the plurality of pixel blocks (PB[1,1] to PB[n,m]), the rotation angles of the light extraction patterns 140 arranged in the pixel blocks directly adjacent to each other along any one of the first direction, the second direction, and the diagonal direction for each pixel block may have a difference of 1 degree or more or 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

[0117] Among the multiple pixel blocks (PB[1,1] to PB[n,m]), some of the rotation angles for each pixel block of the light extraction pattern 140 arranged in a pixel block that is not immediately adjacent along any one of the first direction, the second direction, and the diagonal direction may be 0 degrees or the same.

[0118] In another embodiment, referring to FIG. 6, each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) may include a plurality of pixel groups (PG[1,1] to PG[i,j]) of i×j (or i rows and j columns).

[0119] For example, each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) can include, but is not limited to, 20 pixel groups each consisting of a 5x4 matrix.

[0120] Each of the multiple pixel groups (PG[1,1] to PG[i,j]) may be composed of one pixel (P). For example, multiple pixels (P) arranged in the display area (AA) may be grouped (or blocked) and included in each of the multiple pixel groups (PG[1,1] to PG[i,j]).

[0121] One or more of the light extraction patterns 140 arranged in each pixel (P) of a plurality of pixel groups (PG[1,1] to PG[i,j]) may be configured to be rotated by a preset angle around an arbitrary reference point within the corresponding pixel (P). The rotation angle of the light extraction pattern 140 arranged in each of a plurality of sub-pixels (SP) constituting one pixel (P) may be a pixel-specific rotation angle.

[0122] For example, the rotation angle of the light extraction pattern 140 for each pixel is set to the same angle for each of the sub-pixels (SP) constituting one pixel (P). Therefore, the rotation angles of the light extraction patterns 140 for each pixel (P) may be different from each other, but the rotation angles of the light extraction patterns 140 for each of the sub-pixels (SP) within the pixel (P) may be the same (see FIG. 9).

[0123] As an example, the rotation angles of the light extraction patterns 140 arranged in each of the i×j pixel groups (PG[1,1] to PG[i,j]) included in the 1×1 pixel block (PB[1,1]) may be within a range of 0 degrees or more and less than 60 degrees, with a difference of 1 degree or more or 3 degrees or more from each other.

[0124] For example, the rotation angles of the light extraction patterns 140 arranged in one or more non-adjacent pixel groups (PG[1,1] to PG[i,j]) included in a 1×1 pixel block (PB[1,1]) may be 0 degrees or the same, and the rotation angles of the light extraction patterns 140 arranged in the remaining pixels may be set irregularly or randomly within a range of greater than 0 degrees and less than 60 degrees. The rotation angles of the light extraction patterns 140 arranged in each of the i×j pixel groups (PG[1,1] to PG[i,j]) corresponding to one pixel block (PB[1,1] to PB[n,m]) may be set to differ by 1 degree or more or 3 degrees or more within a range of greater than 0 degrees and less than 60 degrees along any one of the first direction, the second direction, and the diagonal direction.

[0125] According to another embodiment, the rotation angle of each pixel of the light extraction pattern 140 arranged in each of the i×j pixel groups (PG[1,1] to PG[i,j]) corresponding to one pixel block (PB[1,1] to PB[n,m]) can be set to satisfy the following conditions 1 to 6 within a range of 0 degrees or more and less than 60 degrees.

[0126] Condition 1) The rotation angles of the light extraction patterns 140 arranged in each of the i×j pixel groups (PG[1,1] to PG[i,j]) for each pixel have irregularity or randomness.

[0127] Condition 2): The rotation angles of the light extraction patterns 140 arranged in each of two pixel groups (PG[1,1] to PG[i,j]) that are directly adjacent along any one of the first direction, the second direction, and the diagonal direction have a difference of 1 degree or more or a difference of 3 degrees or more.

[0128] Condition 3): The rotation angle of each pixel of the light extraction pattern 140 arranged in a pixel group (PG[1,1] to PG[i,j]) that is not directly adjacent along any one of the first direction, the second direction, and the diagonal direction may be 0 degrees.

[0129] Condition 4): Two or more adjacent pixel groups (PG[1,1] to PG[i,j]) in which the pixel-by-pixel rotation angle of the light extraction pattern 140 differs by 1 degree or more or by 3 degrees or more are arranged between pixel groups (PG[1,1] to PG[i,j]) in which the pixel-by-pixel rotation angle of the light extraction pattern 140 is 0 degrees.

[0130] Condition 5): The rotation angles of the light extraction patterns 140 arranged in pixel groups (PG[1,1] to PG[i,j]) that are not directly adjacent along any one of the first direction, the second direction, and the diagonal direction may be the same for each pixel.

[0131] Condition 6) Two or more adjacent pixel groups (PG[1,1] to PG[i,j]) in which the rotation angles of the individual pixels of the light extraction pattern 140 differ by 1 degree or more or by 3 degrees or more are arranged between pixel groups (PG[1,1] to PG[i,j]) in which the rotation angles of the individual pixels of the light extraction pattern 140 are the same.

[0132] As shown in Figures 7A and 7B, in a 1x1 (or 1 row, 1 column) pixel block (PB[1,1]), the rotation angle (θ3) of the light extraction pattern 140 arranged in a 1xj (or 1 row, j column) pixel group (PG[1,j]) may be different from the rotation angle (θ3) of the light extraction pattern 140 arranged in a 2xj (or 2 rows, j columns) pixel group (PG[2,j]).

[0133] For example, the rotation angle (θ3) of the light extraction pattern 140 arranged in the pixel group (PG[1,j]) of 1×j (or 1 row, j column) can have a difference of 1 degree or more or a difference of 3 degrees or more from the rotation angle (θ3) of the light extraction pattern 140 arranged in the pixel group (PG[2,j]) of 2×j (or 2 rows, j column). For example, the rotation angle (θ3) of the light extraction pattern 140 arranged in the pixel group (PG[1,j]) of 1×j (or 1 row, j column) can be 5 degrees. The rotation angle (θ3) of the light extraction pattern 140 arranged in the pixel group (PG[2,j]) of 2×j (or 2 rows, j column) can be 15 degrees.

[0134] Therefore, in an organic light emitting display device according to another embodiment of the present specification, the rotation angle of each pixel block of the light extraction patterns 140 arranged in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) is set to be different from the rotation angle of each pixel group of the light extraction patterns 140 arranged in each of the plurality of pixel groups (PG[1,1] to PG[i,j]) included in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]). By setting the different rotation angles randomly, diffraction patterns of reflected light generated by reflected light in the light extraction patterns 140 arranged in each of the plurality of pixels (P) can be canceled or minimized.

[0135] In addition, in the organic light emitting display device according to other embodiments of the present specification, the irregularity or randomness of the light extraction pattern 140 for each pixel (P) can increase destructive interference, and the occurrence of a rainbow pattern in the form of radiation of reflected light and a circular ring pattern in the form of radiation can be suppressed or minimized. As a result, the deterioration of black visual perception characteristics caused by the reflection of external light in a non-driven or off state can be reduced, thereby realizing true black.

[0136] 8A, each of the pixel groups (PG[1,1] to PG[x,y]) included in one pixel block (PB[1,1]) may include four or more (or two or more) pixels (P). For example, among the pixels (P), four pixels (P) adjacent to each other along the first direction (X) may be grouped into one pixel group.

[0137] According to one embodiment, in each of the plurality of pixel groups (PG[1,1] to PG[x,y]), the light extraction patterns 140 arranged in each of the four pixels (P) have a structure rotated by a preset angle around an arbitrary reference point in the corresponding pixel (P). For example, in each of the plurality of pixel groups (PG[1,1] to PG[x,y]), the light extraction patterns 140 arranged in each of the plurality of sub-pixels included in each of the four pixels (P) may be configured to be rotated by a preset angle around the center of any one of the recesses 141 in the corresponding sub-pixel.

[0138] The rotation angles of the light extraction patterns 140 arranged in each of the pixel groups (PG[1,1] to PG[x,y]) for each pixel group can be set in the same manner as in the embodiment for setting the rotation angles for each pixel group described above with reference to Figures 6 to 7B, and the description thereof will be omitted. That is, the rotation angles of the light extraction patterns 140 arranged in each of the pixel groups (PG[1,1] to PG[x,y]) for each pixel group can be set in the same manner as in the embodiment described with reference to Figures 6 to 7B.

[0139] In another embodiment of the present specification, the rotation angle of each pixel block of the light extraction patterns 140 arranged in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) and the rotation angle of each pixel group of the light extraction patterns 140 arranged in each of the plurality of pixel groups (PG[1,1] to PG[x,y]) included in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) are set to be different, and the different angles are set randomly, so that external light enters the interior of the organic light emitting display device, and the diffraction pattern of the reflected light generated when the incident light is reflected by the light extraction patterns 140 of each of the plurality of pixels (P) can be canceled or minimized.

[0140] In addition, in organic light-emitting display devices according to other embodiments of the present specification, the irregularity or randomness of the light extraction pattern 140 can increase destructive interference, and the occurrence of rainbow patterns and radial circular ring patterns can be suppressed or minimized, thereby reducing the deterioration of black visual perception characteristics caused by reflection of external light in a non-driven or off state, thereby achieving true black.

[0141] 8B , in an organic light emitting display device according to another embodiment of the present disclosure, one pixel block (PB[1,1]) may include a plurality of pixel groups (PG[1,1] to PG[x,y]). A plurality of sub-pixels (SP) may be grouped (or blocked) into g×h (or g rows and h columns) and included in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]).

[0142] According to one embodiment, in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]), the light extraction patterns 140 arranged in each of the plurality of sub-pixels (SP) have a structure rotated by a predetermined angle around an arbitrary reference point in the corresponding sub-pixel (SP). The light extraction patterns 140 arranged in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) included in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) may be different from each other.

[0143] The rotation angle of each subpixel of the light extraction pattern 140 arranged in each of the g×h subpixels (SP[1,1] to SP[g,h]) corresponding to one pixel block (PB[1,1] to PB[n,m]) can be set to differ by more than 1 degree or more than 3 degrees within the range of more than 0 degrees and less than 60 degrees.

[0144] For example, the rotation angles of the light extraction patterns 140 arranged in each of the g×h subpixels (SP[1,1] to SP[g,h]) included in the 1×1 pixel block (PB[1,1]) may differ by 1 degree or more or by 3 degrees or more. The rotation angles of the light extraction patterns 140 arranged in one or more non-adjacent subpixels among the g×h subpixels (SP[1,1] to SP[g,h]) included in the 1×1 pixel block (PB[1,1]) may be 0 degrees or the same, and the rotation angles of the light extraction patterns 140 arranged in the remaining subpixels may be set irregularly or randomly within a range of more than 0 degrees and less than 60 degrees.

[0145] The rotation angle of each subpixel of the light extraction pattern 140 arranged in each of the g × h subpixels (SP[1,1] to SP[g,h]) corresponding to one pixel block (PB[1,1] to PB[n,m]) can be set to differ by 1 degree or more or 3 degrees or more within a range of 0 degrees or more and less than 60 degrees along any one of the first direction, the second direction, and the diagonal direction.

[0146] In another embodiment of the organic light emitting display device according to the present specification, the rotation angles of the light extraction patterns 140 arranged in each of the g×h sub-pixels (SP[1,1] to SP[g, h]) arranged in each of the pixel blocks (PB[1,1] to PB[n, m]) are set to be different from the rotation angles of the light extraction patterns 140 of the sub-pixels (SP[1,1] to SP[g, h]) included in each of the pixel blocks (PB[1,1] to PB[n, m]). The different angles are set randomly, so that external light enters the organic light emitting display device, and diffraction patterns of the reflected light generated by the light extraction patterns 140 arranged in each of the sub-pixels (SP) can be canceled or minimized.

[0147] In addition, in the organic light emitting display device according to other embodiments of the present specification, the irregularity or randomness of the light extraction pattern 140 for each subpixel (SP) can increase destructive interference, and the occurrence of a rainbow pattern in the form of radiation of reflected light and a circular ring pattern in the form of radiation can be suppressed or minimized. As a result, the deterioration of black visual perception characteristics caused by the reflection of external light in a non-driven or off state can be reduced, thereby realizing true black.

[0148] 9, an organic light emitting display device according to another embodiment of the present specification includes g×h sub-pixels (SP[1,1] to SP[g,h]), where four sub-pixels (SP) constitute one pixel (P), and the light extraction patterns 140 arranged in units of one pixel (P) may be configured to be rotated at a preset angle around an arbitrary reference point within the pixel (P). The light extraction patterns 140 arranged in one pixel (P) may be configured to be rotated at a rotation angle greater than 0 degrees and less than 60 degrees around an arbitrary reference point.

[0149] For example, the rotation angle of the light extraction pattern 140 disposed in each of the plurality of pixels (P) may be set irregularly or randomly along one or more of the first direction and the second direction within a range greater than 0 degrees and less than 60 degrees. The arbitrary reference point may be any position within the pixel or the center (CP) of any one of the plurality of recesses 141.

[0150] The first to fourth sub-pixels SP1 to SP4 of a pixel P may be configured to be rotated (or horizontally rotated) or reversely rotated (or horizontally reverse rotated) at a preset angle around an arbitrary reference point. The light extraction patterns 140 disposed in two adjacent pixels P among the plurality of pixels P may have different rotation angles.

[0151] For example, the rotation angles of the light extraction patterns 140 arranged in the first to fourth subpixels (SP[1,1] to SP[1,4]) of the first row belonging to one pixel (P) arranged in one row are the same, and the rotation angles of the light extraction patterns 140 arranged in the first to fourth subpixels (SP[2,1] to SP[2,4]) of the second row belonging to one pixel (P) arranged in two rows are the same, but the rotation angle of the light extraction pattern 140 in the first to fourth subpixels (SP[1,1] to SP[1,4]) of the first row or any one of the first to fourth subpixels (SP[1,1] to SP[1,4]) of the first row is different from the rotation angle of the light extraction pattern 140 in the first to fourth subpixels (SP[2,1] to SP[2,4]) of the second row or any one of the first to fourth subpixels (SP[2,1] to SP[2,4]) of the second row.

[0152] According to one embodiment of the present specification, the rotation angles of the light extraction patterns 140 arranged in two adjacent pixels (P) among a plurality of pixels (P) may differ by one degree or more. The rotation angles of the light extraction patterns 140 arranged in two adjacent patterns (P) along one or more of the first direction (X) and the second direction (Y) may differ by one degree or more. For example, the rotation angles of the light extraction patterns 140 arranged in two adjacent patterns (P) in all directions may differ by one degree or more.

[0153] For example, among multiple pixels (P), the light extraction pattern 140 arranged in any first pixel (P) may be configured in a non-rotated structure, and the light extraction pattern 140 arranged in a second pixel (P) adjacent to the first pixel (P) may be configured to have a rotation angle of 1 degree or more or 3 degrees or more.

[0154] Depending on the difference in rotation angle of the light extraction patterns 140 arranged in each of the adjacent pixels (P), the diffraction patterns (or diffraction pattern distributions) of the radiation form caused by the reflected light generated in each of the two adjacent pixels (P) are canceled or minimized, or the cancellation effect is increased due to irregularity or randomness, thereby preventing the rainbow phenomenon. As a result, the deterioration of the black luminance characteristic caused by the reflection of external light in the non-driven or off state is reduced, and true black can be achieved.

[0155] Referring to FIG. 10, an organic light emitting display device according to another embodiment of the present specification includes g×h sub-pixels (SP[1,1] to SP[g,h]), and the light extraction patterns 140 arranged for each sub-pixel (SP) may be configured to be rotated at a preset angle around an arbitrary reference point within the corresponding sub-pixel.

[0156] The rotation angles of the light extraction patterns 140 arranged in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) may be different from each other. The rotation angle of the light extraction patterns 140 arranged in each of the plurality of sub-pixels (SP) may refer to the rotation angle of the light extraction patterns 140 for each sub-pixel.

[0157] Specifically, the rotation angles of the light extraction patterns 140 arranged in each of the g×h subpixels (SP[1,1] to SP[g,h]) may differ from each other by 1 degree or more, or by 3 degrees or more. The rotation angles of the light extraction patterns 140 arranged in one or more non-adjacent subpixels among the g×h subpixels (SP[1,1] to SP[g,h]) may be 0 degrees or the same, and the rotation angles of the light extraction patterns 140 arranged in the remaining subpixels may be set irregularly or randomly within a range of more than 0 degrees and less than 60 degrees.

[0158] According to one embodiment, the rotation angle of each of the g×h sub-pixels (SP[1,1] to SP[g,h]) of the light extraction patterns 140 may be set to differ by 1 degree or more or 3 degrees or more within a range of 0 degrees or more and less than 60 degrees along any one of the first direction, the second direction, and the diagonal direction.

[0159] For example, the rotation angles of the first to fourth light extraction patterns 140a to 140d arranged in the four subpixels (SP[1,1] to SP[1,4]) may be set to differ by 1 degree or more or 3 degrees or more within a range of 0 degrees to 60 degrees. The rotation angle of the first light extraction pattern 140a of the first subpixel (SP[1,1]) may be 60 degrees or 0 degrees (no rotation). The rotation angle of the second light extraction pattern 140b arranged in the second subpixel (SP[1,2]) may be 57 degrees. The rotation angle of the third light extraction pattern 140c arranged in the third subpixel (SP[1,3]) may be 53 degrees. The rotation angle of the fourth light extraction pattern 140d arranged in the fourth subpixel (SP[1,4]) may be 49 degrees.

[0160] According to another embodiment, the rotation angle of each subpixel of the light extraction pattern 140 arranged in each of the g×h subpixels (SP[1,1] to SP[g,h]) can be set to be greater than or equal to 0 degrees and less than 60 degrees so as to satisfy the following conditions 1 to 6.

[0161] Condition 1) The rotation angles of the light extraction patterns 140 arranged in the g×h sub-pixels (SP[1,1] to SP[g,h]) are irregular or random.

[0162] Condition 2): The rotation angles of the light extraction patterns 140 of two subpixels (SP[1,1] to SP[g,h]) that are directly adjacent along any one of the first direction, the second direction, and the diagonal direction have a difference of 1 degree or more or a difference of 3 degrees or more.

[0163] Condition 3): The rotation angle of each subpixel of the light extraction pattern 140 arranged in a subpixel (SP[1,1] to SP[g,h]) that is not directly adjacent along any one of the first direction, the second direction, and the diagonal direction may be 0 degrees.

[0164] Condition 4) Two or more adjacent subpixels (SP[1,1] to SP[g,h]) whose subpixel rotation angles of the light extraction pattern 140 differ by 1 degree or more or by 3 degrees or more are arranged between subpixels (SP[1,1] to SP[g,h]) whose subpixel rotation angles of the light extraction pattern 140 are 0 degrees.

[0165] Condition 5): The rotation angles of the light extraction patterns 140 arranged in subpixels (SP[1,1] to SP[g,h]) that are not directly adjacent to each other along any one of the first direction, the second direction, and the diagonal direction may be the same for each subpixel.

[0166] Condition 6) Two or more adjacent subpixels (SP[1,1] to SP[g,h]) whose rotation angles of the light extraction pattern 140 differ by 1 degree or more or by 3 degrees or more are arranged between subpixels (SP[1,1] to SP[g,h]) whose rotation angles of the light extraction pattern 140 are the same.

[0167] According to one embodiment of the present specification, the rotation angles of each subpixel of the light extraction pattern 140 arranged in each of the g×h subpixels (SP[1,1] to SP[g,h]) may be different or randomly set.

[0168] For example, among g×h subpixels (SP[1,1] to SP[g,h]), the rotation angle of each subpixel of the light extraction pattern 140 arranged in the subpixel (SP) directly adjacent to the first direction, the second direction, or the diagonal direction may be asymmetric, irregular, or random.

[0169] For example, among the g×h subpixels (SP[1,1] to SP[g,h]), some of the rotation angles of the light extraction patterns 140 arranged in subpixels (SP) that are not directly adjacent along any one of the first direction, the second direction, and the diagonal direction may be 0 degrees or the same.

[0170] Therefore, in the organic light emitting display device according to other embodiments of the present specification, incident external light is reflected inside the organic light emitting display device, and the diffraction patterns of the reflected light are canceled out and minimized by the rotated angles of the light extraction patterns 140 of each of the plurality of sub-pixels (SP), or the effect of destructive interference is further increased by the irregularity or randomness of the rotation angles of each sub-pixel (SP), so the occurrence of rainbow unevenness in the radiation form of the reflected light and circular ring patterns in the radiation form can be suppressed or minimized.

[0171] In the organic light emitting display device according to other embodiments of the present specification, the occurrence of rainbow unevenness can be reduced or minimized, and therefore the deterioration of black visual perception characteristics caused by the reflection of external light in a non-driven or off state can be reduced, thereby realizing true black.

[0172] 11 is a diagram illustrating one pixel in an organic light emitting display device according to another embodiment of the present specification. In the following description, duplicated explanations of the same reference numerals as above will be omitted.

[0173] 11, an organic light emitting display device according to another embodiment of the present disclosure includes a plurality of subpixels (SP1, SP2, SP3, and SP4). Each subpixel (SP) includes a plurality of light extraction patterns 240, 240a, 240b, 240c, and 240d in an emission area (EA) defined by a bank layer 290. The rotation angles of the light extraction patterns 240a, 240a, 240b, 240c, and 240d of the subpixels (SP1 to SP4) are different from one another. Here, the different rotation angles of the light extraction patterns 240a, 240a, 240b, 240c, and 240d are set randomly. The light extraction patterns 240 (240a, 240b, 240c, and 240d) include a plurality of recesses 241 and a plurality of protrusions 243 respectively disposed between or adjacent to the recesses 241. The protrusions 243 and recesses 241 are connected to each other, and a plurality of them can be arranged alternately.

[0174] Specifically, adjacent first to fourth subpixels (SP1 to SP4) belonging to one pixel (P) include a first subpixel (SP1), a second subpixel (SP2), a third subpixel (SP3), and a fourth subpixel (SP4) that emit different colors. The first subpixel (SP1) may be a red subpixel, the second subpixel (SP2) may be a white subpixel, the third subpixel (SP3) may be a blue subpixel, and the fourth subpixel (SP4) may be a green subpixel. The light-emitting areas (EA) of the first to fourth subpixels (SP1 to SP4) may have different sizes (or areas).

[0175] The rotation angles (θ6, θ7, θ8, θ9) of the first to fourth light extraction patterns 240a to 240d arranged in the first to fourth sub-pixels (SP1 to SP4) differ from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees. Here, the rotation angles are based on a line connecting the centers of the recesses 241 of the light extraction patterns 240.

[0176] Specifically, the rotation angles of the first light extraction pattern 240a arranged in the first sub-pixel SP1 and the second light extraction pattern 240b arranged in the adjacent second sub-pixel SP2 differ by 3 degrees or more. The rotation angles of the second light extraction pattern 240b arranged in the second sub-pixel SP2 and the third light extraction pattern 240c arranged in the adjacent third sub-pixel SP3 differ by 3 degrees or more. The rotation angles of the third light extraction pattern 240c arranged in the third sub-pixel SP3 and the fourth light extraction pattern 240d arranged in the adjacent fourth sub-pixel SP4 differ by 3 degrees or more.

[0177] For example, the rotation angle (θ6) of the first light extraction pattern 240a formed in the first sub-pixel (SP1) may be 60 degrees or 0 degrees (no rotation). The rotation angle (θ7) of the second light extraction pattern 240b formed in the second sub-pixel (SP2) may be 57 degrees. The rotation angle (θ8) of the third light extraction pattern 240c formed in the third sub-pixel (SP3) may be 54 degrees or 53 degrees. When the rotation angle (θ8) of the third light extraction pattern 240c formed in the third sub-pixel (SP3) is 54 degrees, the rotation angle (θ9) of the fourth light extraction pattern 240d formed in the fourth sub-pixel (SP4) may be 51 degrees or 49 degrees. When the rotation angle (θ8) of the third light extraction pattern 240c configured in the third subpixel (SP3) is 53 degrees, the rotation angle (θ9) of the fourth light extraction pattern 240d configured in the fourth subpixel (SP4) may be 50 degrees or less than 50 degrees.

[0178] The outermost patterns of the light extraction patterns 240a to 240d arranged in each light emitting area (EA) are arranged outside the light emitting area (EA) and overlap with the bank layer 290. Here, the outermost patterns have a rotated angle, but the angle is the same as that of the light extraction patterns 240 in the light emitting area (EA) for each subpixel (SP).

[0179] 12, the light extraction patterns 240 of the sub-pixels (SP[1,1] to SP[g,h]) in the display area (AA) are arranged so that the rotation angles between sub-pixels of the same color are greater than 0 degrees and less than 60 degrees, with a difference of 3 degrees or more. The rotation angles are based on a line connecting the centers of the recesses 241 of the light extraction patterns 240.

[0180] The rotation angle of each subpixel of the light extraction pattern 240 arranged in each of the g × h subpixels (SP[1,1] to SP[g,h]) in the display area (AA) is set to differ by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees along any one of the first direction which is the short side direction of the display area (AA), the second direction which is the long side direction of the display area (AA), and the diagonal direction, and the set angle has randomness.

[0181] For example, if g×h subpixels (SP[1,1] to SP[g,h]) are arranged in the display area (AA) and subpixels of the same color are arranged in the column direction, the first subpixel (SP[g,1]) in row g, which is a subpixel of the same color as the first subpixel (SP[1,1]), is not adjacent to each other but is spaced apart, and the rotation angles of the first subpixel (SP[1,1]) and the first subpixel (SP[g,1]) in row g are set to differ by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees, and the set rotation angles have randomness.

[0182] The rotation angle of the light extraction pattern 240 can be applied by combining the settings of the rotation angle of the light extraction pattern in the display area (AA) in the other embodiments previously described with reference to FIGS.

[0183] Therefore, in the organic light emitting display device according to another embodiment of the present specification, incident external light is reflected inside the organic light emitting display device, and the diffraction patterns of the reflected light are canceled out and minimized due to the rotated angles of the light extraction patterns 140 of each of the plurality of sub-pixels (SP), or the effect of destructive interference is further increased due to the irregularity or randomness of the rotation angles of each sub-pixel (SP), so that the occurrence of rainbow unevenness in the radiation form of reflected light and circular ring patterns in the radiation form can be suppressed or minimized. Since the organic light emitting display device according to another embodiment of the present specification can reduce or minimize the occurrence of rainbow unevenness, the deterioration of black luminance characteristics caused by the reflection of external light in a non-driven or off state can be reduced, and true black can be achieved.

[0184] The color filter layer 250 disposed between the light extraction pattern 240 and the substrate 100 may have a size larger than the light emitting area (EA), as shown in Figures 11 and 13. Since the color filter layer 250 is larger than the light emitting area (EA), it may have an area larger than the area where the plurality of light extraction patterns 240 are disposed in each subpixel (SP) except for the white subpixel.

[0185] When the color filter layer 250 is wider than the light extraction pattern 240, the occurrence of light leakage, in which internal light leaks to adjacent sub-pixels (SP), can be reduced.

[0186] The color filter layer 250 is disposed to extend to a part of the circuit area (CA) so as to overlap with the first electrode (E1) connected to the circuit area (CA). The color filter layer 250 corresponding to one subpixel (SP) may be disposed to extend to a part of the circuit area (CA) of another adjacent or neighboring subpixel (SP).

[0187] For example, if the first subpixel (SP1) is a red subpixel, the second subpixel (SP2) is a blue subpixel, the third subpixel (SP3) is a white subpixel, and the fourth subpixel (SP4) is a green subpixel, the second color filter layer 250B corresponding to the blue second subpixel (SP2) may be arranged up to a part of the circuit area (CA) of the second subpixel (SP2) so as to overlap with the connecting portion 222 of the first electrode (E1) arranged between the light-emitting area (EA) and the circuit area (CA) of the second subpixel (SP2), and may be arranged up to a part of the circuit area (CA) of the third and fourth subpixels (SP3 and SP4) so as to overlap with the connecting portion 222 of the first electrode (E1) arranged between the light-emitting area (EA) and the circuit area (CA) of the adjacent third and fourth subpixels (SP3 and SP4).

[0188] The second color filter layer 250B corresponding to the blue second subpixel (SP2) may be arranged up to a portion of the circuit area (CA) of the first subpixel (SP1) so as to overlap with the connecting portion 222 of the first electrode (E1) arranged between the light-emitting area (EA) and the circuit area (CA) of the first subpixel (SP1).

[0189] In another embodiment, the first color filter layer 250A corresponding to the red first subpixel (SP1) may be arranged up to a portion of the circuit area (CA) of the first subpixel (SP1) so as to overlap with the connecting portion 222 of the first electrode (E1) arranged between the light-emitting area (EA) and the circuit area (CA) of the first subpixel (SP1).

[0190] In another example, the third color filter layer 250D corresponding to the green fourth subpixel (SP4) may be arranged up to a portion of the circuit area (CA) of the fourth subpixel (SP4) so as to overlap with the connecting portion 222 of the first electrode (E1) arranged between the light-emitting area EA and the circuit area (CA) of the fourth subpixel (SP4).

[0191] 14, when the color filter layer 250 is arranged to overlap the connecting portion 222 of the first electrode (E1) arranged between the light emitting area (EA) and the circuit area (CA), the connecting portion 222 of the first electrode (E1) can be used as a repair portion to repair the subpixel (SP) when a bright spot or dark spot occurs, thereby improving driving reliability. For example, the connecting portion 222 of the first electrode (E1) electrically connected to the driving thin film transistor (Tdr) can be used as the repair portion.

[0192] When the blue color filter layer 250B is arranged to overlap the connection portion 222 of the first electrode (E1) arranged between the light-emitting area (EA) and the circuit area (CA) of an adjacent or neighboring subpixel (SP), the blue color filter layer 250B, which has a relatively short wavelength, can block laser light having a relatively long wavelength when laser repair is applied, thereby preventing or minimizing damage to surrounding layers caused by the laser light during repair.

[0193] The bank layer 290 defining the light emitting areas (EA) may be disposed between the light emitting areas (EA) of the light extraction pattern 240 having a rotated structure so as to cover the edges of the first electrode (E1). The bank layer 290 is disposed between the light emitting areas (EA) so as to overlap with the underlying wirings (PL, DL, RL).

[0194] The bank layer 290 may be made of an opaque material or a photosensitive material containing a black pigment. The bank layer 290 may include benzocyclobutene (BCB)-based resin, acrylic-based resin, polyimide resin, etc. If the bank layer 290 includes an opaque material or a black pigment, it may be called a black bank layer. When the bank layer 290 is a black bank layer, it acts as a light-blocking member between the light-emitting areas (EA) of adjacent subpixels (SP) and can prevent or minimize light scattered internally from being reflected and transmitted to adjacent or neighboring subpixels (SP).

[0195] When the bank layer 290 is disposed between adjacent light-emitting areas (EA) on the black bank layer, it can block the internal light path, eliminating the need to place a separate light-blocking structure between adjacent light-emitting areas (EA), and reducing the occurrence of steps between stacked layers.

[0196] Therefore, in an organic light emitting display device according to another embodiment of the present invention, the bank layer 290 is disposed between the light emitting areas (EA) as a black bank layer, thereby increasing or widening the boundaries of the light emitting areas (EA) and improving the aperture ratio.

[0197] The bank layer 290 is a black bank layer and is disposed between the light emitting area (EA) and the circuit area (CA) of one subpixel (SP) so as to overlap the connection portion 222 of the first electrode (E1) connecting the light emitting area (EA) and the circuit area (CA). When the connection portion 222 is applied to the repair portion, the bank layer 290 to which the black bank layer is applied can minimize damage to the light emitting element (EP) during laser repair.

[0198] The bank layer 290 is disposed as a black bank layer so as to overlap the outermost light extraction pattern 240 of the light extraction pattern 240 having a rotated structure. The outermost light extraction pattern 240 also has a rotated structure. The bank layer 290 is disposed as a black bank layer between the light extraction patterns 240 having different rotation angles for each adjacent sub-pixel (SP).

[0199] Various lights within the display device may be generated through various scattering angles, as shown in Figure 15. For example, when external light enters the substrate 100, reflected light may be generated by the recesses 241 and protrusions 243 of the light extraction pattern 240, or may be generated due to differences in the refractive index of various layers (e.g., 110, 117, 130, 250, and 170) within the substrate 100. The light generated through such various scattering angles is prevented from being transferred to adjacent subpixels by the bank layer 290, which is a black bank layer disposed between the light extraction patterns 240 having a rotated structure. Therefore, the organic light emitting display device according to the present disclosure may prevent or improve color paleness (see Figure 16A) and may have improved image quality, as shown in the photograph of Figure 16B.

[0200] The color fading phenomenon may occur more frequently due to the movement of light to adjacent subpixels where the color filter layer 250 is not disposed. However, in the case of an organic light emitting display device according to another embodiment of the present specification, as shown in Figures 13 and 15, by disposing a bank layer 290, which is a black bank layer, between a subpixel (e.g., SP3) where the color filter layer 250 is not disposed (or not yet disposed) and a subpixel (e.g., SP2) where the color filter layer 250 is disposed, the amount of reflected light absorbed or reflected by the bank layer 290, which is a black bank layer, can be reduced, and the movement of light to subpixels (e.g., SP3) where the color filter layer 250 is not disposed can be minimized or prevented, thereby improving the color fading phenomenon.

[0201] As described above, the light extraction pattern 240 having a rotated structure arranged in the light emitting area (EA) has irregularity or randomness, which can cancel or minimize the constructive interference of light concentration, thereby preventing rainbow unevenness (see FIG. 17A). However, in another embodiment of the present invention, an organic light emitting display device can prevent or further minimize light concentration by arranging a bank layer 290 as a black bank layer between the light emitting areas (EA) of the light extraction pattern 240 having a rotated structure, and can also prevent the pearl phenomenon (see FIG. 17B), which appears whitish in places due to the multiple interference of various scattered lights.

[0202] Therefore, in another embodiment of the organic light emitting display device of the present invention, a black bank layer is disposed as a bank layer 290 between light emitting areas (EA) including light extraction patterns 240 having a rotated structure, thereby blocking light from moving to adjacent subpixels (SP) or light emitting areas (EA), thereby improving the aperture ratio and color paleness at the same time.

[0203] In addition, in an organic light emitting display device according to another embodiment of the present invention, a black bank layer is disposed as a bank layer 290 between light emitting areas (EA) including light extraction patterns 240 having an irregularly rotated structure. This prevents various scattered lights generated through various paths, such as internal reflection of external light entering the organic light emitting display device and reflection due to differences in the refractive index of internal light, from concentrating into constructive interference or canceling each other out, thereby minimizing multiple interference and preventing rainbow-like phenomena as shown in the photograph of FIG. 17C, as well as speckle and pearl phenomena.

[0204] The organic light emitting display device according to the embodiments of the present specification can improve light extraction efficiency and suppress or minimize the occurrence of a radiating rainbow pattern and a radiating circular ring pattern due to the internal offset of reflected light, thereby improving black luminance characteristics. As a result, the organic light emitting display device according to the embodiments of the present specification can realize high efficiency and high brightness, thereby extending the life of the light emitting element (or organic light emitting element) and reducing power consumption, thereby realizing low power consumption.

[0205] The above description has focused on the embodiments, but these are merely examples and do not limit the present invention. The present specification described above is not limited to the above embodiments and the accompanying drawings. The features, structures, effects, etc. exemplified in each embodiment can be combined or modified. Therefore, the contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0206] 10: Display panel 100: Substrate 150, 250: Color filter layer 140, 240: Light extraction pattern 141, 241: recess 143, 243: Convex 170: Flattening layer 190, 290: Bank layer 200: Sealing part 300: Opposing substrate

Claims

1. a substrate having a plurality of subpixels in a light-emitting region; a buffer layer disposed on the substrate; an interlayer insulating film disposed on the buffer layer; a plurality of lines disposed on the interlayer insulating film; a protective layer disposed on the plurality of lines and the interlayer insulating film; a plurality of color filter layers including a first color filter layer and a second color filter layer, each of which is arranged to correspond to a corresponding subpixel and is arranged adjacent to each other; a planarization layer disposed on the plurality of color filter layers and including a plurality of light extraction patterns having a protrusion and a plurality of recesses; a light-emitting element having a first electrode, a light-emitting layer, and a second electrode, which is disposed in each of the plurality of sub-pixels; a bank layer defining the light-emitting region of each of the plurality of sub-pixels; a sealing portion disposed on the second electrode; a counter substrate disposed on the sealing portion, the bank layer overlaps an overlapping region where the first color filter layer and the second color filter layer overlap, The organic light-emitting display device, wherein the bank layer overlaps the plurality of lines between the light-emitting regions.

2. At least one first light extraction pattern among the plurality of light extraction patterns is rotated with respect to a center of each of the plurality of recesses; 2. The organic light emitting display device of claim 1, wherein rotation angles of the light extraction patterns disposed in two adjacent subpixels among the plurality of subpixels are within a range of 0 degrees or more and less than 60 degrees, with a difference of 3 degrees or more between the rotation angles.

3. The organic light emitting display device of claim 1 , wherein the bank layer overlaps an edge of an outermost pattern of the light extraction pattern.

4. The organic light emitting display device of claim 3 , wherein the outermost pattern of the light extraction pattern in each of the light emitting regions is arranged to the outside of the light emitting region.

5. The organic light emitting display device of claim 1 , wherein the plurality of color filter layers overlap the plurality of lines between the light emitting regions.

6. The organic light-emitting display device according to claim 1 , wherein the bank layer is disposed as a black bank layer.

7. The light-emitting device further includes a driving thin film transistor disposed in a circuit region spatially separated from the light-emitting region; The organic light emitting display device of claim 1 , wherein the driving thin film transistor comprises an active layer, a gate electrode, a drain electrode, and a source electrode.

8. The organic light emitting display device of claim 1 , wherein the shape of the light extraction pattern in each of the plurality of sub-pixels has a different rotation angle for each of the plurality of sub-pixels.

9. The organic light-emitting display device according to claim 1 , wherein each of the plurality of color filter layers extends from the light-emitting region of the subpixel to a circuit region.

10. the plurality of sub-pixels includes first, second, third and fourth sub-pixels; 10. The organic light-emitting display device of claim 9, wherein a color filter layer disposed in a subpixel emitting a color with the shortest wavelength among the first to fourth subpixels extends to the circuit region of an adjacent subpixel of another color.

11. the first subpixel is a red subpixel, the second subpixel is a blue subpixel, the third subpixel is a white subpixel, and the fourth subpixel is a green subpixel; The organic light emitting display device of claim 10 , wherein the color filter layer corresponding to the second sub-pixel extends to circuit regions of the third and fourth sub-pixels.

12. For each of the subpixels, the first electrode includes a connecting portion disposed between the light-emitting region and a circuit region outside the light-emitting region; The organic light emitting display device of claim 1 , wherein the color filter layer disposed to correspond to the corresponding sub-pixel overlaps the connecting portion.

13. the plurality of sub-pixels includes first, second, third and fourth sub-pixels; 13. The organic light emitting display device of claim 12, wherein the color filter layer disposed in a subpixel emitting a color with the shortest wavelength among the first to fourth subpixels extends to and overlaps with the connecting portion of an adjacent subpixel of another color.

14. the first subpixel is a red subpixel, the second subpixel is a blue subpixel, the third subpixel is a white subpixel, and the fourth subpixel is a green subpixel; The organic light emitting display device of claim 13 , wherein the color filter layer corresponding to the second sub-pixel is disposed to overlap a connection portion of the third and fourth sub-pixels.

15. The organic light-emitting display device of claim 14 , wherein the color filter layer corresponding to the second sub-pixel extends to the circuit regions of the third and fourth sub-pixels.

16. The organic light emitting display device of claim 10 , wherein the bank layer is disposed between light extraction patterns having different rotation angles for adjacent sub-pixels.

17. The organic light emitting display device of claim 12 , wherein the black bank layer is disposed to overlap the connecting portion.

Images