Organic light-emitting display device

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] This specification relates to an organic light-emitting display device, and more specifically, to an organic light-emitting display device capable of reducing the reflectance due to external light while improving the internal light extraction efficiency.

Background Art

[0002] As the information society develops, the interest in display devices for displaying images and the demands for using them are increasing in various forms. The display field has been rapidly developing, and in response, various lightweight and thin flat panel display devices have been developed and are in the spotlight. In recent years, display devices such as liquid crystal display devices and organic light-emitting display devices have been utilized.

[0003] An organic light-emitting display device is a self-emitting display device that displays an image through the light emission of an organic light-emitting layer interposed between two electrodes. Unlike a liquid crystal display device, it does not require a separate light source such as a backlight unit and can be manufactured in a lightweight and thin form. In addition, the organic light-emitting display device is not only advantageous in terms of power consumption due to low-voltage driving but also excellent in terms of hue reproduction, response speed, viewing angle, and contrast ratio. For this reason, the organic light-emitting display device is in the spotlight as a next-generation display device.

[0004] An organic light-emitting display device expresses an image while the internal light exits the display device, and research has been continuously conducted to improve the efficiency of the internal light, and research has been carried out to improve the reflectance due to external light.

Summary of the Invention

Problems to be Solved by the Invention

[0005] This specification aims to provide a light-emitting display device capable of improving the light extraction efficiency of emitted light when displaying an image while the light emitted from the light-emitting layer of the organic light-emitting display device exits to the outside, as a technical problem.

[0006] Further, this specification can minimize the occurrence of black floating or reflection visual sensation due to external light reflection, and can improve the reflection of external light, so that the light is minimally reflected internally and re-emitted, or the reflectance is increased by the reflective electrode and re-emitted. It aims to provide an organic light-emitting display device that can minimize or reduce the occurrence of Rainbow Mura and Pearl phenomena as a technical problem.

[0007] Also, this specification aims to provide an organic light-emitting display device that can minimize or reduce the occurrence of ring mura (or ring pattern) and / or pearl mura (or pearl pattern) generated by the scattering of light generated inside the organic light-emitting display device and / or light incident from the outside.

[0008] Furthermore, this specification aims 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 the color paleness phenomenon caused by various scattered lights that can occur inside.

[0009] This specification aims to provide an organic light-emitting display device that can improve the light extraction efficiency of the organic light-emitting display device, achieve high efficiency and high brightness, extend the lifespan of the organic light-emitting element, reduce power consumption, and enable low-power implementation as a technical problem.

[0010] The problems to be 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 those with ordinary knowledge in the technical field to which the present invention belongs from the following description.

Means for Solving the Problems

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

[0012] According to an embodiment of the present specification, 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 an embodiment of the present specification, the rotation angles of the light extraction patterns disposed in two adjacent sub-pixels among the plurality of sub-pixels may differ by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees from each other.

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

[0015] According to an embodiment of the present specification, the organic light-emitting display device further includes a substrate on which a plurality of sub-pixels are disposed, a plurality of color filter layers respectively disposed so as to correspond to the corresponding sub-pixels between the substrate and the planarization layer, and a bank layer defining the light-emitting regions of the sub-pixels. Each of the plurality of color filter layers extends from the light-emitting region of the sub-pixel to the circuit region.

[0016] According to an embodiment of the present specification, the first sub-pixel is red, the second sub-pixel is blue, the third sub-pixel is white (or white), the fourth sub-pixel is a green sub-pixel, and the blue second sub-pixel may extend to the circuit regions of the third and fourth sub-pixels.

[0017] According to an embodiment of the present specification, an organic light emitting display device further includes a substrate on which a plurality of sub-pixels are arranged, a color filter layer arranged to correspond to the corresponding sub-pixels between the substrate and the planarization layer, and a light emitting element having a first electrode, a light emitting layer, and a second electrode arranged in the plurality of sub-pixels. The first electrode is arranged in each light emitting region of the sub-pixels. For each of the sub-pixels, the second electrode includes a connection portion arranged between the light emitting region and a circuit region outside the light emitting region. The color filter layer arranged to correspond to the corresponding sub-pixels can overlap with the connection portion.

[0018] According to an embodiment of the present specification, the plurality of sub-pixels include first, second, third, and fourth sub-pixels. Among the first to fourth sub-pixels, the color filter layer arranged in the sub-pixel that emits the shortest wavelength color is arranged to extend to and overlap with the connection portions of the adjacent sub-pixels of other colors.

[0019] According to an embodiment of the present specification, the first sub-pixel is red, the second sub-pixel is blue, the third sub-pixel is white (or white), the fourth sub-pixel is a green sub-pixel, and the second sub-pixel is arranged to overlap with the connection portions of the third and fourth sub-pixels.

[0020] According to an embodiment of the present specification, the bank layer overlaps with the outermost pattern having a rotated structure of the light extraction pattern as a black bank layer.

[0021] According to an embodiment of the present specification, the bank layer is arranged between the light extraction patterns having different rotation angles for each adjacent sub-pixel as a black bank layer.

[0022] According to an embodiment of the present specification, the black bank layer is arranged to overlap with the connection portion.

[0023] According to an embodiment of the present specification, the color filter layer arranged to correspond to the corresponding sub-pixels overlaps with the connection portion.

[0024] According to an 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 sub-pixels in a light-emitting region defined on the substrate, and a planarization layer including a plurality of light extraction patterns in the plurality of sub-pixels and including a plurality of recesses in each of the plurality of sub-pixels. Among the plurality of light extraction patterns, the direction between any adjacent centers is not parallel to the first direction or the second direction.

[0025] According to an 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 sub-pixels in a light-emitting region defined on the substrate, and a planarization layer including a plurality of light extraction patterns in the plurality of sub-pixels and including a plurality of recesses in each of the plurality of sub-pixels. Each of the plurality of light extraction patterns has a shape defining one or more axes of symmetry, and the one or more axes of symmetry are 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 an embodiment of the present specification, an organic light-emitting display device includes a substrate having a plurality of sub-pixels defined in a light-emitting region, a planarization layer located on the substrate with the plurality of sub-pixels and having an upper surface including a plurality of recesses in each of the plurality of sub-pixels, and a light-emitting element in each of the plurality of sub-pixels. Each of the light-emitting elements is on a recess of each of the plurality of sub-pixels and has an isometric shape following each of the plurality of recesses as it is.

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

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

[0029] According to an embodiment of the present specification, the orientations of the light extraction patterns arranged in two adjacent sub-pixels among the plurality of sub-pixels differ by 3 degrees or more and are within a range of 0 degrees or more and less than 60 degrees.

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

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

Advantages of the Invention

[0032] The organic light-emitting display device according to the present specification can improve the light extraction efficiency of the light emitted by the organic light-emitting element.

[0033] The organic light-emitting display device according to the present specification can improve the reflected visual sensation caused by the incident external light and the reflected light reflected inside, prevent black floating, and thereby realize real black in the non-driven or off state.

[0034] The organic light-emitting display device according to the present specification can improve Rainbow Mura by rotating the light extraction pattern irregularly or randomly.

[0035] The organic light-emitting display device according to the present specification applies a bank layer disposed between light extraction patterns having a rotated structure as a black bank layer, can block or improve the path of external light incident light and various scattered light reflected or / and generated through various paths inside, can improve the aperture ratio, and can improve the color paleness phenomenon generated through various scattering angles.

[0036] The organic light-emitting display device according to the present specification applies a bank layer disposed between light extraction patterns having an irregular or randomly rotated structure as a black bank layer, and can prevent the occurrence of the Speckle phenomenon and the Pearl phenomenon.

[0037] Since the organic light-emitting display device according to the present specification can implement high efficiency and high brightness, it can extend the lifespan of the organic light-emitting element, reduce power consumption, and enable the implementation of low power.

Brief Description of the Drawings

[0038]

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Mode for Carrying Out the Invention

[0039] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments introduced below are provided as examples to sufficiently 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 can also be embodied in other forms.

[0040] And in the drawings, the size, thickness, etc. of the device can be exaggerated for convenience of representation. The scale of the components shown in the drawings has a scale different from the actual one for convenience of explanation, and thus is not limited to the scale shown in the drawings. Throughout the specification, the same reference numerals represent the same components.

[0041] Also, in the description of this specification, when it is determined that a specific description of related known technologies makes the gist of this specification unnecessarily ambiguous, the detailed description thereof will be omitted.

[0042] When terms such as "including", "having", "consisting of", etc. mentioned in this specification are used, other parts can be added unless "only" is used. When a component is expressed in the singular, it includes the case of including a plurality unless otherwise specifically stated.

[0043] When describing a positional relationship, for example, when describing the positional relationship between two parts using terms such as "above", "at the upper part", "at the lower part", "next to", etc., unless terms such as "immediately" or "directly" are used, one or more other parts can be arranged between the two parts. Spatially relative terms such as "below", "lower", "above", "upper", etc. can be used to easily describe the correlation between one element or component and another element or component as shown in the figure. Spatially relative terms should be understood as terms including different directions of elements relative to each other during use or operation in addition to the directions shown in the figure. For example, when the elements shown in the figure are inverted, the element described as "below" or "beneath" another element can be placed "above" the other element. Therefore, the exemplary term "below" can include both the downward and upward directions.

[0044] When describing the components of this specification, terms such as first, second, A, B, (a), (b), etc. can be used. Such terms are for distinguishing the components from other components, and the essence, order, sequence, or number of the components are not limited by such terms.

[0045] The features of each of several embodiments of this specification can be partially or wholly combined or combined with each other, enabling various technical linkages and drives, and each embodiment can be implemented independently of each other or implemented together in a related relationship.

[0046] Hereinafter, the organic light-emitting display device of this specification will be described in detail through the accompanying drawings and examples as follows.

[0047] FIG. 1 is a diagram for explaining an organic light-emitting display device according to an example of this specification.

[0048] Referring to FIG. 1, an organic light-emitting display device according to an example of the present specification may include a display panel 10 including a substrate 100 and a counter substrate 300 that are attached 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 part, a display part, or a screen. The display area (AA) may include a plurality of pixels (P). The plurality of pixels (P) may be unit areas where actual light emits. A pixel (P) may include a plurality of sub-pixels (SP). According to one embodiment, each of the plurality of pixels (P) may include at least one red sub-pixel, at least one green sub-pixel, at least one blue sub-pixel, and at least one white sub-pixel.

[0051] The non-display area (IA) is an area where an image is not 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 a gate driving circuit connected to the plurality of pixels (P).

[0052] The counter substrate 300 may be disposed to face and be attached to the substrate 100 via an adhesive member (or a transparent adhesive), or in a manner where an organic or inorganic material is laminated on the substrate 100. The counter substrate 300 may be an upper substrate, a second substrate, or a sealing substrate and may correspond to sealing the substrate 100.

[0053] FIG. 2 is a cross-sectional view showing a cross-sectional structure of one sub-pixel (SP) according to an example of the present specification, and FIG. 3 is a view showing a planar structure of the pixel (P) shown in FIG. 1. FIG. 4 is a plan view showing an enlarged view of a portion “A” according to an embodiment of FIG. 3.

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

[0055] One pixel (P) includes a plurality of sub-pixels (SP1, SP2, SP3, SP4), and each sub-pixel (SP) includes a plurality of light extraction patterns 140, 140a, 140b, 140c, 140d in a light-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 sub-pixels (SP1, SP2, SP3, SP4) may have a structure rotated with respect to a reference point (or an arbitrary point) in the light-emitting area (EA). For example, the light extraction pattern 140 disposed in at least one of the plurality of sub-pixels (SP1, SP2, SP3, SP4) may have a structure rotated with respect to a center portion (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 reversely rotated at different angles with respect to a reference point in the corresponding light-emitting area (EA) or a center portion (CP) of one recess 141. Accordingly, the light extraction patterns 140 configured in each of the sub-pixels (SP1 to SP4) of each of the plurality of pixels (P) may be rotated or reversely rotated at different angles with respect to each other.

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

[0058] A plurality of sub-pixels (SP1, SP2, SP3, SP4) include a first sub-pixel (SP1), a second sub-pixel (SP2), a third sub-pixel (SP3), and a fourth sub-pixel (SP4) that emit different colors. The first sub-pixel (SP1) is a red sub-pixel, the second sub-pixel (SP2) is a white sub-pixel, the third sub-pixel (SP3) is a blue sub-pixel, and the fourth sub-pixel (SP4) can be a green sub-pixel. The light-emitting regions (EA) of the first to fourth sub-pixels (SP1 to SP4) can have different sizes (or areas) from each other.

[0059] One sub-pixel (SP) can include a light-emitting region (EA) and a circuit region (CA). The circuit region (CA) can be spatially separated from the light-emitting region (EA) within the sub-pixel (SP). The light-emitting region (EA) can be a region defined by the first electrode (E1) being opened by the bank layer 190 in the sub-pixel (SP). The first electrode (E1) can be an electrode that functions as a pixel electrode or an anode electrode. The circuit region (CA) can be a non-light-emitting region or a non-opening region.

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

[0061] The organic light-emitting display device according to the present specification may have a buffer layer 110, a driving thin-film transistor (Tdr), a protective layer 130, a planarization layer 170, and a light-emitting element (EP) laminated 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 block the diffusion of substances contained in the substrate 100 into the transistor layer during a high-temperature process in the manufacturing process of the thin-film transistor, or may also serve to prevent external moisture and humidity from penetrating toward the light-emitting element (EP). Optionally, the buffer layer 110 may be composed of a plurality of layers in some cases, or may also be omitted.

[0063] The driving thin-film transistor (Tdr) is disposed in a circuit region (CA), and the driving thin-film transistor (Tdr) 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 by swapping with each other depending on the form of the driving thin-film transistor (Tdr).

[0064] The active layer 111 constituting the driving thin-film transistor (Tdr) may be composed 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 form only on the channel region of the active layer 111, or may be disposed over the entire substrate 100 including the active layer 111 or the buffer layer 110.

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

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

[0068] The protective layer 130 can be provided on the substrate 100 so as to cover the driving thin-film transistor (Tdr). The protective layer 130 can 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 can be disposed throughout the circuit region (CA) and the light-emitting region (EA). The protective layer 130 can also be represented by the term passivation layer.

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

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

[0071] The color filter layer 150 can have a size larger than that of the light emitting region (EA). Since the color filter layer 150 is larger than the light emitting region (EA), it can be disposed in a region wider than the region where the plurality of light extraction patterns 140 of the planarization layer 170 are arranged. When the color filter layer 150 has a size larger than that of the light extraction pattern 140, it is possible to reduce the occurrence of light leakage where internal light leaks to adjacent sub-pixels (SP).

[0072] The color filter layer 150 can transmit wavelengths of red, green, or blue in accordance with the color that each sub-pixel (SP) attempts to embody. 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) is a red color filter, and the color filter layer 150 may not be disposed in the second sub-pixel (SP2). The color filter layer 150 provided in the third sub-pixel (SP3) can include a blue color filter, and the color filter layer 150 provided in the fourth sub-pixel (SP4) can include a green color filter, respectively.

[0073] The planarization layer 170 can be provided on the substrate 100 so as to cover the protective layer 130. When the protective layer 130 is omitted, the planarization layer 170 can be provided on the substrate 100 so as to cover the driving thin film transistor (Tdr), the color filter layer 150, and the plurality of wirings. The planarization layer 170 can be disposed throughout the circuit region (CA) and the light emitting region (EA). The planarization layer 170 has a size relatively larger than that of the display region (AA) and can be disposed up to the non-display region.

[0074] The planarization layer 170 can be disposed to have a relatively thick thickness compared to other insulating films to provide a flat surface on the display region (AA). For example, the planarization layer 170 can be made of an organic material such as photo acrylic, benzocyclobutene, polyimide, and fluororesin.

[0075] The planarization layer 170 may include a plurality of light extraction patterns 140 disposed in the light emitting region (EA). The light extraction patterns 140 may be disposed on the upper surface 170a of the planarization layer 170 so as to overlap with the light emitting region (EA). The light extraction patterns 140 may also be disposed on the outer contour of the light emitting region (EA). The light extraction patterns 140 are formed in the planarization layer 170 of the light emitting region (EA) so as to have a bent (or uneven) shape, change the traveling path of the light emitted by the light emitting element (EP), and improve the light extraction efficiency. The plurality of light extraction patterns 140 may be a micro lens array.

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

[0077] The light extraction pattern 140 may include a plurality of concave portions 141 and a plurality of convex portions 143 disposed around and / or between the respective concave portions 141. The convex portions 143 and the concave portions 141 may be alternately arranged in a plurality of connected pieces. The plurality of concave portions 141 of the light extraction pattern 140 are concave in form with respect to the upper surface 170a of the planarization layer 170, but have a convex surface in the direction toward the substrate 100 in a lens form and may be arranged in a plurality of connected pieces.

[0078] Each of the plurality of concave portions 141 may have the same depth with respect to the upper surface 170a of the planarization layer 170, but some of the plurality of concave portions 141 may have different depths.

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

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

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

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

[0083] Since the first electrode (E1) is formed (or deposited) on the planarization layer 170 so as to have a relatively thin thickness, it has a surface shape that follows the surface shape (morphology) of the light extraction pattern 140 including the convex portions 143 and the plurality of concave portions 141 as it is. The first electrode (E1) can have a cross-sectional structure in the same form as the light extraction pattern 140.

[0084] The light-emitting layer (EL) is formed on the first electrode (E1) and can be in direct contact with the first electrode (E1). The light-emitting layer (EL) is formed (or deposited) on the first electrode (E1) so as to have a relatively thick thickness with respect to the first electrode (E1), whereby it can have a surface shape different from the surface shape of each of the plurality of concave portions 141 and convex portions 143 or the surface shape of the first electrode (E1). For example, the light-emitting layer (EL) can have a cross-sectional structure different from that of the first electrode (E1) by being formed in a non-conformal form that does not follow the surface shape (or morphology) of the first electrode (E1) as it is in the deposition process. The light-emitting layer (EL) according to one embodiment can have a gradually increasing thickness as it goes to the bottom surface of the convex portion 143 or the concave portion 141.

[0085] The light-emitting layer (EL) according to one embodiment includes two or more organic light-emitting layers for emitting white light. As an example, the light-emitting layer (EL) can include a first organic light-emitting layer and a second organic light-emitting layer for emitting white light by mixing the first light and the second light.

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

[0087] The second electrode (E2) can include a metal material with a higher reflectivity compared to the first electrode (E1) in order to reflect the light emitted from and incident on the light-emitting layer (EL) toward the substrate 100 side. The second electrode (E2) can include a single-layer structure or a multilayer structure composed of any one substance selected from aluminum (Al), silver (Ag), molybdenum (Mo), gold (Au), magnesium (Mg), calcium (Ca), or barium (Ba) or two or more alloy substances. The second electrode (E2) can be a cathode electrode.

[0088] By changing the path of the light emitted by the light-emitting layer (EL) to the second surface 100b of the substrate 100, which is the light-emitting surface (or light extraction surface), the concave portion 141 or the convex portion 143 of the light extraction pattern 140 can increase the external extraction efficiency of the light emitted by the light-emitting layer (EL).

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

[0090] The bank layer 190 can be made of a transparent material or an opaque material. The bank layer 190 can be disposed with a photosensitive agent containing a black pigment. When the bank layer 190 contains an opaque material or a black pigment, it can be named a black bank layer. In this case, when the bank layer 190 is a black bank layer, it can serve as a light-shielding member between adjacent sub-pixels (SP).

[0091] Since the light extraction pattern 140 can be disposed wider than the light-emitting area (EA), here, the bank layer 190 is disposed so as to overlap with the light extraction pattern 140. The tip (or the boundary line of the bank layer) of the bank layer 190 adjacent to the light-emitting area (EA) can be disposed so as 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 sealing portion 200 can be formed on the substrate 100 so as to cover the second electrode (E2). For example, the sealing portion 200 can surround the display area. The sealing portion 200 can protect the thin film transistor, the light-emitting layer (EL), etc. from external impacts, and can serve to prevent oxygen or / and moisture and further foreign substances (particles) from penetrating into the light-emitting layer (EL).

[0094] The sealing portion 200 according to one embodiment can include a plurality of inorganic sealing layers. And the sealing portion 200 can further include at least one organic sealing layer interposed between the plurality of inorganic sealing layers. The sealing portion 200 according to another embodiment can include a filler that entirely surrounds the display area. In this case, the counter substrate 300 can be bonded to the substrate 100 through the filler. The filler can further include a getter material that absorbs oxygen or / and moisture, etc.

[0095] Referring to FIG. 4, the light extraction pattern 140 of the organic light emitting display device according to an embodiment of the present specification will be described in detail. The plurality of recesses 141 of the light extraction pattern 140 are arranged to have a certain interval along the first direction (X), and may be arranged to have a certain interval along the second direction (Y) crossing the first direction (X). The first direction (X) may be the first longitudinal direction of the substrate, the long side longitudinal direction of the display panel, the lateral direction, or the horizontal direction. The second direction (Y) may be the second longitudinal direction of the substrate, the short side longitudinal direction of the display panel, the longitudinal direction, or the vertical direction.

[0096] According to an embodiment, the central portions (CP) of three adjacent recesses 141 may form a triangular shape (TS). Also, when the central portions (CP) of six recesses 141 arranged around one recess 141 or surrounding one recess 141 are connected to each other, a hexagon (HS) can be formed in a plane. The outer contours of the plurality of recesses 141 may be arranged or formed in a honeycomb structure, a honeycomb structure, or a circle structure.

[0097] The plurality of recesses 141 of the light extraction pattern 140 have a rotated structure with respect to the first direction (X) or / and the second direction (Y). For example, the light extraction pattern 140 has a structure in which the plurality of recesses 141 are rotated about a reference point in 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 part thereof can be regarded as referring to the light extraction pattern 140 oriented (or angularly positioned) at an angle, such as an angle with respect to the reference point or an angle with respect to the central portion of each of the plurality of recesses. For example, throughout this specification, the light extraction pattern 140 having a rotated structure can be regarded as having an orientation (e.g., a rotational orientation or an angular position) in a plane defined by the first direction (X) and the second direction (Y) with respect to the reference point or the central portion of each of the plurality of recesses.

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

[0099] And among a plurality of recesses 141 arranged along a second direction (Y), when the central portion (CP) of one recess 141 is arranged or aligned on a second straight line (SL2) that is aligned with or parallel to the second direction (Y), the central portions (CP) of other recesses 141 arranged adjacent to one recess 141 may be arranged so as not to be located or aligned on the second straight line (SL2) that is aligned with or parallel to the second direction (Y). For example, in the example of FIG. 4, the recesses do not have a symmetry axis parallel to the second direction (Y).

[0100] The plurality of recesses 141 can be configured to be rotated at a rotation angle (θ3) greater than 0 degrees and less than 60 degrees about an arbitrary reference point within the pixel region. Throughout this specification, the rotation angle of the light extraction pattern 140 can be regarded as having an orientation (e.g., a rotational orientation or an 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. The orientation of each light extraction pattern 140 can 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 angles of the plurality of light extraction patterns 140 can be set irregularly or randomly along one or more of the first direction (X) and the second direction (Y) within a range of rotation angles (θ3) greater than 0 degrees and less than 60 degrees. Throughout this specification, the rotation angles of the plurality of light extraction patterns in each sub-pixel can be measured with respect to (and / or relative to) the corresponding portion of each sub-pixel. The arbitrary reference point can be at an arbitrary position within the light-emitting regions (EA) of the first to fourth sub-pixels (SP1 to SP4) of the pixel (P), or can be the center (CP) of any one of the plurality of recesses 141.

[0101] The plurality of recesses 141 of the light extraction pattern 140 can be configured to be rotated (or horizontally rotated) or reversely rotated (or horizontally reversely rotated) at a preset third angle (θ3) about an arbitrary reference point.

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

[0103] According to one embodiment, the center portion (CP) of each of the plurality of concave portions 141 arranged along the first direction (X) can be arranged or aligned on a first tilt line (TL1) that intersects the first straight line (SL1). And the center portion (CP) of each of the plurality of concave portions 141 arranged along the second direction (Y) can be located or aligned on a second tilt line (TL2) that intersects the second straight line (SL2).

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

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

[0106] According to an embodiment of the present specification, the pitch (or interval) (L1) between the concave portions 141 arranged in each of the plurality of sub-pixels (SP) constituting one pixel can be the same as or different from each other. The pitch (L1) between the concave portions 141 can be the distance (or interval) between the central portions (CP) of two adjacent concave portions 141.

[0107] As an example, the pitch (L1) between the concave portions 141 arranged in each of the red sub-pixel, green sub-pixel, blue sub-pixel, and white sub-pixel can be the same as or different from each other. For example, the pitch (L1) between the concave portions 141 arranged in the green sub-pixel can be different from the pitch between the concave portions 141 arranged in the blue sub-pixel.

[0108] In another embodiment, the pitch (L1) between the concave portions 141 arranged in each of the white sub-pixel and / or green sub-pixel can be different from the pitch (L1) between the concave portions 141 arranged in the red sub-pixel and / or blue sub-pixel.

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

[0110] According to an embodiment of the present specification, the organic light emitting display device 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 patterns due to the reinforcing interference of the reflected light are canceled out by the light extraction patterns 140 having different rotation angles and minimized, or the cancellation interference can be further amplified due to the irregularity or randomness of the rotation angles of the light extraction patterns 140. Therefore, the generation of the rainbow pattern of the radiation form of the reflected light can be suppressed or minimized.

[0111] According to still another embodiment of the present specification, the organic light emitting display device can reduce or minimize the occurrence of rainbow unevenness. Therefore, the reduction of the black visual characteristic generated by the reflection of external light in the non-driven or off state can be reduced, and real black can be realized.

[0112] Hereinafter, some embodiments for setting the rotation angle of the light extraction pattern 140 in the display area (AA) will be described.

[0113] Referring to FIGS. 5 to 7B, the display area (AA) of the 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) can be divided into or blocked into n×m pixel blocks (PB[1,1] to PB[n,m]). The plurality of pixel blocks (PB[1,1] to PB[n,m]) can be arranged in n rows and m columns in the display area (AA). The rotation angles of the light extraction patterns 140 arranged in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) are arranged to be different in pixel block units, but different angles can be set irregularly or randomly.

[0115] For example, among the plurality of pixel blocks (PB[1,1] to PB[n,m]), the rotation angles of the light extraction patterns 140 arranged in pixel blocks that are directly adjacent along any one of the first direction, the second direction, and the diagonal direction can have asymmetry, irregularity, or randomness.

[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 pixel blocks that are directly adjacent along any one of the first direction, the second direction, and the diagonal direction can have a difference of 1 degree or more or a difference of 3 degrees or more within the range of 0 degrees or more and less than 60 degrees.

[0117] Among the plurality of pixel blocks (PB[1,1] to PB[n,m]), some of the rotation angles of the light extraction patterns 140 arranged in pixel blocks that are not directly adjacent along any one of the first direction, the second direction, and the diagonal direction can 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]) can 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 a 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 5×4 matrix.

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

[0121] One or more of the light extraction patterns 140 arranged on the pixels (P) of each of the plurality of pixel groups (PG[1,1] to PG[i,j]) can be configured by rotating around a preset angle with an arbitrary reference point in the corresponding pixel (P) as the center. The rotation angles of the light extraction patterns 140 arranged on each of the plurality of sub-pixels (SP) constituting one pixel (P) can be rotation angles for each pixel.

[0122] For example, since the rotation angles of the light extraction patterns 140 for each pixel are similarly set for each of the plurality of sub-pixels (SP) constituting one pixel (P), the rotation angles of the light extraction patterns 140 for each pixel (P) are different from each other, but the rotation angles of the light extraction patterns 140 for each of the plurality of sub-pixels (SP) within a pixel (P) can be the same. (See FIG. 9)

[0123] As an example, the rotation angles of the light extraction patterns 140 for each pixel 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]) can have a difference of 1 degree or more or 3 degrees or more from each other within the range of 0 degrees or more and less than 60 degrees.

[0124] For example, among the pixel groups (PG[1,1] to PG[i,j]) included in a 1×1 pixel block (PB[1,1]), the rotation angle for each pixel of the light extraction pattern 140 arranged in one or more non-adjacent pixel groups can be 0 degrees or the same, and the rotation angle for each pixel of the light extraction pattern 140 arranged in the remaining pixels can be set irregularly or randomly within a range greater than 0 degrees and less than 60 degrees. The rotation angle for 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 be different 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.

[0125] According to another embodiment, the rotation angle for 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 angle for each pixel of the light extraction pattern 140 arranged in each of the i×j pixel groups (PG[1,1] to PG[i,j]) has irregularity or randomness.

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

[0128] Condition 3): The rotation angle for 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 can be 0 degrees.

[0129] Condition 4): Two or more adjacent pixel groups (PG[1,1] to PG[i,j]) of the light extraction pattern 140 having a difference of 1 degree or more or a difference of 3 degrees or more in the rotation angle for each pixel are arranged between pixel groups (PG[1,1] to PG[i,j]) of the light extraction pattern 140 having a rotation angle of 0 degrees for each pixel.

[0130] Condition 5): The rotation angle for each pixel of the light extraction pattern 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.

[0131] Condition 6): Two or more adjacent pixel groups (PG[1,1] to PG[i,j]) of the light extraction pattern 140 having a difference of 1 degree or more or a difference of 3 degrees or more in the rotation angle for each pixel are arranged between pixel groups (PG[1,1] to PG[i,j]) of the light extraction pattern 140 having the same rotation angle for each pixel.

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

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

[0134] Therefore, in the organic light-emitting display device according to another embodiment of the present specification, the rotation angle of the light extraction pattern 140 for each pixel block, which is arranged in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]), is different from the rotation angle of the light extraction pattern 140 for each pixel group, which is 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 different rotation angles randomly, the diffraction pattern of the reflected light generated by the reflected light in the light extraction pattern 140 arranged in each of the plurality of pixels (P) can be canceled or minimized.

[0135] In addition, the organic light-emitting display device according to another embodiment of the present specification can increase the cancellation interference due to the irregularity or randomness of the light extraction pattern 140 for each pixel (P), and the generation of the rainbow pattern of the radiation form of the reflected light and the circular ring pattern of the radiation form can be suppressed or minimized. As a result, the reduction of the black visual characteristic generated by the reflection of external light in the non-driven or off state can be reduced, and real black can be realized.

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

[0137] According to one embodiment, in each of a plurality of pixel groups (PG[1,1] to PG[x,y]), the light extraction pattern 140 disposed in each of the four pixels (P) has a structure rotated at a preset angle about an arbitrary reference point within the corresponding pixel (P). For example, in each of a plurality of pixel groups (PG[1,1] to PG[x,y]), the light extraction pattern 140 disposed in each of a plurality of sub-pixels included in each of the four pixels (P) can be configured to be rotated at a preset angle about the center of any one recess 141 within the corresponding sub-pixel.

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

[0139] According to another embodiment of the present specification, in the organic light-emitting display device, the rotation angle of the light extraction pattern 140 arranged in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) is different for each pixel block, and the rotation angle of the light extraction pattern 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]) is set to be different. By randomly setting different angles, external light enters the inside of the organic light-emitting display device, and the diffraction pattern of the reflected light generated by the light extraction pattern 140 of each of the plurality of pixels (P) reflecting the incident light can be canceled or minimized.

[0140] Also, in the organic light-emitting display device according to another embodiment of the present specification, due to the irregularity or randomness of the light extraction pattern 140, the cancellation interference can be increased, and the generation of the rainbow pattern and the circular ring pattern in the radiation form can be suppressed or minimized. As a result, the degradation of the black visual characteristic generated by the reflection of external light in the non-driven or off state can be reduced, and real black can be realized.

[0141] Referring to FIG. 8B, in the organic light-emitting display device according to another embodiment of the present specification, one pixel block (PB[1,1]) can include a plurality of pixel groups (PG[1,1] to PG[x,y]). A plurality of sub-pixels (SP) can 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 a plurality of pixel blocks (PB[1,1] to PB[n,m]), a light extraction pattern 140 disposed in each of a plurality of sub-pixels (SP) has a structure rotated at a preset angle about an arbitrary reference point within the corresponding sub-pixel (SP). The light extraction patterns 140 disposed 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 sub-pixel of the light extraction pattern 140 disposed in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) 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 0 degrees or more and less than 60 degrees.

[0144] For example, the rotation angle of each sub-pixel of the light extraction pattern 140 disposed in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) included in a 1×1 pixel block (PB[1,1]) can have a difference of 1 degree or more or 3 degrees or more from each other. Among the g×h sub-pixels (SP[1,1] to SP[g,h]) included in the 1×1 pixel block (PB[1,1]), the rotation angle of each sub-pixel of the light extraction pattern 140 disposed in one or more non-adjacent sub-pixels can be 0 degrees or the same, and the rotation angle of each sub-pixel of the light extraction pattern 140 disposed in the remaining sub-pixels can be set irregularly or randomly within a range greater than 0 degrees and less than 60 degrees.

[0145] The rotation angle of each sub-pixel of the light extraction pattern 140 disposed in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) 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 0 degrees or more and less than 60 degrees along any one of the first direction, the second direction, and the diagonal direction.

[0146] According to another embodiment of the present specification, in the organic light-emitting display device, the rotation angles of the light extraction patterns 140 for each sub-pixel, which are arranged in each of g×h sub-pixels (SP[1,1] to SP[g,h]) arranged in each of a plurality of pixel blocks (PB[1,1] to PB[n,m]), and the rotation angles of the light extraction patterns 140 for each sub-pixel included in each of the plurality of pixel blocks (PB[1,1] to PB[n,m]) are set to be different. By randomly setting different angles, external light enters the interior of the organic light-emitting display device, and the diffraction pattern of the reflected light generated by the reflected light in the light extraction patterns 140 arranged in each of the plurality of sub-pixels (SP) can be canceled or minimized.

[0147] In addition, in the organic light-emitting display device according to another embodiment of the present specification, due to the irregularity or randomness of the light extraction pattern 140 for each sub-pixel (SP), the cancellation interference can be increased, and the generation of the rainbow pattern and the circular ring pattern of the radiation form of the reflected light can be suppressed or minimized. As a result, the reduction of the black visual characteristic generated by the reflection of external light in the non-driven or off state can be reduced, and real black can be realized.

[0148] Referring to FIG. 9, the 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]). Four sub-pixels (SP) constitute one pixel (P). The light extraction pattern 140 arranged in units of one pixel (P) can be configured by rotating at a preset angle around an arbitrary reference point within the corresponding pixel (P). The light extraction pattern 140 arranged in one pixel (P) can be configured by rotating 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 on each of a plurality of pixels (P) can be set irregularly or randomly along one or more directions of the first direction and the second direction within a range greater than 0 degrees and less than 60 degrees. Any reference point can be at any position within the pixel or at the center portion (CP) of any one of the plurality of recesses 141.

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

[0151] For example, the rotation angles of the light extraction patterns 140 disposed on the first to fourth sub-pixels (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 disposed on the first to fourth sub-pixels (SP[2,1] to SP[2,4]) of the second row belonging to one pixel (P) arranged in the second row are the same. However, the rotation angle of the light extraction pattern 140 within any one of the first to fourth sub-pixels (SP[1,1] to SP[1,4]) of the first row or the first to fourth sub-pixels (SP[1,1] to SP[1,4]) of the first row and the rotation angle of the light extraction pattern 140 within any one of the first to fourth sub-pixels (SP[2,1] to SP[2,4]) of the second row or the first to fourth sub-pixels (SP[2,1] to SP[2,4]) of the second row are different from each other.

[0152] According to an embodiment of the present specification, among a plurality of pixels (P), the rotation angles of the light extraction patterns 140 arranged in each of two adjacent pixels (P) can have a difference of 1 degree or more. The rotation angles of the light extraction patterns 140 arranged in each of two adjacent patterns (P) along one or more directions among the first direction (X) and the second direction (Y) can have a difference of 1 degree or more. For example, the rotation angles of the light extraction patterns 140 arranged in each of two adjacent patterns (P) in all directions can have a difference of 1 degree or more.

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

[0154] Due to the difference in the rotation angles of the light extraction patterns 140 arranged in each of the adjacent pixels (P), the diffraction patterns (or diffraction pattern distributions) of the radiation forms by the reflected light generated in each of the two adjacent pixels (P) can cancel each other out or be minimized, or the cancellation effect can be increased by irregularity or randomness to prevent the rainbow mura phenomenon. Thereby, a decrease in the black visual characteristic generated by the reflection of external light in the non-driven or off state can be reduced to realize real black.

[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 pattern 140 arranged for each sub-pixel (SP) can 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 sub-pixel-specific light extraction patterns 140 arranged for each of the g×h sub-pixels (SP[1,1] to SP[g,h]) can be different from each other. The rotation angles of the light extraction patterns 140 arranged for each of the plurality of sub-pixels (SP) can mean the rotation angles of the light extraction patterns 140 for each sub-pixel.

[0157] Specifically, the rotation angles of the light extraction patterns 140 for each sub-pixel arranged for each of the g×h sub-pixels (SP[1,1] to SP[g,h]) can have a difference of 1 degree or more or 3 degrees or more from each other. Among the g×h sub-pixels (SP[1,1] to SP[g,h]), the rotation angles of the light extraction patterns 140 for one or more non-adjacent sub-pixels can be 0 degrees or the same, and the rotation angles of the light extraction patterns 140 for the remaining sub-pixels can be set irregularly or randomly within a range greater than 0 degrees and less than 60 degrees.

[0158] According to one embodiment, the rotation angles of the light extraction patterns 140 for each sub-pixel arranged for each of the g×h sub-pixels (SP[1,1] to SP[g,h]) can be set to be different 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 respective rotation angles of the first to fourth light extraction patterns 140a to 140d arranged in each of the four sub-pixels (SP[1,1] to SP[1,4]) 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. The rotation angle of the first light extraction pattern 140a of the first sub-pixel (SP[1,1]) can be 60 degrees or 0 degrees without rotation. The rotation angle of the second light extraction pattern 140b configured in the second sub-pixel (SP[1,2]) can be 57 degrees. The rotation angle of the third light extraction pattern 140c configured in the third sub-pixel (SP[1,3]) can be 53 degrees. The rotation angle of the fourth light extraction pattern 140d configured in the fourth sub-pixel (SP[1,4]) can be 49 degrees.

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

[0161] Condition 1): The rotation angle of each sub-pixel of the light extraction pattern 140 arranged in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) has irregularity or randomness.

[0162] Condition 2): The rotation angle of each sub-pixel of the light extraction pattern 140 of two sub-pixels (SP[1,1] to SP[g,h]) that are directly adjacent to each other along any one of the first direction, the second direction, and the diagonal direction has a difference of 1 degree or more or a difference of 3 degrees or more.

[0163] Condition 3): The rotation angle of each sub-pixel of the light extraction pattern 140 arranged in sub-pixels (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 can be 0 degrees.

[0164] Condition 4): Two or more adjacent sub-pixels (SP[1,1] to SP[g,h]) of the light extraction pattern 140 having a difference of 1 degree or more or a difference of 3 degrees or more in the rotation angle for each sub-pixel are arranged between sub-pixels (SP[1,1] to SP[g,h]) of the light extraction pattern 140 having a rotation angle of 0 degrees for each sub-pixel.

[0165] Condition 5): The rotation angles for each sub-pixel of the light extraction pattern 140 arranged in sub-pixels (SP[1,1] to SP[g,h]) that are not directly adjacent along any one of the first direction, the second direction, and the diagonal direction can be the same.

[0166] Condition 6): Two or more adjacent sub-pixels (SP[1,1] to SP[g,h]) of the light extraction pattern 140 having a difference of 1 degree or more or a difference of 3 degrees or more in the rotation angle for each sub-pixel are arranged between sub-pixels (SP[1,1] to SP[g,h]) of the light extraction pattern 140 having the same rotation angle for each sub-pixel.

[0167] According to an embodiment of the present specification, the rotation angles for each sub-pixel of the light extraction pattern 140 arranged in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) can be different or randomly set.

[0168] For example, among the g×h sub-pixels (SP[1,1] to SP[g,h]), the rotation angles for each sub-pixel of the light extraction pattern 140 arranged in sub-pixels (SP) that are directly adjacent along any one of the first direction, the second direction, and the diagonal direction can have asymmetry, irregularity, or randomness.

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

[0170] Therefore, in the organic light-emitting display device according to another embodiment of the present specification, the externally incident light is reflected inside the organic light-emitting display device, and the diffraction pattern of the reflected light is canceled out by the rotated angles of the respective light extraction patterns 140 of the plurality of sub-pixels (SP) to be minimized, or the effect of destructive interference is further increased by the irregularity or randomness of the rotation angles for each sub-pixel (SP). Thus, the occurrence of rainbow mura in the radiation pattern of the reflected light and the generation of a circular ring pattern in the radiation pattern can be suppressed or minimized.

[0171] In the organic light-emitting display device according to another embodiment of the present specification, since the occurrence of rainbow mura can be reduced or minimized, the degradation of the black visual characteristics generated by the reflection of external light in the non-driven or off state can be reduced, and real black can be realized.

[0172] FIG. 11 is a diagram showing one pixel in the organic light-emitting display device according to still another embodiment of the present specification. In the following description, redundant descriptions for the same reference numerals described above are omitted.

[0173] As shown in FIG. 11, the organic light-emitting display device according to still another embodiment of the present specification includes a plurality of sub-pixels (SP1, SP2, SP3, SP4), and each sub-pixel (SP) includes a plurality of light extraction patterns 240, 240a, 240b, 240c, 240d in a light-emitting region (EA) defined by a bank layer 290. The rotation angles of the light extraction patterns 240a, 240a, 240b, 240c, 240d of the plurality of sub-pixels (SP1 to SP4) are different from each other. Here, the different rotation angles of the light extraction patterns 240a, 240a, 240b, 240c, 240d are set randomly. The light extraction pattern 240 (240a, 240b, 240c, 240d) can include a plurality of recesses 241 and a plurality of protrusions 243 respectively disposed between or in the vicinity of the plurality of recesses 241. The protrusion 243 and the recess 241 are connected to each other and can be arranged alternately in plurality.

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

[0175] The respective 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) are different from each other by 3 degrees or more within the range of 0 degrees or more and less than 60 degrees. Here, the rotation angle is based on the line connecting the central portions of the concave portions 241 of the light extraction pattern 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 from each other 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 from each other by 3 degrees or more, and 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 from each other 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) can be 60 degrees or 0 degrees without rotation. The rotation angle (θ7) of the second light extraction pattern 240b formed in the second sub-pixel (SP2) can be 57 degrees. The rotation angle (θ8) of the third light extraction pattern 240c formed in the third sub-pixel (SP3) can 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) can be 51 degrees or 49 degrees. When the rotation angle (θ8) of the third light extraction pattern 240c formed in the third sub-pixel (SP3) is 53 degrees, the rotation angle (θ9) of the fourth light extraction pattern 240d formed in the fourth sub-pixel (SP4) can be 50 degrees or less than 50 degrees.

[0178] The outermost pattern of the plurality of light extraction patterns 240a to 240d arranged in each light emitting region (EA) is arranged to extend outside the light emitting region (EA) and overlap with the bank layer 290. Here, the outermost pattern has a rotated angle, but has the same rotation angle as the light extraction pattern 240 within the light emitting region (EA) for each sub-pixel (SP).

[0179] Referring to FIG. 12, the light extraction patterns 240 of the plurality of sub-pixels (SP[1,1] to SP[g, h]) in the display area (AA) are arranged such that the difference between each other is 3 degrees or more within a range where the rotation angle between sub-pixels of the same color is greater than 0 degrees and less than 60 degrees. The rotation angle is based on a line connecting the centers of the concave portions 241 of the light extraction pattern 240.

[0180] The rotation angle of each sub-pixel of the light extraction pattern 240 arranged in each of the g×h sub-pixels (SP[1,1] to SP[g,h]) within the display area (AA) is set to be different 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 angles have randomness.

[0181] For example, when g×h sub-pixels (SP[1,1] to SP[g,h]) are arranged in the display area (AA) and sub-pixels of the same color are arranged in the column direction, the first sub-pixels (SP[g,1]) in the g-th row, which are sub-pixels of the same color as the first sub-pixel (SP[1,1]), are arranged separately without being adjacent to each other. However, the first sub-pixel (SP[1,1]) and the first sub-pixel (SP[g,1]) in the g-th row are set such that the rotation angles are different 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 in combination with the setting of the rotation angle of the light extraction pattern within the display area (AA) in other embodiments described above with reference to FIGS. 5 to 10.

[0183] Therefore, in the organic light emitting display device according to another embodiment of the present specification, the incident external light is reflected inside the organic light emitting display device, and the diffraction pattern of the reflected light is canceled out by the rotated angles of the light extraction patterns 140 of the respective sub-pixels (SP) and minimized, or the effect of destructive interference is further increased due to the irregularity or randomness of the rotation angles of the sub-pixels (SP). Thus, the occurrence of the rainbow mura in the radiation pattern of the reflected light and the generation of the circular ring pattern in the radiation pattern can be suppressed or minimized. The organic light emitting display device according to another embodiment of the present specification can reduce or minimize the occurrence of rainbow mura, so that the degradation of the black visual perception characteristics generated by the reflection of external light in the non-driven or off state can be reduced, and real black can be realized.

[0184] As shown in FIGS. 11 and 13, the color filter layer 250 disposed between the light extraction pattern 240 and the substrate 100 can have a size larger than that of the light emitting region (EA). Since the color filter layer 250 is larger than the light emitting region (EA), it can have a region larger than the region where the plurality of light extraction patterns 240 are disposed in each sub-pixel (SP) except for the white sub-pixel.

[0185] When the color filter layer 250 has a size larger than that of the light extraction pattern 240, the occurrence of light leakage where 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 region (CA) so as to overlap with the first electrode (E1) connected to the circuit region (CA). The color filter layer 250 corresponding to one sub-pixel (SP) can be disposed to extend to a part of the circuit region (CA) of another adjacent or neighboring sub-pixel (SP).

[0187] For example, when the first sub-pixel (SP1) is a red sub-pixel, the second sub-pixel (SP2) is a blue sub-pixel, the third sub-pixel (SP3) is a white sub-pixel, and the fourth sub-pixel (SP4) is a green sub-pixel, the second color filter layer 250B corresponding to the blue second sub-pixel (SP2) is disposed to a part of the circuit region (CA) of the second sub-pixel (SP2) so as to overlap with the connection portion 222 of the first electrode (E1) disposed between the light emitting region (EA) and the circuit region (CA) of the second sub-pixel (SP2), and is disposed to a part of the circuit region (CA) of the adjacent third and fourth sub-pixels (SP3 and SP4) so as to overlap with the connection portion 222 of the first electrode (E1) disposed between the light emitting region (EA) and the circuit region (CA) of the third and fourth sub-pixels (SP3 and SP4).

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

[0189] As another example, the first color filter layer 250A corresponding to the red first sub-pixel (SP1) may be arranged up to a part of the circuit region (CA) of the first sub-pixel (SP1) so as to overlap with the connection portion 222 of the first electrode (E1) arranged between the light-emitting region (EA) and the circuit region (CA) of the first sub-pixel (SP1).

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

[0191] Referring to FIG. 14, when the color filter layer 250 is arranged so as to overlap with the connection portion 222 of the first electrode (E1) arranged between the light-emitting region (EA) and the circuit region (CA), the connection portion 222 of the first electrode (E1) can be utilized as a repair portion, enabling repair of the sub-pixel (SP) in the event of a bright or dark spot defect, and improving the reliability of driving. For example, the connection 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 cyan color filter layer 250B is arranged so as to overlap with the connection part 222 of the first electrode (E1) disposed between the light emitting regions (EA) and the circuit regions (CA) of other adjacent or neighboring sub-pixels (SP), the cyan color filter layer 250B, which has a relatively short wavelength when laser repair is applied, can block the laser light having a relatively long wavelength, thereby preventing or minimizing damage to the peripheral layer caused by the laser light during repair.

[0193] The bank layer 290 that defines the light emitting region (EA) can be disposed between the light emitting regions (EA) of the light extraction pattern 240 having a structure rotated so as to cover the edge of the first electrode (E1). The bank layer 290 is disposed so as to overlap with a plurality of underlying wirings (PL, DL, RL) between the light emitting regions (EA).

[0194] The bank layer 290 can be made of an opaque substance or a photosensitive agent containing a black pigment. The bank layer 290 can include a benzocyclobutene (BCB)-based resin, an acrylic-based resin, a polyimide resin, and the like. When the bank layer 290 contains an opaque substance or a black pigment, it can be named a black bank layer. When the bank layer 290 is a black bank layer, it serves as a light shielding member between the light emitting regions (EA) of adjacent sub-pixels (SP), and can prevent or minimize the light scattered inside from being reflected and advancing to adjacent or neighboring sub-pixels (SP).

[0195] When the bank layer 290 is disposed between the light emitting regions (EA) adjacent to the black bank layer, it can block the internal optical path, so there is no need to separately dispose a light shielding structure between the adjacent light emitting regions (EA), and the generation of steps of the stacked layers can be reduced.

[0196] Therefore, in another embodiment of the organic light emitting display device according to the present invention, by disposing the bank layer 290 as a black bank layer between the light emitting regions (EA), the boundary of the light emitting region (EA) can be increased or expanded, and the aperture ratio can be improved.

[0197] The bank layer 290, as a black bank layer, is disposed to overlap with a connection portion 222 of the first electrode (E1) that connects the light emitting region (EA) and the circuit region (CA) between the light emitting region (EA) and the circuit region (CA) of one subpixel (SP). Here, when applying the connection portion 222 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, as a black bank layer, is disposed to overlap with 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, as a black bank layer, is disposed between light extraction patterns 240 having different rotation angles for each adjacent subpixel (SP).

[0199] Various lights inside the display device can be generated through various scattering angles as shown in FIG. 15. As an example, external light enters the substrate 100 and reflected light can be generated by the concave portion 241 and the convex portion 243 of the light extraction pattern 240 inside, and can be generated by the difference in refractive indices of various internal layers (for example, 110, 117, 130, 250, and 170). The light generated through such various scattering angles is reduced from moving 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 specification can prevent or improve the color paleness phenomenon (see FIG. 16A), and the image quality can be improved as in the photograph of FIG. 16B.

[0200] The color fading phenomenon can occur more frequently due to the movement of light to adjacent sub-pixels where the color filter layer 250 is not disposed. However, in the case of the organic light-emitting display device according to other embodiments of the present specification, as shown in FIGS. 13 and 15, a bank layer 290, which is a black bank layer, is disposed between a sub-pixel (e.g., SP3) where the color filter layer 250 is not disposed (or not yet disposed) and a sub-pixel (e.g., SP2) where the color filter layer 250 is disposed, so that the reflected light is absorbed or reflected by the bank layer 290, which is a black bank layer, to reduce the amount of reflected light, and minimize or prevent light from moving to a sub-pixel (e.g., SP3) where the color filter layer 250 is not disposed, thereby improving the color fading phenomenon.

[0201] As described above, the light extraction pattern 240 having a rotated structure disposed in the light-emitting region (EA) has irregularity or randomness, thereby canceling or minimizing the reinforcing interference where light is concentrated, and preventing the rainbow unevenness phenomenon (see FIG. 17A). However, in the organic light-emitting display device according to other embodiments of the present invention, by disposing the bank layer 290 as a black bank layer between the light-emitting regions (EA) of the light extraction pattern 240 having a rotated structure, it is possible to prevent or further minimize the concentration of light, and also prevent the Pearl phenomenon (see FIG. 17B) where it looks whitish in some places due to the multiple interference of various scattered lights.

[0202] Therefore, the organic light-emitting display device according to other embodiments of the present invention can block the movement of light to adjacent sub-pixels (SP) or light-emitting regions (EA) by disposing a black bank layer as the bank layer 290 between the light-emitting regions (EA) including the light extraction pattern 240 having a rotated structure, and can improve the color paleness phenomenon while improving the aperture ratio.

[0203] In addition, in the organic light-emitting display device according to another embodiment of the present invention, by disposing a black bank layer as the bank layer 290 between light-emitting regions (EAs) including a light extraction pattern 240 having an irregularly rotated structure, various scattered lights generated by various paths, such as internal reflection of external light flowing into the organic light-emitting display device and reflection due to differences in the refractive index of internal light, etc., can be prevented from being concentrated by constructive interference or can be made to cancel each other out, multiple interference can be minimized, a phenomenon such as rainbow unevenness as shown in the photograph of FIG. 17C can be prevented, and a speckle phenomenon and a pearl phenomenon can be prevented.

[0204] The organic light-emitting display device according to the embodiment of the present specification can improve the light extraction efficiency, and the reflected lights inside cancel each other out, suppressing or minimizing the generation of a radial rainbow pattern and a radial circular ring pattern, and it can be seen that the black visual characteristics are improved thereby. As a result, the organic light-emitting display device according to the present specification can implement high efficiency and high brightness, so that the lifespan of the light-emitting element (or organic light-emitting element) can be extended, power consumption can be reduced, and low power can be implemented.

[0205] As described above, the description has been centered on the embodiments, but this is merely an example and does not limit the present invention. The present specification described above is not limited to the aforementioned embodiments and the attached drawings, and the features, structures, effects, etc. exemplified in each embodiment can be implemented by combination or modification. Therefore, the content related to such combination and modification should be construed as being included in the scope of the present invention.

Explanation of Reference Numerals

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

Claims

1. a plurality of sub-pixels including a light-emitting region; disposed on the plurality of sub-pixels, and including a planarization layer including a plurality of light extraction patterns having convex portions and a plurality of concave portions; at least one first light extraction pattern among the plurality of light extraction patterns is rotated with respect to the center of each of the plurality of concave portions; an organic light-emitting display device, wherein rotation angles of light extraction patterns disposed on two adjacent sub-pixels among the plurality of sub-pixels are different from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

2. The organic light-emitting display device according to claim 1, wherein shapes of the light extraction patterns in each of the plurality of sub-pixels have different rotation angles for each of the plurality of sub-pixels.

3. A plurality of sub-pixels including a light-emitting region; disposed on the plurality of sub-pixels, and including a planarization layer including a plurality of light extraction patterns having convex portions and a plurality of concave portions; at least one first light extraction pattern among the plurality of light extraction patterns is rotated with respect to the center of each of the plurality of concave portions; an organic light-emitting display device, wherein rotation angles of light extraction patterns disposed on sub-pixels of the same color among the light extraction patterns disposed on each of the plurality of sub-pixels are different from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

4. A plurality of sub-pixels including a light-emitting region; disposed on the plurality of sub-pixels, and including a planarization layer including a plurality of light extraction patterns having convex portions and a plurality of concave portions; at least one first light extraction pattern among the plurality of light extraction patterns is rotated with respect to the center of each of the plurality of concave portions; an organic light-emitting display device, wherein rotation angles of light extraction patterns disposed on two adjacent sub-pixels in a first direction, a second direction perpendicular to the first direction, or a diagonal direction among the plurality of sub-pixels are different from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

5. a substrate on which the plurality of sub-pixels are disposed; a plurality of color filter layers respectively disposed so as to correspond to the sub-pixels corresponding to between the substrate and the planarization layer; and a bank layer defining a light emitting region of the sub-pixels, The organic light emitting display device according to claim 1, wherein each of the plurality of color filter layers is disposed extending from the light emitting region of the sub-pixel to a circuit region.

6. The plurality of sub-pixels have first, second, third, and fourth sub-pixels, Among the first to fourth sub-pixels, a color filter layer disposed on a sub-pixel that emits the shortest wavelength color extends to the circuit regions of the other adjacent color sub-pixels. The organic light emitting display device according to claim 5.

7. The first sub-pixel is red, the second sub-pixel is blue, the third sub-pixel is white, and the fourth sub-pixel is a green sub-pixel, The organic light emitting display device according to claim 6, wherein the color filter layer corresponding to the second sub-pixel is disposed extending to the circuit regions of the third and fourth sub-pixels.

8. a substrate on which the plurality of sub-pixels are disposed; a color filter layer disposed so as to correspond to the sub-pixels corresponding to between the substrate and the planarization layer; and a light emitting element having a first electrode, a light emitting layer, and a second electrode disposed on each of the plurality of sub-pixels, The first electrode is disposed in the light emitting region of each of the sub-pixels, For each of the sub-pixels, the first electrode includes a connection portion disposed between the light emitting region and a circuit region outside the light emitting region, The color filter layer arranged to correspond to the corresponding sub-pixel overlaps with the connection portion, and the organic light-emitting display device according to claim 1.

9. The plurality of sub-pixels include first, second, third, and fourth sub-pixels, Among the first to fourth sub-pixels, the color filter layer arranged in the sub-pixel that emits the color with the shortest wavelength is arranged to extend to and overlap with the connection portions of the other adjacent sub-pixels of different colors. The organic light-emitting display device according to claim 8.

10. The first sub-pixel is red, the second sub-pixel is blue, the third sub-pixel is white, and the fourth sub-pixel is a green sub-pixel, The color filter layer corresponding to the second sub-pixel is arranged to overlap with the connection portions of the third and fourth sub-pixels. The organic light-emitting display device according to claim 9.

11. The color filter layer corresponding to the second sub-pixel extends to the circuit regions of the third and fourth sub-pixels and is arranged. The organic light-emitting display device according to claim 10.

12. The bank layer contains a black pigment. The organic light-emitting display device according to claim 5.

13. The bank layer overlaps with the outermost pattern having the rotated structure of the light extraction pattern as a black bank layer. The organic light-emitting display device according to any one of claims 5 to 7.

14. The bank layer is arranged as a black bank layer between light extraction patterns having different rotation angles for each adjacent sub-pixel. The organic light-emitting display device according to any one of claims 5 to 7.

15. The organic light-emitting display device further includes a light-emitting element having a first electrode, a light-emitting layer, and a second electrode arranged in the plurality of sub-pixels, The bank layer is arranged as a black bank layer, The first electrode includes a light-emitting region of the sub-pixel and a connecting portion that connects the light-emitting region to a circuit region. The organic light-emitting display device according to any one of claims 5 to 7, wherein the black bank layer is disposed so as to overlap the connecting portion.

16. The organic light-emitting display device according to claim 15, wherein the color filter layer disposed to correspond to the corresponding sub-pixel overlaps the connecting portion.

17. A substrate having edges defined parallel to a first direction and a second direction, A plurality of sub-pixels in a light-emitting region defined on the substrate, A plurality of sub-pixels, and a planarization layer including a plurality of light extraction patterns each including a plurality of recesses in each of the plurality of sub-pixels. Among the plurality of light extraction patterns, the direction between the centers of any adjacent ones is not parallel to the first direction or the second direction, An organic light-emitting display device in which the direction between the centers of the light extraction patterns disposed in two adjacent sub-pixels among the plurality of sub-pixels is within a range of 0 degrees or more and less than 60 degrees, and the difference between them is 3 degrees or more.

18. The organic light-emitting display device according to claim 17, wherein the direction between the centers is different for each of the plurality of sub-pixels.

19. A substrate having edges defined parallel to a first direction and a second direction, A plurality of sub-pixels in a light-emitting region defined on the substrate, A plurality of sub-pixels, and a planarization layer including a plurality of light extraction patterns each including a plurality of recesses in each of the plurality of sub-pixels. Each of the plurality of light extraction patterns has a shape defining one or more axes of symmetry, The one or more axes of symmetry are 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. An organic light-emitting display device, wherein the angles of the symmetry axes of the light extraction patterns arranged in two adjacent sub-pixels among the plurality of sub-pixels differ from each other by 3 degrees or more within a range of 0 degrees or more and less than 60 degrees.

Images