Organic light emitting display device

Abstract

The present disclosure relates to an organic light emitting display device. According to one aspect of the present disclosure, an organic light emitting display device includes: an organic light emitting display panel including a plurality of sub-pixels; a pattern buffer layer disposed on the organic light emitting display panel and patterned to overlap with at least one of the plurality of sub-pixels; a color filter layer disposed on the pattern buffer layer and including a plurality of color filters corresponding to the plurality of sub-pixels; and a black matrix disposed on the same plane as the pattern buffer layer and dividing the plurality of color filters. Accordingly, generation and diffusion of cracks when the display device is folded can be effectively suppressed. Accordingly, drivability of the display panel and reliability of the organic light emitting display device may be improved.

Description

[0001] This application is a divisional application of the invention patent application with the original application number 202011526735.X (application date: December 22, 2020, invention title: Organic Light-Emitting Display Device). Technical Field

[0002] The present disclosure relates to an organic light-emitting display device, and more particularly, to an organic light-emitting display device having improved folding characteristics and reliability by suppressing the generation and spread of cracks due to folding. Background Art

[0003] Unlike a liquid crystal display device (LCD) including a backlight, an organic light-emitting display device (OLED) does not require a separate light source. Therefore, the organic light-emitting display device can be made light and thin and has process advantages and low power consumption due to low-voltage driving. First, the organic light-emitting display device includes self-luminous elements and includes layers formed of organic thin films, so that its flexibility and elasticity are superior to those of other display devices, and thus it is advantageous to be implemented as a flexible display device.

[0004] Generally, in order to suppress the deterioration of visibility and contrast caused by light incident on the display device from the outside, in an organic light-emitting display device, a polarizing plate is provided under a cover member. However, recently, as the interest in flexible and thin display devices has increased, instead of a thick polarizing plate, a display device has been proposed that applies a coated polarizing film having a relatively small thickness. However, there is a problem that the thickness of the coated polarizing film is still large, and if the thickness is reduced, the function of the polarizing film and the display quality deteriorate. Therefore, it is difficult to implement a polarizing film for a display device that can be folded under pressure. Summary of the Invention

[0005] In order to reduce folding stress, a display device has been proposed that applies an antireflection layer in which a color filter layer and a black matrix are integrated, instead of a coated polarizing film. The thickness of the antireflection layer is smaller than that of a polarizing plate or a coated polarizing film in the related art, and thus a thinner display device can be realized. When the antireflection layer is applied, an inorganic film buffer layer is completely deposited under the antireflection layer to be attached to the components below it while protecting the components of the display device. However, although the inorganic film buffer layer has excellent barrier properties, its flexibility is low, so that the inorganic film buffer layer is easily affected by stress. Therefore, when the display device is bent or folded, there is a problem that cracks are easily generated on the inorganic film buffer layer and the cracks spread. In addition, moisture or oxygen penetrates from the outside into the crack portion to deteriorate the components, and the cracks spread to cause problems in the driving of the display panel, thereby significantly deteriorating the reliability.

[0006] Accordingly, embodiments of the present disclosure relate to an organic light emitting display device that substantially eliminates one or more problems caused by limitations and disadvantages of the related art.

[0007] Accordingly, an object of the present disclosure is to suppress the generation and spread of cracks caused by folding by reducing the stress of an inorganic film buffer layer disposed under an antireflection layer in an organic light emitting display device in which the antireflection layer is applied instead of a polarizing plate or a polarizing film. Another object to be achieved by the present disclosure is to provide an organic light emitting display device having a reduced thickness, in which driving failure and low reliability are improved by suppressing the generation and spread of cracks. In addition, another object to be achieved by the present disclosure is to provide an organic light emitting display device that reduces folding stress to minimize wrinkles generated in a folding portion and that can be folded and repeatedly folded in various forms.

[0008] Additional features and aspects will be set forth in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the inventive concepts provided herein. Other features and aspects of the inventive concepts may be realized and obtained by means of the structures specifically pointed out in the written description or from which they can be derived, as well as the claims and the drawings.

[0009] To achieve these and other aspects of the inventive concepts, as embodied and broadly described, an organic light emitting display device includes: an organic light emitting display panel including a plurality of sub-pixels, a pattern buffer layer disposed on the organic light emitting display panel and patterned to overlap at least one of the plurality of sub-pixels, a color filter layer disposed on the pattern buffer layer and including a plurality of color filters corresponding to the plurality of sub-pixels, and a black matrix disposed on the same plane as the pattern buffer layer and partitioning the plurality of color filters. That is, according to the organic light emitting display device of an exemplary embodiment of the present disclosure, the buffer layer disposed under the color filter layer is patterned to have a predetermined shape, thereby reducing the stress of the buffer layer when folded. Accordingly, the generation and spread of cracks when the display device is folded can be effectively suppressed.

[0010] In another aspect, an organic light emitting display device including a plurality of sub-pixels includes: a substrate, a thin film transistor disposed on the substrate, an organic light emitting element disposed on the thin film transistor, a encapsulation layer disposed on the organic light emitting element, and an anti-reflection layer disposed on the encapsulation layer. The anti-reflection layer includes: a pattern buffer layer patterned to overlap at least one of the plurality of sub-pixels and including at least one opening area, a color filter layer disposed on the pattern buffer layer, and a black matrix disposed in the opening area. According to the organic light emitting display device according to another exemplary embodiment of the present disclosure, the external light reflectance is reduced by the anti-reflection layer, thereby minimizing the deterioration of visibility and contrast due to external light. In addition, the polarizing plate and the adhesive layer are omitted, thereby reducing the thickness of the display device. In addition, the buffer layer disposed on the encapsulation layer is patterned to have a predetermined shape to effectively relieve folding stress. When the organic light emitting display device is folded, generation and propagation of cracks on the buffer layer vulnerable to stress can be suppressed.

[0011] Other details of the exemplary embodiments are included in the detailed description and the drawings.

[0012] According to the present disclosure, instead of the polarizing plate or polarizing film of the related art, an anti-reflection layer including a pattern buffer layer, a color filter layer, and a black matrix is applied to the organic light emitting display device, thereby reducing the thickness of the display device while effectively reducing the external light reflectance. In addition, the buffer layer disposed under the color filter layer has a patterned structure, thereby reducing the stress applied to the buffer layer. Therefore, generation and propagation of cracks when the display device is folded can be effectively suppressed. By doing so, drive failures caused by generation and propagation of cracks are solved, and the reliability of the organic light emitting display device can be improved.

[0013] According to the present disclosure, stress on the buffer layer relatively vulnerable to stress is effectively reduced to minimize creases generated in the folding portion. In addition, an organic light emitting display device that can be folded in various forms and folded multiple times while maintaining high display quality can be easily realized.

[0014] It is to be understood that the above general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the claimed inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are included to provide a further understanding of the present disclosure and are incorporated into and constitute a part of this application. The drawings illustrate embodiments of the present disclosure and, together with the description, are used to explain various principles. In the drawings:

[0016] Figure 1A is a plan view of an organic light emitting display device according to an exemplary embodiment of the present disclosure;

[0017] Figure 1B is Figure 1A an enlarged plan view of region A of

[0018] Figure 1C is Figure 1B a cross-sectional view taken along line I-I' of

[0019] Figure 1D is Figure 1A an enlarged plan view of region B of

[0020] Figure 1E is Figure 1D a cross-sectional view taken along line II-II' of

[0021] Figure 2 an enlarged view of a partial region of an organic light-emitting display device according to another exemplary embodiment of the present disclosure;

[0022] Figure 3 an enlarged view of a partial region of an organic light-emitting display device according to still another exemplary embodiment of the present disclosure;

[0023] Figure 4A an enlarged view of a partial region of an organic light-emitting display device according to still another exemplary embodiment of the present disclosure;

[0024] Figure 4B is Figure 4A a cross-sectional view taken along line III-III' of

[0025] Figure 5A an enlarged view of a partial region of an organic light-emitting display device according to still another exemplary embodiment of the present disclosure; and

[0026] Figure 5B is Figure 5A a cross-sectional view taken along line IV-IV' of DETAILED DESCRIPTION

[0027] Advantages and features of the present disclosure and methods of achieving the advantages and features will become apparent by referring to the following detailed exemplary embodiments and the accompanying drawings. However, the present disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. The exemplary embodiments are provided only by way of example so that those skilled in the art can fully understand the disclosure of the present disclosure and the scope of the present disclosure. Therefore, the present disclosure will be defined only by the scope of the appended claims.

[0028] The shapes, dimensions, ratios, angles, quantities, etc. of the exemplary embodiments used to describe the present disclosure illustrated in the drawings are merely examples, and the present disclosure is not limited thereto. Throughout the specification, like reference numerals generally denote like elements. In addition, in the following description of the present disclosure, detailed descriptions of known related arts may be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure. Terms such as "comprising," "having," and "consisting of" used herein are generally intended to allow the addition of other components, unless the term is used together with the term "only." Any reference to the singular may include the plural unless otherwise expressly stated.

[0029] Even if not expressly stated, components are construed to include a normal range of errors.

[0030] When describing the positional relationship between two components using terms such as "on," "above," "below," and "adjacent to," one or more components may be disposed between the two components unless the term is used together with the term "immediately" or "directly."

[0031] When an element or layer is disposed "on" another element or layer, the other layer or another element may be directly disposed on or between the other element.

[0032] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from other components. Thus, in the technical concept of the present disclosure, the first component to be mentioned below may be the second component.

[0033] Throughout the specification, like reference numerals generally denote like elements.

[0034] For ease of description, the dimensions and thicknesses of each component shown in the drawings are illustrated, and the present disclosure is not limited to the dimensions and thicknesses of the components shown.

[0035] The features of the various embodiments of the present disclosure may be partially or wholly adhered or combined with each other, and may be interlocked and operated in various ways technically, and the embodiments may be performed independently or in association with each other.

[0036] Hereinafter, the present disclosure will be described in detail with reference to the drawings.

[0037] Figures 1A to 1E is a diagram for explaining a display device according to an exemplary embodiment of the present disclosure. Figure 1A is a plan view of an organic light-emitting display device according to an exemplary embodiment of the present disclosure. Figure 1B is Figure 1A an enlarged plan view of region A of Figure 1C is along Figure 1BCross-sectional view taken along line I-I'. Figure 1D is Figure 1A An enlarged plan view of region B of Figure 1E is a cross-sectional view taken along line II-II' of Figure 1D Cross-sectional view taken along line II-II'.

[0038] Referring to Figure 1A 、 Figure 1B and Figure 1C According to FIGS. 14, 15 and 16, an organic light emitting display device 100 according to an exemplary embodiment of the present disclosure includes an organic light emitting display panel, a touch sensor 150, and an antireflection layer AR. The antireflection layer AR includes a pattern buffer layer 160, a color filter layer 170, and a black matrix 180.

[0039] The organic light emitting display panel displays an image. The organic light emitting display panel includes a display area DA and a non-display area NDA. The display area DA is an area where a plurality of pixels PX are provided to substantially display an image. In the display area DA, pixels PX including a light emitting area for displaying an image and a driving circuit for driving the pixels PX may be provided. The non-display area NDA surrounds the display area DA. The non-display area NDA is an area where an image is not substantially displayed, and various wirings, driving ICs, and printed circuit boards for driving the pixels PX and the driving circuit provided in the display area DA are provided. For example, various ICs such as a gate driver IC and a data driver IC may be provided in the non-display area NDA. Meanwhile, as described above, a driving IC and a printed circuit board may be provided in the non-display area NDA, and a predetermined area is required to provide the driving IC and the printed circuit board.

[0040] The plurality of pixels PX are arranged in a matrix, and each of the plurality of pixels PX includes a plurality of sub-pixels. A sub-pixel is an element that displays one color, and includes a light emitting area that emits light and a non-light emitting area that does not emit light, but in the specification, only the light emitting area that emits light is defined as a sub-pixel. Referring to Figure 1B FIG. 24, one pixel PX includes a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4. For example, the first sub-pixel SP1 and the second sub-pixel SP2 are arranged in a first direction (x-axis direction), and the third sub-pixel SP3 and the fourth sub-pixel SP4 may be arranged along the first direction so as to be spaced apart from the first sub-pixel SP1 and the second sub-pixel SP2 in a second direction (y-axis direction), but is not limited thereto. The first sub-pixel SP1, the second sub-pixel SP2, the third sub-pixel SP3, and the fourth sub-pixel SP4 may display different colors, and if necessary, some sub-pixels may display the same color.

[0041] Each of the first sub-pixel SP1, the second sub-pixel SP2, the third sub-pixel SP3, and the fourth sub-pixel SP4 may be any one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel. For example, the sub-pixels may be set to have a pentile structure in which the first sub-pixel SP1 and the second sub-pixel SP2 are a red sub-pixel and a blue sub-pixel, respectively, and both the third sub-pixel SP3 and the fourth sub-pixel SP4 are green sub-pixels. When the plurality of sub-pixels SP1, SP2, SP3, and SP4 are set in a pentile structure, the number of the first sub-pixel SP1 and the second sub-pixel SP2 provided in the display area DA can be reduced as compared with the sub-pixels set to have a stripe structure. As the number of sub-pixels is reduced, the aperture ratio can be increased while maintaining the same level of perceived resolution as compared with the stripe structure. In addition, the number of sub-pixels is reduced, thereby simplifying the manufacturing process of the organic light-emitting display panel and being advantageous in terms of power consumption. In the pentile structure, considering the luminance and color temperature, the third sub-pixel SP3 and the fourth sub-pixel SP4 of green may have an area smaller than that of the first sub-pixel SP1 of red and the second sub-pixel SP2 of blue. Hereinafter, the organic light-emitting display device 100 according to an exemplary embodiment of the present disclosure will be described under the assumption that the first sub-pixel SP1 is a red sub-pixel, the second sub-pixel SP2 is a blue sub-pixel, and the third sub-pixel SP3 and the fourth sub-pixel SP4 are green sub-pixels. However, for ease of description, the colors of the sub-pixels are described as examples, and thus the present disclosure is not limited thereto.

[0042] In Figure 1B it is illustrated that the plurality of sub-pixels SP1, SP2, SP3, and SP4 are formed in a pentile structure, but it is not limited thereto. The colors and arrangements of the sub-pixels may vary in various forms as needed. In addition, in Figure 1B it is illustrated that the plurality of sub-pixels SP1, SP2, SP3, and SP4 have an octagonal shape, but it is not limited thereto, and the shapes of the sub-pixels may be changed in various shapes. For example, each sub-pixel may have a circular, oval, or polygonal shape other than an octagon.

[0043] The organic light-emitting display panel includes a substrate 110, a thin film transistor TFT, an organic light-emitting element 130, and a encapsulation layer 140, and the organic light-emitting element 130 may include an anode 131, an organic light-emitting layer 132, and a cathode 133.

[0044] The substrate 110 is a basic component that supports various elements of the organic light-emitting display panel and is formed of an insulating material. For example, the substrate 110 may be a glass substrate or a plastic substrate. For example, the plastic substrate may be selected from polyimide, polyethersulfone, polyethylene terephthalate, and polycarbonate, but is not limited thereto. In order to achieve a flexible property and a foldable property, when a plastic substrate having flexibility is used, a support member such as a backplane may be disposed under the substrate 110. The plastic substrate having flexibility is thinner and has weaker rigidity than the glass substrate, so that when various elements are disposed, the plastic substrate may sag. The backplane supports the substrate 110 formed of a plastic material so that it does not sag and protects the organic light-emitting display panel from moisture, heat, and impact. For example, the backplane may be a metal material such as stainless steel (SUS) or a plastic material such as polymethyl methacrylate, polycarbonate, polyvinyl alcohol, acrylonitrile-butadiene-styrene, or polyethylene terephthalate.

[0045] When the backplane is disposed under the substrate 110, an adhesive layer may be disposed between the substrate 110 and the backplane to attach them. The adhesive layer may be an optically transparent adhesive or a pressure-sensitive adhesive, but is not limited thereto.

[0046] A substrate buffer layer 121 may be disposed on the substrate 110 to inhibit the penetration of oxygen or moisture. The substrate buffer layer 121 may be formed as a single layer and may also be formed as a multilayer structure if necessary.

[0047] On the substrate buffer layer 121, a thin-film transistor TFT including a gate G, an active layer ACT, a source S, and a drain D is disposed. The thin-film transistor TFT is disposed in each region of the first sub-pixel SP1, the second sub-pixel SP2, the third sub-pixel SP3, and the fourth sub-pixel SP4. In Figure 1C For ease of description, only the driving thin-film transistor TFT among various thin-film transistors TFT that may be included in the organic light-emitting display device 100 is illustrated. In addition, in Figure 1C The thin-film transistor TFT having a coplanar structure is taken as an example for description. However, the present disclosure is not limited thereto, and a thin-film transistor TFT having an inverted staggered structure may also be used.

[0048] For example, an active layer ACT is disposed on a substrate buffer layer 121, and a gate insulating layer 123 is disposed on the active layer ACT to insulate the active layer ACT and the gate G from each other. In addition, an interlayer insulating layer 122 is disposed on the substrate buffer layer 121 to insulate the gate G from the source S and the drain D. The source S and the drain D in contact with the active layer ACT are formed on the interlayer insulating layer 122. A planarization layer 124 may be disposed on the thin film transistor TFT. The planarization layer 124 planarizes the upper portion of the thin film transistor TFT. The planarization layer 124 may include a contact hole that electrically connects the thin film transistor TFT and the anode 131 of the organic light emitting element 130.

[0049] The organic light emitting element 130 is disposed on the planarization layer 124. The organic light emitting element 130 includes a first organic light emitting element 130a disposed in the first sub-pixel SP1, a second organic light emitting element 130b disposed in the second sub-pixel SP2, and a third organic light emitting element 130c disposed in the third sub-pixel SP3. Each of the organic light emitting elements 130a, 130b, 130c includes an anode 131, a cathode 133, and an organic light emitting layer 132.

[0050] The anode 131 is disposed on the planarization layer 124. The anode 131 is formed of a conductive material having a high work function to supply holes to the organic light emitting layer 132. The anode 131 may be a transparent conductive layer formed of a transparent conductive oxide TCO. For example, the anode 131 may be formed of one or more selected from transparent conductive oxides such as indium tin oxide ITO, indium zinc oxide IZO, indium tin zinc oxide ITZO, tin dioxide SnO2, zinc oxide ZnO, indium copper oxide ICO, and aluminum-doped zinc oxide AZO, but is not limited thereto.

[0051] The anode 131 may be separately formed for each of the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3. A bank 125 is disposed on the anode 131 and the planarization layer 124. The bank 125 divides adjacent sub-pixel regions. In addition, the bank 125 may also divide a pixel region composed of a plurality of sub-pixels. The bank 125 may be formed of an insulating material that insulates the anodes 131 of adjacent sub-pixels SP1, SP2, and SP3 from each other. In addition, the bank 125 may be formed of a black bank having a high light absorption rate to suppress color mixing between adjacent sub-pixels SP1, SP2, and SP3.

[0052] The cathode 133 is disposed on the anode 131. The cathode 133 may be formed of a metal material having a low work function to stably supply electrons to the organic light emitting layer 132. For example, the cathode 133 may be formed of a metal material selected from calcium (Ca), barium (Ba), aluminum (Al), silver (Ag), and alloys including one or more of them, but is not limited thereto.

[0053] The cathode 133 is formed as a single layer on the anode 131 without patterning. That is, the cathode 133 is formed as a single layer in the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3. When the organic light-emitting display device 100 is driven as a top-emission type, the cathode 133 is formed to have a very small thickness to be substantially transparent.

[0054] The organic light-emitting layer 132 is disposed between the anode 131 and the cathode 133. The organic light-emitting layer 132 is a layer in which electrons and holes are coupled to emit light. The organic light-emitting layer 132 of the first organic light-emitting element 130a may be a red organic light-emitting layer, the organic light-emitting layer 132 of the second organic light-emitting element 130b may be a blue organic light-emitting layer, and the organic light-emitting layer 132 of the third organic light-emitting element 130c may be a green organic light-emitting layer. For example, in the blue organic light-emitting layer, electrons and holes are coupled to emit blue light.

[0055] To improve the light-emitting efficiency of the organic light-emitting display panel, a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer may be further included. For example, the hole injection layer and the hole transport layer may be disposed between the anode 131 and the organic light-emitting layer 132, and the electron transport layer and the electron injection layer may be disposed between the organic light-emitting layer 132 and the cathode 133.

[0056] The encapsulation layer 140 is disposed on the cathode 133 to minimize the deterioration of the organic light-emitting display panel due to moisture and oxygen. The encapsulation layer 140 flattens the upper surface of the organic light-emitting display panel and fills the space between the cathode 133 and the touch sensor 150. The encapsulation layer 140 may be formed with a multi-layer structure in which an inorganic layer formed of an inorganic insulating material and an organic layer formed of an organic material are laminated. For example, the encapsulation layer 140 may be composed of at least one organic layer and at least two inorganic layers, and has a multi-layer structure in which the inorganic layer and the organic layer are alternately laminated, but is not limited thereto. For example, the encapsulation layer 140 may have a three-layer structure including a first inorganic layer 141, an organic layer 142, and a second inorganic layer 143. For example, the first inorganic layer 141 and the second inorganic layer 143 may be independently formed of one or more selected from silicon nitride SiN x , silicon oxide SiO x , silicon oxynitride SiON, and aluminum oxide Al2O3, but is not limited thereto. For example, the organic layer 142 may be formed of one or more selected from epoxy resin, polyimide, polyethylene, and silicon oxycarbide (SiOC), but is not limited thereto.

[0057] The touch sensor 150 is disposed on the encapsulation layer 140 to provide a touch sensing function to the organic light emitting display device 100. The touch sensor 150 may be directly formed on the encapsulation layer 140 without using an adhesive member. Since the touch sensor 150 is directly formed on the encapsulation layer 140, an adhesive member for attaching the touch sensor 150 and the organic light emitting display panel is omitted, thereby reducing the thickness of the organic light emitting display device 100.

[0058] The touch sensor 150 includes a touch layer 151 and a touch protection layer 152. The touch layer 151 may be directly formed on the encapsulation layer 140 without using an adhesive member. The touch layer 151 includes touch electrodes for sensing touch inputs. The touch electrodes may be directly formed on the encapsulation layer 140. In this case, the distance between the organic light emitting display panel and the touch electrodes is too close, resulting in a parasitic capacitance being generated between the organic light emitting display panel and the touch electrodes. Therefore, the touch sensitivity may be reduced. Accordingly, it is necessary to appropriately adjust the thickness of the encapsulation layer 140 to minimize the parasitic capacitance. The touch electrodes may be composed of sensing electrodes and driving electrodes, and may detect touch coordinates by sensing a change in capacitance between the sensing electrodes and the driving electrodes. For example, the driving electrodes are disposed on the encapsulation layer 140, and the sensing electrodes are disposed on the same plane as the driving electrodes. As another example, a touch insulating layer is disposed on the driving electrodes, and the sensing electrodes are disposed on the touch insulating layer. The arrangement of the touch electrodes is not limited thereto and may be changed as needed.

[0059] During the process of directly forming the touch layer 151 on the encapsulation layer 140, a touch buffer layer may be disposed between the encapsulation layer 140 and the touch layer 151 to inhibit damage to the encapsulation layer 140 and the organic light emitting element 130.

[0060] The touch protection layer 152 is disposed on the touch layer 151. The touch protection layer 152 inhibits short circuits or damage to the touch electrodes and flattens the upper surface of the touch layer 151. The touch protection layer 152 may be formed of a transparent insulating resin such as acrylic resin, polyester resin, or silicone resin. In addition, although the organic light emitting display device 100 according to an embodiment of the present disclosure is illustrated as including the touch sensor 150, the present disclosure is not limited thereto, and if necessary, the touch sensor 150 may be omitted from the organic light emitting display device.

[0061] An antireflection layer AR is disposed on the touch protection layer 152. The antireflection layer AR includes a pattern buffer layer 160, a color filter layer 170, and a black matrix 180. The antireflection layer AR absorbs external light to minimize deterioration of the visibility and contrast of the organic light emitting display device 100 due to external light.

[0062] The pattern buffer layer 160 is disposed above the touch sensor 150 to protect components such as the touch sensor 150 or the organic light emitting display panel thereunder. The pattern buffer layer 160 is formed of an inorganic material. The inorganic material has excellent barrier properties to minimize the penetration of moisture. In addition, the pattern buffer layer 160 can compensate for the deterioration of the adhesion between the color filter layer 170 and the black matrix 180 formed of an organic material and the touch protection layer 152. That is, the pattern buffer layer 160 is disposed on the touch protection layer 152 to attach the color filter layer 170 and the black matrix 180 to the touch protection layer 152. For example, the pattern buffer layer 160 may be formed of one or more inorganic materials selected from silicon nitride SiN x , silicon oxide SiO x , silicon oxynitride SiON, and aluminum oxide Al2O3.

[0063] Since the flexibility of the inorganic material is lower than that of the organic material, when a buffer layer is formed of the inorganic material over the entire touch encapsulation layer 140, if the organic light emitting display device 100 is bent or folded, cracks may be easily generated and spread, causing a driving failure. Accordingly, the pattern buffer layer 160 is patterned to have a plurality of pattern blocks and at least one first opening area OA1. That is, the plurality of pattern blocks are arranged to be spaced apart from each other, and the first opening area OA1 is formed between the plurality of pattern blocks. The first opening area OA1 alleviates the stress generated when the organic light emitting display device 100 is bent or folded, and inhibits the generation and spread of cracks. The configuration of the pattern buffer layer 160 is not limited thereto, and may be varied to inhibit the generation and spread of cracks.

[0064] Hereinafter, the pattern buffer layer 160 will be described in detail with reference to Figure 1B and Figure 1C . The pattern buffer layer 160 may be composed of a plurality of independent pattern blocks 161, 162, 163, and 164, and has a first opening area OA1 formed between the plurality of pattern blocks 161, 162, 163, and 164. The first opening area OA1 effectively alleviates the stress of the pattern buffer layer 160 to inhibit the generation and spread of cracks when the organic light emitting display device 100 is bent or folded.

[0065] Each of the plurality of pattern blocks 161, 162, 163, and 164 is disposed on the touch protection layer 152 so as to overlap with the plurality of sub-pixels SP1, SP2, SP3, and SP4. For example, the pattern buffer layer 160 includes a first pattern block 161 overlapping with the first sub-pixel SP1, a second pattern block 162 overlapping with the second sub-pixel SP2, a third pattern block 163 overlapping with the third sub-pixel SP3, and a fourth pattern block 164 overlapping with the fourth sub-pixel SP4.

[0066] The first pattern block 161, the second pattern block 162, the third pattern block 163, and the fourth pattern block 164 are independently arranged such that the pattern buffer layer 160 has an island shape. For example, the first pattern block 161 and the second pattern block 162 are arranged in a first direction. The third pattern block 163 and the fourth pattern block 164 are arranged along the first direction and are spaced apart from the first pattern block 161 and the second pattern block 162 in a second direction different from the first direction. When the pattern buffer layer 160 has an island shape, the stress during folding is reduced, and the generation and propagation of cracks can be suppressed.

[0067] As Figure 1B shown, the plurality of pattern blocks may be formed to have an octagonal shape, but are not limited thereto. The plurality of pattern blocks may be formed to have a circular, oval, or polygonal shape other than an octagon. The width of each of the plurality of pattern blocks 161, 162, 163, and 164 may be greater than the width of the light-emitting regions of the overlapping sub-pixels SP1, SP2, SP3, and SP4, but is not limited thereto. When the width of each of the plurality of pattern blocks 161, 162, 163, and 164 is greater than the width of the light-emitting region, a wider viewing angle can be provided.

[0068] The color filter layer 170 is disposed on the encapsulation layer 140. In addition, the color filter layer 170 is disposed in direct contact with the pattern buffer layer 160 and is disposed to cover a partial region of the black matrix 180. The color filter layer 170 absorbs external light to minimize the degradation of visibility and contrast caused by external light and to improve color reproduction properties. The color filter layer 170 is disposed on the encapsulation layer 140 to improve the light-emitting efficiency and to omit a polarizing plate or a polarizing film.

[0069] The color filter layer 170 is disposed to correspond to the sub-pixels disposed therebelow. The color filter layer 170 may include a plurality of color filters. In this case, each color filter may correspond to the color of each corresponding sub-pixel. That is, the color filter layer 170 includes a first color filter 171 corresponding to the first sub-pixel SP1, a second color filter 172 corresponding to the second sub-pixel SP2, a third color filter 173 corresponding to the third sub-pixel SP3, and a fourth color filter 174 corresponding to the fourth sub-pixel SP4. When the first sub-pixel SP1 is a red sub-pixel, the first color filter 171 is a red color filter, and when the second sub-pixel SP2 is a blue sub-pixel, the second color filter 172 is a blue color filter. When the third sub-pixel SP3 and the fourth sub-pixel SP4 are green sub-pixels, the third color filter 173 and the fourth color filter 174 are green color filters.

[0070] The first color filter 171 is disposed to be in direct contact with the upper portion of the first pattern block 161, and the second color filter 172 is disposed to be in direct contact with the upper portion of the second pattern block 162. The third color filter 173 is disposed to be in direct contact with the upper portion of the third pattern block 163, and the fourth color filter 174 is disposed to be in direct contact with the upper portion of the fourth pattern block 164. The width of each of the pattern blocks 161, 162, 163, 164 may be greater than the width of the corresponding color filter 171, 172, 173, 174. As described above, the pattern buffer layer 160 attaches the color filter layer 170 and the touch protection layer 152 to each other. When the widths of the pattern blocks 161, 162, 163, 164 are greater than the widths of the color filters 171, 172, 173, 174, the adhesiveness is more excellent and the generation and spread of cracks are suppressed to improve the folding characteristics. In addition, in order to provide a wide viewing angle, the width of each of the color filters 171, 172, 173, and 174 may be greater than the width of the light emitting regions of the overlapping sub-pixels SP1, SP2, SP3, and SP4.

[0071] Each of the color filters 171, 172, 173, 174 includes a transparent base resin and a color developing material. For example, the transparent base resin may be one selected from polyacrylate, polymethyl methacrylate, polyimide, polyvinyl alcohol, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, etc., but is not limited thereto.

[0072] The color developing material absorbs light in a specific wavelength band and transmits light in other wavelength bands. For example, the red color filter includes a red developing material that transmits light in the red wavelength band and absorbs light in the green and blue wavelength bands. For example, the red developing material may be a compound based on parylene or a compound based on diketopyrrolopyrrole. For example, the green developing material may be a compound based on phthalocyanine. For example, the blue developing material may be a compound based on copper phthalocyanine or a compound based on anthraquinone. However, the color developing material is not limited thereto, and any material that transmits light in the red, blue, and green wavelength bands may be used without limitation.

[0073] Since each of the color filters 171, 172, 173, 174 is set to correspond to the color of each corresponding sub-pixel SP1, SP2, SP3, SP4, internal light emitted from each of the first sub-pixel SP1, the second sub-pixel SP2, the third sub-pixel SP3, and the fourth sub-pixel SP4 passes through the color filter. For example, the red light emitted from the first sub-pixel SP1 passes through the first color filter 171. On the contrary, when external light is incident, the external light corresponding to the absorption wavelength of the color developing material included in each of the color filters 171, 172, 173, 174 is absorbed by each of the color filters 171, 172, 173, 174. The external light not absorbed by the color filters 171, 172, 173, and 174 is reflected by the cathode 133 to pass through the color filters 171, 172, 173, and 174 again. The reflected light corresponding to the absorption wavelength of the color developing material included in each of the color filters 171, 172, 173, 174 is absorbed by each of the color filters 171, 172, 173, 174. Therefore, the deterioration of the display quality due to external light can be minimized.

[0074] In Figure 1B and Figure 1C it is illustrated that the color filters 171, 172, 173, and 174 are independently set to correspond to a plurality of sub-pixels SP1, SP2, SP3, and SP4 respectively, but it is not limited thereto. The color filter layer 170 may be formed as a single layer. For example, the color filter layer 170 may be set as a single layer to cover the upper portion of the pattern buffer layer 160 and the black matrix 180. In this case, the color filter layer 170 may include a base resin, a red developing material, a green developing material, and a blue developing material, but it is not limited thereto. If necessary, some developing materials may be omitted in addition to the red developing material, the green developing material, and the blue developing material, and other developing materials may be further included.

[0075] The black matrix 180 is disposed on the touch protection layer 152 and the pattern blocks 161, 162, 163, and 164. The black matrix 180 may be set to correspond to the bank portion 125. Therefore, the color mixing between the sub-pixels SP1, SP2, SP3, and SP4 can be minimized. In addition, the black matrix 180 absorbs external light. Therefore, the deterioration of the visibility and contrast of the organic light-emitting display device 100 due to external light can be minimized.

[0076] The black matrix 180 may be formed of an organic material. The black matrix 180 includes a base resin and a black material. The base resin may be selected from one or more of the following: Cardo-based resin, epoxy-based resin, acrylate-based resin, siloxane-based resin, and polyimide, but it is not limited thereto. The black material may be a black pigment selected from carbon-based pigments, metal oxide-based pigments, and organic-based pigments. For example, the carbon-based pigment may be carbon black. For example, the metal oxide-based pigment may be titanium black TiNx O y or a Cu-Mn-Fe-based black pigment, but not limited thereto. For example, the organic-based pigment may be selected from lactam black, perylene black, and aniline black, but not limited thereto. In addition, as the black material, an RGB black pigment including a red pigment, a blue pigment, and a green pigment may be used.

[0077] The black matrix 180 is disposed in the first opening region OA1 between the pattern blocks 161, 162, 163, and 164 on the same plane as the pattern buffer layer 160 to divide adjacent pattern blocks. That is, the black matrix 180 formed of an organic material that is relatively flexible compared to the inorganic material is disposed in the first opening region OA1 between the pattern blocks 161, 162, 163, and 164. Accordingly, stress caused when the organic light emitting display device 100 is bent or folded can be reduced. In addition, cracks generated when the display device is bent or folded can be minimized. Generally, cracks are likely to occur and spread in a layer formed of an inorganic material. However, in the pattern buffer layer 160 of the present disclosure, the black matrix 180 formed of an organic material is disposed in the first opening region OA1 between the pattern blocks 161, 162, 163, and 164, so that the spread of cracks can be suppressed.

[0078] In Figure 1C an example is illustrated in which an antireflection layer AR including the pattern buffer layer 160, the color filter layer 170, and the black matrix 180 is disposed above the touch protection layer 152, but not limited thereto. For example, the antireflection layer AR may be disposed above the encapsulation layer 140 of the organic light emitting display panel, or the touch sensor 150 may be disposed above the antireflection layer AR. When the touch sensor 150 is disposed above the antireflection layer AR, an overcoat layer may be provided to cover the step of the antireflection layer AR and flatten the upper surface, and the touch sensor 150 is disposed on the overcoat layer. In this case, the distance between the touch electrode and the organic light emitting display panel is increased, thereby reducing the parasitic capacitance formed therebetween, and the distance from the outermost surface where the touch is input to the touch electrode is reduced, so that touch sensitivity can be improved.

[0079] In addition, when the antireflection layer AR is disposed above the encapsulation layer 140, the second inorganic layer 143 may be used as the pattern buffer layer. That is, the second inorganic layer 143 is patterned to form the pattern buffer layer without separately forming the pattern buffer layer on the second inorganic layer 143.

[0080] The organic light emitting display device 100 according to an exemplary embodiment of the present disclosure may further include an auxiliary pattern buffer layer 190 formed in the non-display area NDA. Hereinafter, the auxiliary pattern buffer layer 190 will be described in detail with reference to Figure 1D and Figure 1E in detail.

[0081] Reference Figure 1D and Figure 1E ,wherein the fourth organic light-emitting element 130d provided in the fourth sub-pixel SP4 is further illustrated. The auxiliary pattern buffer layer 190 may be disposed on the touch protection layer 152 in the same plane as the pattern buffer layer 160. The auxiliary pattern buffer layer 190 is formed along at least one edge of the non-display area NDA. For example, the auxiliary pattern buffer layer 190 may be formed along an edge extending in the first direction of the non-display area NDA or along an edge extending in the second direction. In addition, the auxiliary pattern buffer layer 190 may be formed along an edge extending in the first direction and an edge extending in the second direction. That is, the auxiliary pattern buffer layer 190 has a frame shape. As described above, when including the auxiliary pattern buffer layer formed along at least one edge of the non-display area NDA, the folding characteristics can be further improved, and the generation and diffusion of cracks at the edge of the organic light-emitting display device 100 can be suppressed. In addition, it is more advantageously applied to the organic light-emitting display device 100 having a large folding stress, such as the organic light-emitting display device 100 having a large thickness or the organic light-emitting display device 100 with multiple-layer folding.

[0082] The auxiliary pattern buffer layer 190 includes a plurality of auxiliary pattern buffer members. For example, the auxiliary pattern buffer layer 190 includes a first auxiliary pattern buffer member 191, a second auxiliary pattern buffer member 192, and a third auxiliary pattern buffer member 193, and includes a second opening area OA2 therebetween. The first auxiliary pattern buffer member 191, the second auxiliary pattern buffer member 192, and the third auxiliary pattern buffer member 193 are arranged to be spaced apart from each other such that the second opening area OA2 is formed between the plurality of auxiliary pattern buffer members. The second opening area OA2 can relieve the folding stress so that the generation and diffusion of cracks can be minimized when the organic light-emitting display device 100 is bent or folded.

[0083] Figure 2 is a partial enlarged view of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. Reference Figure 2 ,in an organic light-emitting display device 200 according to another exemplary embodiment of the present disclosure, the pattern buffer layer 260 includes a plurality of pattern blocks 261, 262, 263, and 264 and connection blocks CP1 and CP2. Except that connection blocks are further provided between the plurality of pattern blocks of the pattern buffer layer, Figure 2 the organic light-emitting display device 200 of Figures 1A to 1E shown in is substantially the same as the organic light-emitting display device 100 shown in

[0084] Reference Figure 2, the connection blocks disposed between the pattern blocks 261, 262, 263, and 264 include a first connection block CP1 and a second connection block CP2. The first connection block CP1 is disposed between the first pattern block 261 and the second pattern block 262 to connect the first pattern block 161 and the second pattern block 262. The second connection block CP2 is disposed between the third pattern block 263 and the fourth pattern block 264 to connect the third pattern block 263 and the fourth pattern block 264. The width of each of the first pattern block 261 and the second pattern block 262 is greater than the width of the first connection block CP1, and the width of each of the third pattern block 263 and the fourth pattern block 264 is greater than the width of the second connection block CP2.

[0085] The first pattern block 261, the second pattern block 262, and the first connection block CP1 constitute a first block unit BU1, and the third pattern block 263, the fourth pattern block 264, and the second connection block CP2 constitute a second block unit BU2. That is, each of the first block unit BU1 and the second block unit BU2 overlaps with two sub-pixels. For example, the first block unit BU1 overlaps with the first sub-pixel SP1 and the second sub-pixel SP2, and the second block unit BU2 overlaps with the third sub-pixel SP3 and the fourth sub-pixel SP4.

[0086] The first block unit BU1 and the second block unit BU2 are spaced apart from each other without overlap and are arranged in a zigzag pattern in the second direction (y-axis direction). When the first block unit BU1 and the second block unit BU2 are arranged in a zigzag pattern, the aperture ratio of the pixel can be increased and the folding stress can be more effectively reduced.

[0087] At least one of the first connection block CP1 and the second connection block CP2 can be patterned to have at least one opening region. For example, at least one of the first connection block CP1 and the second connection block CP2 can be patterned to have a strip shape. In this case, the folding stress can be further reduced, and the generation and diffusion of cracks can be more effectively suppressed.

[0088] Figure 3 is an enlarged view of a partial region of an organic light-emitting display device according to another exemplary embodiment of the present disclosure. Refer to Figure 3 , except that adjacent first block units BU1 are extended by a first extension block EP1 without being disconnected and adjacent second block units BU2 are extended by a second extension block EP2 without being disconnected, the organic light-emitting display device 300 according to another exemplary embodiment is Figure 2 substantially the same as the organic light-emitting display device 200 shown in

[0089] Refer to Figure 3, in the organic light-emitting display device 300 according to another exemplary embodiment of the present disclosure, the pattern buffer layer 360 includes a first block unit BU1 and a second block unit BU2. The first block unit BU includes a first pattern block 361, a second pattern block 362, and a first connection block CP1, and the second block unit BU2 is composed of a third pattern block 363, a fourth pattern block 364, and a second connection block CP2.

[0090] The first block unit BU1 composed of the first pattern block 361, the second pattern block 362, and the first connection block CP1 disposed therebetween is repeatedly provided in the first direction (x-axis direction), and the first extension block EP1 connects the first block units BU1 repeatedly provided along the first direction.

[0091] That is, the second pattern block 362 of the first pixel PX1 and the first pattern block 361 of the second pixel PX2 are connected to each other through the first extension block EP1. Accordingly, the first block unit BU1 and the first extension block EP1 are alternately and repeatedly provided, and the first block unit BU1 is extended by the first extension block EP1 without being disconnected to form a first line pattern LP1.

[0092] The second block unit BU2 composed of the third pattern block 363, the fourth pattern block 364, and the second connection block CP2 disposed therebetween is spaced apart from the first block unit BU1 in the second direction. The second extension block EP2 connects the second block units BU2 repeatedly provided along the first direction.

[0093] That is, the fourth pattern block 364 of the first pixel PX1 and the third pattern block 363 of the second pixel PX2 are connected to each other through the second extension block EP2. Accordingly, the second block unit BU2 and the second extension block EP2 are alternately and repeatedly provided, and the second block unit BU2 is extended by the second extension block EP2 without being disconnected to form a second line pattern LP2.

[0094] The second line pattern LP2 is provided to be spaced apart from the first line pattern LP1 in the second direction.

[0095] The first line pattern LP1 and the second line pattern LP2 may extend in a first direction without an opening area. Thus, when a crack occurs, the crack may spread along the extending direction of the line pattern. Therefore, in order to minimize the generation and spread of cracks, at least one of the plurality of first connection blocks CP1 and / or at least one of the first extension blocks EP1 may be patterned to have an opening area. In addition, at least one of the plurality of second connection blocks CP2 and / or at least one of the plurality of second extension blocks EP2 may be patterned to have an opening area. For example, at least one of the plurality of first connection blocks CP1 and at least one of the plurality of second connection blocks CP2 may be patterned to have a strip shape. In addition, at least one of the plurality of first extension blocks EP1 and at least one of the plurality of second extension blocks EP2 may be patterned to have a strip shape. In this case, cracks can be further suppressed, and even if a crack occurs, the spread of the crack along the extending direction of the line pattern can be minimized.

[0096] Figure 4A is an enlarged view of a partial area of an organic light emitting display device according to another exemplary embodiment of the present disclosure. Figure 4B is along Figure 4A The cross-sectional view taken along line III-III'. Refer to Figure 4A and Figure 4B In addition to the shapes and widths of the first line pattern LP1' and the second line pattern LP2' and the shape of the black matrix 480, the organic light emitting display device 400 according to another exemplary embodiment of the present disclosure is substantially the same as the organic light emitting display device 300 shown in Figure 3 Therefore, the description of the repeated structure will be omitted.

[0097] Refer to Figure 4A and Figure 4B In the organic light emitting display device 400 according to another exemplary embodiment of the present disclosure, the pattern buffer layer 460 includes a first block unit BU1' and a second block unit BU2'. The first block unit BU1' is composed of a first pattern block 461, a second pattern block 462, and a first connection block CP1', and the second block unit BU2' is composed of a third pattern block 463, a fourth pattern block 464, and a second connection block CP2'.

[0098] The first block unit BU1' composed of the first pattern block 461, the second pattern block 462, and the first connection block CP1' disposed therebetween is repeatedly provided in a first direction (x-axis direction), and the first extension block EP1' connects the first block units BU1' repeatedly provided along the first direction.

[0099] That is to say, the second pattern block 462 of the first pixel PX1 and the first pattern block 461 of the second pixel PX2 are connected to each other through the first extension block EP1'. Therefore, the first block unit BU1' and the first extension block EP1' are alternately and repeatedly arranged, and the first block unit BU1' is extended by the first extension block EP1' without being disconnected to form the first line pattern LP1'.

[0100] A second block unit BU2' composed of a third pattern block 463, a fourth pattern block 464, and a second connection block CP2' disposed therebetween is spaced apart from the first block unit BU1' in a second direction and repeatedly arranged along a first direction. A second extension block EP2' connects the second block units BU2' repeatedly arranged along the first direction.

[0101] That is to say, the fourth pattern block 464 of the first pixel PX1 and the third pattern block 463 of the second pixel PX2 are connected to each other through the second extension block EP2'. Therefore, the second block unit BU2' and the second extension block EP2' are alternately and repeatedly arranged, and the second block unit BU2' is extended by the second extension block EP2' without being disconnected to form the second line pattern LP2'.

[0102] The first pattern block 461, the second pattern block 462, and the first connection block CP1' constituting the first block unit BU1' have the same width. In addition, the first block unit BU1' and the first extension block EP1' constituting the first line pattern LP1' have the same width. Therefore, the first line pattern LP1' has a linear shape with a constant width.

[0103] The third pattern block 463, the fourth pattern block 464, and the second connection block CP2' constituting the second block unit BU2' have the same width. In addition, the second block unit BU2' and the second extension block EP2' constituting the second line pattern LP2' have the same width. Therefore, the second line pattern LP2' has a linear shape with a constant width.

[0104] The second line pattern LP2' is arranged to be spaced apart from the first line pattern LP1' in the second direction. Therefore, the pattern buffer layer 460 has a strip shape, in which the first line pattern LP1' and the second line pattern LP2' with a linear shape of constant width are repeatedly arranged to be spaced apart from each other in the second direction. Compared with Figure 3 the pattern buffer layer 360 shown, Figure 4A the advantage of the pattern buffer layer 460 with a strip shape shown is that it is easy to control the widths of the first line pattern LP1' and the second line pattern LP2' and the interval between the first line pattern LP1' and the second line pattern LP2'.

[0105] The first line pattern LP1' and the second line pattern LP2' may extend along a first direction without an opening region. In this case, when a crack occurs, the crack may spread along the extending direction. Therefore, in order to minimize the generation and spread of cracks, at least one of the plurality of first connection blocks CP1' and / or at least one of the plurality of first extension blocks EP1' may be patterned to have an opening region. In addition, at least one of the plurality of second connection blocks CP2' and / or at least one of the plurality of second extension blocks EP2' may be patterned to have an opening region. For example, at least one of the plurality of first connection blocks CP1' and at least one of the plurality of first extension blocks EP1' may be patterned to have a strip shape. In addition, at least one of the plurality of second connection blocks CP2' and at least one of the plurality of second extension blocks EP2' may be patterned to have a strip shape. In this case, the first line pattern LP1' and the second line pattern LP2' that are spaced apart from each other and extend along the first direction are patterned to have an opening region, thereby reducing folding stress and minimizing the generation and spread of cracks.

[0106] The widths of the first line pattern LP1' and the second line pattern LP2' may be formed to be smaller than the widths of the correspondingly provided color filters 171, 172, 173, and 174, but are not limited thereto. In addition, as Figure 4B shown, the widths of the first pattern block 461, the second pattern block 462, the third pattern block 463, and the fourth pattern block 464 may be formed to be smaller than the light emitting regions of the overlapping sub-pixels SP1, SP2, SP3, and SP4.

[0107] Figure 5A is an enlarged view of a partial region of an organic light emitting display device according to another exemplary embodiment of the present disclosure. Figure 5B is a cross-sectional view taken along line IV-IV' of Figure 5A . Referring to Figure 5A and Figure 5B , an organic light emitting display device 500 according to another exemplary embodiment of the present disclosure includes an organic light emitting display panel, a touch sensor 150, and an antireflection layer AR. In addition, the antireflection layer AR includes a pattern buffer layer 560, a color filter layer 170, and a black matrix 580. The pattern buffer layer 560 includes a plurality of pattern blocks 561, 562, 563, and 564 and auxiliary pattern blocks AP1, AP2, AP3, and AP4 provided between the plurality of pattern blocks 561, 562, 563, and 564. Except that the pattern buffer layer 560 further includes auxiliary pattern blocks between the plurality of pattern blocks, the organic light emitting display device 500 according to another exemplary embodiment of the present disclosure is substantially the same as the Figure 4A and Figure 4B shown organic light emitting display device 400. Therefore, the repeated components will not be described again.

[0108] Reference Figure 5A and Figure 5B Figure 5B

[0109] The auxiliary pattern blocks may be formed in a strip shape to surround at least one of the first pattern block 561, the second pattern block 562, the third pattern block 563, and the fourth pattern block 564. For example, the auxiliary pattern blocks include a first auxiliary pattern block AP1 surrounding the first pattern block 561, a second auxiliary pattern block AP2 surrounding the second pattern block 562, a third auxiliary pattern block AP3 surrounding the third pattern block 563, and a fourth auxiliary pattern block AP4 surrounding the fourth pattern block 564. In Figure 5A and Figure 5B Figure 5B

[0110] In the pattern buffer layer 560, since the auxiliary pattern blocks AP1, AP2, AP3, and AP4 are disposed between the plurality of pattern blocks 561, 562, 563, and 564, a third opening region OA3 is formed between the pattern blocks 561, 562, 563, and 564 and the auxiliary pattern blocks AP1, AP2, AP3, and AP4. In addition, a fourth opening region OA4 is disposed between the auxiliary pattern blocks AP1, AP2, AP3, and AP4. In this case, the folding stress of the pattern buffer layer 560 is further reduced, and the generation and propagation of cracks can be minimized.

[0111] The black matrix 580 is disposed between the plurality of pattern blocks 561, 562, 563, and 564 on the same plane as the pattern buffer layer 560. Therefore, the black matrix 580 contacts the upper surfaces and side surfaces of the auxiliary pattern blocks AP1, AP2, AP3, and AP4 that are arranged to surround the pattern blocks 561, 562, 563, and 564. In addition, the black matrix 580 covers the third opening region OA3 and the fourth opening region OA4. In the third opening region OA3 and the fourth opening region OA4, the black matrix 580 formed of a relatively flexible organic material is provided as compared with the pattern buffer layer 560 formed of an inorganic material. Therefore, the folding stress is significantly reduced, and the generation and propagation of cracks due to folding can be further effectively suppressed.

[0112] Exemplary embodiments of the present disclosure may also be described as follows:

[0113] According to an aspect of the present disclosure, an organic light emitting display device is provided. The organic light emitting display device includes: an organic light emitting display panel including a plurality of sub-pixels, a pattern buffer layer disposed on the organic light emitting display panel and patterned to overlap at least one of the plurality of sub-pixels, a color filter layer disposed on the pattern buffer layer and including a plurality of color filters corresponding to the plurality of sub-pixels, and a black matrix disposed on the same plane as the pattern buffer layer and partitioning each of the plurality of color filters.

[0114] The pattern buffer layer may include a plurality of independent pattern blocks, and each of the plurality of pattern blocks may be disposed to overlap the plurality of sub-pixels to have an island shape.

[0115] The pattern buffer layer may further include at least one connection block disposed between the plurality of pattern blocks to connect two adjacent pattern blocks.

[0116] The connection block may be patterned to have at least one opening area.

[0117] The plurality of sub-pixels may include a first sub-pixel and a second sub-pixel disposed along a first direction, and a third sub-pixel and a fourth sub-pixel spaced apart from the first sub-pixel and the second sub-pixel in a second direction and disposed along the first direction. The plurality of pattern blocks may include a first pattern block overlapping the first sub-pixel, a second pattern block overlapping the second sub-pixel, a third pattern block overlapping the third sub-pixel, and a fourth pattern block overlapping the fourth sub-pixel. The connection block may include a first connection block connecting the first pattern block and the second pattern block, and a second connection block connecting the third pattern block and the fourth pattern block.

[0118] The first pattern block, the second pattern block, and the first connection block may constitute a first block unit, and the third pattern block, the fourth pattern block, and the second connection block may constitute a second block unit. The first block unit and the second block unit may be disposed in a zigzag pattern in the second direction.

[0119] The pattern buffer layer may further include a first extension block connecting two adjacent first block units to each other, and a second extension block connecting two adjacent second block units to each other. The first block unit extends linearly along the first direction through the first extension block to form a first line pattern, and the second block unit extends linearly along the first direction through the second extension block to form a second line pattern. The second line pattern may be spaced apart from the first line pattern in the second direction.

[0120] The plurality of color filters may be disposed on the pattern buffer layer to correspond to the plurality of pattern blocks respectively, and the width of each of the plurality of pattern blocks may be greater than the width of each of the plurality of color filters.

[0121] The first block unit and the first extension block may have the same width such that the first line pattern extends with a constant width, and the second block unit and the second extension block may have the same width such that the second line pattern extends with a constant width.

[0122] The respective widths of the first line pattern and the second line pattern may be less than the width of the plurality of color filters.

[0123] The pattern buffer layer may further include auxiliary pattern blocks disposed between the plurality of pattern blocks.

[0124] The auxiliary pattern blocks may be arranged to surround at least one of the plurality of pattern blocks.

[0125] The black matrix may be arranged to be in direct contact with the top surface and the side surfaces of the auxiliary pattern blocks.

[0126] The organic light emitting display panel may include a display area in which a plurality of sub-pixels are disposed and a non-display area surrounding the display area. The organic light emitting display panel may further include an auxiliary pattern buffer layer disposed on the organic light emitting display panel along at least one edge of the non-display area.

[0127] The auxiliary pattern buffer layer may include a plurality of auxiliary pattern buffer members and may have an opening area between the plurality of auxiliary pattern buffer members.

[0128] Each of the plurality of auxiliary pattern buffer members may be arranged along the edge of the non-display area to have a frame shape.

[0129] According to another aspect of the present disclosure, there is provided an organic light emitting display device having a plurality of sub-pixels. The organic light emitting display device having a plurality of sub-pixels includes: a substrate, a thin film transistor disposed on the substrate, an organic light emitting element disposed on the thin film transistor, a packaging layer disposed on the organic light emitting element, and an anti-reflection layer disposed on the packaging layer. In addition, the anti-reflection layer may include: a pattern buffer layer patterned to overlap at least one of the plurality of sub-pixels and including at least one opening area, a color filter layer disposed on the pattern buffer layer, and a black matrix disposed in the opening area.

[0130] The organic light emitting display device may further include a touch layer disposed between the packaging layer and the anti-reflection layer.

[0131] The pattern buffer layer may include a plurality of pattern blocks arranged to be spaced apart from each other, and each of the plurality of pattern blocks is arranged to overlap each of the plurality of sub-pixels to have an island shape.

[0132] The pattern buffer layer may further include connection blocks disposed between the plurality of pattern blocks to connect two adjacent pattern blocks.

[0133] It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the technical idea or scope of the present disclosure. Accordingly, the present disclosure is intended to cover such modifications and variations of the present disclosure as long as they fall within the scope of the appended claims and their equivalents.

[0134] Cross - reference to related applications

[0135] This application claims priority to Korean Patent Application No. 10 - 2019 - 0177430, filed on December 30, 2019, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

Claims

1. An organic light-emitting display device, the organic light-emitting display device comprising: An organic light-emitting display panel, the organic light-emitting display panel including a plurality of sub-pixels, the organic light-emitting display panel including: A glass substrate; Thin-film transistors disposed on the glass substrate; A planarization layer disposed on the thin-film transistors; Organic light-emitting elements disposed on the planarization layer; A encapsulation layer disposed on the organic light-emitting elements and including at least one of an inorganic layer and an organic layer; A protective layer disposed on the encapsulation layer; and A color filter layer and a black matrix, the color filter layer and the black matrix being disposed on the protective layer; A pattern buffer layer disposed between the protective layer and the color filter layer, The pattern buffer layer being disposed between a part of the black matrix and other parts of the black matrix.

2. The organic light emitting display device according to claim 1, wherein The color filter layer includes a plurality of color filters corresponding to the plurality of sub-pixels; and the black matrix is disposed between the plurality of color filters, Wherein, the pattern buffer layer is formed of an inorganic material.

3. The organic light-emitting display device according to claim 1, the organic light-emitting display device further comprising: A bank disposed on the planarization layer and partitioning a pixel region composed of a plurality of sub-pixels.

4. The organic light-emitting display device according to claim 3, wherein, The black matrix is disposed corresponding to the bank.

5. The organic light emitting display device according to claim 1, wherein The pattern buffer layer includes a plurality of pattern blocks spaced apart from each other, and Each of the plurality of pattern blocks is disposed to overlap with the plurality of sub-pixels to have an island shape.

6. The organic light-emitting display device according to claim 5, wherein, At least one of the plurality of pattern blocks has a sub-pixel-like shape.

7. The organic light emitting display device according to claim 5, wherein At least one of the plurality of pattern blocks has a circular shape or an oval shape or a polygonal shape.

8. The organic light emitting display device according to claim 5, wherein The plurality of sub-pixels disposed on the pattern buffer layer respectively correspond to the plurality of pattern blocks, and Wherein, the width of one pattern block among the plurality of pattern blocks is different from the width of the light-emitting region of one sub-pixel among the plurality of sub-pixels.

9. The organic light-emitting display device according to claim 8, Among them, The width of the one pattern block among the plurality of pattern blocks is greater than the width of the light-emitting region of the one sub-pixel among the plurality of sub-pixels.

10. The organic light emitting display device according to claim 5, wherein, The pattern buffer layer further includes at least one connection block disposed between the plurality of pattern blocks to connect two adjacent pattern blocks.

11. The organic light emitting display device according to claim 5, wherein, The plurality of color filters disposed on the pattern buffer layer respectively correspond to the plurality of pattern blocks, and The width of one pattern block among the plurality of pattern blocks is different from the width of one color filter among the plurality of color filters.

12. The organic light emitting display device according to claim 11, wherein, The width of the one pattern block among the plurality of pattern blocks is greater than the width of the one color filter among the plurality of color filters.

13. The organic light emitting display device according to claim 1, wherein Omit a polarizing plate or a polarizing film from the organic light-emitting display panel.

14. The organic light emitting display device according to claim 1, wherein, The color filter layer is disposed to cover a partial region of the black matrix.

15. The organic light emitting display device according to claim 1, wherein The black matrix includes red pigment, blue pigment, and green pigment.

16. The organic light-emitting display device according to claim 1, wherein, The black matrix includes a black pigment selected from carbon-based pigments, metal-oxide-based pigments, and organic-based pigments.

17. The organic light emitting display device according to claim 1, wherein the organic light emitting display device further comprises: a touch layer disposed between the encapsulation layer and the protection layer.

18. The organic light emitting display device according to claim 17, wherein The touch layer includes a touch electrode and a touch insulating layer.

19. The organic light emitting display device according to claim 17, wherein the organic light emitting display device further comprises: a buffer layer disposed between the encapsulation layer and the touch layer.

20. The organic light emitting display device according to claim 10, wherein The plurality of sub-pixels include a first sub-pixel and a second sub-pixel arranged along a first direction, and a third sub-pixel and a fourth sub-pixel spaced apart from the first sub-pixel and the second sub-pixel in a second direction and arranged along the first direction, The plurality of pattern blocks include a first pattern block overlapping with the first sub-pixel, a second pattern block overlapping with the second sub-pixel, a third pattern block overlapping with the third sub-pixel, and a fourth pattern block overlapping with the fourth sub-pixel, and the connection block includes a first connection block connecting the first pattern block and the second pattern block and a second connection block connecting the third pattern block and the fourth pattern block.

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