Light-emitting display device

Abstract

A light emitting display device includes: a substrate including a display area and a non-display area; a plurality of pixels, the plurality of pixels being disposed in the display area; a lens processing pattern disposed in the non-display area and surrounding the display area; a light emitting element layer disposed in the display area; an encapsulation layer on the light emitting element layer in the display area; and a color filter layer and a lens layer on the encapsulation layer in the display area. The height of the upper surface of the lens processing pattern is the same as that of the upper surface of the lens layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2023-0156800, filed on November 13, 2023, which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to a light-emitting display device. Background Art

[0004] Recently, head mounted displays (HMDs) including organic light emitting diode displays have been developed. HMDs are wearable display devices for virtual reality (VR) or augmented reality (AR) that are worn in the form of glasses or helmets and are therefore focused at a distance close to the user's eyes. Such head mounted displays may be equipped with small organic light emitting diode displays having high resolution characteristics.

[0005] Specifically, in ultra-high-density resolution display devices with a pixel density of 4K (ppi: pixels per inch) or more, since the gap between pixels is very narrow, color mixing may occur between two adjacent pixels, resulting in deterioration of image quality. In addition, since the size of the pixel is very small, it is necessary to improve the structure to improve light efficiency, thereby providing brighter and clearer image quality with the same power consumption. Summary of the invention

[0006] In order to solve the above-mentioned problems, an object of the present disclosure is to provide a top emission type light emitting display device or a top emission type transparent light emitting display device having high brightness compared with power consumption.

[0007] One or more exemplary embodiments of the present disclosure may provide a top emission type light emitting display device or a top emission type transparent light emitting display device provided with a structure to prevent color mixing or light leakage between pixels constituting a light emitting diode.

[0008] One or more exemplary embodiments of the present disclosure may be directed to providing a top emission type light emitting display device or a top emission type transparent light emitting display device capable of low-power driving with higher brightness at the same power consumption by including a lens layer having a structure that can improve light efficiency.

[0009] One or more exemplary embodiments of the present disclosure may involve providing a top-emitting light-emitting display device or a top-emitting transparent light-emitting display device, which minimizes or at least reduces light loss by converging light provided by a light-emitting layer, and has a uniform brightness distribution by placing microlenses so as to have a flat portion in the center portion and a curved portion in the edge portion.

[0010] In order to achieve the above-mentioned purpose of the present disclosure, the light-emitting display device according to the present disclosure includes: a substrate, the substrate includes a display area and a non-display area; a plurality of pixels, the plurality of pixels are arranged in the display area; a lens processing pattern, the lens processing pattern is arranged in the non-display area, the lens processing pattern surrounds the display area; a light-emitting element layer, the light-emitting element layer is arranged in the display area, the light-emitting element layer is configured to emit light; an encapsulation layer, the encapsulation layer is located on the light-emitting element layer in the display area; and a color filter layer and a lens layer located on the encapsulation layer in the display area. The height of the upper surface of the lens processing pattern is the same as the height of the upper surface of the lens layer.

[0011] In an exemplary embodiment, the color filter layer is disposed on the encapsulation layer, and the lens layer is disposed on the color filter layer such that the color filter layer is located between the lens layer and the encapsulation layer.

[0012] In an exemplary embodiment, the lens layer is disposed on the encapsulation layer, and the color filter layer is disposed on the lens layer such that the lens layer is located between the color filter layer and the encapsulation layer.

[0013] In an exemplary embodiment, the lens layer includes a plurality of micro lenses, and each of the plurality of micro lenses overlaps with a corresponding one of the plurality of pixels.

[0014] In an exemplary embodiment, each of the plurality of microlenses includes: a flat upper surface overlapping a central region of a pixel; and a curved side surface extending from the flat upper surface, the curved side surface overlapping an edge region of the pixel.

[0015] In an exemplary embodiment, a height of a flat upper surface of each of the plurality of microlenses is the same as a height of an upper surface of the lens processing pattern.

[0016] In an exemplary embodiment, the light emitting element layer includes: a planarization layer covering a substrate; a plurality of anode electrodes on the planarization layer, each of the plurality of anode electrodes being located at a corresponding one of the plurality of pixels; a bank, the bank exposing a portion of each of the plurality of anode electrodes and covering a peripheral region of each of the plurality of anode electrodes; an emission layer, the emission layer being disposed on the plurality of anode electrodes and the bank; and a cathode electrode disposed on the emission layer. The lens layer includes: a plurality of microlenses, each microlens overlapping a corresponding pixel of the plurality of pixels; and a black matrix, the black matrix being disposed between a pair of adjacent microlenses of the plurality of microlenses, the black matrix overlapping the bank. Each of the plurality of microlenses includes: a flat upper surface, the flat upper surface covering a central region of a corresponding one of the plurality of anode electrodes; and a curved side surface, the curved side surface extending from the flat upper surface, the curved side surface overlapping the bank.

[0017] In an exemplary embodiment, the black matrix overlaps with curved side surfaces of a pair of adjacent micro lenses among the plurality of micro lenses.

[0018] In an exemplary embodiment, the color filter layer is disposed on the encapsulation layer, and the lens layer is disposed on the color filter layer such that the color filter layer is located between the lens layer and the encapsulation layer.

[0019] In an exemplary embodiment, the light emitting display device further includes a cover layer disposed on the lens layer, the cover layer including a transparent material having a refractive index smaller than a refractive index of the plurality of micro lenses.

[0020] In an exemplary embodiment, the black matrix extends through the entire thickness of the cover layer to the upper surface of the cover layer.

[0021] In an exemplary embodiment, the lens layer is disposed on the encapsulation layer, and the color filter layer is disposed on the lens layer such that the lens layer is located between the color filter layer and the encapsulation layer.

[0022] In an exemplary embodiment, the black matrix penetrates the entire thickness of the color filter layer and extends to the upper surface of the color filter layer.

[0023] In an exemplary embodiment, the light emitting display device further includes a cover layer disposed on the color filter layer, the cover layer including a transparent material having a refractive index smaller than a refractive index of the plurality of micro lenses.

[0024] In an exemplary embodiment, the black matrix extends through the entire thickness of the color filter layer and the entire width of the cover layer to the upper surface of the cover layer.

[0025] In an exemplary embodiment, the lens treatment pattern includes a closed curved shape surrounding the display area, the closed curved shape having a width.

[0026] In an exemplary embodiment, the lens treatment pattern includes a plurality of closed curved shapes each having a predetermined width, and the plurality of closed curved shapes are spaced apart from each other with a predetermined gap between a pair of the plurality of closed curved shapes.

[0027] In an exemplary embodiment, the lens treatment pattern includes a plurality of segments, each segment having a predetermined width and a predetermined length, and the plurality of segments are spaced apart from each other with a predetermined gap between a pair of segments among the plurality of segments.

[0028] In an exemplary embodiment, the light emitting display device further includes: a driving element layer located between the substrate and the light emitting element layer in the display region, the driving element layer being configured to drive the light emitting element layer.

[0029] The light-emitting display device according to the present disclosure may have a structure that ensures the convergence of positive front light by arranging a microlens layer, so that the light extraction efficiency can be enhanced or maximized. Even in an ultra-high density resolution display device with a very small emission area, higher brightness can be provided with the same power consumption. Therefore, low-power driving can be achieved.

[0030] According to the light-emitting display device of the present disclosure, a microlens may be provided, wherein the microlens has a flat surface in the center portion and a curved surface in the edge portion. In addition, a black matrix may be provided between the microlenses corresponding to the curved surface. Therefore, light may not be excessively concentrated in the center portion, and brightness may be evenly distributed in the pixel area. In addition, due to the presence of the black matrix, color mixing does not occur between adjacent pixels even in an ultra-high-resolution display device in which the interval between pixels is narrow.

[0031] The light-emitting display device according to the present disclosure may have a lens processing pattern in a non-display area. By matching the height of the upper surface of the lens processing pattern with the height of the flat surface of the microlens, a microlens with uniform height may be ensured by using a pressurization method of the lens processing pattern.

[0032] In addition to the effects of the present disclosure described above, other features and advantages of the present disclosure are described below or may be clearly understood by those skilled in the art through these descriptions and explanations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings provide a further understanding of the present disclosure and are incorporated in and constitute a part of the present application. The accompanying drawings illustrate several embodiments of the present disclosure and together with the description are used to explain the principles of the present disclosure. In the drawings:

[0034] Figure 1 is a plan view showing a schematic structure of a light emitting display device according to an embodiment of the present disclosure.

[0035] Figure 2 is a circuit diagram showing a structure of one pixel provided in a light emitting display device according to an embodiment of the present disclosure.

[0036] Figure 3 is an enlarged plan view showing a structure of three pixels sequentially arranged in a light emitting display device according to an embodiment of the present disclosure.

[0037] Figure 4 It is along Figure 3 1 is a cross-sectional view taken along line II′ in FIG. 1 , which is used to illustrate the structure of a pixel in the light-emitting display device according to an embodiment of the present disclosure.

[0038] Figure 5 It is along Figure 3 1 is a cross-sectional view taken along line II-II′ in FIG. 1 , which is used to illustrate the structure of three pixels sequentially arranged in the light-emitting display device according to the first embodiment of the present disclosure.

[0039] Figure 6 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light-emitting display device according to a second embodiment of the present disclosure.

[0040] Figure 7 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light emitting display device according to a third embodiment of the present disclosure.

[0041] Figure 8 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light emitting display device according to a fourth embodiment of the present disclosure.

[0042] Fig. 9 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light-emitting display device according to a fifth embodiment of the present disclosure.

[0043] Fig.10 It is along Figure 1 1 is an enlarged cross-sectional view taken along line III-III' of FIG. 1 , for illustrating a portion where a lens processing pattern is formed in a light emitting display device according to one or more embodiments of the present disclosure.

[0044] Fig.11 Yes Figure 1 An enlarged cross-sectional view in which a portion “A” of FIG. 1 is enlarged to illustrate an exemplary embodiment of a lens processing pattern in one or more embodiments of the present disclosure.

[0045] Fig.12 Yes Figure 1 FIG. 2 is an enlarged cross-sectional view in which a portion “A” of FIG. 1 is enlarged to illustrate another exemplary embodiment of a lens processing pattern in one or more embodiments of the present disclosure.

[0046] Fig.13 Yes Figure 1 FIG. 2 is an enlarged cross-sectional view in which a portion “A” of FIG. 1 is enlarged to illustrate another exemplary embodiment of a lens processing pattern in one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0047] The advantages and features of the present disclosure and its implementation methods are explained below by describing the following embodiments with reference to the accompanying drawings. However, the present disclosure can be implemented in different ways and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these exemplary embodiments are provided so that the present disclosure can be sufficiently comprehensive and complete to help those skilled in the art fully understand the scope of the present disclosure. In addition, the protection scope of the present disclosure is limited by the claims and their equivalents.

[0048] The shapes, sizes, ratios, angles, quantities, etc. shown in the drawings for describing various exemplary embodiments of the present disclosure are given only as examples. Therefore, the present disclosure is not limited to the details shown. Unless otherwise specified, the same reference numerals represent the same elements throughout the specification. In the following description, in the case where a detailed description of a related known function or configuration may unnecessarily obscure the main points of the present disclosure, a detailed description of such a known function or configuration may be omitted.

[0049] Reference will now be made in detail to exemplary embodiments of the present disclosure, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals are used throughout the drawings to refer to the same or similar parts. In the specification, it should be noted that the same reference numerals that have been used to represent the same elements in other drawings are used to represent these elements wherever possible. In the following description, when functions and configurations known to those skilled in the art are not related to the basic configuration of the present disclosure, their detailed description will be omitted. The terms described in the specification should be understood as follows.

[0050] In the present specification, when the terms "comprising", "having", "including", etc. are used, one or more other elements may be added unless a term such as "only" is used. Unless the context clearly indicates otherwise, an element described in the singular is intended to include plural elements and vice versa.

[0051] When interpreting an element, even if an explicit description of the error or tolerance range is not provided, the element is interpreted as including the error or tolerance range.

[0052] In the description of various embodiments of the present disclosure, in the case of describing a positional relationship, for example, in the case of using "on", "above", "below", "above", "below", "on the side", "immediately adjacent to", etc. to describe the positional relationship between two parts, one or more other parts may be located between the two parts, unless more restrictive terms such as "immediately", "directly" or "close to" are used. For example, in the case where an element or layer is disposed "on" another element or layer, a third layer or element may be inserted between the two. In addition, if a first element is described as being located "on" a second element, it does not necessarily mean that the first element is located above the second element in the figure. The upper and lower parts of the objects involved may change depending on the orientation of the objects. Therefore, in the case where a first element is described as being located "on" a second element, the first element may be located "above" the second element or "below" the second element in the figure or in the actual configuration, depending on the orientation of the object.

[0053] In describing a temporal relationship, when the temporal order is described as, for example, "after", "subsequently", "next", or "before", discontinuous cases may be included unless more restrictive terms such as "just", "immediately", or "directly" are used.

[0054] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms because they are not used to define a specific order. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0055] When describing various elements in the present disclosure, terms such as first, second, A, B, (a) and (b) can be used. These terms are only used to distinguish an element from another element, rather than to define the specific properties, order, sequence or quantity of an element. In the case where an element is described as "linked", "coupled" or "connected" to another element, unless otherwise stated, the element may be directly or indirectly connected to the other element. It should be understood that one or more other elements may also be "inserted" between two elements described as "linked", "connected" or "coupled" to each other.

[0056] It should be understood that the term "at least one" should be understood to include any and all combinations of one or more of the related listed items. For example, the meaning of "at least one of a first element, a second element, and a third element" covers the combination of all three listed elements, the combination of any two of the three elements, and each individual element, the first element, the second element, and the third element.

[0057] It will be fully understood by those skilled in the art that the features of the various embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may interoperate and technically drive each other differently. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0058] Hereinafter, examples of a display device according to the present disclosure will be described in detail with reference to the accompanying drawings. Whenever possible, the same reference numerals are used throughout the drawings to refer to the same or like parts.

[0059] Hereinafter, the present disclosure will be explained with reference to the accompanying drawings. For the convenience of description, the scale of each element shown in the accompanying drawings may be different from the actual scale, and thus the present disclosure is not limited to the scale shown in the accompanying drawings.

[0060] Figure 1 1 is a plan view showing a schematic structure of a light emitting display device according to an embodiment of the present disclosure. Figure 1 In the figure, the X-axis refers to the direction parallel to the scan line, the Y-axis refers to the direction of the data line, and the Z-axis refers to the height direction of the display device.

[0061] Reference Figure 1 , the electroluminescent display includes a substrate 110 , a gate (or scan) driver 200 , a pad portion 300 , a source driver IC (Integrated Circuit) 410 , a flexible circuit film 430 , a circuit board 450 , and a timing controller 500 .

[0062] The substrate 110 may include an electrically insulating material or a flexible material. The substrate 110 may be made of glass, metal, or plastic, but is not limited thereto. When the light-emitting display device is a flexible display, the substrate 110 may be made of a flexible material such as plastic. For example, the substrate 110 may include a transparent polyimide material.

[0063] The substrate 110 may include a display area AA and a non-display area NDA. The display area AA, which is an area for presenting a video image, may be defined as a majority of the middle area of ​​the substrate 110, but is not limited thereto. In the display area AA, a plurality of pixels P are arranged in a matrix. In addition, a plurality of scan lines (or gate lines) and a plurality of data lines may be arranged to cross each other. Each pixel P may be arranged at the intersection of a scan line extending along the X-axis and a data line extending along the Y-axis.

[0064] Here, the pixel P can present any color of red, green and blue, or red, green, blue or white. Red pixels, green pixels and blue pixels can be gathered, or red pixels, green pixels, blue pixels and white pixels can be gathered to form a unit pixel. For example, each pixel presenting each color can be referred to as a "sub-pixel", and it can be understood that these "sub-pixels" form a "pixel". As another example, it can be understood that the pixel P presenting each color is called a "pixel", and three or four of these "pixels" are gathered to form a "unit pixel". Hereinafter, the latter case will be described.

[0065] The non-display area NDA, which is an area where a video image is not presented, may be defined as a peripheral area of ​​the substrate 110 surrounding all or part of the display area AA. In the non-display area NDA, the gate driver 200 and the pad portion 300 may be formed or disposed. In addition, the lens processing pattern 1000 may be disposed in the non-display area NDA.

[0066] The gate driver 200 may provide a scan (or gate) signal to the scan line SL according to a gate control signal received from the timing controller 500 through the pad portion 300. A GIP (gate driver in panel) type gate driver 200 may be formed at any non-display area NDA outside the display area DA on the substrate 110. The GIP type means that the gate driver 200 is directly formed on the substrate 110. For example, the gate driver 200 may be configured with a shift register. In the GIP type, transistors of the shift register of the gate driver 200 are directly formed on the upper surface of the substrate 110.

[0067] The pad portion 300 may be disposed in the non-display area NDA at one side edge of the display area AA of the substrate 110. The pad portion 300 may include a data pad connected to each data line DL, a driving current pad connected to a driving current line, a high potential pad receiving a high potential voltage, and a low potential pad receiving a low potential voltage.

[0068] The lens processing pattern 1000 may be disposed at the outermost area of ​​the non-display area NDA. For example, in a plan view of the display device, the lens processing pattern 1000 may have a rectangular ring shape surrounding the display area AA and the gate driver 200 except for the pad portion 300. However, the embodiments of the present disclosure are not limited thereto, and the lens processing pattern 1000 may be disposed between the display area AA and the gate driver 200. Alternatively, the lens processing pattern 1000 may also be disposed to overlap with the gate driver 200.

[0069] The source driver IC 410 may receive digital video data and a source control signal from the timing controller 500. The source driver IC 410 may convert the digital video data into an analog data voltage according to the source control signal and then provide it to the data line. When the source driver IC 410 is manufactured in a chip type, it may be mounted on the flexible circuit film 430 as a COF (chip on film) or COP (chip on plastic) type.

[0070] The flexible circuit film 430 may include a plurality of first connection lines connecting the pad portion 300 to the source driver IC 410, and a plurality of second connection lines connecting the pad portion 300 to the circuit board 450. The flexible circuit film 430 may be attached to the pad portion 300 using an anisotropic conductive film so that the pad portion 300 may be connected to the first connection lines of the flexible circuit film 430.

[0071] The circuit board 450 may be attached to the flexible circuit film 430. The circuit board 450 may include a plurality of circuits implementing a driving chip. For example, the circuit board 450 may be a printed circuit board or a flexible printed circuit board.

[0072] The timing controller 500 may receive digital video data and a timing signal from an external system board through a cable of the circuit board 450. The timing controller 500 may generate a gate control signal for controlling the operation timing of the gate driver 200 and a source control signal for controlling the source driver IC 410 based on the timing signal. The timing controller 500 may provide the gate control signal to the gate driver 200 and provide the source control signal to the source driver IC 410. Depending on the product type, the timing controller 500 may be integrated into one driver chip with the source driver IC 410 and may be mounted on the substrate 110 to be connected to the pad unit 300.

[0073] In the following, reference will be made to Figures 2 to 4 , describing the detailed structure of the light-emitting display device according to an embodiment of the present disclosure. Figure 2 is a circuit diagram showing a structure of one pixel provided in a light emitting display device according to an embodiment of the present disclosure. Figure 3 is an enlarged plan view showing a structure of three pixels sequentially arranged in a light emitting display device according to an embodiment of the present disclosure.

[0074] refer to Figures 2 to 3 , each pixel P of the light-emitting display according to the present disclosure may be defined by a scan line SL, a data line DL, and a driving current line VDD. Each pixel P of the light-emitting display may include a switching thin film transistor ST, a driving thin film transistor DT, a light-emitting diode OLE, and a storage capacitor (or capacitor) Cst. The driving current line VDD may be provided with a high-level voltage for driving the light-emitting diode OLE.

[0075] A switching thin film transistor ST and a driving thin film transistor DT may be formed on the substrate 110. For example, the switching thin film transistor ST may be configured to be connected to the scan line SL and to intersect with the data line DL. The switching thin film transistor ST may include a gate electrode SG, a semiconductor layer SA, a source electrode SS, and a drain electrode SD. The gate electrode SG may be a part of the scan line SL. The semiconductor layer SA may be arranged to intersect with the gate electrode SG. The overlapping portion of the semiconductor layer SA and the gate electrode SG may be defined as a channel region. The source electrode SS may be branched from or connected to the data line DL, and the drain electrode SD may be connected to the driving thin film transistor DT. The source electrode SS may be on one side of the channel region of the semiconductor layer SA, and the drain electrode SD may be on the other side of the semiconductor layer SA. By providing a data signal to the driving thin film transistor DT, the switching thin film transistor ST may be used to select the pixel P to be driven.

[0076] The driving thin film transistor DT can be used to drive the light emitting diode OLE of the selected pixel P through the switching thin film transistor ST. The driving thin film transistor DT may include a gate electrode DG, a semiconductor layer DA, a source electrode DS, and a drain electrode DD. The gate electrode DG of the driving thin film transistor DT may be connected to the drain electrode SD of the switching thin film transistor ST. For example, the gate electrode DG of the driving thin film transistor DT may extend from the drain electrode SD of the switching thin film transistor ST. In the driving thin film transistor DT, the drain electrode DD may be branched from the driving current line VDD or connected to the driving current line VDD. In addition, the source electrode DS may be connected to the anode electrode (or pixel electrode) ANO of the light emitting diode (or light emitting element) OLE. The semiconductor layer DA may be arranged to intersect with the gate electrode DG. In the semiconductor layer DA, the portion overlapping with the gate electrode DG may be defined as a channel region. The source electrode DS may be connected to one side of the semiconductor layer DA around the channel region, and the drain electrode DD may be connected to the other side of the semiconductor layer DA. The storage capacitor (or capacitor) Cst may be arranged between the gate electrode DG of the driving thin film transistor DT and the anode electrode ANO of the light emitting diode OLE.

[0077] The light emitting diode OLE may emit light according to the current controlled by the driving thin film transistor DT. The driving thin film transistor DT may control the amount of current flowing from the driving current line VDD to the light emitting diode OLE according to the voltage difference between the gate electrode DG and the source electrode DS.

[0078] The light emitting diode OLE may include an anode electrode ANO, an emission layer EL, and a cathode electrode CAT. The light emitting diode OLE may emit light according to a current controlled by the driving thin film transistor DT. In other words, the light emitting diode OLE may provide an image by emitting light according to a current controlled by the driving thin film transistor DT. The anode electrode ANO of the light emitting diode OLE may be connected to a source electrode DS of the driving thin film transistor DT. The cathode electrode CAT (or common electrode) may be a low power line VSS to which a low potential voltage is provided. Therefore, the light emitting diode OLE may be driven by a current flowing from the driving current line VDD to the low power line VSS controlled by the driving thin film transistor DT.

[0079] A plurality of pixels P may be arranged on the substrate 110. For example, along the horizontal direction, a red pixel RP, a green pixel GP, and a blue pixel BP may be arranged and disposed in sequence. A combination of a red pixel RP, a green pixel GP, and a blue pixel BP may constitute a pixel. In another case, a red pixel, a green pixel, a white pixel, and a blue pixel may be arranged in sequence along the horizontal direction. A red pixel, a green pixel, a white pixel, and a blue pixel may form a unit pixel. Figure 3 It is shown that three pixels P including a red pixel RP, a green pixel GP and a blue pixel BP are sequentially arranged in the horizontal direction.

[0080] refer to Figure 4 , a cross-sectional structure of a light-emitting display device according to an embodiment of the present disclosure will be described. Figure 4 It is along Figure 3 , for illustrating the structure of a pixel in a light-emitting display device according to an embodiment of the present disclosure. The light-emitting display device may include a substrate 110, a driving element layer 220, a light-emitting element layer 330, an encapsulation layer 440, a color filter layer CF, and a lens layer 660. The driving element layer 220 may include a plurality of thin layers formed on the substrate 110. The driving element layer 220 may include a switching thin film transistor ST and a driving thin film transistor DT.

[0081] On the substrate 110, a data line DL, a driving current line VDD, and a light shielding layer LS may be formed. The light shielding layer LS may be arranged in an island shape, spaced apart from the data line DL and the driving current line VDD by a predetermined distance and overlapped with the semiconductor layers SA and DA. In some cases, the light shielding layer LS may be omitted.

[0082] The buffer layer BUF is deposited on the entire surface of the substrate 110, covering the data line DL and the driving current line VDD. On the buffer layer BUF, a semiconductor layer SA of the switching thin film transistor ST and a semiconductor layer DA of the driving thin film transistor DT are formed. The switching thin film transistor ST and the driving thin film transistor DT are formed on the buffer layer BUF. Preferably, the channel regions in the semiconductor layers SA and DA overlap with the light shielding layer LS.

[0083] The gate insulating layer GI is deposited on the substrate 110, covering the semiconductor layers SA and DA. A gate electrode SG overlapping the semiconductor layer SA of the switching thin film transistor ST and a gate electrode DG overlapping the semiconductor layer DA of the driving thin film transistor DT are formed on the gate insulating layer GI. In addition, on both sides of the gate electrode SG of the switching thin film transistor ST, a source electrode SS in contact with one side of the semiconductor layer SA and spaced apart from the gate electrode SG, and a drain electrode SD in contact with the other side of the semiconductor layer SA are formed. In addition, on both sides of the gate electrode DG of the driving thin film transistor DT, a source electrode DS in contact with one side of the semiconductor layer DA and spaced apart from the gate electrode DG, and a drain electrode DD in contact with the other side of the semiconductor layer DA and spaced apart from the gate electrode DG are formed.

[0084] The gate electrodes SG and DG and the source-drain electrodes SS-SD and DS-DD are formed on the same layer, but are spatially and electrically separated from each other. The source electrode SS of the switching thin film transistor ST can be connected to the data line DL via a contact hole penetrating the gate insulating layer GI. In addition, the drain electrode DD of the driving thin film transistor DT can be connected to the driving current line VDD via another contact hole penetrating the gate insulating layer GI.

[0085] A passivation layer PAS is deposited on the substrate 110, covering the thin film transistors ST and DT. The passivation layer PAS may be made of an inorganic material such as silicon oxide or silicon nitride.

[0086] The light emitting element layer 330 is formed on the driving element layer 220. The light emitting element layer 330 may include a planarization layer PL and a light emitting diode OLE. The planarization layer PL may be a layer that covers the substrate and is used to planarize the uneven surface of the substrate 110 on which the thin film transistors ST and DT are formed. In order to equalize or compensate for the height difference caused by the uneven surface condition, the planarization layer PL may be formed with an organic material. A pixel contact hole PH may be formed at the passivation layer PAS and the planarization layer PL to expose a portion of the source electrode DS of the driving thin film transistor DT.

[0087] An anode electrode (or pixel electrode) ANO may be formed on the top surface of the planarization layer PL. The anode electrode ANO may be connected to the source electrode DS of the driving thin film transistor DT via the pixel contact hole PH. Depending on the emission type of the light emitting diode OLE, the anode electrode ANO may have different structures and configuration elements. For example, in the case of a bottom emission type that provides light in a downward direction toward the substrate 110, it may be formed of a transparent conductive material. In another example, in the case of a top emission type that provides light in an upward direction relative to the substrate 110, it may be formed of a metal material having excellent light reflectivity. Alternatively, in the case of a top emission type that provides light in an upward direction relative to the substrate 110, a reflective layer formed of a metal material having excellent light reflectivity may be further included below or above the transparent layer formed by the transparent conductive material.

[0088] A bank BA is formed on the top surface of the substrate 110 having the anode electrode ANO. In one embodiment, the bank BA is an insulating layer made of an inorganic material or an organic material. Hereinafter, the case where it is made of an organic material will be described. The bank BA covers the peripheral area of ​​the anode electrode ANO and exposes most of the middle area. The middle area exposed from the bank BA is defined as the emission area EA, and the area covered by the bank BA is defined as the non-emission area NEA.

[0089] An emission layer EL is disposed on the anode electrode ANO and the bank BA. The emission layer EL may be deposited on the entire display area AA of the substrate 110, covering the anode electrode ANO and the bank BA. For example, the emission layer EL may include at least two emission portions for generating white light. Specifically, the emission layer EL may include a first emission portion and a second emission portion stacked vertically, for generating white light by mixing a first light from the first emission portion and a second light from the second emission portion.

[0090] In another example, the emission layer EL may include any one of a blue emission portion, a green emission portion, and a red emission portion for generating light corresponding to a color set in each pixel. In addition, the light emitting diode OLE may include a functional layer for improving the luminous efficiency and / or life of the emission layer EL.

[0091] The cathode electrode (or common electrode) CAT is deposited on the entire surface of the substrate 110 on which the emission layer is formed. The cathode electrode CAT is deposited to contact the surface of the emission layer EL. The cathode electrode CAT is formed on the entire substrate 110 to be commonly connected to the emission layer EL deposited in all pixels. In the case of a top emission type, the cathode electrode CAT may include a transparent conductive material. For example, the cathode electrode CAT may be made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). Alternatively, the cathode electrode CAT may include a thin metal such as aluminum (Al), magnesium (Mg), calcium (Ca), silver (Ag), or an alloy or combination thereof (for example, an aluminum-magnesium alloy (AlMg)). It may be formed into a to In the case of a bottom emission type, the cathode electrode CAT may be formed with a thickness of The metal material with excellent light reflectivity can include any one of aluminum (Al), magnesium (Mg), calcium (Ca), silver (Ag) or alloys or combinations thereof (for example, aluminum-magnesium alloy (AlMg)).

[0092] The encapsulation layer 440 is stacked on the light emitting element layer 330. The encapsulation layer 440 may have a single-layer structure made of an inorganic material, or a multi-layer structure in which several inorganic layers are sequentially stacked. As another example, the encapsulation layer 440 may have a structure in which an inorganic layer, an organic layer, and an inorganic layer are sequentially stacked. Here, for ease of description, the encapsulation layer 440 made of a single inorganic layer will be used for illustration.

[0093] The color filter layer 550 is stacked on the encapsulation layer 440. The color filter layer 550 may include a plurality of color filters CF arranged in a matrix manner to correspond to the arrangement of the pixels P. The color filter CF may be provided in a structure in which one of a red color filter, a green color filter, and a blue color filter is assigned to each pixel P. As another example, the color filter CF may be provided in a structure in which one of a red color filter, a white color filter, a green color filter, and a blue color filter is assigned to each pixel P. Hereinafter, for ease of description, the case in which the color filter CF includes a red color filter R, a green color filter G, and a blue color filter B is used for explanation.

[0094] The lens layer 660 may be disposed on the color filter layer 550. The lens layer 660 may include a plurality of microlenses LN. Each microlens LN may be formed to correspond to each pixel P. For example, one microlens LN may be formed in the shape of a hemispherical (or semicircular) convex lens on the red color filter R so that the microlens LN overlaps the red color filter R. A black matrix BM may be disposed between a pair of adjacent microlenses LN. The black matrix BM may be disposed at a position corresponding to the bank BA of the light emitting element layer 330. That is, the black matrix BM overlaps the bank BA. For example, the black matrix BM may have a size equal to or slightly smaller than the bank BA, and may be arranged to correspond to the center of the bank BA.

[0095] In the case where the microlens LN has a hemispherical or hemispherical shape, such as Figure 4 As shown by the arrows in FIG. 1 , due to the light-collecting function of the microlens LN, the light provided from the emission layer EL can be guided (i.e., converged) to the center of the emission area EA of the pixel P. Specifically, the light that may be lost by entering the black matrix BM can be refracted from the curved surface of the microlens LN to the central portion, thereby reducing the light loss.

[0096] As a result, the brightness of the central portion of the pixel P can be increased. However, when it is excessively concentrated in the central portion, the brightness distribution in the entire emission area EA of the pixel P may be uneven. In this case, the brightness directly in front may be very high, but the brightness in the wide viewing angle direction may be reduced, which may cause problems such as overall image quality degradation or uneven brightness.

[0097] Hereinafter, a structure for preventing light emitted from the emission layer EL from being excessively concentrated in the center portion by the microlens LN will be described through various embodiments of the present disclosure. According to the following embodiments, the present disclosure can provide a light-emitting display device having a structure that can uniformly improve front brightness and wide viewing angle brightness while minimizing the loss of light emitted from pixels.

[0098] <First Embodiment>

[0099] refer to Figure 5 , the first embodiment of the present disclosure will be described. Figure 5 It is along Figure 3 1 is a cross-sectional view taken along line II-II′ in FIG. 1 , which is used to illustrate the structure of three pixels sequentially arranged in the light-emitting display device according to the first embodiment of the present disclosure.

[0100] The light emitting display device according to the first embodiment of the present disclosure may include a substrate 110 , a driving element layer 220 , a light emitting element layer 330 , an encapsulation layer 440 , a color filter layer 550 , and a lens layer 660 . Figure 5 The components below the encapsulation layer 440 can be connected with Figure 4The elements described in are the same as those described in , so the detailed description may be omitted.

[0101] Reference Figure 5 , the color filter layer 550 may be arranged on the encapsulation layer 440. The color filter layer 550 may include a plurality of color filters CF. For example, the color filter layer 550 may include a red color filter R, a green color filter G, and a blue color filter B. The red color filter R may be disposed at the red pixel RP, the green color filter G may be disposed at the green pixel GP, and the blue color filter B may be disposed at the blue pixel BP.

[0102] The lens layer 660 may be disposed on the color filter layer 550. The lens layer 660 may include a plurality of microlenses LN and a black matrix BM between adjacent microlenses LN. One microlens LN may be arranged to correspond to one pixel P one by one. The microlens LN may be configured to have a flat surface (or a flat portion, or a flat upper surface) 661 at a central region, and a curved surface (or a curved portion, or a curved side surface) 663 at an edge region surrounding the flat surface. The flat surface 661 may be arranged to correspond to (e.g., overlap) the anode electrode ANO. The flat surface 661 may have a size slightly larger or smaller than the anode electrode ANO. In some cases, the flat surface 661 may have the same size as the anode electrode ANO.

[0103] The curved surface 663 is Figure 4 The curved surface 663 may correspond to the edge area of ​​the hemispherical microlens LN shown, and may be arranged to correspond to the embankment BA. In one microlens LN, the curved surface 663 may correspond to half the size of the embankment BA. At the area where two adjacent microlenses LN meet, the curved surface 663 of each of the two microlenses LN may be arranged to correspond to the embankment BA.

[0104] At the area where a pair of adjacent microlenses LN meet, the two curved surfaces 663 may be configured to have a wedge shape or a valley shape, such as a "V" shape located between a pair of adjacent microlenses LN. The black matrix BM may be set to a wedge shape (or a valley shape). The black matrix BM may be arranged to correspond to the embankment BA. The size of the black matrix BM may be slightly larger or slightly smaller than the size of the embankment BA. In one embodiment, the black matrix BM may have a size slightly smaller than the embankment BA and be arranged to overlap with the inside of the embankment BA. The black matrix BM can prevent or reduce color mixing between two adjacent pixels P. For example, the black matrix BM disposed between the red pixel PR and the green pixel PG can prevent or reduce the light generated from the red pixel PR from entering the green pixel PG, or prevent the light generated from the green pixel PG from entering the red pixel PR.

[0105] The light-emitting display device according to the first embodiment may have a structure in which a plurality of microlenses LN may be arranged in one-to-one correspondence with the pixels P. Therefore, the light provided from the emission layer EL of each pixel P may be converged by the microlens LN to the central area of ​​the pixel P, thereby improving the light-emitting efficiency. In addition, the microlens LN of the light-emitting display device according to the first embodiment may include a flat surface 661 in the central area. In the flat surface 661, the light provided by the emission layer EL may not be excessively converged in the central area, and may be emitted while maintaining the viewing angle provided by the emission layer. A curved surface 663 may be provided at the edge of the flat surface 661 to surround the flat surface 661. The curved surface 663 may allow the light provided from the emission layer EL to converge in the central area without being absorbed and lost by the black matrix BM provided at the edge area of ​​the pixel P.

[0106] Therefore, the loss of light emitted by each pixel P can be minimized or at least reduced. In addition, the light-emitting display device according to the first embodiment can provide uniform brightness within a wide viewing angle range. As a result, a display device can be provided that restores lost light to the central area, provides high brightness with low power consumption, and has uniform brightness distribution over the entire area of ​​the display device substrate.

[0107] <Second Embodiment>

[0108] In the following, reference will be made to Figure 6 , describing the structure of a light-emitting display device according to a second embodiment of the present disclosure. Figure 6 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light-emitting display device according to a second embodiment of the present disclosure.

[0109] like Figure 6 The light emitting display device according to the second embodiment of the present disclosure shown may have a structure very similar to that of the first embodiment. The difference is that in the second embodiment, the top layer TL is disposed on the upper surface of the lens layer 660. The same elements as the first embodiment may not be repeatedly described.

[0110] The roof layer TL may be disposed on the entire surface of the substrate 110 on the lens layer 660 including the microlenses LN and the black matrix BM. The roof layer TL may be an element for protecting the lens layer 660. In addition, in one embodiment, the roof layer TL may be made of a transparent material having a different refractive index from the microlenses LN.

[0111] Specifically, the top layer TL may be made of a transparent resin material having a refractive index lower than (e.g., smaller than) that of the microlens LN. When the top layer TL is in contact with the microlens LN, due to the difference in refractive index at the interface between the lens layer 660 and the top layer TL, light emitted from the emission layer EL and passing through the interface may be diffused in the viewing angle direction, thereby ensuring a wide viewing angle. That is, at the interface between the top layer TL and the lens layer 660, light converged by the microlens LN may be diffused, thereby providing uniformly distributed brightness over the entire area of ​​the display device while providing a wide viewing angle.

[0112] Due to the presence of the microlens LN, the light-emitting display device according to the second embodiment can provide high brightness with lower power consumption by minimizing or at least reducing the loss of light emitted from the emission layer EL and converging the light in the direction of the central area. In addition, due to the presence of the flat surface 661 of the microlens LN and the top layer TL disposed on the microlens LN, the converged light entering the central area can be transferred to a wide viewing angle, so that a wide viewing angle can be ensured and the brightness can be uniformly distributed.

[0113] <Third Embodiment>

[0114] In the following, reference will be made to Figure 7 , describing the structure of a light-emitting display device according to a third embodiment of the present disclosure. Figure 7 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light emitting display device according to a third embodiment of the present disclosure.

[0115] Figure 7 The light-emitting display device according to the third embodiment of the present disclosure shown may have a structure very similar to that of the second embodiment. One of the features of the third embodiment is that the black matrix BM may penetrate the entire thickness of the top layer TL and extend to the upper surface of the top layer TL. Therefore, the upper surface of the black matrix BM is flat (e.g., aligned) with the upper surface of the top layer TL. The same elements as the second embodiment may not be repeatedly described.

[0116] The top layer TL may be disposed on the entire surface of the substrate 110 on the lens layer 660 including the microlenses LN. In one embodiment, the top layer TL may be made of a transparent material having a refractive index different from that of the microlenses LN. Specifically, the top layer TL may be made of a transparent resin material having a refractive index lower than that of the microlenses LN. As a result, light converged by the microlenses LN may be diffused by the top layer TL, so that brightness may be uniformly distributed over the entire area of ​​the display device, and a wide viewing angle may be provided.

[0117] A black matrix BM may be disposed between a pair of adjacent microlenses LN. The black matrix BM may have a structure that vertically extends from the microlens LN to the upper surface of the top layer TL after penetrating the top layer TL. With this structure, light diffused at the interface between the microlens LN and the top layer TL may be prevented from mixing at the boundary region between adjacent pixels P. That is, uniform brightness distribution may be ensured, and color mixing may be prevented to obtain a clear color gamut.

[0118] In order to form a Figure 3 For the black matrix BM of the structure shown, after forming the lens layer 660 including the black matrix BM and the microlens LN, the top layer TL may be deposited, and then the portion corresponding to the black matrix BM may be removed, and the black resin material may be additionally filled into the removed region. For another method, the microlens LN is first formed, the top layer TL is deposited on the microlens LN, the portion corresponding to the black matrix BM in the top layer TL is removed, and the black resin material is filled into the removed portion of the top layer TL.

[0119] According to the light-emitting display device of the third embodiment, by adapting the microlens LN, it is possible to provide high brightness with low power consumption by minimizing or at least reducing the loss of light from the emission layer EL and converging the light to the central area. In addition, by applying a flat surface in the central area of ​​the microlens LN and the top layer TL on the microlens LN, the light may not be excessively concentrated in the central area and may be diffused in the viewing angle direction, thereby providing a wide viewing angle and uniformly distributed brightness. In addition, the black matrix BM may prevent or at least reduce the mixing of light passing through the lens layer 660 at the boundary between the red pixel RP and the green pixel GP and the boundary between the green pixel GP and the blue pixel BP, thereby providing a clearer image quality.

[0120] <Fourth Embodiment>

[0121] In the following, reference will be made to Figure 8 , describing the structure of a light-emitting display device according to a fourth embodiment of the present disclosure. Figure 8 It is along Figure 3 The enlarged cross-sectional view taken along the line II-II' is used to illustrate the structure of three pixels sequentially arranged in the light-emitting display device according to the fourth embodiment of the present disclosure. Figure 8 In the embodiment, the components below the packaging layer 440 are Figure 4 What is described is the same, so the same explanation may not be repeated or simply described.

[0122] Reference Figure 8, the lens layer 660 may be arranged on the encapsulation layer 440. The lens layer 660 may include a plurality of microlenses LN and a black matrix BM surrounding each microlens LN and connected in a grid shape. Each microlens LN may be arranged to correspond to each pixel P one by one. Each microlens may include a flat surface 661 located at a central area and a curved surface 663 located at an edge area surrounding the flat surface 661. The flat surface 661 may have a size slightly larger than or slightly smaller than the anode electrode ANO. In some cases, the flat surface 661 may have the same size as the anode electrode ANO.

[0123] The curved surface 663 may be a region corresponding to the bank BA. At a region where two adjacent microlenses LN meet or abut, two curved surfaces 663 of two adjacent microlenses LS may be disposed to correspond to the bank BA.

[0124] The two curved surfaces 663 of a pair of adjacent microlenses LN may have a wedge shape or a valley shape, such as a "V" shape. The black matrix BM may be arranged to correspond to the "V" shaped area. The black matrix BM may have the same size as the embankment BA. Alternatively, the black matrix BM may also have a size slightly smaller than the embankment BA and be arranged to overlap with the inside of the embankment BA. The black matrix BM may prevent color mixing between two adjacent pixels P (i.e., between the red pixel RP and the green pixel GP and between the green pixel GP and the blue pixel BP).

[0125] The color filter layer 550 may be disposed on the upper surface of the lens layer 660. The color filter layer 550 may include a plurality of color filters CF. For example, the color filter layer 550 may include a red color filter R, a green color filter G, and a blue color filter B.

[0126] Even though not shown in the drawings, a cover layer made of a transparent resin material may be further provided on the color filter layer 550. The cover layer may preferably have a refractive index lower than that of the microlenses LN and / or the color filters CF of the color filter layer 550.

[0127] The light-emitting display device according to the fourth embodiment may have a structure in which the microlenses LN may be arranged in a one-to-one correspondence with the pixels P. Therefore, the light provided from the emission layer EL of each pixel P can be converged by the microlens LN to the central area of ​​the pixel P, thereby improving the luminous efficiency. In addition, the microlens LN of the display device according to the fourth embodiment may include a flat surface 661 at the central area. At the flat surface 661, the light provided from the emission layer EL may not be over-converged, but emitted at a certain viewing angle. In addition, a curved surface 663 may be provided to surround the flat surface 661. At the curved surface 663, the light provided from the emission layer EL may not be absorbed and lost by the black matrix BM placed at the peripheral area of ​​the pixel P, but may be converged or redirected to the central area of ​​the pixel P.

[0128] The light-emitting display device according to the fourth embodiment can extract or recover the amount of light loss emitted from each pixel P to the central area, thereby minimizing or at least reducing the light loss and improving the light extraction efficiency. In addition, it can provide uniform brightness in a wide viewing angle direction. As a result, the fourth embodiment of the present disclosure can provide a display device that can provide high brightness with low power consumption and can evenly distribute brightness over the entire area of ​​the display device.

[0129] <Fifth Embodiment>

[0130] In the following, reference will be made to Fig. 9 , illustrating the structure of a light-emitting display according to a fifth embodiment of the present disclosure. Fig. 9 It is along Figure 3 1 is an enlarged cross-sectional view taken along line II-II′ of FIG. 1 , for illustrating a structure of three pixels sequentially arranged in a light-emitting display device according to a fifth embodiment of the present disclosure.

[0131] The light emitting display device according to the fifth embodiment of the present disclosure may have a structure very similar to that of the fourth embodiment. The light emitting display device according to the fifth embodiment may have a structure in which the black matrix BM may penetrate the color filter layer 550 and vertically extend from the microlens LN to the upper surface of the color filter layer 550.

[0132] After forming the microlens LN on the encapsulation layer 440, the color filter layer 550 may be deposited thereon. Then, the color filter layer 550 may be patterned to expose the curved surface 663 corresponding to the bank BA in the microlens LN. The space between the patterned color filter layers 550 (i.e., between the two curved surfaces 663 of two adjacent microlenses LN) may be filled with a black resin material to form a black matrix BM.

[0133] Even though not shown in the figure, a cover layer made of a transparent resin material may be further provided on the color filter layer 550. The cover layer may have a lower refractive index than the microlenses LN and / or the color filters CF of the color filter layer 550. In this case, the black matrix BM may extend vertically from the lens layer 660, penetrate the color filter layer 550 and the cover layer, and be stacked on the upper surface of the cover layer.

[0134] The light-emitting display device according to the fifth embodiment can provide high brightness with low power consumption by minimizing the loss of light emitted from the emission layer EL due to the microlens LN and converging the light to the central area. In addition, due to the presence of the flat surface 661 of the microlens LN, the light can not be excessively concentrated in the central area, and the brightness can be evenly distributed. In addition, since the black matrix BM can extend to the color filter layer 550, the light passing through the lens layer 660 can be prevented from mixing at the boundary of the pixel P, thereby providing a clearer image quality.

[0135] <Sixth Embodiment>

[0136] In the following, reference will be made to Fig.10 , illustrating a lens processing pattern 1000 in a light emitting display device according to one or more embodiments of the present disclosure. Fig.10 It is along Figure 1 1 is an enlarged cross-sectional view taken along line III-III' of FIG. 1 , for illustrating a portion where a lens processing pattern is formed in a light emitting display device according to one or more embodiments of the present disclosure.

[0137] In the above embodiments, various arrangement structures of the color filter layer 550 and the lens layer 660 disposed in the display area AA have been examined. Specifically, the lens layer 660 may have a flat surface 661 in the central area and may have a structure that prevents the problem of excessive light being concentrated to the central area by the lens layer 660.

[0138] Hereinafter, elements and a manufacturing process for forming the flat surface 661 of the microlens LN of the lens layer 660 will be described. Figure 1 As shown, the lens processing patterns 1000 may be arranged around the display area AA to surround the display area AA.

[0139] refer to Fig.10 , that is, along Figure 1 According to the cross-sectional view taken along line III-III' in FIG. 1 , the light-emitting display device of the present disclosure may include a driving element layer 220, a light-emitting element layer 330, an encapsulation layer 440, a color filter layer 550, and a lens layer 660 sequentially disposed on a substrate 110. The driving thin film transistor DT of the driving element layer 220 and the light-emitting element layer 330 (specifically, the light-emitting diode OLE of the light-emitting element layer 330) may be disposed in the display area AA. Since the description of these elements is the same as Figures 1 to 4 The same description may not be repeated.

[0140] The gate driver 200 and the lens processing pattern 1000 may be disposed in the non-display area NDA. The gate driver 200 may have the same structure as the driving thin film transistor DT formed at the driving element layer 220. The lens processing pattern 1000 may be disposed outside the gate driver 200.

[0141] Reference Fig.10 , a dam portion DM may be further arranged at an edge region of the encapsulation layer 440. When the encapsulation layer 440 includes the first inorganic layer 441, the organic layer 443, and the second inorganic layer 445, the dam portion DM may be an element for limiting the arrangement region of the organic layer 443 beyond a specific region. Fig.10In the embodiment, the dam portion DM may be disposed outside the gate driver 200. However, not limited thereto, the dam portion DM may also be disposed closer to the display area AA than the gate driver 200.

[0142] For example, the lens processing pattern 1000 may be arranged to overlap the gate driver 200. In another example, the lens processing pattern 1000 may be disposed between the gate driver 200 and the dam portion DM. When the lens processing pattern 1000 is disposed outside the gate driver 200, the bezel area may be minimized.

[0143] The lens processing pattern 1000 may be formed by stacking a plurality of layers, or may be formed as a single material layer. For example, the lens processing pattern 1000 may be formed by stacking the dam portion DM, the color filter layer 550, and / or the photoresist material of the color filter layer 550. In another example, the lens processing pattern 1000 may be made of a non-conductive resin material different from the material of the elements of the display device.

[0144] The height of the upper surface of the lens processing pattern 1000 may be set to be the same as the height of the flat surface 661 of the microlens LN. Therefore, the upper surface of the lens processing pattern 1000 and the flat surface 661 of the microlens LN are aligned or flat with each other. For example, after forming the microlens LN having a hemispherical shape, the convex surface of the microlens LN may be formed into the flat surface 661 by pushing and / or rolling the hemispherical microlens LN with a pressurizing device such as a roller until it contacts the lens processing pattern 1000.

[0145] By forming the height of the upper surface of the lens processing pattern 1000 disposed in the non-display area NDA to match the height of the flat surface 661 of the microlens LN, and by performing a pressurization process using the lens processing pattern 1000, the microlens LN disposed over the entire area of ​​the display area AA can be simultaneously formed to have the flat surface 661. Therefore, uniform brightness with a wide viewing angle can be provided over the entire area of ​​the display area AA.

[0146] The height of the lens processing pattern 1000 may determine the height of the flat surface 661 of the microlens LN. Therefore, in the first to fifth embodiments, the lens processing pattern 1000 is formed to have a height matching the height of the flat surface 661 of the microlens LN. In one example, for the first embodiment in which the lens layer 660 is disposed on the color filter layer 550, the height of the lens processing pattern 1000 may be set higher than the height of the lens processing pattern 1000 according to the fourth embodiment (in which the lens layer 660 is disposed below the color filter layer 550).

[0147] <Seventh Embodiment>

[0148] In the following, reference Fig.11 , which shows the structure of a light-emitting display device according to a seventh embodiment of the present disclosure. Fig.11 Yes Figure 1 An enlarged cross-sectional view in which a portion “A” of FIG. 1 is enlarged to illustrate an exemplary embodiment of a lens processing pattern in one or more embodiments of the present disclosure.

[0149] The lens processing pattern 1000 according to one or more embodiments of the present disclosure may have a closed curved shape surrounding the display area AA. Specifically, the lens processing pattern 1000 may be in the shape of a rectangular strip having a certain width W. Figure 1 , Fig.10 and Fig.11 , the lens processing pattern 1000 may have a shape surrounding four sides of the display area AA.

[0150] However, the present invention is not limited thereto, and the lens processing pattern 1000 may be disposed on any two opposite sides. Alternatively, the lens processing pattern 1000 may also be disposed on three sides around the display area AA. Figure 1 In the embodiment, the lens process pattern 1000 may be arranged around the display area AA in a “Π” shape or a “∩” shape except for one side where the pad part 300 is disposed.

[0151] <Eighth Embodiment>

[0152] In the following, reference will be made to Fig.12 , illustrating the structure of a light-emitting display according to an eighth embodiment of the present disclosure. Fig.12 Yes Figure 1 FIG. 2 is an enlarged cross-sectional view in which a portion “A” of FIG. 1 is enlarged to illustrate another exemplary embodiment of a lens processing pattern in one or more embodiments of the present disclosure.

[0153] The lens processing pattern 1000 according to the eighth embodiment of the present disclosure may have a closed curved shape surrounding the display area AA. Specifically, in a rectangular strip-shaped area with a total width of W, a plurality of rectangular strips having a width less than the total width W are arranged at regular intervals or predetermined gaps. For example, Fig.12 As shown, four closed curved shapes each having a first width W1 may be continuously arranged and spaced apart by a first gap G1 .

[0154] When a plurality of closed curved shapes are continuously arranged, even if one closed curved shape is damaged, the pressurization of the flat surface 661 for forming the microlens LN can maintain the height of the lens processing pattern 1000. In this way, the height of the microlens LN disposed in the display area AA can be processed to have a uniform height. In addition, even if foreign matter may be generated during the lens processing, the foreign matter can be inserted into the space having the first gap G1, thereby preventing damage caused by the foreign matter.

[0155] <Ninth Embodiment>

[0156] In the following, reference will be made to Fig.13 , describing the structure of a light-emitting display device according to a ninth embodiment of the present disclosure. Fig.13 Yes Figure 1 FIG. 2 is an enlarged cross-sectional view in which a portion “A” of FIG. 1 is enlarged to illustrate another exemplary embodiment of a lens processing pattern in one or more embodiments of the present disclosure.

[0157] The lens processing pattern 1000 according to the ninth embodiment of the present disclosure may have a closed curved shape surrounding the display area AA. Specifically, within a rectangular stripe-shaped area having a total width W, a plurality of line segment shapes having a width less than the total width W and a length less than the total length of the lens processing pattern 1000 may be placed at regular intervals or gaps. Fig.13 As shown, a plurality of line segment shapes having a second width W2 and a second length L2 may be continuously arranged and spaced apart from each other by a second gap G2. In this case, the plurality of line segment shapes may be spaced apart at the same interval as the second gap G2 in the longitudinal direction of the line segment. However, not limited thereto, the gap in the longitudinal direction may be wider or narrower than the second gap G2.

[0158] When a plurality of segments are continuously arranged, even if one closed curved shape is damaged, the pressurization of the flat surface 661 for forming the microlens LN can maintain the height of the lens processing pattern 1000. In doing so, the height of the microlens LN disposed in the display area AA can be processed to have a uniform height. In addition, even if foreign matter may be generated during the lens processing step, the foreign matter can be inserted into the space having the second gap G2, thereby preventing damage caused by the foreign matter.

[0159] The features, structures, effects, etc. described in the above exemplary embodiments of the present disclosure are included in at least one exemplary embodiment of the present disclosure, and are not necessarily limited to the exemplary embodiments. In addition, those skilled in the art to which the present disclosure belongs may combine or modify other exemplary embodiments to achieve the features, structures, effects, etc. explained in at least one exemplary embodiment. Therefore, these combinations and modifications should be interpreted as being included in the scope of the present disclosure.

[0160] It will be apparent to those skilled in the art that various substitutions, modifications and variations may be made within the scope of the present disclosure without departing from the spirit and scope of the present disclosure. Therefore, the embodiments of the present disclosure are intended to cover various substitutions, modifications and variations of the present disclosure as long as they fall within the scope of the appended claims and their equivalents. Based on the above detailed description, such and other changes may be made to the embodiments. In general, in the following claims, the terms used should not be interpreted as limiting the claims to the specific exemplary embodiments disclosed in the specification and claims, but should be interpreted as including all possible embodiments and the full range of equivalents given by these claims. Therefore, the claims are not limited to the present disclosure.

Claims

1. A light-emitting display device, comprising: A substrate, the substrate comprising a display area and a non-display area; A plurality of pixels, wherein the plurality of pixels are arranged in the display area; a lens processing pattern, the lens processing pattern being disposed in the non-display area, the lens processing pattern surrounding the display area; a light emitting element layer, the light emitting element layer being disposed in the display area, the light emitting element layer being configured to emit light; an encapsulation layer, the encapsulation layer being located on the light-emitting element layer in the display area; as well as a color filter layer and a lens layer, wherein the color filter layer and the lens layer are located on the encapsulation layer in the display area, Wherein, the height of the upper surface of the lens processing pattern is the same as the height of the upper surface of the lens layer.

2. The light emitting display device according to claim 1, wherein the color filter layer is disposed on the encapsulation layer, and The lens layer is disposed on the color filter layer, so that the color filter layer is located between the lens layer and the encapsulation layer.

3. The light-emitting display device according to claim 1, wherein the lens layer is disposed on the encapsulation layer, and The color filter layer is disposed on the lens layer, so that the lens layer is located between the color filter layer and the encapsulation layer. 4 . The light-emitting display device according to claim 1 , wherein the lens layer comprises a plurality of micro lenses, each of the plurality of micro lenses overlapping a corresponding one of the plurality of pixels.

5. The light-emitting display device according to claim 4, wherein each of the plurality of microlenses comprises: a flat upper surface overlapping a central region of the pixel; as well as A curved side surface extends from the flat upper surface, the curved side surface overlapping an edge region of the pixel. 6 . The light emitting display device of claim 5 , wherein a height of a flat upper surface of each of the plurality of microlenses is the same as a height of an upper surface of the lens processing pattern.

7. The light-emitting display device according to claim 1, wherein the light-emitting element layer comprises: a planarization layer covering the substrate; a plurality of anode electrodes on the planarization layer, each of the plurality of anode electrodes being located at a corresponding one of the plurality of pixels; a bank exposing a portion of each of the plurality of anode electrodes and covering a peripheral region of each of the plurality of anode electrodes; an emission layer, the emission layer being disposed on the plurality of anode electrodes and the bank; as well as A cathode electrode is disposed on the emission layer, Wherein, the lens layer comprises: a plurality of microlenses, each microlens overlapping a corresponding pixel of the plurality of pixels; and a black matrix disposed between a pair of adjacent microlenses among the plurality of microlenses, the black matrix overlapping the bank, and Wherein, each of the plurality of microlenses comprises: a flat upper surface covering a central area of ​​a corresponding one of the plurality of anode electrodes; and A curved side surface extends from the flat upper surface, the curved side surface overlapping the bank. 8 . The light emitting display device according to claim 7 , wherein the black matrix overlaps with curved side surfaces of a pair of adjacent microlenses among the plurality of microlenses.

9. The light emitting display device according to claim 7, wherein the color filter layer is disposed on the encapsulation layer, and The lens layer is disposed on the color filter layer, so that the color filter layer is located between the lens layer and the encapsulation layer.

10. The light emitting display device according to claim 9, further comprising: A cover layer is disposed on the lens layer, the cover layer including a transparent material having a refractive index smaller than a refractive index of the plurality of microlenses. 11 . The light emitting display device according to claim 10 , wherein the black matrix passes through the entire thickness of the cover layer and extends to the upper surface of the cover layer.

12. The light-emitting display device according to claim 7, wherein the lens layer is disposed on the encapsulation layer, and The color filter layer is disposed on the lens layer, so that the lens layer is located between the color filter layer and the encapsulation layer. 13 . The light emitting display device according to claim 12 , wherein the black matrix passes through the entire thickness of the color filter layer and extends to an upper surface of the color filter layer.

14. The light-emitting display device according to claim 12, further comprising: A cover layer is disposed on the color filter layer, the cover layer including a transparent material having a refractive index smaller than a refractive index of the plurality of micro lenses. 15 . The light emitting display device according to claim 14 , wherein the black matrix extends to an upper surface of the cover layer through an entire thickness of the color filter layer and an entire width of the cover layer. 16 . The light emitting display device of claim 1 , wherein the lens processing pattern comprises a closed curved shape surrounding the display area, the closed curved shape having a width.

17. The light-emitting display device according to claim 1, wherein the lens processing pattern includes a plurality of closed curved shapes, each of which has a predetermined width, and the plurality of closed curved shapes are spaced apart from each other with a predetermined gap between a pair of closed curved shapes among the plurality of closed curved shapes. 18 . The light emitting display device of claim 1 , wherein the lens processing pattern comprises a plurality of segments, each segment having a predetermined width and a predetermined length, and the plurality of segments are spaced apart from each other with a predetermined gap between a pair of segments among the plurality of segments.

19. The light emitting display device according to claim 1, further comprising: A driving element layer is located between the substrate and the light emitting element layer in the display area, and is configured to drive the light emitting element layer.

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