Display device

Abstract

The present disclosure relates to a display device, the display device comprising: a display layer having a display area including a plurality of pixel areas and a peripheral area at least partially surrounding the display area; and a cover layer provided on the display layer to encapsulate the display area. The cover layer comprises: a light blocking portion overlapping the display area and the peripheral area and comprising a plurality of openings to transmit light from the plurality of pixel areas and block light in the peripheral area; a first protrusion provided on the light blocking portion in the peripheral area and surrounding the display area; and an outer cover layer covering the display area and contacting a side surface of the first protrusion.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure generally relate to a display device and a method for manufacturing the display device, and more particularly, to a display device including an encapsulation layer and a method for manufacturing the display device without using a photomask process that may damage a light emitting element such as an organic light emitting diode. Background Art

[0002] The organic light emitting diode display device includes two electrodes and a light emitting layer disposed between the two electrodes, and electrons injected from one electrode and holes injected from the other electrode are combined with each other in the light emitting layer to generate excitons. The generated excitons transition from an excited state to a ground state, thereby releasing energy to emit light.

[0003] The organic light emitting diode display device includes a plurality of pixels, each pixel includes an organic light emitting diode as a self-emitting element, and a plurality of transistors and at least one capacitor for driving the organic light emitting diode are formed in each pixel. The plurality of transistors basically include a switching transistor and a driving transistor. The organic light emitting diode display device resonates and emits the generated light, and the contrast of the generated light may be reduced due to reflection of external light in the plurality of transistors, the capacitor, and signal lines connected thereto.

[0004] In order to improve contrast, a polarizing film may be bonded to an organic light emitting diode display device. The polarizing film includes a linear polarizing film and a retardation film. Since the thickness of the polarizing film is as thick as about 200 μm, it is difficult to make the organic light emitting diode display device thin, and its production cost increases.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore the above information may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. Summary of the invention

[0006] The applicant has found that the characteristics of the organic light emitting diode in the display device may be changed by the short-wavelength light generated in the process of making the encapsulation layer from the overcoat material, so the quality of the organic light emitting diode display device may be deteriorated. In addition, by forming the overcoat layer in the area other than the display area of ​​the organic light emitting diode display device, the overcoat material may be wasted.

[0007] The display device and the method for manufacturing the display device constructed according to the principles and exemplary embodiments of the present disclosure can improve the contrast of the display device without using a polarizing film, which can also reduce manufacturing costs and processes. In addition, the manufacturing method of the present disclosure can reduce the waste of the outer coating material used to form the encapsulation layer of the organic light emitting diode display device, and shorten the manufacturing process by, for example, excluding the exposure and development processes from the process of forming the encapsulation layer.

[0008] A display device and a method of manufacturing the display device constructed according to the principles and exemplary embodiments of the present disclosure can prevent or at least reduce changes in electrical characteristics of a light emitting diode.

[0009] Additional features of the inventive concept will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concept.

[0010] According to one aspect of the present disclosure, a display device includes: a display layer having a display area including a plurality of pixel areas and a peripheral area at least partially surrounding the display area; and a covering layer disposed on the display layer to encapsulate the display area, wherein the covering layer includes: a light blocking portion overlapping the display area and the peripheral area and including a plurality of openings to transmit light from the plurality of pixel areas and block light in the peripheral area; a first protrusion disposed on the light blocking portion in the peripheral area and surrounding the display area; and an outer covering layer covering the display area and contacting a side surface of the first protrusion.

[0011] The cover layer may further include a plurality of color filters disposed on the light blocking portion and overlapping the plurality of openings.

[0012] The plurality of color filters may include a first color filter of a first color, a second color filter of a second color, and a third color filter of a third color, and the first color filter, the second color filter, and the third color filter may overlap different openings.

[0013] The first protrusion may include a first dam including a first layer made of the same material as the first color filter.

[0014] The display device may further include: a second dam disposed on the light blocking portion in the peripheral area and disposed between the first dam and the display area to surround the display area, wherein the second dam includes a second layer, and the second layer includes the same material as one of the first to third color filters.

[0015] The first dam may further include a second layer disposed on the first layer, and the second layer may include the same material as the second color filter.

[0016] The second layer may have a width substantially equal to or less than a width of the first layer.

[0017] The display device may further include: a second dam, arranged on the light blocking portion in the peripheral area and arranged between the first dam and the display area to surround the display area, wherein the second dam includes one layer or two layers, wherein the one layer includes the same material as one of the first to third color filters, and the two layers include the same material as two of the first to third color filters.

[0018] The first dam may further include a third layer disposed on the second layer, and the third layer may include the same material as the third color filter.

[0019] The third layer may have a width substantially equal to or smaller than a width of the second layer.

[0020] The display device may further include: a second dam, arranged on the light blocking portion in the peripheral area and arranged between the first dam and the display area to surround the display area, wherein the second dam includes one layer, two layers or three layers, and wherein the one layer includes the same material as one of the first to third color filters, the two layers include the same material as two of the first to third color filters, and the three layers include the same material as the first to third color filters.

[0021] The first layer may have a thickness substantially the same as that of the first color filter; the second layer may have a thickness substantially the same as that of the second color filter; and the third layer may have a thickness substantially the same as that of the third color filter.

[0022] The outer coating may include an ultraviolet wavelength blocker.

[0023] The display device may further include a touch sensor layer disposed between the display layer and the cover layer.

[0024] According to another aspect of the present disclosure, a method for manufacturing a display device includes the following steps: forming a first layer including a plurality of light-emitting diodes; forming a second layer including a plurality of touch electrodes on the first layer; forming a light blocking portion including a plurality of openings overlapping the plurality of light-emitting diodes on the second layer; forming a plurality of color filters in the plurality of openings; simultaneously with forming the plurality of color filters in the plurality of openings, forming a first protrusion in a peripheral area at least partially surrounding the plurality of light-emitting diodes with the same material as at least one of the plurality of color filters; and forming a third layer covering the plurality of light-emitting diodes.

[0025] The step of forming the third layer may include coating an overcoat material in a region surrounded by the first protrusion and then baking the overcoat material without exposure to short wavelength light.

[0026] The overcoat material may include an ultraviolet wavelength blocker.

[0027] The forming of the first protrusion may include forming a first protrusion layer with the same material as a first color filter among the plurality of color filters.

[0028] The forming of the first protrusion may further include forming another layer on the first protrusion layer with the same material as the second color filter of the plurality of color filters.

[0029] The method may further include the steps of forming a second protrusion between the first protrusion and a display area, and disposing the plurality of light emitting diodes in the display area with the same material as at least one of the plurality of color filters when the plurality of color filters are formed in the plurality of openings.

[0030] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the disclosure and together with the description serve to explain the inventive concept.

[0032] Figure 1 is a cross-sectional view of a portion of a peripheral region and a portion of a display region of a display device constructed according to the principles of the present disclosure.

[0033] Figure 2 yes Figure 1 A cross-sectional view of an exemplary embodiment of a display area of ​​FIG.

[0034] Figure 3 yes Figure 1 A top plan view of an exemplary embodiment of a display device.

[0035] Figure 4A is a flow chart of a method of manufacturing a display device according to the principles of the present disclosure.

[0036] Figure 4B is a top plan view showing an exemplary embodiment of a region where an overcoat material is formed in one of the exemplary processes of manufacturing a display device according to principles of the present disclosure.

[0037] Figure 5 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​another exemplary embodiment of a display device constructed according to the principles of the present disclosure.

[0038] Figure 6 is a cross-sectional view of a portion of a peripheral region and a portion of a display region of yet another exemplary embodiment of a display device constructed according to the principles of the present disclosure.

[0039] Figure 7 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0040] Figure 8 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0041] Fig. 9 is a top plan view of a display device constructed according to the principles of the present disclosure.

[0042] Fig.10 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0043] Fig.11 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0044] Fig.12 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0045] Fig.13 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0046] Fig.14 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0047] Fig.15is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0048] Fig.16 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0049] Fig.17 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0050] Fig.18 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0051] Fig.19 is an experimental graph of light transmittance versus the concentration of the UV wavelength blocker in the outer coating.

[0052] Fig. 20 is a graph of the transmittance of ultraviolet light relative to the concentration of the ultraviolet wavelength blocker of the outer coating. DETAILED DESCRIPTION

[0053] In the following description, for the purpose of explanation, many specific details are set forth to provide a thorough understanding of various exemplary embodiments or implementations of the present disclosure. As used herein, "embodiment" and "implementation" are interchangeable words, and the interchangeable words are non-limiting examples of devices or methods using one or more of the inventive concepts disclosed herein. However, it is apparent that various exemplary embodiments can be practiced without these specific details or using one or more equivalent arrangements. In other cases, well-known structures and devices are shown in the form of block diagrams to avoid unnecessary obscurity of various exemplary embodiments. In addition, various exemplary embodiments may be different, but do not have to be exclusive. For example, without departing from the inventive concept, the specific shape, configuration and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0054] Unless otherwise specified, the illustrated exemplary embodiments will be understood as providing exemplary features of different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions and / or aspects, etc. (hereinafter, individually or collectively referred to as "elements") of the various embodiments may be further combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0055] The use of cross hatching and / or shading in the drawings is generally provided to clarify the boundaries between adjacent elements. Therefore, unless otherwise specified, the presence or absence of cross hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, ratio, commonality between the elements shown, and / or any other characteristics, attributes, properties, etc. of the elements. In addition, in the drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. When the exemplary embodiments can be implemented differently, a specific process sequence can be performed differently from the described sequence. For example, two processes described in succession can be performed substantially simultaneously or in an order opposite to the described sequence. In addition, the same reference numerals represent the same elements.

[0056] When an element or layer is referred to as being "on" another element or layer, "connected to" or "bonded to" another element or layer, the element or layer may be directly on, directly connected to or directly bonded to another element or layer, or there may be an intermediate element or intermediate layer. However, when an element or layer is referred to as being "directly on" another element or layer, "directly connected to" or "directly bonded to" another element or layer, there is no intermediate element or intermediate layer. For this reason, the term "connection" may refer to a physical connection, an electrical connection and / or a fluid connection with or without an intermediate element. In addition, the D1 axis, the D2 axis and the D3 axis are not limited to the three axes of a rectangular coordinate system, such as an x-axis, a y-axis and a z-axis, and may be interpreted in a broader sense. For example, the D1 axis, the D2 axis and the D3 axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ for example. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] Although the terms "first", "second", etc. may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another element. Therefore, without departing from the teachings of the present disclosure, the first element discussed below may be named as the second element.

[0058] For descriptive purposes, spatially relative terms such as "below," "beneath," "under," "down," "above," "upper," "higher," and "side" (e.g., as in "sidewall") may be used herein to describe the relationship of one element to another element(s) as shown in the accompanying drawings. In addition to the orientations depicted in the accompanying drawings, the spatially relative terms are intended to cover different orientations of the device in use, operation, and / or manufacture. For example, if the device is flipped in the accompanying drawings, an element described as being "below" or "below" other elements or features would subsequently be positioned "above" the other elements or features. Thus, the exemplary term "below" can cover both "above" and "below" orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), and therefore, the spatially relative descriptors used herein are interpreted accordingly.

[0059] The terms used here are for the purpose of describing specific embodiments, and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "a kind of" and "the" are also intended to include plural forms. In addition, when the terms "comprise", "include", "have" and / or "contain" are used in this specification, it is explained that there are stated features, wholes, steps, operations, elements, components and / or their groups, but it is not excluded that there are or add one or more other features, wholes, steps, operations, elements, components and / or their groups. It is also noted that, as used herein, the terms "substantially", "approximately" and other similar terms are used as approximate terms rather than degree terms, so as to explain the inherent deviations of measured values, calculated values ​​and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0060] Various exemplary embodiments are described herein with reference to cross-sectional views and / or exploded views that are schematic diagrams of idealized exemplary embodiments and / or intermediate structures. Thus, variations in the shape of the diagrams, for example, due to manufacturing techniques and / or tolerances, are anticipated. Therefore, the exemplary embodiments disclosed herein should not necessarily be construed as being limited to the shapes of the specifically illustrated regions, but will include deviations in shape, for example, due to manufacturing. In this manner, the regions illustrated in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and therefore, are not necessarily intended to be limiting.

[0061] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. Unless explicitly defined as such herein, terms (such as those defined in general dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formalized sense.

[0062] Figure 1 is a cross-sectional view of a portion of a peripheral region and a portion of a display region of a display device constructed according to the principles of the present disclosure. Figure 2 yes Figure 1 A cross-sectional view of an exemplary embodiment of a display area of ​​FIG. Figure 3 yes Figure 1 A top plan view of an exemplary embodiment of a display device.

[0063] Reference Figures 1 to 3 , the display device includes a display layer 100, a touch sensor layer 200, and a cover layer. The display layer 100 includes a plurality of pixels to display an image. The touch sensor layer 200 is disposed on the display layer 100 and detects a contact touch or a non-contact touch of a user. The cover layer may be in the form of a protective layer such as an encapsulation layer 300, which is disposed on the touch sensor layer 200 and encapsulates the display layer 100 and the touch sensor layer 200 to protect them.

[0064] In a plan view, the display layer 100 may include a display area DA for displaying an image and a peripheral area PA disposed around the display area DA. The display area DA includes a plurality of pixels. The display area DA corresponds to a screen on which an image is displayed. In the peripheral area PA, circuits and / or signal lines for generating and / or transmitting various signals to the plurality of pixels are disposed. The peripheral area PA may at least partially surround the display area DA.

[0065] First, the stack structure of the display layer 100 and the touch sensor layer 200 in the display area DA will be described in detail.

[0066] The display layer 100 may include a substrate 110 , a transistor TR disposed on the substrate 110 , and an organic light emitting diode OLED connected to the transistor TR.

[0067] The substrate 110 may be a flexible substrate formed of a polymer such as polyimide (PI), polyamide (PA), and polyethylene terephthalate (PET).

[0068] The first insulating layer 120 is disposed on the substrate 110. The first insulating layer 120 may be used to block impurities diffused from the substrate 110 from reaching the semiconductor layer A in a process of forming the semiconductor layer A and reduce stress applied to the substrate 110. The first insulating layer 120 may include an inorganic insulating material such as silicon oxide or silicon nitride.

[0069] The semiconductor layer A of the transistor TR is disposed on the first insulating layer 120. The semiconductor layer A may include a channel region overlapping the gate electrode G and doped source and drain regions at opposite sides of the channel region. The semiconductor layer A may include polysilicon, amorphous silicon, or an oxide semiconductor.

[0070] The second insulating layer 130 is disposed on the semiconductor layer A. The second insulating layer 130 may include an inorganic insulating material. The second insulating layer 130 may be referred to as a gate insulating layer.

[0071] A gate conductor including a gate electrode G of the transistor TR is disposed on the second insulating layer 130. The gate conductor may include metal such as molybdenum (Mo), copper (Cu), aluminum (Al), silver (Ag), chromium (Cr), tantalum (Ta), and titanium (Ti), or a metal alloy thereof.

[0072] The third insulating layer 140 is disposed on the second insulating layer 130 and the gate conductor. The third insulating layer 140 may include an inorganic insulating material. The third insulating layer 140 may be referred to as an interlayer insulating layer.

[0073] A data conductor including a source electrode S and a drain electrode D of the transistor TR is disposed on the third insulating layer 140. The source electrode S and the drain electrode D are connected to a source region and a drain region of the semiconductor layer A through contact holes formed in the second insulating layer 130 and the third insulating layer 140, respectively. The data conductor may include a metal or a metal alloy.

[0074] The gate electrode G, the source electrode S, the drain electrode D, and the semiconductor layer A form a transistor TR.

[0075] The fourth insulating layer 150 is disposed on the data conductor. The fourth insulating layer 150 may include an organic insulating material such as polyimide, acrylic polymer, or siloxane polymer. The fourth insulating layer 150 may be referred to as a planarization layer.

[0076] The first electrode E1 of the organic light emitting diode OLED is disposed on the fourth insulating layer 150. The first electrode E1 may be connected to the drain electrode D through a contact opening formed in the fourth insulating layer 150. The first electrode E1 may include a metal such as Ag, Ni, Au, Pt, Al, Cu, AlNd, and AlNiLa, or a metal alloy. The first electrode E1 may include a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), etc.

[0077] The fifth insulating layer 160 provided with an opening OP1 overlapping the first electrode E1 is provided on the fourth insulating layer 150. The opening OP1 of the fifth insulating layer 160 may define a pixel region of each of a plurality of pixels, and the fifth insulating layer 160 may be referred to as a pixel defining layer. In a plan view, the pixel region may refer to a region occupied by the light emitting layer EL of the organic light emitting diode OLED. The fifth insulating layer 160 may include an organic insulating material. The fifth insulating layer 160 may include a black pigment, and the transistor TR and various signal lines provided under the fifth insulating layer 160 may not be visible to the user.

[0078] The light emitting layer EL is disposed on the first electrode E1 and in a pixel region defined by the opening OP1 of the fifth insulating layer 160 .

[0079] The second electrode E2 is disposed on the light emitting layer EL. The second electrode E2 may cover the entire display area DA. A common voltage may be applied to the second electrode E2. The second electrode E2 may be formed of a metal having a low work function such as calcium (Ca), barium (Ba), magnesium (Mg), aluminum (Al), or silver (Ag) as a relatively thin layer so that the second electrode E2 may have light transmittance. The second electrode E2 may include a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0080] The first electrode E1, the light emitting layer EL, and the second electrode E2 form an organic light emitting diode OLED of one pixel. The first electrode E1 may be an anode of the organic light emitting diode OLED, and the second electrode E2 may be a cathode of the organic light emitting diode OLED. The first electrode E1 may be referred to as a pixel electrode, and the second electrode E2 may be referred to as a common electrode. The plurality of organic light emitting diodes OLED included in the display layer 100 may emit three primary colors. For example, the plurality of organic light emitting diodes OLED may include: a red organic light emitting diode (e.g., Figure 3 R in), a green organic light emitting diode emitting green light (e.g., Figure 3 G in) and a blue organic light emitting diode emitting blue light (e.g., Figure 3 B) in Figure 2 In the embodiment, one of the three organic light emitting diodes OLED is a red organic light emitting diode, another one of the three organic light emitting diodes OLED is a green organic light emitting diode, and the others are blue organic light emitting diodes.

[0081] The sixth insulating layer 170 is disposed on the second electrode E2. The sixth insulating layer 170 covers the entire display area DA to seal the organic light emitting diode OLED. The sixth insulating layer 170 may include an organic insulating material.

[0082] The seventh insulating layer 180 may be disposed on the sixth insulating layer 170. The seventh insulating layer 180 may cover the entire display area DA. The seventh insulating layer 180 may include an inorganic insulating material. The sixth insulating layer 170 including an organic insulating material is more flexible than the seventh insulating layer 180 including an inorganic insulating material. Compared with the sixth insulating layer 170 including an organic insulating material, the seventh insulating layer 180 including an inorganic insulating material is excellent in moisture-proof effect.

[0083] The touch sensor layer 200 may include an eighth insulating layer 210 , a ninth insulating layer 220 , and a plurality of touch electrodes TE.

[0084] The eighth insulating layer 210 is disposed on the seventh insulating layer 180, and the ninth insulating layer 220 is disposed on the eighth insulating layer 210. The ninth insulating layer 220 may cover the entire display area DA. The eighth insulating layer 210 and the ninth insulating layer 220 may include an organic insulating material.

[0085] A plurality of touch electrodes TE are disposed between the eighth insulating layer 210 and the ninth insulating layer 220. The plurality of touch electrodes TE may be disposed between adjacent pixel regions without overlapping with the opening OP1 of the fifth insulating layer 160. The plurality of touch electrodes TE may include a plurality of transmitting electrodes for transmitting touch signals for touch detection and a plurality of receiving electrodes for forming capacitance with the transmitting electrodes. The plurality of transmitting electrodes and the plurality of receiving electrodes may cross each other, and the plurality of transmitting electrodes or the plurality of receiving electrodes may be connected to each other at the intersection through the contact opening formed in the eighth insulating layer 210.

[0086] Next, the stacked structure of the encapsulation layer 300 in the display area DA and the peripheral area PA will be described. In the peripheral area PA, the display layer 100 does not include the organic light emitting diode OLED, and the touch sensor layer 200 may not include the touch electrode TE. A plurality of insulating layers and a plurality of signal lines may be provided in the display layer 100 and the touch sensor layer 200 located in the peripheral area PA. The structure of the display layer 100 and the touch sensor layer 200 located in the peripheral area PA is not limited, and for the sake of clarity, the detailed structure of the display layer 100 and the touch sensor layer 200 located in the peripheral area PA is omitted.

[0087] The encapsulation layer 300 may include a light blocking portion 310 , a plurality of color filters 320 , an overcoating layer 330 , and a first protrusion which may be in the form of a dam 340 .

[0088] The light blocking portion 310 includes a plurality of openings OP2 in the display area DA corresponding to the plurality of openings OP1 of the fifth insulating layer 160. The light blocking portion 310 may cover the entire peripheral area PA to block light in the peripheral area PA. The light blocking portion 310 may include an organic material or a mixture of an inorganic material and an organic material, and the light blocking portion 310 includes a black pigment to block light.

[0089] The plurality of openings OP2 of the light blocking portion 310 may overlap the plurality of openings OP1 of the fifth insulating layer 160. The light blocking portion 310 may have the same planar pattern as the fifth insulating layer 160 in the display area DA. Figure 3 As shown in , a plurality of pixels may be arranged in the form of fan-tiles in a plan view, and the light blocking portion 310 may have the same planar pattern (e.g., a grid pattern) as the fifth insulating layer 160. Here, each pixel may correspond to a pixel region in which the light of the light emitting layer EL is emitted. The light blocking portion 310 may include an opening OP2 having a width wider than that of the opening OP1 of the fifth insulating layer 160 (i.e., the pixel region in which the light of the light emitting layer EL is emitted). For example, the distance between adjacent openings OP1 of the fifth insulating layer 160 may be about 16 μm to 17 μm, and the distance between adjacent openings OP2 of the light blocking portion 310 may be about 6 μm to 7 μm.

[0090] A plurality of color filters 320 are arranged on the light blocking portion 310. The plurality of color filters 320 overlap with the plurality of openings OP2 of the light blocking portion 310. The plurality of color filters 320 may include color filters of colors corresponding to the colors emitted by the organic light emitting diode OLED. The plurality of color filters 320 may include a first color filter of a first color, a second color filter of a second color, and a third color filter of a third color. The first color filter, the second color filter, and the third color filter overlap with different openings OP2 of the light blocking portion 310. For example, the plurality of color filters 320 may include a red color filter, a green color filter, and a blue color filter. The red color filter overlaps with the red organic light emitting diode, the green color filter overlaps with the green organic light emitting diode, and the blue color filter may overlap with the blue organic light emitting diode.

[0091] The plurality of color filters 320 may include colored dyes or quantum dot materials. The core of the quantum dot may be selected from II-VI group compounds, III-V group compounds, IV-VI group compounds, IV group elements, IV group compounds, and combinations thereof.

[0092] The II-VI compounds can be selected from: binary compounds selected from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; ternary compounds selected from AgInS, CuInS, CdSeS, CdSeTe, CdSTe, InZnP, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; and four-element compounds selected from HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0093] The III-V group compounds can be selected from: binary compounds selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof; ternary compounds selected from GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP and mixtures thereof; and quaternary compounds selected from GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof.

[0094] The IV-VI group compound may be selected from: a binary compound selected from SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof; a ternary compound selected from SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; and a quaternary compound selected from SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. The IV group element may be selected from Si, Ge and mixtures thereof. The IV group compound may be a binary compound selected from SiC, SiGe and mixtures thereof.

[0095] In this case, the two-element compound, the three-element compound or the four-element compound may be present in the particle at a substantially uniform concentration, or the two-element compound, the three-element compound or the four-element compound may be respectively divided into states of being present in the same particle at locally different concentrations. In addition, a core-shell structure in which some quantum dots surround some other quantum dots may be possible. The interface between the core and the shell may have a concentration gradient in which the concentration of the element of the shell decreases as it approaches its center.

[0096] In some embodiments, quantum dots may have a core-shell structure including a core comprising nanocrystals and a shell surrounding the core. The shell of the quantum dot may be used as a passivation layer for maintaining semiconductor properties by preventing chemical denaturation of the core and / or as a charging layer for applying electrophoretic properties to the quantum dot. The shell may be a single layer or multiple layers. The interface between the core and the shell may have a concentration gradient in which the concentration of the element of the shell decreases as it approaches its center. Examples of shells of quantum dots include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0097] For example, metal or nonmetal oxides can be: binary compounds, such as SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 and NiO, etc.; or ternary compounds, such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 and CoMn 2 O 4 etc., but the exemplary embodiments are not limited thereto.

[0098] In addition, the semiconductor compound may be CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP or AlSb, etc., but the exemplary embodiment is not limited thereto.

[0099] The full width at half maximum (FWHM) of the emission wavelength spectrum of the quantum dots can be equal to or less than about 45 nm, preferably equal to or less than about 40 nm, more preferably equal to or less than about 30 nm, and within this range, color purity or color reproducibility can be improved. In addition, since the light emitted by the quantum dots is emitted in all directions, the viewing angle of the light can be improved.

[0100] In addition, the shape of quantum dots is not particularly limited to a specific shape generally used in the art, but may have a spherical, pyramidal, multi-arm or cubic nanoparticle shape, nanotube shape, nanowire shape, nanofiber shape or nanosheet particle shape, etc.

[0101] Quantum dots can control the color of emitted light according to their particle size, so quantum dots can have various luminescent colors, such as blue, red, and green.

[0102] The first dam 340 is disposed on the light blocking portion 310 located in the peripheral area PA. The first dam 340 may completely surround the display area DA along the peripheral area PA. The first dam 340 may include one to three layers formed simultaneously with one to three color filters of the first to third color filters. Figure 1 A case is shown in which the first dam 340 includes a first layer 341 , a second layer 342 , and a third layer 343 .

[0103] When the first color filter, the second color filter, and the third color filter are sequentially formed in the display area DA, the first layer 341 of the first dam 340 in the peripheral area PA may be formed together with the first color filter, the second layer 342 may be formed together with the second color filter on the first layer 341, and the third layer 343 may be formed together with the third color filter on the second layer 342. Therefore, the first layer 341 is made of the same material as the first color filter, the second layer 342 is made of the same material as the second color filter, and the third layer 343 is made of the same material as the third color filter.

[0104] The first color filter is one of red, green and blue filters, the second color filter is one of the other colors among red, green and blue filters, and the third color filter can be another one of red, green and blue filters.

[0105] The overcoat 330 is disposed on the light blocking portion 310 and the color filter 320 and covers the entire display area DA. The overcoat 330 contacts the side surface LS of the first dam 340 located in the peripheral area PA. The overcoat 330 includes a transparent organic material or a mixture of an inorganic material and an organic material, and can be formed by an inkjet coating method. The overcoat 330 may include an ultraviolet wavelength blocker (which may be referred to as an ultraviolet absorber). The ultraviolet wavelength blocker is a material capable of absorbing light within the wavelength range of ultraviolet rays, and the ultraviolet wavelength blocker may include a material capable of absorbing light within the wavelength range of ultraviolet rays, such as hydroxyphenyl-benzophenone, oxalic acid amide, triazine, oxalic acid anilide, cyanoacrylate, salicylic acid, and hydroxyphenyl pyrimidine. However, the ultraviolet wavelength blocker is not limited thereto. Because the overcoat 330 includes the ultraviolet wavelength blocker, the overcoat 330 can prevent external ultraviolet rays from being transmitted to the inside of the overcoat 330, and can prevent the characteristics of the organic light emitting diode OLED from being changed by external ultraviolet rays.

[0106] The first dam 340 blocks the overcoat material forming the overcoat 330 from flowing out of the peripheral area PA when the overcoat 330 is formed in the display area DA.

[0107] The light blocking portion 310 may be formed to have a first thickness DP1, and the color filter 320 may be formed to have a second thickness DP2 greater than the first thickness DP1. Figure 2 As shown in , the overcoat 330 may be formed to have a third thickness DP3 at a portion overlapping with the color filter 320, and a fourth thickness DP4 at a portion not overlapping with the color filter 320 (a portion contacting the light blocking portion 310). The sum of the first thickness DP1 and the fourth thickness DP4 is substantially equal to the sum of the second thickness DP2 and the third thickness DP3. That is, the upper surface of the overcoat 330 is formed to be substantially flat. For example, the first thickness DP1 may be about 1.1 μm, the second thickness DP2 may be about 2.7 μm, the third thickness DP3 may be about 1.5 μm, and the fourth thickness DP4 may be about 3.1 μm.

[0108] The respective thicknesses of the first layer 341, the second layer 342, and the third layer 343 of the first dam 340 may be the same as the second thickness DP2 of the color filter 320. Figure 1 In the illustrated embodiment, the first dam 340 may be formed to have a thickness three times greater than the second thickness DP2. Since the thickness of the first dam 340 is greater than the fourth thickness DP4 of the overcoat 330, the first dam 340 may block the overcoat material from flowing out of the peripheral area PA. The fourth thickness DP4 of the overcoat 330 may be determined within a range not exceeding the thickness of the first dam 340.

[0109] The first dam 340 may be formed in two layers or one layer according to the fourth thickness DP4 of the overcoat layer 330. Figure 5 and Figure 6 This is described in .

[0110] The first layer 341 may be formed with a first width W1, the second layer 342 may be formed with a second width W2, and the third layer 343 may be formed with a third width W3. The widths of the first layer 341, the second layer 342, and the third layer 343 refer to the lengths in a direction substantially perpendicular to the boundary between the display area DA and the peripheral area PA (a direction substantially parallel to the surface of the substrate 110). The first width W1 of the first layer 341 is smaller than the width of the peripheral area PA. The first dam 340 may be formed such that its width gradually decreases from its lower layer to its upper layer. Figure 1 As shown in , the second width W2 of the second layer 342 may be smaller than the first width W1 of the first layer 341 , and the third width W3 of the third layer 343 may be smaller than the second width W2 of the second layer 342 .

[0111] Figure 4A is a flow chart of a method of manufacturing a display device according to the principles of the present disclosure. Figure 4B is a top plan view illustrating an exemplary embodiment of a region in which an overcoat material is formed in one of the exemplary processes of manufacturing a display device according to principles of the present disclosure.

[0112] Will refer to Figure 4A and Figure 4B Description Made in Figures 1 to 3 Six display devices can be manufactured on one substrate 110 through the same process.

[0113] Reference Figures 1 to 3 and Figure 4A In step S110 , a display layer 100 including a plurality of transistors TR and a plurality of organic light emitting diodes OLED is formed. In step S120 , a touch sensor layer 200 including a plurality of touch electrodes TE is formed on the display layer 100 .

[0114] In step S130, a light blocking portion 310 including a plurality of openings OP2 corresponding to and / or overlapping the plurality of organic light emitting diodes OLED is formed on the touch sensor layer 200. Figure 4B, a mask key MK used as a position reference of a mask for forming the color filter 320 may be provided in the peripheral area PA. The light blocking portion 310 is formed to cover the peripheral area PA except for a portion of the peripheral area PA in which the mask key MK is formed. Therefore, the light blocking portion 310 has a maximum width W5 and a minimum width W6 in the peripheral area PA. For example, in the peripheral area PA, the maximum width W5 of the light blocking portion 310 is about 1450 μm, and the minimum width W6 of the light blocking portion 310 may be about 900 μm.

[0115] Return to reference Figures 1 to 3 and Figure 4A At step S140, a plurality of color filters 320 are formed in the plurality of openings OP2 of the light blocking portion 310. The plurality of color filters 320 may include first, second, and third color filters corresponding to colors emitted by the organic light emitting diode OLED.

[0116] In step S150, when forming a plurality of color filters 320, the first dam 340 is formed of the same material as at least one color filter 320 in the plurality of color filters 320 in the peripheral area PA. The first dam 340 may include one to three layers formed simultaneously with one to three color filters selected from the first to third color filters. For example, the first dam 340 includes a first layer 341, which may be formed of the same material as the first color filter in the plurality of color filters 320. The first dam 340 may also include a second layer 342, which may be formed on the first layer 341 with the same material as the second color filter in the plurality of color filters 320. The first dam 340 may also include a third layer 343, which may be formed on the second layer 342 with the same material as the third color filter in the plurality of color filters 320.

[0117] In step S160, after forming the first dam 340, the overcoat layer 330 is formed to cover the display area DA. Figure 4B , the overcoat material OC is coated in the area surrounded by the first dam 340 by an inkjet coating method. The overcoat material OC may be formed to have a substantially constant thickness in the area surrounded by the first dam 340 without flowing out from the peripheral area PA due to the first dam 340. After the overcoat material OC is formed, the overcoat layer 330 may be formed by baking the overcoat material OC at a predetermined temperature. That is, the overcoat material OC is not coated on the outer area NOC of the first dam 340, and the overcoat layer 330 is not formed on the outer area NOC of the first dam 340.

[0118] When a plurality of display devices are manufactured on one substrate 110 by the same process, the first dam 340 is first formed before forming the overcoat layer 330, so that the overcoat material OC can be coated only on the area surrounded by the first dam 340, and the overcoat layer 330 can be formed by performing a baking process without an exposure process and a development process.

[0119] When the overcoat material OC is applied without forming the first dam 340, the overcoat material OC should be applied on substantially the entire surface of the substrate 110 so that the overcoat material OC can be applied with a predetermined substantially uniform thickness. Then, an exposure process and a development process for removing the overcoat material OC of the outer area NOC of the display device other than the display area DA and the peripheral area PA should be performed. The electrical characteristics of the organic light emitting diode OLED of the display layer 100 may be changed due to the short wavelength light emitted during the exposure process, and thus the display quality may be deteriorated. In addition, since the overcoat material OC should be formed up to the outer area NOC, the overcoat material OC may be wasted.

[0120] However, since the first dam 340 is first formed before forming the overcoat 330, there is no need to perform an exposure process and a development process, and changes in the electrical characteristics of the organic light emitting diode OLED according to the exposure process can be prevented or at least reduced. In addition, the overcoat material OC can be applied in the area surrounded by the first dam 340 to prevent the overcoat material OC from being wasted. In addition, although the characteristics of the ultraviolet wavelength blocker may be changed by the exposure process and the development process, since the overcoat 330 is formed without the exposure process and the development process, the ultraviolet wavelength blocker can be added to the overcoat material OC, and the overcoat 330 can include the ultraviolet wavelength blocker to protect the organic light emitting diode OLED from external short wavelengths.

[0121] On the other hand, when the first dam 340 is formed, a second dam 350 (see Fig. 9 ). The second dam 350 may be disposed between the first dam 340 and the display area DA. The second dam 350 will be described later.

[0122] Figure 5 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​another exemplary embodiment of a display device constructed according to the principles of the present disclosure.

[0123] Reference Figure 5 , the first dam 340 includes a first layer 341 and a second layer 342 , and the second width W2 of the second layer 342 is smaller than the first width W1 of the first layer 341 . That is, Figure 5 It shows that from Figures 1 to 3The illustrated embodiment omits the exemplary embodiment of the third layer 343 of the first dam 340. In addition to these differences, the above reference Figures 1 to 3 The features of the described embodiments may be compared with those of Figure 5 The embodiments described are the same, therefore, reference will be omitted. Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0124] Figure 6 is a cross-sectional view of a portion of a peripheral region and a portion of a display region of yet another exemplary embodiment of a display device constructed according to the principles of the present disclosure.

[0125] Reference Figure 6 , the first dam 340 includes a first layer 341. That is, Figure 6 It shows that Figures 1 to 3 The exemplary embodiment of the second layer 342 and the third layer 343 of the first dam 340 is omitted in the illustrated embodiment. Figures 1 to 3 The features of the described embodiments may be compared with those of Figure 6 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0126] Figure 7 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0127] Reference Figure 7 , in the first dam 340, the first width W1 of the first layer 341, the second width W2 of the second layer 342, and the third width W3 of the third layer 343 are substantially the same. That is, the first dam 340 may be formed to have a substantially constant width from its lower layer to its upper layer. Figures 1 to 3 The features of the described embodiments may be compared with those of Figure 7 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0128] Figure 8 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0129] Reference Figure 8 , the first dam 340 includes a first layer 341 and a second layer 342, and a first width W1 of the first layer 341 and a second width W2 of the second layer 342 are substantially the same as each other. The first dam 340 is formed to have a substantially constant width from its lower layer to its upper layer. Figures 1 to 3The features of the described embodiments may be compared with those of Figure 8 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0130] In the following, reference will be made to Figures 9 to 15 Describe the Figures 1 to 3 An exemplary embodiment of a display device described in JP-A-2007-12747 further includes a second dam 350 .

[0131] Fig. 9 is a top plan view of a display device constructed according to the principles of the present disclosure.

[0132] Reference Fig. 9 The display device may further include a second dam 350 disposed between the first dam 340 and the display area DA, the first dam 340 being disposed in the peripheral area PA. The second dam 350 may prevent the overcoat material OC from flowing back to the display area DA after contacting the first dam 340 when the overcoat layer 330 is formed.

[0133] The second dam 350 may be disposed in the peripheral area PA and surround the display area DA along the peripheral area PA. The second dam 350 may be disposed in parallel with the first dam 340 at a predetermined interval. Fig. 9 , the second dam 350 is shown as one, but the second dam 350 may be formed as a plurality of dams.

[0134] The second dam 350 may include one to three layers, wherein one layer may include the same material as one of the first to third color filters, two layers may include the same material as two of the first to third color filters, and three layers may include the same material as the first to third color filters. The second dam 350 and the first dam 340 may be formed simultaneously with at least one color filter. The thickness of the second dam 350 is substantially equal to or less than the thickness of the first dam 340. Reference will be made to Figures 10 to 15 Describe this.

[0135] Fig.10 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0136] Reference Fig.10 , the first dam 340 includes a first layer 341 , a second layer 342 , and a third layer 343 , and the second dam 350 includes a first layer 351 , a second layer 352 , and a third layer 353 .

[0137] When forming the color filter 320, the first dam 340 and the second dam 350 are formed together. The first layer 341 of the first dam 340 and the first layer 351 of the second dam 350 are made of the same material as the first color filter. The second layer 342 of the first dam 340 and the second layer 352 of the second dam 350 are made of the same material as the second color filter. The third layer 343 of the first dam 340 and the third layer 353 of the second dam 350 are made of the same material as the third color filter. The second dam 350 can be formed so that its width gradually decreases from its lower layer to its upper layer. In contrast, the second dam 350 can be formed to have substantially the same width from its lower layer to its upper layer.

[0138] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.10 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0139] Fig.11 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0140] Reference Fig.11 , the second dam 350 is formed in plurality. The number of the second dam 350 is not limited. Fig.11 An exemplary embodiment is shown in which the second dam 350 includes a first sub-dam 350 - 1 and a second sub-dam 350 - 2 . The first sub-dam 350 - 1 includes a first layer 351 and a second layer 352 , and the second sub-dam 350 - 2 includes a first layer 354 and a second layer 355 .

[0141] The first layer 351 of the first sub-dam 350-1 may be made of the same material as one of the first to third color filters, and the second layer 352 of the first sub-dam 350-1 may be made of the same material as the other of the first to third color filters. The first layer 354 of the second sub-dam 350-2 may be made of the same material as one of the first to third color filters, and the second layer 355 of the second sub-dam 350-2 may be made of the same material as the other of the first to third color filters. In this case, the first layer 351 of the first sub-dam 350-1 and the first layer 354 of the second sub-dam 350-2 may be made of different color filter materials, and the second layer 352 of the first sub-dam 350-1 and the second layer 355 of the second sub-dam 350-2 may be made of different color filter materials. The first sub-dam 350-1 and the second sub-dam 350-2 may be formed so that their widths gradually decrease from their lower layers to their upper layers. In contrast, at least one of the first sub-dam 350 - 1 and the second sub-dam 350 - 2 may be formed to have the same width from a lower layer thereof to an upper layer thereof.

[0142] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.11 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0143] Fig.12 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0144] Reference Fig.12 , the second dam 350 includes a first sub-dam 350-1, a second sub-dam 350-2, and a third sub-dam 350-3. Each of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 includes one layer.

[0145] Each of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of the same material as one of the first to third color filters. At least two of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of the same color filter material. Alternatively, the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of different color filter materials. Each of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may have a size and / or thickness smaller than the first dam 340.

[0146] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.12 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0147] Fig.13 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0148] Reference Fig.13 , the first dam 340 includes a first layer 341 and a second layer 342 , and the second dam 350 includes a first layer 351 and a second layer 352 .

[0149] The first layer 341 of the first dam 340 may be made of the same material as one of the first to third color filters, and the second layer 342 of the first dam 340 may be made of the same material as the other of the first to third color filters. The first layer 351 of the second dam 350 may be made of the same material as one of the first to third color filters, and the second layer 352 of the second dam 350 may be made of the same material as the other of the first to third color filters.

[0150] The first layer 341 of the first dam 340 and the first layer 351 of the second dam 350 may be made of the same color filter material. In this case, the second layer 342 of the first dam 340 and the second layer 352 of the second dam 350 may be made of the same color filter material or different color filter materials.

[0151] Alternatively, the first layer 341 of the first dam 340 and the first layer 351 of the second dam 350 may be made of different color filter materials. In this case, the second layer 342 of the first dam 340 and the second layer 352 of the second dam 350 may be made of the same color filter material or different color filter materials.

[0152] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.13 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0153] Fig.14 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0154] Reference Fig.14 , the first dam 340 includes a first layer 341 and a second layer 342 , and the second dam 350 may include one layer.

[0155] The first layer 341 of the first dam 340 may be made of the same material as one of the first to third color filters, and the second layer 342 of the first dam 340 may be made of the same material as the other of the first to third color filters. The second dam 350 may be made of the same material as one of the first to third color filters.

[0156] The second dam 350 may be made of the same color filter material as the first layer 341 or the second layer 342 of the first dam 340. Alternatively, the second dam 350 may be made of a color filter material different from that of the first layer 341 and the second layer 342 of the first dam 340.

[0157] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.14 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0158] Fig.15 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0159] Reference Fig.15 , the first dam 340 may include one layer, the second dam 350 may include a plurality of sub-dams 350 - 1 , 350 - 2 , and 350 - 3 , and each of the sub-dams 350 - 1 , 350 - 2 , and 350 - 3 may include one layer.

[0160] The first dam 340 may be made of the same material as one of the first to third color filters. Each of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of the same material as one of the first to third color filters. At least two of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of the same color filter material. Optionally, the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of different color filter materials.

[0161] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.15 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0162] Fig.16is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0163] Reference Fig.16 , the second width W2 of the second layer 342 of the first dam 340 may be greater than the first width W1 of the first layer 341 of the first dam 340. Therefore, the first dam 340 may be formed such that the second layer 342 may cover and surround the first layer 341.

[0164] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.16 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0165] Fig.17 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0166] Fig.17 It shows Fig.16 The display device further includes the second dam 350. The width of the second layer 352 of the second dam 350 may be greater than the width of the first layer 351 of the second dam 350, and the second dam 350 may be formed such that the second layer 352 may cover and surround the first layer 351.

[0167] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.17 The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0168] Fig.18 is a cross-sectional view of a portion of a peripheral area and a portion of a display area of ​​still another exemplary embodiment of a display device.

[0169] Fig.18 It shows Fig.16 In the case where the display device further includes a second dam 350, the second dam 350 includes a plurality of sub-dams 350-1, 350-2, and 350-3. The first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 include one layer. Each of the first sub-dam 350-1, the second sub-dam 350-2, and the third sub-dam 350-3 may be made of the same material as one of the first to third color filters.

[0170] Apart from these differences, Figures 1 to 3 The features of the described embodiments may be compared with those of Fig.18The embodiments described are the same, so reference will be omitted Figures 1 to 3 The description of repeated features of the described embodiments is done to avoid redundancy.

[0171] Fig.19 is an experimental graph of light transmittance versus the concentration of the UV wavelength blocker in the outer coating. Fig. 20 is a graph of the transmittance of ultraviolet light relative to the concentration of the ultraviolet wavelength blocker of the outer coating.

[0172] exist Fig.19 In , the horizontal axis indicates the wavelength of light, and the vertical axis indicates the transmittance of light. Fig. 20 , the horizontal axis indicates the concentration of the ultraviolet wavelength blocker, and the vertical axis indicates the transmittance of light (ultraviolet rays) having a short wavelength of 405 nm.

[0173] As the concentration of the ultraviolet wavelength blocker increases, the transmittance of ultraviolet rays in the outer coating 330 decreases. For example, when the concentration of the ultraviolet wavelength blocker is 1.7%, the transmittance of ultraviolet rays at 405 nm is 6.71%, and when the concentration of the ultraviolet wavelength blocker is 2.4%, the transmittance of ultraviolet rays at 405 nm is 2.89%.

[0174] However, when the concentration of the ultraviolet wavelength blocker is 5% to 10%, the transmittance of the blue light emitted from the organic light emitting diode OLED is also reduced. It is suitable that the concentration of the ultraviolet wavelength blocker contained in the overcoat 330 is less than 5%. The concentration of the ultraviolet wavelength blocker contained in the overcoat 330 can be determined to be about 1.7% to 2.4%.

[0175] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but rather to the broader scope of the present disclosure and various obvious modifications and equivalent arrangements as will be apparent to those of ordinary skill in the art.

Claims

1. A display device, wherein: The display device comprises: A display layer having a display area including a plurality of pixel areas and a peripheral area at least partially surrounding the display area; and a covering layer, disposed on the display layer to encapsulate the display area, Wherein, the covering layer comprises: a light blocking portion overlapping the display area and the peripheral area and including a plurality of openings to transmit light from the plurality of pixel areas and to block light in the peripheral area; a first protrusion disposed on the light blocking portion in the peripheral area and surrounding the display area; and An overcoat layer covers the display area and contacts a side surface of the first protrusion.

2. The display device according to claim 1, wherein: The cover layer further includes a plurality of color filters disposed on the light blocking portion and overlapping the plurality of openings.

3. The display device according to claim 2, wherein: The plurality of color filters include a first color filter of a first color, a second color filter of a second color, and a third color filter of a third color, and The first to third color filters overlap different openings.

4. The display device according to claim 3, wherein: The first protrusion includes a first dam including a first layer made of the same material as the first color filter.

5. The display device according to claim 4, wherein: The display device further includes: a second dam disposed on the light blocking portion in the peripheral area and disposed between the first dam and the display area to surround the display area, The second dam includes a second layer, and the second layer includes a same material as that of one of the first to third color filters.

6. The display device according to claim 4, wherein: The first dam further includes a second layer disposed on the first layer, and the second layer includes the same material as the second color filter.

7. The display device according to claim 6, wherein: The second layer has a width equal to or smaller than a width of the first layer.

8. The display device according to claim 6, wherein: The display device further includes: a second dam disposed on the light blocking portion in the peripheral area and disposed between the first dam and the display area to surround the display area, The second dam includes one layer or two layers, wherein the one layer includes the same material as one of the first to third color filters, and the two layers include the same material as two of the first to third color filters.

9. The display device according to claim 6, wherein: The first dam further includes a third layer disposed on the second layer, and the third layer includes the same material as the third color filter, Wherein, the third layer has a width equal to or smaller than a width of the second layer.

10. The display device according to claim 9, wherein: The display device further includes: a second dam disposed on the light blocking portion in the peripheral area and disposed between the first dam and the display area to surround the display area, wherein the second dam comprises one layer, two layers or three layers, and wherein the one layer includes the same material as one of the first to third color filters, the two layers include the same material as two of the first to third color filters, and the three layers include the same material as the first to third color filters.

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