Display device

Abstract

A display device according to an embodiment of the present invention includes a display panel divided into a light-emitting region emitting light and a non-light-emitting region adjacent to the light-emitting region, and a cover layer disposed on the display panel, the cover layer including a first portion overlapping the non-light-emitting region and including a first dye, and a second portion overlapping the non-light-emitting region and including a second dye, and a light-emitting layer that overlaps the light-emitting region and includes a first substance in which at least a portion of the first dye is degraded.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a display device with improved display efficiency. Background Art

[0002] Various display devices are being developed for multimedia devices such as televisions, mobile phones, tablet computers, game consoles, etc. The display device may include various optical functional layers in order to provide users with excellent quality color images.

[0003] On the other hand, in order to realize various forms of display devices including curved display devices, rollable display devices, foldable display devices, etc., research on thin display devices is being conducted recently. Thin display devices can be realized by reducing the number of optical functional layers and including optical functional layers with various functions. Summary of the invention

[0004] An object of the present invention is to provide a display device which reduces external light reflection, improves display efficiency and enhances optical characteristics.

[0005] A display device according to an embodiment of the present invention includes: a display panel, divided into a light-emitting area that emits light and a non-light-emitting area adjacent to the light-emitting area, and a covering layer, arranged on the display panel, the covering layer including: a first part, overlapping the non-light-emitting area and including a first dye, and a second part, overlapping the light-emitting area and including a first substance formed by degradation of at least a portion of the first dye.

[0006] The first substance may be a substance obtained by photodegradation of at least a portion of the first dye by ultraviolet light.

[0007] The first dye may include a chromophore, and the first substance may be a substance in which at least a part of the chromophore is destroyed by the ultraviolet rays.

[0008] The absorbance of the first portion to visible light may be higher than the absorbance of the second portion to the visible light.

[0009] The weight percentage of the first dye relative to the entire weight of the first part may be 0.1 wt % or more and 5 wt % or less.

[0010] The absorption wavelength range of the first dye may be greater than 530 nm and less than 600 nm.

[0011] It can be that the first dye includes at least one selected from the group consisting of anthraquinone compounds, phthalocyanine compounds, azo compounds, perylene compounds, xanthene compounds, diimmonium compounds, dipyrromethene compounds, tetraazaporphyrin compounds, porphyrin compounds, squarylium compounds, oxazine compounds, triarylmethane compounds and cyanine compounds.

[0012] The thickness of the cover layer may be greater than 1 micrometer and less than 15 micrometers.

[0013] The covering layer may further include a pigment, and a weight percentage of the pigment relative to the entire weight of the covering layer is greater than or equal to 1 wt % and less than or equal to 50 wt %.

[0014] Alternatively, the display device may further include an ultraviolet blocking layer disposed on the cover layer and overlapping the non-luminescent region.

[0015] The ultraviolet blocking layer may include a light absorber or a light stabilizer for ultraviolet light.

[0016] It may be that the display panel includes: a light emitting element that emits a first color light, the light emitting area includes a first light emitting area that emits a second color light different from the first color light, a second light emitting area that emits a third color light different from the first color light and the second color light, and a third light emitting area that transmits the first color light.

[0017] It may be that the display device also includes: a light control layer, arranged between the display panel and the covering layer, the light control layer includes: a first light control unit, overlapping the first light emitting area and converting the first color light into the second color light; and a second light control unit, overlapping the second light emitting area and converting the first color light into the third color light.

[0018] It may be that the display device also includes: a color filter layer, arranged between the display panel and the light control layer, the color filter layer including: a first filter, overlapping the first light emitting area, and blocking the first color light and the third color light; a second filter, overlapping the second light emitting area, and blocking the first color light and the second color light, and a third filter, overlapping the third light emitting area, and blocking the second color light and the third color light.

[0019] The third filter may entirely overlap the non-luminous region.

[0020] It may be that the first filter and the second filter do not overlap in a plane.

[0021] The display device may further include: a low refractive layer disposed between the light control layer and the color filter layer, and an anti-reflection layer disposed on the color filter layer.

[0022] A display device according to one embodiment includes: a display panel, divided into a light-emitting area that emits light and a non-light-emitting area adjacent to the light-emitting area, and a covering layer, which is configured on the display panel and includes a first portion overlapping the non-light-emitting area and a second portion overlapping the light-emitting area, the covering layer including a first dye, and a weight percentage of the first dye relative to the overall weight of the first portion is higher than a weight percentage of the first dye relative to the overall weight of the second portion.

[0023] It may be that the weight percentage of the first dye relative to the entire weight of the second part is 0.01 wt % or less.

[0024] According to the display device of an embodiment of the present invention, the material included in the cover layer is different according to the pixel area and the non-pixel area. Therefore, the light efficiency of the display device including the cover layer according to an embodiment of the present invention can be improved and external light reflection can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view showing a display device according to an embodiment.

[0026] Figure 2 is a plan view showing a portion of a display device according to an embodiment.

[0027] Figure 3 is a cross-sectional view of a display device according to an embodiment.

[0028] Figure 4 is a cross-sectional view enlarging a portion of a display device according to an embodiment.

[0029] Figure 5a to Figure 5c is a cross-sectional view of a display device according to an embodiment.

[0030] Figure 6a as well as Figure 6b The following are diagrams sequentially showing some steps in a method for manufacturing a display device according to an embodiment.

[0031] Figure 7a as well as Figure 7b is a cross-sectional view of a display device according to a comparative example.

[0032] Figure 8 : is a graph which shows the light transmittance value of Example and Comparative Example 1.

[0033] Fig. 9 It is a graph showing the color coordinates of Example and Comparative Example 2.

[0034] (Explanation of Reference Numerals)

[0035] DD: Display device DP: Display panel

[0036] OC: Cover layer O1, O2: first and second parts

[0037] PXA: luminous area NPXA: non-luminous area

[0038] LR: Low refractive layer AR: Anti-reflection layer

[0039] UL: UV blocking layer DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0041] In this specification, when it is mentioned that a certain constituent element (or region, layer, part, etc.) is "on" other constituent elements, "connected to" or "combined to" other constituent elements, it means that the certain constituent element can be directly connected / combined to other constituent elements or a third constituent element can be arranged between them.

[0042] The same reference numerals refer to the same components. In addition, in the drawings, the thickness, proportion and size of the components are exaggerated for the effective description of the technical content. "And / or" includes all combinations that can be defined by the associated components.

[0043] The terms first, second, etc. may be used to describe various constituent elements, but the constituent elements are not limited by the terms. The terms are only used to distinguish one constituent element from other constituent elements. For example, without departing from the scope of the present invention, the first constituent element may be named as the second constituent element, and similarly, the second constituent element may be named as the first constituent element. Singular expressions include plural expressions unless otherwise expressly indicated in the context.

[0044] In addition, terms such as “below”, “lower side”, “above”, and “upper side” are used to explain the relationship between components shown in the drawings. These terms are relative concepts and are explained based on the directions shown in the drawings.

[0045] The terms "including" or "having" should be understood as being used to specify the existence of the features, numbers, steps, tasks, constituent elements, parts or their combinations recorded in the specification, and do not preclude the existence or additional possibilities of one or more other features or numbers, steps, tasks, constituent elements, parts or their combinations.

[0046] In this specification, "direct configuration" may mean that there is no additional layer, film, region, plate, etc. between a layer, film, region, plate, etc. and another part. For example, "direct configuration" may mean that no additional accessories such as bonding parts are used between two layers or two parts.

[0047] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this specification have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. In addition, terms such as terms defined in commonly used dictionaries should be interpreted as having the same meanings as those in the context of the relevant technology, and should not be interpreted as too idealistic or too formalistic unless explicitly defined herein.

[0048] Hereinafter, a display device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0049] Figure 1 is a perspective view showing a display device according to an embodiment.

[0050] The display device DD of an embodiment may be a device activated by an electrical signal. For example, the display device DD may be a television, an outdoor billboard, a portable electronic device, a tablet, a car navigation system, a game console, a personal computer, a notebook computer, or a wearable device, but is not limited thereto.

[0051] The display device DD may display an image (or video) through a display surface DD-IS. The display surface DD-IS may be parallel to a plane defined by the first direction axis DR1 and the second direction axis DR2. The display surface DD-IS may include a display area DA and a non-display area NDA.

[0052] It may be that the display area DA is configured with pixels PX, and the non-display area NDA is not configured with pixels PX. The non-display area NDA may be defined along the edge of the display surface DD-IS. The non-display area NDA may surround the display area DA. However, the embodiment is not limited thereto, and the non-display area NDA may be omitted, or the non-display area NDA may be configured only on one side of the display area DA.

[0053] exist Figure 1 , a display device DD having a flat display surface DD-IS is shown, but the present invention is not limited thereto. The display device DD may also include a curved display surface or a three-dimensional display surface. The three-dimensional display surface may also include a plurality of display areas indicating different directions from each other.

[0054] The thickness direction of the display device DD may be a normal direction to a plane defined by the first direction axis DR1 and the second direction axis DR2, that is, a direction parallel to the third direction axis DR3. The directions indicated by the first to third direction axes DR1, DR2, and DR3 described in this specification are relative concepts and may be converted to other directions. In addition, the directions indicated by the first to third direction axes DR1, DR2, and DR3 may be described by the first to third directions, and the same reference numerals may be used.

[0055] In the present specification, the top (or front) and bottom (or back) of the components constituting the display device DD may be defined based on the third directional axis DR3. More specifically, in one component, the surface relatively adjacent to the display surface DD-IS among the two surfaces facing each other based on the third directional axis DR3 may be defined as the front (or top), and the surface relatively separated from the display surface DD-IS may be defined as the back (or bottom). In addition, in the present specification, the top and the bottom may be defined based on the third directional axis DR3, the top may be defined as the direction approaching the display surface DD-IS, and the bottom may be defined as the direction away from the display surface DD-IS.

[0056] Figure 2 FIG. 1 is a plan view showing an enlarged portion of a display device DD according to an embodiment. Figure 2 exemplarily shows a plane including three light emitting regions PXA-R, PXA-B, PXA-G and a dam well region BWA adjacent thereto. Figure 2 The three light-emitting regions PXA-R, PXA-B, and PXA-G shown in FIG. 1 are corresponding to the pixel PX ( Figure 1) area, can be repeatedly configured in the display area DA( Figure 1 )overall.

[0057] A non-luminous region NPXA may be arranged around the first to third luminous regions PXA-R, PXA-B, and PXA-G. The non-luminous region NPXA may set the boundaries of the first to third luminous regions PXA-R, PXA-B, and PXA-G. The non-luminous region NPXA may surround the first to third luminous regions PXA-R, PXA-B, and PXA-G. A structure that prevents color mixing of the first to third luminous regions PXA-R, PXA-B, and PXA-G may be arranged in the non-luminous region NPXA, for example, a pixel defining film PDL ( Figure 3 )wait.

[0058] exist Figure 2 It is shown that the first to third light-emitting regions PXA-R, PXA-B, and PXA-G have the same shape on a plane and have different areas on a plane, but the embodiment is not limited thereto. The areas of at least two of the first to third light-emitting regions PXA-R, PXA-B, and PXA-G may also be the same. The areas of the first to third light-emitting regions PXA-R, PXA-B, and PXA-G may be set according to the hue of the emitted light. It may be that, in the primary hue, the area of ​​the light-emitting region emitting red light is the widest, and the area of ​​the light-emitting region emitting blue light is the narrowest.

[0059] exist Figure 2 , each of the first to third light emitting regions PXA-R, PXA-B, and PXA-G is shown as a rectangular shape on a plane. Different from this, each of the first to third light emitting regions PXA-R, PXA-B, and PXA-G may be a polygonal shape of other shapes such as a rhombus or a pentagon. In addition, each corner area of ​​the first to third light emitting regions PXA-R, PXA-B, and PXA-G may have a rounded rectangular shape.

[0060] exist Figure 2 2 shows that the second light emitting region PXA-G is arranged in the first row, and the first light emitting region PXA-R and the third light emitting region PXA-B are arranged in the second row. However, this is exemplary, and the arrangement of the first to third light emitting regions PXA-R, PXA-B, and PXA-G can be changed in various ways. For example, the first to third light emitting regions PXA-R, PXA-B, and PXA-G can be arranged in the same row.

[0061] It may be that any one of the first to third light emitting regions PXA-R, PXA-B, and PXA-G emits a first color light, another emits a second color light different from the first color light, and the remaining another emits a third color light different from the first color light and the second color light. For example, it may be that the first light emitting region PXA-R emits red light, the second light emitting region PXA-G emits green light, and the third light emitting region PXA-B emits blue light.

[0062] In the display area DA( Figure 1 ) can define a dam well area BWA. The dam well area BWA can be to prevent the light control layer CCL ( Figure 3 The dam well area BWA may be a region formed by a defect caused by a misfire in the process of forming the plurality of light control units CCP1, CCP2, and CCP3 in FIG. Figure 3 ) is a part of the area. Figure 2 2 shows that two bank well regions BWA are formed adjacent to the second light emitting region PXA-G, but the embodiment is not limited thereto, and the shape and arrangement of the bank well region BWA may be variously changed.

[0063] Figure 3 is a cross-sectional view of a display device according to an embodiment. Figure 3 is shown corresponding to Figure 2 A cross-sectional view of the portion along the line I-I'. Figure 4 FIG. 1 is an enlarged view of a part of a cross section of a color filter layer according to an embodiment of the present invention. Figure 4 is an enlarged view corresponding to Figure 3 The cross section of the AA' region.

[0064] Reference Figure 3 The display device DD may include a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, a light emitting element layer DP-LED disposed on the circuit layer DP-CL, a light control layer CCL disposed on the light emitting element layer DP-LED, and a color filter layer CFL disposed on the light control layer CCL. The display panel DP may include the light emitting element layer DP-LED and the circuit layer DP-CL.

[0065] The base substrate BS may be a component that provides a base surface for configuring the circuit layer DP-CL. The base substrate BS may include a single layer or multiple layers. For example, the base substrate BS may include a three-layer structure of a polymer resin layer, an adhesive layer, and a polymer resin layer. For example, the polymer resin layer may include a polyimide resin. In addition, the polymer resin layer may include at least one of an acrylate resin, a methacrylate resin, a polyisoprene resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a siloxane resin, a polyamide resin, and a perylene resin.

[0066] In this specification, polyimide resin means a functional group containing polyimide. In addition, the same description can also be applied to acrylate resin, methacrylate resin, polyisoprene resin, vinyl resin, epoxy resin, urethane resin, cellulose resin, siloxane resin, polyamide resin, and perylene resin.

[0067] The circuit layer DP-CL may include a lower buffer layer BRL disposed on the base substrate BS, a first insulating layer 10 disposed on the lower buffer layer BRL, a second insulating layer 20 disposed on the first insulating layer 10, and a third insulating layer 30 disposed on the second insulating layer 20. For example, the lower buffer layer BRL, the first insulating layer 10, and the second insulating layer 20 may be inorganic layers, and the third insulating layer 30 may be an organic layer.

[0068] In addition, the circuit layer DP-CL may include a transistor TD. The transistor TD may include an active AD, a source SD, a drain DD, and a gate GD. The active AD, the source SD, the drain DD, and the gate GD may be regions divided according to the doping concentration or conductivity of the semiconductor pattern. It may be that the active AD, the source SD, and the drain DD are arranged above the lower buffer layer BRL, and the gate GD is arranged above the first insulating layer 10. For example, the transistor TD may be a switching transistor or a driving transistor for driving the light emitting element OLED of the light emitting element layer DP-LED. However, this is exemplary, and the transistor TD is not limited thereto.

[0069] The light-emitting element layer DP-LED may include a pixel defining film PDL defining a pixel opening OH and a light-emitting element OLED. The light-emitting element OLED may include a first electrode AE ​​exposed in the pixel opening OH, a second electrode CE facing the first electrode AE, and a light-emitting layer EML disposed between the first electrode AE ​​and the second electrode CE. The light-emitting element OLED may also include a hole transport region HCL disposed between the first electrode AE ​​and the light-emitting layer EML and an electron transport region ECL disposed between the light-emitting layer EML and the second electrode CE. The hole transport region may include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer. The electron transport region may include at least one of an electron injection layer, an electron transport layer, and a hole blocking layer.

[0070] The first electrode AE ​​may be an anode or a cathode. In addition, the first electrode AE ​​may be a pixel electrode. The first electrode AE ​​may be a transmissive electrode, a semi-transmissive electrode or a reflective electrode. The second electrode CE may be a common electrode. The second electrode CE may be a cathode or an anode, but the embodiment is not limited thereto. For example, when the first electrode AE ​​is an anode, the second electrode CE may be a cathode, and when the first electrode AE ​​is a cathode, the second electrode CE may be an anode. The second electrode CE may be a transmissive electrode, a semi-transmissive electrode or a reflective electrode.

[0071] The light emitting layer EML may emit a first color light. For example, the light emitting layer EML may generate blue light. The light emitting layer EML may generate light in a wavelength region of greater than 410 nm and less than 480 nm. Figure 3 , a light-emitting element OLED including one light-emitting layer EML is shown, but the light-emitting element OLED may include a plurality of light-emitting layers. That is, the light-emitting element OLED may be a light-emitting element of a tandem structure.

[0072] The light emitting layer EML may include a fluorescent or phosphorescent substance. For example, the light emitting layer EML may include an anthracene derivative, a pyrene derivative, a fluoranthene derivative, In addition, the light emitting layer EML may also include a metal organic complex as a light emitting material.

[0073] exist Figure 3 , the light emitting layer EML is provided as a common layer and overlaps the light emitting regions PXA-R, PXA-G, PXA-B and the non-light emitting region NPXA, but the embodiment is not limited thereto. The light emitting layer EML may also be patterned in the pixel opening OH and provided to overlap each of the light emitting regions PXA-R, PXA-G, PXA-B, and not overlap the non-light emitting region NPXA.

[0074] The pixel opening OH of the pixel defining film PDL may expose at least a portion of the first electrode AE. The pixel defining film PDL overlaps the non-luminescent area NPXA and does not overlap the luminescent areas PXA-R, PXA-G, and PXA-B. The pixel defining film PDL may include organic matter. For example, the pixel defining film PDL may be optically transparent. The transmittance of the pixel defining film PDL for light in a wavelength region of 380 nm or more and 780 nm or less may be about 85% or more.

[0075] On the other hand, in this specification, the situation where two structures "overlap" is not limited to having the same area and the same shape on a plane, but also includes the situation where the two structures have different areas and / or different shapes. The plane refers to a plane perpendicular to the thickness direction.

[0076] The light emitting element layer DP-LED may include a thin film encapsulation layer TFE that protects the second electrode CE. The thin film encapsulation layer TFE may include an organic substance or an inorganic substance. The thin film encapsulation layer TFE may have a multilayer structure of repeated inorganic layer / organic layer. In the present embodiment, the thin film encapsulation layer TFE may include a first encapsulation inorganic layer IOL1 / encapsulation organic layer OL / second encapsulation inorganic layer IOL2. It can be that the first and second encapsulation inorganic layers IOL1 / IOL2 protect the light emitting element OLED from external moisture, and the encapsulation organic layer OL can prevent poor imprinting of the light emitting element OLED due to inflow of foreign matter during the manufacturing process. Although not shown in the figure, the display panel DP may also include a refractive index control layer on the upper side of the thin film encapsulation layer TFE for improving the light extraction efficiency.

[0077] The light control layer CCL may be disposed on the light emitting element layer DP-LED. The light control layer CCL may include a light converter. The light converter may be a quantum dot or a phosphor, etc. The light converter may convert the received light into light by wavelength conversion. That is, the light control layer CCL may be a layer including quantum dots or a layer including a phosphor.

[0078] The light control layer CCL may include a plurality of light control parts CCP1, CCP2, and CCP3. The light control parts CCP1, CCP2, and CCP3 may be separated from each other. The light control layer CCL may include a first light control part CCP1 that converts a first color light provided by the light emitting element OLED into a second color light, a second light control part CCP2 that converts the first color light into a third color light, and a third light control part CCP3 that transmits the first color light.

[0079] The light control layer CCL may include a bank BK disposed between the light control parts CCP1, CCP2, and CCP3 that are separated from each other. Figure 3Although the bank BK is not overlapped with the light control parts CCP1 , CCP2 , and CCP3 , the edges of the light control parts CCP1 , CCP2 , and CCP3 may overlap with at least a portion of the bank BK.

[0080] The dam BK may include a base resin and an additive. The base resin may generally be composed of various resin compositions that may be referred to as adhesives. The additive may include a coupling agent and / or a photoinitiator. The additive may also include a dispersant.

[0081] The bank BK may include a black coloring agent for light blocking. The bank BK may include a black dye or a black pigment mixed with a base resin. In one embodiment, the black coloring agent may include carbon black, or a metal such as chromium or an oxide thereof.

[0082] The light control layer CCL may include a blocking layer BFL1. The blocking layer BFL1 may play a role in blocking the penetration of moisture and / or oxygen (hereinafter referred to as "moisture / oxygen"). The blocking layer BFL1 may be arranged on the light control parts CCP1, CCP2, CCP3 to block the light control parts CCP1, CCP2, CCP3 from being exposed to moisture / oxygen. On the other hand, the blocking layer BFL1 may cover the light control parts CCP1, CCP2, CCP3. In addition, a blocking layer BFL2 may also be provided between the light control parts CCP1, CCP2, CCP3 and the filters CF1, CF2, CF3.

[0083] The barrier layers BFL1 and BFL2 may include at least one inorganic layer. That is, the barrier layers BFL1 and BFL2 may be composed of inorganic substances. For example, the barrier layers BFL1 and BFL2 may be composed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride or a metal film that ensures light transmittance. On the other hand, the barrier layers BFL1 and BFL2 may also include an organic film. The barrier layers BFL1 and BFL2 may be composed of a single layer or a plurality of layers.

[0084] In a display device DD of an embodiment, the color filter layer CFL may be disposed on the light control layer CCL. For example, the color filter layer CFL may be directly disposed on the light control layer CCL. In this case, the blocking layer BFL2 may be omitted.

[0085] The color filter layer CFL may include filters CF1, CF2, CF3 and a cover layer OC covering the filters CF1, CF2, CF3.

[0086] The color filter layer CFL may include a first filter CF1 transmitting a second color light, a second filter CF2 transmitting a third color light, and a third filter CF3 transmitting the first color light. For example, the first filter CF1 may be a red filter, the second filter CF2 may be a green filter, and the third filter CF3 may be a blue filter. Each of the filters CF1, CF2, and CF3 may include a polymer photosensitive resin and a pigment or dye. The first filter CF1 may include a red pigment or dye, the second filter CF2 may include a green pigment or dye, and the third filter CF3 may include a blue pigment or dye. However, the embodiment is not limited thereto, and the third filter CF3 may not include a pigment or dye. The third filter CF3 may include a polymer photosensitive resin and not include a pigment or dye. The third filter CF3 may be transparent. The third filter CF3 may be formed of a transparent photosensitive resin. For example, a portion of the third filter CF3 may also include a blue pigment or dye, and another portion may be formed of a transparent photosensitive resin.

[0087] Each of the first to third filters CF1, CF2, and CF3 may be configured on the same layer by corresponding to each of the first light emitting area PXA-R, the second light emitting area PXA-G, and the third light emitting area PXA-B. Each of the first to third filters CF1, CF2, and CF3 may have substantially the same height from the top of the light control layer CCL in each of the first light emitting area PXA-R, the second light emitting area PXA-G, and the third light emitting area PXA-B in the third direction DR3. However, the embodiment is not limited thereto, and the same as in Figure 3 The difference shown in the figure may be that each of the first and second filters CF1 and CF2 has substantially the same height in the first light emitting area PXA-R and the second light emitting area PXA-G, and the third filter CF3 has a height different from that of the first and second filters CF1 and CF2 in the third light emitting area PXA-B. For example, the height of the third filter CF3 overlapping the third light emitting area PXA-B may be relatively lower than the height of the first and second filters CF1 and CF2 overlapping each of the first light emitting area PXA-R and the second light emitting area PXA-G. Alternatively, the upper surface of the portion of the third filter CF3 overlapping the third light emitting area PXA-B is arranged in parallel with the upper surface of the portion of the third filter CF3 overlapping the non-light emitting area NPXA, so that the third filter CF3 may also have substantially the same height relative to the light emitting area PXA-B and the non-light emitting area NPXA.

[0088] Each of the first to third filters CF1, CF2, and CF3 may be configured to overlap at least a portion of the non-luminous area NPXA. For example, the first and second filters CF1 and CF2 may be configured to overlap a portion of the non-luminous area NPXA, and the third filter CF3 may be configured to overlap the entire surface of the non-luminous area NPXA. The first and second filters CF1 and CF2 may not overlap on a plane. The first filter CF1 may be configured to overlap the boundary of the second filter CF2 on a plane, and the second filter CF2 may be configured to overlap the boundary of the first filter CF1 on a plane. However, the configuration of the embodiment is not limited thereto, and the same as in Figure 3 Different from that shown in FIG, the boundary of the first filter CF1 and the boundary of the second filter CF2 may not overlap and be separated in the plane. The third filter CF3 may be arranged on the first and second filters CF1 and CF2 in the non-luminous area NPXA. For example, the first filter CF1 and / or the second filter CF2 may be arranged on the light control layer CCL in a manner overlapping the non-luminous area NPXA, and the third filter CF3 may be arranged on the first filter CF1 and / or the second filter CF2 in a manner overlapping the non-luminous area NPXA.

[0089] On the other hand, although not shown, the color filter layer CFL may include a light shielding portion (not shown). The color filter layer CFL may include a light shielding portion (not shown) configured to overlap the boundaries of adjacent filters CF1, CF2, and CF3. It may be that the light shielding portion (not shown) is configured to correspond to the non-luminous area NPXA, and each of the first to third filters CF1, CF2, and CF3 is configured to correspond to each of the first luminous area PXA-R, the second luminous area PXA-G, and the third luminous area PXA-B. The light shielding portions (not shown) may be configured to be separated from each other. The light shielding portion (not shown) may be a black matrix to prevent light leakage. The light shielding portion (not shown) may be formed by an organic light shielding material including a black pigment or a black dye or an inorganic light shielding material. The light shielding portion (not shown) may divide the boundaries between adjacent filters CF1, CF2, and CF3. Alternatively, in one embodiment, the light shielding portion (not shown) may be formed by a blue filter.

[0090] The cover layer OC may cover the front surface of the display panel DP to protect the display panel DP. The thickness of the cover layer OC may be greater than 1 micrometer and less than 15 micrometers. The cover layer OC may be an organic layer that protects the filters CF1, CF2, and CF3. The cover layer OC may include a photocurable organic substance or a thermosetting organic substance. However, it is not limited thereto, and the cover layer OC may also include an inorganic substance.

[0091] The cover layer OC may have a high light absorption rate in a specific wavelength range. The cover layer OC may include a pigment or dye having a high light absorption rate in a specific wavelength range. When the cover layer OC includes a pigment, the cover layer OC may include more than 1 wt % and less than 50 wt % of the pigment based on the overall weight of the cover layer OC.

[0092] The cover layer OC may overlap the entire surface of the light emitting element layer DP-LED and may include a first portion O1 overlapping the non-light emitting area NPXA and a second portion O2 overlapping the light emitting areas PXA-R, PXA-G, and PXA-B.

[0093] The first part O1 includes a first dye. The first dye may have a high light absorption rate in a specific wavelength range. The first dye may be an organic substance having a high light absorption rate in at least one visible light wavelength range. The first dye may include a chromophore that absorbs light in a specific visible light wavelength range. The first dye may be a substance that absorbs light with a maximum absorption wavelength in a wavelength range other than the wavelength ranges of the first color light, the second color light, and the third color light. For example, the first dye may be a substance that absorbs light with a maximum absorption wavelength in a wavelength range other than the wavelength range of the first color light. In one embodiment, the first dye may have a maximum absorption wavelength in a wavelength range of more than 530nm and less than 600nm. For example, the first dye may have a maximum absorption wavelength in a wavelength range of more than 585nm and less than 600nm. The first dye may be a substance that absorbs light in a wavelength range of more than 585nm and less than 600nm and transmits the remaining light. However, the maximum absorption wavelength of the first dye is not limited to the above wavelength range and may have various values ​​as needed. Or in one embodiment, the first portion O1 may further include a first dye that absorbs light in a wavelength range of 585 nm to 600 nm, and include a second dye that has a maximum absorption wavelength in a wavelength range of 490 nm to 600 nm and is different from the first dye, etc. As the dye included in the first portion O1 absorbs a specific wavelength and transmits light in the remaining wavelength regions, reflection due to external light can be prevented and the color sense of light emitted from the display panel DP can be adjusted.

[0094] For example, the first dye included in the first part O1 may include at least one selected from the group consisting of anthraquinone compounds, phthalocyanine compounds, azo compounds, perylene compounds, xanthene compounds, diimmonium compounds, dipyrromethene compounds, tetraazaporphyrin compounds, porphyrin compounds, squarylium compounds, oxazine compounds, triarylmethane compounds, and cyanine compounds. For example, the first part O1 may include any one of tetraazaporphyrin compounds, cyanine compounds, squarylium compounds, and oxazine compounds, or a combination thereof.

[0095] The first part O1 may include more than 0.01wt% and less than 5.00wt% of the first dye based on the total weight of the first part O1. For example, the first part O1 may include more than 0.1wt% and less than 5.00wt% of the first dye based on the total weight of the first part O1. When the first part O1 includes less than 0.01wt% of the first dye, light in a specific wavelength region cannot be fully absorbed and the color reproduction rate cannot be improved. When the first part O1 includes more than 5.00wt% of the first dye, aggregation of the first dye may occur.

[0096] The second part O2 may include the first dye. The amount of the first dye included in the second part O2 may be relatively less than the amount of the first dye included in the first part O1. Based on the overall weight of the second part O2, the second part O2 may include more than 0.00wt% and less than 0.01wt% of the first dye. The second part O2 may not include the first dye.

[0097] The second part O2 includes a first substance formed by degradation of at least a portion of the first dye. The first substance may be an organic substance formed by photodegradation of at least a portion of the first dye by ultraviolet light. The first substance may be an organic substance having a structure formed by destruction of at least a portion of the chromophore contained in the first dye by ultraviolet light. Thus, the first substance may be a substance having a relatively reduced light absorption capacity for visible light compared to the first dye. That is, the absorbance of the second part O2 including the first substance to visible light may be relatively low compared to the absorbance of the first part O1 including the first dye to visible light. As the absorbance of the second part O2 is relatively low compared to the absorbance of the first part O1, the display device DD according to an embodiment may achieve an effect of increasing the display efficiency of the light emitted from the display panel DP for the user to identify.

[0098] Figure 5a to Figure 5c are cross-sectional views of display devices according to different embodiments. Figure 5a to Figure 5c A more detailed description will be given of one constituent element in the display device DD, while the same reference numerals are given to the same structures as those described above, and detailed description will be omitted.

[0099] Reference Figure 5a The light control layer CCL may include a first light control part CCP1 including first quantum dots QD1 that convert the first color light provided from the light emitting element OLED into second color light, a second light control part CCP2 including second quantum dots QD2 that convert the first color light into third color light, and a third light control part CCP3 that transmits the first color light.

[0100] In one embodiment, the first light control unit CCP1 may provide the second color light, i.e., red light, and the second light control unit CCP2 may provide the third color light, i.e., green light. The third light control unit CCP3 may provide the first color light, i.e., blue light, provided by the light emitting element OLED through transmission. For example, the first quantum dot QD1 may be a red quantum dot, and the second quantum dot QD2 may be a green quantum dot.

[0101] Quantum dots QD1 and QD2 can have a core-shell structure, and the core of quantum dots QD1 and QD2 can be selected from II-VI group compounds, III-VI group compounds, I-III-VI group compounds, III-V group compounds, IV-VI group compounds, IV group elements, IV group compounds and combinations thereof.

[0102] The II-VI compound can be selected from a binary compound selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; a binary compound selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, Cd A ternary compound selected from the group consisting of HgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and a mixture thereof, and a quaternary compound selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and a mixture thereof.

[0103] The III-VI compounds may include In 2 S 3 、In 2 Se 3 Binary compounds such as InGaS 3 、InGaSe 3 Ternary compounds or any combination thereof.

[0104] The I-III-VI group compound can be selected from AgInS, AgInS 2 、CuInS、CuInS 2 、AgGaS 2 、CuGaS 2 、CuGaO 2 、AgGaO 2 、AgAlO 2 And mixtures thereof consisting of ternary compounds or AgInGaS 2 、CuInGaS 2 Select from quaternary compounds.

[0105] The III-V compound may be selected from the group consisting of a binary compound selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof, a ternary compound selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb and mixtures thereof, and a quaternary compound selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof. On the other hand, the III-V compound may also include a Group II metal. For example, InZnP or the like can be selected as the III-II-V group compound.

[0106] The IV-VI group compound can be selected from the group consisting of a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof, a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof, and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof. The IV group element can be selected from the group consisting of Si, Ge and mixtures thereof. The IV group compound can be a binary compound selected from the group consisting of SiC, SiGe and mixtures thereof.

[0107] At this time, the binary compound, ternary compound or quaternary compound can be present in the particle at a uniform concentration, or the concentration distribution can be partially divided into different states and present in the same particle. In addition, there can be a core-shell structure in which one quantum dot surrounds another quantum dot. In the core-shell structure, the concentration of the element present in the shell can have a concentration gradient (gradient) that is lower the closer to the core.

[0108] In some embodiments, the quantum dot may have a core including the aforementioned nanocrystal core and a core-shell structure including a shell surrounding the core. The shell of the quantum dot may perform a protective layer function for preventing the chemical denaturation of the core and maintaining the semiconductor properties and / or a charging layer function for imparting electrophoretic properties to the quantum dot. The shell may be a single layer or a multilayer. As examples of the shell of the quantum dot, metal or non-metal oxides, semiconductor compounds, or combinations thereof may be cited.

[0109] For example, the metal or non-metal oxide can be exemplified by 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 , NiO and other binary compounds or MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 、CoMn 2 O 4 etc., but the present invention is not limited thereto.

[0110] In addition, the semiconductor compound can be exemplified by CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but the present invention is not limited thereto.

[0111] The quantum dots QD1 and QD2 may have a full width of half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, and the color purity or color reproducibility may be improved within this range. In addition, the light emitted by such quantum dots QD1 and QD2 may be emitted in all directions, thereby improving the wide viewing angle.

[0112] In addition, the form of quantum dots QD1 and QD2 is not particularly limited to the form commonly used in this field. More specifically, spherical, pyramidal, multi-arm or cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoplate particles and the like can be used.

[0113] The size of quantum dots QD1 and QD2 can be adjusted or the element ratio in the quantum dots QD1 and QD2 compounds can be adjusted, and thus various luminescent colors such as blue, red, and green can be obtained. Specifically, the size of quantum dots QD1 and QD2 or the adjustment of the element ratio in the quantum dots QD1 and QD2 compounds can be selected to emit red, green, and / or blue light. In one embodiment, the quantum dot QD1 included in the first light control unit CCP1 overlapping the first light emitting area PXA-R has a red luminescent color, and the quantum dot QD2 included in the second light control unit CCP2 overlapping the second light emitting area PXA-G has a green luminescent color. The particles of quantum dots QD1 and QD2 can be particles that emit light in a short wavelength region as the particle size is smaller. For example, the particle size of quantum dots that emit green light in quantum dots QD1 and QD2 having the same core can be smaller than the particle size of quantum dots that emit red light. In addition, the particle size of quantum dots that emit blue light in quantum dots QD1 and QD2 having the same core can be smaller than the particle size of quantum dots that emit green light. However, the embodiment is not limited thereto, and the particle size of the quantum dots QD1 and QD2 having the same core may also be adjusted according to the shell forming material and shell thickness, etc.

[0114] On the other hand, when the quantum dots QD1 and QD2 have various luminescent colors such as blue, red, and green, the materials of the cores of the quantum dots QD1 and QD2 having different luminescent colors may be different from each other.

[0115] In addition, the light control layer CCL may further include a scatterer SP. The first light control part CCP1 may include first quantum dots QD1 and scatterers SP, the second light control part CCP2 may include second quantum dots QD2 and scatterers SP, and the third light control part CCP3 may include no quantum dots and a scatterer SP.

[0116] The scatterer SP may be inorganic particles. For example, the scatterer SP may include TiO 2 、ZnO、Al 2 O 3 、SiO 2 and at least one of hollow silica. The scatterer SP may include TiO 2 、ZnO、Al 2 O 3 、SiO 2and any of the hollow silica, or in TiO 2 、ZnO、Al 2 O 3 、SiO 2 And a mixture of two or more substances selected from the hollow silica.

[0117] Each of the first light control unit CCP1, the second light control unit CCP2 and the third light control unit CCP3 may include a base resin BR1, BR2, BR3 of dispersed quantum dots QD1, QD2 and a scatterer SP. In one embodiment, the first light control unit CCP1 may include the first quantum dots QD1 and the scatterer SP dispersed in the first base resin BR1, the second light control unit CCP2 may include the second quantum dots QD2 and the scatterer SP dispersed in the second base resin BR2, and the third light control unit CCP3 may include the scatterer SP dispersed in the third base resin BR3. The base resins BR1, BR2, BR3, as the medium for the dispersed quantum dots QD1, QD2 and the scatterer SP, may be composed of various resin compositions that may generally be referred to as adhesives. For example, the base resins BR1, BR2, BR3 may be acrylic resins, urethane resins, silicone resins, epoxy resins, etc. The base resins BR1, BR2, BR3 may be transparent resins. In an embodiment, each of the first base resin BR1, the second base resin BR2, and the third base resin BR3 may be the same as or different from each other.

[0118] Reference Figure 5b According to an embodiment, the display device DD may further include an anti-reflection layer AR disposed on the color filter layer CFL. The anti-reflection layer AR may include a high refractive layer and a low refractive layer. For example, the anti-reflection layer AR may be a structure in which the high refractive layer and the low refractive layer are alternately stacked. The anti-reflection layer AR may include Si 3 N 4 、SiN x 、SiO 2 、Al 2 O 3 , Nb 2 O 5 、AlN、SiO、AlO x N y 、SiO x N y 、Si u Al v O x N y MgF 2 ,MgO,TiO 2 ,GeO 2 MgAl 2 O 4, BaF 2 , CaF 2 ,DyF 3 , YbF 3 , YF 3 , CeF 3 、 2 O 5 , HfO 2 、ZrO 2 、MoO 3 or any one of their combinations. The display device DD according to an embodiment further includes an anti-reflection layer AR, which can improve display efficiency by reducing external light reflection.

[0119] The display device DD according to one embodiment may further include a low refractive layer LR between the light control layer CCL and the color filter layer CFL. The low refractive layer LR may be a layer having a lower refractive index than the color filter layer CFL and the light control layer CCL adjacent to the low refractive layer LR. The low refractive layer LR may totally reflect a portion of the blue light emitted from the light control layer CCL toward the color filter layer CFL and re-incend the light control layer CCL. The blue light may be light emitted from the light emitting element OLED. A portion of the blue light may be re-incident toward the first light control unit CCP1 or the second light control unit CCP2 included in the light control layer CCL. As described above, the first light control unit CCP1 may change the re-incident blue light into red light, and the second light control unit CCP2 may change the re-incident blue light into green light. The light efficiency of the display device DD may be improved by such light recycling.

[0120] Reference Figure 5c According to an embodiment, the display device DD may further include an ultraviolet blocking layer UL disposed on the color filter layer CFL. The ultraviolet blocking layer UL may be a layer that blocks light in a wavelength range below 450nm. The ultraviolet blocking layer UL blocks ultraviolet rays, thereby reducing the amount of light incident on the second portion O2 of the color filter layer CFL. The ultraviolet blocking layer UL may include at least one of a light absorber and a light stabilizer for ultraviolet light. As a light absorber, the ultraviolet blocking layer UL may include benzophenone compounds, benzotriazole compounds, or triazine compounds, and as a light stabilizer, the ultraviolet blocking layer UL may include tetramethyl piperidine, etc. However, the substances included in the ultraviolet blocking layer UL are not limited thereto, and the ultraviolet blocking layer UL may also include other substances that perform the function of blocking light in a wavelength range below 450nm as needed.

[0121] The following reference Figure 6a as well as Figure 6b A method for manufacturing a display device according to an embodiment of the present invention is described.

[0122] Figure 6a as well as Figure 6b The diagrams sequentially show some steps in a method for manufacturing a display device according to an embodiment of the present invention. Figure 6a as well as Figure 6b The method of forming the cover layer OC in the method of manufacturing the display device DD according to one embodiment of the present invention is shown in detail. On the other hand, in describing the method of manufacturing the display device according to one embodiment of the present invention, the same reference numerals are given to the same structures as those described above and detailed descriptions are omitted.

[0123] Reference Figure 6a , a method for manufacturing a display device according to an embodiment of the present invention may include the step of forming a preliminary cover layer P_OC on the first and second filters CF1, CF2 configured to overlap each of the first light emitting area PXA-R and the second light emitting area PXA_G and the preliminary third filter P_CF3 configured to overlap the third light emitting area PXA_B. The preliminary third filter P_CF3 overlapping the third light emitting area PXA_B may have a relatively higher height than the first and second filters CF1, CF2 overlapping the first light emitting area PXA-R and the second light emitting area PXA_G. The preliminary third filter P_CF3 overlapping the non-light emitting area NPXA may be arranged on the first and second filters CF1, CF2. The preliminary cover layer P_OC may include a first portion O1 overlapping the non-light emitting area NPXA and a preliminary second portion P_O2 overlapping the light emitting areas PXA-R, PXA-G, and PXA-B. The first portion O1 and the preliminary second portion P_O2 of the preliminary cover layer P_OC may be formed as a whole at the same time by the same material and by the same process.

[0124] Reference Figure 6a as well as Figure 6b, a method for manufacturing a display device according to an embodiment of the present invention may include a step of forming a second portion O2 by irradiating ultraviolet light UV to the prepared second portion P_O2. The step of forming the second portion O2 may include a step of irradiating ultraviolet light UV to the cover layer OC overlapping the light-emitting regions PXA-R, PXA-G, and PXA-B. The second portion O2 may include a first substance formed by decomposing at least a portion of the first dye contained in the prepared second portion P_O2 by ultraviolet light UV. Thus, the weight percentage of the first dye included in the first portion O1 may be relatively higher than that of the second portion O2. The step of irradiating ultraviolet light UV to the prepared second portion P_O2 may include a step of decomposing at least a portion of the prepared third filter P_CF3 to form the third filter CF3. For example, the prepared third filter P_CF3 may include a blue dye, and at least a portion of the blue dye in the prepared third filter P_CF3 overlapping the third light-emitting region PXA-B is decomposed by the irradiated ultraviolet light UV. Thus, the heights of the first and second filters CF1 and CF2 and the height of the third filter CF3 may be substantially the same.

[0125] Hereinafter, the characteristic evaluation results of the display device according to one embodiment of the present invention will be described with reference to the above-mentioned drawings, examples and comparative examples. In addition, the examples shown below are examples for helping to understand the present invention, and the scope of the present invention is not limited thereto.

[0126] (Manufacturing of Display Device)

[0127] The following embodiment, comparative example 1 and comparative example 2 are manufactured to have the same configuration except for the color filter layer. Specifically, the embodiment is manufactured to include first to third filters CF1, CF2, CF3 and an overcoat layer OC. Figure 3 The display device DD structure of the comparative example 1 is manufactured to include the first and second filters CF1, CF2, the preliminary third filter P_CF3 and the preliminary cover layer P_OC. Figure 7a The display device DD-C1 structure is as follows. Compared with the comparative example 1, the comparative example 2 does not include the preliminary cover layer P_OC and is manufactured in a manner including only the first and second filters CF1, CF2 and the preliminary third filter P_CF3. Figure 7b The display device DD-C2 is constructed.

[0128] (Evaluation of Display Device)

[0129] Figure 8 is a graph showing the light transmittance values ​​of the embodiment and the comparative example 1. Specifically, Figure 8 , the transmittance values ​​of the embodiment and the comparative example 1 are shown according to the wavelength range in the light emitting regions PXA-R, PXA-G, and PXA-B. Figure 8It can be confirmed that the transmittance value of the embodiment for the visible light wavelength in the luminous areas PXA-R, PXA-G, and PXA-B is high compared with the comparative example 1. On the contrary, it can be confirmed that the transmittance value of the comparative example for the light in the wavelength range of 580nm to 600nm is relatively low compared with the light in other wavelength ranges.

[0130] Fig. 9 : is a graph showing color coordinates of the CIE1931 standard colorimetric system according to the embodiment and the comparative example 2. Fig. 9 The average values ​​of the color coordinates for the embodiment and the comparative example 2 are shown. Fig. 9 , it can be confirmed that the light emitted from the light emitting element OLED becomes white by comparing the embodiment with the comparative example 2. That is, it can be confirmed that the embodiment emits relatively high purity light in the white wavelength region.

[0131] The display device according to an embodiment of the present invention includes a first dye in a covering layer, and includes portions containing the first dye in different weight percentages in a covering layer. Specifically, the display device according to an embodiment includes a relatively high proportion of the first dye in the covering layer overlapping the non-luminous region compared to the covering layer overlapping the luminous region. In addition, the covering layer overlapping the luminous region includes a first substance formed by at least a portion of the first dye being degraded by ultraviolet rays.

[0132] The existing display device includes an optical component including a dye on the light-emitting element to reduce external light reflection. However, when a dye having a light absorption function for visible light is included, the problem of reducing light transmittance and display efficiency is generated. In addition, the existing display device includes a plurality of color filters on the light-emitting element to increase the color reproduction rate and reduce external light reflection. However, the third blue filter occupies a relatively wide area compared with the first and second filters of red and green, and the problem of the emitted light becoming blue is generated. The present invention realizes the whitening effect of the emitted light by configuring a covering layer including a first dye on the color filter, and can meet the effect of increasing display efficiency and reducing external light reflection by including a first substance formed by degradation of the first dye in the covering layer overlapping the light-emitting area. That is, as the dye is included in the covering layer, the quality of the emitted light can be improved, and as the light absorption ability of the covering layer overlapping the light-emitting area is compared with the covering layer overlapping the non-light-emitting area, the light transmittance and color reproduction rate can be improved. Therefore, in a display device according to an embodiment of the present invention, when the cover layer includes a dye, the light emitting quality and display efficiency can be improved as the absorbance of the cover layer overlapping the light emitting area is relatively low, thereby providing a display device with improved reliability.

[0133] The above description is made with reference to the preferred embodiments of the present invention, but it is understood by those skilled in the art or those with common knowledge in the art that various modifications and changes can be made to the present invention without departing from the concept of the present invention and the scope of the technical field recorded in the attached claims. Therefore, the technical scope of the present invention is not limited to the contents recorded in the detailed description of the specification, but should be determined by the claims.

Claims

1. A display device, wherein: include: A display panel divided into a light-emitting area that emits light and a non-light-emitting area adjacent to the light-emitting area; as well as A covering layer is disposed on the display panel. The covering layer comprises: a first portion overlapping the non-luminescent region and comprising a first dye; as well as The second part overlaps the light emitting region and includes a first substance formed by degrading at least a portion of the first dye.

2. The display device according to claim 1, wherein: The first substance is a substance formed by at least a portion of the first dye being degraded by ultraviolet light.

3. The display device according to claim 2, wherein: The first dye comprises a chromophore, The first substance is a substance in which at least a part of the chromophore is destroyed by the ultraviolet rays.

4. The display device according to claim 1, wherein: The absorbance of the first portion to visible light is higher than the absorbance of the second portion to the visible light.

5. The display device according to claim 1, wherein: The absorption wavelength range of the first dye is 530 nm or more and 600 nm or less.

6. The display device according to claim 1, wherein: The first dye includes at least one selected from the group consisting of anthraquinone compounds, phthalocyanine compounds, azo compounds, perylene compounds, xanthene compounds, diimmonium compounds, methylene dipyrrole compounds, tetraazaporphyrin compounds, porphyrin compounds, squarylium compounds, oxazine compounds, triarylmethane compounds and cyanine compounds.

7. The display device according to claim 1, wherein: The covering layer also includes a pigment.

8. The display device according to claim 1, wherein: The display device further includes: an ultraviolet blocking layer, disposed on the cover layer and overlapping the non-luminous area, The ultraviolet blocking layer includes a light absorber or a light stabilizer for ultraviolet light.

9. The display device according to claim 1, wherein: The display panel comprises: a light emitting element, emitting light of a first color, The light-emitting region includes a first light-emitting region that emits a second color light different from the first color light, a second light-emitting region that emits a third color light different from the first color light and the second color light, and a third light-emitting region that transmits the first color light. The display device further includes: A light control layer is disposed between the display panel and the cover layer. The light control layer comprises: A first light control unit overlaps the first light emitting area and converts the first color light into the second color light; and The second light control unit overlaps the second light emitting area and converts the first color light into the third color light.

10. The display device according to claim 9, wherein: The display device further includes: A color filter layer is disposed between the display panel and the light control layer. The color filter layer comprises: a first filter, overlapping the first light emitting area and blocking the first color light and the third color light; a second filter overlapping the second light emitting area and blocking the first color light and the second color light; and The third filter overlaps the third light emitting area and blocks the second color light and the third color light.

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