Indicating device

Abstract

To provide a display device in which color sense of reflected light generated by reflection of external light is adjusted to improve display quality.SOLUTION: A display device DS includes: a display panel having a light-emitting area PXA and a non-light emitting area NPXA adjacent to the light-emitting area; a color conversion layer arranged on the display panel; a light-shielding layer, disposed on the display panel, defining a main opening corresponding to the light-emitting area and a sub opening corresponding to the non-light emitting area; and a color filter layer arranged on the color conversion layer. The color filter layer achieves excellent reflected color sense by having a main filter portion corresponding to the main opening, a sub filter portion corresponding to the sub opening, and the sub opening and a non-overlapping light-shielding filter portion.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly, to a display device including a color filter layer and a color conversion layer.

Background Art

[0002] A variety of display devices used in multimedia devices such as televisions, mobile phones, tablet computers, navigation systems, and game machines have been developed. When using such a display device, if external light is incident on the display device, the incident external light is reflected at the interface between the electrodes in the display panel or the layers stacked in the display device, and the display quality deteriorates.

[0003] Therefore, research is required to improve the deterioration of the display quality caused by the light incident from the outside.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a display device that adjusts the color sensation of the reflected light generated by reflection by external light and improves the display quality.

[0006] Another object of the present invention is to provide a display device that improves a yellowish color sensation and has a neutral reflection color.

Means for Solving the Problem

[0007] One embodiment of the present invention includes a display panel having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, a color conversion layer disposed on the display panel, a light-shielding layer disposed on the display panel and defining a main opening corresponding to the light-emitting region and a sub-opening corresponding to the non-light-emitting region, and a color filter layer disposed on the color conversion layer. The color filter layer includes a main filter portion corresponding to the main opening, a sub-filter portion corresponding to the sub-opening, and a light-shielding filter portion corresponding to the non-light-emitting region and non-overlapping with the sub-opening, and provides a display device.

[0008] The display panel may include an organic electroluminescent element that emits first color light.

[0009] The color conversion layer may include a first color conversion portion including first quantum dots that convert the first color light into second color light, a second color conversion portion including second quantum dots that convert the first color light into third color light, and a third color conversion portion that transmits the first color light.

[0010] The color filter layer includes a first filter that transmits the second color light, a second filter that transmits the third color light, and a third filter that transmits the first color light. The first to third filters each include the main filter portion and the light-shielding filter portion, and at least one of the first to third filters may further include the sub-filter portion.

[0011] The first color light is blue light, the second color light is red light, the third color light is green light. The first to third filters include the sub-filter portion, and the second filter may not include the sub-filter portion.

[0012] The third color conversion portion and the third filter may be provided integrally.

[0013] The first color conversion unit to the third color conversion unit may further include a scattering agent.

[0014] The color filter layer may include a third filter that overlaps with the third color conversion unit and transmits the first color light, and a fourth filter that overlaps with the first color conversion unit and the second color conversion unit and transmits the fourth color light.

[0015] The light shielding layer is disposed between the display panel and the color filter layer.

[0016] The light shielding layer may be disposed on the color conversion layer, and the color filter layer may cover the light shielding layer.

[0017] The color filter layer may be directly disposed on the color conversion layer.

[0018] One embodiment of the present invention provides a display device including a light emitting region, a reflection region spaced apart from the light emitting region on a plane, and a light shielding region surrounding the light emitting region and the reflection region, the display device including a display panel including an organic electroluminescent element, a color conversion layer disposed on the display panel and including a plurality of color conversion units disposed corresponding to the light emitting region, a color filter layer disposed on the color conversion layer and including a plurality of filters, and a light shielding layer disposed on the display panel and including a light shielding portion that overlaps with the light shielding region and does not overlap with the light emitting region and the reflection region.

[0019] The light emitting region includes a red light emitting region, a green light emitting region, and a blue light emitting region, and the reflection region may include a red reflection region and a blue reflection region.

[0020] The light emitting region includes a plurality of red light emitting regions, a plurality of green light emitting regions, and a plurality of blue light emitting regions, the red light emitting regions, the green light emitting regions, and the blue light emitting regions are alternately arranged in a first direction, and each of the red light emitting regions, the green light emitting regions, and the blue light emitting regions may be aligned in a second direction intersecting the first direction.

[0021] The reflection region may include a red reflection region provided between the red light-emitting regions aligned in the second direction and a blue reflection region provided between the blue light-emitting regions aligned in the second direction.

[0022] The organic electroluminescent element emits blue light, and the color conversion unit may include a first color conversion unit disposed corresponding to the red light-emitting region and including red quantum dots, a second color conversion unit disposed corresponding to the green light-emitting region and including green quantum dots, and a third color conversion unit disposed corresponding to the blue light-emitting region.

[0023] The filter includes a red filter that overlaps the red light-emitting region and the red reflection region, a green filter that overlaps the green light-emitting region, and a blue filter that overlaps the blue light-emitting region and the blue reflection region. In a plane, the area of the red light-emitting region may be larger than the areas of the green light-emitting region and the blue light-emitting region.

[0024] The ratio of the area of the reflection region to the total area of the light-emitting region, the reflection region, and the light-shielding region may be greater than 0% and less than or equal to 10%.

[0025] One embodiment of the present invention provides a display device including a display panel including an organic electroluminescent element, a color conversion layer disposed on the display panel and including a plurality of color conversion units spaced apart from each other in a plane, a light-shielding layer disposed on the display panel and defining a main opening overlapping the color conversion unit and a sub-opening non-overlapping the color conversion unit, and a color filter layer disposed on the color conversion layer and including a plurality of filters. Each filter includes a main filter portion overlapping the main opening and a light-shielding filter portion adjacent to the main filter portion. At least one of the filters further includes a sub-filter portion adjacent to the light-shielding filter portion and spaced apart from the main filter portion.

Effects of the Invention

[0026] The display device according to an embodiment of the present invention exposes a part of the color filter layer in a non-light-emitting region, showing an improved reflected color sense.

[0027] Also, the display device according to an embodiment of the present invention defines an opening in a light-shielding layer corresponding to a non-light-emitting region, and includes a light-shielding portion and a non-overlapping color filter in the non-light-emitting region to show a neutral color sense.

Brief Description of the Drawings

[0028]

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Mode for Carrying Out the Invention

[0029] Since the present invention can be subjected to various modifications and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood to include all modifications, equivalents, and alternatives included in the gist and technical scope of the present invention.

[0030] In this specification, when a component (or region, layer, part, etc.) is referred to as being "on" or "coupled to" another component, it means that it can be directly disposed, connected, or coupled on the other component, or a third component can be disposed between them.

[0031] On the other hand, in this application, "directly disposed" may mean that there is no additional layer, film, region, plate, etc. added between parts such as a layer, film, region, plate, etc. and other parts. For example, "directly disposed" may mean disposing without using an additional member such as an adhesive member between two layers or two members.

[0032] The same reference numerals denote the same components. Also, in the drawings, the thickness, ratio, and dimensions of the components are exaggerated for an effective explanation of the technical content.

[0033] "And / or" includes all combinations of one or more of the associated configurations defined.

[0034] Terms such as first, second, etc. are used to describe various components, but the components are not limited to the terms. The terms are used only for the purpose of distinguishing one structural element from other components. For example, within the scope not departing from the scope of the rights of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0035] Also, terms such as "below", "underneath", "above", "on top of", etc. are used to explain the association relationship of the configurations shown in the drawings. The terms are relative concepts and are explained based on the directions shown in the drawings.

[0036] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present invention pertains. Also, terms such as those defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or overly formal sense unless explicitly defined here.

[0037] Terms such as "comprising" or "having" specify the presence of the features, numbers, steps, operations, components, parts, or combinations thereof described above in the specification, and it should be understood that the presence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

[0038] Hereinafter, with reference to the drawings, a display device according to an embodiment of the present invention will be described.

[0039] FIG. 1 is a perspective view showing an embodiment of the present invention of the electronic device ED. In one embodiment of the present invention, the electronic device ED is a large electronic device such as a television, a monitor, or an external billboard. Further, the electronic device ED is a medium and small-sized electronic device such as a personal computer, a notebook computer, a personal information terminal, a car navigation unit, a game machine, a smartphone, a tablet, and a camera. Also, these are merely presented as one embodiment, and may be adopted as other electronic devices without departing from the concept of the present invention.

[0040] The electronic device ED includes a display device DS and a housing HAU. The display device DS displays an image IM through a display surface IS. In FIG. 1, it is shown that the display surface IS is parallel to the surface defined by the first direction axis DR1 and the second direction axis DR2 that intersects the first direction axis DR1. However, this is exemplary, and in other embodiments, the display surface IS of the display device DS may have a curved shape.

[0041] The normal direction of the display surface IS, that is, the direction in which the image IM is displayed in the thickness direction of the display device DS is indicated by the third direction axis DR3. Also, the direction opposite to the third direction axis in the thickness direction of the display device DS is indicated by the fourth direction axis DR4. The front (or upper) surface and the back (or lower) surface of each member are separated by the third direction axis DR3. On the other hand, the directions indicated by the first to fourth direction axes DR1, DR2, DR3, DR4 are relative concepts and may be changed to other directions.

[0042] The housing HAU houses the display device DS. The housing HAU is arranged while covering the display device DS so that the upper surface, which is the display surface IS of the display device DS, is exposed. The housing HAU covers the side surface and the bottom surface of the display device DS and exposes the entire upper surface. However, this embodiment is not limited thereto, and the housing HAU may cover not only the side surface and the bottom surface of the display device DS but also a part of the upper surface.

[0043] FIG. 2 is a plan view showing a display device according to an embodiment of the present invention. FIG. 3 shows a cross-sectional view corresponding to line I-I' in FIG. 2, and FIG. 4 shows a cross-sectional view corresponding to line II-II' in FIG. 2. FIG. 5 is a plan view showing a part of the display device according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view showing a part of the display device according to an embodiment of the present invention.

[0044] Referring to FIG. 2, the display device DS of the present embodiment includes a display area DA and a non-display area NDA adjacent to the display area DA. The display area DA corresponds to the portion where the video IM (FIG. 1) is displayed.

[0045] In the present embodiment, the display area DA is rectangular. The emergency area NDA surrounds the display area DA. However, it is not limited thereto, and the shape of the display area DA and the shape of the non-display area NDA may be designed relatively. Also, the non-display area NDA may not exist on the display surface IS which is the front surface of the display device DS.

[0046] In the present embodiment, the display device DS includes a display panel DP, a color conversion layer CCL disposed on the display panel DP, a light shielding layer BML disposed on the display panel DP, and a color filter layer CFL disposed on the color conversion layer CCL. In the present embodiment, the display panel DP includes an organic electroluminescent element OEL. That is, the display panel DP is an organic electroluminescent display panel.

[0047] Referring to FIG. 2, the display device DS of the present embodiment includes a light emitting area PXA and a non-light emitting area NPXA. The non-light emitting area NPXA is adjacent to the light emitting area PXA. On the other hand, the light emitting area PXA and the non-light emitting area NPXA of the display device DS respectively correspond to the light emitting area PXA and the non-light emitting area NPXA of the display panel DP.

[0048] The light-emitting region PXA includes first to third light-emitting regions PXA-R, PXA-G, and PXA-B. The first to third light-emitting regions PXA-R, PXA-G, and PXA-B are spaced apart from each other on a plane. In the display device DS of the present embodiment, a plurality of light-emitting regions PXA-R, PXA-G, and PXA-B are repeatedly arranged in the direction of the first direction axis DR1 in the order of the first light-emitting region PXA-R, the second light-emitting region PXA-G, and the third light-emitting region PXA-B.

[0049] On the other hand, a plurality of first light-emitting regions PXA-R are arranged in alignment in the direction of the second direction axis DR2 intersecting the first direction axis DR1, a plurality of second light-emitting regions PXA-G are arranged in alignment in the direction of the second direction axis DP2, and a plurality of third light-emitting regions PPXA-B are arranged in alignment in the direction of the second direction axis DP2.

[0050] For example, in the display device DS of the present embodiment, the first light-emitting region PXA-R is a red light-emitting region that provides red light, the second light-emitting region PXA-G is a green light-emitting region that provides green light, and the third light-emitting region PXA-B is a blue light-emitting region that provides blue light.

[0051] That is, referring to FIG. 2, each of a plurality of red light-emitting regions, a plurality of green light-emitting regions, and a plurality of blue light-emitting regions is aligned along the second direction axis DR2. Further, the red light-emitting region, the green light-emitting region, and the blue light-emitting region are alternately arranged along the first direction axis DR1. That is, they are repeatedly arranged along the first direction axis DR1 in the order of the red light-emitting region, the green light-emitting region, and the blue light-emitting region. However, the present embodiment is not limited to this, and the arrangement order and arrangement direction of the light-emitting regions that provide different lights may be variously changed.

[0052] In the present embodiment, the non-light-emitting region NPXA includes a reflection region RA and a light-shielding region BA. The reflection region RA is a portion where light incident from the outside of the display device DS is reflected inside the display device DS and emitted. The light-shielding region BA surrounds the light-emitting region PXA and the reflection region RA. The light-shielding region BA is a portion corresponding to a light-shielding portion BM described later.

[0053] The reflection region RA includes at least one of a first reflection region RA-R adjacent to the first light-emitting region PXA-R and providing light in a wavelength region similar to the light provided by the first light-emitting region PXA-R, and a second reflection region RA-B adjacent to the third light-emitting region PXA-B and providing light in a wavelength region similar to the light provided by the third light-emitting region PXA-B.

[0054] For example, the reflection region RA may include a red reflection region that is the first reflection region RA-R and a blue reflection region that is the second reflection region RA-B.

[0055] The first reflection region RA-R is provided between the first light-emitting regions PXA-R that are spaced apart and aligned in the direction of the second direction axis DR2. Also, the second reflection region RA-B is provided between the third light-emitting regions PXA-B that are spaced apart and aligned in the direction of the second direction axis DR2.

[0056] That is, referring to FIG. 2, in the display device DS of the present embodiment, the light-emitting regions PXA-R, PXA-G, PXA-B, the light-shielding region BA, the reflection regions RA-R, RA-B, and the light-shielding region BA are repeatedly arranged along the second direction axis DR2.

[0057] On the other hand, in FIG. 2, it is shown that the first light-emitting region PXA-R and the first reflection region RA-R intersect one by one in the direction of the second direction axis DR2, but the present embodiment is not limited to this, and the arrangement interval of the first reflection region RA-R may be adjusted in consideration of the reflection color feeling required in the display device DS. For example, the arrangement interval of the first reflection region RA-R may be longer than that shown in FIG. 2. Specifically, two first light-emitting regions PXA-R and one first reflection region RA-R may be arranged in this order. However, the present embodiment is not limited to this.

[0058] Also, regarding the third light-emitting region PXA-B and the second reflection region RA-B, the same description as that regarding the arrangement relationship between the first light-emitting region PXA-R and the first reflection region RA-R is applicable.

[0059] In this embodiment, the display panel DP includes a base layer BL, a circuit layer DP-CL provided on the base layer BL, and a display element layer DP-OEL. In this embodiment, the base layer BL, the circuit layer DP-CL, and the display element layer DP-OEL are sequentially stacked in the direction of the third-axis DR3.

[0060] The base layer BL is a member including a base surface on which the display element layer EP-OEL is disposed. The base layer BL is a glass substrate, a metal substrate, a plastic substrate, or the like. However, this embodiment is not limited thereto, and the base layer BL may be an inorganic layer, an organic layer, or a composite material layer.

[0061] In this embodiment, the circuit layer DP-CL is disposed on the base layer BL, and the circuit layer DP-CL includes a plurality of transistors (not shown). Each transistor (not shown) includes a control electrode, an input electrode, and an output electrode. For example, the circuit layer DP-CL may include a switching transistor and a driving transistor for driving the organic electroluminescent element OEL.

[0062] The display element layer DP-OEL includes an organic electroluminescent element OEL and a sealing layer TFE. The organic electroluminescent element OEL includes a first electrode EL1, a hole transport region HTR disposed on the first electrode EL1, a light-emitting layer EML disposed on the hole transport region HTR, an electron transport region ETR disposed on the light-emitting layer EML, and a second electrode EL2 disposed on the electron transport region ETR.

[0063] The sealing layer TFE is disposed on the organic light-emitting element OEL. The sealing layer TFE covers the organic light-emitting element OEL. The organic electroluminescent element OEL is sealed by the sealing layer TFE.

[0064] The first electrode EL1 constituting the organic electroluminescent element OEL has conductivity. The first electrode EL1 is made of a metal alloy or a conductive compound. The first electrode EL1 is an anode. The first electrode EL1 is a pixel electrode.

[0065] In the organic electroluminescent element OEL according to the present embodiment, the first electrode EL1 is a reflective electrode. However, the present embodiment is not limited thereto. For example, the first electrode EL1 may be a transmissive electrode or a semi-transmissive electrode. The first electrode EL1 may be a semi-transmissive electrode or a reflective electrode. For example, the first electrode EL1 contains Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF / Ca, LiF / Al, Mo, Ti, or a compound or mixture thereof (for example, a mixture of Ag and Mg). Further, it may be a multilayer structure including a reflective film or a semi-transmissive film made of the exemplified substances, and a transparent conductive film made of ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide), ITZO (indium tin zinc oxide), etc. For example, the first electrode EL1 may be a multilayer metal film, or may have a structure in which a metal film of ITO / Ag / ITO is laminated.

[0066] The hole transport region HTR has a single layer structure composed of a single substance, a single layer structure composed of a plurality of different substances, or a multilayer structure having a plurality of layers composed of a plurality of different substances. For example, the hole transport region HTR may have a single layer structure composed of a plurality of different substances, or may have a structure of a hole injection layer / hole transport layer, a hole injection layer / hole transport layer / buffer layer, a hole injection layer / buffer layer, a hole transport layer / buffer layer, or a hole injection layer / hole transport layer / electron blocking layer laminated in order from the first electrode EL1. However, the present embodiment is not limited thereto.

[0067] For example, the hole transport region HTR may include a hole injection layer and a hole transport layer, and a known hole injection substance and a known hole transport substance may be used for the hole injection layer and the hole transport layer, respectively.

[0068] On one hand, the hole transport region HTR is disposed on the first electrode EL1 within the opening defined by the pixel definition film PDL and extends and is disposed above the pixel definition film PDL. However, the present embodiment is not limited thereto, and the hole transport region HTR may be patterned to be disposed inside the opening defined by the pixel definition film PDL.

[0069] The light-emitting layer EML is provided above the hole transport region HTR. The light-emitting layer EML has a single-layer structure composed of a single substance, a single-layer structure composed of a plurality of different substances, or a multilayer structure having a plurality of layers composed of a plurality of different substances.

[0070] In the display device DS of the present embodiment, the light-emitting layer EML emits blue light. The light-emitting layer EML is not particularly limited as long as it is a commonly used substance, and includes a fluorescent substance or a phosphorescent substance. Further, the light-emitting layer EML includes a host and a dopant. In FIG. 3, the light-emitting layer EML is shown as being provided as a common layer throughout the first to third light-emitting regions PXA-R, PXA-G, and PXA-B. However, the present embodiment is not limited thereto, and different from the illustration in FIG. 3, the light-emitting layer EML may be disposed within the opening defined by the pixel definition film PDL. For example, if the light-emitting layer EML is divided and provided by the pixel definition film PDL, the light-emitting layer EML corresponding to each of the light-emitting regions PXA-R, PXA-G, and PXA-B may emit light in the same wavelength region or in different wavelength regions.

[0071] The electron transport region ETR is provided above the light-emitting layer EML. The electron transport region ETR includes at least one of a hole blocking layer, an electron transport layer, and an electron injection layer, but is not limited thereto.

[0072] If the electron transport region ETR includes an electron injection layer and an electron transport layer, a known electron injection substance and a known electron transport substance are used for the electron injection layer and the electron transport layer, respectively.

[0073] The second electrode EL2 is provided on the electron transport region ETR. The second electrode EL2 is a common electrode or a cathode. The second electrode EL2 is made of a metal alloy or a conductive compound. The second electrode EL2 is a transmissive electrode, a semi-transmissive electrode, or a reflective electrode. If the second electrode layer EL2 is a transmissive electrode, the second electrode layer EL2 is made of a transparent metal oxide, for example, ITO, IZO, ZnO, ITZO, etc.

[0074] If the second electrode EL2 is a semi-transmissive electrode or a reflective electrode, the second electrode EL2 contains Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF / Ca, LiF / Al, Mo, Ti, or compounds and mixtures thereof (for example, a mixture of Ag and Mg). Further, it is a multi-layer structure including a reflective film or a semi-transmissive film formed of the exemplified substances, and a transparent conductive film made of ITO, IZO, ZnO, ITZO, etc.

[0075] Referring to FIG. 3, the electron transport region ETR and the second electrode EL2 are arranged not only in the region overlapping with the first electrode EL1 but also further extended on the pixel definition film PDL. On the other hand, although not shown, the second electrode EL2 is connected to the auxiliary electrode. When the second electrode EL2 is connected to the auxiliary electrode, the resistance of the second electrode EL2 can be reduced.

[0076] The display element layer DP-OEL includes a plurality of organic electroluminescent elements OEL. The plurality of organic electroluminescent elements OEL are divided by the pixel definition film PDL. For example, referring to FIG. 3, in this embodiment, the display element layer DP-OEL includes the first electrodes EL1 separated from each other on a plane, and a pixel definition film PDL may be provided between the separated first electrodes EL1. That is, in the display device DS according to an embodiment of the present invention shown in FIG. 3, the plurality of organic electroluminescent elements OEL are divided based on the first electrodes EL1 separated from each other.

[0077] In the display panel DP according to the present embodiment, each of the light-emitting regions PXA-R, PXA-G, and PXA-B is a region defined by the pixel definition film PDL. The non-light-emitting region NPXA is a region between adjacent light-emitting regions PXA-R, PXA-G, and PXA-B, and is a region corresponding to the pixel definition film PDL.

[0078] The pixel definition film PDL is made of a polymer resin. For example, the pixel definition film PDL is formed including a polyacrylate-based resin or a polyimide-based resin. Further, the pixel definition film PDL is formed including an inorganic substance in addition to the polymer resin. On the other hand, the pixel definition film PDL is formed including a light absorption substance or including a black pigment or a black dye. The pixel definition film PDL formed including a black pigment or a black dye embodies a black pixel definition film. When forming the pixel definition film PDL, carbon black or the like may be used as the black pigment or the black dye, but the present embodiment is not limited thereto.

[0079] Also, the pixel definition film PDL is made of an inorganic substance. For example, the pixel definition film PDL may be formed including silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiOxNy), or the like. The pixel definition film PDL defines the light-emitting regions PXA-R, PXA-G, and PXA-B. The light-emitting regions PXA-R, PXA-G, and PXA-B and the non-light-emitting region NPXA are defined by the pixel definition film PDL.

[0080] A sealing layer TFE is disposed on the organic electroluminescent element OEL, and the sealing layer TFE is disposed on the second electrode EL2. The sealing layer TFE is disposed directly on the second electrode EL2. The sealing layer TFE is formed by laminating one sub-layer or a plurality of sub-layers. The sealing layer TFE is a thin film sealing layer. The sealing layer TFE protects the organic electroluminescent element OEL. The sealing layer TFE covers the upper surface of the second electrode EL2.

[0081] On the display panel DP, a color conversion layer CCL is disposed. The color conversion layer CCL includes a light converter. The light converter is a quantum dot or a phosphor, etc. The light converter converts the provided light in terms of wavelength and emits it. That is, the color conversion layer CCL is a layer including quantum dots or a layer including phosphors.

[0082] The color conversion layer CCL includes a plurality of color conversion portions CCL1, CCL2, and CCL3. The color conversion portions CCL1, CCL2, and CCL3 are spaced apart from each other.

[0083] Referring to FIG. 3, a light-shielding portion BM is provided between the color conversion portions CCL1, CCL2, and CCL3 that are spaced apart from each other, but the present embodiment is not limited thereto. In FIG. 3, the light-shielding portion BM is shown as non-overlapping with the color conversion portions CCL1, CCL2, and CCL3, but at least a part of the edges of the color conversion portions CCL1, CCL2, and CCL3 overlaps with the light-shielding portion BM.

[0084] The color conversion layer CCL is disposed on the display panel DP. For example, the color conversion layer CCL may be directly disposed on the sealing layer TFE. However, the present embodiment is not limited thereto, and a barrier layer (not shown) may be further disposed between the sealing layer TFE and the color conversion layer CCL.

[0085] The barrier layer (not shown) serves to prevent the penetration of moisture and / or oxygen (hereinafter referred to as "moisture / oxygen"). The barrier layer (not shown) is disposed on the color conversion layer CCL to block the color conversion layer CCL from being exposed to moisture / oxygen. On the other hand, the barrier layer (not shown) covers the color conversion layer CCL. Also, the barrier layer (not shown) is provided between the color conversion layer CCL and the color filter layer CFL.

[0086] The barrier layer (not shown) includes at least one inorganic layer. That is, the barrier layer (not shown) is formed by including an inorganic substance. For example, the barrier layer (not shown) may be formed by including silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, a metal thin film with ensured light transmittance, and the like. On the other hand, the barrier layer (not shown) further includes an organic film. The barrier layer (not shown) is composed of a single layer or a plurality of layers.

[0087] The color conversion layer CCL includes a first color conversion part CCL1 including first quantum dots QD1 that convert the first color light provided from the organic electroluminescent element OEL into second color light, a second color conversion part CCL1 including second quantum dots QD2 that convert the first color light into third color light, and a third color conversion part CCL3 that transmits the first color light.

[0088] In the present embodiment, the first color conversion part CCL1 provides red light which is the second color light, and the second color conversion part CCL2 provides green light which is the third color light. The third color conversion part CCL3 provides the blue light which is the first color light provided from the organic electroluminescent element OEL by transmitting it. For example, the first quantum dots QD1 may be red quantum dots, and the second quantum dots QD2 may be green quantum dots.

[0089] A quantum dot is a particle that converts the wavelength of light provided by a light source panel DP. A quantum dot is a substance having a crystal structure with a size of several nanometers, consisting of about several hundred to several thousand atoms. Due to its small size, it exhibits a quantum confinement effect in which the energy band gap becomes large. When light with a wavelength having higher energy than the band gap is incident on the quantum dot, the quantum dot absorbs the light and becomes an excited state, and then falls to the ground state while emitting light with a specific wavelength. The light with the emitted wavelength has a value corresponding to the band gap. By adjusting its size, composition, etc., the quantum dot can adjust the light emission characteristics due to the quantum confinement effect. Although the hue of the light emitted by the quantum dot changes depending on the particle size, the smaller the particle size of the quantum dot, the more it emits light in the short wavelength region. For example, the particle size of a quantum dot that emits green light may be smaller than that of a quantum dot that emits red light.

[0090] Quantum dots are selected from II-VI group compounds, III-V group compounds, IV-VI group compounds, group IV elements, group IV compounds, and combinations thereof.

[0091] The II-VI group compounds are binary compounds selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HeTe, MgSe, MgS, and mixtures thereof, ternary compounds selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HeSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HeZnSe, HeZnTe, MgZnSe, MgZnS, and mixtures thereof, and quaternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof.

[0092] III-V compounds are selected from the group consisting of binary compounds selected from the group consisting of GaN, GaP, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof, ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, and mixtures thereof, and quaternary compounds selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof. IV-VI compounds are selected from the group consisting of binary compounds selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof, ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof, and quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. Group IV elements are selected from the group consisting of Si, Ge, and mixtures thereof. Group IV elements are binary compounds selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0093] At this time, the binary compound, ternary compound, or quaternary compound is present in the particles at a uniform concentration or is divided into a state where the concentration distribution is partially different and is present in the same particles.

[0094] The quantum dot has a core-shell structure including a shell surrounding the core. Also, one quantum dot has a core / shell structure surrounding another quantum dot. The interface between the core and the shell has a concentration gradient in which the concentration of the elements present in the shell decreases towards the center.

[0095] Quantum dots are particles having a size on the nanometer scale. Quantum dots 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, more preferably about 30 nm or less, and within this range, color purity and color reproducibility can be improved. Also, since the light emitted through such quantum dots is emitted in all directions, the light viewing angle is improved.

[0096] Also, the form of the quantum dots is of a form generally used in the art and is not particularly limited. More specifically, forms such as spherical, pyramid-shaped, multi-arm-shaped, cubic nanoparticles, nanotubes, nanowires, nanofibers, and nanoplates are used.

[0097] The first color conversion unit CCL1 includes a matrix unit MX and first quantum dots QD1 dispersed in the matrix unit MX. The first color conversion unit CCL1 further includes a scattering agent SP dispersed in the matrix unit MX. The second color conversion unit CCL2 includes a matrix unit MX and second quantum dots QD2 dispersed in the matrix unit MX, and further includes a scattering agent SP. Also, the third color conversion unit CCL3 includes a matrix unit MX and a scattering agent SP.

[0098] The matrix unit MX is a medium in which the quantum dots QD1, QD2 or the scattering agent SP are dispersed, and generally consists of various resin compositions referred to as binders. The matrix unit MX consists of a polymer resin composition. For example, the polymer resin composition forming the matrix unit MX may include an acrylic resin, a urethane resin, a silicone resin, an epoxy resin, etc. The polymer resin composition is transparent.

[0099] The scattering agent SP is an inorganic particle. For example, the scattering agent SP may include at least one of TiO 2 , ZnO, Al 2 O 3 , SiO 2 , and hollow silica. The scattering agent SP is TiO 2 , ZnO, Al2 O 3 、 SiO 2 、 and contains at least one of hollow silica, or TiO 2 、 ZnO, Al 2 O 3 、 SiO 2 、 and is a mixture of two or more substances selected from hollow silica.

[0100] The first color conversion unit CCL1 corresponds to the first light emission region PXA-R, the second color conversion unit CCL2 corresponds to the second light emission region PXA-G, and the third color conversion unit CCL3 corresponds to the third light emission region PXA-B.

[0101] In the display device DS of the present embodiment, the color filter layer CFL is disposed on the color conversion layer CCL. For example, the color filter layer CFL may be directly disposed on the color conversion layer CCL. However, the present embodiment is not limited thereto, and a barrier layer (not shown) may be further provided between the color conversion layer CCL and the color filter layer CFL. The barrier layer includes an inorganic layer.

[0102] The color filter layer CFL includes a plurality of filters. The color filter CFL includes a first filter CF1 that transmits second color light, a second filter CF2 that transmits third color light, and a third filter CF3 that transmits 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.

[0103] Each of the filters CF1, CF2, and CF3 includes a polymer photosensitive resin and a pigment or a dye. The first filter CF1 includes a red pigment or dye, the second filter CF2 includes a green pigment or dye, and the third filter CF3 includes a blue pigment or dye.

[0104] On the other hand, the present embodiment is not limited to this, and the third filter CF3 may not contain a pigment or a dye. The third filter CF3 may contain a polymer photosensitive resin and may not contain a pigment or a dye. The third filter CF3 may be transparent. The third filter CF3 may be made of a transparent photosensitive resin.

[0105] The display device DS of the present embodiment includes a light-shielding layer BML disposed on the display panel DP. A main opening OH-M and a sub-opening OH-S are defined in the light-shielding layer BML. The light-shielding layer BML includes a light-shielding portion BM, a main opening OH-M, and a sub-opening OH-S. A light-shielding portion BM is provided between the main openings OH-M, between the main opening OH-M and the sub-opening OH-S, and between the sub-openings OH-S.

[0106] The light-shielding portion BM is a black matrix. The light-shielding portion BM is formed by including an organic light-shielding substance or an inorganic light-shielding substance containing a black pigment or a dye. The light-shielding portion BM prevents a light leakage phenomenon and demarcates the boundary between adjacent color conversion portions CCL1, CCL2, CCL3 or overlaps the boundary between adjacent filters CF1, CF2, CF3.

[0107] The main opening OH-M is defined corresponding to the light-emitting region PXA. The main opening OH-M is defined corresponding to each of the first to third light-emitting regions PXA-R, PXA-G, PXA-B. The sub-opening OH-S is defined corresponding to the non-light-emitting region NPXA. The sub-opening OH-S is defined corresponding to the first to second reflection regions RA-R, RA-B.

[0108] A base substrate BS is disposed on the color filter layer CFL. The base substrate BS is a member including a base surface on which the color filter layer CFL, the light-shielding layer BML, the color conversion portion CCL, etc. are disposed. The base substrate BS is a glass substrate, a metal substrate, a plastic substrate, etc. However, an embodiment of the present invention is not limited to this, and the base substrate BS may be an inorganic layer, an organic layer, or a composite material layer.

[0109] FIG. 4 shows a cross-sectional view of a portion of the display device DS according to an embodiment of the present invention. FIG. 4 shows a cross-section of a portion including the first light-emitting region PXA-R and the first reflection region RA-R adjacent thereto in the display device DS according to an embodiment of the present invention shown in FIG. 2.

[0110] The main exposure region OPA-M, which is the region defined by the main opening OH-M of the light-shielding layer BML, is a region corresponding to each of the first to third light-emitting regions PXA-R, PXA-G, and PXA-B. The sub-exposure region OPA-S defined by the sub-opening OH-S of the light-shielding layer BML is a region corresponding to the reflection region RA.

[0111] Referring to FIG. 4, the main opening OH-M is defined corresponding to the first light-emitting region PXA-R, and the sub-opening OH-S is defined corresponding to the first reflection region RA-R.

[0112] The first filter CF1 is provided on the first color conversion unit CCL1 and the light-shielding layer BML. The first filter CF1 includes a first main filter unit CF1-M, a first light-shielding filter unit CF1-B, and a first sub-filter unit CF1-S.

[0113] The first main filter unit CF1-M is arranged corresponding to the first light-emitting region PXA-R, and the first sub-filter unit CF1-S and the first light-shielding filter unit CF1-B are arranged corresponding to the non-light-emitting region NPXA. The first main filter unit CF1-M is a portion corresponding to the main opening OH-M, and the first sub-filter unit CF1-S is a portion corresponding to the sub-opening OH-S. Also, the first light-shielding filter unit CF1-B is arranged in the non-light-emitting region NPXA and is a portion non-overlapping with the sub-opening OH-S. On the other hand, although FIG. 4 exemplarily shows a cross-section of the non-light-emitting region NPXA including the first light-emitting region PXA-R and the first reflection region RA-R, this is similarly applicable to the non-light-emitting region NPXA including the third light-emitting region PXA-B and the second reflection region RA-B.

[0114] FIG. 5 is a plan view showing a part of the display device corresponding to the AA region in FIG. 2. FIG. 5 shows a plan view of a part including the color filter layer CFL and the light shielding layer BML in the display device DS of an embodiment of the present invention shown in FIG. 3.

[0115] Referring to FIG. 5, a main opening OH-M and a sub-opening OH-S are defined in the light shielding layer BML. The remaining part where the main opening OH-M and the sub-opening OH-S are not defined is the light shielding portion BM.

[0116] When viewed from the plane defined by the first direction axis DR1 and the second direction axis DR2, the main filter portions CF1-M, CF2-M, and CF3-M are exposed in the main opening OH-M, and the sub-filter portions CF1-S and CF3-S are exposed in the sub-opening OH-S. On the other hand, in this specification, the exposure of the filter portion means that the filter portion does not overlap with the light shielding portion BM.

[0117] The area of the first sub-filter portion CF1-S is greater than 0% and less than or equal to 10% of the total area of the first main filter portion CF1-M, the first light shielding filter portion CF1-B, and the first sub-filter portion CF1-S. In the display device DS of this embodiment, the area of the first filter CF1 exposed in the non-light emitting region NPXA is adjusted to be greater than 0% and less than or equal to 10% of the area of the entire display region DA, thereby improving the reflected color sense in the display device DS of this embodiment.

[0118] Also, the area of the third sub-filter portion CF3-S is greater than 0% and less than or equal to 10% of the total area of the third main filter portion CF3-M, the third light shielding filter portion CF3-B, and the third sub-filter portion CF3-S. In the display device DS of this embodiment, the area of the third filter CF3 exposed in the non-light emitting region NPXA is adjusted to be greater than 0% and less than or equal to 10%, thereby improving the reflected color sense in the display device DS of this embodiment.

[0119] FIG. 6 is a cross-sectional view showing a portion corresponding to the line III-III' in FIG. 2. FIG. 6 is a cross-sectional view showing a part of the display device DS. In the cross-sectional view of FIG. 6, while showing a part of the display device DS, for convenience of explanation, the configuration of the display panel DP is shown with omission.

[0120] In the display device DS of the present embodiment, the color conversion layer CCL includes a first color conversion portion CCL1 arranged corresponding to the first light emission region PXA-R, a second color conversion portion CCL2 arranged corresponding to the second light emission region PXA-G, and a third color conversion portion CCL3 arranged corresponding to the third light emission region PXA-B. A light shielding portion BM is arranged between adjacent color conversion portions CCL1, CCL2, and CCL3.

[0121] A color filter layer CFL is arranged on the color conversion portion CCL. The color filter layer CFL includes first to third filters CF1, CF2, and CF3. The boundary between adjacent filters CF1, CF2, and CF3 overlaps with the light shielding portion BM.

[0122] The first filter CF1 includes a first main filter portion CF1-M, a first light shielding filter portion CF1-B adjacent to the first main filter portion CF1-M, and a first sub-filter portion CF1-S separated from the first main filter portion CF1-M. The third filter CF3 includes a third main filter portion CF3-M, a third light shielding filter portion CF3-B adjacent to the third main filter portion CF3-M, and a third sub-filter portion CF3-S separated from the third main filter portion CF3-M.

[0123] The second filter CF2 includes a second main filter portion CF2-M and a second light shielding filter portion CF2-B. The second light shielding filter portion CF2-B is arranged adjacent to the second main filter portion CF2-M. The second filter CF2 does not include a sub-filter portion.

[0124] The first main filter section CF1-M, the second main filter section CF2-M, and the third main filter section CF3-M are portions corresponding to the first light-emitting region PXA-R, the second light-emitting region PXA-G, and the third light-emitting region PXA-B, respectively. The first sub-filter section CF1-S and the third sub-filter section CF3-S are portions corresponding to the first reflection region RA-R and the second reflection region RA-B.

[0125] The light-shielding layer BML includes a light-shielding portion BM, a main opening OH-M, and a sub-opening OH-S. The light-shielding portion BM overlaps with the light-shielding filter portions CF1-B, CF2-B, and CF3-B of the color filter layer CFL. The light-shielding portion BM does not overlap with the main filter portions CF1-M, CF2-M, CF3-M and the sub-filter portions CF1-S, CF3-S of the color filter layer CFL.

[0126] FIG. 7 is a graph showing the evaluation results of the reflectance by wavelength for the comparative example and the present embodiment (example). In FIG. 7, the present embodiment (example) is the evaluation result for the display device DS of an embodiment of the present invention having the structure of the cross-sectional view shown in FIG. 6, and the comparative example is different from the display device DS of an embodiment of the present invention shown in FIG. 6, and is the evaluation result when the sub-opening OH-S is not defined in the light-shielding layer BML.

[0127] Referring to the graph of FIG. 7, in the case of the present embodiment (example), a higher reflectance is shown in the wavelength region near 450 nm and the wavelength region near 650 nm than in the comparative example. That is, referring to the results of FIG. 7, in the case of the present embodiment (example), the reflectance in the blue light-emitting region near 450 nm and the red light-emitting region near 650 nm is increased compared to the comparative example, and it can be seen that the yellowish reflected color feeling is improved compared to the display device of the comparative example.

[0128] Table 1 shows the results of comparing the display quality of the display devices of the present embodiment (example) and the comparative example.

[0129]

Table 1

[0130] In Table 1, the area ratio of the light-emitting region indicates the area ratio of each light-emitting region when the total area of the display region DA (Fig. 2) including the light-emitting regions PXA-R, PXA-G, PXA-B, and the non-light-emitting region NPXA is set to 100%. The non-light-emitting region area ratio indicates the ratio of the areas of the filters CF1 and CF3 exposed in the non-light-emitting region NPXA. That is, the non-light-emitting region area ratio indicates the area ratio of each of the reflection regions RA-R and RA-B, which are the regions of the filters exposed by the sub-apertures OH-S, when the total area of the display region DA (Fig. 2) including the light-emitting regions PXA-R, PXA-G, PXA-B, and the non-light-emitting region NPXA is set to 100%.

[0131] On the other hand, in the case of this embodiment (example), the reflectance slightly increases compared to the comparative example. In the display device of this embodiment (example) compared to the comparative example, the areas of the first reflection region RA-R and the second reflection region RA-B are increased, and the SCE color coordinates (x, y) indicating the reflected color sensation change from (0.305, 0.381) to (0.295, 0.313), indicating that the reflected light has changed from yellowish reflected light to neutral-colored reflected light.

[0132] That is, in the display device DS of this embodiment, a part of the color filter is exposed in the non-light-emitting region by the sub-apertures defined in the light-shielding layer corresponding to the non-light-emitting region, so that the reflected color sensation due to external light is improved by the light reflected by the exposed color filter. Further, by adjusting the area of the exposed color filter without changing the driving method of the organic electroluminescent element in the display panel, the display quality of the display device is improved.

[0133] Hereinafter, with reference to the drawings of FIGS. 8 to 19, the display device of this embodiment will be described. In the description of the display device according to an embodiment of the present invention in FIGS. 8 and 19, the content overlapping with that described in FIGS. 1 to 6 above will not be described again, and the description will focus on the different content.

[0134] FIG. 8 is a cross-sectional view showing a display device DS-a according to an embodiment of the present invention, FIG. 9 is a plan view showing a part of the display device according to an embodiment of the present invention, and FIG. 10 is a cross-sectional view showing a part of the display device according to an embodiment of the present invention.

[0135] FIG. 8 is a cross-sectional view showing a display device DA-a of the present embodiment corresponding to a part of the cross-section of the display device DS of the embodiment of the present invention shown in FIG. 3. The display device DS-a of the embodiment of the present invention shown in FIG. 8 includes a display panel DP, a color conversion layer CCL disposed on the display panel DP, a light shielding layer BML disposed on the display panel DP, and a color filter layer CFL-a disposed on the color conversion layer CCL.

[0136] In the display device DS-a according to the embodiment of the present invention shown in FIG. 8, regarding the display panel DP, the color conversion unit CCL, and the light shielding layer BML, the same contents as those shown in FIG. 3 described above are applied. In the display device DS-a according to the present embodiment, the color conversion unit CCL includes first to third color conversion units CCL1, CCL2, and CCL3.

[0137] In the present embodiment, the color filter layer CFL-a includes a third filter CF3 and a fourth filter CF4. The third filter CF3 overlaps with the third color conversion unit CCL3, and the fourth filter CF4 overlaps with the first color conversion unit CCL1 and the second color conversion unit CCL2.

[0138] The third filter CF3 transmits blue light, which is the first color light. The third filter CF3 includes a blue pigment. Also, differently, the third main filter portion CF3-M may be a transparent filter.

[0139] The fourth filter CF4 transmits fourth color light. The fourth color light is yellow light. That is, the fourth filter CF4 is a yellow filter. The fourth filter CF4 overlaps with the first color conversion unit CCL1 and the second color conversion unit CCL2 and is provided integrally.

[0140] FIG. 9 is a plan view showing a part of the display device DS-a according to an embodiment of the present invention shown in FIG. 8. FIG. 9 is a plan view showing a part AA-a of the display device DA-a of the present embodiment corresponding to a part of the display device DS of the embodiment of the present invention shown in FIG. 5.

[0141] Referring to FIG. 9, a main opening OH-M and a sub-opening OH-S are defined in the light shielding layer BML. When viewed from the plane defined by the first direction axis DR1 and the second direction axis DR2, in the main opening OH-M, the main filter portions CF4-RM, CF4-GM, and CF3-M are exposed, and in the sub-opening OH-S, the sub-filter portions CF4-S and CF3-S are exposed.

[0142] The fourth main filter portions CF4-RM and CF4-GM that are exposed in the main opening OH-M and are non-overlapping with the light shielding portion BM are yellow filters. The third main filter portion CF3-M that is exposed in the main opening OH-M and is non-overlapping with the light shielding portion BM is a blue filter.

[0143] Also, the fourth sub-filter portion CF4-S that is exposed in the sub-opening OH-S and is non-overlapping with the light shielding portion BM is a yellow filter, and the third sub-filter portion CF3-S that is exposed in the sub-opening OH-S and is non-overlapping with the light shielding portion BM is a blue filter.

[0144] FIG. 10 is a cross-sectional view showing a part of the display device DS-a according to an embodiment of the present invention shown in FIG. 8. FIG. 10 is a cross-sectional view showing a part of the display device DS-a of the present embodiment corresponding to the display device DS of the embodiment of the present invention shown in FIG. 6. In the cross-sectional view of FIG. 10, while showing a part of the display device DS-a, for convenience of explanation, the configuration of the display panel DP is shown omitted.

[0145] The display device DS-a of the present embodiment shown in FIG. 10 has a difference in the configuration of the color filter layer CFL-a compared to the display device DS of the present embodiment shown in FIG. 6 described above. Referring to FIG. 10, the fourth filter CF4 includes a fourth main filter portion CF4-RM, CF4-GM, a fourth light-shielding filter portion CF4-B adjacent to the fourth main filter portions CF4-RM, CF4-GM, and a fourth sub-filter portion CF4-S separated from the fourth main filter portion CF4-RM.

[0146] The fourth main filter portions CF4-RM, CF4-GM are portions corresponding to the first light-emitting region PXA-R and the second light-emitting region PXA-G. The fourth sub-filter portion CF4-S is a portion corresponding to the sub-opening OH-S defined in the light-shielding layer BML.

[0147] In the display device DS-a of an embodiment of the present invention shown in FIG. 10, the third filter CF3 includes a third main filter portion CF3-M, a third light-shielding filter portion CF3-B adjacent to the third main filter portion CF3-M, and a third sub-filter portion CF3-S separated from the third main filter portion CF3-M. The third main filter portion CF3-M is a portion corresponding to the third light-emitting region PXA-B. The third sub-filter portion CF3-S is a portion corresponding to the sub-opening OH-S defined in the light-shielding layer BML.

[0148] On the other hand, in the display device DS-a of an embodiment of the present invention shown in FIG. 10, the same content as that described for the display device DS of an embodiment of the present invention described in FIG. 6 above is applicable to the color conversion portions CCL1, CCL2, CCL3.

[0149] FIG. 11 is a cross-sectional view showing a display device DS-b of an embodiment of the present invention, and FIGS. 12 and 13 are cross-sectional views each showing a part of the display device DS-b of an embodiment of the present invention. On the other hand, in the cross-sectional view of FIG. 13, while showing a part of the display device DS-b, for convenience of explanation, the configuration of the display panel DP is shown omitted.

[0150] The display device DS-b of an embodiment of the present invention shown in FIGS. 11 to 13 includes a display panel DP, a color conversion layer CCL disposed on the display panel DP, a light-shielding layer BML disposed on the display panel DP, and a color filter layer CFL disposed on the color conversion layer CCL. On the other hand, in the display device DS-b of the present embodiment, the light-shielding layer BML is provided above the color conversion portion CCL. That is, compared with the display device DS of the embodiment of the present invention described with reference to FIGS. 3 to 6, in the display device DS-b of the present embodiment shown in FIGS. 11 to 13, there is a difference in that the light-shielding layer BML is disposed adjacent to the base substrate BS. The light-shielding portion BM of the light-shielding layer BML is disposed between the filters CF1, CF2, and CF3. Further, the light-shielding layer BML is covered with the color filter layer CFL.

[0151] Referring to the cross-sectional views of FIGS. 12 and 13, in the display device DS-b of the present embodiment, the color conversion portion CCL is disposed above the display panel DP, the color filter layer CFL is disposed above the color conversion portion CCL, and the light-shielding layer BML is disposed above the color filter layer CFL.

[0152] In the display device DS-b of the present embodiment, the color conversion layer CCL includes a first color conversion portion CCL1 disposed corresponding to the first light-emitting region PXA-R, a second color conversion portion CCL2 disposed corresponding to the second light-emitting region PXA-G, and a third color conversion portion CCL3 disposed corresponding to the third light-emitting region PXA-B.

[0153] The color filter layer CFL is disposed on the color conversion layer CCL. The color filter layer CFL includes first to third filters CF1, CF2, and CF3. The boundary between the adjacent filters CF1, CF2, and CF3 overlaps with the light-shielding portion BM.

[0154] The first filter CF1 includes a first main filter section CF1-M, a first light-shielding filter section CF1-B adjacent to the first main filter section CF1-M, and a first sub-filter section CF1-S spaced apart from the first main filter section CF1-M. The third filter CF3 includes a third main filter section CF3-M, a third light-shielding filter section CF3-B adjacent to the third main filter section CF3-M, and a third sub-filter section CF3-S spaced apart from the third main filter section CF3-M.

[0155] On the other hand, the second filter CF2 includes a second main filter section CF2-M and a second light-shielding filter section CF2-B. The second light-shielding filter section CF2 is disposed adjacent to the second main filter section CF2-M. The second filter CF2 does not include a sub-filter section.

[0156] The light-shielding layer BML includes a light-shielding portion BM, a main opening OH-M, and a sub-opening OH-S. The light-shielding portion BM overlaps with the light-shielding filter sections CF1-B, CF2-B, CF3-B of the color filter layer CFL. The light-shielding portion BM does not overlap with the main filter sections CF1-M, CF2-M, CF3-M and the sub-filter sections CF1-S, CF3-S of the color filter layer CFL. The light-shielding portion BM is disposed between the main filter sections CF1-M, CF2-M, CF3-M and between the main filter sections CF1-M, CF3-M and the sub-filter sections CF1-S, CF3-S.

[0157] The manufacturing method of the display device DS-b according to an embodiment of the present invention shown in FIGS. 11 to 13 is performed, for example, in the order of forming a light-shielding layer BML on a base substrate BS and forming a color filter layer CFL on the provided light-shielding layer BML. That is, after providing a light-shielding substance on the base substrate BS, a light-shielding layer BML in which the main opening OH-M and the sub-opening OH-S are defined is formed, and a plurality of filters CF1, CF2, CF3 are sequentially provided to form a color filter layer CFL.

[0158] On the other hand, different from this, the manufacturing method of the display device DS of an embodiment of the present invention shown in FIGS. 3 to 6 is, for example, a step of forming a color filter layer CFL on a base substrate BS, a step of forming a light shielding layer BML on the color filter layer CFL, and a step of forming a color conversion layer CCL on the color filter layer CFL, which are performed in this order. That is, after forming the color filter layer CFL by sequentially providing a plurality of filters CF1, CF2, CF3 on the base substrate BS, a light shielding substance is provided on the color filter layer CFL to define the main opening OH-M and the sub-opening OH-S, thereby forming the light shielding layer BML. Next, the first to third color conversion portions CCL1, CCL2, CCL3 are formed between the light shielding portions BM.

[0159] On the other hand, the manufacturing methods of the display devices DS and DS-b of an embodiment of the present invention described above are exemplary, and the manufacturing method is not limited thereto.

[0160] FIG. 14 is a cross-sectional view showing the display device DS-c of an embodiment of the present invention. The display device DS-c of an embodiment of the present invention shown in FIG. 14 has a difference in the configuration of the color filter layer CFL-C compared to the display device DS-b of an embodiment of the present invention shown in FIG. 13.

[0161] In the display device DS-c of an embodiment of the present invention shown in FIG. 14, the color filter layer CFL-C includes a third filter CF3 and a fourth filter CF4. The third filter CF3 overlaps with the third color conversion portion CCL3, and the fourth filter CF4 overlaps with the first color conversion portion CCL1 and the second color conversion portion CCL2.

[0162] The third filter CF3 transmits blue light, which is the first color light. The third filter CF3 contains a blue pigment. Alternatively, different from this, the third filter portion CF3 may be a transparent filter. The fourth filter CF4 transmits the fourth color light. The fourth color light is yellow light. That is, the fourth filter CF4 is a yellow filter. The fourth filter CF4 overlaps with the first color conversion portion CCL1 and the second color conversion portion CCL2 and is provided integrally.

[0163] In the light-shielding layer BML, a main opening OH-M and a sub-opening OH-S are defined. A light-shielding portion BM is provided between the main openings OH-M and between the main opening OH-M and the sub-opening OH-S.

[0164] The fourth filter CF4 includes a fourth main filter portion CF4-RM, CF4-GM that is not overlapped with the light-shielding portion BM and is exposed at the main opening OH-M, a fourth sub-filter portion CF4-S that is not overlapped with the light-shielding portion BM and is exposed at the sub-opening OH-S, and a fourth light-shielding filter portion CF4-B that overlaps with the light-shielding portion BM.

[0165] The third filter CF3 includes a third main filter portion CF3-M that is not overlapped with the light-shielding portion BM and is exposed at the main opening OH-M, a third sub-filter portion CF3-S that is not overlapped with the light-shielding portion BM and is exposed at the sub-opening OH-S, and a third light-shielding filter portion CF3-B that overlaps with the light-shielding portion BM.

[0166] FIGS. 15 and 16 are cross-sectional views showing a display device DS-d according to an embodiment of the present invention. FIG. 15 is a cross-sectional view showing a display device DS-d according to an embodiment of the present invention corresponding to the cross-section of the display device DS of the embodiment of the present invention shown in FIG. 3, and FIG. 16 is a cross-sectional view showing a portion corresponding to the cross-section of the display device DS of the embodiment of the present invention shown in FIG. 6. The display device DS-d according to the embodiment of the present invention shown in FIGS. 15 to 16 includes a display panel DP, a color conversion layer CCL-d disposed on the display panel DP, a color filter layer CFL-d disposed on the color conversion layer CCL-d, and a light-shielding layer BML disposed on the color conversion layer CCL-d.

[0167] Regarding the display panel DP, the same content as that described in FIGS. 3 to 6 above is applicable. The display panel DP includes a display element layer DP-OEL, and the display panel DP provides the first color light emitted from the display element layer DP-OEL to the color conversion layer CCL-d.

[0168] The color conversion unit CCL-d includes a first color conversion unit CCL1, a second color conversion unit CCL2, and a third color conversion unit CCL3-d. The first color conversion unit CCL1 includes a first quantum dot QD1 that converts a first color light into a second color light, and the second color conversion unit CCL1 includes a second quantum dot QD2 that converts the first color light into a third color light. The third color conversion unit CCL3-d transmits the first color light. The first to third color conversion units CCL1, CCL2, CCL3-d further include a scattering agent SP.

[0169] The display device DS-d of the present embodiment includes a color filter layer CFL-d including a first filter CF1 and a second filter CF2. In the present embodiment, the first filter CF1 is a red filter and the second filter CF2 is a green filter.

[0170] The color filter layer CFL-d includes a third filter CF3-d. In the present embodiment, the third filter CF3-d and the third color conversion unit CCL3-d are provided integrally. The third filter CF3-d and the third color conversion unit CCL3-d include a matrix portion MX and a scattering agent SP dispersed in the matrix portion MX. Further, the third filter CF3-d and the third color conversion unit CCL3-d provided integrally further include a blue pigment.

[0171] The third filter CF3-d provided integrally with the third color conversion unit CCL3-d includes a third main filter portion CF3-M, a third sub-filter portion CF3-S, and a third light-shielding filter portion CF3-B. On the other hand, the same contents as those described in FIGS. 3 to 6 described above are applied to the first filter CF1 and the second filter CF2.

[0172] FIGS. 17 and 18 are plan views showing display devices DS-1 and DS-2 according to an embodiment of the present invention, respectively. FIG. 19 is a cross-sectional view of a display device according to an embodiment of the present invention showing a portion corresponding to line IV-IV' in FIG. 18.

[0173] The display devices DS-1 and DS-2 according to an embodiment of the present invention shown in FIGS. 17 to 18 have a difference in the configuration of the light-emitting region compared to the display device DS described with reference to FIG. 2 and the like above.

[0174] Referring to FIG. 17, the display device DS-1 of the present embodiment includes a light-emitting region PXA-1 and a non-light-emitting region NPXA adjacent thereto. The non-light-emitting region NPXA includes a reflection region RA and a light-shielding region BA.

[0175] The light-emitting region PXA-1 includes first to third light-emitting regions PXA-R1, PXA-G1, and PXA-B1. In the display device DS-1 of the present embodiment, the areas of the first to third light-emitting regions PXA-R1, PXA-G1, and PXA-B1 are different from each other. On the other hand, in this specification, the area of the light-emitting region indicates the area on the plane defined by the first direction axis DR1 and the second direction axis DR2.

[0176] In the display device DS-1 according to an embodiment of the present invention shown in FIG. 17, the area of the first light-emitting region PXA-R1 is larger than the areas of the second light-emitting region PXA-G1 and the third light-emitting region PXA-B1, respectively. Also, in the display device DS-1 of the present embodiment, the area of the first light-emitting region PXA-R1 is larger than the area of the second light-emitting region PXA-G1, and the area of the second light-emitting region PXA-G1 is larger than the area of the third light-emitting region PXA-B1.

[0177] The width W1 in the direction of the first direction axis DR1 of the first light-emitting region PXA-R1 is larger than the width W2 in the direction of the first direction axis DR1 of the second light-emitting region PXA-G1 and the width W3 in the direction of the first direction axis DR1 of the third light-emitting region PXA-B1. Or, in the present embodiment, the width W1 in the direction of the first direction axis DR1 of the first light-emitting region PXA-R1 is larger than the width W2 in the direction of the first direction axis DR1 of the second light-emitting region PXA-G1, and the width W2 in the direction of the first direction axis DR1 of the second light-emitting region PXA-G1 is larger than the width W3 in the direction of the first direction axis DR1 of the third light-emitting region PXA-B1.

[0178] That is, in the display device DS-1 of the present embodiment, the area of the red light-emitting region, which is the first light-emitting region PXA-R, is larger than the area of the green light-emitting region, which is the second light-emitting region PXA-G, and the area of the blue light-emitting region, which is the third light-emitting region PXA-B.

[0179] However, the ratio of the areas of the first to third light-emitting regions PXA-R1, PXA-G1, and PXA-B1 is not limited to the illustration in FIG. 17, and the ratio of the areas of the first to third light-emitting regions PXA-R1, PXA-G1, and PXA-B1 may be variously adjusted according to the display color perception required by the display device DS-1 of the present embodiment.

[0180] Referring to FIG. 18, the display device DS-2 of the present embodiment includes a light-emitting region PXA-2 and a non-light-emitting region NPXA adjacent thereto. The non-light-emitting region NPXA includes a reflection region RA and a light-shielding region BA.

[0181] The light-emitting region PXA-2 includes first to fourth light-emitting regions PXA-R, PXA-G, PXA-B2, and PXA-W. In the display device DS-2 of the present embodiment, it further includes a fourth light-emitting region PXA-W as compared with the display device DS of an embodiment of the present invention shown in FIG. 2.

[0182] The fourth light-emitting region PXA-W is a portion that provides light in a wavelength region different from those of the first to third light-emitting regions PXA-R, PXA-G, and PXA-B2. The first light-emitting region PXA-R is a red light-emitting region, the second light-emitting region PXA-G is a green light-emitting region, and the third light-emitting region PXA-B is a blue light-emitting region. For example, the fourth light-emitting region PXA-W may be a white light-emitting region that emits white light.

[0183] On the other hand, in the display device DS-2 of an embodiment of the present invention shown in FIG. 18, the third light-emitting region PXA-B and the fourth light-emitting region PXA-W are shown to be arranged intersecting in the direction of the second direction axis DR2. However, this embodiment is not limited thereto, and the first to fourth light-emitting regions PXA-R, PXA-G, PXA-B2, and PXA-W may be aligned in the direction of the first direction axis DR1. On the other hand, different from the illustration, the areas of the third light-emitting region PXA-B2 and the fourth light-emitting region PXA-W are substantially the same as the areas of the first light-emitting region PXA-R and the second light-emitting region PXA-G.

[0184] FIG. 19 is a diagram showing a cross-section corresponding to the line IV-IV' in FIG. 18. The display device DS-2 of this embodiment includes a display panel DP, a color conversion layer CCL-2 disposed on the display panel DP, a light-shielding layer BML disposed on the display panel DP, and a color filter layer CFL-2 disposed on the color conversion layer CCL-2.

[0185] The display panel DP provides first color light. The display panel DP provides blue light, which is the first color light, to the color conversion layer CCL-2.

[0186] The color conversion layer CCL-2 further includes a fifth color conversion part CCL5 in addition to the first color conversion part CCL1, the second color conversion part CCL2, and the third color conversion part CCL3. The first color conversion part CCL1 wavelength-converts the first color light and emits red light, which is the second color light, and the second color conversion part CCL2 wavelength-converts the first color light and emits green light, which is the third color light. The third color conversion part CCL3 is a part that transmits the first color light and emits blue light.

[0187] The fifth color conversion part CCL5 is a part that emits white light. For example, the fifth color conversion part CCL5 may include all of the red quantum dots and green quantum dots that are wavelength-converted by blue light, which is the first color light.

[0188] The color filter layer CFL-2 includes a fifth filter CF5. The fifth filter CF5 is a transparent filter. The fifth filter CF5 includes a fifth main filter portion CF5-M and a fifth light-shielding filter portion CF5-B. The fifth filter CF5 transmits white light provided from the fifth color conversion portion CCL5. On the other hand, for the first to third filters CF1, CF2, CF3, the same content as that described in the display device DS of the present embodiment described above is applicable.

[0189] In the display devices DS, DS-1, DS-2 according to an embodiment of the present invention shown and described in FIGS. 2, 17, and 18, each light-emitting region PXA-R, PXA-G, PXA-B, PXA-R1, PXA-G1, PXA-B1, PXA-B2, PXA-W is shown in a rectangular shape, but the present embodiment is not limited thereto, and the shape of each light-emitting region may be variously deformed.

[0190] On the other hand, in FIGS. 2, 7, and 18, it is shown that light-emitting regions that emit light of the same color from each light-emitting region PXA, PXA-1, PXA-2 of the display devices DS, DS-1, DS-2 according to an embodiment of the present invention are arranged in a stripe shape. However, the present embodiment is not limited thereto, and each light-emitting region PXA may be arranged in a pentile structure.

[0191] The display device according to an embodiment of the present invention includes a color filter layer disposed on a display panel, and shows improved display quality by exposing a part of the filters of the color filter layer in a part of the non-light-emitting region. The display device according to an embodiment of the present invention includes a light-shielding layer having a main opening defined corresponding to a light-emitting region and a sub-opening defined corresponding to a part of the non-light-emitting region, and adjusts the color sense of reflected light by external light by partially exposing the color filter layer in a part of the non-light-emitting region.

[0192] Further, the display device according to an embodiment of the present invention shows excellent display quality by adjusting the region of the color filter layer exposed in the non-light-emitting region and adjusting the reflected color sense without changing the driving method for the display panel.

[0193] Although the preferred embodiments of the present invention have been described, those skilled in the relevant technical field or those with ordinary knowledge in the relevant technical field should understand that the present invention can be variously modified and changed without departing from the spirit and technical scope of the present invention described in the claims to be described later.

[0194] Therefore, the technical scope of the present invention is not limited to the content described in the detailed description of the specification and should be determined by the claims.

Description of Reference Numerals

[0195] DS, DS-1, DS-2, DS-a, DS-b, DS-c, DS-d: Display device, DP: Display panel, CCL: Color conversion layer, CFL: Color filter layer, BML: Light-shielding layer, OH-M: Main opening, OH-S: Sub opening, BM: Light-shielding portion

Claims

1. A display panel having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, A color conversion layer disposed on the display panel, A light-shielding layer disposed on the display panel and defining a main opening corresponding to the light-emitting region and a sub-opening corresponding to the non-light-emitting region, A color filter layer disposed on the color conversion layer, including: The color filter layer includes: A main filter portion corresponding to the main opening, A sub-filter portion corresponding to the sub-opening, A light-shielding filter portion corresponding to the non-light-emitting region and non-overlapping with the sub-opening, The display panel includes an organic electroluminescent element that emits first color light, The color conversion layer includes a first color conversion portion that converts the first color light into second color light, A second color conversion portion that converts the first color light into third color light, A third color conversion portion that transmits the first color light, The color filter layer includes: A first filter that transmits the second color light, A second filter that transmits the third color light, A third filter that transmits the first color light, The first filter to the third filter each include the main filter portion and the light-shielding filter portion, The first color light is blue light, the second color light is red light, and the third color light is green light, The display device in which the first filter and the third filter include the sub-filter portion, and the second filter does not include the sub-filter portion.

2. The display device according to claim 1, wherein the first color conversion portion includes first quantum dots, The second color conversion portion includes second quantum dots.

3. A display panel having a light-emitting region and a non-light-emitting region adjacent to the light-emitting region, A color conversion layer disposed on the display panel, A light-shielding layer disposed on the display panel and defining a main opening corresponding to the light-emitting region and a sub-opening corresponding to the non-light-emitting region, A color filter layer disposed on the color conversion layer, including: The color filter layer includes: A main filter portion corresponding to the main opening, A sub-filter portion corresponding to the sub-opening, A light-shielding filter portion corresponding to the non-light-emitting region and non-overlapping with the sub-opening, The display panel includes an organic electroluminescent element that emits first color light, The color conversion layer includes a first color conversion portion that converts the first color light into second color light, A second color conversion portion that converts the first color light into third color light, ​ a third color conversion unit that transmits the first color light; The color filter layer a third filter that overlaps with the third color conversion unit and transmits the first color light; A display device including a fourth filter that overlaps with the first color conversion unit and the second color conversion unit and transmits fourth color light. **Claim 4** The first color conversion unit includes first quantum dots, The display device according to claim 3, wherein the second color conversion unit includes second quantum dots. **Claim 5** In a display device including a light emitting region, a reflection region spaced apart from the light emitting region on a plane, and a light shielding region surrounding the light emitting region and the reflection region, a display panel including an organic electroluminescent element; a color conversion layer disposed on the display panel and including a plurality of color conversion units disposed corresponding to the light emitting region; a color filter layer disposed on the color conversion layer and including a plurality of filters; a light shielding layer disposed on the display panel, overlapping with the light shielding region and including a light shielding portion that does not overlap with the light emitting region and the reflection region; The light emitting region includes a red light emitting region, a green light emitting region, and a blue light emitting region, The reflection region includes a red reflection region and a blue reflection region, The organic electroluminescent element emits blue light, The color conversion unit a first color conversion unit disposed corresponding to the red light emitting region; a second color conversion unit disposed corresponding to the green light emitting region; a third color conversion unit disposed corresponding to the blue light emitting region; **Claim 6** The first color conversion unit includes red quantum dots, The display device according to claim 5, wherein the second color conversion unit includes green quantum dots. **Claim 7** In a display device including a light emitting region, a reflection region spaced apart from the light emitting region on a plane, and a light shielding region surrounding the light emitting region and the reflection region, a display panel including an organic electroluminescent element; a color conversion layer disposed on the display panel and including a plurality of color conversion units disposed corresponding to the light emitting region; a color filter layer disposed on the color conversion layer and including a plurality of filters; a light shielding layer disposed on the display panel, overlapping with the light shielding region and including a light shielding portion that does not overlap with the light emitting region and the reflection region; The light emitting region includes a red light emitting region, a green light emitting region, and a blue light emitting region, The reflection region includes a red reflection region and a blue reflection region, The filter a red filter that overlaps with the red light emitting region and the red reflection region; A green filter that overlaps with the green light-emitting region, A display device including a blue filter that overlaps with the blue light-emitting region and the blue reflection region.

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