Display device

Abstract

The present disclosure relates to a display device including: a display section having a plurality of light emitting regions and a non-light emitting region between adjacent light emitting regions among the plurality of light emitting regions; and a color conversion portion overlapping the display portion, in which the color conversion portion includes: a first substrate including a first surface facing the display portion; and a color filter layer on the first surface of the first substrate and including a plurality of color filters, and wherein the color filter layer has a color filter opening from which the color filter layer is removed at at least a portion of the non-emission region.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2023 - 0128595, filed with the Korean Intellectual Property Office on September 25, 2023, the entire disclosure of which is incorporated herein by reference. Technical field

[0003] Aspects of some embodiments of the present disclosure relate to a display device. Background art

[0004] A light - emitting device is a device that emits light when excitons are formed by the combination of holes supplied from an anode and electrons supplied from a cathode in a light - emitting layer formed between the anode and the cathode and the excitons are stabilized.

[0005] Light - emitting devices can have various advantages such as a relatively wide viewing angle, a relatively fast response speed, thinness, and low power consumption, and thus they can be widely applied to various electrical and electronic devices such as televisions, monitors, and mobile phones.

[0006] An efficient display device can be implemented using a display device including a color conversion layer. The color conversion layer can convert incident light into light of different colors.

[0007] The above information disclosed in this background art section is only for enhancing the understanding of the background art, and thus the information discussed in this background art section does not necessarily constitute the prior art. Summary of the utility model

[0008] Aspects of some embodiments can relatively improve the display quality by reducing the external light reflectance on the display device.

[0009] A display device according to some embodiments includes: a display portion having a plurality of light - emitting regions and non - light - emitting regions between adjacent light - emitting regions; and a color conversion portion overlapping the display portion, wherein the color conversion portion includes: a first substrate including a first surface facing the display portion; and a color filter layer on the first surface of the first substrate and including a plurality of color filters, and wherein the color filter layer has color filter openings where at least a part of the color filter layer is removed in the non - light - emitting regions.

[0010] According to some embodiments, the color conversion portion further includes a bank layer between the first substrate and the display portion, and the bank layer may have openings corresponding to the light - emitting regions.

[0011] According to some embodiments, the bank layer may contact the first surface of the first substrate through the color filter openings.

[0012] According to some embodiments, at least two of the plurality of color filters may overlap each other in a non-emitting region to form an overlapping portion.

[0013] According to some embodiments, the color filter opening may be defined by an edge of the overlapping portion.

[0014] According to some embodiments, the bank layer includes a first bank portion overlapping the overlapping portion and a second bank portion not overlapping the overlapping portion, and the second bank portion contacts a first surface of the first substrate in the non-emitting region.

[0015] According to some embodiments, the display device may further include a filling layer between the bank layer and the display portion.

[0016] According to some embodiments, the bank layer may be removed from the non-emitting region to form a bank opening.

[0017] According to some embodiments, the display device may further include a filling layer between the first substrate and the display portion, and the filling layer may contact the first surface of the first substrate through the bank opening.

[0018] According to some embodiments, the filling layer includes a first filling portion overlapping the light-emitting region and a second filling portion overlapping the non-emitting region, and the second filling portion may contact the first surface of the first substrate.

[0019] According to some embodiments, the display portion includes a second substrate, a plurality of light-emitting devices on the second substrate, and a packaging portion on the light-emitting devices, the bank layer is formed on the packaging portion, and the display device may further include a filling layer between the bank layer and the first substrate.

[0020] According to some embodiments, the filling layer may contact the first surface of the first substrate through the color filter opening.

[0021] According to some embodiments, at least two of the plurality of color filters may overlap in the non-emitting region to form an overlapping portion, and the color filter opening may be defined by an edge of the overlapping portion.

[0022] According to some embodiments, the filling layer includes a first filling portion overlapping the light-emitting region and a second filling portion overlapping the non-emitting region, and the second filling portion may contact the first surface of the first substrate.

[0023] According to some embodiments, at least two of the plurality of color filters may overlap in the non-emitting region to form an overlapping portion, and the display device may further include a light-blocking layer overlapping the overlapping portion and located between the color filter layer and the first substrate.

[0024] A display device according to some embodiments includes: a display portion having a plurality of light-emitting regions and non-light-emitting regions between adjacent light-emitting regions; a color conversion portion overlapping with the display portion; and a filling layer between the display portion and the color conversion portion, wherein the color conversion portion includes a first substrate including a first surface facing the display portion, and a bank layer between the first substrate and the display portion, and the bank layer or the filling layer is in contact with the first surface of the first substrate.

[0025] According to some embodiments, the color conversion portion may further include a color filter layer including a plurality of color filters on the first surface of the first substrate, and the color filter layer may have color filter openings in the non-light-emitting regions.

[0026] According to some embodiments, the bank layer or the filling layer may be in contact with the first surface of the first substrate through the color filter openings.

[0027] According to some embodiments, the display quality is relatively improved by reducing the external light reflectance on the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a plan view of a display device according to some embodiments.

[0029] Figure 2 is a cross-sectional view of a display device according to some embodiments.

[0030] Figure 3 is a plan view of a display area of a display device according to some embodiments.

[0031] Figure 4 is a cross-sectional view of a display area of a display device according to some embodiments.

[0032] Figure 5 is Figure 4 an enlarged view of a part of the cross-sectional view of the display device shown in

[0033] Figure 6 is a cross-sectional view of a display area of a display device according to some embodiments.

[0034] Figure 7 is Figure 6 an enlarged view of a part of the cross-sectional view of the display device shown in

[0035] Figure 8 is a cross-sectional view of a display area of a display device according to some embodiments.

[0036] Figure 9 is a cross-sectional view of a display area of a display device according to some embodiments. DETAILED DESCRIPTION

[0037] In the following, aspects of some embodiments of the present invention will be described in more detail with reference to the accompanying drawings, so that those skilled in the art can relatively easily implement the present invention.

[0038] The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0039] To more clearly explain aspects of some embodiments of the present invention, parts irrelevant to the description are omitted, and the same or similar components are given the same reference numerals throughout the description.

[0040] In addition, for the sake of explanation, the dimensions and thicknesses of each component shown in the drawings are arbitrarily shown, so the present invention is not necessarily limited to what is shown.

[0041] In the drawings, the thicknesses are enlarged to clearly show various layers and regions.

[0042] And in the drawings, for the sake of explanation, the thicknesses of some layers and regions are exaggerated.

[0043] In addition, when a part of a layer, film, region, or plate is referred to as being "above" or "on" another part, this includes not only the case where it is "directly" above the other part, but also the case where there is another part between them.

[0044] Conversely, when a part is referred to as being "directly on top of" another part, this means that there are no other parts between them.

[0045] In addition, being "above" or "on" in the reference part means being located above or below the reference part, and not necessarily meaning being "above" or "on" it in the direction opposite to gravity.

[0046] In addition, throughout the description, when a part is referred to as "including" certain components, this means that other components may also be included, rather than excluding other components, unless explicitly stated to the contrary.

[0047] In addition, throughout the description, when referring to "in a plane", this means observing the target part from above, and when referring to "in a cross-section", this means vertically cutting and observing the cross-section of the target part from the side.

[0048] Reference will be made to Figures 1 to 5 The structure of a display device according to some embodiments will be described in more detail.

[0049] Figure 1 is a plan view of a display device according to some embodiments, Figure 2A cross-sectional view of a display device according to some embodiments. Figure 3 A plan view of a display area of a display device according to some embodiments. Figure 4 A cross-sectional view of a display area of a display device according to some embodiments, and Figure 5 is Figure 4 An enlarged view of a part of the cross-sectional view of the display device shown in

[0050] Referring to Figure 1 , according to some embodiments, the display device 1000 includes a display panel 110, and the display panel 110 includes a display area DA capable of displaying an image and a peripheral area PA around the display area DA (e.g., at the periphery or outside the covering area).

[0051] The display area DA includes a plurality of pixels PX as units for displaying an image, and the peripheral area PA may or may not display an image.

[0052] The peripheral area PA may surround the display area DA, but is not limited thereto according to the embodiments of the present disclosure.

[0053] The display area DA may have a display surface parallel to a first direction DR1 and a second direction DR2.

[0054] The normal direction of the display surface on which the image is displayed (i.e., the thickness direction of the display panel 110) may be parallel to a third direction DR3.

[0055] The display panel 110 may be a rigid display panel, but is not limited thereto, and may be a flexible display panel.

[0056] The display panel 110 may be a light-emitting display panel, but the type of the display panel 110 is not limited thereto, and may be various types.

[0057] For example, the display panel 110 may include a micro light-emitting diode display panel, a quantum dot light-emitting diode display panel, a quantum dot organic light-emitting diode display panel, etc.

[0058] Referring to Figure 1 and Figure 2 , according to some embodiments, the display panel 110 includes at least one substrate SUB, and a plurality of pixels PX may be formed on the substrate SUB corresponding to the Figure 1 display area DA of

[0059] The plurality of pixels PX may include a first pixel PA1, a second pixel PA2, and a third pixel PA3 that can display different colors.

[0060] Each pixel PX may include at least one transistor and a light-emitting device connected thereto.

[0061] The encapsulation part ENC can be located on multiple pixels PX.

[0062] The encapsulation part ENC can cover the light-emitting device ED (see Figure 4 ) and protect the light-emitting device ED from external air or moisture.

[0063] The encapsulation part ENC can overlap with the front surface of the display area DA in the direction of the displayed image and can be partially located in the peripheral area PA.

[0064] The first color conversion part CC1, the second color conversion part CC2, and the transmissive part CC3 can be located on the encapsulation part ENC.

[0065] The first color conversion part CC1 overlaps with the third pixel PA3, the second color conversion part CC2 overlaps with the second pixel PA2, and the transmissive part CC3 overlaps with the first pixel PA1.

[0066] The light emitted from the first pixel PA1 can pass through the transmissive part CC3 to provide the first color light LB.

[0067] The light emitted from the second pixel PA2 can pass through the second color conversion part CC2 to provide the second color light LG.

[0068] The light emitted from the third pixel PA3 can pass through the first color conversion part CC1 to provide the third color light LR.

[0069] For example, the first color light LB can be blue light, the second color light LG can be green light, and the third color light LR can be red light, but the displayed colors are not limited to this.

[0070] Refer to Figure 2 and Figure 3 , according to some embodiments, the display area DA can include multiple light-emitting areas corresponding to multiple pixels PX.

[0071] For example, it can include a first light-emitting area LEA1 corresponding to the first pixel PA1, a second light-emitting area LEA2 corresponding to the second pixel PA2, and a third light-emitting area LEA3 corresponding to the third pixel PA3.

[0072] In the display area DA, the non-light-emitting area NLA can be located between the first light-emitting area LEA1, the second light-emitting area LEA2, and the third light-emitting area LEA3.

[0073] In a plan view, each light-emitting area LEA1, LEA2, LEA3 is shown as a square, but may have other shapes such as a rhombus, pentagon, or octagon, and may have various shapes and areas according to embodiments.

[0074] Reference Figure 3 and Figure 4 , the bank layer BNK may be located in at least a part of the non-light-emitting area NLA, and the bank layer BNK may be removed from each light-emitting area LEA1, LEA2, LEA3 to form an opening OPA.

[0075] Each light-emitting area LEA1, LEA2, LEA3 may be positioned corresponding to each opening OPA.

[0076] The bank layer BNK may include an organic material such as an acrylic resin.

[0077] The bank layer BNK may include a light-absorbing material that absorbs light in the visible light wavelength band.

[0078] According to some embodiments, the bank layer BNK may include an organic light-blocking material and serve as a light-blocking layer, and may serve as a barrier rib.

[0079] Reference Figure 4 , a display device 1000 according to some embodiments may include a display part DC and a color conversion part CC in a cross-sectional structure.

[0080] The display part DC may include a first substrate SUB1 and a plurality of transistors and a plurality of light-emitting devices ED formed thereon.

[0081] The first substrate SUB1 includes an insulating material and may include a transparent material.

[0082] For example, the first substrate SUB1 may include glass, quartz, or a plastic such as polyimide.

[0083] The first substrate SUB1 may be a rigid substrate, or may have a flexible property that can be bent, folded, or curled.

[0084] A buffer layer BF may be located on the first substrate SUB1.

[0085] The buffer layer BF may include an inorganic insulating material or an organic insulating material including silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), etc., and may be a single layer or a multi-layer.

[0086] A semiconductor layer ACT may be located on the buffer layer BF.

[0087] The semiconductor layer ACT may include a semiconductor material such as amorphous silicon, polycrystalline silicon, or an oxide semiconductor.

[0088] The semiconductor layer ACT may include a channel region C, a source region S, and a drain region D.

[0089] The source region S and the drain region D may be located on both sides of the channel region C, respectively.

[0090] The channel region C is an intrinsic semiconductor that is not doped with impurities, and the source region S and the drain region D are impurity semiconductors doped with conductive impurities and may have conductivity.

[0091] The gate insulating layer GI may be located on the semiconductor layer ACT.

[0092] The gate insulating layer GI may include an inorganic insulating material or an organic insulating material containing silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and may be a single layer or multiple layers.

[0093] The first conductive layer including the gate electrode GE may be located on the gate insulating layer GI.

[0094] The first conductive layer may include at least one metal or an alloy of metals such as aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and copper (Cu), and it may be a single layer or multiple layers.

[0095] The interlayer insulating layer IL1 may be located on the buffer layer BF, the semiconductor layer ACT, the gate insulating layer GI, and the gate electrode GE.

[0096] The interlayer insulating layer IL1 may include an inorganic insulating material or an organic insulating material containing silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and may be a single layer or multiple layers.

[0097] The second conductive layer including the source electrode SE and the drain electrode DE may be located on the interlayer insulating layer IL1.

[0098] The source electrode SE and the drain electrode DE may be electrically connected to the source region S and the drain region D of the semiconductor layer ACT through contact holes formed in the interlayer insulating layer IL1, respectively.

[0099] The protective layer IL2 may be located on the interlayer insulating layer IL1, the source electrode SE, and the drain electrode DE.

[0100] The protective layer IL2 may cover the interlayer insulating layer IL1, the source electrode SE, and the drain electrode DE and planarize them.

[0101] The protective layer IL2 may include an organic insulating material or an inorganic insulating material such as a polymer derivative, an acrylic polymer, an imide polymer, a polyimide, a polyamide, an acrylic polymer, or a silicone polymer.

[0102] The third conductive layer including the first electrode E1 may be located on the protective layer IL2.

[0103] The first electrode E1 may be electrically connected to the source electrode SE through a contact hole in the protective layer IL2.

[0104] The driving transistor composed of the gate electrode GE, the semiconductor layer ACT, the source electrode SE, and the drain electrode DE may be electrically connected to the first electrode E1 to supply a driving current to the light-emitting device ED described later.

[0105] In addition to the driving transistor, the display device 1000 according to some embodiments may further include a switching transistor and a compensation transistor. The switching transistor is connected to the data line and transmits a data voltage in response to a scan signal. The compensation transistor is connected to the driving transistor and compensates for the threshold voltage of the driving transistor in response to the scan signal.

[0106] The pixel insulating layer PDL may be located on the protective layer IL2 and the first electrode E1.

[0107] The pixel insulating layer PDL may have a pixel opening OP that overlaps the first electrode E1 and defines a light-emitting region.

[0108] The pixel insulating layer PDL may include an organic insulating material such as polyimide, polyamide, acrylic resin, benzocyclobutene, or phenolic resin, or an inorganic insulating material based on silicon dioxide.

[0109] The light-emitting layer EML may be located on the first electrode E1 that overlaps the pixel opening OP.

[0110] The light-emitting layer EML may include a high-molecular-weight organic material or a low-molecular-weight organic material such as poly(3,4-ethylenedioxythiophene) (PEDOT).

[0111] The light-emitting layer EML may include one or more of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), and it may be a multilayer.

[0112] The light-emitting layer EML may be mainly located within the pixel opening OP and may also include portions located on or above the sides of the pixel insulating layer PDL.

[0113] The second electrode E2 may be located on the light-emitting layer EML.

[0114] The second electrode E2 may be formed of a single conductor spanning multiple pixels PX.

[0115] The first electrode E1, the light-emitting layer EML, and the second electrode E2 may together form a light-emitting device ED.

[0116] The first electrode E1 may be an anode as a hole injection electrode, and the second electrode E2 may be a cathode as an electron injection electrode.

[0117] However, embodiments according to the present disclosure are not necessarily limited thereto, and depending on the driving method of the display device 1000, the first electrode E1 may be a cathode and the second electrode E2 may be an anode.

[0118] Holes and electrons are respectively injected into the light-emitting layer EML from the first electrode E1 and the second electrode E2, and light emission occurs when excitons formed by the combination of the injected holes and electrons drop from the excited state to the ground state.

[0119] The encapsulation portion ENC may be located on the second electrode E2.

[0120] The encapsulation portion ENC covers and seals the light-emitting device ED, thereby blocking the inflow of external moisture and oxygen.

[0121] The encapsulation portion ENC may include multiple layers and may be formed of a composite film including alternately stacked inorganic films and organic films.

[0122] For example, the encapsulation portion ENC may include an inorganic layer EIL1, an organic layer EOL, and an inorganic layer EIL2 formed in sequence.

[0123] The color conversion portion CC may be located on the encapsulation portion ENC.

[0124] The color conversion portion CC may include a second substrate SUB2 parallel to and overlapping the first substrate SUB1.

[0125] The second substrate SUB2 includes an insulating material and may include a transparent material.

[0126] For example, the second substrate SUB2 may include glass, quartz, or a plastic such as polyimide.

[0127] The second substrate SUB2 may be a rigid substrate or may have a flexible property that can be bent, folded, or curled.

[0128] The color conversion section CC may include a first color filter CF1, a second color filter CF2, and a third color filter CF3 located between the second substrate SUB2 and the display section DC.

[0129] The color filter layer includes a first color filter CF1, a second color filter CF2, and a third color filter CF3.

[0130] According to some embodiments, the first color filter CF1, the second color filter CF2, and the third color filter CF3 may be formed under the lower surface of the second substrate SUB2.

[0131] The third color filter CF3 may overlap with a first color conversion layer CCL1 to be described later.

[0132] The third color filter CF3 may transmit third color light that has passed through the first color conversion layer CCL1 and absorb light of the remaining wavelengths, thereby increasing the purity of the third color light emitted to the outside of the display device 1000.

[0133] The third color light may be red.

[0134] The second color filter CF2 may overlap with a second color conversion layer CCL2.

[0135] The second color filter CF2 may transmit second color light that has passed through the second color conversion layer CCL2 and absorb light of the remaining wavelengths, thereby increasing the purity of the second color light emitted to the outside of the display device 1000.

[0136] The second color light may be green.

[0137] The first color filter CF1 may overlap with a transmissive layer TL to be described later.

[0138] The first color filter CF1 may transmit first color light that has passed through the transmissive layer TL and absorb light of the remaining wavelengths, thereby increasing the purity of the first color light emitted to the outside of the display device 1000.

[0139] The first color light may be blue.

[0140] Reference Figure 4 and Figure 5 , the color filter layer including the first color filter CF1, the second color filter CF2, and the third color filter CF3 is removed at at least a part of the non-light-emitting area NLA to have a color filter opening COP.

[0141] The color filter opening COP may have an edge that may be located in the non-light-emitting area NLA or at the boundary between the non-light-emitting area NLA and the light-emitting areas LEA1, LEA2, and LEA3.

[0142] Figure 4 and Figure 5 shows an example in which the edge of the color filter opening COP is located within the non-light-emitting region NLA.

[0143] At least two of the first color filter CF1, the second color filter CF2, and the third color filter CF3 are used in a portion of the non-light-emitting region NLA adjacent to the opening OPA of the bank layer BNK. They may overlap to form an overlapping portion CFL, and the overlapping portion CFL may be used as a light-blocking layer.

[0144] The overlapping portion CFL may be positioned around the edge of the opening OPA and may be positioned corresponding to the non-light-emitting region NLA.

[0145] If the overlapping portion CFL exists, the color filter opening COP may be defined by the edge of the overlapping portion CFL.

[0146] The overlapping portion CFL may be omitted.

[0147] When the overlapping portion CFL is omitted, the color filter opening COP may be substantially aligned with the boundary between the non-light-emitting region NLA and the light-emitting regions LEA1, LEA2, and LEA3.

[0148] The non-light-emitting region NLA may overlap with the pixel insulating layer PDL of the display portion DC.

[0149] In a cross-sectional view, the bank layer BNK is located between the first color filter CF1, the second color filter CF2, and the third color filter CF3, the second substrate SUB2, and the display portion DC.

[0150] The bank layer BNK may have an opening OPA that overlaps with the pixel opening OP.

[0151] The opening OPA may correspond to the light-emitting regions LEA1, LEA2, and LEA3 of each pixel.

[0152] The bank layer BNK may overlap with the pixel insulating layer PDL of the display portion DC.

[0153] The opening OPA includes a transmissive layer TL corresponding to the first light-emitting region LEA1, a second color conversion layer CCL2 corresponding to the second light-emitting region LEA2, and a first color conversion layer CCL1 corresponding to the third light-emitting region LEA3.

[0154] The first color conversion layer CCL1 may convert the supplied light into third-color light.

[0155] The first color conversion layer CCL1 may include quantum dots.

[0156] The second color conversion layer CCL2 can convert the supplied light into second color light.

[0157] The second color conversion layer CCL2 can include quantum dots.

[0158] In this specification, quantum dots (also hereinafter referred to as semiconductor nanocrystals) include II-VI group compounds, III-V group compounds, IV-VI group compounds, group IV elements or compounds, I-III-VI group compounds, I-II-IV-VI group compounds, or combinations thereof.

[0159] According to some embodiments, the quantum dots can have a core-shell structure including a core containing nanocrystals and a shell surrounding the core.

[0160] The shell of the quantum dots can be used as a protective layer to maintain semiconductor properties by preventing or reducing chemical denaturation of the core and / or as a charge layer to impart electrophoretic properties to the quantum dots.

[0161] The shell can be a single layer or multiple layers.

[0162] The interface between the core and the shell can have a concentration gradient in which the concentration of elements present in the shell decreases toward the center.

[0163] Examples of the shell of the quantum dots include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0164] The semiconductor nanocrystals can have a structure including a single semiconductor nanocrystal core and multiple layers of shells surrounding the core.

[0165] The quantum dots can control the absorption / emission wavelength by adjusting their composition and size.

[0166] The maximum emission peak wavelength of the quantum dots can be in the range from ultraviolet to infrared wavelengths or longer wavelengths.

[0167] The transmissive layer TL can include a polymer resin and a scatterer included in the polymer resin, and can transmit light incident from the light-emitting device ED.

[0168] The first color conversion layer CCL1 corresponding to the third light-emitting region LEA3 can convert the incident light color into third color light and emit it.

[0169] The second color conversion layer CCL2 corresponding to the second light-emitting region LEA2 can convert the incident light color into second color light and emit it.

[0170] Light incident on the transmissive layer TL corresponding to the first light-emitting region LEA1 can be transmitted without color conversion.

[0171] The incident light can include, for example, first color light.

[0172] In this case, the incident light may be only blue light or a mixture of blue light and green light.

[0173] The incident light may include all blue light, all green light, and all red light.

[0174] The filling layer FLL may be located between the transmissive layer TL, the first color conversion layer CCL1, the second color conversion layer CCL2, the bank layer BNK, and the display portion DC.

[0175] The filling layer FLL is located between the color conversion portion CC and the display portion DC, and may bond them to each other.

[0176] The filling layer FLL may include a filler.

[0177] According to some embodiments, the position of the filling layer FLL may be filled with air.

[0178] The spacer CS may be located between the bank layer BNK and the encapsulation portion ENC.

[0179] The spacer CS may be directly formed on the encapsulation portion ENC or directly formed under the bank layer BNK.

[0180] The spacer CS may maintain the gap between the display portion DC and the color conversion portion CC.

[0181] Reference Figures 3 to 5 , the bank layer BNK may contact the surface of the second substrate SUB2 (e.g., the lower surface of the second substrate SUB2) through the color filter opening COP in the non-emitting region NLA.

[0182] When the color filter layer including the first color filter CF1, the second color filter CF2, and the third color filter CF3 includes an overlapping portion CFL, the bank layer BNK is connected to the overlapping portion CFL, and it may include a first bank portion BNK a overlapping with the overlapping portion CFL and a second bank portion BNK b not overlapping with the overlapping portion CFL.

[0183] The bank layer BNK is not physically separated into the first bank portion BNK a and the second bank portion BNK b, but may be named according to whether it overlaps with the overlapping portion CFL.

[0184] The first bank portion BNK a and the second bank portion BNK b may be integrally formed.

[0185] If the overlapping portion CFL is omitted, the first bank portion BNK a may also be omitted.

[0186] The second bank portion BNKb of the bank layer BNK may contact the second substrate SUB2 in most regions of the non-light-emitting region NLA.

[0187] According to some embodiments, the color filter layer is removed from the non-light-emitting region NLA, and the bank layer BNK contacts the second substrate SUB2, thereby reducing the external light reflectance at the bottom boundary of the second substrate SUB2, and relatively improving the display quality.

[0188] According to the comparative example, the first color filter CF1, the second color filter CF2, and the third color filter CF3 do not include color filter openings COP, such that the color filter layer is formed even in the non-light-emitting region NLA. When the lower surface of the second substrate SUB2 contacts the color filter layer, the reflectance between the lower surface of the second substrate SUB2 and the color filter layer is high. Therefore, the external light reflectance on the second substrate SUB2 side is about 0.38%. However, according to some embodiments including the color filter openings COP, the external light reflectance measured under the same conditions as the comparative example is reduced to about 0.29%, and it can be confirmed that the external light reflectance is reduced by about 20% or more.

[0189] Reference will be made Figure 6 and Figure 7 to describe the display device according to some embodiments in more detail together with the previously described drawings.

[0190] Figure 6 is a cross-sectional view of a display area of a display device according to some embodiments, and Figure 7 is Figure 6 an enlarged view of a part of the cross-sectional view of the display device shown in

[0191] Reference Figure 6 and Figure 7 , the display device 1000a according to some embodiments is mostly the same as the display device 1000 according to the previously described embodiments, but the bank layer BNK is removed from the non-light-emitting region NLA to form a bank opening BOP.

[0192] The bank layer BNK may include a first bank portion BNK a that overlaps with an overlapping portion CFL of the color filter layer and a second bank portion BNKb that does not overlap with the overlapping portion CFL.

[0193] The second bank portion BNKb may be removed from at least a part of the non-light-emitting region NLA to form a bank opening BOP.

[0194] When the overlapping portion CFL is omitted, the first bank portion BNK a may be omitted.

[0195] To form the opening OPA, at least one of the first bank portion BNK a and the second bank portion BNKb may be retained without being omitted.

[0196] In most regions of the non-light-emitting region NLA, the filling layer FLL is connected to the surface of the second substrate SUB2 (e.g., the bottom surface of the second substrate SUB2) through the bank opening BOP of the bank layer BNK.

[0197] The filling layer FLL may be located between the second substrate SUB2 and the display portion DC.

[0198] Reference Figure 6 and Figure 7 The filling layer FLL includes a first filling portion FLLa that overlaps with the light-emitting regions LEA1, LEA2, LEA3, the bank layer BNK, the transmissive layer TL, the first color conversion layer CCL1, and the second color conversion layer CCL2, and a second filling portion FLLb that overlaps with the non-light-emitting region NLA and contacts the surface (e.g., the bottom) of the second substrate SUB2.

[0199] The first filling portion FLLa and the second filling portion FLLb may be integrally formed.

[0200] The second filling portion FLLb may contact the lower surface of the second substrate SUB2.

[0201] According to some embodiments, the bank layer BNK is also removed from the region where the color filter layer is removed from the non-light-emitting region NLA, so that the filling layer FLL contacts the second substrate SUB2, thereby forming the lower surface of the second substrate SUB2, and thus the display quality can be improved by reducing the external light reflectance at the boundary.

[0202] According to the comparative example, when the first color filter CF1, the second color filter CF2, and the third color filter CF3 do not include the color filter opening COP, and the lower surface of the second substrate SUB2 contacts the color filter layer even in the non-light-emitting region NLA, the reflectance between the lower surface of the second substrate SUB2 and the color filter layer is high, so that the external light reflectance from the second substrate SUB2 side is about 0.38%. However, according to some embodiments including the color filter opening COP and the bank opening BOP, the external light reflectance measured under the same conditions is about 0.26%, confirming that the external light reflectance is reduced by more than about 20%.

[0203] Reference will be made Figure 8 to describe the display device according to some embodiments in more detail together with the previously described drawings.

[0204] Figure 8 is a cross-sectional view of the display area of the display device according to some embodiments.

[0205] Reference Figure 8, the display device 1000b according to some embodiments is mostly the same as the display device 1000 according to the previously described embodiments, but it has a structure in which the bank layer BNK, the transmissive layer TL, the first color conversion layer CCL1, and the second color conversion layer CCL2 can be formed on the encapsulation part ENC of the display part DC.

[0206] The filling layer FLL can be located between the bank layer BNK, the transmissive layer TL, the first color conversion layer CCL1, the second color conversion layer CCL2, the color filter layer, and the second substrate SUB2.

[0207] Although not separately pointed out, the bank layer BNK can include a part overlapping with the non-emitting area NLA on a plane and a part overlapping with the overlapping part CFL of the color filter layer.

[0208] The spacer CS can be located between the overlapping part CFL of the bank layer BNK and the color filter layer, but is not limited thereto.

[0209] According to some embodiments, the part of the bank layer BNK overlapping with the overlapping part CFL of the color filter layer can be omitted.

[0210] The filling layer FLL can contact the second substrate SUB2 (e.g., the bottom surface) through the color filter opening COP of the color filter layer in most areas of the non-emitting area NLA.

[0211] According to some embodiments, by contacting the second substrate SUB2 in the area where the color filter layer has been removed in the non-emitting area NLA via the filling layer FLL to reduce the external light reflectance at the lower boundary of the second substrate SUB2, the display quality can be improved.

[0212] According to the comparative example, the first color filter CF1, the second color filter CF2, and the third color filter CF3 do not include the color filter opening COP, so that even in the non-emitting area NLA, the color filter layer is formed. When the lower surface of the second substrate SUB2 contacts the color filter layer, the reflectance between the lower surface of the second substrate SUB2 and the color filter layer is high, so that the external light reflectance on the second substrate SUB2 is about 0.38%. However, according to some embodiments including the color filter opening COP, the measured external light reflectance under the same conditions is reduced to about 0.26%, confirming that the external light reflectance is reduced by about 20% or more.

[0213] Reference will be made to Figure 9 The display device according to some embodiments will be described in more detail together with the previously described drawings.

[0214] Figure 9 is a cross-sectional view of the display area of the display device according to some embodiments.

[0215] ReferenceFigure 9 , a display device according to some embodiments is mostly the same as the display devices 1000, 1000a, and 1000b according to the previously described embodiments, but it may further include a light-blocking layer BM located between the overlapping portion CFL of the second substrate SUB2 and the color filter layer.

[0216] The light-blocking layer BM may be located at a position overlapping with the overlapping portion CFL and may be located in the non-emitting area NLA.

[0217] Similar to the color filter layer, the light-blocking layer BM may be removed in most areas of the non-emitting area NLA (more specifically, in the area where the color filter layer is removed).

[0218] The light-blocking layer BM may include an organic material and may include a pigment such as black carbon.

[0219] Although the embodiments of the present utility model have been described in detail above, the scope of the embodiments according to the present utility model is not limited thereto, and those skilled in the art can make various modifications and improvements using the basic concept of the present utility model defined in the appended claims.

[0220] Description of some of the reference numerals

[0221] 110: Display panel

[0222] 1000, 1000a, 1000b: Display device

[0223] ACT: Semiconductor layer

[0224] BF: Buffer layer

[0225] BM: Light-blocking layer

[0226] BNK: Bank layer

[0227] BOP: Bank opening

[0228] CC, CC1, CC2: Color conversion part

[0229] CC3: Transmission part

[0230] CCL1, CCL2: Color conversion layer

[0231] CF1, CF2, CF3: Color filter

[0232] CFL: Overlapping portion

[0233] COP: Color filter opening

[0234] CS: Spacer

[0235] DA: Display area

[0236] DC: Display section

[0237] ENC: Encapsulation section

[0238] FLL: Filling layer

[0239] GI: Gate insulating layer

[0240] LEA1, LEA2, LEA3: Light-emitting area

[0241] OP: Pixel opening

[0242] OPA: Opening

[0243] PA1, PA2, PA3, PX: Pixel

[0244] PDL: Pixel insulating layer

[0245] SUB, SUB1, SUB2: Substrate

[0246] TL: Transmission layer.

Claims

1. A display device, characterized in that, Comprising: A display portion having a plurality of light-emitting regions and non-light-emitting regions between adjacent light-emitting regions among the plurality of light-emitting regions; And A color conversion portion overlapping the display portion, wherein the color conversion portion includes: A first substrate including a first surface facing the display portion; and A color filter layer on the first surface of the first substrate and including a plurality of color filters, and wherein the color filter layer has color filter openings where at least a portion of the color filter layer is removed in the non-light-emitting regions.

2. The display device according to claim 1, characterized in that: The color conversion portion further includes a bank layer between the first substrate and the display portion, and The bank layer has an opening corresponding to one of the plurality of light-emitting regions.

3. The display device according to claim 2, characterized in that: The bank layer contacts the first surface of the first substrate through the color filter openings.

4. The display device according to claim 3, characterized in that: At least two of the plurality of color filters overlap in the non-light-emitting region to form an overlapping portion.

5. The display device according to claim 4, characterized in that: The color filter openings are defined by the edges of the overlapping portion.

6. The display device according to claim 4, characterized in that: The bank layer includes a first bank portion overlapping the overlapping portion and a second bank portion not overlapping the overlapping portion, and The second bank portion contacts the first surface of the first substrate in the non-light-emitting region.

7. The display device according to claim 3, characterized in that Further comprising: A filling layer between the bank layer and the display portion.

8. The display device according to claim 2, characterized in that: The bank layer is removed from the non-light-emitting region to form bank openings.

9. The display device according to claim 8, characterized in that, Further comprising: A filling layer between the first substrate and the display portion, and The filling layer contacts the first surface of the first substrate through the bank openings.

10. The display device according to claim 9, characterized in that: At least two of the plurality of color filters overlap in the non-light-emitting region to form an overlapping portion.

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