Display device

Abstract

A display device includes: a pixel electrode disposed on a substrate; a light emitting layer disposed on the pixel electrode; a common electrode disposed on the light emitting layer; and a color filter portion disposed on the common electrode, the color filter portion of the first unit pixel including a first color filter, a second color filter, and a third color filter having a substantially fan-shaped shape, the first unit pixel including a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region, the center of the arc of the first color filter, the center of the arc of the second color filter, and the center of the arc of the third color filter are disposed in different pixel regions.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2024 - 0006427, filed with the Korean Intellectual Property Office on January 16, 2024, the entire contents of which are incorporated herein by reference. Technical field

[0003] The present disclosure relates to a display device, and to a display device that can improve image quality by minimizing a color fringing phenomenon. Background art

[0004] With the development of multimedia, display devices are becoming increasingly important. Accordingly, various display devices such as liquid crystal display devices (LCDs) and organic light - emitting diode display devices (OLEDs) are being developed.

[0005] In a display device, a self - emissive display device may include a self - emissive element such as an organic light - emitting diode. The self - emissive element may include two electrodes facing each other and a light - emitting layer between the two electrodes. In the case where the self - emissive element is an organic light - emitting diode, electrons and holes respectively provided from the two electrodes may recombine in the light - emitting layer to generate excitons. When the generated excitons transition from an excited state to a ground state, light may be emitted.

[0006] The display device may include a color conversion element for realizing colors by receiving light from the organic light - emitting diode. For example, the color conversion element may receive blue light from the organic light - emitting diode and may emit blue, green, and red light so that an image with various colors can be viewed. The color conversion element may be provided in the form of an independent substrate in the display device, or may be directly integrally formed with an element in the display device.

[0007] It will be understood that this background art section is intended in part to provide a useful background for understanding the technology. However, this background art section may also include concepts, ideas, or recognitions that were not known or understood by a person skilled in the relevant art before the effective filing date of the corresponding subject matter disclosed herein. Summary of the invention

[0008] Aspects of the present disclosure provide a display device that can improve image quality by minimizing a color fringing phenomenon.

[0009] According to an embodiment, a display device may include: a pixel electrode disposed on a substrate; a light-emitting layer disposed on the pixel electrode; a common electrode disposed on the light-emitting layer; and a color filter portion disposed on the common electrode, wherein the color filter portion of a first unit pixel includes a first color filter, a second color filter, and a third color filter having a substantially fan shape, the first unit pixel includes a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region, and the centers of the arcs of the first color filter, the centers of the arcs of the second color filter, and the centers of the arcs of the third color filter are disposed in different pixel regions.

[0010] In an embodiment, the centers of the arcs of the first color filter, the centers of the arcs of the second color filter, and the centers of the arcs of the third color filter may be respectively disposed in any three of the first pixel region, the second pixel region, the third pixel region, and the fourth pixel region.

[0011] In an embodiment, the centers of the arcs of the first color filter, the centers of the arcs of the second color filter, and the centers of the arcs of the third color filter may not be disposed in any one of the first pixel region, the second pixel region, the third pixel region, and the fourth pixel region.

[0012] In an embodiment, a second unit pixel adjacent to the first unit pixel in one direction may include a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region, the color filter portion disposed in the second unit pixel may include a first color filter, a second color filter, and a third color filter having a substantially fan shape, and in a plan view, the color filter portion of the second unit pixel may have a shape different from that of the color filter portion of the first unit pixel.

[0013] In an embodiment, the color filter portion of the second unit pixel may have a shape rotated at a selectable angle with respect to the color filter portion of the first unit pixel.

[0014] In an embodiment, the color filter portion of the second unit pixel may have a shape rotated approximately 90 degrees or approximately 180 degrees clockwise or counterclockwise with respect to the color filter portion of the first unit pixel.

[0015] In an embodiment, the positions of the first color filter, the second color filter, and the third color filter included in the color filter portion of the second unit pixel may be different from the positions of the first color filter, the second color filter, and the third color filter included in the color filter portion of the first unit pixel.

[0016] In an embodiment, the first color filter of the second unit pixel may have a shape rotated at a selectable angle with respect to the first color filter of the first unit pixel.

[0017] In an embodiment, the first color filter of the second unit pixel may have a shape that is rotated clockwise or counterclockwise by about 90 degrees or about 180 degrees with respect to the first color filter of the first unit pixel.

[0018] In an embodiment, the center of the arc of the first color filter disposed in the first unit pixel and the center of the arc of the first color filter disposed in the second unit pixel may be disposed in different pixel regions.

[0019] In an embodiment, in a case where an imaginary line connecting the center of the arc of the first color filter disposed in the first unit pixel and the center of the first color filter disposed in the first unit pixel is defined as a first center line and an imaginary line connecting the center of the arc of the first color filter disposed in the second unit pixel and the center of the first color filter disposed in the second unit pixel is defined as a second center line, the angle between the imaginary line extending along the first center line and the imaginary line extending along the second center line may be about 90 degrees or about 180 degrees.

[0020] In an embodiment, a third unit pixel adjacent to the first unit pixel in another direction intersecting the above one direction may include a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region. The color filter portion disposed in the third unit pixel may include a first color filter, a second color filter, and a third color filter having a substantially fan shape, and in a plan view, the color filter portion of the third unit pixel may have a shape substantially the same as the shape of the color filter portion of the first unit pixel.

[0021] In an embodiment, the display device may further include a pixel defining layer disposed on the pixel electrode and defining a drilling region and a light emitting region overlapping the pixel electrode.

[0022] In an embodiment, the display device may further include: a common voltage line disposed on the substrate; and a common connection electrode disposed on the common voltage line and electrically connected to the common voltage line through a contact hole of the insulating layer in the drilling region.

[0023] In an embodiment, the light emitting layer may have a drilling passing through the light emitting layer in the drilling region.

[0024] In an embodiment, the common electrode may be electrically connected to the common connection electrode through the drilling of the light emitting layer.

[0025] In an embodiment, the drilling may be disposed in an intersecting region of the common voltage line and the common connection electrode.

[0026] In an embodiment, the common connection electrode may extend in one direction, and the common voltage line may extend in another direction intersecting the one direction.

[0027] In an embodiment, the first unit pixel may be disposed in any one of unit regions surrounded and defined by a plurality of common voltage lines and a plurality of common connection electrodes.

[0028] In an embodiment, each of the first pixel region, the second pixel region, the third pixel region, and the fourth pixel region may have a substantially triangular shape.

[0029] In an embodiment, at least one of the first color filter, the second color filter, and the third color filter may have a central angle of approximately 120 degrees.

[0030] In an embodiment, the pixel electrode of the first unit pixel may include: a first pixel electrode corresponding to the first color filter and having a substantially fan shape; a second pixel electrode corresponding to the second color filter and having a substantially fan shape; and a third pixel electrode corresponding to the third color filter and having a substantially fan shape.

[0031] In an embodiment, a light-transmitting portion may be disposed between the common electrode and the color filter portion.

[0032] In an embodiment, the light-transmitting portion may include a first light-transmitting portion corresponding to the first color filter and having a substantially fan shape.

[0033] In an embodiment, the light-transmitting portion may further include: a second light-transmitting portion corresponding to the second color filter and having a substantially fan shape; and a third light-transmitting portion corresponding to the third color filter and having a substantially fan shape.

[0034] In an embodiment, the first color filter may be a color filter that transmits blue light, the second color filter may be a color filter that transmits green light, and the third color filter may be a color filter that transmits red light.

[0035] However, aspects of the present disclosure are not limited to the aspects set forth herein. The above and other aspects of the present disclosure will become more apparent and understandable to those of ordinary skill in the art to which the present disclosure pertains by referring to the following detailed description of the present disclosure.

[0036] According to an aspect of the present disclosure, there is provided a display device that can improve image quality by minimizing a color moire phenomenon.

[0037] According to another aspect of the present disclosure, there is provided a display device including a color filter having upper edges facing unit pixel groups of various colors so as to minimize a color moire phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] These and / or other aspects will become apparent and more readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0039] Figure 1 is a schematic perspective view of a display device according to an embodiment;

[0040] Figure 2 is along Figure 1 a schematic cross-sectional view taken along line X1-X1';

[0041] Figure 3 is a schematic plan view of a display device according to an embodiment;

[0042] Figure 4 is a schematic cross-sectional view of a display device according to an embodiment;

[0043] Figure 5 is Figure 4 an enlarged view of region B1 of

[0044] Figure 6 is a schematic diagram of an equivalent circuit of a first pixel of a display device according to an embodiment;

[0045] Figure 7 is a schematic plan view of a display device according to an embodiment;

[0046] Figure 8 is provided to correspond to Figure 7 each unit pixel of

[0047] Figure 9 is an array view of a display device according to an embodiment; and

[0048] Figure 10 is along Figure 9 a schematic cross-sectional view taken along line X2-X2'. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] Advantages and features of the present disclosure and methods for achieving them can be more easily understood by referring to the following detailed description of the embodiments and the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete and will fully convey the concept of the present disclosure to those skilled in the art, and the present disclosure will also be defined by the claims.

[0050] It will be understood that when an element or layer is referred to as being "on" another element or layer, the element or layer can be directly on the other element or layer or on an intervening element or layer. Throughout the specification, like reference numerals refer to like elements. The shapes, dimensions, ratios, angles, quantities, etc. disclosed in the drawings for describing the embodiments are examples, and the present disclosure is not limited to the details illustrated.

[0051] In the drawings, for ease of description and for clarity, the dimensions, thicknesses, ratios, and sizes of the elements may be exaggerated. The same reference numerals always refer to the same elements.

[0052] As used herein, the singular forms "a" and "the" are intended to also include the plural forms, unless the context clearly indicates otherwise.

[0053] In the specification, for purposes of its meaning and interpretation, the term "and / or" is intended to include any combination of the terms "and" and "or". For example, "A and / or B" can be understood to mean "A, B, or A and B". The terms "and" and "or" can be used in a conjunctive or disjunctive sense and can be understood as equivalent to "and / or".

[0054] In the specification, for purposes of its meaning and interpretation, the phrase "at least one of" is intended to include the meaning of "at least one selected from the group consisting of". For example, "at least one of A and B" can be understood to mean "A, B, or A and B".

[0055] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, the first element discussed below may be referred to as the second element without departing from the teachings of the present disclosure.

[0056] The features of the various embodiments of the present disclosure may be partially or wholly coupled or combined with each other and may interoperate and co - drive in various technical ways. These embodiments may be implemented independently of each other or may be implemented together.

[0057] The term "overlapping with" or "overlaps" means that a first object may be above, below, or beside a second object, and vice versa. Additionally, the term "overlaps" may include laminating, stacking, facing or confronting, extending over, covering or partially covering, or any other suitable term that one of ordinary skill in the art would recognize and understand.

[0058] The terms "facing" and "confronting" mean that a first element may be directly or indirectly opposite a second element. In the case where a third element is between the first element and the second element, the first element and the second element may be understood to be indirectly opposite each other, although the first element and the second element still face each other.

[0059] When an element is described as "not overlapping" with or "in a non - overlapping manner with" another element, this may include the elements being spaced apart from each other, offset from each other, or separated from each other, or any other suitable term that one of ordinary skill in the art would appreciate and understand.

[0060] As used in this specification, the terms "comprising", "including", "containing", and / or "having", and variations thereof, specify the presence of the stated features, integers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0061] Taking into account the measurements discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system), "about" or "approximate" as used herein includes the stated value and means within an acceptable deviation range of that particular value determined by a person of ordinary skill in the art. For example, "about" may mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0062] Unless otherwise defined or implied herein, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0063] It will be understood that when an element (or region, layer, or portion, etc.) is referred to in this specification as being "on", "connected to", or "coupled to" another element, the element may be disposed directly on the other element, directly connected or coupled to the other element, or an intervening element may be disposed between the element and the other element.

[0064] It will be understood that the terms "connected to" or "coupled to" may include physical connection or coupling or electrical connection or coupling.

[0065] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0066] Figure 1 is a schematic perspective view of a display device 1 according to an embodiment. Figure 2 is along Figure 1 a schematic cross-sectional view taken along line X1-X1'. Figure 3 is a schematic plan view of a display device 1 according to an embodiment. Figure 4 is a schematic cross-sectional view of a display device 1 according to an embodiment. Figure 5 is Figure 4 an enlarged view of region B1 of

[0067] Referring to Figure 1 and Figure 2, the display device 1 according to an embodiment can be applied to portable electronic devices such as mobile phones, smart phones, tablet personal computers (PCs), mobile communication terminals, electronic notebooks, e-books, portable multimedia players (PMPs), navigation devices, and ultra-mobile PCs (UMPCs). As an example, the display device 1 according to an embodiment can be applied as a display unit of a television, a laptop computer, a monitor, a billboard, or an Internet of Things (IoT) device. However, these are presented as examples, and within the spirit and scope of the present disclosure, the display device 1 according to an embodiment can also be used in other electronic devices.

[0068] In Figure 1 , a first direction DR1, a second direction DR2, and a third direction DR3 are defined. The first direction DR1 and the second direction DR2 can be perpendicular to each other, the first direction DR1 and the third direction DR3 can be perpendicular to each other, and the second direction DR2 and the third direction DR3 can be perpendicular to each other. It can be understood that the first direction DR1 refers to the vertical direction in the drawing, the second direction DR2 refers to the horizontal direction in the drawing, and the third direction DR3 refers to the up-and-down direction in the drawing (e.g., the thickness direction). In the following description, unless otherwise specified, "direction" can refer to two directions extending on both sides along that direction. In cases where it is necessary to distinguish between the two "directions" extending on both sides, one side or one flank will be referred to as "the first side in that direction", and the other side will be referred to as "the second side in that direction". Based on Figure 1 , the side in the direction pointed by the arrow will be referred to as the first side, and the side in the direction opposite to that direction will be referred to as the second side.

[0069] For ease of description, when referring to the surface of the display device 1 or each component constituting the display device 1, one surface or a surface on the first side in the direction facing the display image (e.g., in the third direction) will be referred to as the upper surface, and the other surface or another surface opposite to that one surface or a surface will be referred to as the lower surface. However, the present disclosure is not limited thereto, and the above one surface and the above other surface or another surface of each component can also be referred to as the front surface and the rear surface or the first surface and the second surface, respectively. When describing the relative positions of the components of the display device 1, the first side in the third direction DR3 can be referred to as the upper side, and the second side in the third direction DR3 can be referred to as the lower side.

[0070] The display device 1 has a three-dimensional (3D) shape. For example, the display device 1 can have a cuboid shape or a 3D shape similar to a cuboid shape. In an embodiment, the display device 1 according to an embodiment can have a planar shape similar to a quadrilateral shape. In other words, as Figure 1As shown, the display device 1 according to an embodiment may have a planar shape similar to a quadrilateral shape having a short side in a first direction DR1 and a long side in a second direction DR2. However, the present disclosure is not limited thereto. For example, in the planar shape of the display device 1 according to an embodiment, each corner where the short side extending in the first direction DR1 intersects the long side extending in the second direction DR2 may be rounded with a selectable curvature or may be a right angle. The planar shape of the display device 1 is not limited to a quadrilateral shape and may also be similar to other polygonal shapes, circular shapes, or elliptical shapes.

[0071] The display device 1 may include a display area DA in which an image is displayed and a non-display area NDA in which no image is displayed. In an embodiment, the non-display area NDA may surround the edge of the display area DA, but the present disclosure is not limited thereto. A user may view an image displayed in the display area DA from a first side in a third direction DR3 based on Figure 1 which.

[0072] As Figure 2 shown, the display device 1 may include a light-emitting unit 100 and a light-transmitting unit 300 facing the light-emitting unit 100, and may further include a sealing member 700 that binds the light-emitting unit 100 and the light-transmitting unit 300 together and a filler 500 that fills the space between the light-emitting unit 100 and the light-transmitting unit 300.

[0073] The light-emitting unit 100 may include elements and circuits for displaying an image (e.g., self-emitting elements, pixel circuits such as switching elements, and a pixel-defining layer PDL that defines a light-emitting area and a non-light-emitting area in the display area DA, which will be described later). In an embodiment, the self-emitting elements may include at least one of an organic light-emitting diode, a quantum dot light-emitting diode, a micro light-emitting diode based on an inorganic material (e.g., a micro LED), and a nano light-emitting diode based on an inorganic material (e.g., a nano LED). For ease of description, the case where the self-emitting element is an organic light-emitting diode will be described as an example below.

[0074] The light-transmitting unit 300 may be located (or disposed) on the light-emitting unit 100 and may face the light-emitting unit 100. In an embodiment, the light-transmitting unit 300 may include a color conversion pattern for converting the color of incident light emitted from the light-emitting unit 100 and irradiated onto the light-transmitting unit 300. In an embodiment, the light-transmitting unit 300 may include at least any one of a color filter member 320 and a light-transmitting member, which will be described later, as the color conversion pattern. In an embodiment, the light-transmitting unit 300 may include both the color filter member 320 and the light-transmitting member. As will be described later, the light-transmitting member may include a wavelength shifter and / or a light scatterer. The light-transmitting unit 300 may be referred to as a color conversion element.

[0075] The sealing member 700 may be located between the light-emitting unit 100 and the light-transmitting unit 300 in the non-display area NDA. The sealing member 700 may be disposed along the edges of the light-emitting unit 100 and the light-transmitting unit 300 in the non-display area NDA to surround the display area DA in a plan view. The light-emitting unit 100 and the light-transmitting unit 300 may be coupled to each other through the sealing member 700.

[0076] In an embodiment, the sealing member 700 may be made of an organic material. For example, the sealing member 700 may be made of, but not limited to, an epoxy resin. In an embodiment, within the spirit and scope of the present disclosure, the sealing member 700 may be applied in the form of a frit including glass and the like.

[0077] The filling member 500 may be located in the space surrounded by the sealing member 700 between the light-emitting unit 100 and the light-transmitting unit 300. The filling member 500 may fill the space between the light-emitting unit 100 and the light-transmitting unit 300.

[0078] In an embodiment, the filling member 500 may be made of a material that can transmit light. In an embodiment, the filling member 500 may be made of an organic material. For example, the filling member 500 may be made of a silicone-based organic material, an epoxy-based organic material, or a mixture of a silicone-based organic material and an epoxy-based organic material.

[0079] Reference Figure 3 , the display device 1 may further include a flexible printed circuit board FPC and a driving chip IC.

[0080] The non-display area NDA of the display device 1 may include a pad area PDA, and the connection pads PD may be located in the pad area PDA. The pad area PDA may be defined on the light-emitting unit 100. Accordingly, the connection pads PD may be disposed on the light-emitting unit 100.

[0081] The flexible printed circuit board FPC may be connected to the connection pads PD. The flexible printed circuit board FPC may electrically connect the light-emitting unit 100 to a circuit board that provides signals and power for driving the display device 1.

[0082] The driving chip IC may be electrically connected to the circuit board to receive data and signals. In an embodiment, the driving chip IC may be a data driving chip IC, and may receive a data control signal and image data from the circuit board and generate and output a data voltage corresponding to the image data.

[0083] In an embodiment, the driving chip IC may be mounted on the flexible printed circuit board FPC. For example, the driving chip IC may be mounted on the flexible printed circuit board FPC in the form of a chip on film (COF).

[0084] As will be described later, the data voltage provided from the driving chip IC, the power supplied from the circuit board, etc. can be transmitted to the pixel circuit of the light-emitting unit 100 via the flexible printed circuit board FPC and the connection pad PD.

[0085] Now, the light-emitting region defined in the light-emitting unit 100 of the display device 1 and the light-transmitting region defined in the light-transmitting unit 300 will be described in more detail.

[0086] The light-emitting region can be defined in the light-emitting unit 100 of the display device 1 according to an embodiment, and the light-transmitting region can be defined in the light-transmitting unit 300.

[0087] The display area DA and the non-display area NDA defined in the display device 1 can be applied to the light-emitting unit 100 and the light-transmitting unit 300.

[0088] The first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 can be defined in the display area DA of the light-emitting unit 100. The first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 can be regions that emit the light generated by the light-emitting elements of the light-emitting unit 100 to the outside of the light-emitting unit 100. The non-light-emitting region NELA can be a region that does not emit light to the outside of the light-emitting unit 100. In an embodiment, the non-light-emitting region NELA can surround the first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 in the display area DA, but the present disclosure is not limited thereto.

[0089] In an embodiment, the light emitted to the outside from the first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 can be light of a first color. In an embodiment, the light of the first color can be blue light and can have a peak wavelength in the range of about 440 nm to about 480 nm. Here, the peak wavelength refers to the wavelength at which the light intensity is the greatest.

[0090] In an embodiment, the area of the first light-emitting region EA1, the area of the second light-emitting region EA2, and the area of the third light-emitting region EA3 can be substantially the same. However, the present disclosure is not limited thereto. For example, the area of the first light-emitting region EA1, the area of the second light-emitting region EA2, and the area of the third light-emitting region EA3 can also be different from each other.

[0091] The first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may be defined in the display region DA of the light-transmitting unit 300. The first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may be regions through which light generated from the first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 of the light-emitting unit 100 is transmitted. The light-blocking region BA may be located around the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 in the display region DA of the light-transmitting unit 300. In an embodiment, the light-blocking region BA may surround the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3. However, the present disclosure is not limited thereto. For example, the light-blocking region BA may be located in the non-display region NDA and the display region DA of the light-transmitting unit 300.

[0092] The first light-transmitting region TA1 may correspond to and overlap with the first light-emitting region EA1, the second light-transmitting region TA2 may correspond to and overlap with the second light-emitting region EA2, and the third light-transmitting region TA3 may correspond to and overlap with the third light-emitting region EA3. In an embodiment, the first light-transmitting region TA1 may have an area substantially the same as the area of the first light-emitting region EA1 to completely overlap with the first light-emitting region EA1, the second light-transmitting region TA2 may have an area substantially the same as the area of the second light-emitting region EA2 to completely overlap with the second light-emitting region EA2, and the third light-transmitting region TA3 may have an area substantially the same as the area of the third light-emitting region EA3 to completely overlap with the third light-emitting region EA3. However, the present disclosure is not limited thereto. For example, the first light-transmitting region TA1 may also have an area different from the area of the first light-emitting region EA1, the second light-transmitting region TA2 may also have an area different from the area of the second light-emitting region EA2, and the third light-transmitting region TA3 may also have an area different from the area of the third light-emitting region EA3.

[0093] The first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may form a group A1. A group A1 formed by the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may be repeatedly provided in the display region DA.

[0094] As described above, the light of the first color emitted from the light-emitting unit 100 can be provided to the outside of the display device 1 through the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3. The light emitted to the outside of the display device 1 from the first light-transmitting region TA1 can be referred to as first output light, the light emitted to the outside of the display device 1 from the second light-transmitting region TA2 can be referred to as second output light, and the light emitted to the outside of the display device 1 from the third light-transmitting region TA3 can be referred to as third output light. In this case, the first output light can be light of the first color, the second output light can be light of the second color, and the third output light can be light of the third color.

[0095] In an embodiment, the light of the first color can be blue light having a peak wavelength in the range of about 440 nm to about 480 nm as described above, and the light of the second color can be green light having a peak wavelength in the range of about 510 nm to about 550 nm. The light of the third color can be red light having a peak wavelength in the range of about 610 nm to about 650 nm.

[0096] Now, the structure of the display device 1 will be described in detail.

[0097] Reference Figure 4 , as described above, the display device 1 can include a light-emitting unit 100, a light-transmitting unit 300 disposed on the light-emitting unit 100 to face the light-emitting unit 100, and a filler 500 between the light-emitting unit 100 and the light-transmitting unit 300. For ease of explanation, the light-emitting unit 100, the light-transmitting unit 300, and the filler 500 will be described in this order below.

[0098] The light-emitting unit 100 can have a structure in which a first substrate 110, a buffer layer 120, a bottom metal layer BML, a first insulating layer 130, an active layer ACT, a gate insulating layer GI, a gate electrode GE, a second insulating layer 150, source / drain electrodes, a third insulating layer 160, a light-emitting element, a pixel defining layer PDL, a first cover layer CPL1, and a thin-film encapsulation layer TFE are sequentially stacked on a first side in a third direction DR3.

[0099] The first substrate 110 of the light-emitting unit 100 can serve as a base of the light-emitting unit 100. The first substrate 110 can be made of a light-transmitting material. The first substrate 110 can be a glass substrate or a plastic substrate. In the case where the first substrate 110 is a plastic substrate, it can be flexible. In an embodiment, in the case where the first substrate 110 is a plastic substrate, it can include, but is not limited to, polyimide.

[0100] The buffer layer 120 of the light-emitting unit 100 may be disposed on the first substrate 110. The buffer layer 120 may block foreign substances or moisture introduced through the first substrate 110 from entering the components disposed on the buffer layer 120.

[0101] In an embodiment, the buffer layer 120 may include inorganic materials such as SiO2, SiN x or SiO x N y and may be formed as a single layer or multiple layers, but the present disclosure is not limited thereto.

[0102] The bottom metal layer BML of the light-emitting unit 100 may be disposed on the buffer layer 120. The bottom metal layer BML may block external light or light emitted from the light-emitting element to be described later from entering the active layer ACT. Accordingly, the bottom metal layer BML may prevent leakage current due to light in the thin-film transistor to be described later, or may reduce the generation of leakage current.

[0103] The bottom metal layer BML may be made of a material that blocks light and has conductivity. In an embodiment, the bottom metal layer BML may include a single material selected from metals such as silver (Ag), nickel (Ni), gold (Au), platinum (Pt), aluminum (Al), copper (Cu), molybdenum (Mo), titanium (Ti), and neodymium (Nd), or may include an alloy of these metals. In an embodiment, the bottom metal layer BML may have a single-layer structure or a multi-layer structure. For example, in the case where the bottom metal layer BML has a multi-layer structure, each of the bottom metal layers BML may have, but is not limited to, a stacked structure of titanium (Ti) / copper (Cu) / indium tin oxide (ITO) or a stacked structure of titanium (Ti) / copper (Cu) / aluminum oxide (Al2O3).

[0104] In an embodiment, the bottom metal layer BML may correspond to and overlap with the active layer ACT respectively. In an embodiment, the bottom metal layer BML may be wider than the active layer ACT.

[0105] In an embodiment, the bottom metal layer BML may be a part of a data line, a power line, and a line that electrically connects a thin-film transistor not shown in the drawing to the thin-film transistors shown in the drawing ( Figure 4 GE, ACT, DE, and SE in the drawing). In an embodiment, the bottom metal layer BML may be made of a material having a lower resistance than the source electrode SE and the drain electrode DE.

[0106] The first insulating layer 130 of the light-emitting unit 100 may be disposed on the bottom metal layer BML. The first insulating layer 130 may electrically insulate the bottom metal layer BML from the active layer ACT. The first insulating layer 130 may cover the bottom metal layer BML.

[0107] In an embodiment, the first insulating layer 130 may include, but is not limited to, inorganic materials such as SiO2, SiN x , SiO x N y , Al2O3, TiO2, Ta2O, HfO2, or ZrO2.

[0108] The active layer ACT of the light-emitting unit 100 may be disposed on the first insulating layer 130. The active layer ACT may correspond to a first light-emitting region EA1, a second light-emitting region EA2, and a third light-emitting region EA3 in the display region DA of the light-emitting unit 100, respectively. The active layer ACT may overlap with the bottom metal layer BML, respectively, thereby suppressing the generation of photocurrent in the active layer ACT.

[0109] The active layer ACT may include an oxide semiconductor. In an embodiment, each of the active layers ACT may be made of a zinc oxide-based material such as zinc oxide, indium zinc oxide, or gallium indium zinc oxide, or may be an In-Ga-Zn-O (IGZO) semiconductor including metals such as indium (In) and gallium (Ga) in ZnO. However, the present disclosure is not limited thereto. For example, the active layer ACT may also include amorphous silicon or polycrystalline silicon.

[0110] The gate electrode GE of the light-emitting unit 100 may be disposed on the active layer ACT. The gate electrode GE may overlap with the active layer ACT in the display region DA. In an embodiment, the gate electrode GE may be narrower than the active layer ACT, but the present disclosure is not limited thereto.

[0111] In an embodiment, each of the gate electrodes GE may include one or more of aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and copper (Cu), and may be formed as a single layer or multiple layers, but the present disclosure is not limited thereto.

[0112] The gate insulating layer GI of the light-emitting unit 100 may be disposed between the active layer ACT and the gate electrode GE. The gate insulating layer GI may insulate the active layer ACT from the gate electrode GE. In an embodiment, the gate insulating layer GI may have a partially patterned shape, rather than being formed as a layer disposed on the surface of the first substrate 110 on the first side in the third direction DR3. The gate insulating layer GI may be narrower than the active layer ACT and may be wider than the gate electrode GE, but the present disclosure is not limited thereto.

[0113] In an embodiment, the gate insulating layer GI may include an inorganic material. For example, the gate insulating layer GI may include one of the inorganic materials included in the description of the first insulating layer 130.

[0114] The second insulating layer 150 of the light emitting unit 100 may be disposed on the gate insulating layer GI to cover the active layer ACT and the gate electrode GE. In an embodiment, the second insulating layer 150 may serve as a planarization layer for providing a flat surface.

[0115] The second insulating layer 150 may include an organic material. In an embodiment, the second insulating layer 150 may include, but is not limited to, at least any one of photosensitive acrylic (PAC), polystyrene, polymethyl methacrylate (PMMA), polyacrylonitrile (PAN), polyamide, polyimide, polyarylether, heterocyclic polymer, parylene, fluoropolymer, epoxy resin, benzocyclobutene series resin, silicone series resin, and silane resin.

[0116] The source electrode SE and the drain electrode DE of the light emitting unit 100 may be spaced apart from each other on the second insulating layer 150. The source electrode SE and the drain electrode DE may be connected to the active layer ACT through contact holes passing through the second insulating layer 150, respectively. In an embodiment, the source electrode SE may pass through the first insulating layer 130 and the second insulating layer 150, and thus may be connected to the bottom metal layer BML. In the case where the bottom metal layer BML is part of a line for transmitting a signal or voltage, the source electrode SE may be electrically coupled or electrically connected to the bottom metal layer BML to receive the voltage provided to the above line. As an example, in the case where the bottom metal layer BML is a floating pattern rather than a line, the voltage applied to the source electrode SE may be transmitted to the bottom metal layer BML.

[0117] Each of the source electrode SE and the drain electrode DE may include aluminum (Al), copper (Cu), titanium (Ti), etc., and may be formed as a multi-layer or a single layer. In an embodiment, the source electrode SE and the drain electrode DE may have a multi-layer structure of, but not limited to, Ti / Al / Ti.

[0118] The above active layer ACT, gate electrode GE, source electrode SE, and drain electrode DE may form a thin film transistor that is a switching element. In an embodiment, the thin film transistors may be located in the first light emitting region EA1, the second light emitting region EA2, and the third light emitting region EA3, respectively. In an embodiment, a part of each of the thin film transistors may be located in the non-light emitting region NELA.

[0119] The third insulating layer 160 of the light emitting unit 100 may be disposed on the second insulating layer 150 to cover the thin film transistor. In an embodiment, the third insulating layer 160 may be a planarization layer.

[0120] The third insulating layer 160 may be made of an organic material. In an embodiment, the third insulating layer 160 may include an acrylic resin, an epoxy resin, an imide resin, or an esterified resin, or may include a photosensitive organic material, but the present disclosure is not limited thereto.

[0121] The pixel electrode PE may be disposed on the third insulating layer 160 in the display area DA of the light emitting unit 100.

[0122] The pixel electrode PE may overlap with the first light emitting area EA1, the second light emitting area EA2, and the third light emitting area EA3, respectively, and at least a part of each of the pixel electrodes PE may extend into the non-light emitting area NELA. The pixel electrode PE may be connected to the drain electrode DE of the thin film transistor.

[0123] In an embodiment, the pixel electrode PE may be a reflective electrode. In this case, each of the pixel electrodes PE may be a metal layer including a metal such as Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, or Cr. In an embodiment, each of the pixel electrodes PE may further include a metal oxide layer stacked on the metal layer. In an embodiment, the pixel electrode PE may have a multi-layer structure (for example, a two-layer structure of ITO / Ag, Ag / ITO, ITO / Mg, or ITO / MgF2 or a three-layer structure of ITO / Ag / ITO).

[0124] The pixel defining layer PDL of the light emitting unit 100 may be disposed on the pixel electrode PE. The pixel defining layer PDL may define the first light emitting area EA1, the second light emitting area EA2, and the third light emitting area EA3 as openings exposing the pixel electrode PE.

[0125] The pixel defining layer PDL may overlap with the light blocking area BA of the light transmissive unit 300, which will be described later, in the third direction DR3. The pixel defining layer PDL may overlap with the bank member BK, which will be described later, in the third direction DR3.

[0126] In an embodiment, the pixel defining layer PDL may include an organic insulating material such as a polyacrylate resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polyphenylene ether resin, a polyphenylene sulfide resin, or benzocyclobutene (BCB). However, the present disclosure is not limited thereto.

[0127] The light-emitting layer OL of the light-emitting unit 100 may be disposed on the pixel electrode PE. In an embodiment, the light-emitting layer OL may be in the form of a continuous layer formed over the light-emitting regions EA1 to EA3 and the non-light-emitting region NELA. In an embodiment, the light-emitting layer OL may be located only in the display region DA. However, the present disclosure is not limited thereto. For example, a part of the light-emitting layer OL may be further disposed in the non-display region NDA. The light-emitting layer OL will be described in more detail later.

[0128] The cathode CE of the light-emitting unit 100 may be disposed on the light-emitting layer OL. In an embodiment, the cathode CE may be disposed on the light-emitting layer OL and may be in the form of a continuous layer formed over the light-emitting regions EA1 to EA3 and the non-light-emitting region NELA. In other words, the cathode CE may completely cover the light-emitting layer OL.

[0129] The cathode CE may have semi-transparency or transparency. When the thickness of the cathode CE is several tens to several hundreds of angstroms, the cathode CE may have semi-transparency. In an embodiment, when the cathode CE has semi-transparency, it may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca,, Mo, Ti or their compounds (e.g., LiF) or mixtures (e.g., a mixture of Ag and Mg) or materials having a multilayer structure such as LiF / Ca or LiF / Al. The cathode CE may also have transparency by including a transparent conductive oxide. In an embodiment, when the cathode CE has transparency, it may include tungsten oxide (W x O y )、titanium oxide (TiO2), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO) or magnesium oxide (MgO).

[0130] The pixel electrode PE, the light-emitting layer OL, and the cathode CE may form a light-emitting element. For example, the pixel electrode PE, the light-emitting layer OL, and the cathode CE overlapping the first light-emitting region EA1 may form a first light-emitting element, the pixel electrode PE, the light-emitting layer OL, and the cathode CE overlapping the second light-emitting region EA2 may form a second light-emitting element, and the pixel electrode PE, the light-emitting layer OL, and the cathode CE overlapping the third light-emitting region EA3 may form a third light-emitting element.

[0131] Each of the first light-emitting element, the second light-emitting element, and the third light-emitting element may emit output light LE.

[0132] The output light LE finally emitted from the light-emitting layer OL can be a mixture of a first component LE1 and a second component LE2. Each of the first component LE1 and the second component LE2 in the output light LE can have a peak wavelength in the range of approximately 440 nm to approximately 480 nm. For example, the output light LE can be blue light.

[0133] In an embodiment, the light-emitting layer OL can have a structure in which light-emitting material layers are stacked on top of each other as shown in Figure 5 For example, it can have a tandem structure. For example, the light-emitting layer OL can include a first stack ST1 including a first light-emitting material layer EML1, a second stack ST2 located on the first stack ST1 and including a second light-emitting material layer EML2, a third stack ST3 located on the second stack ST2 and including a third light-emitting material layer EML3, a first charge generation layer CGL1 located between the first stack ST1 and the second stack ST2, and a second charge generation layer CGL2 located between the second stack ST2 and the third stack ST3. The first stack ST1, the second stack ST2, and the third stack ST3 can overlap each other.

[0134] The first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can overlap each other.

[0135] In an embodiment, the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can all emit light of a first color (e.g., blue light). For example, each of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can be a blue light-emitting layer and can include an organic material.

[0136] In an embodiment, at least any one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can emit a first blue light having a first peak wavelength, and at least another one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can emit a second blue light having a second peak wavelength different from the first peak wavelength. For example, any one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can emit a first blue light having a first peak wavelength, and the other two of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 can emit a second blue light having a second peak wavelength. For example, the output light LE finally emitted from the light-emitting layer OL can be a mixture of a first component LE1 and a second component LE2. Here, the first component LE1 can be a first blue light having a first peak wavelength, and the second component LE2 can be a second blue light having a second peak wavelength.

[0137] In an embodiment, any one of the first peak wavelength and the second peak wavelength may be in the range of about 440 nm to less than about 460 nm. The other of the first peak wavelength and the second peak wavelength may be in the range of about 460 nm to about 480 nm. However, the ranges of the first peak wavelength and the second peak wavelength are not limited to this example. For example, both the range of the first peak wavelength and the range of the second peak wavelength may include about 460 nm. In an embodiment, any one of the first blue light and the second blue light may be dark blue light, and the other of the first blue light and the second blue light may be sky blue light.

[0138] According to an embodiment, the output light LE emitted from the light emitting layer OL may be blue light and may include a long wavelength component and a short wavelength component. Thus, the light emitting layer OL can finally emit blue light having a relatively wide emission peak wavelength as the output light LE, thereby improving the color visibility of the side viewing angle as compared with a conventional light emitting element that emits blue light having a sharp emission peak wavelength.

[0139] In an embodiment, each of the first light emitting material layer EML1, the second light emitting material layer EML2, and the third light emitting material layer EML3 may include a host and a dopant. The host is not particularly limited as long as it is a commonly used material. For example, tris(8-hydroxyquinolinato)aluminum (Alq3), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly(n-vinylcarbazole) (PVK), 9,10-di(naphthalen-2-yl)anthracene (ADN), 4,4',4''-tris(carbazol-9-yl)-triphenylamine (TCTA), 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi), 3-tert-butyl-9,10-di(naphthalen-2-yl)anthracene (TBADN), distyrylarylene (DSA), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP), or 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN) may be used.

[0140] Each of the first light emitting material layer EML1, the second light emitting material layer EML2, and the third light emitting material layer EML3 that emit blue light may include, for example, a fluorescent material including any one of spiro-DPVBi, spiro-6P, distyrylbenzene (DSB), distyrylarylene (DSA), polyfluorene (PFO)-based polymers, and poly(phenylene vinylene) (PPV)-based polymers. As an example, a phosphorescent material including an organometallic complex such as (4,6-F2ppy)2Irpic may be included.

[0141] As described above, at least one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 and at least another one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 emit blue light in different wavelength ranges. To emit blue light in different wavelength ranges, the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may include the same material, and the resonance distance may be adjusted. As an example, to emit blue light in different wavelength ranges, at least one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 and at least another one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may include different materials.

[0142] However, the present disclosure is not limited thereto. The first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may all emit blue light having a peak wavelength in the range of about 440 nm to about 480 nm and may be made of the same material.

[0143] As an example, in an embodiment, at least any one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may emit first blue light having a first peak wavelength, another one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may emit second blue light having a second peak wavelength different from the first peak wavelength, and the remaining one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may emit third blue light having a third peak wavelength different from the first peak wavelength and the second peak wavelength. In an embodiment, any one of the first peak wavelength, the second peak wavelength, and the third peak wavelength may be in the range of about 440 nm to less than about 460 nm. Another one of the first peak wavelength, the second peak wavelength, and the third peak wavelength may be in the range of about 460 nm to less than about 470 nm, and the remaining one of the first peak wavelength, the second peak wavelength, and the third peak wavelength may be in the range of about 470 nm to about 480 nm.

[0144] According to an embodiment, the output light LE emitted from the light-emitting layer OL is blue light and may include a long-wavelength component, a medium-wavelength component, and a short-wavelength component. Therefore, the light-emitting layer OL may finally emit blue light having a wide emission peak wavelength as the output light LE, and the color visibility of the side viewing angle may be improved.

[0145] According to the above embodiments, it is possible to improve the luminous efficiency and extend the lifespan of the display device 1 as compared to a conventional light-emitting element that does not employ a tandem structure (e.g., a structure in which light-emitting material layers are stacked on top of each other).

[0146] As an example, in an embodiment, at least any one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may emit light of a first color (e.g., blue light), and at least another one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may emit light of a second color (e.g., green light). In an embodiment, the blue light emitted from at least any one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may have a peak wavelength in the range of about 440 nm to about 480 nm or about 460 nm to about 480 nm. The green light emitted from at least another one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may have a peak wavelength in the range of about 510 nm to about 550 nm.

[0147] For example, any one of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may be a green light-emitting material layer that emits green light, and the remaining two of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may be blue light-emitting material layers that emit blue light. In the case where the remaining two of the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 are blue light-emitting material layers, the peak wavelengths of the blue light emitted from the two blue light-emitting material layers may be in the same range or in different ranges.

[0148] According to an embodiment, the output light LE emitted from the light-emitting layer OL may be a mixture of a first component LE1 that is blue light and a second component LE2 that is green light. For example, in the case where the first component LE1 is dark blue light and the second component LE2 is green light, the output light LE may be sky blue light. As in the above embodiments, the output light LE that is a mixture of blue light and green light emitted from the light-emitting layer OL may include a long-wavelength component and a short-wavelength component. Therefore, the light-emitting layer OL can finally emit blue light with a relatively wide emission peak wavelength as the output light LE, and the color visibility of the side viewing angle can be improved. Since the second component LE2 of the output light LE is green light, the green light component can be supplemented in the light provided from the display device 1 to the outside. Accordingly, the color reproducibility of the display device 1 can be improved.

[0149] In an embodiment, the green light-emitting material layer among the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3 may include a host and a dopant. The host included in the green light-emitting material layer is not particularly limited as long as it is a commonly used material. For example, tris(8-hydroxyquinolinato)aluminum (Alq3), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly(n-vinylcarbazole) (PVK), 9,10-bis(naphthalen-2-yl)anthracene (ADN), 4,4',4''-tris(carbazol-9-yl)-triphenylamine (TCTA), 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi), 3-tert-butyl-9,10-bis(naphthalen-2-yl)anthracene (TBADN), distyrylarylene (DSA), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP), or 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN) may be used.

[0150] The dopant included in the green light-emitting material layer may be, for example, a fluorescent material containing tris(8-hydroxyquinolinato)aluminum (Alq3), or may be a phosphorescent material such as Ir(ppy)3 (tris(2-phenylpyridine)iridium), Ir(ppy)2(acac) (bis(2-phenylpyridine)(acetylacetonate)iridium(III)), or Ir(mppy)3 (tris(2-phenyl-4-methyl-pyridine)iridium).

[0151] The first charge generation layer CGL1 may be located between the first stack ST1 and the second stack ST2. The first charge generation layer CGL1 may inject charges into each light-emitting material layer. The first charge generation layer CGL1 may control the charge balance between the first stack ST1 and the second stack ST2. The first charge generation layer CGL1 may include an n-type charge generation layer CGL11 and a p-type charge generation layer CGL12. The p-type charge generation layer CGL12 may be disposed on the n-type charge generation layer CGL11 and may be located between the n-type charge generation layer CGL11 and the second stack ST2.

[0152] The first charge generation layer CGL1 may have a structure in which an n-type charge generation layer CGL11 and a p-type charge generation layer CGL12 are in contact with each other. The n-type charge generation layer CGL11 is disposed closer to the pixel electrode PE1 among the pixel electrode PE1 and the cathode CE. The p-type charge generation layer CGL12 is disposed closer to the cathode CE among the pixel electrode PE1 and the cathode CE. The n-type charge generation layer CGL11 supplies electrons to the first light-emitting material layer EML1 adjacent to the pixel electrode PE1, and the p-type charge generation layer CGL12 supplies holes to the second light-emitting material layer EML2 included in the second stack ST2. Since the first charge generation layer CGL1 is disposed between the first stack ST1 and the second stack ST2 to supply charges to each light-emitting material layer, the light-emitting efficiency can be improved and the driving voltage can be reduced.

[0153] In Figure 4 it, the pixel electrode PE corresponding to the first light-emitting region EA1 may be defined as the first pixel electrode PE1 (e.g., the first pixel electrode PE1 of the first pixel PX1), the pixel electrode PE corresponding to the second light-emitting region EA2 may be defined as the second pixel electrode PE2 (e.g., the second pixel electrode PE2 of the second pixel PX2), and the pixel electrode PE corresponding to the third light-emitting region EA3 may be defined as the third pixel electrode PE3 (e.g., the third pixel electrode PE3 of the third pixel PX3). In this case, the first stack ST1 may be located on the first pixel electrode PE1, the second pixel electrode PE2, and the third pixel electrode PE3, and may further include a first hole transport layer HTL1, a first hole blocking layer BIL1, and a first electron transport layer ETL1.

[0154] The first hole transport layer HTL1 may be located on the first pixel electrode PE1, the second pixel electrode PE2, and the third pixel electrode PE3. The first hole transport layer HTL1 may facilitate the transport of holes and may include a hole transport material. The hole transport material may include, but is not limited to, carbazole derivatives such as N-phenylcarbazole or polyvinylcarbazole, fluorene derivatives, triphenylamine derivatives such as N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (TPD) or 4,4',4''-tris(N-carbazolyl)triphenylamine (TCTA), N,N'-di(1-naphthyl)-N,N'-diphenylbenzidine (NPB), or 4,4'-cyclohexylidenebis[N,N-bis(4-methylphenyl)aniline] (TAPC).

[0155] The first electron blocking layer BIL1 may be located on the first hole transport layer HTL1 and may be located between the first hole transport layer HTL1 and the first light-emitting material layer EML1. The first electron blocking layer BIL1 may include a hole transport material and a metal or metal compound to prevent electrons generated by the first light-emitting material layer EML1 from entering the first hole transport layer HTL1. In an embodiment, the first hole transport layer HTL1 and the first electron blocking layer BIL1 may each be formed as a single layer in which their respective materials are mixed.

[0156] The first electron transport layer ETL1 may be located on the first light-emitting material layer EML1 and may be located between the first charge generation layer CGL1 and the first light-emitting material layer EML1. In an embodiment, the first electron transport layer ETL1 may include an electron transport material such as tris(8-hydroxyquinoline)aluminum (Alq3), 1,3,5-tris(1-phenyl-1H-benzo[d]imidazol-2-yl)benzene (TPBi), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), 3-(4-biphenylyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), 4-(naphthalen-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (tBu-PBD), bis(2-methyl-8-quinolinato-N1,O8)-(1,1'-biphenyl-4-olato)aluminum (BAlq), bis(benzoquinolinato-10-hydroxy)beryllium (Bebq2), 9,10-bis(naphthalen-2-yl)anthracene (ADN), or a mixture thereof. However, the present disclosure is not limited to such electron transport materials. The second stack ST2 may be located on the first charge generation layer CGL1 and may further include a second hole transport layer HTL2, a second electron blocking layer BIL2, and a second electron transport layer ETL2.

[0157] The second hole transport layer HTL2 may be located on the first charge generation layer CGL1. The second hole transport layer HTL2 may be made of the same material as the material of the first hole transport layer HTL1 or may include one or more materials selected from the materials described as being included in the first hole transport layer HTL1. The second hole transport layer HTL2 may be composed of a single layer or multiple layers.

[0158] The second electron blocking layer BIL2 may be located on the second hole transport layer HTL2 and may be located between the second hole transport layer HTL2 and the second light-emitting material layer EML2. The second electron blocking layer BIL2 may have the same material and structure as the material and structure of the first electron blocking layer BIL1, or may include one or more materials selected from the materials described as included in the material of the first electron blocking layer BIL1.

[0159] The second electron transport layer ETL2 may be located on the second light-emitting material layer EML2 and may be located between the second charge generation layer CGL2 and the second light-emitting material layer EML2. The second electron transport layer ETL2 may have the same material and structure as the material and structure of the first electron transport layer ETL1, or may include one or more materials selected from the materials described as included in the material of the first electron transport layer ETL1. The second electron transport layer ETL2 may be composed of a single layer or multiple layers.

[0160] The second charge generation layer CGL2 may be located on the second stack ST2 and may be located between the second stack ST2 and the third stack ST3.

[0161] The second charge generation layer CGL2 may have the same structure as the above-described first charge generation layer CGL1. For example, the second charge generation layer CGL2 may include an n-type charge generation layer CGL21 disposed close to the second stack ST2 and a p-type charge generation layer CGL22 disposed close to the cathode CE. The p-type charge generation layer CGL22 may be disposed on the n-type charge generation layer CGL21.

[0162] The second charge generation layer CGL2 may have a structure in which the n-type charge generation layer CGL21 and the p-type charge generation layer CGL22 are in contact with each other. The first charge generation layer CGL1 and the second charge generation layer CGL2 may be made of different materials or the same material.

[0163] The third stack ST3 may be located on the second charge generation layer CGL2 and may further include a third hole transport layer HTL3 and a third electron transport layer ETL3.

[0164] The third hole transport layer HTL3 may be located on the second charge generation layer CGL2. The third hole transport layer HTL3 may be made of the same material as the material of the first hole transport layer HTL1, or may include one or more materials selected from the materials described as included in the material of the first hole transport layer HTL1. The third hole transport layer HTL3 may be composed of a single layer or multiple layers. In the case where the third hole transport layer HTL3 is composed of multiple layers, these layers may include different materials.

[0165] The third electron transport layer ETL3 may be located on the third light-emitting material layer EML3 and may be located between the cathode CE and the third light-emitting material layer EML3. The third electron transport layer ETL3 may have the same material and structure as the material and structure of the first electron transport layer ETL1, or may include one or more materials selected from the materials described as being included in the first electron transport layer ETL1. The third electron transport layer ETL3 may be composed of a single layer or multiple layers. In the case where the third electron transport layer ETL3 is composed of multiple layers, these layers may include different materials.

[0166] Although not shown in the drawings, a hole injection layer may be further located in at least any one of the spaces between the first stack ST1 and the first pixel electrode PE1, the second pixel electrode PE2, and the third pixel electrode PE3, between the second stack ST2 and the first charge generation layer CGL1, and between the third stack ST3 and the second charge generation layer CGL2. The hole injection layer may facilitate the injection of holes into the first light-emitting material layer EML1, the second light-emitting material layer EML2, and the third light-emitting material layer EML3. In an embodiment, the hole injection layer may be made of, but not limited to, any one or more of copper phthalocyanine (CuPc), poly(3,4)-ethylenedioxythiophene (PEDOT), polyaniline (PANI), and N,N'-dinaphthyl-N,N'-diphenylbenzidine (NPD). In an embodiment, the hole injection layer may be located between the first stack ST1 and the first pixel electrode PE1, the second pixel electrode PE2, and the third pixel electrode PE3, between the second stack ST2 and the first charge generation layer CGL1, and between the third stack ST3 and the second charge generation layer CGL2.

[0167] Although not shown in the drawings, the electron injection layer may further be located in at least any one of the spaces between the third electron transport layer ETL3 and the cathode CE, between the second charge generation layer CGL2 and the second stack ST2, and between the first charge generation layer CGL1 and the first stack ST1. The electron injection layer may facilitate the injection of electrons and may use tris(8-hydroxyquinoline)aluminum (Alq3), PBD, TAZ, spiro-PBD, BAlq, or SAlq, but the present disclosure is not limited thereto. The electron injection layer may include a metal halide material (e.g., any one or more of MgF2, LiF, NaF, KF, RbF, CsF, FrF, LiI, NaI, KI, RbI, CsI, FrI, and CaF2), but the present disclosure is not limited thereto. As an example, the electron injection layer may include a lanthanum material such as Yb, Sm, or Eu. As an example, the electron injection layer may include both a metal halide material and a lanthanum material such as RbI:Yb or KI:Yb. In the case where the electron injection layer may include both a metal halide material and a lanthanum material, the electron injection layer may be formed by co-deposition of the metal halide material and the lanthanum material. In an embodiment, the electron injection layer may be located between the third electron transport layer ETL3 and the cathode CE, between the second charge generation layer CGL2 and the second stack ST2, and between the first charge generation layer CGL1 and the first stack ST1.

[0168] In an embodiment, the light-emitting layer OL may not include a red light-emitting material layer and thus may not emit light of a third color (e.g., red light). In other words, the output light LE may not include a light component having a peak wavelength in the range of about 610 nm to about 650 nm and may only include a light component having a peak wavelength in the range of about 440 nm to about 550 nm.

[0169] Return reference Figure 4 , the first cover layer CPL1 of the light-emitting unit 100 may be disposed on the cathode CE. The first cover layer CPL1 may improve the viewing angle characteristics and may increase the light-emitting efficiency. The first cover layer CPL1 may be commonly disposed in the first light-emitting region EA1, the second light-emitting region EA2, the third light-emitting region EA3, and the non-light-emitting region NELA.

[0170] The first cover layer CPL1 may completely cover the cathode CE.

[0171] The first capping layer CPL1 may include at least any one of an inorganic material and an organic material having a light-transmitting property. In other words, the first capping layer CPL1 may be formed of an inorganic layer or an organic layer, or may be formed of an organic layer including inorganic particles. In an embodiment, the first capping layer CPL1 may include, but is not limited to, a triamine derivative, a carbazole biphenyl derivative, an aromatic diamine derivative, or an aluminum quinoline complex (e.g., Alq3).

[0172] The thin film encapsulation layer TFE of the light emitting unit 100 may be disposed on the first capping layer CPL1. The thin film encapsulation layer TFE may protect the elements located under or below the thin film encapsulation layer TFE from external foreign substances or moisture. The thin film encapsulation layer TFE is commonly disposed in the first light emitting region EA1, the second light emitting region EA2, the third light emitting region EA3, and the non-light emitting region NELA. The thin film encapsulation layer TFE may completely cover the first capping layer CPL1.

[0173] The thin film encapsulation layer TFE may include a lower inorganic layer TFEa, an organic layer TFEb, and an upper inorganic layer TFEc that are sequentially stacked on the first capping layer CPL1.

[0174] The lower inorganic layer TFEa may completely cover the first capping layer CPL1 in the display area DA to cover the first light emitting element, the second light emitting element, and the third light emitting element.

[0175] The organic layer TFEb may be disposed on the lower inorganic layer TFEa to cover the first light emitting element, the second light emitting element, and the third light emitting element.

[0176] The upper inorganic layer TFEc may be disposed on the organic layer TFEb to completely cover the organic layer TFEb.

[0177] In an embodiment, each of the lower inorganic layer TFEa and the upper inorganic layer TFEc may be made of, but is not limited to, silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride (SiO x N y ) or lithium fluoride.

[0178] In an embodiment, the organic layer TFEb may be made of, but is not limited to, an acrylic resin, a methacrylic resin, a polyisoprene resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, or a perylene resin.

[0179] The light transmissive unit 300 may have a structure in which a second substrate 310, a color filter member 320, a second capping layer CPL2, a bank member BK, a light transmissive member, and a third capping layer CPL3 are sequentially stacked on the second side in a third direction DR3.

[0180] The light-transmitting unit 300 may have a structure in which the second substrate 310, the color filter member 320, the second cover layer CPL2, the light-transmitting member, the bank member BK, and the third cover layer CPL3 are sequentially stacked on the second side in the third direction DR3.

[0181] The second substrate 310 of the light-transmitting unit 300 may serve as a base of the light-transmitting unit 300. The second substrate 310 may be made of a light-transmitting material. The second substrate 310 may be a glass substrate or a plastic substrate. In the case where the second substrate 310 is a plastic substrate, it may be flexible. In an embodiment, in the case where the second substrate 310 is a plastic substrate, it may include, but is not limited to, polyimide. Since, as described above, the light-emitting unit 100 and the light-transmitting unit 300 face each other in the third direction DR3, the first substrate 110 of the light-emitting unit 100 and the second substrate 310 of the light-transmitting unit 300 may face each other in the third direction DR3.

[0182] The color filter member 320 of the light-transmitting unit 300 may be disposed on the second side of the second substrate 310 in the third direction DR3. For example, the color filter member 320 of the light-transmitting unit 300 may be disposed between the second substrate 310 and the light-emitting unit 100. The color filter member 320 may include a light-filtering pattern region and a light-blocking pattern portion BM. The light-blocking pattern portion BM may surround the light-filtering pattern region. The light-filtering pattern region of the color filter member 320 may define a light-transmitting region of the light-transmitting unit 300, and the light-blocking pattern portion BM may define a light-blocking region BA of the light-transmitting unit 300.

[0183] The color filter member 320 may include a first color filter CF1, a second color filter CF2, and a third color filter CF3. The first color filter CF1 may absorb both the second light and the third light other than the first light, the second color filter CF2 may absorb both the first light and the third light other than the second light, and the third color filter CF3 may absorb both the first light and the second light other than the third light. In other words, the first color filter CF1 may transmit the first light, the second color filter CF2 may transmit the second light, and the third color filter CF3 may transmit the third light.

[0184] In an embodiment, the first color filter CF1 may be a blue color filter and may include a blue colorant. As used herein, the term "colorant" is a concept that includes both dyes and pigments. The first color filter CF1 may include a base resin, and the blue colorant may be dispersed in the base resin. In an embodiment, the second color filter CF2 may be a green color filter and may include a green colorant. The second color filter CF2 may include a base resin, and the green colorant may be dispersed in the base resin. In an embodiment, the third color filter CF3 may be a red color filter and may include a red colorant. The third color filter CF3 may include a base resin, and the red colorant may be dispersed in the base resin.

[0185] The first color filter CF1 may include a first light filtering pattern region 321a and a first light blocking pattern region 321b surrounding the first light filtering pattern region 321a. The second color filter CF2 may include a second light filtering pattern region 322a and a second light blocking pattern region 322b surrounding the second light filtering pattern region 322a. The third color filter CF3 may include a third light filtering pattern region 323a and a third light blocking pattern region 323b surrounding the third light filtering pattern region 323a. For example, the first light filtering pattern region 321a of the first color filter CF1 may overlap with the first light transmissive region TA1, and the first light blocking pattern region 321b of the first color filter CF1 may surround the first light filtering pattern region 321a that overlaps with the first light transmissive region TA1. However, the first light blocking pattern region 321b of the first color filter CF1 may not overlap with the second light transmissive region TA2 and the third light transmissive region TA3, and may overlap with the light blocking region BA. The second light filtering pattern region 322a of the second color filter CF2 may overlap with the second light transmissive region TA2, and the second light blocking pattern region 322b of the second color filter CF2 may surround the second light filtering pattern region 322a that overlaps with the second light transmissive region TA2. However, the second light blocking pattern region 322b of the second color filter CF2 may not overlap with the first light transmissive region TA1 and the third light transmissive region TA3, and may overlap with the light blocking region BA. The third light filtering pattern region 323a of the third color filter CF3 may overlap with the third light transmissive region TA3, and the third light blocking pattern region 323b of the third color filter CF3 may surround the third light filtering pattern region 323a that overlaps with the third light transmissive region TA3. However, the third light blocking pattern region 323b of the third color filter CF3 may not overlap with the first light transmissive region TA1 and the second light transmissive region TA2, and may overlap with the light blocking region BA. In other words, the light filtering pattern regions of the color filter member 320 may include the first light filtering pattern region 321a of the first color filter CF1, the second light filtering pattern region 322a of the second color filter CF2, and the third light filtering pattern region 323a of the third color filter CF3, and the light blocking pattern portion BM may have a structure in which the first light blocking pattern region 321b of the first color filter CF1, the second light blocking pattern region 322b of the second color filter CF2, and the third light blocking pattern region 323b of the third color filter CF3 are stacked on one another.

[0186] The first light filtering pattern region 321a of the first color filter CF1 may serve as a blocking filter that blocks red light and green light. For example, the first light filtering pattern region 321a may selectively transmit first light (e.g., blue light), and may block or absorb second light (e.g., green light) and third light (e.g., red light).

[0187] The second light filtering pattern region 322a of the second color filter CF2 can be used as a blocking filter for blocking blue light and red light. For example, the second light filtering pattern region 322a can selectively transmit the second light (e.g., green light), and can block or absorb the first light (e.g., blue light) and the third light (e.g., red light).

[0188] The third light filtering pattern region 323a of the third color filter CF3 can be used as a blocking filter for blocking blue light and green light. For example, the third light filtering pattern region 323a can selectively transmit the third light (e.g., red light), and can block or absorb the first light (e.g., blue light) and the second light (e.g., green light).

[0189] In an embodiment, the light blocking pattern portion BM may have a structure in which the first light blocking pattern region 321b, the third light blocking pattern region 323b, and the second light blocking pattern region 322b are sequentially stacked on each other in the third direction DR3. However, the present disclosure is not limited thereto. For example, the light blocking pattern portion BM may not be composed of the above-described color filters CF1 to CF3, but may be formed of an organic light blocking material. For example, the light blocking pattern portion BM may be formed by coating and exposing an organic light blocking material. For ease of description, the case where the light blocking pattern portion BM has a structure in which the first light blocking pattern region 321b, the third light blocking pattern region 323b, and the second light blocking pattern region 322b are sequentially stacked on each other in the third direction DR3 will be described below. The light blocking pattern portion BM can absorb all of the first light, the second light, and the third light through the above configuration.

[0190] The low refractive index layer LR may be provided on the color filter member 320. The low refractive index layer LR may have a refractive index lower than the refractive indices of the first light transmissive member TPL, the second light transmissive member WCL1, and the third light transmissive member WCL2, which will be described later. Therefore, the low refractive index layer LR can cause total reflection of the light propagating from the first light transmissive member TPL, the second light transmissive member WCL1, and the third light transmissive member WCL2 to the low refractive index layer LR, thereby reusing the above light.

[0191] In an embodiment, the refractive index of the low refractive index layer LR may be 1.3 or less. When the refractive index of the low refractive index layer LR is 1.3 or less, since the refractive index of the low refractive index layer LR is quite different from the refractive indices of the first light transmissive member TPL, the second light transmissive member WCL1, and the third light transmissive member WCL2, total reflection of the light can occur sufficiently.

[0192] The low refractive index layer LR can compensate for and planarize the step difference caused by the light blocking pattern regions 321b, 322b, and 323b of the color filter member 320. Accordingly, the second cover layer CPL2 on the low refractive index layer LR can be formed to be flat.

[0193] The second capping layer CPL2 of the light transmissive unit 300 may be disposed on the surface of the low refractive index layer LR to cover the low refractive index layer LR. The second capping layer CPL2 may prevent damage or contamination to the light blocking pattern portion BM and the light filtering pattern region of the low refractive index layer LR and the color filter member 320 by preventing impurities such as moisture or air from penetrating from the outside into the low refractive index layer LR or the color filter member 320.

[0194] The second capping layer CPL2 may include an inorganic material. The second capping layer CPL2 may directly contact the low refractive index layer LR.

[0195] Based on Figure 4 ,the bank member BK of the light transmissive unit 300 may be disposed on the surface of the second side of the second capping layer CPL2 in the third direction DR3, and portions of the bank member BK may be spaced apart from each other in the second direction DR2 to form a space for accommodating a light transmissive member to be described later. For example, the bank member BK may define a space in which a light transmissive member to be described later is disposed. The bank member BK may directly contact the surface of the second side of the second capping layer CPL2 in the third direction DR3. In a plan view, the bank member BK may surround a light transmissive member to be described later. The bank member BK may overlap with the non-light emitting region NELA of the light emitting unit 100 and the light blocking region BA of the light transmissive unit 300. The bank member BK may not overlap with the light emitting regions EA1, EA2, and EA3 of the light emitting unit 100 and the light transmissive regions TA1, TA2, and TA3 of the light transmissive unit 300.

[0196] In an embodiment, the bank member BK may include, but is not limited to, a photocurable organic material or a photocurable organic material containing a light blocking material.

[0197] The light transmissive member of the light transmissive unit 300 may be disposed on the surface of the second side of the second capping layer CPL2 in the third direction DR3 that is exposed by the space between portions of the bank member BK. The light transmissive member may include a first light transmissive member TPL that overlaps with the first light transmissive region TA1, a second light transmissive member WCL1 that overlaps with the second light transmissive region TA2, and a third light transmissive member WCL2 that overlaps with the third light transmissive region TA3. The first light transmissive member TPL, the second light transmissive member WCL1, and the third light transmissive member WCL2 may be referred to as a wavelength conversion layer or a wavelength conversion material layer.

[0198] The first light transmissive member TPL may be disposed in the space defined by the bank member BK and may overlap with the first light emitting region EA1 and the first light transmissive region TA1 in the third direction DR3. The first light transmissive member TPL may directly contact the second capping layer CPL2 and the bank member BK.

[0199] The first light-transmitting member TPL may be a light-transmitting pattern that transmits incident light. For example, as described above, the output light LE provided by the first light-emitting element may be blue light, and may pass through the first light-transmitting member TPL and the first light-filtering pattern region 321a of the first color filter CF1 to exit the display device 1. In other words, the first output light L1 emitted from the first light-emitting region EA1 to the outside through the first light-transmitting region TA1 may be blue light.

[0200] The first light-transmitting member TPL may include a base resin 330 and a light-scattering body 331.

[0201] The base resin 330 may be made of an organic material having a high light transmittance. In an embodiment, the base resin 330 may include, but is not limited to, organic materials such as epoxy resin, acrylic resin, cardo resin, or imide resin.

[0202] The light-scattering body 331 may have a refractive index different from that of the base resin 330 and may form an optical interface with the base resin 330. The light-scattering body 331 may be light-scattering particles. The light-scattering body 331 may scatter incident light in any direction without substantially changing the wavelength of the incident light passing through the first light-transmitting region TA1, regardless of the incident direction of the incident light.

[0203] The light-scattering body 331 may be a material that scatters at least a part of the incident light and may include metal oxide particles or organic particles. In an embodiment, the light-scattering body 331 may include titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), or tin oxide (SnO2) as metal oxides, and may include acrylic resin or urethane resin as organic particles, but the present disclosure is not limited thereto.

[0204] The second light-transmitting member WCL1 may be disposed in the space defined by the bank member BK and may overlap the second light-emitting region EA2 and the second light-transmitting region TA2 in the third direction DR3. The second light-transmitting member WCL1 may be in direct contact with the second cover layer CPL2 and the bank member BK.

[0205] The second light-transmitting member WCL1 may be a wavelength conversion pattern that converts or shifts the peak wavelength of incident light to another given peak wavelength and outputs light having the given peak wavelength. For example, as described above, the output light LE provided by the second light-emitting element may be blue light, and when it passes through the second light-transmitting member WCL1 and the second light-filtering pattern region 322a of the second color filter CF2, the output light LE provided by the second light-emitting element may be converted into green light having a peak wavelength in the range of about 510 nm to about 550 nm. Accordingly, the green light may be emitted to the outside of the display device 1. In other words, the second output light L2 emitted to the outside through the second light-transmitting region TA2 from the second light-emitting region EA2 may be green light.

[0206] The second light-transmitting member WCL1 may include a base resin 330, a light scatterer 331 dispersed in the base resin 330, and a first wavelength shifter 332 dispersed in the base resin 330.

[0207] The first wavelength shifter 332 may convert or shift the peak wavelength of incident light to another given peak wavelength. The first wavelength shifter 332 may convert the output light LE, which is blue light provided by the second light-emitting element, into green light having a single peak wavelength in the range of about 510 nm to about 550 nm, and may output the green light.

[0208] In an embodiment, the first wavelength shifter 332 may be, but is not limited to, a quantum dot, a quantum rod, or a phosphor. For ease of description, the case where the first wavelength shifter 332 is a quantum dot will be described below. A quantum dot may be a particulate material that emits light of a given color when an electron transitions from the conduction band to the valence band. A quantum dot may be a semiconductor nanocrystal material. Quantum dots may have a given bandgap depending on their composition and size. Thus, quantum dots may absorb light and may emit light having a specific wavelength. Examples of the semiconductor nanocrystals of quantum dots include group-IV nanocrystals, II-VI compound nanocrystals, III-V compound nanocrystals, IV-VI compound nanocrystals, and combinations thereof.

[0209] The II-VI group compounds can be selected from binary compounds (selected from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof), ternary compounds (selected from CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, and mixtures thereof), and quaternary compounds (selected from HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, and mixtures thereof).

[0210] The III-V group compounds can be selected from binary compounds (selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof), ternary compounds (selected from GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb, and mixtures thereof), and quaternary compounds (selected from GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof).

[0211] The IV-VI group compounds can be selected from binary compounds (selected from SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof), ternary compounds (selected from SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof), and quaternary compounds (selected from SnPbSSe, SnPbSTe, SnPbSeTe, and mixtures thereof). The Group IV elements can be selected from silicon (Si), germanium (Ge), and mixtures thereof. The Group IV compounds can be binary compounds (selected from silicon carbide (SiC), silicon germanide (SiGe), and mixtures thereof).

[0212] Here, the binary compound, ternary compound or quaternary compound may be present in the particles at a uniform concentration, or may be present in the same particle at partially different concentrations. They may have a core-shell structure in which a shell surrounds a core. The interface between the core and the shell may have a concentration gradient in which the concentration of the elements present in the shell decreases towards the center of the shell.

[0213] In an embodiment, the quantum dots may have a core-shell structure including a core containing the above-described nanocrystals and a shell surrounding the core. The shell of each quantum dot may serve as a protective layer for maintaining semiconductor properties by preventing chemical denaturation of the core and / or a charging layer for imparting electrophoretic properties to the quantum dots. The shell may be a single layer or multiple layers. The shell of each quantum dot may be, for example, a metal or non-metal oxide, a semiconductor compound, or a combination thereof.

[0214] For example, the metal or non-metal oxide may be, but is not limited to, binary compounds such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4 or NiO, or ternary compounds such as MgAl2O4, CoFe2O4, NiFe2O4 or CoMn2O4.

[0215] The semiconductor compound may be, but is not limited to, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP or AlSb.

[0216] The light emitted from the first wavelength shifter 332 may have a full width at half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, about 40 nm or less, or about 30 nm or less. Therefore, the color purity and color reproducibility of the display device 1 can be further improved. The light emitted from the first wavelength shifter 332 may be radiated in all directions regardless of the incident direction of the incident light. Therefore, the lateral visibility of the second color displayed in the second light-transmitting region TA2 can be improved.

[0217] A part of the output light LE provided by the second light-emitting element can be transmitted through the second light-transmitting member WCL1 without being converted into green light by the first wavelength shifter 332. In the output light LE, the component that is incident on the second light-filtering pattern region 322a of the second color filter CF2 and is not wavelength-converted by the second light-transmitting member WCL1 can be blocked by the second light-filtering pattern region 322a. On the other hand, the green light that the output light LE has been converted into by the second light-transmitting member WCL1 can be transmitted through the second light-filtering pattern region 322a and can be emitted to the outside. For example, the second output light L2 emitted to the outside of the display device 1 through the second light-transmitting region TA2 can be green light.

[0218] The third light-transmitting member WCL2 can be disposed in the space defined by the bank member BK and can overlap the third light-emitting region EA3 and the third light-transmitting region TA3 in the third direction DR3. The third light-transmitting member WCL2 can be in direct contact with the second cover layer CPL2 and the bank member BK.

[0219] The third light-transmitting member WCL2 can be a wavelength-converting pattern that converts or shifts the peak wavelength of the incident light into another given peak wavelength and outputs light having the given peak wavelength. For example, as described above, the output light LE provided by the third light-emitting element can be blue light, and when it passes through the third light-transmitting member WCL2 and the third light-filtering pattern region 323a of the third color filter CF3, the output light LE provided by the third light-emitting element can be converted into red light having a peak wavelength in the range of about 610 nm to about 650 nm. Accordingly, the red light can be emitted to the outside of the display device 1. In other words, the third output light L3 emitted to the outside from the third light-emitting region EA3 through the third light-transmitting region TA3 can be red light.

[0220] The third light-transmitting member WCL2 can include a base resin 330, a light-scattering body 331 dispersed in the base resin 330, and a second wavelength shifter 333 dispersed in the base resin 330.

[0221] The second wavelength shifter 333 can convert or shift the peak wavelength of the incident light into another given peak wavelength. The second wavelength shifter 333 can convert the output light LE, which is blue light provided by the third light-emitting element, into red light having a single peak wavelength in the range of about 610 nm to about 650 nm and can output the red light. In an embodiment, the second wavelength shifter 333 can be, but is not limited to, a quantum dot, a quantum rod, or a phosphor. In the case where the second wavelength shifter 333 is a quantum dot, it can have a composition that is substantially the same as the composition of the first wavelength shifter 332 in the case where the first wavelength shifter 332 is a quantum dot. Therefore, the description of the second wavelength shifter 333 will be omitted.

[0222] A part of the output light LE provided by the third light-emitting element can transmit through the third light-transmitting member WCL2 without being converted into red light by the second wavelength shifter 333. In the output light LE, the component that is incident on the third filter pattern region 323a of the third color filter CF3 without being wavelength-converted by the third light-transmitting member WCL2 can be blocked by the third filter pattern region 323a. On the other hand, the red light that the output light LE has been converted into by the third light-transmitting member WCL2 can transmit through the third filter pattern region 323a and can be emitted to the outside. For example, the third output light L3 emitted to the outside of the display device 1 through the third light-transmitting region TA3 can be red light.

[0223] The third cover layer CPL3 of the light-transmitting unit 300 can be disposed on the bank member BK, the first light-transmitting member TPL, the second light-transmitting member WCL1, and the third light-transmitting member WCL2 to prevent damage or contamination to the first light-transmitting member TPL, the second light-transmitting member WCL1, and the third light-transmitting member WCL2 by preventing impurities such as moisture or air from penetrating from the outside into the first light-transmitting member TPL, the second light-transmitting member WCL1, and the third light-transmitting member WCL2. The third cover layer CPL3 can cover the first light-transmitting member TPL, the second light-transmitting member WCL1, and the third light-transmitting member WCL2.

[0224] As described above, the filler 500 can be located between the light-emitting unit 100 and the light-transmitting unit 300 to fill the space between the light-emitting unit 100 and the light-transmitting unit 300. For example, in an embodiment, the filler 500 can directly contact the upper inorganic layer TFEc of the thin film encapsulation layer TFE of the light-emitting unit 100 and the third cover layer CPL3 of the light-transmitting unit 300. However, the present disclosure is not limited thereto.

[0225] In an embodiment, the filler 500 can be made of a material having a substantially zero extinction coefficient. The refractive index and the extinction coefficient are related, and the extinction coefficient decreases as the refractive index decreases. When the refractive index is below 1.7, the extinction coefficient can converge to substantially zero. In an embodiment, the filler 500 can be made of a material having a refractive index of 1.7 or less. Accordingly, it is possible to prevent the light provided by the self-luminous element from being absorbed by the filler 500 when it passes through the filler 500, or the absorption of light by the filler 500 can be minimized. In an embodiment, the filler 500 can be made of an organic material having a refractive index of 1.4 to 1.6.

[0226] Figure 6 is a schematic diagram of the equivalent circuit of the first pixel PX1 of the display device 1 according to an embodiment.

[0227] Reference Figure 6, the first pixel PX1 of the display device 1 according to an embodiment may include a light-emitting element EL, transistors T1 to T3, and a storage capacitor Cst.

[0228] The light-emitting element EL emits light according to the current supplied through the first transistor T1. The light-emitting element EL may include a first electrode (e.g., an anode), a second electrode (e.g., a cathode), and at least one light-emitting layer disposed therebetween. The light-emitting layer may emit light within a given wavelength range in response to electrical signals received from the first electrode and the second electrode.

[0229] The first electrode of the light-emitting element EL may be connected to the source electrode of the first transistor T1, and the second electrode of the light-emitting element EL may be connected to a common voltage line VSL that is supplied with a common voltage ELVSS lower than the driving voltage ELVDD of the driving voltage line VDL.

[0230] The first transistor T1 adjusts the current flowing from the driving voltage line VDL supplied with the driving voltage ELVDD to the light-emitting element EL according to the voltage difference between the gate electrode and the source electrode. For example, the first transistor T1 may be a driving transistor for driving the light-emitting element EL. The first transistor T1 may have a gate electrode connected to the source electrode of the second transistor T2, a source electrode connected to the first electrode of the light-emitting element EL, and a drain electrode connected to the driving voltage line VDL to which the driving voltage ELVDD is applied.

[0231] The second transistor T2 is turned on by the scan signal SS of the scan line SL to connect the first data line DL1 to the gate electrode of the first transistor T1. The second transistor T2 may have a gate electrode connected to the scan line SL, a source electrode connected to the gate electrode of the first transistor T1, and a drain electrode connected to the first data line DL1. A data voltage Vd may be applied to the first data line DL1.

[0232] The third transistor T3 is turned on by the scan signal SS of the scan line SL to connect the initialization voltage line VIL supplied with the initialization voltage VINT to the first electrode of the light-emitting element EL. The third transistor T3 may have a gate electrode connected to the scan line SL, a drain electrode connected to the initialization voltage line VIL, and a source electrode connected to the first electrode of the light-emitting element EL or the source electrode of the first transistor T1.

[0233] In an embodiment, the source electrodes and drain electrodes of each of the transistors T1 to T3 are not limited to the above description, and the situation may also be reversed. Each of the transistors T1 to T3 may be formed as a thin-film transistor. Although in Figure 6The case where each of the transistors T1 to T3 is an n-type metal oxide semiconductor field effect transistor (MOSFET) has been described in [reference], but the present disclosure is not limited thereto. For example, each of the transistors T1 to T3 may also be formed as a p-type MOSFET, or some of the transistors T1 to T3 may be formed as n-type MOSFETs and others may be formed as p-type MOSFETs.

[0234] A storage capacitor Cst is formed between the gate electrode and the source electrode of the first transistor T1. The storage capacitor Cst stores a voltage corresponding to the difference between the gate voltage and the source voltage of the first transistor T1.

[0235] In Figure 6 In the embodiment of [reference], the gate electrodes of the second transistor T2 and the third transistor T3 are connected to the same scan line SL. Therefore, the second transistor T2 and the third transistor T3 are simultaneously turned on by a scan signal SS transmitted from the same scan line SL. However, the present disclosure is not limited to this case. The gate electrode of the second transistor T2 may be connected to any scan line SL, and the gate electrode of the third transistor T3 may be connected to another scan line SL different from the above scan line SL.

[0236] The second pixel PX2 and the third pixel PX3 may have the same circuit structure as Figure 6 the first pixel PX1 of [reference].

[0237] Figure 7 is a schematic plan view of the display device 1 according to an embodiment.

[0238] As Figure 7 shown in [reference], the display device 1 may include unit pixels UPX1 to UPX16. The unit pixels UPX1 to UPX16 may be respectively disposed in regions (hereinafter, referred to as unit regions) surrounded and defined by a common voltage line VSL and a common connection electrode CCE that intersect each other. For example, the unit region may be defined by a common voltage line VSL extending along a first direction DR1 and arranged (or disposed) along a second direction DR2 and a common connection electrode CCE extending along the second direction DR2 and arranged along the first direction DR1. Therefore, the unit pixels UPX1 to UPX16 may be respectively disposed in the unit regions. According to an embodiment, in Figure 7 in [reference], sixteen unit pixels UPX1 to UPX16 are respectively disposed in sixteen unit regions. The common voltage line VSL and the common connection electrode CCE may be connected to each other through a via hole DRH at their intersection points. In other words, the via holes DRH may be respectively disposed in the intersection regions of the common voltage line VSL and the common connection electrode CCE.

[0239] A unit pixel (e.g., UPX2) may include a first pixel PX1, a second pixel PX2, and a third pixel PX3 that are arranged adjacent to each other. In other words, the first pixel PX1, the second pixel PX2, and the third pixel PX3 that are adjacent to each other may form a unit pixel.

[0240] The first pixel PX1 may include a first pixel electrode PE1 and a first pixel connection electrode PCE1. The first pixel connection electrode PCE1 may connect the first pixel electrode PE1 and a first transistor T1 of the first pixel PX1. The first pixel electrode PE1 may be connected to the first pixel connection electrode PCE1 through a contact hole in an insulating layer. The first pixel electrode PE1 may be arranged to correspond to a first light-emitting region EA1 defined by a pixel defining layer PDL. The pixel defining layer PDL may overlap an edge of the first pixel electrode PE1. At least a part of the first pixel electrode PE1 may have an arc shape. For example, the first pixel electrode PE1 may have a fan shape in a plan view.

[0241] The second pixel PX2 may include a second pixel electrode PE2 and a second pixel connection electrode PCE2. The second pixel connection electrode PCE2 may connect the second pixel electrode PE2 and a first transistor T1 of the second pixel PX2. The second pixel electrode PE2 may be connected to the second pixel connection electrode PCE2 through a contact hole in an insulating layer. The second pixel electrode PE2 may be arranged to correspond to a second light-emitting region EA2 defined by a pixel defining layer PDL. The pixel defining layer PDL may overlap an edge of the second pixel electrode PE2. At least a part of the second pixel electrode PE2 may have an arc shape. For example, the second pixel electrode PE2 may have a fan shape in a plan view.

[0242] The third pixel PX3 may include a third pixel electrode PE3 and a third pixel connection electrode PCE3. The third pixel connection electrode PCE3 may connect the third pixel electrode PE3 and a first transistor T1 of the third pixel PX3. The third pixel electrode PE3 may be connected to the third pixel connection electrode PCE3 through a contact hole in an insulating layer. The third pixel electrode PE3 may be arranged to correspond to a third light-emitting region EA3 defined by a pixel defining layer PDL. The pixel defining layer PDL may overlap an edge of the third pixel electrode PE3. At least a part of the third pixel electrode PE3 may have an arc shape. For example, the third pixel electrode PE3 may have a fan shape in a plan view.

[0243] The first pixel electrode PE1, the second pixel electrode PE2, and the third pixel electrode PE3 included in a unit pixel (e.g., UPX2) may form a substantially circular shape. For example, the pixel electrodes included in a unit pixel may each have a sector shape. In this case, a curve extending along the arc of the pixel electrodes included in the unit pixel may form a circle.

[0244] In an embodiment, the central angle of each of the first pixel electrode PE1, the second pixel electrode PE2, and the third pixel electrode PE3 may be 120 degrees. However, the central angle of each of the pixel electrodes PE1 to PE3 is not limited thereto and may vary according to the shape and position of the pixel electrodes PE1, PE2, or PE3.

[0245] In an embodiment, at least a portion of the first light-emitting region EA1, at least a portion of the second light-emitting region EA2, and at least a portion of the third light-emitting region EA3 may have an arc shape. For example, each of the first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 may have a sector shape.

[0246] In an embodiment, the central angle of each of the first light-emitting region EA1, the second light-emitting region EA2, and the third light-emitting region EA3 may be 120 degrees. However, the central angle of each of the light-emitting regions EA1 to EA3 is not limited thereto and may vary according to the shape and position of the light-emitting regions EA1, EA2, or EA3.

[0247] Figure 8 is provided to be Figure 7 a schematic plan view of the color filter member 320 corresponding to each unit pixel of

[0248] As Figure 8 shown in Figure 8 sixteen color filter members 320 arranged to correspond to sixteen unit pixels UPX1 to UPX16 are shown.

[0249] Each of the color filter members 320 may include a first color filter CF1, a second color filter CF2, and a third color filter CF3 that are arranged adjacent to each other. In other words, the first color filter CF1, the second color filter CF2, and the third color filter CF3 adjacent to each other may form each of the color filter members 320.

[0250] The first color filter CF1 may be a blue color filter that transmits the first light (e.g., blue light) as described above. At least a portion of the first color filter CF1 may have an arc shape. For example, the first color filter CF1 may have a sector shape in a plan view. The first color filter CF1 may be disposed corresponding to the first pixel electrode PE1 and the first light-emitting region EA1 as described above. The first color filter CF1, the first pixel electrode PE1, and the first light-emitting region EA1 may have similar sector shapes to each other.

[0251] The second color filter CF2 may be a green color filter that transmits the second light (e.g., green light) as described above. At least a portion of the second color filter CF2 may have an arc shape. For example, the second color filter CF2 may have a sector shape in a plan view. The second color filter CF2 may be disposed corresponding to the second pixel electrode PE2 and the second light-emitting region EA2 as described above. The second color filter CF2, the second pixel electrode PE2, and the second light-emitting region EA2 may have similar sector shapes to each other.

[0252] The third color filter CF3 may be a red color filter that transmits the third light (e.g., red light) as described above. At least a portion of the third color filter CF3 may have an arc shape. For example, the third color filter CF3 may have a sector shape in a plan view. The third color filter CF3 may be disposed corresponding to the third pixel electrode PE3 and the third light-emitting region EA3 as described above. The third color filter CF3, the third pixel electrode PE3, and the third light-emitting region EA3 may have similar sector shapes to each other.

[0253] In an embodiment, the central angle of each of the first color filter CF1, the second color filter CF2, and the third color filter CF3 may be 120 degrees. However, the central angle of each of the color filters CF1 to CF3 is not limited thereto and may vary according to the shape and position of the color filters CF1, CF2, or CF3.

[0254] In an embodiment, as described in detail below, the same color filters of adjacent unit pixels may be disposed in different regions.

[0255] For example, each of the unit pixels UPX1 to UPX16 may have a square shape. The unit pixel (e.g., UPX1) may be divided into four pixel regions PA1 to PA4 by an imaginary first diagonal line LL1 connecting two vertices facing each other in the diagonal direction among the four vertices of the unit pixel and an imaginary second diagonal line LL2 connecting the other two vertices facing each other in the diagonal direction. For example, each unit pixel may include a first pixel region PA1 provided on the upper side of the unit pixel, a second pixel region PA2 provided on the left side of the unit pixel, a third pixel region PA3 provided on the lower side of the unit pixel, and a fourth pixel region PA4 provided on the right side of the unit pixel. Each of the pixel regions PA1 to PA4 may have a triangular shape.

[0256] Among the color filters of the unit pixels adjacent to each other in one direction (e.g., the second direction DR2), the color filters of the same color may have centers (e.g., the centers of arcs) provided in different pixel regions. Here, the center of the arc refers to the center of the arc of the color filter having a sector shape. For example, the first unit pixel UPX1 and the second unit pixel UPX2 are provided adjacent to each other in the second direction DR2. Here, the center CP1 of the arc of the first color filter CF1 in the first unit pixel UPX1 may be provided in the first pixel region PA1, and the center CP1 of the arc of the first color filter CF1 in the second unit pixel UPX2 may be provided in the second pixel region PA2. The center CP2 of the arc of the second color filter CF2 in the first unit pixel UPX1 may be provided in the fourth pixel region PA4, and the center CP2 of the arc of the second color filter CF2 in the second unit pixel UPX2 may be provided in the first pixel region PA1. The center CP3 of the arc of the third color filter CF3 in the first unit pixel UPX1 may be provided in the second pixel region PA2, and the center CP3 of the arc of the third color filter CF3 in the second unit pixel UPX2 may be provided in the third pixel region PA3.

[0257] According to an embodiment, color filter members 320 of unit pixels adjacent to each other in one direction (e.g., the second direction DR2) may have different shapes. In other words, positions of color filters CF1 to CF3 in unit pixels adjacent to each other in this direction may be different from each other. For example, a first unit pixel UPX1 and a second unit pixel UPX2 may be arranged adjacent to each other in the second direction DR2. Here, the color filter member 320 of the second unit pixel UPX2 may have a shape rotated 90 degrees counterclockwise with respect to the color filter member 320 of the first unit pixel UPX1. For example, the first color filter CF1 of the second unit pixel UPX2 may have a shape rotated 90 degrees counterclockwise with respect to the first color filter CF1 of the first unit pixel UPX1. As an example, an imaginary line connecting the center CP1 of the arc of the first color filter CF1 provided in the first unit pixel UPX1 and the center of the first color filter CF1 provided in the first unit pixel UPX1 (e.g., a portion connected by two line segments defining a central angle of the first color filter CF1 provided in the first unit pixel UPX1) may be defined as a first center line. An imaginary line connecting the center CP1 of the arc of the first color filter CF1 provided in the second unit pixel UPX2 and the center of the first color filter CF1 provided in the second unit pixel UPX2 (e.g., a portion connected by two line segments defining a central angle of the first color filter CF1 provided in the second unit pixel UPX2) may be defined as a second center line. In this case, an angle formed by the first center line and the second center line may be approximately 90 degrees. For example, an angle between an imaginary first line extending along the first center line and an imaginary second line extending along the second center line may be approximately 90 degrees. Accordingly, as in the above example, although the center CP1 of the arc of the first color filter CF1 provided in the first unit pixel UPX1 is provided in the first pixel region PA1 of the first unit pixel UPX1, the center CP1 of the arc of the first color filter CF1 provided in the second unit pixel UPX2 may be provided in the second pixel region PA2 of the second unit pixel UPX2.

[0258] According to an embodiment, as in Figure 8In the example shown, the color filter member 320 of the third unit pixel UPX3 may have a shape that is rotated counterclockwise by approximately 180 degrees with respect to the color filter member 320 of the second unit pixel UPX2. As an example, an imaginary line connecting the center CP1 of the arc of the first color filter CF1 provided in the second unit pixel UPX2 and the center of the first color filter CF1 provided in the second unit pixel UPX2 may be defined as the second center line. An imaginary line connecting the center of the arc of the first color filter CF1 provided in the third unit pixel UPX3 and the center of the first color filter CF1 provided in the third unit pixel UPX3 may be defined as the third center line. In this case, the angle formed by the second center line and the third center line may be approximately 180 degrees. For example, the angle between an imaginary second line extending along the second center line and an imaginary third line extending along the third center line may be approximately 180 degrees.

[0259] According to an embodiment, the color filter member 320 of the fourth unit pixel UPX4 may have a shape that is rotated clockwise by approximately 90 degrees with respect to the color filter member 320 of the third unit pixel UPX3.

[0260] According to an embodiment, the color filter members 320 of unit pixels adjacent to each other in another direction (e.g., the first direction DR1) intersecting the above-mentioned one direction may have the same shape. In other words, the color filters in the color filter members 320 of unit pixels adjacent to each other in the other direction may be arranged identically to each other. For example, since the first unit pixel UPX1 and the fifth unit pixel UPX5 are adjacent to each other in the first direction DR1, the color filter member 320 of the fifth unit pixel UPX5 may have the same shape as the color filter member 320 of the first unit pixel UPX1. For example, the first color filter CF1 of the fifth unit pixel UPX5 and the first color filter CF1 of the first unit pixel UPX1 may have the same shape and may face the same direction. As in the Figure 8 example shown, the color filter members 320 of the unit pixels arranged along the first direction DR1 may have the same shape.

[0261] As Figure 8 shown, in the case where the first to sixteenth unit pixels UPX1 to UPX16 arranged in a 4×4 matrix form are defined as a unit pixel group, the display device 1 may include a plurality of unit pixel groups. For example, Figure 8 the unit pixel groups may be repeated along the second direction DR2 and may be repeated along the first direction DR1.

[0262] As described above, in unit pixels adjacent to each other in one direction (e.g., the second direction DR2), the arrangements of color filters are different. Thus, color filters facing the upper edge 555 of the unit pixel group (e.g., an edge extending along the second direction DR2) can have various colors, thereby minimizing the color moiré phenomenon. For example, color filters facing the upper edge 555 of the unit pixel group (or adjacent to the upper edge 555 of the unit pixel group) can include a first color filter CF1 of the first unit pixel UPX1, a first color filter CF1 and a second color filter CF2 of the second unit pixel UPX2, a first color filter CF1 and a third color filter CF3 of the third unit pixel UPX3, and a second color filter CF2 and a third color filter CF3 of the fourth unit pixel UPX4. In other words, color filters facing the upper edge 555 of the unit pixel group can include a first color filter CF1 of a first color (e.g., blue), a second color filter CF2 of a second color (e.g., green), and a third color filter CF3 of a third color (e.g., red). Since color filters of various colors are uniformly arranged at the upper edge 555 of the unit pixel group, blue light, green light, and red light can be uniformly distributed at the upper edge 555 of the unit pixel group. According to an embodiment, since color filters of various colors are uniformly arranged at the lower edge 666 of the unit pixel group, blue light, green light, and red light can be uniformly distributed at the lower edge 666 of the unit pixel group. Thus, according to an embodiment, it is possible to minimize the color (e.g., light blue and light green) moiré phenomenon that may occur in a structure in which color filters of one color are arranged along the upper edge 555 or the lower edge 666 of the unit pixel group. The display device 1 according to an embodiment can have, for example, a color moiré index of about 0.6.

[0263] For example, in a case where a selectable-size all-white box pattern is displayed on an all-black background, a color moiré phenomenon can be found at the upper edge of the all-white box pattern or at the lower edge of the all-white box pattern.

[0264] According to an embodiment, each light-transmitting member can have the same shape as the shape of the color filter described above. For example, the first light-transmitting member TPL can have a fan shape identical to the fan shape of the first color filter CF1, the second light-transmitting member WCL1 can have a fan shape identical to the fan shape of the second color filter CF2, and the third light-transmitting member WCL2 can have a fan shape identical to the fan shape of the third color filter CF3.

[0265] According to an embodiment, each drilling DRH, which will be described later, can be provided between adjacent unit pixels. For example, each drilling DRH can be provided at the center of a group of four adjacent unit pixels.

[0266] Figure 9 is an array view of the display device 1 according to an embodiment. Figure 10is taken along Figure 9 the line X2-X2’ of the schematic cross-sectional view. Here, Figure 9 may be, for example, the array view of the second unit pixel UPX2 of the above Figure 7 and Figure 8 .

[0267] As Figure 9 shown, each of the first pixel PX1, the second pixel PX2, and the third pixel PX3 may include the first transistor T1, the second transistor T2, the third transistor T3, and the storage capacitor Cst as described above.

[0268] The second transistor T2 of the first pixel PX1 may be connected to the first data line DL1, the second transistor T2 of the second pixel PX2 may be connected to the second data line DL2, and the second transistor T2 of the third pixel PX3 may be connected to the third data line DL3.

[0269] Since the array structures of the first pixel PX1, the second pixel PX2, and the third pixel PX3 are the same, the array structure of the first pixel PX1 will be described below as a representative example.

[0270] As Figure 9 and Figure 10 shown, the display device 1 may include a substrate SUB, a thin film transistor layer TFTL, a light emitting element layer EMTL, and a thin film encapsulation layer TFE. The thin film transistor layer TFTL, the light emitting element layer EMTL, and the thin film encapsulation layer TFE may be sequentially disposed on the substrate SUB along the third direction DR3. Here, the thin film transistor layer TFTL may include the first transistor T1, the second transistor T2, the third transistor T3, and the storage capacitor Cst described above.

[0271] The substrate SUB may be a rigid substrate, or may be a flexible substrate that can be bent, folded, or curled. The substrate SUB may be made of an insulating material such as glass, quartz, or a polymer resin. The polymer resin may be, for example, polyethersulfone (PES), polyacrylate (PA), polyarylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallyl ester, polyimide (PI), polycarbonate (PC), triacetyl cellulose (CAT), cellulose acetate propionate (CAP), or a combination thereof. As an example, the first substrate SUB may include a metal material.

[0272] The first pattern layer may be disposed on the substrate SUB. The first pattern layer may include, for example, a first data line DL1, a second data line DL2’, a light blocking layer BML2, an initialization voltage line VIL, and a driving voltage line VDL. The reference numeral “DL2’” indicates a data line connected to another pixel.

[0273] The first data line DL1 may extend along a first direction DR1.

[0274] The light blocking layer BML2 may be made of, for example, a metal material such as chromium (Cr) or molybdenum (Mo), black ink, or black dye. In the case where the light blocking layer BML2 is made of a metal material, static electricity may be supplied thereto. Accordingly, the light blocking layer BML2 may not be electrically floating, and the electrical characteristics of the transistors on the light blocking layer BML2 may be stabilized.

[0275] The initialization voltage line VIL may extend along the first direction DR1.

[0276] A buffer layer BF may be disposed on the first pattern layer. For example, as in the example shown in Figure 10 the buffer layer BF may be disposed on the second data line DL2’, the light blocking layer BML2, the initialization voltage line VIL, and the driving voltage line VDL. The buffer layer BF may be a layer for protecting the transistors T1 to T3 of the thin film transistor layer TFTL and the light emitting layer OL of the light emitting element layer EMTL from moisture introduced through the substrate SUB vulnerable to moisture penetration. The buffer layer BF may be composed of inorganic layers stacked alternately with each other. For example, the buffer layer BF may be a plurality of layers in which a plurality of inorganic layers selected from a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, and an aluminum oxide layer are stacked alternately with each other.

[0277] A second pattern layer may be disposed on the buffer layer BF. As shown in Figure 9 and Figure 10 the second pattern layer may include a first active layer ACT1 and a second active layer ACT2. The first active layer ACT1 and the second active layer ACT2 may overlap the first pattern layer thereunder. For example, as shown in Figure 10 the first active layer ACT1 may be disposed on the buffer layer BF to overlap the light blocking layer BML2 and the driving voltage line VDL.

[0278] The first active layer ACT1 and the second active layer ACT2 may be active layers made of low temperature polycrystalline silicon (LTPS). The first active layer ACT1 and the second active layer ACT2 may be oxide-based active layers. For example, each of the first active layer ACT1 and the second active layer ACT2 may be an oxide semiconductor including indium gallium zinc oxide (IGZO) or indium gallium zinc tin oxide (IGZTO).

[0279] The gate insulating layer GI can be disposed on the second pattern layer. For example, as Figure 10 shown, the gate insulating layer GI can be disposed on the first active layer ACT1.

[0280] The gate insulating layer GI can include at least one of tetraethyl orthosilicate (TEOS), silicon nitride (SiN x ), and silicon oxide (SiO2). For example, the gate insulating layer GI can have a bilayer structure in which a silicon nitride layer having a thickness of about 40 nm and a tetraethyl orthosilicate layer having a thickness of about 80 nm are stacked in sequence with each other.

[0281] The third pattern layer can be disposed on the gate insulating layer GI. As Figure 9 and Figure 10 shown, the third pattern layer can include a first gate electrode GE1, a second gate electrode GE2, and a third gate electrode GE3. The first gate electrode GE1 and the third gate electrode GE3 can be disposed on the gate insulating layer GI to overlap with the first active layer ACT1, and the second gate electrode GE2 can be disposed on the gate insulating layer GI to overlap with the second active layer ACT2.

[0282] The first gate electrode GE1 can overlap with the light blocking layer BML2, with the gate insulating layer GI and the buffer layer BF disposed therebetween. The first storage capacitor can be formed in the portion of the first gate electrode GE1 that overlaps with the above-mentioned light blocking layer BML2. In other words, the first storage capacitor can be formed by the first gate electrode GE1 and the light blocking layer BML2.

[0283] The portion of the first active layer ACT1 that overlaps with the first gate electrode GE1 can be the channel region CH of the first transistor T1, and the portions of the first active layer ACT1 that do not overlap with the first gate electrode GE1 and are separated by the first gate electrode GE1 in the plan view can be the first drain electrode DE1 and the first source electrode SE1 of the first transistor T1, respectively.

[0284] The portion of the first active layer ACT1 that overlaps with the third gate electrode GE3 can be the channel region of the third transistor T3, and the portions of the first active layer ACT1 that do not overlap with the third gate electrode GE3 and are separated by the third gate electrode GE3 in the plan view can be the third drain electrode DE3 and the third source electrode SE3 of the third transistor T3, respectively.

[0285] The portion of the second active layer ACT2 that overlaps with the second gate electrode GE2 can be the channel region of the second transistor T2, and the portions of the second active layer ACT2 that do not overlap with the second gate electrode GE2 and are separated by the second gate electrode GE2 in the plan view can be the second drain electrode DE2 and the second source electrode SE2 of the second transistor T2, respectively.

[0286] The interlayer insulating layer ITL may be disposed on the third pattern layer. For example, as Figure 10 shown, the interlayer insulating layer ITL may be disposed on the first gate electrode GE1.

[0287] The interlayer insulating layer ITL may include an inorganic layer such as a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The interlayer insulating layer ITL may include a plurality of inorganic layers.

[0288] The fourth pattern layer may be disposed on the interlayer insulating layer ITL. As Figure 9 and Figure 10 shown, the fourth pattern layer may include a gate connection electrode GCE, a drain connection electrode DCE, a source connection electrode SCE, a data connection electrode DTCE, an initialization connection electrode VICE, and a scan line SL.

[0289] The gate connection electrode GCE may be connected to the first gate electrode GE1 of the first transistor T1 through a fourth contact hole CT4 passing through the interlayer insulating layer ITL. The gate connection electrode GCE may be connected to the second source electrode SE2 of the second transistor T2 through a fifth contact hole CT5 passing through the interlayer insulating layer ITL.

[0290] The drain connection electrode DCE may be connected to the first drain electrode DE1 of the first transistor T1 through a first contact hole CT1 passing through the interlayer insulating layer ITL. The drain connection electrode DCE may be connected to the driving voltage line VDL through a second contact hole CT2 passing through the interlayer insulating layer ITL and the buffer layer BF.

[0291] The source connection electrode SCE may be connected to the first source electrode SE1 of the first transistor T1 through an eleventh contact hole CT11 passing through the interlayer insulating layer ITL. The source connection electrode SCE may be connected to the light blocking layer BML2 through a ninth contact hole CT9 passing through the interlayer insulating layer ITL and the buffer layer BF. The source connection electrode SCE may overlap with the first gate electrode GE1, with the interlayer insulating layer ITL therebetween. A second storage capacitor may be formed in the portion of the source connection electrode SCE overlapping with the first gate electrode GE1. In other words, the second storage capacitor may be formed by the source connection electrode SCE and the first gate electrode GE1. The above storage capacitor Cst may include a first storage capacitor and a second storage capacitor.

[0292] The data connection electrode DTCE may be connected to the first data line DL1 through an eighth contact hole CT8 passing through the interlayer insulating layer ITL and the buffer layer BF. The data connection electrode DTCE may be connected to the second drain electrode DE2 of the second transistor T2 through a sixth contact hole CT6 passing through the interlayer insulating layer ITL.

[0293] The initialization connection electrode VICE can be connected to the initialization voltage line VIL through the thirteenth contact hole CT13 that penetrates the interlayer insulating layer ITL and the buffer layer BF. The initialization connection electrode VICE can be connected to the third drain electrode DE3 of the third transistor T3 through the twelfth contact hole CT12 that penetrates the interlayer insulating layer ITL.

[0294] The scan line SL can be connected to the third gate electrode GE3 through the fifteenth contact hole CT15 that penetrates the interlayer insulating layer ITL. The scan line SL can be connected to the second gate electrode GE2 through the sixteenth contact hole CT16 that penetrates the interlayer insulating layer ITL.

[0295] The first passivation layer PAS1 can be disposed on the fourth pattern layer. For example, as Figure 10 shown, the first passivation layer PAS1 can be disposed on the initialization connection electrode VICE, the drain connection electrode DCE, and the source connection electrode SCE. The first passivation layer PAS1 can include an inorganic layer.

[0296] The first planarization layer VA1 can be disposed on the first passivation layer PAS1. The first planarization layer VA1 can include an organic layer such as an acrylic resin layer, an epoxy resin layer, a phenolic resin layer, a polyamide resin layer, or a polyimide resin layer.

[0297] The fifth pattern layer can be disposed on the first planarization layer VA1. As Figure 9 and Figure 10 shown, the fifth pattern layer can include a first pixel connection electrode PCE1, a second pixel connection electrode PCE2, a third pixel connection electrode PCE3, and a common voltage line VSL.

[0298] The first pixel connection electrode PCE1 can be connected to the source connection electrode SCE through the third contact hole CT3 that penetrates the first planarization layer VA1 and the first passivation layer PAS1.

[0299] The common voltage line VSL can extend along the first direction DR1.

[0300] The second passivation layer PAS2 can be disposed on the fifth pattern layer. For example, as Figure 10 shown, the second passivation layer PAS2 can be disposed on the first pixel connection electrode PCE1 and the common voltage line VSL. The second passivation layer PAS2 can include the same material as the first passivation layer PAS1 described above.

[0301] The second planarization layer VA2 can be disposed on the second passivation layer PAS2. The second planarization layer VA2 can include the same material as the first planarization layer VA1 described above.

[0302] The light-emitting element layer EMTL including the sixth pattern layer may be disposed on the second planarization layer VA2. Here, the light-emitting element layer EMTL may include a first pixel electrode PE1, a light-emitting layer OL, and a common electrode CE. As in the examples shown in Figure 9 and Figure 10 , the sixth pattern layer may include the first pixel electrode PE1 and the common connection electrode CCE.

[0303] The first pixel electrode PE1 may be connected to the first pixel connection electrode PCE1 through a tenth contact hole CT10 passing through the second planarization layer VA2 and the second passivation layer PAS2. In a top-emission structure in which light is emitted from the light-emitting layer OL toward the common electrode CE, the first pixel electrode PE1 may be formed as a single layer of molybdenum (Mo), titanium (Ti), copper (Cu), or aluminum (Al), or in order to improve reflectivity, the first pixel electrode PE1 may be formed as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and indium tin oxide (ITO / Al / ITO), an APC alloy, or a stacked structure of an APC alloy and indium tin oxide (ITO / APC / ITO). The APC alloy may be an alloy of silver (Ag), palladium (Pd), and copper (Cu).

[0304] The common connection electrode CCE may be connected to the common voltage line VSL through a fourteenth contact hole CT14 passing through the second planarization layer VA2 and the second passivation layer PAS2. The common connection electrode CCE may include the same material as that of the first pixel electrode PE1 described above. According to an embodiment, as in the example shown in Figure 7 , the common connection electrode CCE may extend in the second direction DR2. For example, the common connection electrode CCE may intersect the common voltage line VSL extending in the first direction DR1.

[0305] The pixel defining layer PDL may be disposed on the sixth pattern layer. For example, as shown in Figure 10 , the pixel defining layer PDL may be disposed on the first pixel electrode PE1 and the common connection electrode CCE. The pixel defining layer PDL may have an opening defining a first light-emitting region EA1 and an opening defining a drilling region DRA.

[0306] The above-described light-emitting layer OL may be disposed on the pixel defining layer PDL. As described above, the light-emitting layer OL may have a tandem structure that provides, for example, blue light. According to an embodiment, the light-emitting layer OL may have a drilling DRH disposed in the drilling region DRA of the pixel defining layer PDL. The drilling DRH may pass through the light-emitting layer OL in the third direction DR3. The drilling DRH may be formed using, for example, a laser drilling method.

[0307] The common electrode CE can be disposed on the light-emitting layer OL. The common electrode CE can be connected to the common connection electrode CCE through a drilling hole DRH passing through the light-emitting layer OL. Accordingly, the common electrode CE can be connected to the common voltage line VSL through the common connection electrode CCE. The common electrode CE can receive the common voltage ELVSS from the common voltage line VSL.

[0308] The above-mentioned first cover layer CPL1 can be disposed on the common electrode CE.

[0309] The above-mentioned thin-film encapsulation layer TFE can be disposed on the first cover layer CPL1. The thin-film encapsulation layer TFE can include a lower inorganic layer TFEa, an organic layer TFEb, and an upper inorganic layer TFEc that are sequentially stacked on the first cover layer CPL1.

[0310] The second pixel connection electrode PCE2 included in the second pixel PX2 can be connected to the source connection electrode included in the second pixel PX2 through a contact hole passing through the first planarization layer VA1 and the first passivation layer PAS1. The third pixel connection electrode PCE3 included in the third pixel PX3 can be connected to the source connection electrode included in the third pixel PX3 through a contact hole passing through the first planarization layer VA1 and the first passivation layer PAS1.

[0311] The second pixel electrode PE2 included in the second pixel PX2 can be connected to the second pixel connection electrode PCE2 through a contact hole passing through the second planarization layer VA2 and the second passivation layer PAS2. The third pixel electrode PE3 included in the third pixel PX3 can be connected to the third pixel connection electrode PCE3 through a contact hole passing through the second planarization layer VA2 and the second passivation layer PAS2.

[0312] In the display device according to the present disclosure, the color fringing phenomenon is minimized, thereby improving the image quality.

[0313] Those of ordinary skill in the art to which the present disclosure pertains will understand that the present disclosure can be implemented in other forms without changing the technical spirit or essential features of the present disclosure. Therefore, it should be understood that the above embodiments are illustrative rather than restrictive. It should be understood that the scope of the present disclosure is defined by the claims, and all modifications and variations derived from the claims and their equivalents fall within the scope of the present disclosure.

Claims

1. A display device, comprising: A pixel electrode disposed on a substrate; A light-emitting layer disposed on the pixel electrode; A common electrode disposed on the light-emitting layer; And A color filter portion disposed on the common electrode, Wherein, the color filter portion of the first unit pixel includes: A first color filter having a fan shape; A second color filter having a fan shape; and A third color filter having a fan shape, The first unit pixel includes a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region, and The centers of the arcs of the first color filter, the centers of the arcs of the second color filter, and the centers of the arcs of the third color filter are disposed in different pixel regions.

2. The display device according to claim 1, wherein, The centers of the arcs of the first color filter, the centers of the arcs of the second color filter, and the centers of the arcs of the third color filter are respectively disposed in any three of the first pixel region, the second pixel region, the third pixel region, and the fourth pixel region.

3. The display device according to claim 2, wherein, The centers of the arcs of the first color filter, the centers of the arcs of the second color filter, and the centers of the arcs of the third color filter are not disposed in any one of the first pixel region, the second pixel region, the third pixel region, and the fourth pixel region.

4. The display device according to claim 1, wherein A second unit pixel adjacent to the first unit pixel in one direction includes a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region, The color filter portion disposed in the second unit pixel includes a first color filter, a second color filter, and a third color filter having a fan shape, and In a plan view, the color filter portion of the second unit pixel has a shape different from that of the color filter portion of the first unit pixel.

5. The display device according to claim 4, wherein, The color filter portion of the second unit pixel has a shape that can be rotated at a selectable angle with respect to the color filter portion of the first unit pixel.

6. The display device according to claim 5, wherein, The color filter portion of the second unit pixel has a shape that is rotated 90 degrees or 180 degrees clockwise or counterclockwise with respect to the color filter portion of the first unit pixel.

7. The display device according to claim 4, wherein, The positions of the first color filter, the second color filter, and the third color filter included in the color filter portion of the second unit pixel are different from the positions of the first color filter, the second color filter, and the third color filter included in the color filter portion of the first unit pixel.

8. The display device according to claim 7, wherein, The first color filter of the second unit pixel has a shape that can be rotated at a selectable angle with respect to the first color filter of the first unit pixel.

9. The display device according to claim 8, wherein, The first color filter of the second unit pixel has a shape that is rotated 90 degrees or 180 degrees clockwise or counterclockwise with respect to the first color filter of the first unit pixel.

10. The display device according to claim 4, wherein, The center of the arc of the first color filter disposed in the first unit pixel and the center of the arc of the first color filter disposed in the second unit pixel are disposed in different pixel regions.

11. The display device according to claim 10, wherein, In a case where an imaginary line connecting the center of the arc of the first color filter provided in the first unit pixel and the center of the first color filter provided in the first unit pixel is defined as a first center line and an imaginary line connecting the center of the arc of the first color filter provided in the second unit pixel and the center of the first color filter provided in the second unit pixel is defined as a second center line, an angle between the imaginary line extending along the first center line and the imaginary line extending along the second center line is 90 degrees or 180 degrees.

12. The display device according to claim 4, wherein a third unit pixel adjacent to the first unit pixel in another direction intersecting the one direction includes a first pixel region, a second pixel region, a third pixel region, and a fourth pixel region, a color filter portion provided in the third unit pixel includes a first color filter, a second color filter, and a third color filter having a fan shape, and in the plan view, the color filter portion of the third unit pixel has the same shape as the color filter portion of the first unit pixel.

13. The display device according to claim 1, further comprising: a pixel defining layer provided on the pixel electrode and defining a drilling area and a light emitting area overlapping the pixel electrode.

14. The display device according to claim 13, further comprising: a common voltage line provided on the substrate; and a common connection electrode provided on the common voltage line and electrically connected to the common voltage line through a contact hole of an insulating layer in the drilling area.

15. The display device according to claim 14, wherein, The light emitting layer has a drilling passing through the light emitting layer in the drilling area.

16. The display device according to claim 15, wherein, The common electrode is electrically connected to the common connection electrode through the drilling of the light emitting layer.

17. The display device according to claim 15, wherein, The drilling is provided in an intersection area of the common voltage line and the common connection electrode.

18. The display device according to any one of claims 1 to 17, wherein, The pixel electrode of the first unit pixel includes: a first pixel electrode corresponding to the first color filter and having a fan shape; a second pixel electrode corresponding to the second color filter and having a fan shape; and a third pixel electrode corresponding to the third color filter and having a fan shape.

Images