Display device and manufacturing method thereof

Abstract

Disclosed are a display device and a method of manufacturing the same, the display device including: a substrate including a sub-pixel; a first pixel electrode of the sub-pixel disposed on the substrate; a pixel defining layer disposed on the first pixel electrode, the pixel defining layer defining a first opening exposing the first pixel electrode; a spacer disposed on a top surface of the pixel defining layer; an organic light emitting portion disposed on the pixel defining layer and the separator, the organic light emitting portion including a plurality of light generating layers; and a second pixel electrode disposed on the organic light emitting portion. The spacer includes: a first layer disposed on the pixel defining layer; and a second layer disposed on the first layer, the second layer defining a second opening exposing the first layer.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2023-0078506, filed on Jun. 19, 2023, which is hereby incorporated by reference in its entirety. Technical Field

[0002] The disclosure generally relates to a display device and a method of manufacturing the display device. Background Art

[0003] Organic light emitting diodes ("OLEDs") are active light emitting display elements, and have advantages not only of having a wide viewing angle and excellent contrast, but also of being able to be driven at a low voltage, being lightweight and thin, and having a high response speed. Therefore, OLEDs have come into focus as next generation display elements.

[0004] One pixel may have a structure in which a plurality of light emitting layers are stacked. The plurality of light emitting layers may be commonly disposed in a sub-pixel in a pixel, and may be continuously disposed in a sub-pixel in a pixel. Summary of the invention

[0005] Since a plurality of organic light emitting parts are commonly disposed in a sub-pixel in a pixel, a lateral leakage phenomenon occurs between adjacent sub-pixels, and thus, the brightness or color purity of the display device may be deteriorated.

[0006] The embodiment provides a display device including a spacer disposed between adjacent sub-pixels to reduce or prevent a lateral leakage phenomenon.

[0007] The embodiment provides a method of manufacturing a display device including a spacer.

[0008] In a disclosed embodiment, a display device includes: a substrate including sub-pixels; a first pixel electrode of the sub-pixel, disposed on the substrate; a pixel defining layer, disposed above the first pixel electrode, the pixel defining layer defining a first opening exposing the first pixel electrode; a partition, disposed on a top surface of the pixel defining layer; an organic light-emitting portion, disposed on the pixel defining layer and the partition, the organic light-emitting portion including a plurality of light-generating layers; and a second pixel electrode, disposed on the organic light-emitting portion, wherein the partition includes: a first layer, disposed on the pixel defining layer; and a second layer, disposed on the first layer, the second layer defining a second opening exposing the first layer.

[0009] In an embodiment, the first layer may include a metallic material, and the second layer may include an inorganic material.

[0010] In an embodiment, at least a portion of the second pixel electrode may be disposed in the second opening.

[0011] In an embodiment, the second pixel electrode may be disposed directly on the first layer exposed by the second opening.

[0012] In an embodiment, the organic light emitting portion may include a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, a charge generation layer, and an electron injection layer sequentially arranged in a third direction intersecting the first direction. At least one of the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the charge generation layer, and the electron injection layer may not be arranged on the first layer exposed by the second opening.

[0013] In an embodiment, the hole injection layer and the charge generation layer may not be disposed on the first layer exposed by the second opening.

[0014] In an embodiment, the display device may further include: a reflective electrode of the sub-pixel, disposed between the substrate and the first pixel electrode.

[0015] In an embodiment, the display device may further include: an inorganic layer disposed on a substrate. The substrate may include a silicon substrate. The reflective electrode may be directly disposed on the substrate.

[0016] In an embodiment, a height of the second layer in the third direction may be about 400 nanometers (nm).The second opening may have a width of about 135 nm or less.

[0017] In an embodiment, the display device may further include: an encapsulation layer disposed on the second pixel electrode; and a color filter layer including first to third color filters, the first to third color filters being disposed on the encapsulation layer while being spaced apart from each other in the first direction.

[0018] In a disclosed embodiment, a display device includes: a substrate including sub-pixels; a first pixel electrode of the sub-pixel, disposed on the substrate; a pixel defining layer, disposed on the first pixel electrode, the pixel defining layer defining a first opening exposing the first pixel electrode; a partition, disposed on a top surface of the pixel defining layer; an organic light-emitting portion, disposed on the pixel defining layer and the partition, the organic light-emitting portion including a plurality of light-generating layers; and a second pixel electrode, disposed on the organic light-emitting portion, wherein the partition includes: a first pattern and a second pattern, disposed on the pixel defining layer and spaced apart from each other in a first direction; and a first film, covering the first pattern and the second pattern.

[0019] In an embodiment, the first and second patterns may include a metallic material, and the first film may include an inorganic material.

[0020] In an embodiment, a recess may be defined between the first pattern and the second pattern. At least a portion of the second pixel electrode may be disposed in the recess.

[0021] In an embodiment, a height of the recess in a third direction intersecting the first direction may be about 400 nm, and a width of the recess in the first direction may be about 135 nm.

[0022] In an embodiment, the first film may include: a first portion covering the first pattern; a second portion covering the second pattern; and a third portion covering the pixel defining layer exposed between the first pattern and the second pattern.

[0023] In an embodiment, the organic light emitting portion may include a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, a charge generation layer, and an electron injection layer sequentially arranged in a third direction intersecting the first direction. At least one of the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the charge generation layer, and the electron injection layer may not be arranged on the third portion of the first film.

[0024] In an embodiment, the hole injection layer and the charge generation layer may not be disposed on the third portion of the first film.

[0025] In an embodiment, the second pixel electrode may be disposed directly on the third portion of the first film.

[0026] In a disclosed embodiment, a method for manufacturing a display device includes: forming a first pixel electrode of a sub-pixel on a substrate; forming a pixel defining layer, the pixel defining layer defining a first opening exposing the first pixel electrode; forming a first layer on a top surface of the pixel defining layer; forming a second layer on the first layer, the second layer defining a second opening exposing the first layer; forming an organic light-emitting portion disposed on the first layer and the second layer, the organic light-emitting portion including a plurality of light-generating layers; and forming a second pixel electrode on the organic light-emitting portion, wherein a height of the second layer is proportional to a height of the organic light-emitting portion.

[0027] In an embodiment, forming the second layer defining the second opening may include: forming an inorganic layer on the first layer; and defining the second opening by etching and removing a portion of the inorganic layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features of embodiments of the invention will become more apparent by describing embodiments of the invention in more detail with reference to the accompanying drawings.

[0029] Figure 1 is a schematic plan view showing an embodiment of a display device according to the disclosure.

[0030] FIG. 2A to FIG. 2C It is shown Figure 1 A plan view of an embodiment of a pixel is shown in FIG.

[0031] Figure 3 It is shown that the FIG. 2A to FIG. 2CCircuit diagram of an embodiment of a sub-pixel in a pixel shown in .

[0032] Figure 4 It is shown Figure 3 sectional view of an embodiment of a light emitting element shown in FIG.

[0033] Figure 5 It is shown Figure 3 A cross-sectional view of another embodiment of a light emitting element is shown in FIG.

[0034] Figure 6 It is shown that Figure 3 A cross-sectional view of a stacked structure of a pixel of a light-emitting element shown in FIG.

[0035] Figure 7 It is shown Figure 6 0047] A cross-sectional view of an embodiment of a pixel is shown in FIG.

[0036] Figure 8 It is shown Figure 7 An enlarged view of an embodiment of region A is shown in FIG.

[0037] Fig. 9 It shows that the setting Figure 8 FIG. 1 is a cross-sectional view of some components of the organic light-emitting portion on the first layer and the second layer shown in FIG.

[0038] Fig.10 It is shown Figure 6 0047] A cross-sectional view of an embodiment of a pixel is shown in FIG.

[0039] Fig.11 It is shown Fig.10 An enlarged view of an embodiment of region B is shown in FIG.

[0040] Figures 12 to 17 is a schematic cross-sectional view illustrating an embodiment of a method of manufacturing a display device according to the disclosure.

[0041] Fig.18 and Fig.19 Shown including Figure 1 An embodiment of an electronic device of a display device shown in FIG. DETAILED DESCRIPTION

[0042] The disclosed embodiments will now be described more fully below with reference to the accompanying drawings in which various embodiments are shown. However, the present invention may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Instead, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art.

[0043] The same reference numerals always represent the same elements. In the accompanying drawings, for clarity, the thickness of certain lines, layers, components, elements or features may be exaggerated. It will be understood that although the terms "first", "second", etc. may be used here to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, without departing from the teachings of the invention, the "first" element discussed below may also be referred to as the "second" element.

[0044] The terms used herein are only used for the purpose of describing specific embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, "one (kind / person)", "the (described)" and "at least one (kind / person)" do not represent the limitation of quantity, and are intended to include both the singular and the plural. For example, unless the context clearly indicates otherwise, "element" has the same meaning as "at least one element". "At least one (kind / person)" should not be interpreted as being limited to "one (kind / person)". "Or" means "and / or". As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items.

[0045] It will also be understood that when the terms “comprises,” “includes,” and / or variations thereof are used in this specification, it indicates the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence and / or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0046] Throughout the specification, when an element is referred to as being “connected” or “coupled” to another element, the element may be directly connected or coupled to the other element, or indirectly connected or coupled to the other element with one or more intervening elements interposed therebetween.

[0047] In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used here to describe the relationship of one element to another element as shown in the drawings. It will be understood that, in addition to the orientation depicted in the drawings, relative terms are intended to include different orientations of the device. For example, if the device in one of the drawings is flipped, the element described as being on the "lower" side of the other elements will then be oriented to be on the "upper" side of the other elements. Therefore, depending on the specific orientation of the drawings, the term "lower" may include both "lower" and "upper" orientations. Similarly, if the device in one of the drawings is flipped, the element described as being "below" or "below" the other elements will then be oriented to be "above" the other elements. Therefore, the term "below..." or "under..." may include both upper and lower orientations.

[0048] As used herein, "about" or "approximately" is inclusive of the stated value and means within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art, taking into account the measurement being discussed and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, a term such as "about" may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0049] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It will also be understood that terms (such as those defined in general dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the disclosed context, and will not be interpreted in an idealized or overly formal sense unless explicitly so defined herein.

[0050] Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0051] Figure 1 is a schematic plan view showing an embodiment of a display device according to the disclosure. FIG. 2A to FIG. 2C It is shown Figure 1 A plan view of an embodiment of a pixel is shown in FIG.

[0052] Reference Figure 1 The display device DD is a device that displays moving images or still images, and can be used as a display screen not only for portable electronic devices such as mobile phones, smart phones, tablet personal computers ("PCs"), mobile communication terminals, electronic notebooks, electronic books, portable multimedia players ("PMPs"), navigation systems, and ultra-mobile PCs, but also for various products such as televisions, notebook computers, monitors, billboards, and Internet of Things ("IoT") devices.

[0053] The display device DD may be formed as a quadrilateral plane (e.g., a rectangular plane having long sides in a first direction DR1 and short sides in a second direction DR2 intersecting the first direction DR1). The corners where the long sides in the first direction DR1 and the short sides in the second direction DR2 meet each other may be formed as a circle to have a predetermined curvature, or may be formed as a right angle. The planar shape of the display device DD is not limited to a quadrilateral shape, and the display device DD may be formed as other polygonal shapes, a circular shape, or an elliptical shape. The display device DD may be formed to be flat, but the disclosure is not limited thereto. In an embodiment, for example, the display device DD may include a curved portion formed at the left end / right end and having a constant curvature or a varying curvature. In addition, the display device DD may be formed to be flexible enough to be warped, bendable, bendable, foldable, or rollable.

[0054] The display device DD may further include pixels PX for displaying an image, scan lines extending in a first direction DR1, and data lines extending in a second direction DR2. The pixels PX may be arranged in a matrix form in the first direction DR1 and the second direction DR2.

[0055] Reference Figure 1 and FIG. 2A to FIG. 2C , each of the pixels PX may include a plurality of sub-pixels SPX1, SPX2, and SPX3. FIG. 2A to FIG. 2C In the embodiment, it is illustrated that each of the pixels PX includes three sub-pixels SPX1, SPX2, and SPX3 (ie, a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3). However, the disclosed embodiments are not limited thereto. FIG. 2A to FIG. 2C In the embodiment of the present invention, it is exemplified that each of the pixels PX includes a first sub-pixel SPX1, a second sub-pixel SPX2, and a third sub-pixel SPX3. However, the disclosed embodiments are not limited thereto.

[0056] The first sub-pixel SPX1 , the second sub-pixel SPX2 , and the third sub-pixel SPX3 may be connected to any one of the data lines and at least one of the scan lines.

[0057] Reference Figure 2A, each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may have a plane shape of a quadrilateral (e.g., a rectangle, a square, or a rhombus). In an embodiment, for example, each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may have a rectangular plane shape having a short side in the first direction DR1 and a long side in the second direction DR2. In an optional embodiment, each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may have a square or rhombus plane shape including sides having the same length in the first direction DR1 and the second direction DR2. The first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may be arranged in the first direction DR1. In an embodiment, the areas of the first sub-pixel SPX1 to the third sub-pixel SPX3 may be substantially the same, but the disclosure is not limited thereto. In an embodiment, for example, the area of ​​at least one of the first sub-pixel SPX1 to the third sub-pixel SPX3 may be different from the area of ​​another of the first sub-pixel SPX1 to the third sub-pixel SPX3. In an alternative embodiment, any two of the areas of the first subpixel SPX1, the second subpixel SPX2, and the third subpixel SPX3 may be substantially the same, and the other of the areas of the first subpixel SPX1, the second subpixel SPX2, and the third subpixel SPX3 may be different from the two of the areas of the first subpixel SPX1, the second subpixel SPX2, and the third subpixel SPX3. In an alternative embodiment, the areas of the first subpixel SPX1, the second subpixel SPX2, and the third subpixel SPX3 may be different from each other.

[0058] Reference Figure 2B , the first sub-pixel SPX1 may be arranged with any one of the second sub-pixel SPX2 and the third sub-pixel SPX3 in the first direction DR1, and arranged with the other of the second sub-pixel SPX2 and the third sub-pixel SPX3 in the second direction DR2. In an embodiment, for example, the first sub-pixel SPX1 may be arranged side by side with the second sub-pixel SPX2 in the first direction DR1, and arranged with the third sub-pixel SPX3 in the second direction DR2. In an embodiment, the third sub-pixel SPX3 may be arranged with the first sub-pixel SPX1 and the second sub-pixel SPX2 in the second direction DR2. In an embodiment, the areas of the first sub-pixel SPX1 and the second sub-pixel SPX2 may be substantially the same, and the area of ​​the third sub-pixel SPX3 may be different from the areas of the first sub-pixel SPX1 and the second sub-pixel SPX2. In an embodiment, for example, the area of ​​the third sub-pixel SPX3 may be wider than the areas of the first sub-pixel SPX1 and the second sub-pixel SPX2.

[0059] Reference Figure 2C , each of the first subpixel SPX1, the second subpixel SPX2, and the third subpixel SPX3 may have a hexagonal or regular hexagonal plane shape. In an embodiment, adjacent two surfaces of the six surfaces of each of the first to third subpixels SPX1 to SPX3 may face one surface of an adjacent subpixel.

[0060] The first sub-pixel SPX1 may emit a first light, the second sub-pixel SPX2 may emit a second light, and the third sub-pixel SPX3 may emit a third light. The first light may be light in a red band, the second light may be light in a green band, and the third light may be light in a blue band. The red band may be a band of about 600 nanometers (nm) to about 750 nm, the green band may be a band of about 480 nm to about 560 nm, and the blue band may be a band of about 370 nm to about 460 nm. However, the disclosed embodiments are not limited thereto.

[0061] Each of the first sub-pixel SPX1, the second sub-pixel SPX2, and the third sub-pixel SPX3 may include a light emitting element LD (eg, Figure 4 and Figure 5 The light emitting element LD shown in FIG. 1 ) may include an organic light emitting element having an organic layer.

[0062] The area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3 may be substantially the same, but the disclosed embodiments are not limited thereto. At least one of the area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3 may be different from the other of the area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3. In an alternative embodiment, any two of the area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3 may be substantially the same, and the other of the area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3 may be different from the two of the area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3. In an alternative embodiment, the area of ​​the first sub-pixel SPX1, the area of ​​the second sub-pixel SPX2, and the area of ​​the third sub-pixel SPX3 may be different from each other.

[0063] Figure 3 It is shown that the FIG. 2A to FIG. 2C Circuit diagram of an embodiment of a sub-pixel in a pixel shown in .

[0064] Figure 3 The sub-pixel SPX shown in FIG. 1 may be FIG. 2A to FIG. 2CAny one of the sub-pixels SPX1 to SPX3 shown in FIG. 1 and the sub-pixels SPX1 to SPX3 arranged in the display area of ​​each display device DD may be configured to be substantially the same as or similar to each other.

[0065] For ease of description, we will Figure 3 , a sub-pixel SPX (i and j are positive integers) arranged on the j-th pixel column in the i-th pixel row (or the i-th horizontal line) is shown.

[0066] Reference Figure 3 The sub-pixel SPX may include a light emitting unit EMU that generates light having brightness corresponding to the data signal. In addition, the sub-pixel SPX may further include a pixel circuit PXC for driving the light emitting unit EMU.

[0067] The light emitting unit EMU may include a light emitting element LD connected between a first power line PL1 supplied with a voltage of a first driving power source VDD (or a first power source) and a second power line PL2 supplied with a voltage of a second driving power source VSS (or a second power source). In an embodiment, the light emitting unit EMU may include a light emitting element LD, the light emitting element LD including a first pixel electrode AE ​​connected to the first driving power source VDD via a pixel circuit PXC and a first power line PL1 and a second pixel electrode CE connected to the second driving power source VSS via a second power line PL2. The first pixel electrode AE ​​may be an anode, and the second pixel electrode CE may be a cathode. The first driving power source VDD and the second driving power source VSS may have different potentials. During the emission period of the sub-pixel SPX, the potential difference between the first driving power source VDD and the second driving power source VSS may be set to be equal to or higher than the threshold voltage of the light emitting element LD.

[0068] When the subpixel SPX is arranged in the i-th pixel row and j-th pixel column in the display area of ​​the display device DD, the pixel circuit PXC of the subpixel SPX can be electrically connected to the i-th scan line Si and the j-th data line Dj. In addition, the pixel circuit PXC can be electrically connected to the i-th control line CLi and the j-th sensing line SENj.

[0069] The above-mentioned pixel circuit PXC may include first to third transistors T1 , T2 , and T3 and a storage capacitor Cst.

[0070] The first transistor T1 is a driving transistor for controlling the driving current applied to the light emitting element LD, and can be electrically connected between the first driving power supply VDD and the light emitting element LD. Specifically, the first terminal of the first transistor T1 can be electrically connected to the first driving power supply VDD through the first power line PL1, the second terminal of the first transistor T1 can be electrically connected to the second node N2, and the gate electrode of the first transistor T1 can be electrically connected to the first node N1. The first transistor T1 can control the amount of driving current applied to the light emitting element LD from the first driving power supply VDD through the second node N2 according to the voltage applied to the first node N1. In an embodiment, the first terminal of the first transistor T1 can be a drain electrode, and the second terminal of the first transistor T1 can be a source electrode. However, the disclosure is not limited thereto. In some embodiments, the first terminal can be a source electrode, and the second terminal can be a drain electrode.

[0071] The second transistor T2 is a switching transistor that selects the sub-pixel SPX in response to the scan signal and activates the sub-pixel SPX, and can be electrically connected between the data line (e.g., the j-th data line) Dj and the first node N1. The first terminal of the second transistor T2 can be electrically connected to the data line Dj, the second terminal of the second transistor T2 can be electrically connected to the first node N1 (or the gate electrode of the first transistor T1), and the gate electrode of the second transistor T2 can be electrically connected to the scan line (or the i-th scan line) Si. The first terminal and the second terminal of the second transistor T2 are different terminals from each other. In an embodiment, for example, when the first terminal is a drain electrode, the second terminal can be a source electrode.

[0072] The second transistor T2 may be turned on when a scan signal having a gate-on voltage (e.g., a relatively high level voltage) is supplied from the scan line Si to electrically connect the data line Dj and the first node N1 to each other. The first node N1 is a point at which the second terminal of the second transistor T2 and the gate electrode of the first transistor T1 are connected to each other, and the second transistor T2 may transmit a data signal to the gate electrode of the first transistor T1.

[0073] The third transistor T3 can electrically connect the first transistor T1 to a sensing line (e.g., the jth sensing line) SENj to obtain a sensing signal through the sensing line SENj, and detect the characteristics of the sub-pixel SPX (including the threshold voltage of the first transistor T1, etc.) through the sensing signal. The information about the characteristics of the sub-pixel SPX can be used to convert the image data so that the characteristic deviation between the sub-pixels SPX can be compensated. The second terminal of the third transistor T3 can be electrically connected to the second terminal of the first transistor T1, the first terminal of the third transistor T3 can be electrically connected to the sensing line SENj, and the gate electrode of the third transistor T3 can be electrically connected to the control line (e.g., the i-th control line) CLi. The first terminal can be a drain electrode, and the second terminal can be a source electrode.

[0074] The third transistor T3 is an initialization transistor capable of initializing the second node N2 and may be turned on when supplied with a sensing control signal from the control line CLi to transmit a voltage of an initialization power source to the second node N2. Thus, the storage capacitor Cst electrically connected to the second node N2 may be initialized.

[0075] The storage capacitor Cst may include a lower electrode LE (or a first storage electrode) and an upper electrode UE (or a second storage electrode). The lower electrode LE may be electrically connected to the first node N1, and the upper electrode UE may be electrically connected to the second node N2. The storage capacitor Cst is charged with a data voltage corresponding to a data signal supplied to the first node N1 during one frame period. Therefore, the storage capacitor Cst may store a voltage corresponding to a difference between a voltage of the gate electrode of the first transistor T1 and a voltage of the second node N2.

[0076] Despite Figure 3 The embodiment in which the first transistor T1 to the third transistor T3 are all N-type transistors has been disclosed, but the disclosure is not limited thereto. In the embodiment, for example, at least one of the first transistor T1 to the third transistor T3 can be replaced with a P-type transistor. The structure of the pixel circuit PXC can be variously modified and implemented.

[0077] Figure 4 It is shown Figure 3 sectional view of an embodiment of a light emitting element shown in FIG.

[0078] Reference Figure 4 , the light emitting element LD may include a first pixel electrode AE, an organic light emitting portion EL, and a second pixel electrode CE which are sequentially stacked.

[0079] In an embodiment, the first pixel electrode AE ​​may be patterned to correspond to the first to third subpixels SPX1 to SPX3. In an embodiment, the first pixel electrode AE ​​may include first to third subpixel electrodes AE1 to AE3 corresponding to the first to third subpixels SPX1 to SPX3, respectively. The first subpixel electrode AE1 may be a pixel electrode corresponding to the first subpixel SPX1, the second subpixel electrode AE2 may be a pixel electrode corresponding to the second subpixel SPX2, and the third subpixel electrode AE3 may be a pixel electrode corresponding to the third subpixel SPX3.

[0080] In an embodiment, the organic light emitting portion EL may be disposed on the first to third sub-pixel electrodes AE1 to AE3, and the first to third sub-pixel electrodes AE1 to AE3 are patterned to correspond to the first to third sub-pixels SPX1 to SPX3, respectively. The organic light emitting portion EL may include a plurality of light generating layers, and at least some of the plurality of light generating layers constituting the organic light emitting portion EL may be integrated with the first to third sub-pixels SPX1 to SPX3 or separated from the first to third sub-pixels SPX1 to SPX3. In an embodiment, the organic light emitting portion EL may include a partition (e.g., Figure 7 The separator SPT shown in Fig.10 The plurality of light generating layers are interrupted by a spacer SPT′) shown in FIG.

[0081] The organic light emitting portion EL may have a multi-layer thin film structure including a plurality of light generating layers. The organic light emitting portion EL may include a hole injection layer HIL, a hole transport layer HTL, an organic light emitting layer EML, an electron transport layer ETL, and an electron injection layer EIL stacked sequentially.

[0082] The hole injection layer HIL may be an organic layer disposed between the first pixel electrode AE ​​and the hole transport layer HTL to allow holes to be smoothly injected from the first pixel electrode AE ​​into the organic light emitting layer EML. The hole transport layer HTL may be disposed between the hole injection layer HIL and the organic light emitting layer EML to perform a function of receiving holes provided from the first to third sub-pixel electrodes AE1 to AE3 and transporting the holes to the organic light emitting layer EML.

[0083] The electron injection layer EIL may be disposed between the electron transport layer ETL and the second pixel electrode CE. The electron transport layer ETL may be disposed on the organic light emitting layer EML to perform a function of receiving electrons provided from the second pixel electrode CE and transferring the electrons to the organic light emitting layer EML.

[0084] The organic light emitting layer EML is a region in which light is generated by the recombination of electrons and holes supplied from the first pixel electrode AE ​​and the second pixel electrode CE. The organic light emitting layer EML may include an organic light emitting material (such as a relatively high molecular organic material or a relatively low molecular organic material) that emits light of a predetermined color. In an embodiment, for example, the organic light emitting layer EML may be provided with an organic material that emits blue light. However, the disclosure is not limited thereto. In an embodiment, the organic light emitting layer EML may be provided with an organic material that emits red light or green light, or with an inorganic material or a quantum dot.

[0085] In an embodiment, the second pixel electrode CE may be integrally provided. The second pixel electrode CE may be provided on the organic light emitting portion EL. The second pixel electrode CE may be integrally provided in the light emitting element.

[0086] Figure 5 It is shown Figure 3 A cross-sectional view of another embodiment of a light emitting element is shown in FIG.

[0087] Reference Figure 5 , the light emitting element LD may include a first pixel electrode AE, an organic light emitting portion EL and a second pixel electrode CE.

[0088] The organic light emitting part EL may include a plurality of light generating layers. In an embodiment, the organic light emitting part EL may include a first organic light emitting part ELa, a charge generating layer CGL, and a second organic light emitting part ELb. The first pixel electrode AE, the first organic light emitting part ELa, the charge generating layer CGL, the second organic light emitting part ELb, and the second pixel electrode CE may be sequentially stacked.

[0089] The first organic light-emitting portion ELa may be provided with a structure in which a hole injection layer HIL, a first hole transport layer HTLa, a first organic light-emitting layer EMLa, and a first electron transport layer ETLa are sequentially stacked. The second organic light-emitting portion ELb may be provided with a structure in which a second hole transport layer HTLb, a second organic light-emitting layer EMLb, a second electron transport layer ETLb, and an electron injection layer EIL are sequentially stacked.

[0090] In an embodiment, a buffer layer (not shown) may be disposed on the first organic light emitting layer EMLa and the second organic light emitting layer EMLb. The buffer layer may include an electron transport compound.

[0091] The charge generation layer CGL may perform a function of supplying charges to the first organic light emitting portion ELa and the second organic light emitting portion ELb. The charge generation layer CGL may include an n-type charge generation layer n-CGL for supplying charges to the first organic light emitting portion ELa and a p-type charge generation layer p-CGL for supplying holes to the second organic light emitting portion ELb. The n-type charge generation layer n-CGL may include a metal material as a dopant.

[0092] exist Figure 5 In the embodiment, it has been shown that the light emitting element LD is arranged so that the two organic light emitting parts ELa and ELb of the light emitting element LD are stacked. However, the disclosure is not limited to this. In the embodiment, for example, the light emitting element LD can be arranged so that three or four or more organic light emitting parts are stacked in the light emitting element LD.

[0093] Figure 6 It is shown that Figure 3A cross-sectional view of a stacked structure of a pixel of a light-emitting element shown in FIG.

[0094] Reference Figure 6 , the pixel PX may include a substrate SUB, a light emitting element LD, an encapsulation layer TFE, and a color filter layer CFL.

[0095] The substrate SUB may include a silicon substrate, but the disclosure is not limited thereto. In an embodiment, the substrate SUB may be, for example, a rigid substrate or a flexible substrate. The rigid substrate may be, for example, a glass substrate, a quartz substrate, a glass ceramic substrate, and a crystallized glass substrate. The light emitting element LD may be disposed on the substrate SUB. A pixel circuit layer (not shown) may be disposed between the substrate SUB and the light emitting element LD. The pixel circuit layer may include various driving elements or various lines for driving the light emitting element LD. In an embodiment, for example, the pixel circuit layer may be constructed with components such as transistors (e.g., Figure 3 ), a first transistor T1 to a third transistor T3 shown in FIG. 1 ), a storage capacitor (eg, Figure 3 ), various components of the scan lines and the data lines shown in FIG. 1 , but the disclosure is not limited thereto.

[0096] The light emitting element LD (or organic light emitting element layer) may be disposed on the substrate SUB. The light emitting element LD may include a first pixel electrode AE, an organic light emitting portion EL, and a second pixel electrode CE.

[0097] The first pixel electrode AE ​​may be patterned with respect to the first to third subpixels SPX1 to SPX3. Since the first pixel electrode AE ​​supplies holes to the organic light emitting portion EL, the first pixel electrode AE ​​may include or consist of a transparent conductive material having a relatively high work function.

[0098] The first pixel electrode AE ​​may include or be composed of a transparent conductive material such as tin oxide (“TO”), zinc oxide (ZnO), indium tin oxide (“ITO”), indium zinc oxide (“IZO”), or indium zinc tin oxide (“ITZO”), but the disclosure is not limited thereto.

[0099] The organic light emitting portion EL may be disposed between the first pixel electrode AE ​​and the second pixel electrode CE. The organic light emitting portion EL may be a region in which light is emitted by recombination of electrons and holes supplied from the first pixel electrode AE ​​and the second pixel electrode CE.

[0100] The organic light emitting portion EL may be a white light emitting layer from which white light is emitted. The white light emitted from the organic light emitting portion EL may be converted into any one of red, green and blue light by the color filter layer CFL. The design inside the organic light emitting portion EL may also be changed according to the color of the light to be achieved. In an embodiment, for example, when the corresponding pixel is a green pixel, the organic light emitting portion EL may include a green light emitting layer to emit green light. When the corresponding pixel is a red pixel, the organic light emitting portion EL may include a red light emitting layer to emit red light. When the corresponding pixel is a blue pixel, the organic light emitting portion EL may include a blue light emitting layer to emit blue light. The color filter layer may not be disposed above the light emitting element LD.

[0101] The second pixel electrode CE may be disposed on the organic light emitting portion EL. The second pixel electrode CE may be formed as a layer over the entire surface of the substrate SUB. The second pixel electrodes CE of the corresponding first to third sub-pixels SPX1 to SPX3 may be connected to each other to form a whole. Since the second pixel electrode CE supplies electrons to the organic light emitting portion EL, the second pixel electrode CE may include a conductive material having a relatively low work function. In an embodiment, for example, the second pixel electrode CE may include a transparent conductive material such as TO, zinc oxide (ZnO), ITO, IZO or ITZO or an ytterbium alloy or may be composed of a transparent conductive material such as TO, zinc oxide (ZnO), ITO, IZO or ITZO or an ytterbium alloy. In addition, the second pixel electrode CE may include a metal material such as silver (Ag), copper (Cu) or a magnesium-silver (Mg-Ag) alloy or a metal material having a relatively thin thickness or may be composed of a metal material such as silver (Ag), copper (Cu) or a magnesium-silver (Mg-Ag) alloy or a metal material having a relatively thin thickness, but the disclosure is not limited thereto.

[0102] The encapsulation layer TFE may be disposed on the second pixel electrode CE. The encapsulation layer TFE may block the penetration of moisture or oxygen introduced from the outside, thereby protecting the light emitting element LD. The encapsulation layer TFE may be a multilayer in which an inorganic layer and an organic layer are alternately disposed.

[0103] The color filter layer CFL may be disposed on the encapsulation layer TFE. The color filter layer CFL may include first to third color filters CF1 to CF3 to correspond to the first to third subpixels SPX1 to SPX3, respectively. The color filter layer CFL may convert white light emitted from the organic light emitting portion EL of the light emitting element LD into light of a predetermined color.

[0104] The first color filter CF1 may be disposed in a region corresponding to the first subpixel electrode AE1 of the first subpixel SPX1. The first color filter CF1 may allow light of a first color to be selectively transmitted therethrough. In an embodiment, for example, the first color filter CF1 may include a color filter material of a first color that allows light of a first color to be transmitted therethrough and blocks light of a second color and a third color.

[0105] The second color filter CF2 may be disposed in a region corresponding to the second subpixel electrode AE2 of the second subpixel SPX2. In an embodiment, for example, the second color filter CF2 may include a second color filter material that allows the second color light to be transmitted therethrough and blocks the first and third color lights.

[0106] The third color filter CF3 may be disposed in a region corresponding to the third subpixel electrode AE3 of the third subpixel SPX3. In an embodiment, for example, the third color filter CF3 may include a third color filter material that allows third color light to be transmitted therethrough and blocks first and second color light.

[0107] In an embodiment, when the first subpixel SPX1 is a red subpixel, the first color filter CF1 may include a red color filter. When the second subpixel SPX2 is a green subpixel, the second color filter CF2 may include a green color filter. When the third subpixel SPX3 is a blue subpixel, the third color filter CF3 may include a blue color filter.

[0108] Figure 7 It is shown Figure 6 0047] A cross-sectional view of an embodiment of a pixel is shown in FIG.

[0109] Reference Figure 7 , the pixel PX may include a substrate SUB, an inorganic layer IOL, reflective electrodes RE1 to RE3 , a first pixel electrode AE, an organic light emitting portion EL, a second pixel electrode CE, a pixel defining layer PDL, and a spacer SPT.

[0110] The reflective electrodes RE1 to RE3 may be disposed on the substrate SUB. The reflective electrodes RE1 to RE3 may include first to third reflective electrodes RE1 to RE3. The first to third reflective electrodes RE1 to RE3 may be disposed on the substrate SUB to be spaced apart from each other in the first direction DR1.

[0111] The first to third reflective electrodes RE1 to RE3 may be disposed under the first to third subpixel electrodes AE1 to AE3, respectively. The reflective electrodes RE1 to RE3 may be disposed under the first to third subpixel electrodes AE1 to AE3 to reflect the light emitted from the organic light emitting portion EL toward the second pixel electrode CE. The first to third reflective electrodes RE1 to RE3 may include a metal material having excellent reflectivity. In an embodiment, for example, the first to third reflective electrodes RE1 to RE3 may include a material such as aluminum (Al), titanium (Ti), silver (Ag), a silver alloy (Ag alloy), copper (Cu), or a magnesium-silver (Mg-Ag) alloy or may be composed of a material such as aluminum (Al), titanium (Ti), silver (Ag), a silver alloy (Ag alloy), copper (Cu), or a magnesium-silver (Mg-Ag) alloy, but the disclosure is not limited thereto.

[0112] The first reflective electrode RE1 may be disposed under the first subpixel electrode AE1 of the first subpixel SPX1. The second reflective electrode RE2 may be disposed under the second subpixel electrode AE2 of the second subpixel SPX2. The third reflective electrode RE3 may be disposed under the third subpixel electrode AE3 of the third subpixel SPX3.

[0113] exist Figure 7 , it is shown that the first to third reflective electrodes RE1 to RE3 are disposed on the same layer on the substrate SUB. However, the disclosure is not limited thereto. In an embodiment, the first to third reflective electrodes RE1 to RE3 may be disposed on different layers from each other. In an embodiment, for example, each of the first to third reflective electrodes RE1 to RE3 may be disposed at a position for realizing a microcavity effect. The distance between the organic light emitting parts EL1 to EL3 and the first to third reflective electrodes RE1 to RE3 is adjusted, thereby improving the light emitting efficiency of the first to third subpixels SPX1 to SPX3.

[0114] The inorganic layer IOL may be entirely disposed on the substrate SUB and the reflective electrodes RE1 to RE3. The inorganic layer IOL may be disposed between the substrate SUB and the light emitting element LD. The inorganic layer IOL may be used as a cavity control layer that amplifies light emitted from the organic light emitting portion EL and improves light emitting efficiency. The inorganic layer IOL may be disposed between the reflective electrodes RE1 to RE3 and the first to third sub-pixel electrodes AE1 to AE3 to form a structure for realizing a microcavity. Figure 7, the inorganic layer IOL is shown to have a uniform thickness on the substrate SUB. However, the disclosure is not limited thereto. In an embodiment, for example, the inorganic layer IOL may have different thicknesses relative to the first to third sub-pixels SPX1 to SPX3, so that each of the first to third sub-pixels SPX1 to SPX3 implements a microcavity corresponding to light emitted in the corresponding sub-pixel.

[0115] The first to third sub-pixel electrodes AE1 to AE3 may be disposed on the inorganic layer IOL. The first to third sub-pixel electrodes AE1 to AE3 may be spaced apart from each other in the first direction DR1. Each of the first to third sub-pixel electrodes AE1 to AE3 may be electrically connected to a pixel circuit layer (not shown) formed on the substrate SUB through a contact hole (not shown).

[0116] The pixel defining layer PDL may be disposed on the first to third sub-pixel electrodes AE1 to AE3 to define a position where the organic light emitting portion EL is arranged. The pixel defining layer PDL may separate the first to third sub-pixels SPX1 to SPX3. A first opening OP1 for exposing at least one region of the first to third sub-pixel electrodes AE1 to AE3 may be defined in the pixel defining layer PDL. The first opening OP1 may overlap an emission region of the corresponding first to third sub-pixels SPX1 to SPX3.

[0117] The first opening OP1 may include a 1_1th opening OP1_1, a 1_2th opening OP1_2, and a 1_3th opening OP1_3. The first subpixel electrode AE1 of the first subpixel SPX1 may be exposed through the 1_1th opening OP1_1. The second subpixel electrode AE2 of the second subpixel SPX2 may be exposed through the 1_2th opening OP1_2. The third subpixel electrode AE3 of the third subpixel SPX3 may be exposed through the 1_3th opening OP1_3. The organic light emitting portion EL may be disposed on the first pixel electrode AE ​​exposed through the first opening OP1.

[0118] The pixel defining layer PDL may include an inorganic material. In an embodiment, for example, the pixel defining layer PDL may include silicon oxide (SiO x ) and silicon nitride (SiN x ) In some embodiments, the pixel defining layer PDL may have a layer including silicon oxide (SiO x ) layer and a layer including silicon nitride (SiN x ) of the layer. However, the disclosure is not limited thereto. In other embodiments, the pixel defining layer PDL may include an organic material. In an embodiment, the pixel defining layer PDL may include at least one of an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, and a polyimide resin.

[0119] The spacer SPT may be disposed on the pixel defining layer PDL. The second opening OP2 may be defined in the spacer SPT. The second opening OP2 may be a step difference defined in the top surface of the spacer SPT. In the disclosure, the spacer SPT is a structure that physically separates a plurality of light generating layers of the light emitting element LD, and is referred to as the term "spacer" and other terms.

[0120] The second opening OP2 may separate the organic light emitting portion EL disposed on the pixel defining layer PDL into first to third light emitting portions EL1 to EL3 .

[0121] Will refer to Figure 8 The structure of the separator SPT is described in detail.

[0122] In an embodiment, the organic light emitting portion EL may be disposed on the first to third sub-pixel electrodes AE1 to AE3 exposed through the first opening OP1 of the pixel defining layer PDL.

[0123] In an embodiment, the organic light emitting portion EL may include a plurality of light generating layers. In an embodiment, the organic light emitting portion EL may be separated into a first light emitting portion EL1, a second light emitting portion EL2, and a third light emitting portion EL3 by a partition SPT. In another embodiment, some of the plurality of light generating layers constituting the organic light emitting portion EL may extend continuously from the first sub-pixel SPX1 to the third sub-pixel SPX3, but other light generating layers of the plurality of light generating layers may be separated by the partition SPT. In an embodiment, a hole injection layer (e.g., Figure 4 and Figure 5 The hole injection layer HIL) and / or the charge generation layer (eg, Figure 5 The charge generation layer CGL) shown in FIG. 1 may be partitioned by a partition SPT.

[0124] The organic light emitting portion EL may be disposed in a region surrounded by the partition SPT and may include a first light emitting portion EL1 forming a first subpixel SPX1, a second light emitting portion EL2 forming a second subpixel SPX2, and a third light emitting portion EL3 forming a third subpixel SPX3.

[0125] The spacer SPT may be disposed in a boundary region between adjacent light emitting parts EL1 to EL3 (or first to third subpixels SPX1 to SPX3 ).

[0126] In an embodiment, the second pixel electrode CE may be disposed on the organic light emitting portion EL. The second pixel electrode CE may be disposed (or formed) as a layer over the entire surface of the first to third light emitting portions EL1 to EL3. The second pixel electrode CE may be disposed according to the contours of the first to third light emitting portions EL1 to EL3 and the partition SPT. At least a portion of the second pixel electrode CE may be disposed in the second opening OP2 of the partition SPT. In an embodiment, when all the plurality of light generating layers constituting the organic light emitting portion EL are separated by the partition SPT, the second pixel electrode CE disposed on the second opening OP2 may contact at least a portion of the partition SPT.

[0127] In the display device of the disclosed embodiment, the organic light emitting portion EL commonly provided in the first sub-pixel SPX1 to the third sub-pixel SPX3 can be separated into the first light emitting portion EL1 to the third light emitting portion EL3 respectively corresponding to the sub-pixels by the separator SPT. Therefore, the lateral leakage phenomenon caused by the organic light emitting portion EL commonly provided in the first sub-pixel SPX1 to the third sub-pixel SPX3 between adjacent sub-pixels can be reduced or prevented, thereby preventing the brightness or color purity of the display device from being reduced.

[0128] Figure 8 It is shown Figure 7 An enlarged view of an embodiment of region A is shown in FIG.

[0129] Reference Figure 7 and Figure 8 , the spacer SPT may be disposed on the pixel defining layer PDL.

[0130] In an embodiment, the spacer SPT may include a first layer SPT1 and a second layer SPT2. In an embodiment, the first layer SPT1 may be disposed on a top surface of the pixel defining layer PDL. The second layer SPT2 may be disposed on the first layer SPT1. A second opening OP2 exposing an area of ​​the first layer SPT1 may be defined in the second layer SPT2. The second opening OP2 may penetrate the second layer SPT2 in a third direction DR3. The one area of ​​the first layer SPT1 may be exposed through the second opening OP2.

[0131] Reference Figure 7 and Figure 8 , a partition SPT may be provided between the first to third sub-pixels SPX1 to SPX3 to cut the organic light emitting portion EL in the third direction DR3 through a step difference formed by the second opening OP2. The partition SPT may physically separate the organic light emitting portion EL into the first to third light emitting portions EL1 to EL3, and the first to third light emitting portions EL1 to EL3 may be physically separated from each other, so that movement of charges / holes between the first to third light emitting portions EL1 to EL3 may be blocked.

[0132] In an embodiment, the spacer SPT may have a width SPT1_D. The width SPT1_D may be about 1000 nm.

[0133] In an embodiment, the height SPT2_H of the second layer SPT2 (or the depth or height of the second opening OP2) may have a height within a range for cutting the organic light emitting portion EL. In an embodiment, as the height of the organic light emitting portion EL becomes higher, the height SPT2_H of the second layer SPT2 may become higher. That is, the height SPT2_H of the second layer SPT2 may be proportional to the height of the organic light emitting portion EL.

[0134] In an embodiment, the width OP2_D of the second opening OP2 may be determined by considering the height of the organic light emitting portion EL and / or the thickness of the second pixel electrode CE. As the width OP2_D of the second opening OP2 becomes wider, the second pixel electrode CE is not cut and may be disposed on the second opening OP2. As the width OP2_D of the second opening OP2 becomes narrower, the second pixel electrode CE may be cut together with the organic light emitting portion EL. Therefore, the width OP2_D of the second opening OP2 may be determined within a range where the second pixel electrode CE is not cut when the organic light emitting portion EL is cut. In an embodiment, the width OP2_D of the second opening OP2 may be about 135 nm or less.

[0135] In an embodiment, the first layer SPT1 and the second layer SPT2 may include different materials from each other.

[0136] In an embodiment, the first layer SPT1 may include a metal material. In an embodiment, the first layer SPT1 may include at least one of various metal materials including silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), titanium (Ti), molybdenum (Mo), copper (Cu), etc., but the disclosure is not limited thereto. The first layer SPT1 may include at least one conductive material among alloys including the above metal materials, conductive oxides (such as ITO, IZO, ITZO, aluminum-doped zinc oxide ("AZO"), gallium-doped zinc oxide ("GZO"), zinc tin oxide ("ZTO"), or gallium tin oxide ("GTO")), and conductive polymers (such as poly (3,4-ethylenedioxythiophene) ("PEDOT")), but the disclosure is not necessarily limited thereto.

[0137] In an embodiment, the second layer SPT2 may include an inorganic material. The second layer SPT2 may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiO x Ny ), aluminum nitride (AlN x ), aluminum oxide (AlO x ), zirconium oxide (ZrO x ), hafnium oxide (HfO x ) and titanium oxide (TiO x ) at least one of.

[0138] In an embodiment, a plurality of light generating layers constituting the organic light emitting portion EL may be separated by a partition SPT. The plurality of light generating layers may include a hole injection layer (eg, Figure 4 and Figure 5 The hole injection layer HIL shown in FIG. 1 ), the hole transport layer (eg, Figure 4 The hole transport layer HTL shown in FIG. Figure 5 , the first hole transport layer HTLa and the second hole transport layer HTLb shown in FIG. 1 ), an organic light emitting layer (eg, Figure 4 The organic light emitting layer EML shown in Figure 5 , a first organic light-emitting layer EMLa and a second organic light-emitting layer EMLb), an electron transport layer (eg, Figure 4 The electron transport layer ETL shown in Figure 5 , a first electron transport layer ETLa and a second electron transport layer ETLb as shown in FIG. 1 ), a charge generating layer (eg, Figure 5 The charge generation layer CGL shown in FIG. 1 and the electron injection layer (eg, Figure 4 and Figure 5 In an embodiment, at least one of the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the charge generation layer, and the electron injection layer may be cut in the second opening OP2 by the partition SPT. The plurality of light generation layers cut by the partition SPT may not be disposed on the first layer SPT1 exposed by the second opening OP2. In an embodiment, for example, the hole injection layer (e.g., Figure 4 and Figure 5 The hole injection layer HIL) and / or the charge generation layer (eg, Figure 5 The charge generation layer CGL shown in FIG. 2 may be separated by the separator SPT. The hole injection layer and the charge generation layer may not be disposed on the first layer SPT1 exposed through the second opening OP2.

[0139] The display device in the disclosed embodiment may include first to third light emitting portions EL1 to EL3 separated from each other by a partition SPT relative to the second opening OP2. In addition, when the organic light emitting portion EL is cut relative to the second opening OP2, the second pixel electrode CE provided on the organic light emitting portion EL may be in direct contact with the first layer SPT1 on the first layer SPT1 exposed through the second opening OP2. Therefore, the driving voltage of the first to third sub-pixels SPX1 to SPX3 may be reduced.

[0140] Fig. 9 It shows that the setting Figure 8 FIG. 1 is a cross-sectional view of some components of the organic light-emitting portion on the first layer and the second layer shown in FIG.

[0141] Reference Fig. 9 , light emitting elements (e.g., Figure 5 The organic light emitting portion EL of the light emitting element LD shown in FIG. 1 may be disposed on the partition SPT.

[0142] The organic light emitting portion EL may include a plurality of light generating layers. In an embodiment, the plurality of light generating layers may include a hole injection layer HIL, a first hole transport layer HTLa, a first organic light emitting layer EMLa, a first buffer layer BFLa, a first electron transport layer ETLa, a charge generating layer CGL, a second hole transport layer HTLb, a second organic light emitting layer EMLb, a second buffer layer BFLb, a second electron transport layer ETLb, and an electron injection layer EIL.

[0143] The hole injection layer HIL, the first hole transport layer HTLa, the first organic light-emitting layer EMLa, the first buffer layer BFLa, the first electron transport layer ETLa, the charge generation layer CGL, the second hole transport layer HTLb, the second organic light-emitting layer EMLb, the second buffer layer BFLb, the second electron transport layer ETLb and the electron injection layer EIL can be sequentially arranged on the partition SPT in the third direction DR3.

[0144] The organic light emitting portion EL may be physically separated into the first light emitting portion EL1 and the second light emitting portion EL2 by the second opening OP2 of the partition SPT.

[0145] In an embodiment, at least one of the plurality of light generation layers constituting the organic light emitting portion EL may be physically separated by the second opening OP2. The plurality of light generation layers may be separated in the second opening OP2. In an embodiment, the hole injection layer HIL and the charge generation layer CGL may be physically separated by the second opening OP2.

[0146] In an embodiment, other light generation layers except the hole injection layer HIL and the charge generation layer CGL may be formed from the first sub-pixel (eg, Figure 7) extends from the first sub-pixel SPX1 shown in FIG. 1 to the third sub-pixel (eg, Figure 7 In another embodiment, other light generating layers including the hole injection layer HIL and the charge generating layer CGL may also be physically separated by the second opening OP2.

[0147] In an embodiment, as the thickness EL_H of the organic light emitting portion EL becomes thicker, the height SPT2_H of the second opening OP2 may become higher. In an embodiment, when the thickness EL_H of the organic light emitting portion EL is about 700 nm to about 800 nm, the height SPT2_H of the second opening OP2 may be about 300 nm to about 400 nm.

[0148] Fig.10 It is shown Figure 6 0047] A cross-sectional view of an embodiment of a pixel is shown in FIG.

[0149] Except for the separator SPT', Figure 7 Components shown in the drawings are identical to or correspond to descriptions of other components.

[0150] Reference Fig.10 The pixel PX′ may include a substrate SUB, an inorganic layer IOL, reflective electrodes RE1 to RE3, first to third subpixel electrodes AE1 to AE3, an organic light emitting portion EL, a second pixel electrode CE, a pixel defining layer PDL, and a spacer SPT′.

[0151] The spacer SPT' may be disposed on the pixel defining layer PDL. A recess RCS may be defined in the spacer SPT'. The recess RCS may be a step difference (or a groove portion) defined in a top surface of the spacer SPT'.

[0152] The recess RCS may physically separate the organic light emitting portion EL disposed on the pixel defining layer PDL into first to third light emitting portions EL1 to EL3 .

[0153] Will refer to Fig.11 The structure of the separator SPT' is described in detail.

[0154] In an embodiment, the organic light emitting portion EL may include a plurality of light generating layers. In an embodiment, the organic light emitting portion EL may be separated into a first light emitting portion EL1, a second light emitting portion EL2, and a third light emitting portion EL3 by a partition SPT'. In another embodiment, some of the plurality of light generating layers constituting the organic light emitting portion EL may extend continuously from the first sub-pixel SPX1 to the third sub-pixel SPX3, but other light generating layers of the plurality of light generating layers constituting the organic light emitting portion EL may be separated by a partition SPT'. In an embodiment, for example, a hole injection layer (e.g., Figure 4 The hole injection layer HIL) and / or the charge generation layer (eg, Figure 5 The charge generation layer CGL) shown in FIG. 1 may be partitioned by a partition member SPT′.

[0155] The organic light emitting portion EL may be disposed in a region surrounded by the partition SPT′. The organic light emitting portion EL may include a first light emitting portion EL1 for forming a first subpixel SPX1, a second light emitting portion EL2 for forming a second subpixel SPX2, and a third light emitting portion EL3 for forming a third subpixel SPX3.

[0156] The spacer SPT′ may be disposed in a boundary region between adjacent light emitting parts EL1 to EL3 (or first to third subpixels SPX1 to SPX3 ).

[0157] The second pixel electrode CE may be disposed on the organic light emitting portion EL. The second pixel electrode CE may be disposed (or formed) as a layer over the entire surface of the first to third light emitting portions EL1 to EL3. The second pixel electrode CE may be disposed according to the contours of the first to third light emitting portions EL1 to EL3 and the partition SPT'. At least a portion of the second pixel electrode CE may be disposed in the recess RCS of the partition SPT'. In an embodiment, when all the multiple light generating layers constituting the organic light emitting portion EL are separated by the partition SPT', the second pixel electrode CE disposed on the recess RCS may contact at least a portion of the partition SPT'.

[0158] In the display device in the disclosed embodiment, the organic light emitting portion EL commonly provided in the first sub-pixel SPX1 to the third sub-pixel SPX3 can be separated into the first light emitting portion EL1 to the third light emitting portion EL3 respectively corresponding to the sub-pixels by the separator SPT'. Therefore, the lateral leakage phenomenon caused by the organic light emitting portion commonly provided in the first sub-pixel SPX1 to the third sub-pixel SPX3 between adjacent sub-pixels can be reduced or prevented, thereby preventing the brightness or color purity of the display device from being deteriorated.

[0159] Fig.11 It is shown Fig.10An enlarged view of an embodiment of region B is shown in FIG.

[0160] Reference Fig.11 , the spacer SPT′ may be disposed on the pixel defining layer PDL.

[0161] In an embodiment, the spacer SPT′ may include a first pattern SP1, a second pattern SP2, and a first film SP3.

[0162] In an embodiment, the first pattern SP1 and the second pattern SP2 may be disposed on the top surface of the pixel defining layer PDL to be spaced apart from each other in the first direction DR1. In an embodiment, the cross-sectional shape of the first pattern SP1 and the second pattern SP2 may be a quadrilateral shape. However, the disclosure is not limited thereto, and the cross-sectional shape of the first pattern SP1 and the second pattern SP2 may be a polygonal shape other than a quadrilateral shape, such as a triangular shape. In an embodiment, the first pattern SP1 and the second pattern SP2 may have the same shape, but the disclosure is not limited thereto. In an embodiment, the separation distance between the first pattern SP1 and the second pattern SP2 may be about 135 nm or more. However, the disclosure is not limited thereto, and the separation distance between the first pattern SP1 and the second pattern SP2 may be set to a separation distance at which a plurality of light generating layers constituting the organic light emitting portion EL can be separated by the recessed RCS.

[0163] In an embodiment, the recess RCS may be defined by a separation space of the first pattern SP1 and the second pattern SP2.

[0164] In an embodiment, the first film SP3 may cover the first pattern SP1, the second pattern SP2, and the recessed RCS. In an embodiment, the first film SP3 may cover the first pattern SP1 and the second pattern SP2 as a whole. The first film SP3 may have a surface profile corresponding to the shapes of the first pattern SP1, the second pattern SP2, and the recessed RCS. In an embodiment, the first film SP3 may include a first portion covering the first pattern SP1, a second portion covering the second pattern SP2, and a third portion covering the pixel defining layer PDL exposed between the first pattern SP1 and the second pattern SP2.

[0165] In an embodiment, the partition SPT′ may cut the organic light emitting portion (eg, the organic light emitting portion) in the third direction DR3 by the recess RCS defined between the first pattern SP1 and the second pattern SP2. Fig.10 The organic light emitting part EL shown in FIG. 1 ). The partition SPT′ can physically separate the organic light emitting part EL into the first light emitting part EL1 to the third light emitting part EL3. Since the first light emitting part EL1 to the third light emitting part EL3 are physically separated from each other, the movement of charges / holes is blocked, thereby maintaining an electrical short circuit state.

[0166] In an embodiment, the spacer SPT' may have a width SPT'_D. The width SPT'_D may be about 1000 nm.

[0167] In an embodiment, the height RCS_H of the recess RCS may have a height within a range for cutting the organic light emitting portion EL. In an embodiment, as the height of the organic light emitting portion EL in the third direction DR3 becomes higher, the height RCS_H of the recess RCS may become higher. In an embodiment, when the height of the organic light emitting portion EL is about 700 nm to about 800 nm, the height RCS_H of the recess RCS may be about 300 nm to about 400 nm.

[0168] In an embodiment, the width RCS_D of the recess RCS may be determined by considering the height of the organic light-emitting portion EL and / or the thickness of the second pixel electrode CE. As the width RCS_D of the recess RCS becomes wider, the second pixel electrode CE is not cut and may be disposed on the recess RCS. As the width RCS_D of the recess RCS becomes narrower, the second pixel electrode CE may be cut together with the organic light-emitting portion EL. Therefore, the width RCS_D of the recess RCS may be determined within a range in which the second pixel electrode CE is not cut when the organic light-emitting portion EL is cut. In an embodiment, the width RCS_D of the recess RCS may be approximately 135 nm or less.

[0169] In an embodiment, the first and second patterns SP1 and SP2 may include the same material, and the first film SP3 may include a material different from that of the first and second patterns SP1 and SP2.

[0170] In an embodiment, the first pattern SP1 and the second pattern SP2 may include a metal material. In an embodiment, the first pattern SP1 and the second pattern SP2 may include at least one of various metal materials including silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), titanium (Ti), molybdenum (Mo), copper (Cu), etc., but the disclosure is not limited thereto. The first pattern SP1 and the second pattern SP2 may include at least one conductive material among alloys including the above-mentioned metal materials, conductive oxides (such as ITO, IZO, ITZO, AZO, GZO, ZTO or GTO) and conductive polymers (such as PEDOT), but the disclosure is not necessarily limited thereto.

[0171] In an embodiment, the first film SP3 may include an inorganic material. The first film SP3 may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum nitride (AlNx ), aluminum oxide (AlO x ), zirconium oxide (ZrO x ), hafnium oxide (HfO x ) and titanium oxide (TiO x ) at least one of.

[0172] In an embodiment, a plurality of light generating layers constituting the organic light emitting portion EL may be separated by a partition SPT'. The plurality of light generating layers may include a hole injection layer (eg, Figure 4 and Figure 5 The hole injection layer HIL shown in FIG. 1 ), the hole transport layer (eg, Figure 4 The hole transport layer HTL shown in FIG. Figure 5 , the first hole transport layer HTLa and the second hole transport layer HTLb shown in FIG. 1 ), an organic light emitting layer (eg, Figure 4 The organic light emitting layer EML shown in Figure 5 , a first organic light-emitting layer EMLa and a second organic light-emitting layer EMLb), an electron transport layer (eg, Figure 4 The electron transport layer ETL shown in Figure 5 , a first electron transport layer ETLa and a second electron transport layer ETLb as shown in FIG. 1 ), a charge generating layer (eg, Figure 5 The charge generation layer CGL shown in FIG. 1 and the electron injection layer (eg, Figure 4 and Figure 5 In the embodiment, at least one of the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the charge generation layer, and the electron injection layer may be cut by the partition SPT' in the recess RCS. The plurality of light generation layers cut by the partition SPT' may not be disposed on the first film SP3 disposed between the first pattern SP1 and the second pattern SP2. In the embodiment, for example, the hole injection layer (for example, Figure 4 and Figure 5 The hole injection layer HIL) and / or the charge generation layer (eg, Figure 5 The charge generation layer CGL shown in FIG. 1 may be separated by a separator SPT′. The hole injection layer and the charge generation layer may not be disposed on the first film SP3 disposed between the first pattern SP1 and the second pattern SP2.

[0173] The display device in the disclosed embodiment may include first to third light emitting parts EL1 to EL3 separated from each other by a partition SPT' relative to the recess RCS. Among the plurality of light generating layers constituting the first to third light emitting parts EL1 to EL3, except for the hole injection layer (e.g., Figure 5 The hole injection layer HIL shown in FIG. 1 and the charge generation layer (eg, Figure 5 The other light generating layers except the charge generating layer CGL shown in the figure may extend while being shared by the first to third light emitting portions EL1 to EL3. Therefore, the other light generating layers except the hole injection layer HIL and the charge generating layer CGL may be disposed on the first film SP3 disposed between the first pattern SP1 and the second pattern SP2. Since the other light generating layers except the hole injection layer HIL and the charge generating layer CGL are disposed on the first film SP3, a coupling phenomenon between adjacent sub-pixels SPX1 to SPX3 may be prevented.

[0174] Figures 12 to 17 is a schematic cross-sectional view illustrating an embodiment of a method of manufacturing a display device according to the disclosure.

[0175] The method of manufacturing a display device in the disclosed embodiment may include: forming first to third sub-pixel electrodes AE1 to AE3 of respective first to third sub-pixels SPX1 to SPX3 spaced apart from each other in a first direction DR1 on a base substrate BSL (refer to Fig.12 ); forming a pixel defining layer PDL that defines a first opening OP1 that exposes the first sub-pixel electrode AE1 to the third sub-pixel electrode AE3 (refer to Fig.13 ); forming a first layer SPT1 on the pixel defining layer PDL (refer to Fig.14 ); forming a second layer SPT2 defining a second opening OP2 exposing the first layer SPT1 (refer to Fig.15 and Fig.16 ); and forming an organic light emitting portion EL including a plurality of light generating layers and a second pixel electrode CE disposed on a first layer SPT1 and a second layer SPT2 (refer to Fig.17 ).

[0176] Reference Fig.12 , the first to third sub-pixel electrodes AE1 to AE3 may be disposed on the base substrate BSL to be spaced apart from each other in the first direction DR1.

[0177] In an embodiment, the base substrate (also referred to as a base layer) BSL may be a rigid substrate or a flexible substrate or a rigid film or a flexible film. In an embodiment, the base layer BSL may be a rigid substrate including glass or tempered glass, a flexible substrate (or film) including a plastic or metal material, or at least one insulating layer. The material and / or properties of the base layer BSL are not specifically limited. In an embodiment, the base layer BSL may be substantially transparent. The term "substantially transparent" may mean that light can be transmitted with a predetermined transmittance or greater transmittance. In another embodiment, the base layer BSL may be translucent or opaque. In addition, in some embodiments, the base layer BSL may include a reflective material. In the disclosure, the base substrate BSL may be designated as a base substrate or a substrate.

[0178] Reference Fig.13 , a pixel defining layer PDL defining a first opening OP1 exposing the first sub-pixel electrode AE1 to the third sub-pixel electrode AE3 may be formed on the first sub-pixel electrode AE1 to the third sub-pixel electrode AE3. In an embodiment, the first opening OP1 may include a 1_1 opening OP1_1, a 1_2 opening OP1_2, and a 1_3 opening OP1_3. The 1_1 opening OP1_1 may expose the first sub-pixel electrode AE1. The 1_2 opening OP1_2 may expose the second sub-pixel electrode AE2. The 1_3 opening OP1_3 may expose the third sub-pixel electrode AE3. The first opening OP1 may define a region in which a light emitting portion (e.g., the first light emitting portion EL1 to the third light emitting portion EL3) is formed.

[0179] In an embodiment, the pixel defining layer PDL may include an inorganic material. In an embodiment, for example, the pixel defining layer PDL may include silicon oxide (SiO x ) and silicon nitride (SiN x ) In some embodiments, the pixel defining layer PDL may have a layer including silicon oxide (SiO x ) layer and a layer including silicon nitride (SiN x ) of the layers. However, the disclosure is not limited thereto.

[0180] Reference Fig.14, a first layer SPT1 may be formed on the pixel defining layer PDL. In an embodiment, a first layer SPT1 may be provided on the top surface of the pixel defining layer PDL. The first layer SPT1 may include a metal material. The first layer SPT1 may include at least one of various metal materials including silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), titanium (Ti), molybdenum (Mo), copper (Cu), etc., but the disclosure is not limited thereto. The first layer SPT1 may include at least one conductive material including an alloy including the above-mentioned metal materials, a conductive oxide (such as ITO, IZO, ITZO, AZO, GZO, ZTO or GTO) and a conductive polymer (such as PEDOT), but the disclosure is not necessarily limited thereto.

[0181] In an embodiment, the first layer SPT1 may be formed on the pixel defining layer PDL through a developing process and an etching process. The height of the first layer SPT1 may be lower than that of the pixel defining layer PDL.

[0182] Reference Fig.15 , a second layer SPT2' may be formed on the first layer SPT1. The second layer SPT2' may be formed by depositing an inorganic layer on the first layer SPT1. In an embodiment, the second layer SPT2' may include an inorganic material. The second layer SPT2' may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum nitride (AlN x ), aluminum oxide (AlO x )、ZrO x ), hafnium oxide (HfO x ) and titanium oxide (TiO x ) at least one of.

[0183] In an embodiment, the height of the second layer SPT2' in the third direction DR3 may be determined according to the organic light emitting portion (eg, Fig.17 In the embodiment, as the thickness of the organic light emitting portion EL becomes thicker, the height of the second layer SPT2' may become higher.

[0184] Reference Fig.16 , the second opening OP2 may be defined by removing at least a portion of the second layer SPT2'. In an embodiment, a region of the second layer SPT2' may be etched. The etching may be wet etching or dry etching, but the disclosure is not limited to the predetermined example. In an embodiment, an exposure process, a development process, and an etching process may be performed on the second layer SPT2'. Although not disclosed in Fig.16 Although not shown in FIG. 4 , a photoresist layer including a photosensitive material may be applied on the second layer SPT2 ′.

[0185] The mask MK including the first region MK1_1 and the second region MK1_2 can be used for the exposure process and the development process of the second layer SPT2'. Due to the difference in transmittance between the first region MK1_1 and the second region MK1_2 of the mask MK, the degree to which the second layer SPT2' is etched can vary for each region. The second region MK1_2 can be a light-transmitting region, and the first region MK1_1 can be a light-blocking region. When the region of the second layer SPT2' overlapping with the second region MK1_2 is removed and the region overlapping with the first region MK1_1 is retained, the second opening OP2 can be defined in the region corresponding to the second region MK1_2.

[0186] Reference Fig.17 , an organic light emitting portion EL including a plurality of light generating layers may be formed on the first layer SPT1 and the second layer SPT2 , and a second pixel electrode CE may be formed on the organic light emitting portion EL.

[0187] The organic light emitting portion EL may include a relatively low molecular weight organic material or a relatively high molecular weight organic material. The organic light emitting portion EL may be formed by vapor deposition, printing, or slit coating, but the disclosure is not limited thereto.

[0188] The organic light emitting portion EL may also be formed in the first to third sub-pixels SPX1 to SPX3 and in the boundary regions between the first to third sub-pixels SPX1 to SPX3. The organic light emitting portion EL may be physically separated into the first to third light emitting portions EL1 to EL3 by a partition SPT provided in the boundary regions between the first to third sub-pixels SPX1 to SPX3.

[0189] The second pixel electrode CE may be a common electrode commonly formed in the first to third sub-pixels SPX1 to SPX3 .

[0190] In the display device and the method for manufacturing the display device in the disclosed embodiment, since the spacer SPT or SPT' is disposed (or formed) between adjacent sub-pixels, at least some of the layers constituting the organic light emitting portion EL can be cut. Therefore, the lateral leakage phenomenon caused by the organic light emitting portion being commonly disposed in the sub-pixels can be reduced or prevented.

[0191] Fig.18 and Fig.19 Shown include Figure 1 An embodiment of an electronic device of a display device shown in FIG.

[0192] Reference Fig.18, the display device according to the above-described embodiment may be applied to smart glasses. The smart glasses include a frame 111 and a lens portion 112. The smart glasses are wearable electronic devices that can be worn on the face of a user, and may have a structure in which a portion of the frame 111 is folded or unfolded. In an embodiment, for example, the smart glasses may be a wearable device for augmented reality ("AR").

[0193] The frame 111 may include a housing 111b supporting the lens portion 112 and legs 111a for allowing a user to wear the smart glasses. The legs 111a may be connected to the housing 111b by a hinge to be folded or unfolded.

[0194] A battery, a touch pad, a microphone, and / or a camera may be built in the frame 111. In addition, a projector for outputting light and / or a processor for controlling an optical signal may be built in the frame 111.

[0195] The lens portion 112 may be an optical member that allows light to be transmitted therethrough or allows light to be reflected therefrom. The lens portion 112 may include glass and / or a transparent synthetic resin.

[0196] The display device according to the above-described embodiment may be applied to the lens portion 112. In an embodiment, the user may recognize an image displayed by an optical signal transmitted from the projector of the frame 111 through the lens portion 112. In an embodiment, for example, the user may recognize information including time, data, etc. displayed on the lens portion 112.

[0197] Reference Fig.19 The display device according to the above-described embodiment may be applied to a head mounted display ("HMD"). The HMD may include a head mounted band 121 and a display housing 122. In an embodiment, for example, the HMD is a wearable electronic device that can be worn on the user's head.

[0198] The headband 121 may be connected to the display housing 122 to fix the display housing 122. Fig.19 As shown in , the head-mounted band 121 may include a horizontal band and a vertical band to fix the HMD to the user's head. The horizontal band may be set to surround the side of the user's head, and the vertical band may be set to surround the top of the user's head. However, the disclosure is not necessarily limited thereto, and the head-mounted band 121 may be implemented in the shape of a glasses frame or a helmet.

[0199] The display housing 122 houses the display device and may include at least one lens. At least one lens may provide an image to a user. In an embodiment, for example, the display device according to the above-described embodiment may be applied to a left eye lens and a right eye lens implemented in the display housing 122.

[0200] In the display device and the method for manufacturing the display device according to the disclosure, since a partition is provided (or formed) between adjacent sub-pixels, at least some of the layers constituting the organic light-emitting portion can be cut. Therefore, the lateral leakage phenomenon caused by the organic light-emitting portion being commonly provided in the sub-pixels can be reduced or prevented.

[0201] The disclosed embodiments should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

[0202] While the invention has been particularly shown and described with reference to embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit or scope of the invention as defined by the appended claims.

Claims

1. A display device, the display device include: a substrate, including sub-pixels; A first pixel electrode is disposed on the substrate; A pixel defining layer, disposed on the first pixel electrode, wherein the pixel defining layer defines a first opening exposing the first pixel electrode; a spacer disposed on a top surface of the pixel defining layer, the spacer comprising: a first layer disposed on the pixel defining layer; and a second layer disposed on the first layer, the second layer defining a second opening exposing the first layer; an organic light emitting portion disposed on the pixel defining layer and the partition, the organic light emitting portion including a plurality of light generating layers; and The second pixel electrode is arranged on the organic light emitting portion.

2. The display device according to claim 1, in, The first layer comprises a metallic material, and The second layer includes an inorganic material.

3. The display device according to claim 1, in, At least a portion of the second pixel electrode is disposed in the second opening.

4. The display device according to claim 3, in, The second pixel electrode is directly disposed on the first layer exposed by the second opening.

5. The display device according to claim 1, in, The organic light emitting portion includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, a charge generation layer, and an electron injection layer sequentially arranged in a third direction intersecting the first direction, and Wherein, at least one of the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the charge generation layer, and the electron injection layer is not disposed on the first layer exposed through the second opening.

6. The display device according to claim 5, in, The hole injection layer and the charge generation layer are not disposed on the first layer exposed through the second opening.

7. The display device according to claim 1, further comprising: include: The reflective electrode of the sub-pixel is arranged between the substrate and the first pixel electrode.

8. The display device according to claim 7, wherein the display device further comprises: include: an inorganic layer disposed on the substrate, Wherein, the substrate comprises a silicon substrate, and Wherein, the reflective electrode is directly arranged on the substrate.

9. The display device according to claim 1, in, The height of the second layer in the third direction is 400 nanometers, and Wherein, the second opening has a width of 135 nanometers or less.

10. The display device according to claim 1, further comprising: include: An encapsulation layer, disposed on the second pixel electrode; as well as The color filter layer includes first to third color filters, which are disposed on the encapsulation layer while being spaced apart from each other in a first direction.

11. A display device, the display device include: a substrate, including sub-pixels; A first pixel electrode is disposed on the substrate; A pixel defining layer, disposed on the first pixel electrode, wherein the pixel defining layer defines a first opening exposing the first pixel electrode; a spacer disposed on a top surface of the pixel defining layer, the spacer comprising: a first pattern and a second pattern disposed on the pixel defining layer, the first pattern and the second pattern being spaced apart from each other in a first direction; and a first film covering the first pattern and the second pattern; an organic light emitting portion disposed on the pixel defining layer and the partition, the organic light emitting portion including a plurality of light generating layers; and The second pixel electrode is arranged on the organic light emitting portion.

12. The display device according to claim 11, in, The first pattern and the second pattern include a metal material, and The first film includes an inorganic material.

13. The display device according to claim 12, in, A recess is defined between the first pattern and the second pattern, and Wherein, at least a portion of the second pixel electrode is disposed in the recess.

14. The display device according to claim 13, in, The height of the recess in a third direction intersecting the first direction is 400 nanometers, and The width of the recess in the first direction is 135 nanometers.

15. The display device according to claim 13, in, The first film includes: a first portion covering the first pattern; a second portion covering the second pattern; and a third portion covering the pixel defining layer exposed between the first pattern and the second pattern.

16. The display device according to claim 15, in, The organic light emitting portion includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, a charge generation layer, and an electron injection layer sequentially arranged in a third direction intersecting the first direction, and wherein at least one of the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the charge generation layer, and the electron injection layer is not disposed on the third portion of the first film.

17. The display device according to claim 16, in, The hole injection layer and the charge generation layer are not provided on the third portion of the first film.

18. The display device according to claim 16, in, The second pixel electrode is disposed directly on the third portion of the first film.

19. A method for manufacturing a display device, the method include: forming a first pixel electrode of a sub-pixel on a substrate; forming a pixel defining layer, wherein the pixel defining layer defines a first opening exposing the first pixel electrode; forming a first layer on a top surface of the pixel defining layer; forming a second layer on the first layer, the second layer defining a second opening exposing the first layer; forming an organic light-emitting portion disposed on the first layer and the second layer, the organic light-emitting portion including a plurality of light-generating layers; as well as forming a second pixel electrode on the organic light emitting portion, Wherein, the height of the second layer is proportional to the height of the organic light-emitting portion.

20. The method according to claim 19, in, The step of forming the second layer defining the second opening comprises: forming an inorganic layer on the first layer; and The second opening is defined by etching and removing a portion of the inorganic layer.

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