Display apparatus and manufacturing the same

Abstract

The present invention provides a display device comprising: a substrate; a first electrode disposed on the substrate; a first pixel defining film disposed on the first electrode and having a first opening that exposes at least a portion of the first electrode and comprising a pigment; and a second pixel defining film disposed on the first pixel defining film and comprising a dye.

Description

Technology Field

[0001] The present invention relates to a display device and a method for manufacturing the same, and more specifically, to a display device with reduced reflection of external light and a method for manufacturing the same. Background Technology

[0002] As a display device for displaying images, an Organic Light Emitting Diode (OLED) display apparatus possesses self-emissive properties, unlike a Liquid Crystal Display (LCD). Therefore, since it does not require a separate light source, its thickness and weight can be reduced. Furthermore, OLED displays can exhibit high-quality characteristics such as low power consumption, high brightness, and high response speed. The problem to be solved

[0003] The aforementioned organic light-emitting diode display device must have good contrast and brightness, but the contrast may be poor when the external light is bright. To prevent this, a pixel defining film having a specific color (e.g., black, etc.) can be formed; however, there is a problem in that dark spots occur due to residues generated during the process of forming a colored pixel defining film. The present invention aims to solve various problems, including the aforementioned problem, and can provide a display device and a method for manufacturing the same that can prevent a reduction in characteristics with respect to external light and simultaneously prevent defects caused by the occurrence of dark spots. However, these problems are exemplary and the scope of the present invention is not limited by them. means of solving the problem

[0004] According to one aspect of the present invention, a display device is provided comprising: a substrate; a first electrode disposed on the substrate; a first pixel defining film disposed on the first electrode and having a first opening that exposes at least a portion of the first electrode and comprising a pigment; and a second pixel defining film disposed on the first pixel defining film and comprising a dye.

[0005] In this embodiment, the first pixel defining film may have an optical density of 1 or more.

[0006] In this embodiment, the optical density of the first pixel defining film may be equal to or greater than the optical density of the second pixel defining film.

[0007] In this embodiment, the first pixel defining film comprises a plurality of particles, and the average size of the plurality of particles may be 200 nm or less.

[0008] In the present embodiment, the second pixel defining film may include a second opening that exposes at least a portion of the first electrode.

[0009] In this embodiment, the width of the first opening may be larger than the width of the second opening.

[0010] In this embodiment, the second pixel defining film can cover the upper surface and side surface of the first pixel defining film.

[0011] In this embodiment, the second pixel defining film can be in direct contact with the first electrode.

[0012] In the present embodiment, the first pixel defining film may include a negative photosensitive material, and the second pixel defining film may include a positive photosensitive material.

[0013] In the present embodiment, the first pixel defining film and the second pixel defining film may include a negative photosensitive material.

[0014] In the present embodiment, the first pixel defining film and the second pixel defining film may include a positive photosensitive material.

[0015] In the present embodiment, the first pixel defining film may include a positive photosensitive material, and the second pixel defining film may include a negative photosensitive material.

[0016] In the present embodiment, a spacer disposed on the second pixel defining film is further included, and the spacer may include the same material as the second pixel defining film.

[0017] In this embodiment, the first pixel defining film and the spacer may comprise different materials.

[0018] In the present embodiment, the intermediate layer may further include a light-emitting layer filling the second opening, and a second electrode disposed on the intermediate layer.

[0019] In the present embodiment, a thin film encapsulation layer may be further included, disposed on the second electrode and comprising at least one inorganic film layer and at least one organic film layer.

[0020] In the present embodiment, an optical functional layer may further include a color filter disposed on the thin film encapsulation layer and overlapping at least partially with the first opening, and a black matrix surrounding the color filter.

[0021] In this embodiment, the black matrix may overlap at least partially with the first pixel defining film.

[0022] In this embodiment, the black matrix may overlap at least partially with the second pixel defining film.

[0023] According to another aspect of the present invention, a method for manufacturing a display device is provided, comprising: forming a first colored material layer containing a pigment on a first electrode; exposing a portion of the first colored material layer to light; developing the exposed first colored material layer to form a first pixel defining film having a first opening that exposes at least a portion of the first electrode; forming a second colored material layer containing a dye on the first electrode and the first pixel defining film; exposing a portion of the second colored material layer to light; and developing the exposed second colored material layer to form a second pixel defining film having a second opening that exposes at least a portion of the first electrode.

[0024] In the present embodiment, in the operation of developing the exposed second colored material layer to form the second pixel defining film, the second pixel defining film and a spacer integrally provided with the second pixel defining film may be formed.

[0025] In the present embodiment, the first pixel defining film may include a negative photosensitive material, and the second pixel defining film may include a positive photosensitive material.

[0026] In this embodiment, the optical density of the first pixel defining film may be equal to or greater than the optical density of the second pixel defining film.

[0027] In this embodiment, the first opening and the second opening may overlap at least partially.

[0028] In this embodiment, the width of the first opening may be larger than the width of the second opening.

[0029] In this embodiment, the second pixel defining film can cover the upper surface and side surface of the first pixel defining film.

[0030] In this embodiment, the second pixel defining film can be in direct contact with the first electrode.

[0031] In the present embodiment, the first pixel defining film and the second pixel defining film may include a negative photosensitive material.

[0032] In the present embodiment, the first pixel defining film and the second pixel defining film may include a positive photosensitive material.

[0033] In the present embodiment, the first pixel defining film may include a positive photosensitive material, and the second pixel defining film may include a negative photosensitive material.

[0034] Other aspects, features, and advantages other than those described above will become clear from the following specific details, claims, and drawings for implementing the invention. Effects of the invention

[0035] According to one embodiment of the present invention as described above, a display device can be provided that prevents the occurrence of dark spots and prevents or minimizes contrast degradation. Of course, the scope of the present invention is not limited by these effects. Brief explanation of the drawing

[0036] FIG. 1 is a perspective view schematically illustrating a display device according to one embodiment. FIG. 2 is a plan view schematically illustrating a display device according to one embodiment. FIGS. 3 and FIGS. 4 are equivalent circuit diagrams of pixels that may be included in a display device according to one embodiment. FIG. 5 is a cross-sectional view schematically illustrating a display device according to one embodiment. FIG. 6 is a cross-sectional view schematically illustrating a display device according to one embodiment. FIGS. 7 and FIGS. 8 are cross-sectional views schematically illustrating a display device according to one embodiment. FIGS. 9 to 15 are cross-sectional views illustrating a process according to a method for manufacturing a display device according to one embodiment. FIGS. 16 and FIGS. 17 are cross-sectional views illustrating a process according to a method for manufacturing a display device according to one embodiment. Specific details for implementing the invention

[0037] The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms.

[0038] In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component.

[0039] In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0040] In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added.

[0041] In the following embodiments, when a part such as a film, region, or component is described as being on or above another part, it includes not only cases where it is directly on top of another part, but also cases where another film, region, or component is interposed in between.

[0042] In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and therefore the present invention is not necessarily limited to what is illustrated.

[0043] In this specification, "A and / or B" indicates the case where it is A, B, or both A and B. Additionally, in this specification, "at least one of A and B" indicates the case where it is A, B, or both A and B.

[0044] In the following embodiments, the meaning of "the wiring extends in a first direction or a second direction" includes not only extending in a straight line shape, but also extending in a zigzag or curved shape along the first direction or the second direction.

[0045] In the following embodiments, "planar" refers to the view of the target part from above, and "cross-sectional" refers to the view of the cross-section obtained by vertically cutting the target part from the side. In the following embodiments, "superimposition" includes the superposition of the "planar" and "cross-sectional" views.

[0046] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings, and when describing with reference to the drawings, identical or corresponding components will be given the same reference numerals.

[0047] FIG. 1 is a perspective view schematically illustrating a display device according to one embodiment.

[0048] Referring to FIG. 1, a display device (1) may include a display area (DA) and a peripheral area (PA) disposed around the display area (DA). The peripheral area (PA) may surround at least a portion of the display area (DA). The display device (1) may provide an image using light emitted from pixels (P) disposed in the display area (DA), and the peripheral area (PA) may be a non-display area where the image is not displayed.

[0049] In the following description, an organic light-emitting diode display device is used as an example of a display device (1) according to one embodiment, but the display device is not limited thereto. In one embodiment, the display device (1) may be a display device such as an inorganic light-emitting diode display apparatus or a quantum dot light-emitting diode display apparatus. For example, the light-emitting layer of a display element provided in the display device (1) may include an organic material, an inorganic material, a quantum dot, an organic material and a quantum dot, or an inorganic material and a quantum dot.

[0050] In FIG. 1, a display device (1) having a flat display surface is shown, but the present invention is not limited thereto. In one embodiment, the display device (1) may include a three-dimensional display surface or a curved display surface.

[0051] When the display device (1) includes a three-dimensional display surface, the display device (1) includes a plurality of display areas indicating different directions, and, for example, may include a polygonal columnar display surface. In one embodiment, when the display device (1) includes a curved display surface, the display device (1) may be implemented in various forms such as a flexible, foldable, or rollable display device.

[0052] FIG. 1 illustrates a display device (1) that can be applied to a mobile phone terminal. Although not illustrated, an electronic module, camera module, power module, etc. mounted on a main board can be arranged together with the display device (1) in a bracket / case, etc. to form a mobile phone terminal. In particular, the display device (1) can be applied to large electronic devices such as televisions and monitors, as well as small and medium-sized electronic devices such as tablets, car navigation systems, game consoles, and smartwatches.

[0053] In FIG. 1, the display area (DA) of the display device (1) is shown as a square, but the shape of the display area (DA) may be a circle, an ellipse, or a polygon such as a triangle or a pentagon.

[0054] A display device (1) may include pixels (P) arranged in a display area (DA). Each of the pixels (P) may include an organic light-emitting diode (OLED). Each of the pixels (P) may emit light of, for example, red, green, blue, or white through the organic light-emitting diode (OLED). A pixel (P) can be understood as a pixel that emits light of any one of the colors red, green, blue, or white, as described above.

[0055] FIG. 2 is a plan view schematically illustrating a display device according to one embodiment.

[0056] Referring to FIG. 2, the display device (1) may include pixels (P) placed in a display area (DA). Each pixel (P) may be electrically connected to an outer circuit placed in a peripheral area (PA). A first scan driving circuit (10), a first light-emitting driving circuit (15), a second scan driving circuit (20), a terminal (40), a data driving circuit (50), a first power supply wiring (60), and a second power supply wiring (70) may be placed in the peripheral area (PA).

[0057] The first scan driving circuit (10) can provide a scan signal to each pixel (P) through a scan line (SL). The first light-emitting driving circuit (15) can provide a light-emitting control signal to each pixel (P) through a light-emitting control line (EL). The second scan driving circuit (20) can be arranged parallel to the first scan driving circuit (10) with a display area (DA) in between. In one embodiment, some of the pixels (P) placed in the display area (DA) may be electrically connected to the first scan driving circuit (10), and the rest may be electrically connected to the second scan driving circuit (20). In one embodiment, the second scan driving circuit (20) may be omitted.

[0058] The first light-emitting driving circuit (15) may be positioned on a peripheral area (PA) spaced apart from the first scan driving circuit (10) in the x-direction. Additionally, the first light-emitting driving circuit (15) may be positioned alternately with the first scan driving circuit (10) in the y-direction.

[0059] A terminal (40) may be disposed on one side of the substrate (100). The terminal (40) may be exposed without being covered by an insulating layer and may be electrically connected to a printed circuit board (PCB). A terminal (PCB-P) of the printed circuit board (PCB) may be electrically connected to a terminal (40) of a display device (1). The printed circuit board (PCB) may transmit a signal or power from a control unit (not shown) to the display device (1). A control signal generated by the control unit may be transmitted to the first scan driving circuit (10), the first light-emitting driving circuit (15), and the second scan driving circuit (20), respectively, through the printed circuit board (PCB). The control unit may provide a first power supply voltage (ELVDD) and a second power supply voltage (ELVSS), respectively, to the first power supply wiring (60) and the second power supply wiring (70) through the first connecting wiring (61) and the second connecting wiring (71). The first power supply voltage (ELVDD) is provided to each pixel (P) through a driving voltage line (PL) connected to the first power supply wiring (60), and the second power supply voltage (ELVSS) can be provided to the second electrode of each pixel (P) connected to the second power supply wiring (70).

[0060] The data driving circuit (50) can be electrically connected to a data line (DL). The data signal of the data driving circuit (50) can be provided to each pixel (P) through a connecting wire (51) connected to the terminal (40) and a data line (DL) connected to the connecting wire (51).

[0061] FIG. 2 illustrates that the data driving circuit (50) is placed on a printed circuit board (PCB), but in one embodiment, the data driving circuit (50) may be placed on a substrate (100). For example, the data driving circuit (50) may be placed between a terminal (40) and a first power supply line (60).

[0062] The first power supply wiring (60) may include a first sub-wiring (62) and a second sub-wiring (63) that extend parallel along the x-direction with the display area (DA) in between. The second power supply wiring (70) may partially surround the display area (DA) in a loop shape with one side open.

[0063] FIGS. 3 and FIGS. 4 are equivalent circuit diagrams of pixels that may be included in a display device according to one embodiment.

[0064] Referring to FIG. 3, the pixel circuit (PC) can be connected to an organic light-emitting diode (OLED) to enable light emission of the pixels. The pixel circuit (PC) may include a driving thin-film transistor (T1), a switching thin-film transistor (T2), and a storage capacitor (Cst). The switching thin-film transistor (T2) is connected to a scan line (SL) and a data line (DL), and can transmit a data signal (Dm) input through the data line (DL) to the driving thin-film transistor (T1) according to a scan signal (Sn) input through the scan line (SL).

[0065] The storage capacitor (Cst) is connected to the switching thin-film transistor (T2) and the driving voltage line (PL), and can store a voltage corresponding to the difference between the voltage received from the switching thin-film transistor (T2) and the first power supply voltage (ELVDD) supplied to the driving voltage line (PL).

[0066] The driving thin-film transistor (T1) is connected to the driving voltage line (PL) and the storage capacitor (Cst), and can control the driving current flowing from the driving voltage line (PL) to the organic light-emitting diode (OLED) in correspondence with the voltage value stored in the storage capacitor (Cst). The organic light-emitting diode (OLED) can emit light having a predetermined brightness by the driving current.

[0067] Figure 3 describes a case where the pixel circuit (PC) includes two thin-film transistors and one storage capacitor, but the present invention is not limited thereto.

[0068] Referring to FIG. 4, the pixel circuit (PC) may include a driving thin-film transistor (T1), a switching thin-film transistor (T2), a compensation thin-film transistor (T3), a first initialization thin-film transistor (T4), an operation control thin-film transistor (T5), a light emission control thin-film transistor (T6), a second initialization thin-film transistor (T7), and a storage capacitor (Cst).

[0069] FIG. 4 illustrates a case in which signal lines (SL, SL-1, SL+1, EL, DL), an initialization voltage line (VL), and a driving voltage line (PL) are provided for each pixel circuit (PC), but the present invention is not limited thereto. In one embodiment, at least one of the signal lines (SL, SL-1, SL+1, EL, DL), or / and the initialization voltage line (VL) may be shared among neighboring pixel circuits.

[0070] The drain electrode of the driving thin-film transistor (T1) can be electrically connected to the organic light-emitting diode (OLED) via the light-emitting control thin-film transistor (T6). The driving thin-film transistor (T1) can receive a data signal (Dm) according to the switching operation of the switching thin-film transistor (T2) and supply a driving current to the organic light-emitting diode (OLED).

[0071] The gate electrode of the switching thin-film transistor (T2) can be connected to the scan line (SL), and the source electrode can be connected to the data line (DL). The drain electrode of the switching thin-film transistor (T2) is connected to the source electrode of the driving thin-film transistor (T1) and can be connected to the driving voltage line (PL) via the operation control thin-film transistor (T5).

[0072] The switching thin-film transistor (T2) can perform a switching operation in which it is turned on according to the scan signal (Sn) received through the scan line (SL) and transmits the data signal (Dm) transmitted through the data line (DL) to the source electrode of the driving thin-film transistor (T1).

[0073] The gate electrode of the compensation thin film transistor (T3) can be connected to the scan line (SL). The source electrode of the compensation thin film transistor (T3) is connected to the drain electrode of the driving thin film transistor (T1) and can be connected to the first electrode of the organic light-emitting diode (OLED) via the light-emitting control thin film transistor (T6). The drain electrode of the compensation thin film transistor (T3) can be connected together with one electrode of the storage capacitor (Cst), the source electrode of the first initialization thin film transistor (T4), and the gate electrode of the driving thin film transistor (T1). The compensation thin film transistor (T3) is turned on according to the scan signal (Sn) received through the scan line (SL) to connect the gate electrode and the drain electrode of the driving thin film transistor (T1) to each other, thereby making the driving thin film transistor (T1) diode-connected.

[0074] The gate electrode of the first initialization thin film transistor (T4) can be connected to the previous scan line (SL-1). The drain electrode of the first initialization thin film transistor (T4) can be connected to the initialization voltage line (VL). The source electrode of the first initialization thin film transistor (T4) can be connected together with one electrode of the storage capacitor (Cst), the drain electrode of the compensation thin film transistor (T3), and the gate electrode of the driving thin film transistor (T1). The first initialization thin film transistor (T4) can be turned on according to the previous scan signal (Sn-1) received through the previous scan line (SL-1) to transmit an initialization voltage (Vint) to the gate electrode of the driving thin film transistor (T1) and perform an initialization operation to initialize the voltage of the gate electrode of the driving thin film transistor (T1).

[0075] The gate electrode of the operation control thin film transistor (T5) can be connected to the light emission control line (EL). The source electrode of the operation control thin film transistor (T5) can be connected to the driving voltage line (PL). The drain electrode of the operation control thin film transistor (T5) is connected to the source electrode of the driving thin film transistor (T1) and the drain electrode of the switching thin film transistor (T2).

[0076] The gate electrode of the light-emitting control thin film transistor (T6) can be connected to the light-emitting control line (EL). The source electrode of the light-emitting control thin film transistor (T6) can be connected to the drain electrode of the driving thin film transistor (T1) and the source electrode of the compensation thin film transistor (T3). The drain electrode of the light-emitting control thin film transistor (T6) can be electrically connected to the first electrode of the organic light-emitting diode (OLED). The operation control thin film transistor (T5) and the light-emitting control thin film transistor (T6) are simultaneously turned on according to the light-emitting control signal (En) received through the light-emitting control line (EL), so that the first power supply voltage (ELVDD) is delivered to the organic light-emitting diode (OLED) and a driving current flows through the organic light-emitting diode (OLED).

[0077] The gate electrode of the second initialization thin-film transistor (T7) can be connected to the scan line (SL+1). The source electrode of the second initialization thin-film transistor (T7) can be connected to the first electrode of the organic light-emitting diode (OLED). The drain electrode of the second initialization thin-film transistor (T7) can be connected to the initialization voltage line (VL). The second initialization thin-film transistor (T7) can be turned on according to the scan signal (Sn+1) received through the scan line (SL+1) to initialize the first electrode of the organic light-emitting diode (OLED).

[0078] FIG. 4 illustrates a case where the first initialization thin film transistor (T4) and the second initialization thin film transistor (T7) are connected to the previous scan line (SL-1) and the subsequent scan line (SL+1), respectively, but the present invention is not limited thereto. In one embodiment, both the first initialization thin film transistor (T4) and the second initialization thin film transistor (T7) are connected to the previous scan line (SL-1) and can be driven according to the previous scan signal (Sn-1).

[0079] Another electrode of the storage capacitor (Cst) can be connected to the driving voltage line (PL). Any one electrode of the storage capacitor (Cst) can be connected together to the gate electrode of the driving thin-film transistor (T1), the drain electrode of the compensation thin-film transistor (T3), and the source electrode of the first initialization thin-film transistor (T4).

[0080] The second electrode (e.g., cathode) of the organic light-emitting diode (OLED) can be provided with a second power supply voltage (ELVSS). The organic light-emitting diode (OLED) can emit light by receiving a driving current from a driving thin-film transistor (T1).

[0081] The pixel circuit (PC) is not limited to the number and circuit design of the thin-film transistors and storage capacitors described with reference to FIG. 4, and the number and circuit design can be varied.

[0082] FIG. 5 is a cross-sectional view schematically illustrating a display device according to one embodiment.

[0083] Referring to FIG. 5, a thin-film transistor (TFT), a storage capacitor (Cst), and an organic light-emitting diode (OLED) may be placed on a substrate (100).

[0084] The substrate (100) may include a glass material, a ceramic material, a metal material, or a material having flexible or bendable properties. In one embodiment, the substrate (100) may include a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polycarbonate, or cellulose acetate propionate.

[0085] On the substrate (100), a buffer layer (110) formed to prevent impurities from penetrating into the semiconductor layer of the thin film transistor (TFT), a gate insulating layer (130) for insulating the semiconductor layer and the gate electrode of the thin film transistor (TFT), an interlayer insulating layer (150) for insulating the source electrode, the drain electrode, and the gate electrode of the thin film transistor (TFT), and a flattening insulating layer (170) covering the thin film transistor (TFT) and having an upper surface that is approximately flat may be disposed.

[0086] An organic light-emitting diode (OLED) comprising a first electrode (210), an intermediate layer (220), and a second electrode (230) may be disposed on a planarizing insulating layer (170). The first electrode (210) may include a reflective film comprising silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), or a compound thereof. The first electrode (210) may include a reflective film comprising the aforementioned materials, and a transparent conductive film disposed above or / and below the reflective film. The transparent conductive film may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO), or aluminum zinc oxide (AZO). In one embodiment, the first electrode (210) may have a multilayer structure of sequentially stacked ITO film, Ag film, and ITO film. The first electrode (210) may be electrically connected to a thin film transistor (TFT) through a contact hole (CNT) defined in the planarizing insulating layer (170).

[0087] A first pixel defining film (180) may be disposed on the first electrode (210). The first pixel defining film (180) may include a first opening (1801) that exposes at least a portion of the first electrode (210). An edge portion of the first electrode (210) may be covered by the first pixel defining film (180). An edge portion of the first electrode (210) may be in direct contact with the first pixel defining film (180) while overlapping with the first pixel defining film (180). A central portion of the first electrode (210) may overlap with the first opening (1801) of the first pixel defining film (180) and may be exposed through the first opening (1801). In one embodiment, the size of the first opening (1801) may be smaller than the size of the first electrode (210).

[0088] In one embodiment, the first pixel defining film (180) may have a colored material. The first pixel defining film (180) may include a colored pigment, for example, a pigment having a predetermined color such as white or black. In one embodiment, the first pixel defining film (180) may have black. In one embodiment, the first pixel defining film (180) may include a polyimide (PI)-based binder and a pigment mixed with red, green, and blue. Alternatively, the first pixel defining film (180) may include a cardo-based binder resin and a mixture of lactam-based black pigment and blue pigment. Alternatively, the first pixel defining film (180) may include carbon black.

[0089] In one embodiment, the first pixel defining film (180) may include a plurality of particles. The average size of the plurality of particles included in the first pixel defining film (180) may be 200 nm or less. For example, the average size of the plurality of particles included in the first pixel defining film (180) may be 10 nm to 200 nm.

[0090] In one embodiment, the first pixel defining film (180) containing a pigment may have an optical density of 1 or more. By having the first pixel defining film (180) containing a pigment have an optical density of 1 or more, the transmittance of the first pixel defining film (180) may be reduced, and at the same time, the contrast of the display device may be improved. Alternatively, in one embodiment, the first pixel defining film (180) may have an optical density of 1.5 or more, or may have an optical density of 2 or more, and various other variations are possible.

[0091] The first pixel defining film (180) can prevent or minimize external light reflection by including a pigment. For example, the first pixel defining film (180) including a pigment can prevent or minimize the reflection of external light traveling from the outside toward the display device and can improve the contrast of the display device.

[0092] In one embodiment, a second pixel defining film (190) may be disposed on the first pixel defining film (180). The second pixel defining film (190) may include a second opening (1901) that exposes at least a portion of the first electrode (210). The second opening (1901) defined in the second pixel defining film (190) may overlap at least partially with the first opening (1801) defined in the first pixel defining film (180).

[0093] In one embodiment, the second pixel defining film (190) may include a dye. For example, the second pixel defining film (190) may include a black dye dissolved in a solvent.

[0094] The second pixel defining film (190) can prevent or minimize external light reflection by including a dye. For example, the second pixel defining film (190) including a dye can prevent or minimize the reflection of external light traveling from the outside toward the display device and can improve the contrast of the display device.

[0095] In one embodiment, the optical density of the second pixel defining film (190) containing a dye may be equal to the optical density of the first pixel defining film (180) containing a pigment. Alternatively, in one embodiment, the optical density of the second pixel defining film (190) containing a dye may be equal to the optical density of the first pixel defining film (180) containing a pigment, or may be smaller than the optical density of the first pixel defining film (180) containing a pigment. Accordingly, since the optical density of the second pixel defining film (190) containing a dye is equal to or smaller than the optical density of the first pixel defining film (180) containing a pigment, the second pixel defining film (190) containing a dye may have a transmittance equal to or higher than that of the first pixel defining film (180) containing a pigment.

[0096] In one embodiment, the second pixel defining film (190) may cover the upper surface and side of the first pixel defining film (180). Since the second pixel defining film (190) covers the upper surface and side of the first pixel defining film (180), the second pixel defining film (190) may come into direct contact with the first electrode (210). Accordingly, the width (W1) of the first opening (1801) defined in the first pixel defining film (180) may be larger than the width (W2) of the second opening (1901) defined in the second pixel defining film (190).

[0097] In one embodiment, the first pixel defining film (180) may include a pigment and a negative photosensitive material, and the second pixel defining film (190) may include a dye and a positive photosensitive material. By having the first pixel defining film (180) provided with a pigment and a negative photosensitive material, the first pixel defining film (180) may have a high optical density, and by having the second pixel defining film (190) provided with a dye and a positive photosensitive material, the occurrence of residue may be prevented or minimized.

[0098] In addition, in one embodiment, a first pixel defining film (180) containing a pigment and a second pixel defining film (190) containing a dye are provided in an overlapping structure, so that the transmittance of the portion (e.g., a non-luminous region) where the first pixel defining film (180) and the second pixel defining film (190) are arranged can be reduced, and thus the contrast of the display device can be improved.

[0099] As a comparative example of the present invention, a portion of the first pixel defining film (180) located in an area corresponding to the central part of the first electrode (210) is removed to form a first opening (1801) that exposes at least a portion of the first electrode (210). However, there is a problem in that a residue that was not completely removed remains on the first electrode (210), and this residue can cause a dark spot to occur. In particular, due to the residue remaining at the edge of the first opening (1801), a short circuit occurs between the first electrode (210) and the second electrode (230), causing a dark spot and simultaneously generating a residue.

[0100] In addition, when a photosensitive polyimide (PSPI) is placed on the first pixel defining film (180) to prevent the occurrence of the above dark spots and residues, the external light reflectance of the first electrode (210) increases due to the reduction in the area of ​​the first pixel defining film (180), thereby lowering the contrast of the display device, and there are problems such as dark spots still occurring at the edge portion of the first aperture (1801) when the optical density of the first pixel defining film (180) increases.

[0101] In addition, when at least a portion of the first pixel defining film (180) is reflowed to cover the side of the first pixel defining film (180) in order to prevent the occurrence of the above-mentioned dark spots and residues, the area dispersion of the first electrode (210), at least a portion of which is exposed by the first pixel defining film (180), increases, and there is a problem that the lifespan dispersion of the organic light-emitting diode (OLED) increases as the area dispersion of the first electrode (210) increases.

[0102] In one embodiment, a second pixel defining film (190) containing a dye is disposed on a first pixel defining film (180) containing a pigment, and the second pixel defining film (190) is provided in a structure that covers the side of the first pixel defining film (180), thereby preventing or minimizing the occurrence of dark spots and simultaneously reducing the external light reflectance of the first electrode (210), so as to improve the contrast of the display device. For example, the second pixel defining film (190) covers the residue remaining at the edge portion of the first opening (1801), thereby preventing or minimizing the occurrence of a short circuit between the first electrode (210) and the second electrode (230), so as to prevent or minimize the occurrence of dark spots and simultaneously prevent or minimize the visibility of residue at the edge portion of the organic light-emitting diode (OLED).

[0103] In addition, since the second pixel defining film (190) covers the residue remaining at the edge portion of the first opening (1801), the reflow process does not need to be performed, so the area dispersion of the first electrode (210) can be reduced, and at the same time, the surface dispersion of the organic light-emitting diode (OLED) can be reduced.

[0104] In one embodiment, the first pixel defining film (180) and the second pixel defining film (190) may include a negative photosensitive material. For example, the first pixel defining film (180) may include a pigment and a negative photosensitive material, and the second pixel defining film (190) may include a dye and a negative photosensitive material.

[0105] In one embodiment, the first pixel defining film (180) and the second pixel defining film (190) may include a positive photosensitive material. For example, the first pixel defining film (180) may include a pigment and a positive photosensitive material, and the second pixel defining film (190) may include a dye and a positive photosensitive material.

[0106] In one embodiment, the first pixel defining film (180) may include a positive photosensitive material, and the second pixel defining film (190) may include a negative photosensitive material. For example, the first pixel defining film (180) may include a pigment and a positive photosensitive material, and the second pixel defining film (190) may include a dye and a negative photosensitive material.

[0107] In one embodiment, an intermediate layer (220) may be disposed on the first electrode (210). The intermediate layer (220) may include a first functional layer (221), a light-emitting layer (222), and a second functional layer (223). In one embodiment, a light-emitting layer (222) may be disposed within a second opening (1901) defined in the second pixel defining film (190). For example, the light-emitting layer (222) may fill the second opening (1901) defined in the second pixel defining film (190), the first functional layer (221) may be disposed below the light-emitting layer (222), and the second functional layer (223) may be disposed above the light-emitting layer (222).

[0108] The light-emitting layer (222) may include an organic material. The light-emitting layer (222) may include a high-molecular-weight organic material or a low-molecular-weight organic material that emits light of a predetermined color. The light-emitting layer (222) may be formed through a deposition process using a mask.

[0109] The first functional layer (221) may be a single layer or a multilayer. For example, if the first functional layer (221) is formed from a polymer material, the first functional layer (221) may be formed from polyethylene dihydroxythiophene (PEDOT) or polyaniline (PANI) as a single-layer hole transport layer (HTL). If the first functional layer (221) is formed from a low-molecular-weight material, the first functional layer (221) may include a hole injection layer (HIL) and a hole transport layer (HTL). The first functional layer (221) may be formed, for example, by thermal evaporation.

[0110] The second functional layer (223) may be optional. For example, when the first functional layer (221) and the light-emitting layer (222) are formed from a polymer material, it may be preferable to form the second functional layer (223). The second functional layer (223) may be a single layer or a multilayer. The second functional layer (223) may include an electron transport layer (ETL) and / or an electron injection layer (EIL). The second functional layer (223) may be formed, for example, by thermal evaporation.

[0111] The second electrode (230) may be disposed on the intermediate layer (220). The second electrode (230) may be made of a conductive material having a relatively low work function. For example, the second electrode (230) may include a (semi)transparent layer comprising silver (Ag), magnesium (Mg), aluminum (Al), nickel (Ni), chromium (Cr), lithium (Li), calcium (Ca), or alloys thereof. Alternatively, the second electrode (230) may further include a layer such as ITO, IZO, ZnO, or In2O3 on the (semi)transparent layer comprising the aforementioned materials. In one embodiment, the second electrode (230) may include silver (Ag) and magnesium (Mg).

[0112] The stacked structure of the first electrode (210), the intermediate layer (220), and the second electrode (230) stacked sequentially can form a light-emitting diode, such as an organic light-emitting diode (OLED).

[0113] FIG. 6 is a cross-sectional view schematically illustrating a display device according to one embodiment. The embodiment of FIG. 6 differs from the embodiment of FIG. 5 in that a spacer (195) is further disposed on the second pixel defining film (190). In FIG. 6, the same reference numerals as in FIG. 5 refer to the same components, so a redundant description thereof is omitted.

[0114] Referring to FIG. 6, a spacer (195) may be further disposed on the second pixel defining film (190). The spacer (195) may be disposed so as not to overlap with the first opening (1801) defined in the first pixel defining film (180) and / or the second opening (1901) defined in the second pixel defining film (190). That is, the spacer (195) may overlap at least partially with the first pixel defining film (180) and / or the second pixel defining film (190).

[0115] In one embodiment, the spacer (195) may be formed by the same process as the second pixel defining film (190). For example, the second pixel defining film (190) and the spacer (195) may be formed simultaneously through a process using a halftone mask. Accordingly, the spacer (195) may contain the same material as the second pixel defining film (190). For example, the spacer (195) may contain a dye and may contain a negative photosensitive material.

[0116] By placing a spacer (195) on the first pixel defining film (180) and / or the second pixel defining film (190), damage to the organic light-emitting diode (OLED) due to masking can be prevented or minimized.

[0117] FIGS. 7 and FIGS. 8 are cross-sectional views schematically illustrating a display device according to one embodiment. The embodiment of FIGS. 7 and FIGS. 8 differs from the embodiment of FIGS. 5 and FIGS. 6, respectively, in that a thin film encapsulation layer (300) and an optical functional layer (400) are further disposed on an organic light-emitting diode (OLED). In FIGS. 7 and FIGS. 8, the same reference numerals as in FIGS. 5 and FIGS. 6 refer to the same components, so a redundant description thereof is omitted.

[0118] Referring to FIGS. 7 and 8, a thin film encapsulation layer (300) may be disposed on an organic light-emitting diode (OLED). The thin film encapsulation layer (300) may include at least one inorganic film layer and at least one organic film layer. In one embodiment, the thin film encapsulation layer (300) may include a first inorganic film layer (310), an organic film layer (320), and a second inorganic film layer (330) that are sequentially stacked.

[0119] The first inorganic film layer (310) and the second inorganic film layer (330) may each include one or more inorganic insulating materials. The inorganic insulating materials may include aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, zinc oxide, silicon oxide, silicon nitride, and / or silicon oxynitride. The first inorganic film layer (310) and the second inorganic film layer (330) may be formed through chemical vapor deposition.

[0120] The organic film layer (320) may include a polymer-based material. Polymer-based materials may include acrylic resin, epoxy resin, polyimide, and polyethylene. For example, the organic film layer (320) may include an acrylic resin, such as polymethyl methacrylate or polyacrylic acid. The organic film layer (320) may be formed by curing a monomer or by applying a polymer.

[0121] An optical functional layer (400) may be disposed on the thin film encapsulation layer (300). The optical functional layer (400) may include a color filter (410) and a black matrix (420) as components to prevent reflection of external light. A display device having an optical functional layer (400) including a color filter (410) and a black matrix (420) can significantly reduce the thickness of the display device compared to a display device including a polarizer.

[0122] In one embodiment, the color filter (410) is positioned to overlap with the first opening (1801) defined in the first pixel defining film (180) and / or the second opening (1901) defined in the second pixel defining film (190), and light emitted from the organic light-emitting diode (OLED) can pass through the thin film encapsulation layer (300) and the color filter (410). In one embodiment, the color filter (410) may be an organic pattern containing a dye or pigment.

[0123] In one embodiment, the black matrix (420) may be positioned to overlap at least partially with the first pixel defining layer (180) and / or the second pixel defining layer (190). In one embodiment, the black matrix (420) is an organic material mixed with black pigment, chromium (Cr) or chromium oxide (CrO₂). X It may include ) etc. When the black matrix (420) is formed with chromium or chromium oxide, the black matrix (420) may be a single layer or multiple layers of chromium or chromium oxide. In one embodiment, the black matrix (420) may include the same material as the first pixel defining layer (180) or the second pixel defining layer (190).

[0124] FIGS. 9 to 15 are cross-sectional views illustrating a process according to a method for manufacturing a display device according to one embodiment.

[0125] Referring to FIG. 9, a first electrode (210) can be formed on a substrate (100). In one embodiment, FIG. 9 illustrates that the first electrode (210) is formed on a planarizing insulating layer (170). Before the first electrode (210) is formed, a thin-film transistor (TFT) and a storage capacitor (Cst) can be formed on the substrate (100).

[0126] The substrate (100) may be formed from various materials such as glass, metal, or plastic materials such as PET (Polyethylene terephthalate), PEN (Polyethylene naphthalate), or polyimide. On the substrate (100), a buffer layer (110) formed to prevent impurities from penetrating into the semiconductor layer of the thin film transistor (TFT), a gate insulating layer (130) for insulating the semiconductor layer of the thin film transistor (TFT) and the gate electrode, an interlayer insulating layer (150) for insulating the source electrode, drain electrode, and gate electrode of the thin film transistor (TFT), and a flattening insulating layer (170) covering the thin film transistor (TFT) and having an upper surface that is approximately flat may be formed.

[0127] The first electrode (210) may include a reflective film comprising silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), or a compound thereof. The first electrode (210) may include a reflective film comprising the aforementioned materials, and a transparent conductive film disposed above or / and below the reflective film. The transparent conductive film may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO), or aluminum zinc oxide (AZO), etc. In one embodiment, the first electrode (210) may have a multilayer structure of sequentially stacked ITO film, Ag film, and ITO film.

[0128] Subsequently, as illustrated in FIG. 10, a first colored material layer (180M) can be formed on the first electrode (210). The first colored material layer (180M) can be coated entirely on the substrate (100). In one embodiment, the first colored material layer (180M) may include a pigment. In one embodiment, the first colored material layer (180M) may include a negative photosensitive material. Alternatively, in one embodiment, the first colored material layer (180M) may include a positive photosensitive material.

[0129] Afterward, as illustrated in FIG. 11, the first colored material layer (180M) can be exposed using a mask (1400). The mask (1400) may include a light-transmitting part (1401) and a light-blocking part (1402).

[0130] In one embodiment, when the first colored material layer (180M) is provided as a negative photosensitive material, the light-transmitting portion (1401) of the mask (1400) may not overlap with the first electrode (210) or may overlap with the edge portion of the first electrode (210), and the light-blocking portion (1402) of the mask (1400) may overlap with the central portion of the first electrode (210). Accordingly, the portion of the first colored material layer (180M) that overlaps with the central portion of the first electrode (210) may not be exposed, while the remaining portion of the first colored material layer (180M) may be exposed.

[0131] In one embodiment, when the first colored material layer (180M) is provided as a positive photosensitive material, the light-transmitting portion (1401) of the mask (1400) may overlap with the central portion of the first electrode (210), and the light-blocking portion (1402) of the mask (1400) may not overlap with the first electrode (210) or may overlap with the edge portion of the first electrode (210). In this case, the portion of the first colored material layer (180M) that overlaps with the central portion of the first electrode (210) may be exposed, and the remaining portion of the first colored material layer (180M) may not be exposed.

[0132] Afterward, the exposed first colored material layer (180M) can be developed. Through development, a first pixel defining film (180) including a first opening (1801) can be formed on the substrate (100), as shown in FIG. 12. In one embodiment, the first opening (1801) defined in the first pixel defining film (180) may have a first width (W1).

[0133] In one embodiment, the first pixel defining film (180) may have a colored material. The first pixel defining film (180) may have a colored pigment, such as a pigment of a predetermined color such as white or black. In one embodiment, the first pixel defining film (180) may have black. In one embodiment, the first pixel defining film (180) may include a polyimide (PI)-based binder and a pigment mixed with red, green, and blue. Alternatively, the first pixel defining film (180) may include a cardo-based binder resin and a mixture of lactam-based black pigment and blue pigment. Alternatively, the first pixel defining film (180) may include carbon black.

[0134] The first pixel defining film (180) is formed from the first colored material layer (180M) and may include a negative photosensitive material or a positive photosensitive material, and may prevent external light reflection by including a pigment. The first pixel defining film (180) containing a pigment may prevent the reflection of external light traveling from the outside toward the display device and may improve the contrast of the display device.

[0135] Subsequently, as illustrated in FIG. 13, a second colored material layer (190M) may be formed on the first electrode (210) and the first pixel defining film (180). The second colored material layer (190M) may be coated entirely on the substrate (100) to cover the first electrode (210) and the first pixel defining film (180). In one embodiment, the second colored material layer (190M) may include a dye. For example, the second colored material layer (190M) may include a black dye dissolved in a solvent. In one embodiment, the second colored material layer (190M) may include a positive photosensitive material. Alternatively, in one embodiment, the second colored material layer (190M) may include a negative photosensitive material.

[0136] Afterward, as illustrated in FIG. 14, the second colored material layer (190M) can be exposed using a mask (1500). The mask (1500) may include a light-transmitting part (1501) and a light-blocking part (1502).

[0137] In one embodiment, when the second colored material layer (190M) is provided as a positive photosensitive material, the light-transmitting portion (1501) of the mask (1500) may overlap with the central portion of the first electrode (210) and / or the first opening (1801) defined in the first pixel defining film (180), and the light-blocking portion (1502) of the mask (1500) may overlap at least partially with the edge portion of the first electrode (210) and / or the first pixel defining film (180). Accordingly, the portion of the second colored material layer (190M) that overlaps with the central portion of the first electrode (210) and / or the first opening (1801) defined in the first pixel defining film (180) may be exposed, and the remaining portion of the second colored material layer (190M) may not be exposed.

[0138] In one embodiment, when the second colored material layer (190M) is provided as a negative photosensitive material, the light-transmitting portion (1501) of the mask (1500) may overlap at least partially with the edge portion of the first electrode (210) and / or the first pixel defining film (180), and the light-blocking portion (1502) of the mask (1500) may overlap with the central portion of the first electrode (210) and / or the first opening (1801) defined in the first pixel defining film (180). In this case, the portion of the second colored material layer (190M) that overlaps at least partially with the edge portion of the first electrode (210) and / or the first pixel defining film (180) may be exposed, and the remaining portion of the second colored material layer (190M) may not be exposed.

[0139] Afterward, the exposed second colored material layer (190M) can be developed. Through development, a second pixel defining film (190) including a second opening (1901) can be formed on the substrate (100), as shown in FIG. 15. In one embodiment, the first opening (1801) defined in the first pixel defining film (180) and the second opening (1901) defined in the second pixel defining film (190) may overlap at least partially.

[0140] In one embodiment, a first opening (1801) defined in the first pixel defining film (180) has a first width (W1), and a second opening (1901) defined in the second pixel defining film (190) may have a second width (W2) that is smaller than the first width (W1). In one embodiment, the second pixel defining film (190) may cover the upper surface and the side surface of the first pixel defining film (180). Thus, at least a portion of the second pixel defining film (190) may be in direct contact with the first electrode (210).

[0141] In one embodiment, the second pixel defining film (190) may include a colored material. For example, the second pixel defining film (190) may include a colored dye. In one embodiment, the second pixel defining film (190) may have a black color.

[0142] The second pixel defining film (190) is formed from the second colored material layer (190M) and may include a positive photosensitive material or a negative photosensitive material, and may include a dye to prevent external light reflection. The second pixel defining film (190) containing a dye may prevent the reflection of external light traveling from the outside toward the display device and may improve the contrast of the display device.

[0143] In one embodiment, the second pixel defining film (190) containing a dye may have an optical density equal to or smaller than that of the first pixel defining film (180) containing a pigment. Since the second pixel defining film (190) containing a dye has an optical density equal to or smaller than that of the first pixel defining film (180) containing a pigment, the second pixel defining film (190) containing a dye may have a higher transmittance than the first pixel defining film (180) containing a pigment.

[0144] FIGS. 16 and 17 are cross-sectional views illustrating a process according to a method for manufacturing a display device according to one embodiment. The embodiment of FIGS. 16 and 17 differs from the embodiment of FIGS. 14 and 15 in that a spacer (195) is formed on the second pixel defining film (190). In FIGS. 16 and 17, the same reference numerals as in FIGS. 14 and 15 refer to the same components, so a redundant description thereof is omitted.

[0145] Referring to FIG. 16, after forming a second colored material layer (190M) on the first electrode (210) and the first pixel defining film (180), the second colored material layer (190M) can be exposed using a mask (1600). The mask (1600) may include a light-transmitting portion (1601), a light-blocking portion (1602), and a semi-transparent portion (1603).

[0146] In one embodiment, when the second colored material layer (190M) is provided as a positive photosensitive material, the light-transmitting portion (1601) of the mask (1600) may overlap with the central portion of the first electrode (210) and / or the first opening (1801) defined in the first pixel defining film (180), the light-blocking portion (1602) of the mask (1600) may overlap at least partially with the first pixel defining film (180), and the semi-transparent portion (1603) of the mask (1600) may overlap at least partially with the edge portion of the first electrode (210) and / or the first pixel defining film (180). Accordingly, the portion of the second colored material layer (190M) that overlaps with the central portion of the first electrode (210) and / or the first aperture (1801) defined in the first pixel defining film (180) is exposed, the portion that overlaps at least partially with the first pixel defining film (180) is not exposed, and the remaining portion of the second colored material layer (190M) may be exposed to about half of its thickness. For example, the portion that overlaps with the light-transmitting portion (1601) of the mask (1600) is exposed, the portion that overlaps with the light-blocking portion (1602) of the mask (1600) is not exposed, and the portion that overlaps with the semi-transmitting portion (1603) of the mask (1600) may be exposed to a thickness corresponding to about half of the portion that is not exposed when overlapping with the light-blocking portion (1602) of the mask (1600). That is, the portion overlapping with the semi-transparent portion (1603) of the mask (1600) can be exposed to light by only about half its thickness.

[0147] In one embodiment, when the second colored material layer (190M) is provided as a negative photosensitive material, the light-blocking portion (1602) of the mask (1600) may overlap with the central portion of the first electrode (210) and / or the first opening (1801) defined in the first pixel defining film (180), the light-transmitting portion (1601) of the mask (1600) may overlap at least partially with the first pixel defining film (180), and the semi-transparent portion (1603) of the mask (1600) may overlap at least partially with the edge portion of the first electrode (210) and / or the first pixel defining film (180). Accordingly, the portion of the second colored material layer (190M) that overlaps with the central portion of the first electrode (210) and / or the first aperture (1801) defined in the first pixel defining film (180) is not exposed, the portion that overlaps at least partially with the first pixel defining film (180) is exposed, and the remaining portion of the second colored material layer (190M) may be exposed to about half of its thickness. For example, the portion that overlaps with the light-transmitting portion (1601) of the mask (1600) is exposed, the portion that overlaps with the light-blocking portion (1602) of the mask (1600) is not exposed, and the portion that overlaps with the semi-transmitting portion (1603) of the mask (1600) may be exposed to a thickness corresponding to about half of the portion that is not exposed when overlapping with the light-blocking portion (1602) of the mask (1600). That is, the portion overlapping with the semi-transparent portion (1603) of the mask (1600) can be exposed to light by only about half its thickness.

[0148] Afterward, the exposed second colored material layer (190M) can be developed. Through development, a second pixel defining film (190) including a second aperture (1901) and a spacer (195) on the second pixel defining film (190) can be formed on the substrate (100), as shown in FIG. 17. For example, the portion overlapping with the light-transmitting portion (1601) of the mask (1600) corresponds to the second aperture (1901), the portion overlapping with the light-blocking portion (1602) of the mask (1600) corresponds to the spacer (195), and the portion overlapping with the semi-transparent portion (1603) of the mask (1600) corresponds to the second pixel defining film (190).

[0149] In one embodiment, since the second pixel defining film (190) and the spacer (195) are formed by the same process, the second pixel defining film (190) and the spacer (195) can be provided as a single unit. Additionally, the second pixel defining film (190) and the spacer (195) may include the same material.

[0150] After FIG. 15 and / or FIG. 17, an intermediate layer (220, FIG. 5) and a second electrode (230) may be formed on a first electrode (210) that is at least partially exposed through a second opening (1901) defined in a second pixel defining film (190), although not illustrated therein.

[0151] In one embodiment, the intermediate layer (220) may include a light-emitting layer (222) disposed within a second opening (1901), a first functional layer (221) formed below the light-emitting layer (222), and a second functional layer (223) formed above the light-emitting layer (222).

[0152] The first electrode (210), the intermediate layer (220), and the second electrode (230) stacked sequentially can form an organic light-emitting diode (OLED).

[0153] Subsequently, although not shown, a thin film encapsulation layer (300, FIG. 7) comprising at least one inorganic film layer and at least one organic film layer may be formed on an organic light-emitting diode (OLED), and an optical functional layer (400, FIG. 7) may be formed on the thin film encapsulation layer (300).

[0154] The optical functional layer (400) may include a color filter (410, FIG. 7) and a black matrix (420, FIG. 7).

[0155] The present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0156] 1: Display device 100: Substrate 180: First pixel definition layer 190: Second pixel definition membrane 195: Spacer 210: First electrode

Claims

Claim 1 A display device comprising: a substrate; a first electrode disposed on the substrate; a first pixel defining film disposed directly on the first electrode and having a first opening that exposes at least a portion of the first electrode and comprising a pigment; and a second pixel defining film disposed on the first pixel defining film and having a second opening that exposes at least a portion of the first electrode and comprising a dye; wherein the second pixel defining film covers the upper surface and side surface of the first pixel defining film, and the width of the first opening is greater than the width of the second opening. Claim 2 In claim 1, the first pixel defining film is a display device having an optical density of 1 or more. Claim 3 A display device according to claim 1, wherein the optical density of the first pixel defining film is equal to or greater than the optical density of the second pixel defining film. Claim 4 A display device according to claim 1, wherein the first pixel defining film comprises a plurality of particles, and the average size of the plurality of particles is 200 nm or less. Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 A display device according to claim 1, wherein the first pixel defining film comprises a negative photosensitive material and the second pixel defining film comprises a positive photosensitive material. Claim 10 A display device according to claim 1, wherein the first pixel defining film and the second pixel defining film comprise a negative photosensitive material. Claim 11 A display device according to claim 1, wherein the first pixel defining film and the second pixel defining film comprise a positive photosensitive material. Claim 12 A display device according to claim 1, wherein the first pixel defining film comprises a positive photosensitive material and the second pixel defining film comprises a negative photosensitive material. Claim 13 A display device according to claim 1, further comprising a spacer disposed on the second pixel defining film, wherein the spacer comprises the same material as the second pixel defining film. Claim 14 A display device according to claim 13, wherein the first pixel defining film and the spacer comprise different materials. Claim 15 A display device according to claim 1, further comprising an intermediate layer including a light-emitting layer that fills the second opening, and a second electrode disposed on the intermediate layer. Claim 16 A display device according to claim 15, further comprising a thin film encapsulation layer disposed on the second electrode and comprising at least one inorganic film layer and at least one organic film layer. Claim 17 A display device according to claim 16, further comprising an optical functional layer including a color filter disposed on the thin film encapsulation layer and overlapping at least partially with the first opening, and a black matrix surrounding the color filter. Claim 18 In claim 17, the black matrix is ​​a display device that overlaps at least partially with the first pixel defining film. Claim 19 In claim 17, the black matrix is ​​a display device that overlaps at least partially with the second pixel defining film. Claim 20 A method for manufacturing a display device comprising: forming a first colored material layer containing a pigment on a first electrode; exposing a portion of the first colored material layer; developing the exposed first colored material layer to form a first pixel defining film including a first opening that exposes at least a portion of the first electrode; forming a second colored material layer containing a dye on the first electrode and the first pixel defining film; exposing a portion of the second colored material layer; and developing the exposed second colored material layer to form a second pixel defining film including a second opening that exposes at least a portion of the first electrode; wherein the first pixel defining film and the second pixel defining film are in direct contact with the first electrode, the second pixel defining film covers the upper surface and side surface of the first pixel defining film, and the width of the first opening is greater than the width of the second opening. Claim 21 A method for manufacturing a display device according to claim 20, wherein, in the operation of developing the exposed second colored material layer to form the second pixel defining film, the second pixel defining film and a spacer integrally provided with the second pixel defining film are formed. Claim 22 A method for manufacturing a display device according to claim 20, wherein the first pixel defining film comprises a negative photosensitive material and the second pixel defining film comprises a positive photosensitive material. Claim 23 A method for manufacturing a display device according to claim 20, wherein the optical density of the first pixel defining film is equal to or greater than the optical density of the second pixel defining film. Claim 24 A method for manufacturing a display device according to claim 20, wherein the first opening and the second opening overlap at least partially. Claim 25 delete Claim 26 delete Claim 27 delete Claim 28 A method for manufacturing a display device according to claim 20, wherein the first pixel defining film and the second pixel defining film comprise a negative photosensitive material. Claim 29 A method for manufacturing a display device according to claim 20, wherein the first pixel defining film and the second pixel defining film comprise a positive photosensitive material. Claim 30 A method for manufacturing a display device according to claim 20, wherein the first pixel defining film comprises a positive photosensitive material and the second pixel defining film comprises a negative photosensitive material.

Images