Display device and tiled display device including the same

Abstract

A display device is provided. The display device comprises a substrate including a display area having a plurality of light-emitting regions and a light-blocking region, and a non-display area surrounding the display area; a thin-film transistor layer disposed on the substrate and comprising a plurality of thin-film transistors; a light-emitting element layer disposed on the thin-film transistor layer and comprising a plurality of light-emitting elements; a wavelength conversion layer disposed on the light-emitting element layer and converting the peak wavelength of light provided by at least some of the light-emitting elements; and a color filter layer disposed on the wavelength conversion layer, wherein the color filter layer comprises a plurality of color filters disposed in each of the plurality of light-emitting regions, a first light-blocking member disposed in the light-blocking region, and a second light-blocking member disposed in the non-display area.

Description

Technology Field

[0001] The present invention relates to a display device and a tile-type display device including the same. Background Technology

[0002] As the information society develops, the demand for display devices for displaying images is increasing in various forms. For example, display devices are being applied to a wide range of electronic devices, such as smartphones, digital cameras, laptop computers, navigation systems, and smart televisions. Display devices may be flat panel display devices, such as Liquid Crystal Display Devices, Field Emission Display Devices, and Organic Light Emitting Display Devices. Among these flat panel display devices, light-emitting display devices include light-emitting elements in which each pixel of the display panel can emit light independently, thereby enabling the display of images without a backlight unit that provides light to the display panel.

[0003] When manufacturing display devices in large sizes, the increase in the number of pixels can lead to an increase in the defect rate of light-emitting elements and a decrease in productivity or reliability. To address this, a tile-type display can realize a large screen by connecting multiple display devices that are relatively small in size. A tile-type display may include boundary areas called seams between multiple display devices due to the non-display areas or bezel areas of each of the adjacent display devices. When a single image is displayed across the entire screen, these boundary areas create a sense of discontinuity, thereby reducing the immersion of the image. The problem to be solved

[0004] The problem that the present invention aims to solve is to provide a display device capable of preventing light leakage into the outer periphery of a display device or the coupling area between a plurality of display devices, and reducing the step difference of the upper surface in a non-display area or a coupling area, and a tile-type display device including the same.

[0005] The problem that the present invention aims to solve is to provide a tile-type display device that can eliminate the sense of disconnection between multiple display devices and enhance image immersion by preventing the perception of boundary portions or non-display areas between multiple display devices.

[0006] The problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0007] A display device according to one embodiment for solving the above problem comprises a substrate including a display area having a plurality of light-emitting regions and a light-blocking region, and a non-display region surrounding the display area; a thin-film transistor layer disposed on the substrate and comprising a plurality of thin-film transistors; a light-emitting element layer disposed on the thin-film transistor layer and comprising a plurality of light-emitting elements; a wavelength conversion layer disposed on the light-emitting element layer and converting the peak wavelength of light provided by at least some of the light-emitting elements; and a color filter layer disposed on the wavelength conversion layer, wherein the color filter layer comprises a plurality of color filters disposed in each of the plurality of light-emitting regions, a first light-blocking member disposed in the light-blocking region, and a second light-blocking member disposed in the non-display region.

[0008] The height of the second light-blocking member may be greater than or equal to the height of the first light-blocking member and less than or equal to the height of the plurality of color filters.

[0009] The above non-display area includes a pattern area where the second light-blocking member is placed, and an open area excluding the pattern area, and the area ratio of the pattern area and the open area may be 1.5 to 3 to 1.

[0010] The second light-blocking member may have at least one closed-loop shape surrounding the display area.

[0011] The second light-blocking member may have at least one of a circle, an ellipse, a semicircle, or a polygonal shape.

[0012] The above second light-blocking member may include a material that blocks visible light and transmits infrared light.

[0013] The width of the second light-blocking member positioned at the outermost edge of the above-mentioned non-display area may be smaller than the width of another second light-blocking member.

[0014] The plurality of light-emitting regions include first to third light-emitting regions that emit different colors, and the wavelength conversion layer may include a first wavelength conversion unit disposed in the first light-emitting region to convert the peak wavelength of light incident from the plurality of light-emitting elements to a first peak wavelength, a second wavelength conversion unit disposed in the second light-emitting region to convert the peak wavelength of light incident from the plurality of light-emitting elements to a second peak wavelength different from the first peak wavelength, and a light transmission unit disposed in the third light-emitting region to transmit light incident from the plurality of light-emitting elements.

[0015] The plurality of color filters includes a first color filter disposed on the first wavelength conversion unit, a second color filter disposed on the second wavelength conversion unit, and a third color filter disposed on the light transmission unit, and the first light-blocking member may have a grid shape disposed on the wavelength conversion layer and surrounding the first to third color filters.

[0016] The first light-blocking member positioned at the outermost edge among the first light-blocking members can surround the side of the wavelength conversion layer.

[0017] The second light-blocking member can be disposed on the light-emitting element layer and surround the side of the wavelength conversion layer at a spaced-apart location.

[0018] A tile-type display device according to one embodiment for solving the above problem comprises a plurality of display devices including a display area having a plurality of light-emitting regions and a light-blocking region, and a coupling region disposed between the display areas, and a coupling member for coupling the plurality of display devices in the coupling region, wherein each of the plurality of display devices comprises a substrate, a thin-film transistor layer disposed on the substrate and comprising a plurality of thin-film transistors, a light-emitting element layer disposed on the thin-film transistor layer and comprising a plurality of light-emitting elements, a wavelength conversion layer disposed on the light-emitting element layer and converting the peak wavelength of light provided from at least some of the light-emitting elements, and a color filter layer disposed on the wavelength conversion layer, wherein the color filter layer comprises a plurality of color filters disposed in each of the plurality of light-emitting regions, a first light-blocking member disposed in the light-blocking region, and a second light-blocking member disposed in the coupling region.

[0019] The height of the second light-blocking member may be greater than or equal to the height of the first light-blocking member and less than or equal to the height of the plurality of color filters.

[0020] The above-mentioned combined area includes a pattern area where the second light-blocking member is disposed, and an open area excluding the pattern area, and the area ratio of the pattern area and the open area may be 1.5 to 3 to 1.

[0021] The second light-blocking member may have at least one closed-loop shape surrounding the display area.

[0022] The second light-blocking member may have at least one of a circle, an ellipse, a semicircle, or a polygonal shape.

[0023] The above second light-blocking member may include a material that blocks visible light and transmits infrared light.

[0024] The above-mentioned coupling member can combine the side of the substrate of the plurality of display devices, the side of the thin-film transistor layer, the side of the light-emitting element layer, and the side of the second light-blocking member.

[0025] Each of the above plurality of display devices may further include an encapsulation layer disposed on the color filter layer, and an anti-reflection film disposed on the encapsulation layer to prevent reflection of external light.

[0026] The above tile-type display device may further include a cover member covering the upper surface of each of the plurality of display devices and a reflection-preventing film of the coupling member.

[0027] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0028] According to the display device and the tile-type display device including the same according to the embodiments, by including a light-blocking member disposed in a non-display area or a combined area, light leakage into the outer edge of the display device or the combined area between a plurality of display devices can be prevented, and the step difference of the upper surface in the non-display area or the combined area can be reduced. Accordingly, the tile-type display device can prevent the combined area from being perceived by the user and improve the sense of disconnection between a plurality of display devices, thereby enhancing the immersion of the image.

[0029] The effects according to the embodiments are not limited to those exemplified above, and a wider variety of effects are included in this specification. Brief explanation of the drawing

[0030] FIG. 1 is a plan view showing a tile-type display device according to one embodiment. FIG. 2 is a plan view showing a display device according to one embodiment. Figure 3 is a cross-sectional view taken along line I-I' of Figure 2. Figure 4 is an enlarged view of area A1 in Figure 3. FIG. 5 is a bottom view showing a display device according to one embodiment. FIG. 6 is a cross-sectional view showing a cutting area of ​​a display device according to one embodiment. FIGS. 7 to 9 are plan views illustrating the cutting process of a display device according to one embodiment. FIGS. 10 to 12 are plan views illustrating the cutting process of a display device according to another embodiment. FIGS. 13 to 15 are plan views illustrating the cutting process of a display device according to another embodiment. FIGS. 16 to 18 are plan views illustrating the cutting process of a display device according to another embodiment. FIG. 19 is a plan view showing the combined structure of a tile-type display device according to one embodiment. FIG. 20 is a cross-sectional view taken along line II-II' of FIG. 19. Specific details for implementing the invention

[0031] The advantages 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 accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0032] When elements or layers are referred to as being "on" another element or layer, this includes cases where another layer or element is interposed directly on or in the middle of another element. Throughout the specification, the same reference numerals refer to the same components. Shapes, sizes, ratios, angles, numbers, etc., disclosed in the drawings for describing embodiments are exemplary and therefore the invention is not limited to the depicted details.

[0033] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may also be the second component within the technical scope of the present invention.

[0034] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0035] Specific embodiments will be described below with reference to the attached drawings.

[0036] FIG. 1 is a plan view showing a tile-type display device according to one embodiment.

[0037] Referring to FIG. 1, a tile-type display device (TD) may include a plurality of display devices (10). The plurality of display devices (10) may be arranged in a grid pattern, but are not limited thereto. The plurality of display devices (10) may be connected in a first direction (X-axis direction) or a second direction (Y-axis direction), and the tile-type display device (TD) may have a specific shape. For example, each of the plurality of display devices (10) may have the same size as each other, but is not limited thereto. As another example, the plurality of display devices (10) may have different sizes.

[0038] Each of the plurality of display devices (10) may have a rectangular shape including a long side and a short side. The plurality of display devices (10) may be arranged such that their long sides or short sides are connected to one another. Some of the display devices (10) may be placed at the edges of the tile-type display device (TD) to form one side of the tile-type display device (TD). Other of the display devices (10) may be placed at the corners of the tile-type display device (TD) to form two adjacent sides of the tile-type display device (TD). Still other of the display devices (10) may be placed inside the tile-type display device (TD) and surrounded by other display devices (10).

[0039] Each of the plurality of display devices (10) may include a display area (DA) and a non-display area (NDA). The display area (DA) may include a plurality of pixels to display an image. Each of the plurality of pixels may include an organic light-emitting diode (OLED) including an organic light-emitting layer, a micro light-emitting diode (Micro LED), a quantum dot light-emitting diode (QD) including a quantum dot light-emitting layer, or an inorganic light-emitting diode including an inorganic semiconductor. In the following description, the case where each of the plurality of pixels includes an inorganic light-emitting diode is described primarily, but is not limited thereto. The non-display area (NDA) may be placed around the display area (DA) to surround the display area (DA) and may not display an image.

[0040] The tile-type display device (TD) may have a planar shape overall, but is not limited thereto. The tile-type display device (TD) may have a three-dimensional shape to provide a sense of three-dimensionality to the user. For example, when the tile-type display device (TD) has a three-dimensional shape, at least some of the display devices (10) among the plurality of display devices (10) may have a curved shape. As another example, the tile-type display device (TD) may have a three-dimensional shape by each of the plurality of display devices (10) having a planar shape and being connected to each other at a predetermined angle.

[0041] A tile-type display device (TD) may include a bonding area (SM) positioned between a plurality of display areas (DA). The bonding area (SM) of the tile-type display device (TD) may be formed by connecting the non-display areas (NDA) of each adjacent display device (10). The plurality of display devices (10) may be connected to each other through a bonding member or an adhesive member positioned in the bonding area (SM). The bonding area (SM) of each of the plurality of display devices (10) may not include a pad portion or a flexible film attached to the pad portion. The distance between the display areas (DA) of each of the plurality of display devices (10) may be close enough that the bonding area (SM) between the plurality of display devices (10) is not perceived by the user. The external light reflectance of the display area (DA) of each of the plurality of display devices (10) and the external light reflectance of the bonding area (SM) between the plurality of display devices (10) may be substantially the same. Accordingly, the tile-type display device (TD) can improve the sense of disconnection between the multiple display devices (10) and enhance the immersion of the image by preventing the user from perceiving the combined area (SM) between the multiple display devices (10).

[0042] FIG. 2 is a plan view showing a display device according to one embodiment.

[0043] Referring to FIG. 2, a display device (10) may include a plurality of pixels arranged along a plurality of rows and columns in a display area (DA). Each of the plurality of pixels may include a light-emitting region (LA) defined by a pixel defining film or bank, and may emit light having a predetermined peak wavelength through the light-emitting region (LA). For example, the display area (DA) of the display device (10) may include first to third light-emitting regions (LA1, LA2, LA3). Each of the first to third light-emitting regions (LA1, LA2, LA3) may be a region where light generated from a light-emitting element of the display device (10) is emitted to the outside of the display device (10).

[0044] The first to third light-emitting regions (LA1, LA2, LA3) can emit light having a predetermined peak wavelength to the outside of the display device (10). The first light-emitting region (LA1) can emit light of a first color, the second light-emitting region (LA2) can emit light of a second color, and the third light-emitting region (LA3) can emit light of a third color. For example, the first color light may be red light having a peak wavelength in the range of 610 nm to 650 nm, the second color light may be green light having a peak wavelength in the range of 510 nm to 550 nm, and the third color light may be blue light having a peak wavelength in the range of 440 nm to 480 nm, but is not limited thereto.

[0045] The first to third light-emitting regions (LA1, LA2, LA3) may be sequentially and repeatedly arranged along the first direction (X-axis direction) of the display area (DA). For example, the area of ​​the first light-emitting region (LA1) may be larger than the area of ​​the second light-emitting region (LA2), and the area of ​​the second light-emitting region (LA2) may be larger than the area of ​​the third light-emitting region (LA3). As another example, the area of ​​the first light-emitting region (LA1), the area of ​​the second light-emitting region (LA2), and the area of ​​the third light-emitting region (LA3) may be substantially the same.

[0046] The display area (DA) of the display device (10) may include a light-blocking area (BA) surrounding a plurality of light-emitting areas (LA). The light-blocking area (BA) can prevent the mixing of light emitted from the first to third light-emitting areas (LA1, LA2, LA3).

[0047] The non-display area (NDA) of the display device (10) may include a second light-blocking member (BK2) surrounding the display area (DA). The second light-blocking member (BK2) may have at least one closed-loop shape, but is not limited thereto. If the non-display area (NDA) includes a plurality of second light-blocking members (BK2), the plurality of second light-blocking members (BK2) may be spaced apart by a predetermined distance. For example, the width of the second light-blocking member (BK2) placed at the outermost edge of the non-display area (NDA) may be smaller than the width of another second light-blocking member (BK2), but is not limited thereto. As another example, the width of the second light-blocking member (BK2) placed at the outermost edge of the non-display area (NDA) may be substantially the same as the width of another second light-blocking member (BK2). The second light-blocking member (BK2) may block the transmission of light. Therefore, the second light-blocking member (BK2) can prevent light from leaking out of the outer edge of the display device (10).

[0048] Figure 3 is a cross-sectional view taken along line I-I' of Figure 2, and Figure 4 is an enlarged view of area A1 of Figure 3.

[0049] Referring to FIGS. 3 and 4, the display area (DA) of the display device (10) may include first to third light-emitting areas (LA1, LA2, LA3). Each of the first to third light-emitting areas (LA1, LA2, LA3) may be an area where light generated from a light-emitting diode (ED) of the display device (10) is emitted to the outside of the display device (10).

[0050] The display device (10) may include a substrate (SUB), a display layer (DPL), an encapsulation layer (TFE), an anti-reflective film (ARF), a first pad portion (PD1), a lead line (LDL), a second pad portion (PD2), a flexible film (FPCB), and a data driving portion (DIC).

[0051] The substrate (SUB) may be a base substrate or a base member. The substrate (SUB) may support a display device (10). The substrate (SUB) may include a display area (DA) composed of first to third light-emitting regions (LA1, LA2, LA3) and a light-blocking region (BA), and a non-display area (NDA) surrounding the display area (DA). For example, the substrate (SUB) may include a glass material, but is not limited thereto. As another example, the substrate (SUB) may include a polymer resin such as polyimide (PI). The substrate (SUB) may include a first contact hole (CNT1) into which a first pad portion (PD1) is inserted.

[0052] A display layer (DPL) may be disposed on a substrate (SUB). The display layer (DPL) may include a thin-film transistor layer (TFTL), a light-emitting element layer (EML), a wavelength conversion layer (WLCL), and a color filter layer (CFL). The thin-film transistor layer (TFTL) may include a metal layer (BML), a first connection wiring (CWL1), a buffer layer (BF), a thin-film transistor (TFT), a gate insulating film (GI), an interlayer insulating film (ILD), first and second connection electrodes (CNE1, CNE2), a second connection wiring (CWL2), a first protection layer (PAS1), and a first planarization layer (OC1).

[0053] A metal layer (BML) can be disposed on a substrate (SUB). The metal layer (BML) can overlap with the thin-film transistor (TFT) in the thickness direction (Z-axis direction) to block external light incident on the thin-film transistor (TFT). For example, the metal layer (BML) can be formed as a single layer or a multilayer composed of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

[0054] The first connection wire (CWL1) may be arranged on the substrate (SUB) spaced apart from the metal layer (BML). The first connection wire (CWL1) may be formed of the same material in the same layer as the metal layer (BML). One end of the first connection wire (CWL1) may be connected to the first pad portion (PD1), and the other end of the first connection wire (CWL1) may be connected to the second connection wire (CWL2). The first connection wire (CWL1) may supply an electrical signal received from the first pad portion (PD1) to the thin film transistor layer (TFTL) through the second connection wire (CWL2).

[0055] The buffer layer (BF) may cover the metal layer (BML), the first connection wire (CWL1), and the substrate (SUB). The buffer layer (BF) may include a second contact hole (CNT2) into which the second connection wire (CWL2) is inserted. The buffer layer (BF) may include an inorganic material capable of preventing the penetration of air or moisture. For example, the buffer layer (BF) may include a plurality of alternately stacked inorganic films.

[0056] A thin-film transistor (TFT) can be placed on a buffer layer (BF) and can constitute a pixel circuit for each of a plurality of pixels. For example, the thin-film transistor (TFT) may be a driving transistor or a switching transistor of a pixel circuit. The thin-film transistor (TFT) may include a semiconductor region (ACT), a gate electrode (GE), a drain electrode (DE), and a source electrode (SE).

[0057] A semiconductor region (ACT), a drain electrode (DE), and a source electrode (SE) may be disposed on a buffer layer (BF). The semiconductor region (ACT) may overlap with the gate electrode (GE) in the thickness direction and may be insulated from the gate electrode (GE) by a gate insulating film (GI). The drain electrode (DE) and the source electrode (SE) may be formed by making the material of the semiconductor region (ACT) conductive.

[0058] The gate electrode (GE) can be placed on the gate insulating film (GI). The gate electrode (GE) can overlap with the semiconductor region (ACT) with the gate insulating film (GI) in between.

[0059] A gate insulating film (GI) may be disposed on a semiconductor region (ACT), a drain electrode (DE), and a source electrode (SE). For example, the gate insulating film (GI) may cover the semiconductor region (ACT), the drain electrode (DE), the source electrode (SE), and a buffer layer (BF), and may insulate the semiconductor region (ACT) from the gate electrode (GE). The gate insulating film (GI) may include a second contact hole (CNT2) into which a second connection wire (CWL2) is inserted. The gate insulating film (GI) may include a contact hole through which each of the first and second connection electrodes (CNE1, CNE2) passes.

[0060] An interlayer insulating film (ILD) may be disposed on a gate electrode (GE). The interlayer insulating film (ILD) may include a first contact hole (CNT1) into which a second connection wire (CWL2) is inserted. Thus, the first contact hole (CNT1) may penetrate the interlayer insulating film (ILD), the gate insulating film (GI), and the buffer layer (BF). The interlayer insulating film (ILD) may include a contact hole through which each of the first and second connection electrodes (CNE1, CNE2) penetrates.

[0061] The first and second connecting electrodes (CNE1, CNE2) may be spaced apart from each other on the interlayer insulating film (ILD). The first connecting electrode (CNE1) may connect a data line or power line to the drain electrode (DE) of the thin-film transistor (TFT). The first connecting electrode (CNE1) may be contacted to the drain electrode (DE) through a contact hole provided in the interlayer insulating film (ILD) and the gate insulating film (GI).

[0062] The second connecting electrode (CNE2) can connect the source electrode (SE) of the thin-film transistor (TFT) and the first electrode (RME1). The second connecting electrode (CNE2) can be contacted to the source electrode (SE) through contact holes provided in the interlayer insulating film (ILD) and the gate insulating film (GI).

[0063] The second connection wiring (CWL2) may be spaced apart from the first and second connection electrodes (CNE1, CNE2) on the interlayer insulating film (ILD). The second connection wiring (CWL2) may be made of the same material in the same layer as the first and second connection electrodes (CNE1, CNE2). The second connection wiring (CWL2) may be inserted into the second contact hole (CNT2) and connected to the first connection wiring (CWL1) disposed on the substrate (SUB).

[0064] For example, the second connection wire (CWL2) can be connected to a data line to supply a data voltage to a thin-film transistor (TFT). As another example, the second connection wire (CLW2) can be connected to a power line to supply a power voltage to a thin-film transistor (TFT).

[0065] The first protective layer (PAS1) can cover the first and second connecting electrodes (CNE1, CNE2), the second connecting wire (CWL2), and the interlayer insulating film (ILD). The first protective layer (PAS1) can protect the thin-film transistor (TFT). The first protective layer (PAS1) may include a contact hole through which the first electrode (RME1) passes.

[0066] A first planarization layer (OC1) is provided on a first protection layer (PAS1) to planarize the top of a thin-film transistor layer (TFTL). For example, the first planarization layer (OC1) may include a contact hole through which a first electrode (RME1) passes. Here, the contact hole of the first planarization layer (OC1) may be connected to the contact hole of the first protection layer (PAS1). The first planarization layer (OC1) may include an organic material.

[0067] The light-emitting element layer (EML) may include a first electrode (RME1), a second electrode (RME2), a light-emitting element (ED), a first bank (BNK1), a second bank (BNK2), a second protective layer (PAS2), and a second planarization layer (OC2).

[0068] The first electrode (RME1) may be disposed on the first planarization layer (OC1). For example, the first electrode (RME1) may be disposed on the first bank (BNK1) provided on the first planarization layer (OC1). The first electrode (RME1) may be disposed to overlap with one of the first to third light-emitting regions (LA1, LA2, LA3) defined by the second bank (BNK2). The first electrode (RME1) may be connected to the source electrode (SE) of the thin-film transistor (TFT) through the second connection electrode (CNE2). The first electrode (RME1) may be the anode electrode of the light-emitting device (ED), but is not limited thereto.

[0069] The second electrode (RME2) may be spaced apart from the first electrode (RME1) on the first planarization layer (OC1). For example, the second electrode (RME2) may be placed on the first bank (BNK1) placed on the first planarization layer (OC1). The second electrode (RME2) may be placed to overlap with one of the first to third light-emitting regions (LA1, LA2, LA3) defined by the second bank (BNK2). For example, the second electrode (RME2) may receive a low-potential voltage supplied to the entire pixel from a low-potential line. The second electrode (RME2) may be the cathode electrode of the light-emitting element (ED), but is not limited thereto.

[0070] A light-emitting diode (ED) may be disposed between a first electrode (RME1) and a second electrode (RME2) on a first planarization layer (OC1). One end of the light-emitting diode (ED) may be electrically connected to the first electrode (RME1), and the other end of the light-emitting diode (ED) may be electrically connected to the second electrode (RME2). The light-emitting diode (ED) may have a size in the micrometer or nanometer range and may be an inorganic light-emitting diode containing inorganic materials. The inorganic light-emitting diode may be aligned between the two electrodes according to an electric field formed in a specific direction between the two electrodes facing each other.

[0071] For example, a plurality of light-emitting diodes (EDs) may include an active layer having the same material and emit light of the same wavelength or light of the same color. The light emitted from each of the first to third light-emitting regions (LA1, LA2, LA3) may have the same color. For example, a plurality of light-emitting diodes (EDs) may emit light of the third color or blue light having a peak wavelength in the range of 440 nm to 480 nm. Accordingly, the light-emitting element layer (EML) may emit light of the third color or blue light.

[0072] The second bank (BNK2) may be placed in the light-blocking region (BA) on the first planarization layer (OC1). The second bank (BNK2) may define the first to third light-emitting regions (LA1, LA2, LA3). For example, the second bank (BNK2) may surround each of the first to third light-emitting regions (LA1, LA2, LA3), but is not limited thereto. The second bank (BNK2) may separate and insulate the first electrode (RME1) or the second electrode (RME2) of each of the plurality of light-emitting elements (ED).

[0073] The second protective layer (PAS2) may be disposed on a plurality of light-emitting elements (ED) and a second bank (BNK2). The second protective layer (PAS2) may cover the plurality of light-emitting elements (ED) and protect the plurality of light-emitting elements (ED). The second protective layer (PAS2) may prevent damage to the plurality of light-emitting elements (ED) by preventing the penetration of impurities, such as moisture or air, from the outside.

[0074] The second planarization layer (OC2) is provided on the second protective layer (PAS2) to planarize the top of the light-emitting element layer (EML). For example, the second planarization layer (OC2) may include an organic material.

[0075] The wavelength conversion layer (WLCL) may include a first capping layer (CAP1), a third bank (BNK3), a first wavelength conversion unit (WLC1), a second wavelength conversion unit (WLC2), an optical transmission unit (LTU), a second capping layer (CAP2), and a third planarization layer (OC3).

[0076] The first capping layer (CAP1) may be disposed on the second planarization layer (OC2) of the light-emitting element layer (EML). The first capping layer (CAP1) may seal the lower surface of the first and second wavelength conversion sections (WLC1, WLC2) and the light transmission section (LTU). For example, the first capping layer (CAP1) may include an inorganic material.

[0077] The third bank (BNK3) may be placed in the light-blocking region (BA) on the first capping layer (CAP1). The third bank (BNK3) may overlap with the second bank (BNK2) in the thickness direction. The third bank (BNK3) may surround the first and second wavelength conversion sections (WLC1, WLC2) and the light transmission section (LTU) on a plane. The third bank (BNK3) may block the transmission of light. The third bank (BNK3) can improve the color reproduction rate of the display device (10) by preventing light from encroaching and mixing between the first to third light-emitting regions (LA1, LA2, LA3). The third bank (BNK3) may have a grid shape that surrounds the first to third light-emitting regions (LA1, LA2, LA3) on a plane.

[0078] The first wavelength conversion unit (WLC1) may be disposed in a first light-emitting region (LA1) on a first capping layer (CAP1). The first wavelength conversion unit (WLC1) may be surrounded by a third bank (BNK3). The first wavelength conversion unit (WLC1) may include a first base resin (BS1), a first scatterer (SCT1), and a first wavelength shifter (WLS1).

[0079] The first base resin (BS1) may include a material with a relatively high light transmittance. The first base resin (BS1) may be made of a transparent organic material. For example, the first base resin (BS1) may include at least one of organic materials such as an epoxy resin, an acrylic resin, a cardo resin, and an imide resin.

[0080] The first scatterer (SCT1) may have a refractive index different from that of the first base resin (BS1) and may form an optical interface with the first base resin (BS1). For example, the first scatterer (SCT1) may include a light-scattering material or light-scattering particles that scatter at least a portion of the transmitted light. For example, the first scatterer (SCT1) may include metal oxides such as titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), or tin oxide (SnO2), or may include organic particles such as acrylic resin or urethane resin. The first scatterer (SCT1) may scatter light in random directions regardless of the incident direction of the incident light without substantially changing the peak wavelength of the incident light.

[0081] The first wavelength shifter (WLS1) can convert or shift the peak wavelength of incident light to the first peak wavelength. For example, the first wavelength shifter (WLS1) can convert and emit blue light provided by the display device (10) into red light having a single peak wavelength in the range of 610 nm to 650 nm. The first wavelength shifter (WLS1) may be a quantum dot, a quantum rod, or a phosphor. A quantum dot may be a particulate material that emits a specific color as electrons transition from the conduction band to the valence band.

[0082] A portion of the blue light provided by the light-emitting element layer (EML) may pass through the first wavelength conversion unit (WLC1) without being converted into red light by the first wavelength shifter (WLS1). Among the blue light provided by the light-emitting element layer (EML), the light incident on the first color filter (CF1) without being converted by the first wavelength conversion unit (WLC1) may be blocked by the first color filter (CF1). Furthermore, among the blue light provided by the light-emitting element layer (EML), the red light converted by the first wavelength conversion unit (WLC1) may pass through the first color filter (CF1) and be emitted to the outside. Therefore, the first light-emitting region (LA1) may emit red light.

[0083] The second wavelength converter (WLC2) may be disposed in the second light-emitting region (LA2) on the first capping layer (CAP1). The second wavelength converter (WLC2) may be surrounded by the third bank (BNK3). The second wavelength converter (WLC2) may include a second base resin (BS2), a second scatterer (SCT2), and a second wavelength shifter (WLS2).

[0084] The second base resin (BS2) may include a material with relatively high light transmittance. The second base resin (BS2) may be made of a transparent organic material. For example, the second base resin (BS2) may be made of the same material as the first base resin (BS1) or may be made of the material exemplified in the first base resin (BS1).

[0085] The second scatterer (SCT2) may have a refractive index different from that of the second base resin (BS2) and may form an optical interface with the second base resin (BS2). For example, the second scatterer (SCT2) may include a light-scattering material or light-scattering particles that scatter at least a portion of the transmitted light. For example, the second scatterer (SCT2) may be made of the same material as the first scatterer (SCT1) or may be made of the material exemplified in the first scatterer (SCT1).

[0086] The second wavelength shifter (WLS2) can convert or shift the peak wavelength of incident light to a second peak wavelength different from the first peak wavelength of the first wavelength shifter (WLS1). For example, the second wavelength shifter (WLS2) can convert and emit blue light provided by the display device (10) into green light having a single peak wavelength in the range of 510 nm to 550 nm. The second wavelength shifter (WLS2) may be a quantum dot, a quantum rod, or a phosphor. The second wavelength shifter (WLS2) may include a material of the same nature as the material exemplified in the first wavelength shifter (WLS1). The wavelength conversion range of the second wavelength shifter (WLS2) may be made of a quantum dot, a quantum rod, or a phosphor such that it is different from the wavelength conversion range of the first wavelength shifter (WLS1).

[0087] The light-transmitting unit (LTU) may be placed in a third light-emitting region (LA3) on the first capping layer (CAP1). The light-transmitting unit (LTU) may be surrounded by a third bank (BNK3). The light-transmitting unit (LTU) may transmit while maintaining the peak wavelength of the incident light. The light-transmitting unit (LTU) may include a third base resin (BS3) and a third scatterer (SCT3).

[0088] The third base resin (BS3) may include a material with relatively high light transmittance. The third base resin (BS3) may be made of a transparent organic material. For example, the third base resin (BS3) may be made of the same material as the first or second base resin (BS1, BS2), or may be made of the material exemplified in the first base resin (BS1).

[0089] The third scatterer (SCT3) may have a refractive index different from that of the third base resin (BS3) and may form an optical interface with the third base resin (BS3). For example, the third scatterer (SCT3) may include a light-scattering material or light-scattering particles that scatter at least a portion of the transmitted light. For example, the third scatterer (SCT3) may be made of the same material as the first or second scatterer (SCT1, SCT2) or may be made of the material exemplified in the first scatterer (SCT1).

[0090] Since the wavelength conversion layer (WLCL) is placed directly on the second planarization layer (OC2) of the light-emitting element layer (EML), the display device (10) may not require a separate substrate for the first and second wavelength conversion sections (WLC1, WLC2) and the light transmission section (LTU). Accordingly, the first and second wavelength conversion sections (WLC1, WLC2) and the light transmission section (LTU) can be easily aligned with each of the first to third light-emitting regions (LA1, LA2, LA3), and the thickness of the display device (10) can be relatively reduced.

[0091] The second capping layer (CAP2) may be disposed on the first and second wavelength conversion units (WLC1, WLC2), the light transmission unit (LTU), and the third bank (BNK3) in the display area (DA). The second capping layer (CAP2) may cover the outermost side of the third bank (BNK3) in the display area (DA) and may be disposed on the first capping layer (CAP1) in the non-display area (NDA). For example, the second capping layer (CAP2) may seal the first and second wavelength conversion units (WLC1, WLC2) and the light transmission unit (LTU) to prevent damage or contamination of the first and second wavelength conversion units (WLC1, WLC2) and the light transmission unit (LTU). For example, the second capping layer (CAP2) may include an inorganic material.

[0092] The third flattening layer (OC3) is disposed on the second capping layer (CAP2) in the display area (DA) to flatten the top of the first and second wavelength conversion sections (WLC1, WLC2) and the light transmission section (LTU). For example, the third flattening layer (OC3) may include an organic material.

[0093] The color filter layer (CFL) may include a first light-blocking member (BK1), a second light-blocking member (BK2), first to third color filters (CF1, CF2, CF3), and a third protective layer (PAS3).

[0094] The first light-blocking member (BK1) may be placed in the light-blocking region (BA) on the third flattening layer (OC3) of the wavelength conversion layer (WLCL). The first light-blocking member (BK1) may overlap with the third bank (BNK3) or the second bank (BNK2) in the thickness direction. The first light-blocking member (BK1) may cover the side of the third flattening layer (OC3) at the outer edge of the display region (DA). The first light-blocking member (BK1) placed at the outermost edge among the first light-blocking members (BK1) may surround the side of the wavelength conversion layer (WLCL). The first light-blocking member (BK1) may block the transmission of light. The first light-blocking member (BK1) may improve the color reproduction rate of the display device (10) by preventing light from intruding and mixing between the first to third light-emitting regions (LA1, LA2, LA3). The first light-blocking member (BK1) may have a grid shape that surrounds the first to third light-emitting regions (LA1, LA2, LA3) on a plane.

[0095] For example, the first light-blocking member (BK1) may include an organic black pigment, but is not limited thereto. The organic black pigment may include at least one of lactam black, perylene black, and aniline black.

[0096] The second light-blocking member (BK2) may be disposed on the second capping layer (CAP2) in the non-display area (NDA). The second light-blocking member (BK2) may surround the display area (DA) in a planar plane. The second light-blocking member (BK2) may have at least one closed-loop shape in a planar plane, but is not limited thereto. The second light-blocking member (BK2) may have a partition shape in a cross-section, but is not limited thereto. If the non-display area (NDA) includes a plurality of second light-blocking members (BK2), the plurality of second light-blocking members (BK2) may be spaced apart by a predetermined distance. For example, the second light-blocking member (BK2) disposed at the outermost edge of the non-display area (NDA) may be cut by a cutting process. The second light-blocking member (BK2) can block the transmission of light. Therefore, the second light-blocking member (BK2) can prevent light from leaking out of the outer edge of the display device (10).

[0097] The second light-blocking member (BK2) may be formed from the same material in the same process as the first light-blocking member (BK1), but is not limited thereto. For example, the second light-blocking member (BK2) may include an organic black pigment, but is not limited thereto. The organic black pigment may include at least one of lactam black, perylene black, and aniline black.

[0098] In FIG. 4, the height (H2) of the second light-blocking member (BK2) may be greater than or equal to the height (H1) of the first light-blocking member (BK1) and less than or equal to the height (H3) of the first color filter (CF1) (H1 ≤ H2 ≤ H3). Here, the height (H3) of the first color filter (CF1) may correspond to the length from the lower surface of the second light-blocking member (BK2) to the upper surface of the first color filter (CF1). The height (H3) of the first color filter (CF1) may be substantially the same as the height of the second and third color filters (CF2, CF3). As the height (H2) of the second light-blocking member (BK2) increases, the distance between the second light-blocking member (BK2) and the anti-reflection film (ARF) may decrease. As the height (H2) of the second light-blocking member (BK2) is closer to the height (H3) of the first color filter (CF1), the height difference of the anti-reflection film (ARF) in the non-display area (NDA) can be reduced. Accordingly, by including the second light-blocking member (BK2), the display device (10) can prevent light from leaking out of the outer edge of the display device (10) and can reduce the height difference of the anti-reflection film (ARF) at the outer edge of the display device (10).

[0099] The second light-blocking member (BK2) can block visible light and transmit infrared light. For example, the second light-blocking member (BK2) can be cut in the thickness direction (Z-axis direction) by a cutting process using an infrared laser during the manufacturing process of the display device (10). By transmitting infrared light, the second light-blocking member (BK2) can minimize the area where heat from the laser is transferred when an infrared laser is irradiated and minimize the area of ​​damage caused by the laser. The higher the infrared transmittance of the second light-blocking member (BK2), the more the area of ​​damage caused by the laser can be reduced. Therefore, by including the second light-blocking member (BK2) that blocks visible light and transmits infrared light, the display device (10) can minimize the area of ​​damage to the second light-blocking member (BK2) during the laser cutting process, thereby reducing the tolerance of the cutting process and minimizing the area of ​​the non-display area (NDA).

[0100] A first color filter (CF1) may be placed in a first light-emitting region (LA1) on a third planarization layer (OC3). The first color filter (CF1) may be surrounded by a first light-blocking member (BK1). The first color filter (CF1) may overlap with the first wavelength conversion unit (WLC1) in the thickness direction. The first color filter (CF1) may selectively transmit light of a first color (e.g., red light) and block or absorb light of a second color (e.g., green light) and light of a third color (e.g., blue light). For example, the first color filter (CF1) may be a red color filter and may include a red colorant.

[0101] The second color filter (CF2) may be placed in the second light-emitting region (LA2) on the third planarization layer (OC3). The second color filter (CF2) may be surrounded by the first light-blocking member (BK1). The second color filter (CF2) may overlap with the second wavelength conversion unit (WLC2) in the thickness direction. The second color filter (CF2) may selectively transmit light of the second color (e.g., green light) and block or absorb light of the first color (e.g., red light) and light of the third color (e.g., blue light). For example, the second color filter (CF2) may be a green color filter and may include a green colorant.

[0102] A third color filter (CF3) may be placed in a third light-emitting region (LA3) on a third planarization layer (OC3). The third color filter (CF3) may be surrounded by a first light-blocking member (BK1). The third color filter (CF3) may overlap with the light-transmitting portion (LTU) in the thickness direction. The third color filter (CF3) may selectively transmit light of a third color (e.g., blue light) and block or absorb light of a first color (e.g., red light) and light of a second color (e.g., green light). For example, the third color filter (CF3) may be a blue color filter and may include a blue colorant.

[0103] The first to third color filters (CF1, CF2, CF3) can absorb a portion of the light entering from outside the display device (10) to reduce reflected light caused by external light. Accordingly, the first to third color filters (CF1, CF2, CF3) can prevent color distortion caused by external light reflection.

[0104] Since the first to third color filters (CF1, CF2, CF3) are placed directly on the third planarization layer (OC3) of the wavelength conversion layer (WLCL), the display device (10) may not require a separate substrate for the first to third color filters (CF1, CF2, CF3). Accordingly, the thickness of the display device (10) may be relatively reduced.

[0105] The third protective layer (PAS3) can cover the first light-blocking member (BK1) and the first to third color filters (CF1, CF2, CF3) in the display area (DA), and can cover the second light-blocking member (BK2) and the second capping layer (CAP2) in the non-display area (NDA). The third protective layer (PAS3) can protect the first to third color filters (CF1, CF2, CF3).

[0106] The encapsulation layer (TFE) can be placed on the third protective layer (PAS3) of the color filter layer (CFL). The encapsulation layer (TFE) can flatten the upper surface of the color filter layer (CFL). For example, the encapsulation layer (TFE) may include at least one inorganic film to prevent air or moisture from penetrating. Additionally, the encapsulation layer (TFE) may include at least one organic film to protect the display device (10) from foreign substances such as dust.

[0107] An anti-reflective film (ARF) may be placed on the encapsulation layer (TFE). By preventing the reflection of external light, the anti-reflective film (ARF) can reduce the degradation of visibility caused by the reflection of external light. The anti-reflective film (ARF) can protect the upper surface of the display device (10). The anti-reflective film (ARF) may be omitted. As another example, the anti-reflective film (ARF) may be replaced with a polarizing film.

[0108] The first pad portion (PD1) may be disposed on the lower surface of the substrate (SUB). The first pad portion (PD1) may be inserted into a first contact hole (CNT1) penetrating the substrate (SUB) and connected to a first connection wiring (CWL1). The first pad portion (PD1) may supply an electrical signal received from the flexible film (FPCB) to the first connection wiring (CWL1) through the second pad portion (PD2).

[0109] The second pad portion (PD2) may be disposed on the lower surface of the substrate (SUB) and may be spaced apart from the first pad portion (PD1). The second pad portion (PD2) may be connected to the first pad portion (PD1) through a lead line (LDL). The second pad portion (PD2) may receive various voltages or signals from the flexible film (FPCB) and may supply the corresponding voltages or signals to the first pad portion (PD1), the first connection wiring (CWL1), and the second connection wiring (CWL2).

[0110] The connection film (ACF) can attach the flexible film (FPCB) to the second pad portion (PD2). One side of the connection film (ACF) may be attached to the second pad portion (PD2), and the other side of the connection film (ACF) may be attached to the flexible film (FPCB). For example, the connection film (ACF) may cover the entire second pad portion (PD2), but is not limited thereto.

[0111] The connection film (ACF) may include an anisotropic conductive film. When the connection film (ACF) includes an anisotropic conductive film, the connection film (ACF) may have conductivity in the area where the contact pad of the second pad portion (PD2) and the flexible film (FPCB) come into contact, and may electrically connect the flexible film (FPCB) to the second pad portion (PD2).

[0112] A flexible film (FPCB) can be placed on the lower surface of a substrate (SUB). One side of the flexible film (FPCB) can be connected to a second pad portion (PD2), and the other side of the flexible film (FPCB) can be connected to a source circuit board (not shown) on the lower surface of the substrate (SUB). The flexible film (FPCB) can transmit a signal from a data driver (DIC) to a display device (10). For example, the data driver (DIC) may be an integrated circuit (IC). The data driver (DIC) can convert digital video data into an analog data voltage based on a data control signal from a timing control portion and supply it to a data line of a display area (DA) through the flexible film (FPCB).

[0113] FIG. 5 is a bottom view showing a display device according to one embodiment.

[0114] Referring to FIG. 5, the first pad portion (PD1) may be placed on the lower surface of the substrate (SUB). The first pad portion (PD1) may be inserted into the first contact hole (CNT1) and connected to the first connection wiring (CWL1). The first pad portion (PD1) may be placed between the first to third light-emitting regions (LA1, LA2, LA3), but is not limited thereto. The first pad portion (PD1) may supply an electrical signal received from the flexible film (FPCB) to the first connection wiring (CWL1) through the second pad portion (PD2).

[0115] The second pad portion (PD2) may be placed on the lower surface of the substrate (SUB) and may be spaced apart from the first pad portion (PD1). The second pad portion (PD2) may be connected to the first pad portion (PD1) through a lead line (LDL). The second pad portion (PD2) may receive various voltages or signals from the flexible film (FPCB) and may supply the corresponding voltages or signals to the first connection wiring (CWL1) through the first pad portion (PD1).

[0116] A flexible film (FPCB) can be placed on the lower surface of a substrate (SUB). One side of the flexible film (FPCB) can be connected to a second pad portion (PD2), and the other side of the flexible film (FPCB) can be connected to a source circuit board (not shown) on the lower surface of the substrate (SUB). The flexible film (FPCB) can transmit a signal from a data driver (DIC) to a display device (10).

[0117] FIG. 6 is a cross-sectional view showing a cutting area of ​​a display device according to one embodiment. FIG. 7 to 9 are plan views showing a cutting process of a display device according to one embodiment.

[0118] Referring to FIGS. 6 through 9, a display layer (DPL) can be laminated on a substrate (SUB). A thin film transistor layer (TFTL), a light-emitting element layer (EML), a wavelength conversion layer (WLCL), and a color filter layer (CFL) can be laminated sequentially on the substrate (SUB). An encapsulation layer (TFE) can cover the upper surface of the color filter layer (CFL), and an anti-reflective film (ARF) can be attached to the encapsulation layer (TFE).

[0119] The height of the second light-blocking member (BK2) may be greater than the height of the first light-blocking member (BK1) and less than the height of the first color filter (CF1). The closer the height of the second light-blocking member (BK2) is to the height of the first color filter (CF1), the smaller the size of the gap may be. The gap may be formed between the outermost anti-reflection film (ARF) and the encapsulation layer (TFE) of the display device (10). If the gap exists, a step difference may occur in the anti-reflection film (ARF). Therefore, by forming a cutting line using an infrared laser inside the gap, the gap between the anti-reflection film (ARF) and the encapsulation layer (TFE) can be eliminated. By eliminating the gap, the display device (10) can prevent foreign substances or moisture from penetrating through the gap.

[0120] In FIG. 6, the non-display area (NDA) can be cut in a cutting process using an infrared laser. The infrared laser can cut the anti-reflective film (ARF), the encapsulation layer (TFE), the third protective layer (PAS3), the second light-blocking member (BK2), the second capping layer (CAP2), the first capping layer (CAP1), the light-emitting element layer (EML), the thin-film transistor layer (TFTL), and the substrate (SUB). By transmitting infrared rays through the second light-blocking member (BK2), the area where heat from the laser is transferred and the area of ​​damage caused by the laser can be minimized. The higher the infrared transmittance of the second light-blocking member (BK2), the more the area of ​​damage caused by the laser can be reduced.

[0121] In FIG. 7, a plurality of second light-blocking members (BK2) may be extended in a second direction (Y-axis direction) and may be spaced apart from each other in a first direction (X-axis direction). The second light-blocking members (BK2) may have a closed-loop shape, but are not limited thereto. The second light-blocking members (BK2) can block the transmission of light. Thus, the second light-blocking members (BK2) can prevent light from leaking out of the outer edge of the display device (10).

[0122] When performing a cutting process using an infrared laser along the second direction (Y-axis direction), the cut surface may be damaged by the infrared laser and may have a certain error. Therefore, the cut surface of the non-displayed area (NDA) may have a rough surface or an irregular plane.

[0123] In FIG. 8, the cut surface of the display device (10) can be polished through a polishing process. Protruding parts of the cut surface can be removed by the polishing process, and the sides of the display device (10) can be flattened. Through the polishing process, the display device (10) can minimize the laser-damaged area and reduce the size of the non-display area (NDA).

[0124] In FIG. 9, by performing a polishing process on the cut surface of the display device (10), the width of the second light-blocking member (BK2) placed at the outermost edge of the non-display area (NDA) may be smaller than the width of the other second light-blocking member (BK2).

[0125] The non-display area (NDA) may include a pattern area (BMA) and an open area (OPA). The pattern area (BMA) may be an area within the non-display area (NDA) where the second light-blocking member (BK2) is placed, and the open area (OPA) may be an area within the non-display area (NDA) excluding the pattern area (BMA). For example, the area ratio of the pattern area (BMA) and the open area (OPA) may be 1.5 to 3 to 1 (1.5 to 3:1). By including a pattern area (BMA) that is 1.5 to 3 times larger than the open area (OPA), the non-display area (NDA) can prevent light from leaking out of the outer edge of the display device (10) and prevent the non-display area (NDA) from being perceived by the user.

[0126] FIGS. 10 to 12 are plan views illustrating the cutting process of a display device according to another embodiment.

[0127] In FIG. 10, a plurality of second light-blocking members (BK2) may be spaced apart from each other in a first direction (X-axis direction) and a second direction (Y-axis direction). A plurality of second light-blocking members (BK2) may be adjacent in a diagonal direction between the first direction (X-axis direction) and the second direction (Y-axis direction), or in a diagonal direction between the direction opposite to the first direction (X-axis direction) and the second direction (Y-axis direction). For example, the second light-blocking members (BK2) may have an elliptical shape, but are not limited thereto. As another example, the second light-blocking members (BK2) may have a circular shape or a semicircular shape. The second light-blocking members (BK2) can block the transmission of light. Thus, the second light-blocking members (BK2) can prevent light from leaking out of the outer edge of the display device (10).

[0128] When performing a cutting process using an infrared laser along the second direction (Y-axis direction), the cut surface may be damaged by the infrared laser and may have a certain error. Therefore, the cut surface of the non-displayed area (NDA) may have a rough surface or an irregular plane.

[0129] In FIG. 11, the cut surface of the display device (10) can be polished through a polishing process. Protruding parts of the cut surface can be removed by the polishing process, and the sides of the display device (10) can be flattened. Through the polishing process, the display device (10) can minimize the laser-damaged area and reduce the size of the non-display area (NDA).

[0130] In FIG. 12, by performing a polishing process on the cut surface of the display device (10), the area of ​​the second light-blocking member (BK2) placed at the outermost edge of the non-display area (NDA) may be smaller than the area of ​​the other second light-blocking member (BK2).

[0131] The non-display area (NDA) may include a pattern area (BMA) and an open area (OPA). The pattern area (BMA) may be an area within the non-display area (NDA) where the second light-blocking member (BK2) is placed, and the open area (OPA) may be an area within the non-display area (NDA) excluding the pattern area (BMA). For example, the area ratio of the pattern area (BMA) and the open area (OPA) may be 1.5 to 3 to 1 (1.5 to 3:1). By including a pattern area (BMA) that is 1.5 to 3 times larger than the open area (OPA), the non-display area (NDA) can prevent light from leaking out of the outer edge of the display device (10) and prevent the non-display area (NDA) from being perceived by the user.

[0132] FIGS. 13 to 15 are plan views illustrating the cutting process of a display device according to another embodiment.

[0133] In FIG. 13, a plurality of second light-blocking members (BK2) may be spaced apart from each other in a first direction (X-axis direction) and a second direction (Y-axis direction). A plurality of second light-blocking members (BK2) may be adjacent in a diagonal direction between the first direction (X-axis direction) and the second direction (Y-axis direction), or in a diagonal direction between the direction opposite to the first direction (X-axis direction) and the second direction (Y-axis direction). For example, the second light-blocking members (BK2) may have a rhombus shape, but are not limited thereto. The second light-blocking members (BK2) can block the transmission of light. Thus, the second light-blocking members (BK2) can prevent light from leaking out of the outer edge of the display device (10).

[0134] When performing a cutting process using an infrared laser along the second direction (Y-axis direction), the cut surface may be damaged by the infrared laser and may have a certain error. Therefore, the cut surface of the non-displayed area (NDA) may have a rough surface or an irregular plane.

[0135] In FIG. 14, the cut surface of the display device (10) can be polished through a polishing process. Protruding parts of the cut surface can be removed by the polishing process, and the sides of the display device (10) can be flattened. Through the polishing process, the display device (10) can minimize the laser-damaged area and reduce the size of the non-display area (NDA).

[0136] In FIG. 15, by performing a polishing process on the cut surface of the display device (10), the area of ​​the second light-blocking member (BK2) placed at the outermost edge of the non-display area (NDA) may be smaller than the area of ​​the other second light-blocking member (BK2).

[0137] The non-display area (NDA) may include a pattern area (BMA) and an open area (OPA). The pattern area (BMA) may be an area within the non-display area (NDA) where the second light-blocking member (BK2) is placed, and the open area (OPA) may be an area within the non-display area (NDA) excluding the pattern area (BMA). For example, the area ratio of the pattern area (BMA) and the open area (OPA) may be 1.5 to 3 to 1 (1.5 to 3:1). By including a pattern area (BMA) that is 1.5 to 3 times larger than the open area (OPA), the non-display area (NDA) can prevent light from leaking out of the outer edge of the display device (10) and prevent the non-display area (NDA) from being perceived by the user.

[0138] FIGS. 16 to 18 are plan views illustrating the cutting process of a display device according to another embodiment.

[0139] In FIG. 16, a plurality of second light-blocking members (BK2) may be spaced apart from each other in a first direction (X-axis direction) and a second direction (Y-axis direction). A plurality of second light-blocking members (BK2) may be adjacent in a diagonal direction between the first direction (X-axis direction) and the second direction (Y-axis direction), or in a diagonal direction between the direction opposite to the first direction (X-axis direction) and the second direction (Y-axis direction). For example, the second light-blocking members (BK2) may have a square shape, but are not limited thereto. As another example, the second light-blocking members (BK2) may have a polygonal shape. The second light-blocking members (BK2) can block the transmission of light. Thus, the second light-blocking members (BK2) can prevent light from leaking out of the outer edge of the display device (10).

[0140] When performing a cutting process using an infrared laser along the second direction (Y-axis direction), the cut surface may be damaged by the infrared laser and may have a certain error. Therefore, the cut surface of the non-displayed area (NDA) may have a rough surface or an irregular plane.

[0141] In FIG. 17, the cut surface of the display device (10) can be polished through a polishing process. Protruding parts of the cut surface can be removed by the polishing process, and the sides of the display device (10) can be flattened. Through the polishing process, the display device (10) can minimize the laser-damaged area and reduce the size of the non-display area (NDA).

[0142] In FIG. 18, by performing a polishing process on the cut surface of the display device (10), the area of ​​the second light-blocking member (BK2) placed at the outermost edge of the non-display area (NDA) may be smaller than the area of ​​the other second light-blocking member (BK2).

[0143] The non-display area (NDA) may include a pattern area (BMA) and an open area (OPA). The pattern area (BMA) may be an area within the non-display area (NDA) where the second light-blocking member (BK2) is placed, and the open area (OPA) may be an area within the non-display area (NDA) excluding the pattern area (BMA). For example, the area ratio of the pattern area (BMA) and the open area (OPA) may be 1.5 to 3 to 1 (1.5 to 3:1). By including a pattern area (BMA) that is 1.5 to 3 times larger than the open area (OPA), the non-display area (NDA) can prevent light from leaking out of the outer edge of the display device (10) and prevent the non-display area (NDA) from being perceived by the user.

[0144] FIG. 19 is a plan view showing the combined structure of a tile-type display device according to one embodiment, and FIG. 20 is a cross-sectional view taken along line II-II' of FIG. 19.

[0145] Referring to FIGS. 19 and 20, a tile-type display device (TD) may include a plurality of display devices (10), a connecting member (20), and a cover member (30). The plurality of display devices (10) may be arranged in a grid pattern, but are not limited thereto. The plurality of display devices (10) may be connected in a first direction (X-axis direction) or a second direction (Y-axis direction), and the tile-type display device (TD) may have a specific shape. For example, each of the plurality of display devices (10) may have the same size as each other, but is not limited thereto. As another example, the plurality of display devices (10) may have different sizes.

[0146] The tile-type display device (TD) may include first to fourth display devices (10-1 to 10-4). The number and combination relationship of the display devices (10) are not limited to the embodiment of FIG. 19. The number of display devices (10) may be determined according to the size of each of the display device (10) and the tile-type display device (TD).

[0147] The display device (10) may include a display area (DA) and a non-display area (NDA). The display area (DA) may include a plurality of pixels to display an image. The non-display area (NDA) may be placed around the display area (DA) to surround the display area (DA) and may not display an image.

[0148] A display device (10) may include a plurality of pixels arranged along a plurality of rows and columns in a display area (DA). Each of the plurality of pixels may include a light-emitting region (LA) defined by a pixel defining film or bank, and may emit light having a predetermined peak wavelength through the light-emitting region (LA). For example, the display area (DA) of the display device (10) may include first to third light-emitting regions (LA1, LA2, LA3). Each of the first to third light-emitting regions (LA1, LA2, LA3) may be a region where light generated from a light-emitting element of the display device (10) is emitted to the outside of the display device (10).

[0149] The first to third light-emitting regions (LA1, LA2, LA3) may be sequentially and repeatedly arranged along the first direction (X-axis direction) of the display area (DA). For example, the area of ​​the first light-emitting region (LA1) may be larger than the area of ​​the second light-emitting region (LA2), and the area of ​​the second light-emitting region (LA2) may be larger than the area of ​​the third light-emitting region (LA3). As another example, the area of ​​the first light-emitting region (LA1), the area of ​​the second light-emitting region (LA2), and the area of ​​the third light-emitting region (LA3) may be substantially the same.

[0150] The display area (DA) of the display device (10) may include a light-blocking area (BA) surrounding a plurality of light-emitting areas (LA). The light-blocking area (BA) can prevent the mixing of light emitted from the first to third light-emitting areas (LA1, LA2, LA3).

[0151] A tile-type display device (TD) may include a bonding area (SM) positioned between a plurality of display areas (DA). The tile-type display device (TD) may be formed by connecting the non-display areas (NDA) of each adjacent display device (10). A plurality of display devices (10) may be connected to each other through a bonding member (20) or an adhesive member positioned in the bonding area (SM). A bonding area (SM) of each of the plurality of display devices (10) may not include a pad portion or a flexible film attached to the pad portion. Accordingly, the distance between the display areas (DA) of each of the plurality of display devices (10) may be close enough that the bonding area (SM) between the plurality of display devices (10) is not perceived by the user. Additionally, the external light reflectance of each display area (DA) of the plurality of display devices (10) and the external light reflectance of the bonding area (SM) between the plurality of display devices (10) may be substantially the same. Accordingly, the tile-type display device (TD) can improve the sense of disconnection between the multiple display devices (10) and enhance the immersion of the image by preventing the user from perceiving the combined area (SM) between the multiple display devices (10).

[0152] The bonding area (SM) may include a second light-blocking member (BK2). For example, the width of the second light-blocking member (BK2) adjacent to the bonding member (20) may be smaller than the width of another second light-blocking member (BK2), but is not limited thereto. The second light-blocking member (BK2) can prevent light from leaking from a plurality of display devices (10) through the bonding area (SM). The tile-type display device (10) may reduce the brightness ratio between the display area (DA) and the bonding area (SM) by including the second light-blocking member (BK2) disposed in the bonding area (SM). Alternatively, the tile-type display device (10) may reduce the difference between the maximum brightness of the display area (DA) and the maximum brightness of the bonding area (SM) by including the second light-blocking member (BK2) disposed in the bonding area (SM). Accordingly, the second light-blocking member (BK2) can improve the sense of disconnection between multiple display devices (10) and enhance the immersion of the image by preventing the connection area (SM) between them from being perceived by the user.

[0153] The bonding area (SM) may include a pattern area (BMA), an open area (OPA), and a bonding member (20). The pattern area (BMA) may be an area within the bonding area (SM) where a second light-blocking member (BK2) is placed, and the open area (OPA) may be an area within the bonding area (SM) excluding the pattern area (BMA) and the bonding member (20). For example, the area ratio of the pattern area (BMA) and the open area (OPA) may be 1.5 to 3 to 1 (1.5 to 3:1). By including a pattern area (BMA) that is 1.5 to 3 times larger than the open area (OPA), the bonding area (SM) may be prevented from being perceived by the user, improve the sense of disconnection between multiple display devices (10), and enhance the immersion of the image.

[0154] A tile-type display device (TD) can connect the sides of adjacent display devices (10) by using a connecting member (20) placed between each of the multiple display devices (10). The connecting member (20) can implement the tile-type display device (TD) by connecting the sides of the first to fourth display devices (10-1 to 10-4) arranged in a grid shape. The connecting member (20) can connect the sides of the substrate (SUB), the side of the thin-film transistor layer (TFTL), the side of the light-emitting element layer (EML), the sides of the first and second capping layers (CAP1, CAP2), the side of the second light-blocking member (BK2), the side of the third protective layer (PAS3), the side of the encapsulation layer (TFE), and the side of the anti-reflection film (ARF) of the adjacent display devices (10).

[0155] For example, the connecting member (20) can be made of an adhesive or double-sided tape having a relatively thin thickness, thereby minimizing the gap between multiple display devices (10). As another example, the connecting member (20) can be made of a connecting frame having a relatively thin thickness, thereby minimizing the gap between multiple display devices (10). Thus, the tile-type display device (TD) can prevent the connecting area (SM) between multiple display devices (10) from being perceived by the user.

[0156] A cover member (30) is disposed on the upper surface of a plurality of display devices (10) and a coupling member (20) to cover the plurality of display devices (10) and the coupling member (20). For example, the cover member (30) may be disposed on the upper surface of the anti-reflection film (ARF) and the coupling member (20) of each of the plurality of display devices (10). The cover member (30) can protect the upper surface of a tile-type display device (TD).

[0157] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing the technical concept or essential features thereof. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. Explanation of the symbols

[0158] TD: Tile display 10: Display device 20: Connecting member 30: Cover member SUB: Substrate DPL: Display layer TFTL: Thin film transistor layer EML: Light-emitting diode layer WLCL: Wavelength conversion layer CFL: Color filter layer BK1: First light-blocking element BK2: Second light-blocking element TFE: Encapsulation layer ARF: Anti-reflective coating PD1, PD2: 1st and 2nd pad sections FPCB: Flexible Film DIC: Data Driver

Claims

Claim 1 A display device comprising: a substrate including a display area having a plurality of light-emitting regions and a light-blocking region, and a non-display area surrounding the display area; a thin-film transistor layer disposed on the substrate and including a plurality of thin-film transistors; a light-emitting element layer disposed on the thin-film transistor layer and including a plurality of light-emitting elements; a wavelength conversion layer that converts the peak wavelength of light provided from at least some of the light-emitting elements; a color filter layer disposed on the wavelength conversion layer; and an encapsulation layer disposed on the light-emitting element layer and located on the color filter layer, wherein the color filter layer comprises a plurality of color filters disposed in each of the plurality of light-emitting regions; a first light-blocking member disposed in the light-blocking region; and a second light-blocking member disposed in the non-display area, and the encapsulation layer covers the second light-blocking member. Claim 2 A display device according to claim 1, wherein the height of the second light-blocking member is greater than or equal to the height of the first light-blocking member and less than or equal to the height of the plurality of color filters, the height of the second light-blocking member is the distance from the lower surface of the second light-blocking member to the upper surface of the second light-blocking member, the height of the first light-blocking member is the distance from the lower surface of the first light-blocking member to the upper surface of the first light-blocking member, and the height of the plurality of color filters is the height from the lower surface of the second light-blocking member to the upper surface of the plurality of color filters. Claim 3 A display device according to claim 1, wherein the non-display area includes a pattern area on which the second light-blocking member is disposed, and an open area excluding the pattern area, and the area ratio of the pattern area and the open area is 1.5 to 3 to 1. Claim 4 In claim 1, the second light-blocking member is a display device having at least one closed-loop shape surrounding the display area. Claim 5 In claim 1, the second light-blocking member is a display device having at least one of a circle, an ellipse, a semicircle, or a polygonal shape. Claim 6 In claim 1, the second light-blocking member comprises a material that blocks visible light and transmits infrared light, forming a display device. Claim 7 A display device according to claim 1, wherein the width of the second light-blocking member disposed at the outermost edge of the non-display area is smaller than the width of another second light-blocking member. Claim 8 A display device according to claim 1, wherein the plurality of light-emitting regions includes first to third light-emitting regions that emit different colors, and the wavelength conversion layer comprises: a first wavelength conversion unit disposed in the first light-emitting region and converting the peak wavelength of light incident from the plurality of light-emitting elements to a first peak wavelength; a second wavelength conversion unit disposed in the second light-emitting region and converting the peak wavelength of light incident from the plurality of light-emitting elements to a second peak wavelength different from the first peak wavelength; and a light transmission unit disposed in the third light-emitting region and transmitting the light incident from the plurality of light-emitting elements. Claim 9 In claim 8, the plurality of color filters comprises a first color filter disposed on the first wavelength conversion unit; a second color filter disposed on the second wavelength conversion unit; and a third color filter disposed on the light transmission unit, and the first light-blocking member is disposed on the wavelength conversion layer and has a grid shape surrounding the first to third color filters. Claim 10 In claim 9, the first light-blocking member positioned at the outermost edge of the first light-blocking member is a display device surrounding the side of the wavelength conversion layer. Claim 11 In claim 9, the second light-blocking member is disposed on the light-emitting element layer and surrounds the side of the wavelength conversion layer in a spaced-apart manner. Claim 12 A tile-type display device comprising: a plurality of display devices including a display area having a plurality of light-emitting regions and a light-blocking region, and a coupling region disposed between the display areas; and a coupling member for coupling the plurality of display devices in the coupling region, wherein each of the first display device and the second display device adjacent to each other among the plurality of display devices comprises: a substrate; a thin-film transistor layer disposed on the substrate and comprising a plurality of thin-film transistors; a light-emitting element layer disposed on the thin-film transistor layer and comprising a plurality of light-emitting elements; a wavelength conversion layer disposed on the light-emitting element layer and converting the peak wavelength of light provided by at least some of the light-emitting elements among the plurality of light-emitting elements; and a color filter layer disposed on the wavelength conversion layer, wherein the color filter layer comprises a plurality of color filters disposed in each of the plurality of light-emitting regions; a first light-blocking member disposed in the light-blocking region; and a second light-blocking member disposed in the coupling region, wherein the coupling member is disposed between the second light-blocking member of the first display device and the second light-blocking member of the second display device. Claim 13 A tile-type display device according to claim 12, wherein the height of the second light-blocking member is greater than or equal to the height of the first light-blocking member and less than or equal to the height of the plurality of color filters, the height of the second light-blocking member is the distance from the lower surface of the second light-blocking member to the upper surface of the second light-blocking member, the height of the first light-blocking member is the distance from the lower surface of the first light-blocking member to the upper surface of the first light-blocking member, and the height of the plurality of color filters is the height from the lower surface of the second light-blocking member to the upper surface of the plurality of color filters. Claim 14 A tile-type display device according to claim 12, wherein the combined area includes a pattern area on which the second light-blocking member is disposed, and an open area excluding the pattern area, and the area ratio of the pattern area and the open area is 1.5 to 3 to 1. Claim 15 In claim 12, the second light-blocking member is a tile-type display device having at least one closed-loop shape surrounding the display area. Claim 16 In claim 12, the second light-blocking member is a tile-type display device having at least one of a circle, an ellipse, a semicircle, or a polygonal shape. Claim 17 In claim 12, the second light-blocking member comprises a material that blocks visible light and transmits infrared light, forming a tile-type display device. Claim 18 In claim 12, the coupling member is a tile-type display device that combines the side of the substrate of the plurality of display devices, the side of the thin-film transistor layer, the side of the light-emitting element layer, and the side of the second light-blocking member. Claim 19 In claim 12, each of the plurality of display devices further comprises: an encapsulation layer disposed on the color filter layer; and an anti-reflection film disposed on the encapsulation layer to prevent reflection of external light, forming a tile-type display device. Claim 20 A tile-type display device in claim 19, further comprising a cover member covering the upper surface of each of the plurality of display devices and a reflective film and a coupling member.

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