Display device

Abstract

The present invention relates to a display device. A display device according to one embodiment comprises a thin-film transistor layer disposed on a substrate, a light-emitting element layer disposed on the thin-film transistor layer, an encapsulation layer disposed on the light-emitting element layer, a touch sensing layer disposed on the encapsulation layer, and a reflection control layer disposed on the touch sensing layer and comprising at least one UV absorber, wherein the UV absorber may comprise at least one hydrophobic group.

Description

Technology Field

[0001] The present invention relates to a display device. Background Technology

[0002] As the information society develops, the demand for display devices to show 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.

[0003] Display devices include anti-reflective materials, such as polarizers, attached to the display panel to reduce the reflection of external light by the metal wiring of the display panel. Recently, research is continuing to reduce the reflection of external light while omitting polarizers to lower manufacturing costs. The problem to be solved

[0004] The problem that the present invention aims to solve is to provide a display device that can reduce manufacturing costs by simplifying the process.

[0005] 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

[0006] A display device according to one embodiment for solving the above problem comprises a thin-film transistor layer disposed on a substrate, a light-emitting element layer disposed on the thin-film transistor layer, an encapsulation layer disposed on the light-emitting element layer, a touch sensing layer disposed on the encapsulation layer, and a reflection control layer disposed on the touch sensing layer and comprising at least one UV absorber, wherein the UV absorber may comprise at least one hydrophobic group.

[0007] The reflection control layer may include an absorbing member comprising at least one of a dye or a pigment.

[0008] The above UV absorber comprises a matrix to which at least one hydrophobic group is attached, and the matrix may comprise one or more compounds selected from benzophenone-based, benzotriazole-based, salicylate-based, cyanoacrylate-based, and oxanilide-based compounds.

[0009] The above at least one hydrophobic group may include one or more of an alkyl group or a fluoroalkyl group.

[0010] The above alkyl group can be represented by the following chemical formula 1.

[0011] [Chemical Formula 1]

[0012] CH3-(CH2)m-

[0013] Here, m is an integer greater than or equal to 12.

[0014] The above fluoroalkyl group can be represented by the following chemical formula 2.

[0015] [Chemical Formula 2]

[0016] CF3-(CF2)m-(CH2)n-

[0017] The above m+n is an integer greater than or equal to 3.

[0018] The content of the above UV absorber may be 0.5 wt% to 5 wt% with respect to the above reflection control layer.

[0019] The above UV absorber may have a concentration gradient in which the concentration increases as it moves away from the touch sensing layer within the reflection control layer.

[0020] It may further include a patterned black matrix disposed between the touch sensing layer and the reflection control layer.

[0021] Additionally, a display device according to one embodiment comprises a thin-film transistor layer disposed on a substrate, a light-emitting element layer disposed on the thin-film transistor layer, an encapsulation layer disposed on the light-emitting element layer, a touch sensing layer disposed on the encapsulation layer, and a reflection control layer disposed on the touch sensing layer and comprising at least a UV absorber, wherein the reflection control layer may have a concentration gradient in which the concentration of the UV absorber increases as it moves away from the touch sensing layer.

[0022] The reflection control layer can be disposed over the entire upper surface of the touch sensing layer.

[0023] The light-emitting element layer may include a pixel electrode disposed on the thin-film transistor layer, a light-emitting layer disposed on the pixel electrode, a common electrode disposed on the light-emitting layer, and a light-absorbing layer disposed on the common electrode.

[0024] The light absorption layer may include a metal or a metal oxide.

[0025] The above encapsulation layer may include a first encapsulation inorganic film disposed on the common electrode and the light absorption layer, an encapsulation organic film disposed on the first encapsulation inorganic film, and a second encapsulation inorganic film disposed on the encapsulation organic film.

[0026] The touch sensing layer is disposed on the second encapsulating inorganic film and may include a driving electrode, a sensing electrode, and a connecting electrode.

[0027] The above UV absorber comprises a matrix and a matrix to which at least one hydrophobic group bonded to the matrix is ​​bonded, and the matrix may comprise one or more compounds selected from benzophenone-based, benzotriazole-based, salicylate-based, cyanoacrylate-based, and oxanilide-based compounds.

[0028] The above at least one hydrophobic group may include one or more of an alkyl group or a fluoroalkyl group.

[0029] The above alkyl group can be represented by the following chemical formula 1.

[0030] [Chemical Formula 1]

[0031] CH3-(CH2)m-

[0032] Here, m is an integer greater than or equal to 12.

[0033] The above fluoroalkyl group can be represented by the following chemical formula 2.

[0034] [Chemical Formula 2]

[0035] CF3-(CF2)m-(CH2)n-

[0036] The above m+n is an integer greater than or equal to 3.

[0037] The content of the above UV absorber may be 0.5 wt% to 5 wt% with respect to the above reflection control layer.

[0038] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0039] According to the display device of the embodiments, it is possible to prevent the color tone and transmittance of the reflection control layer from changing due to sunlight.

[0040] In addition, according to the display device of the embodiments, by combining hydrophobic groups with the UV absorber, a UV absorber can be formed on top of the reflection control layer without a separate mask process. Therefore, the manufacturing cost of the display device can be reduced and the process simplified.

[0041] 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

[0042] FIG. 1 is a perspective view showing a display device according to one embodiment. FIG. 2 is a plan view showing a display device according to one embodiment. FIG. 3 is a side view showing a display device according to one embodiment. Figure 4 is a layout diagram schematically showing an example of the touch sensing layer of Figure 3. Figure 5 is an enlarged plan view showing in detail an example of area A of Figure 4. FIG. 6 is a cross-sectional view showing an example of a display panel cut along the line I-I' of FIG. 5. FIG. 7 is a cross-sectional view schematically showing a reflection control layer according to one embodiment. FIG. 8 is a cross-sectional view schematically showing a reflection control layer according to one embodiment. FIG. 9 is a schematic diagram showing a UV absorber of a reflection control layer according to one embodiment. FIGS. 10 and FIGS. 11 are cross-sectional views showing the manufacturing process of a reflection control layer according to one embodiment, step by step. FIG. 12 is a cross-sectional view schematically showing a display device according to another embodiment. Figure 13 is an image showing the contact angle of water of the reflection control layer sample #1. Figure 14 is an image showing the contact angle of water of the reflection control layer sample #2. Figure 15 is an image showing the contact angle of water of the reflection control layer sample #3. Figure 16 is a graph showing the ultraviolet-visible spectrum of reflection control layer sample #1 at the beginning and after 80 hours. Figure 17 is a graph showing the ultraviolet-visible spectrum of the reflection control layer sample #4 at the beginning and after 80 hours. Figure 18 is a graph showing the ultraviolet-visible spectrum of the reflection control layer sample #3 at the beginning and after 80 hours. Figure 19 is a graph showing the ultraviolet-visible spectrum of the reflection control layer sample #5 at the beginning and after 80 hours. Figure 20 is a graph showing the ultraviolet-visible spectrum of the reflection control layer sample #6 at the beginning and after 80 hours. Figure 21 is a graph showing the ultraviolet-visible spectrum of the reflection control layer sample #7 at the beginning and after 80 hours. Specific details for implementing the invention

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Specific embodiments will be described below with reference to the attached drawings.

[0048] FIG. 1 is a perspective view showing a display device according to one embodiment. FIG. 2 is a plan view showing a display device according to one embodiment. FIG. 3 is a side view showing a display device according to one embodiment.

[0049] Referring to FIGS. 1 to 3, a display device (10) according to one embodiment may be applied to portable electronic devices such as a mobile phone, a smartphone, a tablet PC, a mobile communication terminal, an electronic notebook, an e-book, a PMP (portable multimedia player), a navigation system, a UMPC (Ultra Mobile PC), etc. Alternatively, a display device (10) according to one embodiment may be applied to a television, a laptop, a monitor, an advertising board, or a display unit of the Internet of Things (IOT). Alternatively, a display device (10) according to one embodiment may be applied to a wearable device such as a smart watch, a watch phone, a glasses-type display, and a head-mounted display (HMD). Alternatively, a display device (10) according to one embodiment may be applied to a center information display (CID) placed on the instrument panel of a vehicle, the center fascia of a vehicle, the dashboard of a vehicle, a room mirror display replacing the side mirror of a vehicle, or a display placed on the back of the front seat as entertainment for the rear seat of a vehicle.

[0050] The display device (10) may be a light-emitting display device such as an organic light-emitting display device using an organic light-emitting diode, a quantum dot light-emitting display device including a quantum dot light-emitting layer, an inorganic light-emitting display device including an inorganic semiconductor, and a micro light-emitting display device using a micro or nano light-emitting diode (micro LED or nano LED). Although the following description focuses on the display device (10) being an organic light-emitting display device, the present invention is not limited thereto.

[0051] The display device (10) includes a display panel (100), a display driving circuit (200), a display circuit board (300), and a touch driving circuit (400).

[0052] The display panel (100) may be formed as a rectangular plane having a short side in a first direction (X-axis direction) and a long side in a second direction (Y-axis direction) that intersects the first direction (X-axis direction). The corner where the short side in the first direction (X-axis direction) and the long side in the second direction (Y-axis direction) meet may be formed rounded to have a predetermined curvature or formed at a right angle. The planar shape of the display panel (100) is not limited to a rectangle and may be formed as other polygons, circles, or ellipses. The display panel (100) may be formed flat, but is not limited thereto. For example, the display panel (100) includes a curved surface formed at the left and right ends, having a constant curvature or a changing curvature. In addition, the display panel (100) may be formed flexibly so that it can be bent, curved, folded, or rolled.

[0053] The display panel (100) includes a main area (MA) and a sub-area (SBA).

[0054] The main area (MA) includes a display area (DA) that displays an image and a non-display area (NDA) which is a surrounding area of ​​the display area (DA). The display area (DA) includes pixels (PX in FIG. 5) that display an image. A sub-area (SBA) may protrude in a second direction (Y-axis direction) from one side of the main area (MA).

[0055] In FIGS. 1 and 2, the sub-region (SBA) is illustrated as being unfolded, but the sub-region (SBA) can be bent as shown in FIG. 3, and in this case, it can be placed on the lower surface of the display panel (100). When the sub-region (SBA) is bent, it can overlap with the main region (MA) in the thickness direction (Z-axis direction) of the substrate (SUB). A display driving circuit (200) can be placed in the sub-region (SBA).

[0056] Additionally, the display panel (100) includes a substrate (SUB), a thin-film transistor layer (TFTL), a light-emitting element layer (EML), an encapsulation layer (TFEL), a touch sensing layer (SENL), and a reflection control layer (RCL) as shown in FIG. 3.

[0057] A thin-film transistor layer (TFTL) may be disposed on a substrate (SUB). The thin-film transistor layer (TFTL) may be disposed in a main region (MA) and a sub-region (SBA). The thin-film transistor layer (TFTL) includes transistors (ST1 in FIG. 6).

[0058] The light-emitting element layer (EML) can be disposed on the thin-film transistor layer (TFTL). The light-emitting element layer (EML) can be disposed in the display area (DA) of the main area (MA). The light-emitting element layer (EML) includes light-emitting elements disposed in the light-emitting parts.

[0059] The encapsulation layer (TFEL) may be disposed on the light-emitting element layer (EML). The encapsulation layer (TFEL) may be disposed in the display area (DA) and non-display area (NDA) of the main area (MA). The encapsulation layer (TFEL) comprises at least one inorganic film and at least one organic film for encapsulating the light-emitting element layer.

[0060] The touch sensing layer (SENL) can be disposed on the encapsulation layer (TFEL). The touch sensing layer (SENL) can be disposed in the display area (DA) and non-display area (NDA) of the main area (MA). The touch sensing layer (SENL) can detect the touch of a person or object using sensor electrodes.

[0061] A reflection control layer (RCL) may be placed on the touch sensing layer (SENL). The reflection control layer (RCL) may be placed in the display area (DA) and non-display area (NDA) of the main area (MA). The reflection control layer (RCL) may be an anti-reflective member for reducing external light from being reflected from the metal wiring and metal electrodes of the display panel (100). A detailed description of the reflection control layer (RCL) will be provided later.

[0062] A cover window for protecting the upper part of the display panel (100) may be disposed on the reflection control layer (RCL). The cover window may be attached to the reflection control layer (RCL) by a transparent adhesive member such as an optically clear adhesive (OCA) film or an optically clear resin (OCR). The cover window may be an inorganic material such as glass, or an organic material such as plastic or polymer material.

[0063] The display driving circuit (200) can generate signals and voltages to drive the display panel (100). The display driving circuit (200) can be formed as an integrated circuit (IC) and attached to the display panel (100) using a COG (chip on glass) method, a COP (chip on plastic) method, or an ultrasonic bonding method, but is not limited thereto. For example, the display driving circuit (200) can be attached to the display circuit board (300) using a COF (chip on film) method.

[0064] A display circuit board (300) can be attached to one end of a sub-region (SBA) of a display panel (100). As a result, the display circuit board (300) can be electrically connected to the display panel (100) and the display driving circuit (200). The display panel (100) and the display driving circuit (200) can receive digital video data, timing signals, and driving voltages through the display circuit board (300). The display circuit board (300) may be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip-on-film.

[0065] The touch driving circuit (400) can be placed on the display circuit board (300). The touch driving circuit (400) can be formed as an integrated circuit (IC) and attached to the display circuit board (300).

[0066] A touch driving circuit (400) may be electrically connected to sensor electrodes of a touch sensing layer (SENL) of a display panel (100). The touch driving circuit (400) applies driving signals to the sensor electrodes of the touch sensing layer (SENL) and measures the mutual capacitance values ​​of the sensor electrodes. The driving signal may be a signal having a plurality of driving pulses. The touch driving circuit (400) may determine whether a user touches and whether there is proximity based on the mutual capacitance values. A user touch refers to an object, such as a user's finger or a pen, directly contacting one side of the display device (10) placed on the touch sensing layer (SENL). A user proximity refers to an object, such as a user's finger or a pen, hovering away from one side of the display device (10).

[0067] As shown in FIGS. 1 to 3, the display panel (100) includes a reflection control layer (RCL) to reduce the reflection of external light by the metal wiring and metal electrodes of the display panel (100). As a result, there is no need to attach a separate anti-reflection member, such as a polarizer, to the display panel (100), thereby reducing the manufacturing cost of the display device (10).

[0068] Figure 4 is a layout diagram schematically showing an example of the touch sensing layer of Figure 3.

[0069] In FIG. 4, the sensor electrodes (SE) of the touch sensing layer (SENL) include two types of electrodes, for example, driving electrodes (TE) and sensing electrodes (RE), and are driven in a mutual capacitance manner in which a voltage charged in mutual capacitance is detected through the sensing electrodes (RE) after a driving signal is applied to the driving electrodes (TE), but is not limited thereto.

[0070] In FIG. 4, for convenience of explanation, only the driving electrodes (TE), sensing electrodes (RE), dummy patterns (DE), sensor wirings (TL1, TL2, RL), and sensor pads (TP1, TP2) are shown.

[0071] Referring to FIG. 4, the touch sensing layer (SENL) includes a touch sensor area (TSA) for detecting a user's touch and a touch peripheral area (TPA) disposed around the touch sensor area (TSA). The touch sensor area (TSA) may overlap with the display area (DA) of FIG. 1 to 3, and the touch peripheral area (TPA) may overlap with the non-display area (NDA) of FIG. 1 to 3.

[0072] The touch sensor area (TSA) includes driving electrodes (TE), sensing electrodes (RE), and dummy patterns (DE). The driving electrodes (TE) and sensing electrodes (RE) may be electrodes for forming mutual capacitance to detect the touch of an object or person.

[0073] The sensing electrodes (RE) can be arranged parallel to each other in a first direction (X-axis direction) and a second direction (Y-axis direction). The sensing electrodes (RE) can be electrically connected in the first direction (X-axis direction). Adjacent sensing electrodes (RE) in the first direction (X-axis direction) can be connected to each other. Adjacent sensing electrodes (RE) in the second direction (Y-axis direction) can be electrically separated from each other.

[0074] Driving electrodes (TE) can be arranged in parallel in a first direction (X-axis direction) and a second direction (Y-axis direction). Adjacent driving electrodes (TE) in the first direction (X-axis direction) can be electrically separated from each other. Driving electrodes (TE) can be electrically connected in the second direction (Y-axis direction). For example, adjacent driving electrodes (TE) in the second direction (Y-axis direction) can be connected to each other through a connecting electrode (BE1) as shown in FIG. 5.

[0075] Each of the dummy patterns (DE) may be surrounded by a driving electrode (TE) or a sensing electrode (RE). Each of the dummy patterns (DE) may be electrically isolated from the driving electrode (TE) or the sensing electrode (RE). Each of the dummy patterns (DE) may be positioned apart from the driving electrode (TE) or the sensing electrode (RE). Each of the dummy patterns (DE) may be electrically floating.

[0076] In FIG. 4, the driving electrodes (TE), sensing electrodes (RE), and dummy patterns (DE) are each illustrated as having a rhombus planar shape, but are not limited thereto. For example, the driving electrodes (TE), sensing electrodes (RE), and dummy patterns (DE) may each have a planar shape other than a rhombus, a polygon other than a square, a circle, or an ellipse.

[0077] Sensor wiring (TL1, TL2, RL) may be placed in a sensor peripheral area (TPA). The sensor wiring (TL1, TL2, RL) includes sensing wiring (RL) connected to sensing electrodes (RE), first driving wiring (TL1) and second driving wiring (TL2) connected to driving electrodes (TE).

[0078] Sensing electrodes (RE) positioned on one side of the touch sensor area (TSA) can be connected one-to-one to sensing wires (RL). For example, as shown in FIG. 4, a sensing electrode (RE) positioned at the right end among the sensing electrodes (RE) electrically connected in the first direction (X-axis direction) can be connected to a sensing wire (RL). The sensing wires (RL) can be connected one-to-one to the second sensor pads (TP2). Therefore, the touch driving circuit (330) can be electrically connected to the sensing electrodes (RE).

[0079] Driving electrodes (TE) positioned on one side of the touch sensor area (TSA) may be connected one-to-one to the first driving wires (TL1), and driving electrodes (TE) positioned on the other side of the touch sensor area (TSA) may be connected one-to-one to the second driving wires (TL2). For example, as shown in FIG. 4, among the driving electrodes (TE) electrically connected in the second direction (Y-axis direction), the driving electrode (TE) positioned at the lower end may be connected to the first driving wire (TL1), and the driving electrode (TE) positioned at the upper end may be connected to the second driving wire (TL2). The second driving wires (TL2) may be connected to the driving electrodes (TE) at the upper side of the touch sensor area (TSA) via the left outer side of the touch sensor area (TSA).

[0080] The first driving wires (TL1) and the second driving wires (TL2) can be connected one-to-one to the first sensor pads (TP1). Therefore, the touch driving circuit (330) can be electrically connected to the driving electrodes (TE). Since the driving electrodes (TE) are connected to the driving wires (TL1, TL2) on both sides of the touch sensor area (TSA) to receive the touch driving signal, it is possible to prevent a difference from occurring between the touch driving signal applied to the driving electrodes (TE) located on the lower side of the touch sensor area (TSA) and the touch driving signal applied to the driving electrodes (TE) located on the upper side of the touch sensor area (TSA) due to the RC delay of the touch driving signal.

[0081] A first sensor pad area (TPA1) in which first sensor pads (TP1) are placed may be placed on one side of a display pad area (DPA) in which display pads (DP) are placed. A second sensor pad area (TPA2) in which second sensor pads (TP2) are placed may be placed on the other side of the display pad area (DPA). The display pads (DP) may be electrically connected to the data wiring of the display panel (100).

[0082] The display pad area (DPA), the first sensor pad area (TPA1), and the second sensor pad area (TPA2) may correspond to pads of a display panel (100) connected to a display circuit board (300) shown in FIG. 2. A display circuit board (300) may be disposed on the display pads (DP), the first sensor pads (TP1), and the second sensor pads (TP2). The display pads (DP), the first sensor pads (TP1), and the second sensor pads (TP2) may be electrically connected to the display circuit board (300) using a low-resistance, high-reliability material such as an anisotropic conductive film or SAP. Therefore, the display pads (DP), the first sensor pads (TP1), and the second sensor pads (TP2) may be electrically connected to a touch driving circuit (400) disposed on the display circuit board (300).

[0083] Figure 5 is an enlarged plan view showing in detail an example of area A of Figure 4.

[0084] Referring to FIG. 5, the driving electrodes (TE) and the sensing electrodes (RE) are placed on the same layer, so they can be placed apart from each other. That is, a gap can be formed between adjacent driving electrodes (TE) and sensing electrodes (RE).

[0085] In addition, the dummy pattern (DE) can also be placed on the same layer as the driving electrodes (TE) and the sensing electrodes (RE). That is, a gap can be formed between adjacent driving electrodes (TE) and the dummy pattern (DE), and between adjacent sensing electrodes (RE) and the dummy pattern (DE).

[0086] The connecting electrodes (BE1) may be placed on a different layer from the driving electrodes (TE) and the sensing electrodes (RE). The connecting electrode (BE1) may be formed to be bent at least once. In FIG. 5, the connecting electrode (BE1) is illustrated as having a bracket shape ("<" or ">"), but the planar shape of the connecting electrode (BE1) is not limited thereto. Since driving electrodes (TE) adjacent to each other in the second direction (Y-axis direction) are connected by a plurality of connecting electrodes (BE1), even if one of the connecting electrodes (BE1) is disconnected, the driving electrodes (TE) adjacent to each other in the second direction (Y-axis direction) can be stably connected. In FIG. 5, driving electrodes (TE) adjacent to each other are illustrated as being connected by two connecting electrodes (BE1), but the number of connecting electrodes (BE1) is not limited thereto.

[0087] The connecting electrode (BE1) can overlap adjacent driving electrodes (TE) in the second direction (Y-axis direction) from the third direction (Z-axis direction), which is the thickness direction of the substrate (SUB). The connecting electrode (BE1) can overlap with the sensing electrode (RE) in the third direction (Z-axis direction). One side of the connecting electrode (BE1) can be connected to any one of the driving electrodes (TE) adjacent in the second direction (Y-axis direction) through touch contact holes (TCNT1). The other side of the connecting electrode (BE1) can be connected to another driving electrode (TE) adjacent in the second direction (Y-axis direction) through touch contact holes (TCNT1).

[0088] Due to the connecting electrodes (BE1), the driving electrodes (TE) and the sensing electrodes (RE) can be electrically separated at their intersections. As a result, mutual capacitance can be formed between the driving electrodes (TE) and the sensing electrodes (RE).

[0089] Each of the driving electrodes (TE), sensing electrodes (RE), and connecting electrodes (BE1) may have a planar shape of a mesh structure or a net structure. Additionally, each of the dummy patterns (DE) may have a planar shape of a mesh structure or a net structure. As a result, each of the driving electrodes (TE), sensing electrodes (RE), connecting electrodes (BE1), and dummy patterns (DE) may not overlap with the light-emitting parts (EA1, EA2, EA3, EA4) of each pixel (PX). Therefore, the light emitted from the light-emitting parts (EA1, EA2, EA3, EA4) may be blocked by the driving electrodes (TE), sensing electrodes (RE), connecting electrodes (BE1), and dummy patterns (DE), thereby preventing a reduction in the brightness of the light.

[0090] Each of the pixels (PX) includes a first light-emitting part (EA1) that emits light of a first color, a second light-emitting part (EA2) that emits light of a second color, a third light-emitting part (EA3) that emits light of a third color, and a fourth light-emitting part (EA4) that emits light of a second color. For example, the first color may be red, the second color may be green, and the third color may be blue.

[0091] The first light-emitting part (EA1) and the second light-emitting part (EA2) of each pixel (PX) may be adjacent to each other in the fourth direction (DR4), and the third light-emitting part (EA3) and the fourth light-emitting part (EA4) may be adjacent to each other in the fourth direction (DR4). The first light-emitting part (EA1) and the fourth light-emitting part (EA4) of each pixel (PX) may be adjacent to each other in the fifth direction (DR5), and the second light-emitting part (EA2) and the third light-emitting part (EA3) may be adjacent to each other in the fifth direction (DR5).

[0092] Each of the first light-emitting part (EA1), the second light-emitting part (EA2), the third light-emitting part (EA3), and the fourth light-emitting part (EA4) may have a rhombus-shaped planar form or a rectangular planar form, but is not limited thereto. Each of the first light-emitting part (EA1), the second light-emitting part (EA2), the third light-emitting part (EA3), and the fourth light-emitting part (EA4) may have a polygonal, circular, or elliptical planar form other than a rectangle. Additionally, FIG. 5 illustrates that the area of ​​the third light-emitting part (EA3) is the largest and the areas of the second light-emitting part (EA2) and the fourth light-emitting part (EA4) are the smallest, but is not limited thereto.

[0093] The second light-emitting parts (EA2) and the fourth light-emitting parts (EA4) may be arranged in odd rows. The second light-emitting parts (EA2) and the fourth light-emitting parts (EA4) may be arranged side by side in the first direction (X-axis direction) in each of the odd rows. The second light-emitting parts (EA2) and the fourth light-emitting parts (EA4) may be arranged alternately in each of the odd rows. Each of the second light-emitting parts (EA2) may have a short side in the fourth direction (DR4) and a long side in the fifth direction (DR5), whereas each of the fourth light-emitting parts (EA4) may have a long side in the fourth direction (DR4) and a short side in the fifth direction (DR5). The fourth direction (DR4) may be a direction between the first direction (X-axis direction) and the second direction (Y-axis direction), and may be a direction inclined at 45 degrees relative to the first direction (X-axis direction). The fifth direction (DR5) may be a direction orthogonal to the fourth direction (DR4).

[0094] The first light-emitting parts (EA1) and the third light-emitting parts (EA3) can be arranged in even rows. The first light-emitting parts (EA1) and the third light-emitting parts (EA3) can be arranged side by side in the first direction (X-axis direction) in each of the even rows. The first light-emitting parts (EA1) and the third light-emitting parts (EA3) can be arranged alternately in each of the even rows.

[0095] The second light-emitting units (EA2) and the fourth light-emitting units (EA4) can be arranged in odd columns. The second light-emitting units (EA2) and the fourth light-emitting units (EA4) can be arranged side by side in the second direction (Y-axis direction) in each of the odd columns. The second light-emitting units (EA2) and the fourth light-emitting units (EA4) can be arranged alternately in each of the odd columns.

[0096] The first light-emitting parts (EA1) and the third light-emitting parts (EA3) can be arranged in even columns. The first light-emitting parts (EA1) and the third light-emitting parts (EA3) can be arranged side by side in the second direction (Y-axis direction) in each of the even columns. The first light-emitting parts (EA1) and the third light-emitting parts (EA3) can be arranged alternately in each of the even columns.

[0097] FIG. 6 is a cross-sectional view showing an example of a display panel cut along the line I-I' of FIG. 5. FIG. 7 is a cross-sectional view schematically showing a reflection control layer according to one embodiment. FIG. 8 is a cross-sectional view schematically showing a reflection control layer according to one embodiment. FIG. 9 is a diagram schematically showing a UV absorber of a reflection control layer according to one embodiment.

[0098] Referring to FIG. 6, a first buffer film (BF1) may be disposed on a substrate (SUB). The substrate (SUB) may be made of an insulating material such as a polymer resin. For example, the substrate (SUB) may be made of polyimide. The substrate (SUB) may be a flexible substrate capable of bending, folding, rolling, etc.

[0099] The first buffer film (BF1) is a film for protecting the transistors of the thin-film transistor layer (TFTL) and the light-emitting layer (172) of the light-emitting element layer (EML) from moisture penetrating through a substrate (SUB) that is vulnerable to moisture permeability. The first buffer film (BF1) may be composed of a plurality of inorganic films that are alternately stacked. For example, the first buffer film (BF1) may be formed as a multilayer film in which one or more inorganic materials selected from silicon nitride, silicon oxide, silicon nitrate, titanium oxide, and aluminum oxide are alternately stacked.

[0100] A transistor (ST1) may be disposed on the first buffer layer (BF1). The transistor (ST1) includes an active layer (ACT1), a gate electrode (G1), a source electrode (S1), and a drain electrode (D1).

[0101] The active layer (ACT1), source electrode (S1), and drain electrode (D1) of a transistor (ST1) may be disposed on the first buffer film (BF1). The active layer (ACT1) of the transistor (ST1) includes polycrystalline silicon, single-crystal silicon, low-temperature polycrystalline silicon, amorphous silicon, or an oxide semiconductor. of the substrate (SUB).

[0102] The active layer (ACT1) that overlaps with the gate electrode (G1) in the third direction (Z-axis direction), which is the thickness direction, can be defined as a channel region. The source electrode (S1) and the drain electrode (D1) are regions that do not overlap with the gate electrode (G1) in the third direction (Z-axis direction), and may have conductivity by doping ions or impurities into a silicon semiconductor or oxide semiconductor.

[0103] A gate insulating film (130) may be disposed on the active layer (ACT1), source electrode (S1), and drain electrode (D1) of the transistor (ST1). The gate insulating film (130) may be formed of an inorganic film, for example, silicon nitride, silicon oxide, silicon nitrate, titanium oxide, or aluminum oxide.

[0104] A gate electrode (G1) of a transistor (ST1) may be disposed on the gate insulating film (130). The gate electrode (G1) may overlap with the active layer (ACT1) in a third direction (Z-axis direction). The gate electrode (G1) may be formed as a single layer or a multilayer made 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.

[0105] A first interlayer insulating film (141) may be disposed on the gate electrode (G1) of the transistor (ST1). The first interlayer insulating film (141) may be formed of an inorganic film, for example, silicon nitride, silicon oxide, silicon nitrate, titanium oxide, or aluminum oxide. The first interlayer insulating film (141) may be formed of a plurality of inorganic films.

[0106] A capacitor electrode (CAE) may be disposed on the first interlayer insulating film (141). The capacitor electrode (CAE) may overlap with the gate electrode (G1) of the first transistor (ST1) in the third direction (Z-axis direction). Since the first interlayer insulating film (141) has a predetermined dielectric constant, a capacitor may be formed by the capacitor electrode (CAE), the gate electrode (G1), and the first interlayer insulating film (141) disposed between them. The capacitor electrode (CAE) may be formed as a single layer or a multilayer made 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.

[0107] A second interlayer insulating film (142) may be disposed on the capacitor electrode (CAE). The second interlayer insulating film (142) may be formed of an inorganic film, for example, silicon nitride, silicon oxide, silicon nitrate, titanium oxide, or aluminum oxide. The second interlayer insulating film (142) may be formed of a plurality of inorganic films.

[0108] A first anode connection electrode (ANDE1) may be disposed on the second interlayer insulating film (142). The first anode connection electrode (ANDE1) may be connected to the drain electrode (D1) of the transistor (ST1) through a first connection contact hole (ANCT1) penetrating the gate insulating film (130), the first interlayer insulating film (141), and the second interlayer insulating film (142). The first anode connection electrode (ANDE1) may be formed as a single layer or a multilayer made 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.

[0109] A first flattening film (160) for flattening the step difference caused by the transistor (ST1) may be disposed on the first anode connection electrode (ANDE1). The first flattening film (160) may be formed from an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0110] A second anode connecting electrode (ANDE2) may be disposed on the first flattening film (160). The second anode connecting electrode (ANDE2) may be connected to the first anode connecting electrode (ANDE1) through a second connecting contact hole (ANCT2) that penetrates the first flattening film (160). The second anode connecting electrode (ANDE2) may be formed as a single layer or a multilayer made 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.

[0111] A second planarization film (180) may be disposed on the second anode connection electrode (ANDE2). The second planarization film (180) may be formed from an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0112] A light-emitting element (LEL) and a bank (190) may be disposed on the second planarization film (180). Each of the light-emitting elements (LEL) includes a pixel electrode (171), a light-emitting layer (172), and a common electrode (173).

[0113] The pixel electrode (171) can be placed on the second planarization film (180). The pixel electrode (171) can be connected to the second anode connection electrode (ANDE2) through a third connection contact hole (ANCT3) that penetrates the second planarization film (180).

[0114] In a top emission structure that emits light in the direction of a common electrode (173) based on a light-emitting layer (172), the pixel electrode (171) can be formed of a highly reflective metallic material such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (Indium Tin Oxide) (ITO / Al / ITO), an APC alloy, and a stacked structure of APC alloy and ITO (ITO / APC / ITO). The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

[0115] A bank (190) may be formed to partition a pixel electrode (171) on a second planarization film (180) to define a first light-emitting part (EA1), a second light-emitting part (EA2), a third light-emitting part (EA3), and a fourth light-emitting part (EA4 in FIG. 5). The bank (190) may be positioned to cover the edges of the pixel electrode (171). The bank (190) may be formed from an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0116] Each of the first light-emitting part (EA1), the second light-emitting part (EA2), the third light-emitting part (EA3), and the fourth light-emitting part (EA4) represents a region in which a pixel electrode (171), a light-emitting layer (172), and a common electrode (173) are sequentially stacked, and light is emitted by holes from the pixel electrode (171) and electrons from the common electrode (173) combining with each other in the light-emitting layer (172).

[0117] A light-emitting layer (172) may be disposed on the pixel electrode (171) and the bank (190). The light-emitting layer (172) may include an organic material and emit a predetermined color. For example, the light-emitting layer (172) includes a hole transporting layer, an organic material layer, and an electron transporting layer.

[0118] A common electrode (173) may be disposed on a light-emitting layer (172). The common electrode (173) may be disposed to cover the light-emitting layer (172). The common electrode (173) may be a common layer formed commonly on the first light-emitting part (EA1), the second light-emitting part (EA2), the third light-emitting part (EA3), and the fourth light-emitting part (EA4 in FIG. 5). A capping layer may be formed on the common electrode (173).

[0119] In the upper light-emitting structure, the common electrode (173) can be formed from a transparent conductive material (TCO) such as ITO or IZO that can transmit light, or a semi-transmissive conductive material such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). When the common electrode (173) is formed from a semi-transmissive conductive material, the light emission efficiency can be increased by the micro cavity.

[0120] The light-emitting element layer (EML) may include a light-absorbing layer (LAL) disposed on a common electrode (173). The light-absorbing layer (LAL) may be disposed on the common electrode (173) corresponding to the first light-emitting part (EA1), the second light-emitting part (EA2), the third light-emitting part (EA3), and the fourth light-emitting part (EA4 in FIG. 5). The light-absorbing layer (LAL) may be disposed on each of the first light-emitting part (EA1), the second light-emitting part (EA2), the third light-emitting part (EA3), and the fourth light-emitting part (EA4 in FIG. 5), but spaced apart from each other. The light-absorbing layer (LAL) can absorb light to reduce the reflection of external light. The light-absorbing layer (LAL) may include at least one of a metal or a metal oxide. For example, metals may include aluminum (Al), silver (Ag), magnesium (Mg), chromium (Cr), titanium (Ti), nickel (Ni), gold (Au), tantalum (Ta), copper (Cu), calcium (Ca), cobalt (Co), iron (Fe), molybdenum (Mo), tungsten (W), platinum (Pt), or ytterbium (Yb). Metal oxides may include silicon oxide, titanium oxide, zirconium oxide, tantalum oxide, hafnium oxide, aluminum oxide, zinc oxide, yttrium oxide, beryllium oxide, magnesium oxide, lead oxide, or tungsten oxide. Additionally, the light absorption layer (LAL) may include silicon nitride, lithium fluoride, calcium fluoride, magnesium fluoride, cadmium sulfide, etc.

[0121] An encapsulation layer (TFEL) may be disposed on the light-emitting element layer (EML). The encapsulation layer (TFEL) includes at least one inorganic film to prevent oxygen or moisture from penetrating the light-emitting element layer (EML). Additionally, the encapsulation layer (TFEL) includes at least one organic film to protect the light-emitting element layer (EML) from foreign substances such as dust. For example, the encapsulation layer (TFEL) includes a first encapsulation inorganic film (TFE1), an encapsulation organic film (TFE2), and a second encapsulation inorganic film (TFE3).

[0122] A first encapsulating inorganic film (TFE1) may be disposed on the light absorption layer (LAL) and the common electrode (173), an encapsulating organic film (TFE2) may be disposed on the first encapsulating inorganic film (TFE1), and a second encapsulating inorganic film (TFE3) may be disposed on the encapsulating organic film (TFE2). The first encapsulating inorganic film (TFE1) and the second encapsulating inorganic film (TFE3) may be formed as a multilayer film in which one or more inorganic materials selected from silicon nitride, silicon oxide, silicon nitrate, titanium oxide, or aluminum oxide are alternately stacked. The encapsulating organic film (TFE2) may be an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0123] A touch sensing layer (SENL) may be disposed on the encapsulation layer (TFEL). The touch sensing layer (SENL) includes a second buffer film (BF2), a connecting electrode (BE1), a first touch insulating film (TINS1), a driving electrode (TE), a sensing electrode (RE), and a second touch insulating film (TINS2).

[0124] The second buffer film (BF2) may be formed from an inorganic film, for example, silicon nitride, silicon oxide, silicon nitrate, titanium oxide, or aluminum oxide. A connecting electrode (BE1) may be disposed on the second buffer film (BF2). The connecting electrode (BE1) may be formed as a single layer or a multilayer made 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.

[0125] A first touch insulating film (TINS1) is disposed on the connecting electrode (BE1). The first touch insulating film (TINS1) may be formed from an inorganic film, for example, silicon nitride, silicon oxide, silicon nitrate, titanium oxide, or aluminum oxide. Alternatively, the first touch insulating film (TINS1) may be formed from an organic film such as an acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0126] A driving electrode (TE) and a sensing electrode (RE) may be disposed on the first touch insulating film (TINS1). In addition, not only the driving electrode (TE) and the sensing electrode (RE), but also the dummy patterns (DE) shown in FIG. 4, the first driving wires (TL1), the second driving wires (TL2), and the sensing wires (RL) may be disposed on the first touch insulating film (TINS1).

[0127] The driving electrode (TE) and the sensing electrode (RE) can overlap with the connecting electrode (BE1) in a third direction (Z-axis direction). The driving electrode (TE) can be connected to the connecting electrode (BE1) through a touch contact hole (TCNT1) penetrating the first touch insulating film (TINS1). The driving electrode (TE) and the sensing electrode (RE) may include an anti-reflection layer to reduce the reflection of light incident from the outside.

[0128] A second touch insulating film (TINS2) is formed on the driving electrode (TE) and the sensing electrode (RE). The second touch insulating film (TINS2) can serve to flatten the step formed by the driving electrode (TE), the sensing electrode (RE), and the connecting electrode (BE1). The second touch insulating film (TINS2) can be formed from an organic film such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin.

[0129] A reflection control layer (RCL) may be disposed on the touch sensing layer (SENL). The reflection control layer (RCL) may be disposed directly over the entire upper surface of the touch sensing layer (SENL). The reflection control layer (RCL) may be disposed over the entire display area (DA) at least, and may also be disposed over the non-display area (NDA).

[0130] Referring to FIG. 7, the reflection control layer (RCL) can reduce reflected light by absorbing light incident from the outside. To absorb light, the reflection control layer (RCL) may include a base material (MTX) mixed with an absorption member (LAM).

[0131] The base material (MTX) is the main material of the reflection control layer (RCL) and can be formed from an organic film such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0132] The absorption member (LAM) may be an absorption member for absorbing light incident from the outside. The absorption member (LAM) may selectively absorb light of a certain wavelength range among the light incident from the outside. For example, the absorption member (LAM) may transmit light in a first wavelength range, a second wavelength range, and a third wavelength range, and selectively absorb light in other wavelength ranges. Here, the light in the first wavelength range may be green light, the light in the second wavelength range may be blue light, and the light in the third wavelength range may be red light.

[0133] The absorbing member (LAM) may include a dye. The dye may include, for example, one or more selected from the tetraazaporphyrin series, porphyrin series, oxazine series, squarylium series, triarylmethane series, polymethine (cyanine) series, anthraquinone series, phthalocyanine series, azo series, perylene series, xanthene series, diimmonium series, and dipyrromethene series. However, it is not limited thereto, and the absorbing member (LAM) may include a pigment, or may include both a dye and a pigment. In addition, if the absorption member (LAM) contains one or more dyes, the light absorption performance can be significantly improved. In addition to the dyes or pigments mentioned above, any material capable of absorbing light within a selected wavelength range can be used as the absorption member (LAM).

[0134] The absorption member (LAM) may be included in a range of 0.001 wt% to 5 wt% relative to the reflection control layer (RCL) to absorb light in a desired wavelength range.

[0135] A reflection control layer (RCL) according to one embodiment comprises the above-described base material (MTX) and absorption member (LAM), and may further comprise a UV absorber (UAM).

[0136] Referring to FIGS. 8 and 9, the UV absorber (UAM) is intended to reduce damage to the reflection control layer (RCL) caused by sunlight and can play a role in absorbing UV. When the display device (10) is exposed to sunlight, the reflection color of the reflection control layer (RCL) changes to reddish, causing the color of the light emitted from the display device (10) to change and the light transmittance to change. Therefore, in one embodiment, the UV absorber (UAM) is included in the reflection control layer (RCL) to reduce damage caused by sunlight.

[0137] In one embodiment, to form a UV absorber (UAM) to be disposed on top within a reflection control layer (RCL), the UV absorber (UAM) may include at least one hydrophobic group (US). When the UV absorber (UAM) is disposed on top of the reflection control layer (RCL), the UV of sunlight incident on top of the reflection control layer (RCL) can be effectively absorbed.

[0138] A UV absorber (UAM) according to one embodiment may include a matrix (UM) and at least one hydrophobic group (US) bonded to the matrix (UM).

[0139] The parent body (UM) may include one or more compounds selected from benzophenone-based, benzotriazole-based, salicylate-based, cyanoacrylate-based, and oxanilide-based compounds that can absorb UV light.

[0140] At least one hydrophobic group (US) may include one or more of an alkyl group or a fluoroalkyl group. If the hydrophobic group (US) includes an alkyl group, the alkyl group may include at least 13 carbon atoms. The alkyl group may be formed in a chain form. If the alkyl group includes 13 or more carbon atoms, hydrophobicity may be increased. The alkyl group may be represented by the following chemical formula 1.

[0141] [Chemical Formula 1]

[0142] CH3-(CH2)m-

[0143] Here, m is an integer greater than or equal to 12.

[0144] Additionally, the hydrophobic group (US) may include an alkyl group containing fluorine (F). The alkyl group containing fluorine (F) may be a fluoroalkyl group. Here, a fluoroalkyl group may mean that at least one hydrogen of the alkyl group is substituted. The fluoroalkyl group may be represented by the following chemical formula 2.

[0145] [Chemical Formula 2]

[0146] CF3-(CF2)m-(CH2)n-

[0147] Here, m+n is an integer greater than or equal to 3.

[0148] Examples of fluoroalkyl groups are as follows, but are not limited thereto, and all fluoroalkyl groups represented by the above chemical formulas can be applied.

[0149]

[0150] The above m and n are each integers greater than or equal to 1.

[0151]

[0152]

[0153]

[0154]

[0155]

[0156] UV absorbers (UAM) combined with hydrophobic groups (US) can be represented by, for example, the following chemical formulas.

[0157]

[0158]

[0159] The above R1 is hydrogen or an alkyl group.

[0160] The UV absorber (UAM) combined with the aforementioned hydrophobic group (US) can be mixed with an absorbing member (LAM) within a base material (MTX) to form a reflective control layer (RCL).

[0161] As shown in FIG. 7, the absorption member (LAM) can be evenly dispersed and arranged within the base material (MTX). On the other hand, as shown in FIG. 8, the UV absorber (UAM) can be arranged within the base material (MTX) to have a concentration gradient in which the concentration increases from the bottom to the top of the reflection control layer (RCL).

[0162] FIGS. 10 and FIGS. 11 are cross-sectional views showing the manufacturing process of a reflection control layer according to one embodiment, step by step.

[0163] Referring to FIG. 10, a base material (MTX), an absorbing member (LAM), and a UV absorber (UAM) combined with hydrophobic groups are mixed in a solvent in a predetermined amount, and then coated onto a touch sensing layer (SENL) by a solution process to form a reflection control layer (RCL). The UV absorber (UAM) may be mixed in the reflection control layer (RCL) in a range of 0.5 wt% to 5 wt%. Immediately after coating, the base material (MTX), the absorbing member (LAM), and the UV absorber (UAM) may be evenly dispersed within the reflection control layer (RCL).

[0164] Next, referring to FIG. 11, a first heat treatment is performed on the reflection control layer (RCL) to remove the solvent. The first heat treatment can be performed at a temperature of 100 degrees or less for several seconds to tens of seconds. At this time, as the solvent volatilizes, the UV absorber (UAM) with attached hydrophobic groups rises to the top within the reflection control layer (RCL) due to the hydrophobic groups. Therefore, the UV absorber (UAM) can have a concentration gradient in which the concentration increases as it moves upward within the reflection control layer (RCL). That is, the UV absorber (UAM) can have a concentration gradient in which the concentration increases as it moves away from the touch sensing layer (SENL) within the reflection control layer (RCL).

[0165] When the solvent is completely removed, the base material (MTX) forms the body of the reflection control layer (RCL), and the absorption member (LAM) is arranged in a state of even dispersion within the base material (MTX). Subsequently, a secondary heat treatment is performed at a temperature of 100 degrees or higher for several minutes to tens of minutes to finally form the reflection control layer (RCL).

[0166] As described above, in one embodiment, by combining hydrophobic groups with the UV absorber (UAM), the UV absorber (UAM) can be formed on the upper surface of the reflection control layer (RCL) without a separate mask process. Accordingly, the manufacturing cost of the display device (10) can be reduced and the process can be simplified.

[0167] FIG. 12 is a cross-sectional view schematically showing a display device according to another embodiment.

[0168] Referring to FIG. 12, the display device (10) may further include a patterned black matrix (BM) between the touch sensing layer (SENL) and the reflection control layer (RCL). This embodiment differs from the previously described embodiment in that it further includes a black matrix (BM). Hereinafter, the description of identical configurations will be omitted, and the description of configurations that differ will be provided.

[0169] A patterned black matrix (BM) may be placed between the touch sensing layer (SENL) and the reflection control layer (RCL). The black matrix (BM) absorbs light to prevent the light between each light-emitting part (EA1, EA2, EA3, EA4) from mixing and becoming mixed, and can partition each light-emitting part (EA1, EA2, EA3, EA4). The black matrix (BM) is formed in a patterned shape including openings corresponding to each light-emitting part (EA1, EA2, EA3, EA4), and may be formed in a mesh shape, for example. The black matrix (BM) may overlap with the bank (190).

[0170] In this embodiment, by further including a patterned black matrix (BM) between the touch sensing layer (SENL) and the reflection control layer (RCL), the reflection control layer (RCL) absorbs some light to lower the reflectivity, and the black matrix (BM) also absorbs some light to further lower the reflectivity.

[0171] The embodiments are described in more detail below through manufacturing examples and experimental examples.

[0172] <Preparation Example 1: Preparation of Reflection Control Layer 1>

[0173] Reflection control layer sample #1 was prepared by mixing acrylic resin and an absorbing member in a solvent, coating, and performing first and second heat treatments. Reflection control layer sample #2 was prepared by mixing the following UV absorber #1 at 1.5 wt% into reflection control layer sample #1, and reflection control layer sample #3 was prepared by mixing the following UV absorber #2 at 1.5 wt%.

[0174]

[0175] <UV 흡수제#1>

[0176]

[0177] <UV 흡수제#2>

[0178] <Experimental Example 1: Measurement of Water Contact Angle>

[0179] Water was dropped onto the surfaces of each of the reflection control layer samples #1, #2, and #3 to measure the contact angle. Fig. 13 is an image showing the water contact angle of reflection control layer sample #1, Fig. 14 is an image showing the water contact angle of reflection control layer sample #2, and Fig. 15 is an image showing the water contact angle of reflection control layer sample #3.

[0180] Referring to FIGS. 13 to 15, the water contact angle of reflection control layer sample #1 was found to be 76 degrees, the water contact angle of reflection control layer sample #2 was found to be 81 degrees, and the water contact angle of reflection control layer sample #3 was found to be 89 degrees.

[0181] In other words, compared to reflection control layer sample #1, which did not contain a UV absorber with hydrophobic groups, it was found that the water contact angle increased as the number of carbon atoms in the hydrophobic group increased, while containing a UV absorber with hydrophobic groups.

[0182] Through this, it can be seen that in one embodiment, by including a UV absorber having a long hydrophobic group in the carbon chain, the UV absorber can be formed to be concentrated at the top due to hydrophobicity within the reflection control layer.

[0183] <Preparation Example 2: Preparation of Reflection Control Layer 2>

[0184] Reflection control layer sample #4 was prepared by mixing 1.5 wt% of a benzothiazole-based UV absorber without hydrophobic groups into the reflection control layer sample #1. Additionally, reflection control layer sample #5 was prepared under the same conditions as reflection control layer sample #1, differing only in that polyimide resin was used instead of acrylic resin. Reflection control layer sample #6 was prepared under the same conditions as reflection control layer sample #4, differing only in that polyimide resin was used instead of acrylic resin. Reflection control layer sample #7 was prepared under the same conditions as reflection control layer sample #3, differing only in that polyimide resin was used instead of acrylic resin.

[0185] <Experimental Example 2: Measurement of Ultraviolet-Visible Spectrum of Reflection Control Layer>

[0186] The initial ultraviolet-visible spectrum of each of the reflection control layer samples #1, #3, #4, #5, #6, and #7 was measured, and the ultraviolet-visible spectrum was measured after irradiating light for 80 hours using an NVF403 solar lamp (Philips) at room temperature.

[0187] Figure 16 is a graph showing the initial and after 80 hours of the UV-Visible spectrum of reflection control layer sample #1. Figure 17 is a graph showing the initial and after 80 hours of the UV-Visible spectrum of reflection control layer sample #4. Figure 18 is a graph showing the initial and after 80 hours of the UV-Visible spectrum of reflection control layer sample #3. Figure 19 is a graph showing the initial and after 80 hours of the UV-Visible spectrum of reflection control layer sample #5. Figure 20 is a graph showing the initial and after 80 hours of the UV-Visible spectrum of reflection control layer sample #6. Figure 21 is a graph showing the initial and after 80 hours of the UV-Visible spectrum of reflection control layer sample #7.

[0188] Referring to Fig. 16, the change in the minimum transmittance between the initial state and after 80 hours for Reflection Control Layer Sample #1, which is free of UV absorbers, was approximately 13.9%. Referring to Fig. 17, the change in the minimum transmittance between the initial state and after 80 hours for Reflection Control Layer Sample #4, which has UV absorbers uniformly mixed in, was approximately 7.9%. Referring to Fig. 18, the change in the minimum transmittance between the initial state and after 80 hours for Reflection Control Layer Sample #3, which has UV absorbers with hydrophobic groups mixed in, was approximately 2.1%. Here, the minimum transmittance may refer to the transmittance at a wavelength of approximately 600 nm.

[0189] Through the ultraviolet-visible spectra of FIGS. 16 to 18, the change in transmittance of the reflection control layer sample #4, which contains a UV absorber, was reduced compared to the change in transmittance of the reflection control layer sample #1, which does not contain a UV absorber, in the case of the reflection control layer containing acrylic resin as a base material. In addition, the change in transmittance of the reflection control layer sample #3, which contains a UV absorber having hydrophobic groups, was reduced compared to the change in transmittance of the reflection control layer sample #4, which contains a UV absorber without hydrophobic groups.

[0190] Additionally, referring to Fig. 19, the change in the minimum transmittance between the initial state and after 80 hours for reflection control layer sample #5, which is free of UV absorbers, was approximately 47.0%. Referring to Fig. 20, the change in the minimum transmittance between the initial state and after 80 hours for reflection control layer sample #6, which has UV absorbers uniformly mixed in, was approximately 10.3%. Referring to Fig. 21, the change in the minimum transmittance between the initial state and after 80 hours for reflection control layer sample #7, which has UV absorbers with hydrophobic groups mixed in, was approximately 2.7%.

[0191] Through the ultraviolet-visible spectra of FIGS. 19 to 21, the change in transmittance of the reflection control layer sample #6, which contains a UV absorber, was reduced compared to the change in transmittance of the reflection control layer sample #5, which does not contain a UV absorber, in the reflection control layer containing polyimide as a base material. Additionally, the change in transmittance of the reflection control layer sample #7, which contains a UV absorber with hydrophobic groups, was reduced compared to the change in transmittance of the reflection control layer sample #6, which contains a UV absorber without hydrophobic groups.

[0192] Through this, by forming the UV absorber to be distributed on the upper part of the reflection control layer, including a UV absorber having hydrophobic groups, the change in light transmittance caused by sunlight can be reduced.

[0193] 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

[0194] 10: Display device SUB: Board TFTL: Thin-film transistor layer EML: Light-emitting diode layer TFEL: Encapsulation layer SENL: Touch sensing layer RCL: Reflection control layer LAM: Absorption element MTX: Base material UAM: UV absorber UM: Parent body US: Hydrophobic organ

Claims

Claim 1 A thin film transistor layer disposed on a substrate; a light-emitting element layer disposed on the thin film transistor layer; an encapsulation layer disposed on the light-emitting element layer; a touch sensing layer disposed on the encapsulation layer; and a reflection control layer disposed on the touch sensing layer and comprising at least a UV absorber, wherein the UV absorber comprises at least one hydrophobic group, and the reflection control layer comprises an absorbing member comprising a dye, and the entire light-emitting element layer overlaps. Claim 2 delete Claim 3 A display device according to claim 1, wherein the UV absorber comprises a matrix to which at least one hydrophobic group is bonded, and the matrix comprises one or more compounds selected from benzophenone-based, benzotriazole-based, salicylate-based, cyanoacrylate-based, and oxanilide-based compounds. Claim 4 A display device according to claim 3, wherein the at least one hydrophobic group comprises one or more of an alkyl group or a fluoroalkyl group. Claim 5 In claim 4, the alkyl group is a representation device represented by the following chemical formula 1. [Chemical Formula 1]CH3-(CH2)m-wherein m is an integer of 12 or more. Claim 6 In claim 4, the fluoroalkyl group is a representation device represented by the following chemical formula 2. [Chemical Formula 2] CF3-(CF2)m-(CH2)n-m+n is an integer of 3 or more. Claim 7 A display device according to claim 1, wherein the content of the UV absorber is 0.5 wt% to 5 wt% with respect to the reflection control layer. Claim 8 In claim 1, the UV absorber is a display device having a concentration gradient in which the concentration increases as it moves away from the touch sensing layer within the reflection control layer. Claim 9 A display device according to claim 1, further comprising a patterned black matrix disposed between the touch sensing layer and the reflection control layer. Claim 10 A thin film transistor layer disposed on a substrate; a light-emitting element layer disposed on the thin film transistor layer; an encapsulation layer disposed on the light-emitting element layer; a touch sensing layer disposed on the encapsulation layer; and a reflection control layer disposed on the touch sensing layer and comprising at least a UV absorber, wherein the reflection control layer has a concentration gradient in which the concentration of the UV absorber increases as it moves away from the touch sensing layer, and the reflection control layer comprises an absorbing member comprising a dye, and a display device overlapping with the entire light-emitting element layer. Claim 11 In claim 10, the reflection control layer is a display device disposed over the entire upper surface of the touch sensing layer. Claim 12 In claim 10, the light-emitting element layer comprises a pixel electrode disposed on the thin-film transistor layer, a light-emitting layer disposed on the pixel electrode, a common electrode disposed on the light-emitting layer, and a light-absorbing layer disposed on the common electrode. Claim 13 In claim 12, the light absorption layer comprises a metal or a metal oxide, in a display device. Claim 14 In claim 12, the encapsulation layer comprises a first encapsulation inorganic film disposed on the common electrode and the light absorption layer, an encapsulation organic film disposed on the first encapsulation inorganic film, and a second encapsulation inorganic film disposed on the encapsulation organic film. Claim 15 In claim 14, the touch sensing layer is disposed on the second encapsulating inorganic film, and the display device comprises a driving electrode, a sensing electrode, and a connecting electrode. Claim 16 A display device according to claim 10, wherein the UV absorber comprises a matrix and a matrix to which at least one hydrophobic group bonded to the matrix is ​​bonded, and the matrix comprises one or more compounds selected from benzophenone-based, benzotriazole-based, salicylate-based, cyanoacrylate-based, and oxanilide-based compounds. Claim 17 A display device according to claim 16, wherein the at least one hydrophobic group comprises one or more of an alkyl group or a fluoroalkyl group. Claim 18 In claim 17, the alkyl group is a representation device represented by the following chemical formula 1. [Chemical Formula 1]CH3-(CH2)m-wherein m is an integer of 12 or more. Claim 19 In claim 17, the fluoroalkyl group is a representation device represented by the following chemical formula 2. [Chemical Formula 2] CF3-(CF2)m-(CH2)n-m+n is an integer of 3 or more. Claim 20 A display device according to claim 16, wherein the content of the UV absorber is 0.5 wt% to 5 wt% with respect to the reflection control layer.

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