Display device

Abstract

A display device may include: a substrate; an inclined electrode disposed on the substrate and having an upper surface having an inclined slope; a pixel electrode disposed to overlap the inclined electrode; a light emitting layer disposed to overlap the pixel electrode; and a cathode disposed to overlap the light emitting layer, thereby increasing a viewing angle of the display device.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a display device. Background Art

[0002] The demand for display devices for displaying information, images, videos and messages is growing in various forms. Recently, various display devices such as liquid crystal displays and organic light emitting display devices have been used to display various information, images, videos and messages in a portable manner.

[0003] In the case of an organic light emitting display device, a top emission method in which light is emitted in a reverse direction of a substrate may be adopted to achieve a high aperture ratio and flexible circuit configuration on a substrate.

[0004] In the related top emission display device, there is a limitation in that the viewing angle is narrowed due to the resonance of light. Summary of the invention

[0005] Embodiments of the present disclosure may provide a display device having a wider viewing angle.

[0006] Embodiments of the present disclosure may provide a display device capable of increasing front brightness.

[0007] Embodiments of the present disclosure may provide a display device having improved viewing angle characteristics and capable of achieving low power consumption.

[0008] An embodiment of the present disclosure may provide a display device, comprising: a substrate; an inclined electrode, which is arranged on the substrate and is arranged so that the upper surface has an inclined slope; a pixel electrode, which is arranged to overlap with the inclined electrode; a light-emitting layer, which is arranged to overlap with the pixel electrode; and a cathode, which is arranged to overlap with the light-emitting layer.

[0009] A display device according to an embodiment of the present disclosure may further include an organic film planarization layer disposed between the oblique electrode and the pixel electrode and including a contact hole, wherein the oblique electrode contacts the pixel electrode through the contact hole in the organic film planarization layer.

[0010] A display device according to an embodiment of the present disclosure may further include a driving transistor disposed between the substrate and the inclined electrode, wherein the inclined electrode may be an electrode included in the driving transistor or a pattern electrically connected to the driving transistor.

[0011] The organic film planarization layer may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode. The pixel electrode may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode. The light emitting layer may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode, and the cathode may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode.

[0012] The substrate may include a normal sub-pixel and an inclined sub-pixel. The inclined electrode of the normal sub-pixel is arranged flatly, and the inclined electrode of the inclined sub-pixel may be arranged to have a slope less than or equal to the inclined slope.

[0013] According to an embodiment of the present disclosure, a display device having a wider viewing angle may be provided.

[0014] According to an embodiment of the present disclosure, a display device capable of increasing front brightness can be provided.

[0015] According to an embodiment of the present disclosure, a display device capable of achieving low power consumption having improved viewing angle characteristics can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will become more fully understood from the detailed description given hereinafter and the accompanying drawings, which are given by way of illustration only and thus do not constitute a limitation of the present invention.

[0017] Figure 1 is a diagram schematically illustrating a configuration of a display device according to an embodiment of the present disclosure.

[0018] Figure 2 is a cross-sectional view of the light emitting area in the display panel area.

[0019] Figure 3 is a cross-sectional view of a light emitting device according to an embodiment of the present disclosure.

[0020] Figure 4 is a graph showing an ideal viewing angle and a reduced viewing angle due to the microcavity effect.

[0021] Figure 5 is a cross-sectional view of a light emitting region in a display panel region according to an embodiment of the present disclosure.

[0022] Figure 6 is a diagram illustrating a method of arranging red sub-pixels of a display panel according to an embodiment of the present disclosure.

[0023] Figure 7 is a diagram illustrating a red sub-pixel according to an embodiment of the present disclosure.

[0024] Figure 8It is a diagram illustrating a method of arranging green sub-pixels of a display panel according to an embodiment of the present disclosure.

[0025] Fig. 9 It is a diagram illustrating a green sub-pixel according to an embodiment of the present disclosure.

[0026] Fig.10 It is a diagram illustrating a method of arranging blue sub-pixels of a display panel according to an embodiment of the present disclosure.

[0027] Fig.11 It is a diagram illustrating a blue sub-pixel according to an embodiment of the present disclosure.

[0028] Fig.12 It is a diagram of a display panel having divided regions according to an embodiment of the present disclosure.

[0029] Fig.13 It is according to an embodiment of the present disclosure Fig.12 A cross-sectional view of a light-emitting region in the left region of the display panel.

[0030] Fig.14 It is according to an embodiment of the present disclosure Fig.12 A cross-sectional view of a light-emitting region in the right region of the display panel.

[0031] Fig.15 A cross-sectional view of a light-emitting region of a display panel divided into regions according to an embodiment of the present disclosure.

[0032] Fig.16 It is a diagram of a display panel according to an embodiment of the present disclosure.

[0033] Fig.17 It is a diagram of an edge region of a display panel according to an embodiment of the present disclosure.

[0034] Fig.18 And Fig.19 It is a diagram of an edge region of a display panel according to an embodiment of the present disclosure.

[0035] Fig. 20 And Fig.21 It is a diagram of a display panel according to an embodiment of the present disclosure. Detailed Description

[0036] Hereinafter, embodiments of the present disclosure are described in detail with reference to the accompanying drawings. When assigning reference numerals to the components of each figure, the same reference numerals may be assigned to the same components even if the same components are shown in different figures. When it is determined that the discussion of known technologies or functions obscures the detailed description of the subject matter of the present disclosure, the detailed description of known technologies or functions may be skipped. As used herein, when a component "includes" or "has" another component or is "composed of" another component, unless the component is described as "only" including or "only" having another component or "only" consisting of another component, other components may be added to the component. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include plural forms.

[0037] Marks such as "first", "second", "A", "B", "(a)", and "(b)" may be used to describe components of the present disclosure. These marks are provided only to distinguish one component from another, and the nature, order or number of these components are not limited by these marks.

[0038] When describing the positional relationship between components, when two or more components are described as being "connected," "coupled," or "linked," the two or more components may be directly "connected," "coupled," or "linked," or another component may be inserted. Here, the other component may be included in one or more of the two or more components that are "connected," "coupled," or "linked" to each other.

[0039] When terms such as "after", "next", and "before" are used to describe a time-flow relationship related to components, operating methods, and manufacturing methods, they may include non-sequential relationships unless the terms "immediately" or "directly" are used.

[0040] When a numerical value or its corresponding information (eg, level) is specified for a component, the numerical value or the corresponding information may be interpreted as including tolerances generated due to various factors (eg, process factors, internal or external influences, or noise).

[0041] The term "may" fully encompasses the full meaning and scope of the term "can".

[0042] Hereinafter, various embodiments of the present disclosure are described in detail with reference to the accompanying drawings.

[0043] Figure 1 1 is a diagram schematically illustrating a configuration of a display device 100 according to an embodiment of the present disclosure. All components of the display device according to all embodiments are operably connected and configured.

[0044] Reference Figure 1, the touch display device 100 may include a display panel 110, a gate driving circuit 120 for driving the display panel 110, a data driving circuit 130, and a controller 140. In addition to the components for display driving, the touch display device 100 may further include components for touch sensing. However, the embodiments of the present disclosure are not limited thereto.

[0045] The display panel 110 may include a display area AA in which a plurality of sub-pixels SP are disposed and a non-display area NA located outside the display area AA. A plurality of gate lines GL and a plurality of data lines DL may be disposed on the display panel 110. The plurality of sub-pixels SP may be located in an area where the gate lines GL and the data lines DL intersect.

[0046] The gate driving circuit 120 may be controlled by the controller 140. The gate driving circuit 120 may sequentially output scan signals to a plurality of gate lines GL disposed on the display panel 110 to control the driving timing of the plurality of sub-pixels SP.

[0047] The gate driving circuit 120 may include one or more gate driver integrated circuits (GDICs). Depending on the driving method, the gate driving circuit 120 may be located on only one side or both sides of the display panel 110.

[0048] Each gate driver integrated circuit (GDIC) may be connected to a bonding pad of the display panel 110 using a tape automated bonding (TAB) method or a chip on glass (COG) method. Alternatively, each gate driver integrated circuit (GDIC) may be implemented as an in-panel gate (GIP) type and directly placed on the display panel 110. Alternatively, each gate driver integrated circuit (GDIC) may be integrated and disposed on the display panel 110. Alternatively, each gate driver integrated circuit (GDIC) may be implemented using a chip on film (COF) method mounted on a film connected to the display panel 110. However, the embodiments of the present disclosure are not limited thereto.

[0049] The data driving circuit 130 may receive image data DATA from the controller 140 and convert the image data DATA into an analog data voltage Vdata. The data driving circuit 130 may output the data voltage Vdata to each data line DL according to the timing of applying the scan signal through the gate line GL so that each sub-pixel can represent brightness according to the image data DATA.

[0050] The data driving circuit 130 may include one or more source driver integrated circuits (SDICs). Each source driver integrated circuit (SDIC) may include a shift register, a latch circuit, a digital-to-analog converter, and an output buffer. However, the embodiments of the present disclosure are not limited thereto.

[0051] Each source driver integrated circuit (SDIC) can be connected to the bonding pad of the display panel 110 using a tape automated bonding (TAB) method or a chip on glass (COG) method. Alternatively, each source driver integrated circuit (SDIC) can be directly disposed on the display panel 110. Alternatively, each source driver integrated circuit (SDIC) can be integrated and disposed on the display panel 110. Alternatively, each source driver integrated circuit (SDIC) can be implemented in a chip on film (COF) method. In this case, each source driver integrated circuit (SDIC) can be mounted on a film connected to the display panel 110 and electrically connected to the display panel 110 through a line on the film.

[0052] The controller 140 may provide various control signals to the gate driving circuit 120 and the data driving circuit 130 , and control operations of the gate driving circuit 120 and the data driving circuit 130 .

[0053] The controller 140 may be mounted on a printed circuit board (SUB) or a flexible printed circuit. The controller 140 may be electrically connected to the gate driving circuit 120 and the data driving circuit 130 through the printed circuit board (SUB) or the flexible printed circuit. The printed circuit board may also be referred to as a PCB.

[0054] The controller 140 may control the gate driving circuit 120 to output a scan signal according to a timing set in each frame. The controller 140 may convert image data received from an external source (e.g., a host system) into a data signal format used in the data driving circuit 130, and may output the converted image data DATA to the data driving circuit 130.

[0055] The controller 140 may receive various timing signals (including a vertical synchronization signal VSYNC, a horizontal synchronization signal HSYNC, an input data enable signal DE, and a clock signal CLK) and image data DATA from an external source (eg, a host system).

[0056] The controller 140 may generate various control signals using various timing signals received from the outside, and output the control signals to the gate driving circuit 120 and the data driving circuit 130 .

[0057] As an example, in order to control the gate driving circuit 120 , the controller 140 may output various gate control signals GCS including a gate start pulse, a gate shift clock GSC, and a gate output enable signal GOE to the gate driving circuit 120 .

[0058] The gate start pulse GSP may control the operation start timing of one or more gate driver integrated circuits (GDICs) constituting the gate driving circuit 120. The gate shift clock GSC may be a clock signal commonly input to one or more gate driver integrated circuits (GDICs), and may control the shift timing of the scan signal. The gate output enable signal GOE may specify the timing information of one or more gate driver integrated circuits (GDICs).

[0059] In addition, in order to control the data driving circuit 130 , the controller 140 may output various data control signals DCS including a source start pulse SSP, a source sampling clock SSC, and a source output enable signal SOE to the data driving circuit 130 .

[0060] The source start pulse SSP may control the data sampling start timing of one or more source driver integrated circuits (SDICs) constituting the data driving circuit 130. The source sampling clock SSC may be a clock signal for controlling the data sampling timing in each of the one or more source driver integrated circuits (SDICs). The source output enable signal SOE may control the output timing of the data driving circuit 130.

[0061] The touch display device 100 may supply various voltages or currents to the display panel 110 , the gate driving circuit 120 , and the data driving circuit 130 , or may further include a power management integrated circuit that controls various voltages or currents to be supplied.

[0062] Each sub-pixel SP may be a region defined by an intersection of a gate line GL and a data line DL, and a liquid crystal layer or a light emitting device may be provided depending on the type of the touch display device 100 .

[0063] For example, if the touch display device 100 is an organic light emitting display device 100, an organic light emitting diode (OLED) and various circuit elements may be provided in a plurality of sub-pixels SP. Each sub-pixel SP may display brightness corresponding to image data by controlling a current supplied to the organic light emitting diode (OLED) using various circuit elements. However, the embodiments of the present disclosure are not limited thereto.

[0064] Alternatively, in some cases, a light emitting diode (LED), a micro light emitting diode (μLED), or a quantum dot light emitting diode (QLED) may be provided in the sub-pixel SP. However, the embodiments of the present disclosure are not limited thereto.

[0065] Figure 2 is a cross-sectional view of a non-display area NA included in a display area AA of a display panel 110 according to an embodiment of the present disclosure.

[0066] exist Figure 1 In the display panel 110 shown in FIG. 1 , the touch sensor TS may be present inside the display panel 110, and Figure 2 is a cross-sectional view of the display panel 110 when the touch sensor TS exists inside the display panel 110 .

[0067] However, Figure 1 and Figure 2 It is a diagram only for an example of the display panel 110 including the touch sensor TS, and the present disclosure is not limited to the display panel 110 including the touch sensor TS.

[0068] Reference Figure 2 , the substrate SUB may include a first substrate SUB1, an interlayer insulating film IPD, and a second substrate SUB2. However, the embodiments of the present disclosure are not limited thereto. The interlayer insulating film IPD may be located between the first substrate SUB1 and the second substrate SUB2. By constituting the substrate SUB with the first substrate SUB1, the interlayer insulating film IPD, and the second substrate SUB2, moisture penetration may be prevented. However, the embodiments of the present disclosure are not limited thereto. For example, the first substrate SUB1 and the second substrate SUB2 may be polyimide (PI) substrates. The first substrate SUB1 may be referred to as a main PI substrate, and the second substrate SUB2 may be referred to as a secondary PI substrate.

[0069] Reference Figure 2 Various patterns (ACT, SD1, GATE), various insulating films (MBUF, ABUF1, ABUF2, GI, ILD1, ILD2, PAS0) and various metal patterns (TM, GM, ML1, ML2) may be provided on the substrate SUB. However, the embodiments of the present disclosure are not limited thereto.

[0070] Reference Figure 2 , a multi-buffer layer MBUF may be disposed on the second substrate SUB2 , and a first active buffer layer ABUF1 may be disposed on the multi-buffer layer MBUF.

[0071] A first metal layer ML1 and a second metal layer ML2 may be disposed on the first active buffer layer ABUF1. Here, the first metal layer ML1 and the second metal layer ML2 may be light shielding layers LS for shielding light.

[0072] The gate insulating film GI may be provided while covering the active layer ACT.

[0073] The gate GATE of the driving transistor DRT may be disposed on the gate insulating film GI. In this case, the gate material layer GM may be disposed on the gate insulating film GI together with the gate GATE of the driving transistor DRT at a position different from the formation position of the driving transistor DRT.

[0074] The first interlayer insulating film ILD1 may be provided to cover the gate GATE and the gate material layer GM. The metal pattern TM may be provided on the first interlayer insulating film ILD1. The metal pattern TM may be located at a position different from the formation position of the driving transistor DRT. The second interlayer insulating film ILD2 may be provided while covering the metal pattern TM on the first interlayer insulating film ILD1.

[0075] Two first source drain patterns SD1 may be disposed on the second interlayer insulating film ILD2. One of the two first source drain patterns SD1 may be a source node of a driving transistor (DRT), and the other of the two first source drain patterns SD1 may be a drain node of the driving transistor DRT.

[0076] The two first source drain patterns SD1 may be electrically connected to one side and the other side of the active layer ACT through contact holes in the second interlayer insulating film ILD2 , the first interlayer insulating film ILD1 , and the gate insulating film GI.

[0077] A portion of the active layer ACT overlapping the gate GATE may be a channel region. One of the two first source drain patterns SD1 may be connected to one side of the channel region in the active layer ACT, and the other of the two first source drain patterns SD1 may be connected to the other side of the channel region in the active layer ACT.

[0078] The passivation layer PAS0 may be disposed while covering the two first source drain patterns SD1. The planarization layer PLN may be disposed on the passivation layer PAS0. The planarization layer PLN may include a first planarization layer PLN1 and a second planarization layer PLN2.

[0079] The first planarization layer PLN1 may be disposed on the passivation layer PAS0 .

[0080] The second source-drain pattern SD2 may be disposed on the first planarization layer PLN1. The second source-drain pattern SD2 may be connected to one of the two first source-drain patterns SD1 (with the first planarization layer PLN1) through a contact hole of the first planarization layer PLN1. Figure 3 The second node Ny of the driving transistor DRT in the sub-pixel SP corresponds to the second node Ny of the driving transistor DRT in the sub-pixel SP.

[0081] The second planarization layer PLN2 may be disposed while covering the second source drain pattern SD2. The light emitting device ED may be disposed on the second planarization layer PLN2.

[0082] As an example of a stacked structure of the light emitting device ED, the anode electrode AE ​​may be disposed on the second planarization layer PLN2. The anode electrode AE ​​may be electrically connected to the second source drain pattern SD2 through a contact hole in the second planarization layer PLN2.

[0083] The bank BANK may be provided while covering a portion of the anode electrode AE. A portion of the bank BANK corresponding to the light emitting region or the emission area EA of the sub-pixel SP may be opened.

[0084] A portion of the anode electrode AE ​​may be exposed through the opening (i.e., the opening portion) of the bank BANK. The light emitting layer 307 (EL) of the light emitting device ED may be located on the side of the bank BANK and the opening (i.e., the opening portion) of the bank BANK. All or part of the light emitting layer 307 (EL) may be located between adjacent banks BANK.

[0085] At the opening of the bank BANK, the light emitting layer 307 (EL) may be in contact with the anode electrode AE. The cathode electrode CE may be provided on the light emitting layer 307 (EL).

[0086] The light emitting device ED may be formed of an anode electrode AE, a light emitting layer 307 (EL), and a cathode electrode CE. The light emitting layer 307 (EL) may include an organic layer.

[0087] The encapsulation layer ENCAP may be disposed on the light emitting device ED. The encapsulation layer ENCAP may have a single-layer structure or a multi-layer structure. Figure 2 and Figure 5 As shown, the encapsulation layer ENCAP may include a first encapsulation layer PAS1, a second encapsulation layer PCL, and a third encapsulation layer PAS2. For example, the first encapsulation layer PAS1 and the third encapsulation layer PAS2 may be inorganic layers, and the second encapsulation layer PCL may be an organic layer. Among the first encapsulation layer PAS1, the second encapsulation layer PCL, and the third encapsulation layer PAS2, the second encapsulation layer PCL may be the thickest and may be used as a planarization layer.

[0088] The first encapsulation layer PAS1 may be disposed on the cathode electrode CE and disposed closest to the light emitting device ED. The first encapsulation layer PAS1 may be formed of an inorganic insulating material capable of low temperature deposition. For example, the first encapsulation layer PAS1 may be silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al 2 O 3 Since the first encapsulation layer PAS1 is deposited in a low temperature atmosphere during the deposition process, the first encapsulation layer PAS1 can reduce or prevent damage to the light emitting layer 307 (EL) including an organic substance susceptible to a high temperature atmosphere.

[0089] The second encapsulation layer PCL may be formed to have a smaller area than the first encapsulation layer PAS1. In this case, the second encapsulation layer PCL may be formed to expose both ends of the first encapsulation layer PAS1. The second encapsulation layer PCL may be used as a buffer layer to relieve stress between layers caused by bending of the display device 100, and may also be used to enhance planarization performance. For example, the second encapsulation layer PCL may be an acrylic resin, an epoxy resin, a polyimide, a polyethylene, or a silicon oxycarbide (SiOC), and may be formed of an organic insulating material. However, the embodiments of the present disclosure are not limited thereto. For example, the second encapsulation layer PCL may be formed using an inkjet method. However, the embodiments of the present disclosure are not limited thereto.

[0090] The third encapsulation layer PAS2 may be formed to cover the upper and side surfaces of the first encapsulation layer PAS1 and the second encapsulation layer PCL on the substrate SUB on which the second encapsulation layer PCL is formed. The third encapsulation layer PAS2 may reduce or minimize or block external moisture or oxygen from penetrating into the first encapsulation layer PAS1 and the second encapsulation layer PCL. For example, the third encapsulation layer PAS2 may be made of a material such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or aluminum oxide (Al 2 O 3 ) or the like. However, the embodiments of the present disclosure are not limited thereto.

[0091] Reference Figure 2 When the touch sensor TS is a type built in the display panel 110, the touch sensor TS may be disposed on the encapsulation layer ENCAP. The touch sensor structure is described in detail as follows.

[0092] The touch buffer film T-BUF may be disposed on the encapsulation layer ENCAP, and the touch sensor TS may be disposed on the touch buffer film T-BUF.

[0093] The touch sensor TS may include a touch sensor metal TSM and a bridge metal BRG located at different layers. The touch interlayer insulating film T-ILD may be disposed between the touch sensor metal TSM and the bridge metal BRG. For example, the touch sensor metal TSM may include a first touch sensor metal, a second touch sensor metal, and a third touch sensor metal arranged adjacent to each other. If the third touch sensor metal TSM is located between the first touch sensor metal and the second touch sensor metal that need to be electrically connected to each other, the first touch sensor metal and the second touch sensor metal may be electrically connected to each other through the bridge metal BRG located on another layer. The bridge metal BRG may be insulated from the third touch sensor metal by the touch interlayer insulating film T-ILD.

[0094] When the touch sensor TS is formed on the display panel 110, chemicals (developer or etchant, etc.) used in the process or moisture from the outside may exist thereon. By placing the touch sensor TS on the touch buffer film T-BUF, the penetration of chemicals or moisture into the light emitting layer 307 (EL) including organic materials during the manufacturing process of the touch sensor TS can be reduced or prevented. Therefore, the touch buffer film T-BUF can reduce or prevent damage to the light emitting layer 307 (EL) that is susceptible to chemicals or moisture.

[0095] In order to reduce or prevent damage to the light emitting layer 307 (EL) including an organic material susceptible to high temperature, the touch buffer film T-BUF may be formed at a low temperature below a specific temperature (e.g., 100 degrees Celsius) and may be made of an organic insulating material having a low dielectric constant of 1 to 3. For example, the touch buffer film T-BUF may be formed of an acrylic-based material, an epoxy-based material, or a siloxane-based material. As the display device 100 is bent, the encapsulation layer ENCAP may be damaged and the touch sensor metal located on the touch buffer film T-BUF may be damaged. Even if the display device 100 is bent, the touch buffer film T-BUF made of an organic insulating material and having a planarization property can reduce or prevent damage to the encapsulation layer ENCAP and / or cracking of the metal (touch sensor metal TSM and bridge metal BRG) constituting the touch sensor TS.

[0096] The protection layer PAC may be disposed on the display panel 110 while covering the touch sensor TS. The protection layer PAC may be an organic insulating film. However, the embodiments of the present disclosure are not limited thereto.

[0097] Figure 3 is a cross-sectional view of a light emitting device ED according to an embodiment of the present disclosure. Figure 4 is a diagram illustrating a state in which the display device 100 no longer has a Lambertian distribution with respect to the viewing angle.

[0098] Reference Figure 3 The light-emitting device ED may include an anode 301, a hole injection layer 303 arranged on the anode 301, a hole transport layer 304 arranged on the hole injection layer 303, a light-emitting layer 307 arranged on the hole transport layer 304, an electron transport layer 306 arranged on the light-emitting layer 307, an electron injection layer 305 arranged on the electron transport layer 306, and a cathode 302 arranged on the electron injection layer 305.

[0099] Light self-emitted from the light emitting layer 307 may pass through various components of the display device 100 and exit from the display device 100. However, among the light emitted from the light emitting layer 307, there may be light that does not exit from the display device 100 and is trapped inside the display device 100. In this case, since there are interfaces with different refractive indexes on the light emitting surface of the light emitting device ED, reflection, absorption, scattering, and refraction may occur, which may reduce light efficiency and cause light efficiency limitations on the front and side surfaces of the display device 100.

[0100] In order to solve this light efficiency limitation, a method of improving light efficiency by changing the thickness and refractive index of components placed in the light emitting device ED or adding a light emitting layer 307 to generate a strong microcavity effect in the light emitting device ED may be used. Figure 4 When the thickness and refractive index of the light emitting layer 307 are changed or other components are modified to induce a strong microcavity effect, the microcavity effect becomes stronger, so that the color of the emitted light may change depending on the viewing angle, and contrary to the Lambertian distribution like in Case 1, the emitted light may not have a linear distribution like that of the case 1 due to the rectilinear characteristics. Figure 4 Here, the strong microcavity may refer to a state in which the light intensity is increased while narrowing the half width of the main peak wavelength. The use of a strong microcavity can improve the front light efficiency and color purity, but there may be a trade-off relationship in which the light efficiency at the viewing angle is reduced and a significant color change occurs depending on the viewing angle.

[0101] Therefore, embodiments of the present disclosure may provide a display device with a wider viewing angle that can solve the above-mentioned problems.

[0102] Embodiments of the present disclosure may provide a display device capable of increasing front brightness.

[0103] Embodiments of the present disclosure can provide a display device capable of achieving low power consumption by improving viewing angle characteristics. This will be explained in detail below.

[0104] Figure 5 is a cross-sectional view of a light emitting region in a display panel region according to an embodiment of the present disclosure.

[0105] The display device 100 may include a substrate SUB, an inclined electrode SD2 disposed on the substrate SUB to have an inclined slope on an upper surface, an anode electrode AE ​​disposed to overlap the inclined electrode SD2, a light emitting layer 307 disposed to overlap the anode electrode AE, and a cathode electrode CE disposed to overlap the light emitting layer 307.

[0106] The display device 100 may further include an organic film planarization layer disposed between the oblique electrode SD2 and the anode electrode AE ​​and including a contact hole. The oblique electrode SD2 may contact the anode electrode AE ​​through the contact hole in the organic film planarization layer.

[0107] The display device 100 may further include a driving transistor DRT disposed between the substrate SUB and the oblique electrode SD2 , and the oblique electrode SD2 may be a pattern electrically connected to the driving transistor DRT.

[0108] The second source drain may be disposed on the first planarization layer PLN1. The second source drain may be referred to as an inclined electrode SD2. The second source drain may be an inclined electrode SD2.

[0109] The area of ​​the tilted electrode SD2 corresponding to the light emitting area EA may be arranged to have a constant tilting slope "a", where "a" may be an angle between 1 degree and 70 degrees. However, the embodiments of the present disclosure are not limited thereto, and an angle greater than 70 degrees but less than 90 degrees may also be employed. In the embodiments of the present disclosure, the tilting slope (or angle) "a" may be measured relative to the upper surface of the tilted electrode SD2 or the upper surface of the first planarization layer PLN1.

[0110] The second planarization layer PLN2 may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode SD2, and the anode electrode AE ​​may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode SD2. The light emitting layer 307 may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode SD2, and the cathode electrode CE may be arranged to have a slope less than or equal to the slope in the region overlapping with the inclined electrode SD2.

[0111] The bank BANK may be provided while covering a portion of the anode electrode AE. A portion of the bank BANK corresponding to the emission area EA of the sub-pixel may be opened.

[0112] The bank BANK may be provided between the anode electrode AE ​​and the light emitting layer 307 .

[0113] A portion of the anode electrode AE ​​may be exposed through the opening (ie, the opening portion) of the bank BANK. The light emitting layer 307 may be located on the side of the bank BANK and on the opening (ie, the opening portion) of the bank BANK. All or part of the light emitting layer 307 may be located between adjacent banks BANK.

[0114] A portion of the anode electrode AE ​​may be exposed through the opening of the bank BANK. The opening may be an opening portion of the bank BANK.

[0115] Light generated in the light emitting layer 307 may be emitted in the direction of the cathode electrode CE.

[0116] At the opening of the bank BANK, the light emitting layer 307 may be in contact with the anode electrode AE, and may be disposed to have a slope less than or equal to an inclined slope of an angle 'a' in a region corresponding to the light emitting area EA.

[0117] The cathode electrode CE may be disposed on the light emitting layer 307. A portion of the cathode electrode CE corresponding to the light emitting area EA may be disposed to have a slope equal to or smaller than the inclined slope.

[0118] The light emitting device ED may be provided by an anode electrode AE, a light emitting layer 307, and a cathode electrode CE. The light emitting layer 307 may include an organic layer. In addition, the anode electrode AE, the light emitting layer 307, and the cathode electrode CE may be provided to have a slope less than or equal to the slope.

[0119] The touch sensor TS may include a metal structure, and the metal structure may be in a mesh form. The mesh metal structure may be arranged to overlap with a bank BANK around a light emitting region in which the light emitting layer 307 emits light.

[0120] The encapsulation layer ENCAP may be disposed on the light emitting device ED. The encapsulation layer ENCAP may have a single-layer structure or a multi-layer structure. Figure 5 As shown, the encapsulation layer ENCAP may include a first encapsulation layer PAS1, a second encapsulation layer PCL, and a third encapsulation layer PAS2. For example, the first encapsulation layer PAS1 and the third encapsulation layer PAS2 may be inorganic layers, and the second encapsulation layer PCL may be an organic layer. Among the first encapsulation layer PAS1, the second encapsulation layer PCL, and the third encapsulation layer PAS2, the second encapsulation layer PCL may be the thickest and may be used as a planarization layer. However, the embodiments of the present disclosure are not limited thereto, and at least one of the first encapsulation layer PAS1 and the third encapsulation layer PAS2 may be thicker than the second encapsulation layer PCL and used as a planarization layer.

[0121] The structure in which the second planarization layer PLN2 , the anode electrode AE, the light emitting layer 307 , and the cathode electrode CE are arranged to have a slope “a” from the inclined electrode SD2 may be planarized to an initial state without being inclined in the corresponding encapsulation layer ENCAP.

[0122] From the inclined electrode SD2, the light emitting layer 307 may be arranged to have a slope "a". Therefore, the light emitting direction may be inclined at a slope "a". When the light emitting direction is vertical, a limitation in brightness degradation may occur due to the microcavity effect. Since the light emitting direction is inclined at a slope "a", a limitation in front brightness degradation due to the microcavity does not occur. In addition, since the light emitting direction is inclined at a slope "a", the viewing angle may be widened.

[0123] The substrate SUB may include normal sub-pixels and tilted sub-pixels.

[0124] The slanted electrode SD2 of the normal sub-pixel may be arranged to be flat.

[0125] The inclined electrode SD2 of the inclined sub-pixel may be arranged to have an inclination slope equal to or less than “a.” However, the embodiments of the present disclosure are not limited thereto, and the inclined electrode SD2 of the inclined sub-pixel may have an inclination slope greater than “a.”

[0126] The oblique sub-pixels may be arranged alternately with the normal sub-pixels. However, the embodiments of the present disclosure are not limited thereto. For example, a series of oblique sub-pixels may be arranged before arranging one or more normal sub-pixels, or vice versa.

[0127] Each opening of the normal sub-pixel may vertically overlap the emission area EA.

[0128] Each opening of the oblique sub-pixel may vertically overlap a portion of the light emitting region, or may overlap a portion of the bank BANK.

[0129] In addition, refer to Figure 5, the inclined electrode SD2 of the inclined sub-pixel may have a single inclined slope equal to or different from "a", but the embodiments of the present disclosure are not limited thereto. For example, the inclined electrode SD2 may have two or more slopes (or angles) different from each other. For example, in addition to the slope (or angle) "a", the inclined electrode SD2 may also have another slope (or another angle) different from the slope (or angle) "a". When two or more slopes are set, the latter slope may be equal to or less than the previous slope, but not necessarily, and the latter slope may be equal to or greater than the previous slope. In addition, the slope (angle) of the inclined electrode SD2 does not have to be constant. In other embodiments of the present disclosure, the surface of the inclined electrode SD2 may be curved so that the curvature of the inclined electrode SD2 bulges toward the encapsulation layer ENCAP. When three or more slopes are set, a series of first slopes, second slopes, and third slopes may be set. In this case, the second slope may be smaller than the first slope and the third slope may be greater than the second slope, or both the second slope and the third slope may be smaller than the first slope, or the third slope may be smaller than the second slope but may be the same as the first slope, but the embodiments of the present disclosure are not limited thereto.

[0130] The inclined electrode SD2 may include a stepped portion at an end portion, and may further include a flat portion extending from the stepped portion. The protrusion of the second planarization layer PLN2 may be located at the stepped portion of the inclined electrode SD2.

[0131] Figure 6 is a layout diagram of a sub-pixel SP according to an embodiment of the present disclosure.

[0132] Reference Figure 6 , the plurality of sub-pixels may include a plurality of red sub-pixels, a plurality of blue sub-pixels, and a plurality of green sub-pixels.

[0133] The plurality of red sub-pixels may include a first red sub-pixel 601 , a second red sub-pixel 602 , a third red sub-pixel 603 , and a fourth red sub-pixel 604 .

[0134] The plurality of sub-pixels may include normal sub-pixels and tilted sub-pixels.

[0135] Each of the first red sub-pixel 601, the second red sub-pixel 602, the third red sub-pixel 603, and the fourth red sub-pixel 604 may be arranged so that the inclined electrode SD2 has an inclined slope "a". However, the embodiments of the present disclosure are not limited thereto, and the first red sub-pixel 601, the second red sub-pixel 602, the third red sub-pixel 603, and the fourth red sub-pixel 604 may be arranged so that the inclined electrode SD2 has an inclined slope different from "a", such as greater than "a" or less than "a".

[0136] In a normal red sub-pixel, the slanted electrode SD2 may be disposed flatly.

[0137] The normal red sub-pixel may be disposed between the first red sub-pixel 601 , the second red sub-pixel 602 , the third red sub-pixel 603 , and the fourth red sub-pixel 604 .

[0138] For example, one of the normal red sub-pixels may be disposed between the first red sub-pixel 601 and the second red sub-pixel 602 .

[0139] For example, one of the normal red sub-pixels may be disposed between the second red sub-pixel 602 and the third red sub-pixel 603 .

[0140] For example, one of the normal red sub-pixels may be disposed between the third red sub-pixel 603 and the fourth red sub-pixel 604 .

[0141] For example, one of the normal red sub-pixels may be disposed between the fourth red sub-pixel 604 and the first red sub-pixel 601 .

[0142] For example, one of the normal red sub-pixels may be disposed between the second red sub-pixel 602 and the fourth red sub-pixel 604 .

[0143] For example, one of the normal red sub-pixels may be disposed between the first red sub-pixel 601 and the third red sub-pixel 603 .

[0144] The first red sub-pixel 601 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the first red sub-pixel 601 has a slope equal to “a” in an upward direction so that the light output direction points to the top based on the front surface of the display panel 110 .

[0145] The second red sub-pixel 602 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the second red sub-pixel 602 has a slope equal to “a” in the right direction so that the light output direction points to the right based on the front surface of the display panel 110 .

[0146] The third red sub-pixel 603 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the third red sub-pixel 603 has a slope equal to “a” in the downward direction so that the light output direction points to the bottom based on the front surface of the display panel 110 .

[0147] The fourth red sub-pixel 604 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the fourth red sub-pixel 604 has a slope equal to “a” in the left direction so that the light output direction points to the left based on the front surface of the display panel 110 .

[0148] Figure 7is a diagram illustrating a red sub-pixel according to an embodiment of the present disclosure.

[0149] Reference Figure 7 In the first red sub-pixel 601, the second red sub-pixel 602, the third red sub-pixel 603 and the fourth red sub-pixel 604, the red light-emitting device ED_R can be set on the anode electrode AE, and the anode electrode AE ​​can be set to have a slope less than or equal to the inclined slope of angle a.

[0150] Figure 8 is a layout diagram of a sub-pixel SP according to an embodiment of the present disclosure.

[0151] Reference Figure 8 , the plurality of sub-pixels may include a plurality of red sub-pixels, a plurality of blue sub-pixels, and a plurality of green sub-pixels.

[0152] The plurality of green sub-pixels may include a first green sub-pixel 801 , a second green sub-pixel 802 , a third green sub-pixel 803 , and a fourth green sub-pixel 804 .

[0153] The plurality of sub-pixels may include normal sub-pixels and tilted sub-pixels.

[0154] Each of the first green sub-pixel 801 , the second green sub-pixel 802 , the third green sub-pixel 803 , and the fourth green sub-pixel 804 may be disposed such that the inclined electrode SD2 has an inclined slope “a”.

[0155] In a normal green sub-pixel, the slanted electrode SD2 may be set to be flat.

[0156] The normal green sub-pixel may be disposed between the first green sub-pixel 801 , the second green sub-pixel 802 , the third green sub-pixel 803 , and the fourth green sub-pixel 804 .

[0157] For example, one of the normal green sub-pixels may be disposed between the first green sub-pixel 801 and the second green sub-pixel 802 .

[0158] For example, one of the normal green sub-pixels may be disposed between the second green sub-pixel 802 and the third green sub-pixel 803 .

[0159] For example, one of the normal green sub-pixels may be disposed between the third green sub-pixel 803 and the fourth green sub-pixel 804 .

[0160] For example, one of the normal green sub-pixels may be disposed between the fourth green sub-pixel 804 and the first green sub-pixel 801 .

[0161] For example, one of the normal green sub-pixels may be disposed between the second green sub-pixel 802 and the fourth green sub-pixel 804 .

[0162] For example, one of the normal green sub-pixels may be disposed between the first green sub-pixel 801 and the third green sub-pixel 803 .

[0163] The first green sub-pixel 801 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the first green sub-pixel 801 has a slope equal to “a” in an upward direction so that the light output direction points to the top based on the front surface of the display panel 110 .

[0164] The second green sub-pixel 802 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the second green sub-pixel 802 has a slope equal to “a” in the right direction so that the light output direction points to the right based on the front surface of the display panel 110 .

[0165] The third green sub-pixel 803 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the third green sub-pixel 803 has a slope equal to “a” in the downward direction so that the light output direction points to the bottom based on the front surface of the display panel 110 .

[0166] The fourth green sub-pixel 804 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the fourth green sub-pixel 804 has a slope equal to “a” in the left direction so that the light output direction points to the left based on the front surface of the display panel 110 .

[0167] Fig. 9 is a diagram illustrating a green sub-pixel according to an embodiment of the present disclosure.

[0168] Reference Fig. 9 In the first green sub-pixel 801, the second green sub-pixel 802, the third green sub-pixel 803 and the fourth green sub-pixel 804, the green light-emitting device ED_G can be set on the anode electrode AE, and the anode electrode AE ​​can be set to have a slope less than or equal to the inclined slope of angle a.

[0169] Fig.10 is a layout diagram of a sub-pixel SP according to an embodiment of the present disclosure.

[0170] Reference Fig.10 , the plurality of sub-pixels may include a plurality of red sub-pixels, a plurality of blue sub-pixels, and a plurality of green sub-pixels.

[0171] The plurality of blue sub-pixels may include a first blue sub-pixel 1001 , a second blue sub-pixel 1002 , a third blue sub-pixel 1003 , and a fourth blue sub-pixel 1004 .

[0172] The plurality of sub-pixels may include normal sub-pixels and tilted sub-pixels.

[0173] Each of the first blue sub-pixel 1001 , the second blue sub-pixel 1002 , the third blue sub-pixel 1003 , and the fourth blue sub-pixel 1004 may be disposed such that the inclined electrode SD2 has an inclined slope “a”.

[0174] In a normal blue sub-pixel, the slanted electrode SD2 may be set to be flat.

[0175] The normal blue sub-pixel may be disposed between the first blue sub-pixel 1001 , the second blue sub-pixel 1002 , the third blue sub-pixel 1003 , and the fourth blue sub-pixel 1004 .

[0176] For example, one of the normal blue sub-pixels may be disposed between the first blue sub-pixel 1001 and the second blue sub-pixel 1002 .

[0177] For example, one of the normal blue sub-pixels may be disposed between the second blue sub-pixel 1002 and the third blue sub-pixel 1003 .

[0178] For example, one of the normal blue sub-pixels may be disposed between the third blue sub-pixel 1003 and the fourth blue sub-pixel 1004 .

[0179] For example, one of the normal blue sub-pixels may be disposed between the fourth blue sub-pixel 1004 and the first blue sub-pixel 1001 .

[0180] For example, one of the normal blue sub-pixels may be disposed between the second blue sub-pixel 1002 and the fourth blue sub-pixel 1004 .

[0181] For example, one of the normal blue sub-pixels may be disposed between the first blue sub-pixel 1001 and the third blue sub-pixel 1003 .

[0182] The first blue sub-pixel 1001 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the first blue sub-pixel 1001 has a slope equal to “a” in an upward direction so that the light output direction points to the top based on the front surface of the display panel 110 .

[0183] The second blue sub-pixel 1002 may be configured as an inclined sub-pixel, wherein the inclined electrode SD2 of the second blue sub-pixel 1002 has a slope equal to “a” in the right direction so that the light output direction points to the right based on the front surface of the display panel 110 .

[0184] The third blue sub-pixel 1003 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the third blue sub-pixel 1003 has a slope equal to “a” in the downward direction so that the light output direction points to the bottom based on the front surface of the display panel 110 .

[0185] The fourth blue sub-pixel 1004 may be set as an inclined sub-pixel, wherein the inclined electrode SD2 of the fourth blue sub-pixel 1004 has a slope equal to “a” in the left direction so that the light output direction points to the left based on the front surface of the display panel 110 .

[0186] Fig.11 is a diagram illustrating a blue sub-pixel according to an embodiment of the present disclosure.

[0187] Reference Fig.11 In the first blue sub-pixel 1001, the second blue sub-pixel 1002, the third blue sub-pixel 1003 and the fourth blue sub-pixel 1004, the blue light-emitting device ED_B can be set on the anode electrode AE, and the anode electrode AE ​​can be set to have a slope less than or equal to the inclined slope of angle a.

[0188] Fig.12 is a diagram of a display panel 1210 having divided areas according to an embodiment of the present disclosure.

[0189] Reference Fig.12 , the substrate SUB of the display panel 1210 may be divided into a left region (or first region) 1201 and a right region 1202 (or second region). Alternatively, the substrate SUB of the display panel 1210 may be divided into an upper region and a lower region. That is, the substrate SUB of the display panel 1210 may include a first region and a second region inclined in opposite directions. However, the embodiments of the present disclosure are not limited thereto.

[0190] The light emitting layer 307 included in the oblique sub-pixel of the left area 1201 may be arranged to be inclined to the left. Since the light emitting layer 307 included in the oblique sub-pixel of the left area 1201 is arranged to be inclined to the left, the viewing angle may be widened in the left direction of the display panel 1210.

[0191] The light emitting layer 307 included in the oblique sub-pixel of the right area 1202 may be arranged to be inclined rightward. Since the light emitting layer 307 included in the oblique sub-pixel of the right area 1202 is arranged to be inclined rightward, the viewing angle of the display panel 1210 may be widened in the right direction.

[0192] A virtual reference line dividing the left area 1201 and the right area 1202 of the display panel 1210 may be a center line vertically passing through the display panel 1210 , and the display panel 1210 may be divided into the left area 1201 and the right area 1202 based on the corresponding center line.

[0193] In other embodiments of the present disclosure, the virtual reference line dividing the upper and lower areas of the display panel 1210 may be a center line passing through the display panel 1210 in a horizontal direction, and the display panel 1210 may be divided into the upper and lower areas based on the center line.

[0194] Reference Fig.12 In addition to the left area 1201 and the right area 1202, the display panel 1210 may further have a third area between the left area 1201 and the right area 1202. The third area may be an area having a slope different from the slopes of the left area 1201 and the right area 1202. In various embodiments of the present disclosure, the third area may be a flat area or a plane area, or an area having a slope smaller than the slopes of the left area 1201 and the right area 1202. However, the embodiments of the present disclosure are not limited thereto.

[0195] Fig.13 According to the embodiments of the present disclosure Fig.12 A cross-sectional view of the light emitting area in the left area 1201 of the display panel 1210.

[0196] Reference Fig.13 , at least some of the sub-pixels included in the left area 1201 can be arranged so that starting from the inclined electrode SD2, the second planarization layer PLN2 arranged on the inclined electrode SD2, the anode electrode AE ​​arranged on the second planarization layer PLN2, the light-emitting layer 307 arranged on the anode electrode AE, and the cathode electrode CE arranged on the light-emitting layer 307 have a slope less than or equal to the inclined slope toward the left side.

[0197] Reference Fig.13 , when the display panel 110 is divided into a left area 1201 and a right area 1202 , a tilted sub-pixel may be disposed in the left area 1201 of the substrate SUB.

[0198] The inclined electrode SD2 included in the inclined sub-pixel may be arranged to have an inclined slope. The anode electrode AE ​​may be arranged to have a slope less than or equal to the inclined slope on the inclined electrode SD2. The light emitting layer 307 may be arranged to have a slope less than or equal to the inclined slope on the anode electrode AE. The cathode electrode CE may be arranged on the light emitting layer 307 to have a slope equal to or less than the inclined slope.

[0199] Since the light emitting layer 307 is arranged to have a slope equal to or less than a predetermined inclination slope, the direction of light emitted from the light emitting layer 307 may be toward the left side rather than the front. That is, the viewing angle may be widened in the left area 1201 of the display panel 110.

[0200] Fig.14 According to the embodiments of the present disclosure Fig.12 A cross-sectional view of the light emitting area in the right area 1202 of the display panel 1210.

[0201] Reference Fig.14 , at least some of the sub-pixels included in the right area 1202 can be arranged so that starting from the inclined electrode SD2, the second planarization layer PLN2 arranged on the inclined electrode SD2, the anode electrode AE ​​arranged on the second planarization layer PLN2, the light-emitting layer 307 arranged on the anode electrode AE, and the cathode electrode CE arranged on the light-emitting layer 307 have a slope less than or equal to the inclined slope toward the right side.

[0202] like Fig.12 , Fig.13 and Fig.14 As shown, by arranging sub-pixels in different tilt directions according to the left area 1201 and the right area 1202, the effect of widening the left and right viewing angles can be provided in the display panel 1210.

[0203] Fig.15 is a cross-sectional view of a light emitting region of a display panel 1510 divided into regions according to an embodiment of the present disclosure.

[0204] Reference Fig.15 , the substrate SUB of the display panel 1510 may include a first area 1501 , a second area 1502 , a third area 1503 and a fourth area 1504 .

[0205] The light emitting layer 307 included in the oblique sub-pixel of the first region 1501 may be arranged to be inclined in a first direction (eg, upward). Since the light emitting layer 307 included in the oblique sub-pixel of the first region 1501 is arranged to be inclined upward, the viewing angle toward the top of the display panel 1510 may be widened.

[0206] The light emitting layer 307 included in the oblique sub-pixel of the second region 1502 may be arranged to be inclined in the second direction (eg, to the right). Since the light emitting layer 307 included in the oblique sub-pixel of the second region 1502 is arranged to be inclined to the right, the viewing angle of the display panel 1510 in the right direction may be widened.

[0207] The light emitting layer 307 included in the oblique sub-pixel of the third region 1503 may be arranged to be inclined in a third direction (eg, downward). Since the light emitting layer 307 included in the oblique sub-pixel of the third region 1503 is arranged to be inclined downward, the viewing angle of the display panel 1510 in the downward direction may be widened.

[0208] The light emitting layer 307 included in the oblique sub-pixel of the fourth region 1504 may be arranged to be inclined in a fourth direction (e.g., to the left). Since the light emitting layer 307 included in the oblique sub-pixel of the fourth region 1504 is arranged to be inclined to the left, the viewing angle of the display panel 1510 in the left direction may be widened.

[0209] In addition, the display panel 1510 can be divided into finer areas according to the user's usage environment to provide an improved viewing angle.

[0210] Reference Fig.15 , in addition to the first area 1501, the second area 1502, the third area 1503 and the fourth area 1504, the display panel 1510 may further have a fifth area located between any two or all of the first area 1501, the second area 1502, the third area 1503 and the fourth area 1504. The fifth area may be an area whose slope is different from or the same as the slopes of the first area 1501, the second area 1502, the third area 1503 and the fourth area 1504. In various embodiments of the present disclosure, the fifth area may be a flat area or a plane area, or an area whose slope is equal to or less than the slope of at least one of the first area 1501, the second area 1502, the third area 1503 and the fourth area 1504. However, the embodiments of the present disclosure are not limited thereto.

[0211] Fig.16 is a diagram of a display panel 1610 according to an embodiment of the present disclosure.

[0212] The display panel 1610 may include tilted sub-pixels arranged such that each light emitting layer 307 is tilted by an amount of "a" in a random direction in some or all regions.

[0213] In at least some sub-pixels of the display panel 1610, each light emitting layer 307 is arranged to be inclined at "a" in a random direction, so that the viewing angle can be uniformly widened.

[0214] The sub-pixels including the light emitting layer 307 tilted at “a” may be differently arranged depending on the type of the display panel 110 .

[0215] Fig.17 is a diagram of an edge region of a display panel 1710 according to an embodiment of the present disclosure.

[0216] Fig.17The illustrated display panel 1710 may be a display panel 1710 in which an edge region is curved by applying a curvature to the edge region.

[0217] In the display panel 1710 , the direction of light may leak to one side in a corner region where the curvature is applied, so that the brightness recognized by a front user may be reduced.

[0218] Fig.18 and Fig.19 is a diagram of an edge region of a display panel 1710 according to an embodiment of the present disclosure.

[0219] The display panel 1710 may include a flat region 1705 and an edge region which is an outer region of the flat region 1705. The light emitting layer 307 of the oblique sub-pixel disposed in the edge region may be disposed to have a slope less than or equal to the oblique slope.

[0220] The substrate (not shown) of the display panel 1710 may include a flat region 1705 and an edge region as an outer region of the flat region 1705. The light emitting layer 307 of the oblique sub-pixel disposed in the edge region may be disposed to have a slope less than or equal to the oblique slope.

[0221] Reference Fig.18 and Fig.19 , the display panel 1710 may include an edge region disposed at a corner of the flat region 1705 having no curvature. The display panel 1710 may be curved by applying a curvature to the edge region at the corner.

[0222] The display panel 1710 may include a first edge region 1701 as an upper edge region, a second edge region 1702 as a right edge region, a third edge region 1703 as a lower edge region, and a fourth edge region 1704 as a left edge region.

[0223] The light emitting layer 307 included in the oblique sub-pixel of the first edge region 1701 of the display panel 1710 may be arranged to be inclined in the first direction. Since the light emitting layer 307 included in the oblique sub-pixel of the first edge region 1701 is arranged to be inclined in the first direction, the visibility of the user located in front of the display panel 1710 may be improved.

[0224] The light emitting layer 307 included in the oblique sub-pixel of the second edge region 1702 of the display panel 1710 may be arranged to be inclined in the second direction. Since the light emitting layer 307 included in the oblique sub-pixel of the second edge region 1702 is arranged to be inclined in the second direction, the visibility of the user located in front of the display panel 1710 may be improved.

[0225] The light emitting layer 307 included in the oblique sub-pixel of the third edge region 1703 of the display panel 1710 may be arranged to be inclined in the third direction. Since the light emitting layer 307 included in the oblique sub-pixel of the third edge region 1703 is arranged to be inclined in the third direction, the visibility of the user located in front of the display panel 1710 may be improved.

[0226] The light emitting layer 307 included in the oblique sub-pixel of the fourth edge region 1704 of the display panel 1710 may be arranged to be inclined in a fourth direction (e.g., to the left). Since the light emitting layer 307 included in the oblique sub-pixel of the fourth edge region 1704 is arranged to be inclined in the fourth direction, visibility of a user located in front of the display panel 1710 may be improved.

[0227] The substrate SUB of the display panel 2010 may have a specific curvature. The normal sub-pixel may be disposed at the center of the substrate SUB. The tilted sub-pixel may be disposed in a region other than the center of the substrate SUB.

[0228] Fig. 20 and Fig.21 is a diagram of a display panel 2010 according to an embodiment of the present disclosure.

[0229] In the case of a conventional curved display panel 2010 in which the entire area of ​​the display panel 2010 applies curvature, since the display panel 2010 is curved, the direction of light from the sub-pixels may be concentrated on one point, which may make it difficult to ensure a wide viewing angle.

[0230] The tilt sub-pixel can be set at Fig.21 The slope of the inclined sub-pixel may be set so that the directions of light emitted from the curved display panel 2010 are parallel, thereby ensuring a wide viewing angle of the display panel 2010. For example, light paths 2011, 2012, 2013, 2014, 2015, 2016, and 2017 may be generated based on the respective angles of the inclined electrode AE1, and the respective angles of the inclined electrode AE1 of the light paths 2011, 2012, 2013, 2014, 2015, 2016, and 2017 may be adjusted respectively and may be the same or different from each other to provide parallel light beams or light paths.

[0231] The above-mentioned embodiments of the present disclosure are briefly described as follows.

[0232] A display device according to an embodiment of the present disclosure may include: a substrate; an inclined electrode, which is arranged on the substrate and is arranged so that the upper surface has an inclined slope; a pixel electrode, which is arranged to overlap with the inclined electrode; a light-emitting layer, which is arranged to overlap with the pixel electrode; and a cathode, which is arranged to overlap with the light-emitting layer.

[0233] The display device according to an embodiment of the present disclosure may further include an organic film planarization layer disposed between the oblique electrode and the pixel electrode and including a contact hole, and the oblique electrode may contact the pixel electrode through the contact hole in the organic film planarization layer.

[0234] The display device according to the embodiment of the present disclosure may further include a driving transistor disposed between the substrate and the inclined electrode, and the inclined electrode may be an electrode included in the driving transistor or a pattern electrically connected to the driving transistor.

[0235] The organic film planarization layer can be set to have a slope less than or equal to the inclined slope in the area overlapping with the inclined electrode, the pixel electrode can be set to have a slope less than or equal to the inclined slope in the area overlapping with the inclined electrode, the light-emitting layer can be set to have a slope less than or equal to the inclined slope in the area overlapping with the inclined electrode, and the cathode can be set to have a slope less than or equal to the inclined slope in the area overlapping with the inclined electrode.

[0236] Light generated in the light-emitting layer may be emitted in the direction of the cathode.

[0237] The incline slope can be from 1 degree to 70 degrees.

[0238] The substrate may include a normal sub-pixel and an inclined sub-pixel. The inclined electrode of the normal sub-pixel may be arranged flatly, and the inclined electrode of the inclined sub-pixel may be arranged such that an upper surface thereof has an inclined slope.

[0239] The oblique sub-pixels may be arranged alternately with the normal sub-pixels.

[0240] The substrate may include a left region and a right region. The light emitting layer included in the oblique sub-pixel of the left region may be arranged to be inclined to the left, and the light emitting layer included in the oblique sub-pixel of the right region may be arranged to be inclined to the right.

[0241] The substrate may include a first region, a second region, a third region, and a fourth region. The light emitting layer included in the tilted sub-pixel in the first region may be arranged to be tilted in the first direction, the light emitting layer included in the tilted sub-pixel in the second region may be arranged to be tilted in the second direction, the light emitting layer included in the tilted sub-pixel in the third region may be arranged to be tilted in the third direction, and the light emitting layer included in the tilted sub-pixel in the fourth region may be arranged to be tilted in the fourth direction.

[0242] The substrate may include a flat region and an edge region as an outer region of the flat region. The light emitting layer of the oblique sub-pixel disposed in the edge region may be disposed to have an oblique slope.

[0243] The substrate may have a specific curvature, and normal sub-pixels may be disposed at the center of the substrate, and inclined sub-pixels may be disposed in an area other than the center of the substrate.

[0244] The display device according to an embodiment of the present disclosure may further include: a bank disposed between the light-emitting layer and the pixel electrode; and a touch sensor disposed on the cathode. The touch sensor may include a mesh metal structure, and the metal structure may be disposed to overlap with the bank around the light-emitting area where light generated from the light-emitting layer is emitted.

[0245] Each opening of the normal sub-pixel may overlap perpendicularly with the light-emitting area, and each opening of the inclined sub-pixel may overlap perpendicularly with a part of the light-emitting area or overlap with a part of the bank.

[0246] The above description and the drawings provide examples of the technical concept of the present disclosure for illustrative purposes only. Various modifications, additions, and substitutions to the described embodiments will be apparent to those skilled in the art without departing from the technical concept and scope of the present disclosure. Additionally, the disclosed embodiments are intended to illustrate the scope of the technical concept of the present disclosure. Therefore, the scope of the present disclosure is not limited to the illustrated embodiments.

[0247] Cross-reference to related applications

[0248] This application claims the priority of Korean Patent Application No. 10-2023-0164069, filed in Korea on November 23, 2023, the entire contents of which are hereby incorporated by reference into this application.

Claims

1. A display device, comprising: substrate; An inclined electrode, wherein the inclined electrode is disposed on the substrate and an upper surface of the inclined electrode has an inclined slope; a pixel electrode, the pixel electrode being arranged to overlap with the inclined electrode; a light-emitting layer, the light-emitting layer being arranged to overlap with the pixel electrode; and A cathode is arranged to overlap with the light emitting layer.

2. The display device according to claim 1, further comprising an organic film planarization layer provided between the inclined electrode and the pixel electrode and including a contact hole, in, The inclined electrode contacts the pixel electrode through the contact hole in the organic film planarization layer.

3. The display device according to claim 2, further comprising a driving transistor disposed between the substrate and the inclined electrode, in, The inclined electrode is an electrode included in the driving transistor, or a pattern electrically connected to the driving transistor.

4. The display device according to claim 2, wherein: The organic film planarizing layer has a slope smaller than or equal to the slope slope in a region overlapping with the inclined electrode, The pixel electrode has a slope less than or equal to the slope in a region overlapping with the inclined electrode. wherein the light emitting layer has a slope less than or equal to the slope in a region overlapping with the inclined electrode, and The cathode has a slope less than or equal to the slope in a region overlapping with the inclined electrode.

5. The display device according to claim 4, wherein: Light generated in the light emitting layer is emitted in the direction of the cathode.

6. The display device according to claim 1, wherein: The inclination gradient is in the range of 1 degree to 70 degrees.

7. The display device according to claim 1, wherein: The substrate includes normal sub-pixels and tilted sub-pixels, Wherein, the inclined electrode of the common sub-pixel is flat, and Wherein, the upper surface of the inclined electrode of the inclined sub-pixel has the inclined slope.

8. The display device according to claim 7, wherein: The oblique sub-pixels and the normal sub-pixels are arranged alternately.

9. The display device according to claim 7, wherein: The substrate includes a first region and a second region, The light emitting layer included in the inclined sub-pixel in the first region is arranged to be inclined in a first direction, and the light emitting layer included in the inclined sub-pixel in the second region is arranged to be inclined in a second direction opposite to the first direction.

10. The display device according to claim 7, wherein: The substrate includes a first region, a second region, a third region and a fourth region, The light emitting layer included in the inclined sub-pixel in the first region is inclined along a first direction. The light emitting layer included in the inclined sub-pixel in the second region is inclined along the second direction. The light emitting layer included in the inclined sub-pixel in the third region is inclined along a third direction, and The light emitting layer included in the inclined sub-pixel in the fourth region is inclined along a fourth direction.

11. The display device according to claim 7, wherein: The substrate includes a flat region and an edge region adjacent to the flat region, and Wherein, the light emitting layer of the inclined sub-pixel arranged in the edge area has the inclined slope.

12. The display device according to claim 7, wherein: The substrate has a curvature at its periphery, and The normal sub-pixel is disposed at the center of the substrate, and the tilted sub-pixel is disposed in a region of the substrate other than the center.

13. The display device according to claim 7, further comprising: a bank, the bank being arranged between the light emitting layer and the pixel electrode; as well as a touch sensor, the touch sensor being disposed on the cathode, Wherein, the touch sensor comprises a mesh metal structure, and The metal structure is arranged to overlap the bank around a light emitting region, wherein light generated from the light emitting layer is emitted in the light emitting region.

14. The display device according to claim 13, wherein: Each opening of the metal structure of the normal sub-pixel vertically overlaps the light emitting region, and Each opening of the metal structure of the inclined sub-pixel vertically overlaps with a portion of the light-emitting region or overlaps with a portion of the embankment.

15. The display device according to claim 1, wherein: The inclined electrode includes a plurality of inclined slopes including the inclined slope.

16. The display device according to claim 15, wherein: The plurality of inclined slopes include a first inclined slope and a second inclined slope, and an inclination of the first inclined slope is different from an inclination of the second inclined slope.

17. The display device according to claim 1, wherein: The upper surface of the inclined slope is curved.

18. The display device according to claim 1, wherein: The inclined electrode includes a step portion.

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