Display device

Abstract

A display device includes: a substrate including a first region including a light emitting region and a non-light emitting region; first to third light emitting devices disposed on the substrate in the first region and providing light of different colors to light emitting regions of the first region; a pixel defining layer disposed on the substrate in the non-light emitting area; an encapsulation layer disposed on the first to third light emitting devices; and a light blocking layer disposed in the first region of the encapsulation layer and having light emitting openings corresponding to the first to third light emitting devices, at least one of a first distance between a top surface of a pixel electrode of a first light emitting device and a bottom surface of a light blocking layer and a second distance between a top surface of a pixel electrode of a second light emitting device and a bottom surface of a light blocking layer, and a third distance between a top surface of a pixel electrode of a third light emitting device and a bottom surface of a light blocking layer the separation is different.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a display device that provides visual information. Background Art

[0002] With the development of information technology, the importance of display devices as a communication medium between users and information has become increasingly prominent. For example, the use of display devices such as liquid crystal display devices ("LCD"), organic light emitting display devices ("OLED"), plasma display devices ("PDP"), and quantum dot display devices is increasing. Summary of the Invention

[0003] Technical issues

[0004] An object of the present invention is to provide a display device that facilitates viewing angle adjustment and has improved display quality.

[0005] However, the problems to be solved by the present invention are not limited to the above-mentioned problems and can be expanded in various ways without departing from the spirit and scope of the present invention.

[0006] Technical Solution

[0007] To achieve the purpose of the present invention, a display device according to an embodiment includes: a substrate including a first region including an emission region and a non-emission region; first to third light-emitting elements disposed in the first region, on the substrate, and configured to provide light of different colors to the emission region of the first region; a pixel defining layer disposed in the non-emission region, on the substrate; an encapsulation layer disposed on the first to third light-emitting elements; and a light blocking layer disposed in the first region, on the encapsulation layer, and defining emission openings corresponding to the first to third light-emitting elements. At least one of a first distance from an upper surface of a pixel electrode of the first light-emitting element to a lower surface of the light blocking layer and a second distance from an upper surface of a pixel electrode of the second light-emitting element to a lower surface of the light blocking layer may be different from a third distance from an upper surface of a pixel electrode of the third light-emitting element to a lower surface of the light blocking layer.

[0008] In an embodiment, the third distance may be shorter than each of the first distance and the second distance.

[0009] In an embodiment, the upper surface of the pixel electrode of the first light-emitting element may have a first height from the upper surface of the substrate, the upper surface of the pixel electrode of the second light-emitting element may have a second height from the upper surface of the substrate, the upper surface of the pixel electrode of the third light-emitting element may have a third height from the upper surface of the substrate, and at least one of the first height and the second height may be different from the third height.

[0010] In an embodiment, the third height may be greater than each of the first height and the second height.

[0011] In an embodiment, the display device may further include: a second region of the substrate, including an emission region and a non-emission region; and fourth to sixth light-emitting elements arranged in the second region, on the substrate and configured to provide light of different colors to the emission region of the second region, and the light blocking layer may not be arranged in the second region.

[0012] In an embodiment, each of the upper surfaces of the pixel electrodes of the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element may have a fourth height equal to the third height from the upper surface of the substrate.

[0013] In an embodiment, the pixel defining layer may define a first pixel opening exposing a portion of a pixel electrode of a first light-emitting element, a second pixel opening exposing a portion of a pixel electrode of a second light-emitting element, and a third pixel opening exposing a portion of a pixel electrode of a third light-emitting element, and a planar area of ​​the third pixel opening may be smaller than the planar area of ​​the first pixel opening and each of the planar areas of the second pixel opening.

[0014] In an embodiment, the first light emitting element may be configured to provide red light, the second light emitting element may be configured to provide blue light, and the third light emitting element may be configured to provide green light.

[0015] In an embodiment, the display device may further include: a conductive pattern disposed under the first to third light-emitting elements and in contact with the first to third light-emitting elements; and an insulating layer covering the conductive pattern and defining at least one groove located in the first region, and the pixel electrode of the first light-emitting element and the pixel electrode of the second light-emitting element may be disposed in the groove.

[0016] In an embodiment, a portion of the pixel defining layer may be disposed in the trench.

[0017] In an embodiment, the display device may further include: a conductive pattern disposed under the first to third light-emitting elements and in contact with the first to third light-emitting elements; a first insulating layer covering the conductive pattern; and a second insulating layer disposed on the first insulating layer and defining at least one hole exposing a portion of the first insulating layer in the first region, and the pixel electrode of the first light-emitting element and the pixel electrode of the second light-emitting element may be disposed in the hole.

[0018] In an embodiment, a portion of the pixel defining layer may be disposed in the hole.

[0019] In an embodiment, a display device includes: a substrate including a first region including an emission region and a non-emission region; first to third light-emitting elements disposed in the first region, on the substrate, and configured to provide light of different colors to the emission region of the first region; a pixel defining layer disposed in the non-emission region, on the substrate; an encapsulation layer disposed on the first to third light-emitting elements; and a light-blocking layer disposed in the first region, on the encapsulation layer, and defining emission openings corresponding to the first to third light-emitting elements. A first distance from an upper surface of a pixel electrode of the first light-emitting element to a lower surface of the light-blocking layer, a second distance from an upper surface of a pixel electrode of the second light-emitting element to a lower surface of the light-blocking layer, and a third distance from an upper surface of a pixel electrode of the third light-emitting element to a lower surface of the light-blocking layer are different from each other.

[0020] In an embodiment, the third distance may be shorter than each of the first distance and the second distance, and the second distance may be shorter than the first distance.

[0021] In an embodiment, the upper surface of the pixel electrode of the first light-emitting element may have a first height from the upper surface of the substrate, the upper surface of the pixel electrode of the second light-emitting element may have a second height from the upper surface of the substrate, and the upper surface of the pixel electrode of the third light-emitting element may have a third height from the upper surface of the substrate, and the first height, the second height and the third height may be different from each other.

[0022] In an embodiment, the third height may be greater than each of the first height and the second height, and the second height may be greater than the first height.

[0023] In an embodiment, the pixel defining layer may define a first pixel opening exposing a portion of a pixel electrode of a first light-emitting element, a second pixel opening exposing a portion of a pixel electrode of a second light-emitting element, and a third pixel opening exposing a portion of a pixel electrode of a third light-emitting element, and the planar area of ​​the first pixel opening, the planar area of ​​the second pixel opening, and the planar area of ​​the third pixel opening may be different from each other.

[0024] In an embodiment, the first light emitting element may be configured to provide red light, the second light emitting element may be configured to provide blue light, and the third light emitting element may be configured to provide green light.

[0025] In an embodiment, the display device may further include: a second region of the substrate, including an emission region and a non-emission region; and fourth to sixth light-emitting elements arranged in the second region, on the substrate and configured to provide light of different colors to the emission region of the second region, and the light blocking layer may not be arranged in the second region.

[0026] In an embodiment, the display device may further include: a conductive pattern disposed under the first to third light-emitting elements and in contact with the first to third light-emitting elements; and an insulating layer covering the conductive pattern and defining at least one groove located in the first region, and the pixel electrode of the first light-emitting element and the pixel electrode of the second light-emitting element may be disposed in the groove.

[0027] In an embodiment, a portion of the pixel defining layer may be disposed in the trench.

[0028] Beneficial effects

[0029] The display device according to the embodiment can be operated in a private drive mode that provides a narrow viewing angle in at least some directions. For example, by including a light blocking layer selectively provided in a specific area of ​​the display area, the user's field of view can be narrowed or blocked when viewed from some directions.

[0030] In addition, according to the display device, in the area where the light blocking layer is provided, taking into account the difference in size (plane area) between the pixel openings, the difference between the horizontal height of one pixel electrode and the horizontal height of another pixel electrode can be achieved. Accordingly, the brightness deviation of the display device at each azimuth angle caused by the difference in size (plane area) between the pixel openings can be reduced or prevented. That is, in the private drive mode, the brightness deviation of the display device at each azimuth angle can be reduced or prevented. Accordingly, the display quality of the display device can be improved. In addition, in the private drive mode, the viewing angle can be more easily adjusted. Therefore, the viewing angle adjustment effect can be improved.

[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a block diagram illustrating a display device according to an embodiment.

[0033] Figure 2 According to the embodiment Figure 1 Equivalent circuit diagram of a pixel.

[0034] Figure 3 is a plan view schematically showing a display device according to an embodiment.

[0035] Figure 4 It shows Figure 3 FIG. 1 is a diagram of a driver of a display device.

[0036] Figures 5 to 7 It is schematically shown Figure 3A plan view of a portion of a display area of ​​a display device.

[0037] Figure 8 According to the embodiment of the invention Figure 7 A cross-sectional view taken along line II'.

[0038] Figure 9 According to the embodiment of the invention Figure 7 A cross-sectional view taken along line II-II'.

[0039] Figure 10 According to the embodiment of the invention Figure 7 A cross-sectional view taken along line III-III'.

[0040] Figure 11 According to another embodiment, Figure 7 A cross-sectional view taken along line II'.

[0041] Figure 12 According to another embodiment, Figure 7 A cross-sectional view taken along line II-II'.

[0042] Figure 13 According to another embodiment, Figure 7 A cross-sectional view taken along line III-III'.

[0043] Figure 14 According to yet another embodiment, Figure 7 A cross-sectional view taken along line II'.

[0044] Figure 15 According to yet another embodiment, Figure 7 A cross-sectional view taken along line II-II'.

[0045] Figure 16 According to yet another embodiment, Figure 7 A cross-sectional view taken along line III-III'. DETAILED DESCRIPTION

[0046] For the embodiments of the present invention disclosed above and below, the specific structural or functional description is merely exemplified for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein.

[0047] Since the present invention is susceptible to various changes and forms, specific embodiments will be shown in the drawings and described in detail in the context. However, this is not intended to limit the invention to the specific forms disclosed, and should be understood to include all modifications, equivalents and alternatives included within the spirit and scope of the present invention.

[0048] Terms such as first and second can be used to describe various components, but these components should not be limited by these terms. These terms can be used to distinguish one component from another. For example, a first element can be referred to as a second element, and similarly, a second element can be referred to as a first element without departing from the scope of the present invention.

[0049] It should be understood that when an element is referred to as being "connected" to another element, the element can be directly connected to the other element, or the element can be connected to the other element but other elements can exist between the element and the other element. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no intervening elements. Other expressions describing relationships between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to," should be similarly interpreted.

[0050] The terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. It will be understood that when used in this specification, the terms "comprise" and / or "include" or "contain" and / or "have" specify the presence of the described features, regions, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, parts and / or groups thereof.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with that in the context of the relevant technology, and unless expressly defined in this application, these terms are not to be interpreted in an idealized or overly formal sense.

[0052] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used for the same components, and any repeated detailed description of the same components will be omitted.

[0053] Figure 1 is a block diagram illustrating a display device according to an embodiment.

[0054] refer to Figure 1 , the display device 1 may include a display portion 110 , a scan driver 130 , a data driver 150 , and a controller 170 .

[0055] The display portion 110 may have pixels PX and signal lines capable of applying electric signals to the pixels PX.

[0056] The pixels PX may be repeatedly arranged in a first direction DR1 and a second direction DR2. The signal lines may include scan lines SL extending in the first direction DR1 and data lines DL extending in the second direction DR2. The scan lines SL may be arranged to be spaced apart in the second direction DR2 and may transmit scan signals to the pixels PX. The data lines DL may be arranged to be spaced apart along the first direction DR1 and may transmit data signals to the pixels PX. Each of the pixels PX may be connected to at least one corresponding scan line among the scan lines SL and at least one corresponding data line among the data lines DL.

[0057] A first power supply voltage ELVDD and a second power supply voltage ELVSS may be applied to the pixels PX of the display portion 110. The first power supply voltage ELVDD may be a high-level voltage supplied to the first electrode (pixel electrode or anode) of the light-emitting element included in each of the pixels PX. The second power supply voltage ELVSS may be a low-level voltage supplied to the second electrode (counter electrode or cathode) of the light-emitting element included in each of the pixels PX. The first power supply voltage ELVDD and the second power supply voltage ELVSS may be driving voltages for causing the pixels PX to emit light.

[0058] The scan driver 130 may be connected to the scan lines SL, may generate scan signals in response to a scan control signal provided from the controller 170 , and may sequentially supply the scan signals to the scan lines SL.

[0059] The data driver 150 may be connected to the data lines DL and may generate data signals in response to data control signals provided from the controller 170 , and may sequentially supply the data signals to the data lines DL.

[0060] Hereinafter, the display device according to the embodiment will be described by taking an organic light-emitting display device as an example, but the display device of the present invention is not limited thereto. For another example, the display device of the present invention may be an inorganic light-emitting display or a quantum dot light-emitting display.

[0061] Figure 2 According to the embodiment Figure 1 Equivalent circuit diagram of a pixel.

[0062] refer to Figure 2 The pixel PX may include a light emitting element such as an organic light emitting diode (OLED). The light emitting element may be connected to a pixel circuit PC, and the pixel circuit PC may include a thin film transistor or a capacitor, etc.

[0063] In an embodiment, the pixel circuit PC may include a first transistor T1, a second transistor T2, and a capacitor Cst. Each of the pixels PX may emit, for example, red, green, blue, or white light through an organic light emitting diode OLED. The first transistor T1 and the second transistor T2 may be implemented as thin film transistors.

[0064] The second transistor T2 may be a switching transistor connected to the scan line SL and the data line DL, and may transfer a data signal input from the data line DL to the first transistor T1 in response to a scan signal input from the scan line SL.

[0065] The capacitor Cst may be connected to the second transistor T2 and the driving voltage line PL and may store a voltage corresponding to a difference between a voltage corresponding to a data signal received from the second transistor T2 and a driving voltage (first power supply voltage) ELVDD supplied to the driving voltage line PL.

[0066] The first transistor T1 may be a driving transistor connected to the driving voltage line PL and the capacitor Cst, and may control the driving current Ioled flowing from the driving voltage line PL through the organic light emitting diode OLED in response to a voltage stored in the capacitor Cst.

[0067] The organic light emitting diode OLED may emit light having a specific brightness by the driving current Ioled. A counter electrode of the organic light emitting diode OLED may be supplied with a common voltage (second power supply voltage) ELVSS.

[0068] Figure 2 The pixel circuit PC is shown to include two transistors and one capacitor, but the present invention is not limited thereto. The number of transistors and capacitors may be variously changed according to the design (or embodiment) of the pixel circuit PC.

[0069] Figure 3 is a plan view schematically showing a display device according to an embodiment. Figure 4 It shows Figure 3 1 is a diagram showing a driving direction of a display device. As used herein, a "plan view" is a view in a thickness direction (eg, a third direction DR3) of a substrate of the display device. The third direction DR3 is perpendicular to the first direction DR1 and the second direction DR2.

[0070] refer to Figure 3 and Figure 4 The display device 1 may be divided into a display area DA and a peripheral area PA outside the display area DA. The display area DA may display an image. The peripheral area PA may be a non-display area that does not display an image. The display area DA may be completely surrounded by the peripheral area PA. Various components constituting the display device 1 may be arranged on a substrate (SUB, see Figure 8 Accordingly, the substrate SUB may be regarded as including a display area DA and a peripheral area PA.

[0071] Pixels PX may be arranged in the display area DA. The pixels PX include a plurality of first pixels PX1 for displaying a first color, a plurality of second pixels PX2 for displaying a second color, and a plurality of third pixels PX3 for displaying a third color. In an embodiment, the first pixels PX1 may display red, the second pixels PX2 may display blue, and the third pixels PX3 may display green.

[0072] In the display area DA, pixel groups PG in which a predetermined number of pixels are grouped may be repeatedly arranged in the first direction DR1 and the second direction DR2. In an embodiment, for example, each of the pixel groups PG may include two second pixels PX2, one first pixel PX1, and one third pixel PX3. The pixel group PG may include a first pixel group PG1 and a second pixel group PG2. In the display area DA, the first pixel group PG1 and the second pixel group PG2 may be alternately arranged in the first direction DR1 and the second direction DR2. Accordingly, the display area DA may have a structure in which a first sub-display area SDA1 in which the first pixel group PG1 is arranged and a second sub-display area SDA2 in which the second pixel group PG2 is arranged are repeatedly arranged in the first direction DR1 and the second direction DR2. In this specification, the first sub-display area SDA1 may be referred to as a "first area", and the second sub-display area SDA2 may be referred to as a "second area".

[0073] The first pixel group PG1 and the second pixel group PG2 may have a rectangular shape consisting of two second pixels PX2, one first pixel PX1, and one third pixel PX3. The first pixel group PG1 and the second pixel group PG2 may be just a division of the repeated shape and do not represent a disconnection of components.

[0074] The size (planar area) of the first sub display area SDA1 and the size (planar area) of the second sub display area SDA2 may be the same or different. Figure 3 The case where the size (planar area) of the first sub-display area SDA1 and the size (planar area) of the second sub-display area SDA2 are the same is shown. As used herein, the "planar area" of an object (e.g., a specific area, an opening, etc.) is defined as the area of ​​the object in a plan view.

[0075] In an embodiment, the arrangement of the first pixel PX1 , the second pixel PX2 , and the third pixel PX3 constituting the first pixel group PG1 may be similar to the arrangement of the first pixel PX1 , the second pixel PX2 , and the third pixel PX3 constituting the second pixel group PG2 .

[0076] The size (planar area) of each of the first pixel PX1, the second pixel PX2, and the third pixel PX3 in the first pixel group PG1 may be larger than the size (planar area) of each of the corresponding first pixel PX1, the second pixel PX2, and the third pixel PX3 in the second pixel group PG2. That is, the size (planar area) of each pixel electrode of the first pixel PX1, the second pixel PX2, and the third pixel PX3 in the first pixel group PG1 may be larger than the size (planar area) of each pixel electrode of the first pixel PX1, the second pixel PX2, and the third pixel PX3 in the second pixel group PG2. In an embodiment, for example, the size (planar area) of the pixel electrode of the first pixel PX1 in the first pixel group PG1 may be larger than the size (planar area) of the pixel electrode of the first pixel PX1 in the second pixel group PG2.

[0077] A driving circuit (eg, Figure 1 The scan driver 130, the data driver 150, and the controller 170 shown in FIG may be disposed in the peripheral area PA.

[0078] In an embodiment, the display device 1 can operate in a normal drive mode (first mode) or a private drive mode (second mode). The normal drive mode may be a mode that provides a wide viewing angle in all directions. The private drive mode may be a mode that provides a narrow viewing angle in at least some directions, and the private drive mode may be a mode in which the side field of view is narrowed or blocked compared to the normal drive mode. When the display device 1 is operated in the private drive mode, the viewing angle of other people viewing the display device 1 from the side may be narrowed or blocked. Therefore, the exposure of personal information can be prevented or reduced.

[0079] Controller 170 (see Figure 1 ) can receive a selection signal of a normal driving mode or a private driving mode. Accordingly, the controller 170 can output a control signal to the scan driver 130 (see Figure 1 ) and data driver 150 (see Figure 1 ), so that the display device 1 operates in the normal driving mode or the private driving mode according to the selection signal.

[0080] In the normal driving mode, the first to third pixels PX1 , PX2 , and PX3 of the first and second pixel groups PG1 and PG2 constituting the display area DA may all be selected by the scan signal and may emit light having brightness corresponding to the data signal.

[0081] like Figure 4As shown in FIG, in the private drive mode, the first to third pixels PX1, PX2, and PX3 of the second pixel group PG2 constituting the display area DA may not emit light, and the first to third pixels PX1, PX2, and PX3 constituting the first pixel group PG1 may emit light having a brightness corresponding to the data signal. Here, the non-emission of the pixel may include a case where the pixel is not selected by the scan signal and therefore does not receive the data signal and / or a case where the pixel is selected by the scan signal but receives a black data signal and appears black.

[0082] Figures 5 to 7 It is schematically shown Figure 3 A plan view of a portion of a display area of ​​a display device.

[0083] In an embodiment, for example, Figure 5 It is schematically shown Figure 3 A plan view of the arrangement of pixel electrodes of a display device, Figure 6 It is schematically shown Figure 3 A plan view of an arrangement of pixel defining layers of a display device, and Figure 7 It is schematically shown Figure 3 A plan view of the arrangement of light-emitting elements and light-blocking layers of a display device.

[0084] Figure 8 According to the embodiment of the invention Figure 7 A cross-sectional view taken along line II'. Figure 9 According to the embodiment of the invention Figure 7 A cross-sectional view taken along line II-II'. Figure 10 According to the embodiment of the invention Figure 7 A cross-sectional view taken along line III-III'.

[0085] In an embodiment, for example, Figure 8 The first sub-display area SDA1 is shown Figure 7 The emission area EA corresponding to the first light emitting element LED1, Figure 9 The first sub-display area SDA1 is shown Figure 7 The emission area EA corresponding to the second light emitting element LED2 and the third light emitting element LED3, and Figure 10 The second sub-display area SDA2 is shown Figure 7 The fifth light emitting element LED5 corresponds to the emission area EA. Figure 7 The cross-sectional structure of the fourth light emitting element LED4 and the sixth light emitting element LED6 can be the same as Figure 10 The cross-sectional structure of the fifth light emitting element LED5 shown in FIG. 1 is substantially the same.

[0086] First, refer to Figures 7 to 10The display device 1 may include a substrate SUB, a buffer layer BFR, first to fourth insulating layers IL1, IL2, IL3, and IL4, an active pattern ACT, first to fourth conductive patterns CP1, CP2, CP3, and CP4, first to sixth light-emitting elements LED1, LED2, LED3, LED4, LED5, and LED6, a pixel defining layer PDL, an encapsulation layer ENC, and a light blocking layer LBL. The active pattern ACT and the first to third conductive patterns CP1, CP2, and CP3 may form a transistor TR. Each of the first to sixth light-emitting elements LED1, LED2, LED3, LED4, LED5, and LED6 may include a pixel electrode PE, a light-emitting layer EL, and a common electrode CE.

[0087] The substrate SUB may include a transparent or opaque material. In an embodiment, examples of materials that can be used as the substrate SUB may include glass, quartz, or plastic, etc. These may be used alone or in combination with each other.

[0088] A buffer layer BFR may be provided on the substrate. The buffer layer BFR may prevent impurities such as oxygen and moisture from diffusing into an upper portion of the substrate SUB. The buffer layer BFR may include an inorganic insulating material such as a silicon compound or a metal oxide.

[0089] The active pattern ACT may be disposed on the buffer layer BFR. In an embodiment, the active pattern ACT may include a silicon semiconductor material or an oxide semiconductor material.

[0090] In an embodiment, a first insulating layer IL1 may be disposed on the buffer layer BFR. The first insulating layer IL1 may cover the active pattern ACT. In an embodiment, the first insulating layer IL1 may be arranged in a pattern on the active pattern ACT to expose a portion of the active pattern ACT. In an embodiment, for example, the first insulating layer IL1 may be arranged in a pattern on the active pattern ACT so as to overlap with the first conductive pattern CP1 in a plan view. The first insulating layer IL1 may include an inorganic insulating material.

[0091] The first conductive pattern CP1 may be disposed on the first insulating layer IL1. In an embodiment, the first conductive pattern CP1 may include metal, alloy, conductive metal oxide, transparent conductive material, or the like.

[0092] The second insulating layer IL2 may be disposed on the first insulating layer IL1. In an embodiment, the second insulating layer IL2 may cover the first conductive pattern CP1. The second insulating layer IL2 may include an inorganic insulating material.

[0093] The second conductive pattern CP2 and the third conductive pattern CP3 may be disposed on the second insulating layer IL2. The second conductive pattern CP2 and the third conductive pattern CP3 may be electrically connected to the active pattern ACT through contact holes defined in the second insulating layer IL2. Each of the second conductive pattern CP2 and the third conductive pattern CP3 may include metal, alloy, conductive metal oxide, transparent conductive material, or the like.

[0094] The third insulating layer IL3 may be disposed on the second insulating layer IL2. The third insulating layer IL3 may cover the second conductive pattern CP2 and the third conductive pattern CP3. The third insulating layer IL3 may include an organic insulating material.

[0095] The fourth conductive pattern CP4 may be disposed on the third insulating layer IL3. The fourth conductive pattern CP4 may be electrically connected to the second conductive pattern CP2 or the third conductive pattern CP3 through a contact hole defined in the third insulating layer IL3. The fourth conductive pattern CP4 may include metal, alloy, conductive metal oxide, or transparent conductive material.

[0096] The fourth insulating layer IL4 may be disposed on the third insulating layer IL3. The fourth insulating layer IL4 may cover the fourth conductive pattern CP4. The fourth insulating layer IL4 may include an organic insulating material.

[0097] In an embodiment, the fourth insulating layer IL4 may define at least one trench TRC located in the first sub-display area SDA1. The trench TRC may be defined as a portion in which the fourth insulating layer IL4 is recessed to a specific point. That is, the trench TRC may not expose components below the fourth insulating layer IL4. In an embodiment, for example, after applying a preliminary insulating layer on the third insulating layer IL3 and the fourth conductive pattern CP4, the preliminary insulating layer may be patterned using a halftone mask or the like to form the fourth insulating layer IL4 having the trench TRC. Because the fourth insulating layer IL4 has the trench TRC, the upper surface of the fourth insulating layer IL4 may have a step in the first sub-display area SDA1. That is, due to the trench TRC, the fourth insulating layer IL4 may have a first portion and a second portion with different thicknesses.

[0098] Figures 8 to 10 The configuration, arrangement, and connection structure of the transistor TR and the plurality of insulating layers IL1 , IL2 , IL3 , and IL4 shown in FIG. 1 are merely examples and may be changed in various ways.

[0099] The pixel electrode PE may be disposed on the fourth insulating layer IL4. The pixel electrode PE may contact the fourth conductive pattern CP4 through a contact hole defined in the fourth insulating layer IL4. Accordingly, the pixel electrode PE may be electrically connected to the transistor TR. In embodiments, the pixel electrode PE may include metal, alloy, conductive metal oxide, or transparent conductive material.

[0100] Further references Figure 5 The pixel electrode PE may be disposed in the first and second sub-display areas SDA1 and SDA2 and on the fourth insulating layer IL4. The pixel electrode PE may be disposed in each pixel. Pixel electrodes corresponding to adjacent pixels may be spaced apart from each other.

[0101] like Figure 8 and Figure 9 As shown in FIG, in the first sub-display area SDA1, the pixel electrodes PE of the first and second light-emitting elements LED1 and LED2 may be disposed in the trench TRC of the fourth insulating layer IL4. On the other hand, the pixel electrode PE of the third light-emitting element LED3 may not be disposed in the trench TRC.

[0102] Accordingly, the pixel electrode PE of the third light emitting element LED3 may be disposed at a different level from at least one of the pixel electrode PE of the first light emitting element LED1 and the pixel electrode PE of the second light emitting element LED2 .

[0103] In an embodiment, for example, the pixel electrode PE of the third light-emitting element LED3 can be set at a different horizontal height from the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 can be set at the same horizontal height.

[0104] In other words, the upper surface of the pixel electrode PE of the first light-emitting element LED1 may have a first height H1 from the upper surface of the substrate SUB, the upper surface of the pixel electrode PE of the second light-emitting element LED2 may have a second height H2 equal to the first height H1 from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the third light-emitting element LED3 may have a third height H3 different from the first height H1 and the second height H2 from the upper surface of the substrate SUB.

[0105] In an embodiment, for example, in the first sub-display area SDA1, the pixel electrode PE of the third light-emitting element LED3 may be disposed at a higher level than the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2. In other words, the upper surface of the pixel electrode PE of the third light-emitting element LED3 may have a third height H3 from the upper surface of the substrate SUB that is higher than the first height H1 and the second height H2.

[0106] However, the present invention is not necessarily limited to this. In an embodiment, if the pixel electrode PE of the third light-emitting element LED3 is set at a different horizontal height from at least one of the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2, then the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 can be set at different horizontal heights from each other.

[0107] That is, in the embodiment, if the upper surface of the pixel electrode PE of the third light emitting element LED3 has a third height H3 different from the first height H1 and the second height H2 from the upper surface of the substrate SUB, the first height H1 and the second height H2 may be different from each other.

[0108] like Figure 10 As shown in FIG, in the second sub-display area SDA2, the pixel electrode PE of the fifth light-emitting element LED5 may not be disposed in the groove TRC. Although not shown, the pixel electrode PE of the fourth light-emitting element LED4 and the pixel electrode PE of the sixth light-emitting element LED6 may also not be disposed in the groove TRC. That is, since the groove TRC is not defined in the second sub-display area SDA2, the pixel electrode PE may not be disposed in the groove TRC in the second sub-display area SDA2.

[0109] Accordingly, the pixel electrode PE of the fifth light-emitting element LED5 may be disposed at the same level as the pixel electrode PE of the third light-emitting element LED3. In other words, the upper surface of the pixel electrode PE of the fifth light-emitting element LED5 may have a fourth height H4 from the upper surface of the substrate SUB that is equal to the third height H3.

[0110] Although not shown, the pixel electrode PE of the fourth light-emitting element LED4 and the pixel electrode PE of the sixth light-emitting element LED6 may also be arranged at the same horizontal height as the pixel electrode PE of the third light-emitting element LED3. That is, the upper surface of the pixel electrode PE of the fourth light-emitting element LED4 may have a fourth height H4 equal to the third height H3 from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the sixth light-emitting element LED6 may have a fourth height H4 equal to the third height H3 from the upper surface of the substrate SUB.

[0111] The pixel defining layer (PDL) may be disposed on the fourth insulating layer IL4 and the pixel electrode PE. The pixel defining layer (PDL) may include an organic insulating material. In an embodiment, the pixel defining layer (PDL) may further include a light blocking material. Examples of the light blocking material of the pixel defining layer (PDL) may include black pigment or black dye.

[0112] Further references Figure 6 , the pixel defining layer PDL may expose a portion of the pixel electrode PE of each of the first to third light emitting elements LED1 , LED2 , and LED3 in the first sub display area SDA1 .

[0113] Specifically, the pixel defining layer PDL may have a first pixel opening POP1 that exposes a portion of the pixel electrode PE of the first light-emitting element LED1, a second pixel opening POP2 that exposes a portion of the pixel electrode PE of the second light-emitting element LED2, and a third pixel opening POP3 that exposes a portion of the pixel electrode PE of the third light-emitting element LED3. In an embodiment, for example, the first to third pixel openings POP1, POP2, and POP3 may expose multiple portions of the corresponding pixel electrodes PE.

[0114] In an embodiment, the size (planar area) of the third pixel opening POP3 may be smaller than each of the size (planar area) of the first pixel opening POP1 and the size (planar area) of the second pixel opening POP2. The size (planar area) of the first pixel opening POP1 may be smaller than the size (planar area) of the second pixel opening POP2.

[0115] The pixel defining layer PDL may cover edges of the pixel electrodes PE of the fourth to sixth light emitting elements LED4 , LED5 , and LED6 in the second sub display area SDA2 and may expose portions of the corresponding pixel electrodes PE.

[0116] Specifically, the pixel defining layer PDL may have a fourth pixel opening POP4 exposing a portion of the pixel electrode PE of the fourth light emitting element LED4, a fifth pixel opening POP5 exposing a portion of the pixel electrode PE of the fifth light emitting element LED5, and a sixth pixel opening POP6 exposing a portion of the pixel electrode PE of the sixth light emitting element LED6.

[0117] In an embodiment, the size (planar area) of the sixth pixel opening POP6 may be smaller than each of the size (planar area) of the fourth pixel opening POP4 and the size (planar area) of the fifth pixel opening POP5. The size (planar area) of the fourth pixel opening POP4 may be smaller than the size (planar area) of the fifth pixel opening POP5.

[0118] The emission area EA may be defined by the pixel openings POP1, POP2, POP3, POP4, POP5, and POP6 of the pixel defining layer PDL. That is, the pixel defining layer PDL may be disposed in the non-emission area NEA surrounding the emission area EA. Figures 8 to 16 As shown in , the non-emission area NEA may be defined by a pixel defining layer PDL.

[0119] In an embodiment, a portion of the pixel defining layer PDL may be disposed in the trench TRC. Figure 8 and Figure 9 As shown in FIG, a portion of the pixel defining layer PDL may cover an edge of the trench TRC.

[0120] The light emitting layer EL may be provided in the pixel openings POP1, POP2, POP3, POP4, POP5, and POP6 of the pixel defining layer PDL. Figure 8 and Figure 9 As shown in FIG, in the first sub display area SDA1, the light emitting layer EL may be disposed on the pixel defining layer PDL dividing one pixel electrode into a plurality of parts.

[0121] In an embodiment, the light-emitting layer EL may include a luminescent material. In an embodiment, for example, the light-emitting layer EL may include an organic light-emitting material. In an embodiment, the light-emitting layer EL of the first light-emitting element LED1 and the light-emitting layer EL of the fourth light-emitting element LED4 may include a material capable of emitting red light, the light-emitting layer EL of the second light-emitting element LED2 and the light-emitting layer EL of the fifth light-emitting element LED5 may include a material capable of emitting blue light, and the light-emitting layer EL of the third light-emitting element LED3 and the light-emitting layer EL of the sixth light-emitting element LED6 may include a material capable of emitting green light. However, the present invention is not necessarily limited to this.

[0122] Functional layers such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer may be additionally provided on and / or under the light emitting layer EL.

[0123] The common electrode CE may be disposed on the light emitting layer EL. The common electrode CE may include a conductive material such as metal, alloy, conductive metal nitride, conductive metal oxide, or transparent conductive material. In an embodiment, the common electrode CE may continuously extend across a plurality of pixels.

[0124] The pixel electrode PE, the light-emitting layer EL, and the common electrode CE may form first to sixth light-emitting elements LED1, LED2, LED3, LED4, LED5, and LED6. The first to third light-emitting elements LED1, LED2, and LED3 may be disposed in the first sub-display area SDA1 and may provide light of different colors to the emission area EA of the first sub-display area SDA1. The fourth to sixth light-emitting elements LED4, LED5, and LED6 may be disposed in the second sub-display area SDA2 and may provide light of different colors to the emission area EA of the second sub-display area SDA2.

[0125] In the embodiment, for example, the first light-emitting element LED1 and the fourth light-emitting element LED4 may provide red light to the emission area EA, the second light-emitting element LED2 and the fifth light-emitting element LED5 may provide blue light to the emission area EA, and the third light-emitting element LED3 and the sixth light-emitting element LED6 may provide green light to the emission area EA. However, the present invention is not necessarily limited thereto.

[0126] The encapsulation layer ENC may be provided on the first to sixth light-emitting elements LED1, LED2, LED3, LED4, LED5, and LED6. The encapsulation layer ENC may protect the first to sixth light-emitting elements LED1, LED2, LED3, LED4, LED5, and LED6 from external moisture, heat, shock, etc. Although not shown, the encapsulation layer ENC may include a first inorganic encapsulation layer, an organic encapsulation layer provided on the first inorganic encapsulation layer, and a second inorganic encapsulation layer provided on the organic encapsulation layer.

[0127] The light blocking layer LBL may be disposed on the encapsulation layer ENC. Figure 7 As shown in , the light blocking layer LBL may not be provided in the second sub-display area SDA2, but may be provided only in the first sub-display area SDA1. The light blocking layer LBL may define an emission opening LOP corresponding to the emission area EA of the first sub-display area SDA1. In a plan view, the emission opening LOP of the light blocking layer LBL may overlap with the first to third pixel openings POP1, POP2, and POP3 of the pixel defining layer PDL.

[0128] like Figures 7 to 9 As shown in FIG, the size (planar area) of the emission opening LOP of the light blocking layer LBL may be larger than the size (planar area) of the first pixel opening POP1 and the size (planar area) of the third pixel opening POP3. In addition, the size (planar area) of the emission opening LOP of the light blocking layer LBL may be substantially the same as the size (planar area) of the second pixel opening POP2.

[0129] In an embodiment, for example, Figure 8 As shown in , the edge of the emission opening LOP corresponding to the first pixel opening POP1 and the edge of the first pixel opening POP1 may be spaced apart by a first separation distance SL1. Figure 9 As shown in FIG, an edge of the emission opening LOP corresponding to the third pixel opening POP3 and an edge of the third pixel opening POP3 may be spaced apart by a second separation distance SL2. In addition, an edge of the emission opening LOP corresponding to the second pixel opening POP2 may substantially coincide with an edge of the second pixel opening POP2.

[0130] In the first sub-display area SDA1, the light blocking layer LBL can block and / or change the path of light emitted from the light-emitting elements disposed in the first sub-display area SDA1 that propagates in directions other than the third direction DR3. Accordingly, the light blocking layer LBL can guide the light emitted from the light-emitting elements disposed in the first sub-display area SDA1 in the third direction DR3. Accordingly, in the private drive mode, the user's field of view may be narrowed or blocked depending on the azimuth angle of the display device 1 (for example, when viewing the display device 1 obliquely from the left, right, top, or bottom sides).

[0131] At least one of the first distance d1 from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL and the second distance d2 from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL may be different from the third distance d3 from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL.

[0132] In an embodiment, for example, Figure 8 and Figure 9 As shown in , a first distance d1 from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL may be equal to a second distance d2 from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL. In addition, a third distance d3 from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL may be different from the first distance d1 and the second distance d2.

[0133] In the embodiment, for example, since the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 are disposed in the trench TRC of the fourth insulating layer IL4, and the pixel electrode PE of the third light-emitting element LED3 is not disposed in the trench TRC, the pixel electrode PE of the third light-emitting element LED3 may be disposed at a higher level than the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2. Accordingly, a third distance d3 from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL may be shorter than a first distance d1 from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL and a second distance d2 from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL.

[0134] However, the present invention is not necessarily limited thereto, and in an embodiment, if the third distance d3 is different from the first distance d1 and the second distance d2, the first distance d1 and the second distance d2 may be different from each other.

[0135] Although not shown, a separate functional layer may be further provided between the encapsulation layer ENC and the light blocking layer LBL. In an embodiment, for example, the functional layer may include a sensing layer for detecting a user's touch, etc. The sensing layer may include at least one touch electrode and at least one touch insulating layer.

[0136] According to an embodiment, in the first sub-display area SDA1 provided with the light blocking layer LBL, the pixel electrode PE of the first light-emitting element LED1, the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the third light-emitting element LED3 may not all be arranged at the same level. In other words, at least one of the pixel electrode PE of the first light-emitting element LED1, the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the third light-emitting element LED3 may be arranged at a different level from the other pixel electrodes PE.

[0137] Accordingly, the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL, the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL, and the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL may not all be the same. That is, at least one of the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL, the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL, and the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL may be different from the other distances.

[0138] Specifically, the size (planar area) of the first pixel opening POP1 exposing a portion of the pixel electrode PE of the first light-emitting element LED1, the size (planar area) of the second pixel opening POP2 exposing a portion of the pixel electrode PE of the second light-emitting element LED2, and the size (planar area) of the third pixel opening POP3 exposing a portion of the pixel electrode PE of the third light-emitting element LED3 can be considered to determine the horizontal height of each of the pixel electrode PE of the first light-emitting element LED1, the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the third light-emitting element LED3.

[0139] In an embodiment, for example, when the size (planar area) of the third pixel opening POP3 is smaller than each of the size (planar area) of the first pixel opening POP1 and the size (planar area) of the second pixel opening POP2, the horizontal height of the pixel electrode PE at which the third light-emitting element LED3 is set may be different from at least one of the horizontal height of the pixel electrode PE at which the first light-emitting element LED1 is set and the horizontal height of the pixel electrode PE at which the second light-emitting element LED2 is set.

[0140] In other words, the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL may be different from at least one of the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL and the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL.

[0141] In an embodiment, for example, the pixel electrode PE of the third light emitting element LED3 may be located at a level higher than the pixel electrode PE of the first light emitting element LED1 and the pixel electrode PE of the second light emitting element LED2 .

[0142] In other words, the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL can be shorter than the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL and the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL.

[0143] In the first sub-display area SDA1 provided with the light blocking layer LBL, if the pixel electrodes PE of the first light-emitting element LED1, the second light-emitting element LED2, and the third light-emitting element LED3 are all arranged at the same horizontal height, the display device in the private drive mode may be affected by the difference in size (planar area) between the first to third pixel openings POP1, POP2, and POP3. Therefore, in the private drive mode, the brightness deviation of the display device 1 at each azimuth angle may occur, thereby deteriorating the display quality.

[0144] According to the embodiment, in the first sub-display area SDA1, the differences in the sizes (planar areas) of the first to third pixel openings POP1, POP2, and POP3 can be taken into account to achieve differences in the horizontal heights of the corresponding pixel electrodes PE. That is, differences can be achieved between the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL, the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL, and the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL. Accordingly, brightness deviations at each azimuth angle of the display device 1 caused by the differences in the sizes (planar areas) of the first to third pixel openings POP1, POP2, and POP3 can be reduced or prevented. In other words, in the private drive mode, brightness deviations at each azimuth angle of the display device 1 can be reduced or prevented. Accordingly, the display quality of the display device 1 can be improved. Furthermore, in the private drive mode, the viewing angle can be adjusted more easily. Therefore, the viewing angle adjustment effect can be improved.

[0145] Figure 11 According to another embodiment, Figure 7 A cross-sectional view taken along line II'. Figure 12 According to another embodiment, Figure 7 A cross-sectional view taken along line II-II'. Figure 13 According to another embodiment, Figure 7 A cross-sectional view taken along line III-III'.

[0146] In an embodiment, for example, Figure 11 Can be used with Figure 8The cross-sectional view corresponds to Figure 12 Can be used with Figure 9 corresponds to the cross-sectional view of Figure 13 Can be used with Figure 10 corresponds to the cross-sectional view of .

[0147] Referring to FIG. 1 , except that the fourth insulating layer IL4′ is included instead of the fourth insulating layer IL4 and the fifth insulating layer IL5 is further included. Figures 11 to 13 The display device 1 described can be used with reference Figures 8 to 10 The display device 1 described in the foregoing is substantially the same. In addition, the fourth insulating layer IL4' may be the same as that of the reference except that a hole HL is defined instead of a trench TRC. Figures 8 to 10 The fourth insulating layer IL4 is described to be substantially the same, and therefore, redundant descriptions are omitted or simplified.

[0148] See also Figures 11 to 13 In an embodiment, the display device 1 may include a fourth insulating layer IL4 ′ and a fifth insulating layer IL5 .

[0149] The fifth insulating layer IL5 may be disposed between the third insulating layer IL3 and the fourth insulating layer IL4'. That is, the fifth insulating layer IL5 may be disposed on the fourth conductive pattern CP4. In other words, the fifth insulating layer IL5 may cover the fourth conductive pattern CP4. The fifth insulating layer IL5 may include an organic insulating material and / or an inorganic insulating material.

[0150] The fourth insulating layer IL4' may be disposed on the fifth insulating layer IL5. In an embodiment, the fourth insulating layer IL4' may have at least one hole HL located in the first sub-display area SDA1. The hole HL may penetrate the fourth insulating layer IL4'. In other words, the hole HL may expose a portion of the fifth insulating layer IL5. Since the fourth insulating layer IL4' has the hole HL, a step may be formed between the upper surface of the fourth insulating layer IL4' and the upper surface of the fifth insulating layer IL5 in the first sub-display area SDA1.

[0151] The pixel electrode PE may be disposed on the fourth insulating layer IL4 ′ and the fifth insulating layer IL5 , and may contact the fourth conductive pattern CP4 through a contact hole defined in the fourth insulating layer IL4 ′ and / or the fifth insulating layer IL5 .

[0152] like Figure 11 and Figure 12As shown in FIG, in the first sub-display area SDA1, the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 can be disposed within the hole HL of the fourth insulating layer IL4'. In other words, the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 can be disposed directly on the fifth insulating layer IL5. On the other hand, the pixel electrode PE of the third light-emitting element LED3 does not need to be disposed within the hole HL. In other words, the pixel electrode PE of the third light-emitting element LED6 can be disposed directly on the fourth insulating layer IL4'.

[0153] Accordingly, the pixel electrode PE of the third light emitting element LED3 may have a different level from at least one of the pixel electrode PE of the first light emitting element LED1 and the pixel electrode PE of the second light emitting element LED2 .

[0154] In an embodiment, for example, the pixel electrode PE of the third light-emitting element LED3 can be set at a different horizontal height from the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 can be set at the same horizontal height.

[0155] In other words, the upper surface of the pixel electrode PE of the first light-emitting element LED1 may have a first height H1 from the upper surface of the substrate SUB, the upper surface of the pixel electrode PE of the second light-emitting element LED2 may have a second height H2 equal to the first height H1 from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the third light-emitting element LED3 may have a third height H3 different from the first height H1 and the second height H2 from the upper surface of the substrate SUB.

[0156] In an embodiment, for example, in the first sub-display area SDA1, the pixel electrode PE of the third light-emitting element LED3 may be disposed at a higher level than the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2. In other words, the upper surface of the pixel electrode PE of the third light-emitting element LED3 may have a third height H3 from the upper surface of the substrate SUB that is higher than the first height H1 and the second height H2.

[0157] However, the present invention is not necessarily limited to this. In an embodiment, if the pixel electrode PE of the third light-emitting element LED3 is set at a different horizontal height from at least one of the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2, then the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 can be set at different horizontal heights from each other.

[0158] That is, in the embodiment, if the upper surface of the pixel electrode PE of the third light emitting element LED3 has a third height H3 different from the first height H1 and the second height H2 from the upper surface of the substrate SUB, the first height H1 and the second height H2 may be different from each other.

[0159] like Figure 13 As shown in FIG, in the second sub-display area SDA2, the pixel electrode PE of the fifth light-emitting element LED5 may not be disposed in the hole HL. Although not shown, the pixel electrode PE of the fourth light-emitting element LED4 and the pixel electrode PE of the sixth light-emitting element LED6 may also not be disposed in the hole HL. That is, since the hole HL is not defined in the second sub-display area SDA2, the pixel electrode PE may not be disposed in the hole HL in the second sub-display area SDA2.

[0160] Accordingly, the pixel electrode PE of the fifth light-emitting element LED5 may be disposed at the same level as the pixel electrode PE of the third light-emitting element LED3. In other words, the upper surface of the pixel electrode PE of the fifth light-emitting element LED5 may have a fourth height H4 from the upper surface of the substrate SUB that is equal to the third height H3.

[0161] Although not shown, the pixel electrode PE of the fourth light-emitting element LED4 and the pixel electrode PE of the sixth light-emitting element LED6 may also be arranged at the same horizontal height as the pixel electrode PE of the third light-emitting element LED3. That is, the upper surface of the pixel electrode PE of the fourth light-emitting element LED4 may have a fourth height H4 equal to the third height H3 from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the sixth light-emitting element LED6 may have a fourth height H4 equal to the third height H3 from the upper surface of the substrate SUB.

[0162] A portion of the pixel defining layer PDL may be disposed in the hole HL. Figure 11 and Figure 12 As shown in FIG, a portion of the pixel defining layer PDL may cover an edge of the hole HL.

[0163] At least one of the first distance d1 from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL and the second distance d2 from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL may be different from the third distance d3 from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL.

[0164] In an embodiment, for example, Figure 11 and Figure 12As shown in , a first distance d1 from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL may be equal to a second distance d2 from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL. In addition, a third distance d3 from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL may be different from the first distance d1 and the second distance d2.

[0165] In the embodiment, for example, since the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 are disposed in the hole HL of the fourth insulating layer IL4, and the pixel electrode PE of the third light-emitting element LED3 is not disposed in the hole HL, the pixel electrode PE of the third light-emitting element LED3 can be disposed at a higher level than the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2. Accordingly, a third distance d3 from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL can be shorter than a first distance d1 from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL and a second distance d2 from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL.

[0166] However, the present invention is not necessarily limited thereto, and in an embodiment, if the third distance d3 is different from the first distance d1 and the second distance d2, the first distance d1 and the second distance d2 may be different from each other.

[0167] Figure 14 According to yet another embodiment, Figure 7 A cross-sectional view taken along line II'. Figure 15 According to yet another embodiment, Figure 7 A cross-sectional view taken along line II-II'. Figure 16 According to yet another embodiment, Figure 7 A cross-sectional view taken along line III-III'.

[0168] In an embodiment, for example, Figure 14 Can be used with Figure 8 The cross-sectional view corresponds to Figure 15 Can be used with Figure 9 corresponds to the cross-sectional view of Figure 16 Can be used with Figure 10 corresponds to the cross-sectional view of .

[0169] Except for including the fourth insulating layer IL4 ″ instead of the fourth insulating layer IL4, Figures 14 to 16 The display device 1 described can be used with reference Figures 8 to 10The display device 1 described is substantially the same as that of FIG. 1 . In addition, the fourth insulating layer IL4 ″ may be the same as that of FIG. 1 , except that the first trench TRC1 and the second trench TRC2 are defined instead of the trench TRC. Figures 8 to 10 The fourth insulating layer IL4 is described to be substantially the same, and therefore, redundant descriptions are omitted or simplified.

[0170] refer to Figure 14 In an embodiment, the display device 1 may include a fourth insulating layer IL4'.

[0171] The fourth insulating layer IL4" may define a first groove TRC1 and a second groove TRC2 located in the first sub-display area SDA1. The first groove TRC1 and the second groove TRC2 may be defined as a portion in which the fourth insulating layer IL4" is recessed to a specific point. That is, the first groove TRC1 and the second groove TRC2 may not expose a component under the fourth insulating layer IL4". In an embodiment, for example, after applying a preliminary insulating layer on the third insulating layer IL3 and the fourth conductive pattern CP4, the preliminary insulating layer may be patterned using a half-tone mask, etc. to form a fourth insulating layer IL4" defining the first groove TRC1 and the second groove TRC2.

[0172] The depth to which the fourth insulating layer IL4” is recessed by the first groove TRC1 may be different from the depth to which the fourth insulating layer IL4” is recessed by the second groove TRC2. In an embodiment, for example, the depth to which the fourth insulating layer IL4” is recessed by the first groove TRC1 may be smaller than the depth to which the fourth insulating layer IL4” is recessed by the second groove TRC2. Since the fourth insulating layer IL4” defines the first groove TRC1 and the second groove TRC2, the upper surface of the fourth insulating layer IL4” may have steps in the first sub-display area SDA1. That is, due to the first groove TRC1 and the second groove TRC2, the fourth insulating layer IL4” may include first to third portions having different thicknesses.

[0173] like Figure 14 and Figure 15 As shown in the figure, in the first sub-display area SDA1, the pixel electrode PE of the first light-emitting element LED1 may be arranged in the first groove TRC1 of the fourth insulating layer IL4", and the pixel electrode PE of the second light-emitting element LED2 may be arranged in the second groove TRC2 of the fourth insulating layer IL4". On the other hand, the pixel electrode PE of the third light-emitting element LED3 may not be arranged in the first groove TRC1 and the second groove TRC2.

[0174] Accordingly, the pixel electrode PE of the first light emitting element LED1 , the pixel electrode PE of the second light emitting element LED2 , and the pixel electrode PE of the third light emitting element LED3 are disposed at different levels from each other.

[0175] In other words, the upper surface of the pixel electrode PE of the first light-emitting element LED1 may have a first height H1' from the upper surface of the substrate SUB, the upper surface of the pixel electrode PE of the second light-emitting element LED2 may have a second height H2' different from the first height H1' from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the third light-emitting element LED3 may have a third height H3' different from the first height H1' and the second height H2' from the upper surface of the substrate SUB.

[0176] In an embodiment, for example, in the first sub-display area SDA1, the pixel electrode PE of the third light-emitting element LED3 may be disposed at a higher level than the levels at which the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2 are disposed. Furthermore, the pixel electrode PE of the first light-emitting element LED1 may be disposed at a higher level than the level at which the pixel electrode PE of the second light-emitting element LED2 is disposed.

[0177] In other words, the upper surface of the pixel electrode PE of the third light-emitting element LED3 may have a third height H3' higher than the first height H1' and the second height H2' from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the first light-emitting element LED1 may have a first height H1' higher than the second height H2' from the upper surface of the substrate SUB.

[0178] like Figure 16 As shown in the figure, in the second sub-display area SDA2, the pixel electrode PE of the fifth light-emitting element LED5 may not be disposed in the first groove TRC1 and the second groove TRC2. Although not shown, the pixel electrode PE of the fourth light-emitting element LED4 and the pixel electrode PE of the sixth light-emitting element LED6 may also not be disposed in the first groove TRC1 and the second groove TRC2. That is, since the first groove TRC1 and the second groove TRC2 are not defined in the second sub-display area SDA2, the pixel electrode PE may not be disposed in the first groove TRC1 and the second groove TRC2 in the second sub-display area SDA2.

[0179] Accordingly, the pixel electrode PE of the fifth light-emitting element LED5 may be disposed at the same level as the pixel electrode PE of the third light-emitting element LED3. In other words, the upper surface of the pixel electrode PE of the fifth light-emitting element LED5 may have a fourth height H4' equal to the third height H3' from the upper surface of the substrate SUB.

[0180] Although not shown, the pixel electrode PE of the fourth light-emitting element LED4 and the pixel electrode PE of the sixth light-emitting element LED6 may also be arranged at the same horizontal height as the pixel electrode PE of the third light-emitting element LED3. That is, the upper surface of the pixel electrode PE of the fourth light-emitting element LED4 may have a fourth height H4' equal to the third height H3' from the upper surface of the substrate SUB, and the upper surface of the pixel electrode PE of the sixth light-emitting element LED6 may have a fourth height H4' equal to the third height H3' from the upper surface of the substrate SUB.

[0181] A portion of the pixel defining layer PDL may be disposed in the first trench TRC1 and the second trench TRC2. Figure 14 and Figure 15 As shown in , a portion of the pixel defining layer PDL may cover an edge of each of the first trench TRC1 and the second trench TRC2 .

[0182] A first distance d1′ from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL, a second distance d2′ from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL, and a third distance d3′ from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL may be different from each other.

[0183] In an embodiment, for example, since the pixel electrode PE of the first light-emitting element LED1 is set in the first groove TRC1, the pixel electrode PE of the second light-emitting element LED2 is set in the second groove TRC2, and the pixel electrode PE of the third light-emitting element LED3 is not set in the first groove TRC1 and the second groove TRC2, the pixel electrode PE of the third light-emitting element LED3 can be set at a horizontal height higher than the horizontal heights of the pixel electrode PE of the first light-emitting element LED1 and the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the first light-emitting element LED1 can be set at a horizontal height higher than the horizontal height of the pixel electrode PE of the second light-emitting element LED2.

[0184] Accordingly, a third distance d3′ from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL may be shorter than the first distance d1′ from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL and the second distance d2′ from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL, and the first distance d1′ from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL may be shorter than the second distance d2′ from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL. Each of the first to third distances d1 to d3 and each of the first to third distances d1′ to d3′ and each of the first to fourth heights H1 to H4 and each of the first to fourth heights H1′ to H4′ are measured in the third direction DR3 (e.g., the thickness direction of the substrate SUB).

[0185] According to an embodiment, in the first sub-display area SDA1 provided with the light blocking layer LBL, the pixel electrode PE of the first light-emitting element LED1, the pixel electrode PE of the second light-emitting element LED2, and the pixel electrode PE of the third light-emitting element LED3 may be provided at different levels. Accordingly, the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light blocking layer LBL, the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light blocking layer LBL, and the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light blocking layer LBL may be different from each other.

[0186] In an embodiment, for example, when the size (planar area) of the third pixel opening POP3 is smaller than each of the size (planar area) of the first pixel opening POP1 and the size (planar area) of the second pixel opening POP2, and the size (planar area) of the first pixel opening POP1 is smaller than the size (planar area) of the second pixel opening POP2, the horizontal height of the pixel electrode PE of the third light-emitting element LED3 can be higher than the horizontal height of the pixel electrode PE of the first light-emitting element LED1 and the horizontal height of the pixel electrode PE of the second light-emitting element LED2.

[0187] In other words, the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL can be shorter than the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL and the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL, and the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL can be shorter than the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL.

[0188] That is, in the first sub-display area SDA1, taking into account the differences in size (planar area) between the first to third pixel openings POP1, POP2, and POP3, it is possible to achieve differences in the horizontal heights of the corresponding pixel electrodes PE. Specifically, differences can be achieved between the distance from the upper surface of the pixel electrode PE of the first light-emitting element LED1 to the lower surface of the light-blocking layer LBL, the distance from the upper surface of the pixel electrode PE of the second light-emitting element LED2 to the lower surface of the light-blocking layer LBL, and the distance from the upper surface of the pixel electrode PE of the third light-emitting element LED3 to the lower surface of the light-blocking layer LBL. Accordingly, brightness deviations at each azimuth angle of the display device 1 caused by the differences in size (planar area) between the first to third pixel openings POP1, POP2, and POP3 can be reduced or prevented. In other words, in the private drive mode, brightness deviations at each azimuth angle of the display device 1 can be reduced or prevented. Accordingly, the display quality of the display device 1 can be improved. Furthermore, in the private drive mode, the viewing angle can be adjusted more easily. Therefore, the viewing angle adjustment effect can be improved.

[0189] Industrial Applicability

[0190] The present invention can be applied to various display devices and electronic devices including display devices. For example, the present invention can be applied to high-resolution smart phones, mobile phones, smart boards, smart watches, tablet PCs, car navigation systems, televisions, computer monitors, or laptop computers, etc.

[0191] While the present invention has been described above with reference to exemplary embodiments thereof, those skilled in the art will recognize that various changes in form and details may be made therein without departing from the spirit or scope of the invention as defined by the following claims.

[0192] <Description of Reference Signs>

[0193] 1: Display device EA: Emission area

[0194] NEA: non-emission area SDA1: first sub-display area

[0195] SDA2: Second sub-display area SUB: Substrate

[0196] LED1, LED2, LED3, LED4, LED5, LED6: first to sixth light-emitting elements

[0197] PDL: Pixel Definition Layer ENC: Encapsulation Layer

[0198] LBL: Light Blocking Layer LOP: Emission Opening

[0199] PE: pixel electrode d1, d1': first distance

[0200] d2, d2': second distance d3, d3': third distance

[0201] H1, H1': first height H2, H2': second height

[0202] H3, H3': third height

Claims

1. A display device comprising: A substrate including a first region including an emissive region and a non-emissive region; first to third light-emitting elements disposed in the first region on the substrate and configured to provide light of different colors to the emission regions of the first region; a pixel defining layer, disposed in the non-emitting region and on the substrate; an encapsulation layer, disposed on the first to third light-emitting elements; as well as a light blocking layer disposed in the first region and on the encapsulation layer and defining emission openings corresponding to the first to third light emitting elements; wherein at least one of a first distance from the upper surface of the pixel electrode of the first light-emitting element to the lower surface of the light-blocking layer and a second distance from the upper surface of the pixel electrode of the second light-emitting element to the lower surface of the light-blocking layer is different from a third distance from the upper surface of the pixel electrode of the third light-emitting element to the lower surface of the light-blocking layer.

2. The display device according to claim 1, wherein The third distance is shorter than each of the first distance and the second distance.

3. The display device according to claim 1, wherein The upper surface of the pixel electrode of the first light emitting element has a first height from the upper surface of the substrate, The upper surface of the pixel electrode of the second light emitting element has a second height from the upper surface of the substrate, The upper surface of the pixel electrode of the third light emitting element has a third height from the upper surface of the substrate, and At least one of the first height and the second height is different from the third height.

4. The display device according to claim 3, wherein The third height is greater than each of the first height and the second height.

5. The display device according to claim 3, further comprising: The second region of the substrate includes an emission region and a non-emission region; and fourth to sixth light-emitting elements disposed in the second region, on the substrate, and configured to provide light of different colors to the emission region of the second region, and Wherein, the light blocking layer is not provided in the second region. The display device according to claim 5 , wherein: Each of the upper surfaces of the pixel electrodes of the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element has a fourth height from the upper surface of the substrate that is equal to the third height.

7. The display device according to claim 1, wherein The pixel defining layer defines a first pixel opening exposing a portion of the pixel electrode of the first light emitting element, a second pixel opening exposing a portion of the pixel electrode of the second light emitting element, and a third pixel opening exposing a portion of the pixel electrode of the third light emitting element, and A planar area of ​​the third pixel opening is smaller than each of a planar area of ​​the first pixel opening and a planar area of ​​the second pixel opening.

8. The display device according to claim 1, wherein The first light emitting element is configured to provide red light, The second light emitting element is configured to provide blue light, and The third light emitting element is configured to provide green light.

9. The display device according to claim 1, further comprising: a conductive pattern disposed below the first to third light-emitting elements and in contact with the first to third light-emitting elements; as well as an insulating layer covering the conductive pattern and defining at least one trench in the first region, The pixel electrode of the first light-emitting element and the pixel electrode of the second light-emitting element are arranged in the groove.

10. The display device according to claim 9, wherein A portion of the pixel defining layer is disposed in the groove.

11. The display device according to claim 1 , further comprising: a conductive pattern disposed below the first to third light-emitting elements and in contact with the first to third light-emitting elements; a first insulating layer, covering the conductive pattern; as well as a second insulating layer disposed on the first insulating layer and defining at least one hole exposing a portion of the first insulating layer in the first region, The pixel electrode of the first light-emitting element and the pixel electrode of the second light-emitting element are disposed in the hole.

12. The display device according to claim 11, wherein A portion of the pixel defining layer is disposed in the hole.

13. A display device comprising: A substrate including a first region including an emissive region and a non-emissive region; first to third light-emitting elements disposed in the first region on the substrate and configured to provide light of different colors to the emission regions of the first region; a pixel defining layer, disposed in the non-emitting region and on the substrate; an encapsulation layer, disposed on the first to third light-emitting elements; as well as a light blocking layer disposed in the first region and on the encapsulation layer and defining emission openings corresponding to the first to third light emitting elements; wherein a first distance from the upper surface of the pixel electrode of the first light-emitting element to the lower surface of the light-blocking layer, a second distance from the upper surface of the pixel electrode of the second light-emitting element to the lower surface of the light-blocking layer, and a third distance from the upper surface of the pixel electrode of the third light-emitting element to the lower surface of the light-blocking layer are different from each other.

14. The display device according to claim 13, wherein: The third distance is shorter than each of the first distance and the second distance, and The first distance is shorter than the second distance.

15. The display device according to claim 13, wherein The upper surface of the pixel electrode of the first light emitting element has a first height from the upper surface of the substrate, The upper surface of the pixel electrode of the second light emitting element has a second height from the upper surface of the substrate, The upper surface of the pixel electrode of the third light emitting element has a third height from the upper surface of the substrate, and The first height, the second height, and the third height are different from each other.

16. The display device according to claim 15, wherein The third height is greater than each of the first height and the second height, and The second height is greater than the first height.

17. The display device according to claim 13, wherein: The pixel defining layer defines a first pixel opening exposing a portion of the pixel electrode of the first light emitting element, a second pixel opening exposing a portion of the pixel electrode of the second light emitting element, and a third pixel opening exposing a portion of the pixel electrode of the third light emitting element, and A planar area of ​​the first pixel opening, a planar area of ​​the second pixel opening, and a planar area of ​​the third pixel opening are different from each other.

18. The display device according to claim 13, wherein The first light emitting element is configured to provide red light, The second light emitting element is configured to provide blue light, and The third light emitting element is configured to provide green light.

19. The display device according to claim 13, further comprising: The second region of the substrate includes an emission region and a non-emission region; and fourth to sixth light-emitting elements disposed in the second region, on the substrate, and configured to provide light of different colors to the emission region of the second region, and Wherein, the light blocking layer is not provided in the second region.

20. The display device according to claim 13, further comprising: a conductive pattern disposed below the first to third light-emitting elements and in contact with the first to third light-emitting elements; as well as an insulating layer covering the conductive pattern and defining at least one trench in the first region, Wherein, two of the pixel electrode of the first light-emitting element, the pixel electrode of the second light-emitting element, and the pixel electrode of the third light-emitting element are disposed in the groove.

21. The display device according to claim 20, wherein A portion of the pixel defining layer is disposed in the groove.

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