Display device

Abstract

An embodiment discloses a display device including: a substrate; a plurality of sub-pixels disposed on the substrate in a first direction and a second direction intersecting each other; and a first trench and a second trench disposed between the plurality of sub-pixels and extending in a second direction, a first interval region in which the first trench and the second trench are spaced apart from each other by a first interval and a second interval region in which the first trench and the second trench are spaced apart from each other by a second interval larger than the first interval are provided, and the plurality of sub-pixels are respectively provided in the second regions.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2023 - 0196668, filed on December 29, 2023, the entire disclosure of which is incorporated herein by reference. Technical field

[0003] Embodiments relate to a display device. Background art

[0004] Various types of personal immersive devices, such as head - mounted displays (HMDs), face - mounted displays (FMDs), eyeglass - type displays (EGDs), etc., are being developed. Personal immersive devices are classified as virtual reality (VR) devices or augmented reality (AR) devices.

[0005] In personal immersive devices, for high resolution, sub - pixels should be formed at dense intervals. In this case, there is a problem of leakage current generated in the boundary region between adjacent sub - pixels. Summary of the invention

[0006] One embodiment aims to provide a display device capable of blocking leakage current generated between sub - pixels.

[0007] The technical problems to be solved by the embodiments are not limited to the above - mentioned technical problems, and those of ordinary skill in the art can clearly understand other technical problems not mentioned herein from the following description.

[0008] A display device according to an aspect of the present disclosure includes: a substrate; a plurality of sub - pixels disposed on the substrate along first and second intersecting directions; and first and second trenches disposed between the plurality of sub - pixels and extending in the second direction, wherein a first interval region in which the first trench and the second trench are spaced apart from each other by a first interval and a second interval region in which the first trench and the second trench are spaced apart from each other by a second interval larger than the first interval are provided, and the plurality of sub - pixels are respectively disposed in the second region.

[0009] The plurality of sub - pixels may have sub - pixels of different colors disposed in the first direction and a diagonal direction intersecting the first and second directions.

[0010] The plurality of sub - pixels may be disposed in a zigzag shape in the second direction.

[0011] The plurality of sub - pixels may include a first sub - pixel, a second sub - pixel, and a third sub - pixel having different colors, and the first sub - pixel is surrounded by the second sub - pixel and the third sub - pixel, and the centers of the first sub - pixel, the second sub - pixel, and the third sub - pixel are disposed in a triangular shape.

[0012] Each of the plurality of sub-pixels may have a polygonal shape, an elliptical shape, or a circular shape on a plane.

[0013] The plurality of sub-pixels may include a plurality of sub-pixels provided in a first pixel line and a plurality of sub-pixels provided in a second pixel line spaced apart from the first pixel line, and the plurality of sub-pixels provided in the first pixel line may be arranged not to be aligned with the plurality of sub-pixels provided in the second pixel line in a second direction.

[0014] The first trench and the second trench may be arranged to be spaced apart from each other by a first interval between the plurality of sub-pixels provided in the first pixel line, and may be bent in a direction away from each other and arranged to be spaced apart from each other by a second interval between the plurality of sub-pixels provided in the second pixel line.

[0015] The plurality of sub-pixels may include a plurality of first electrodes provided on a substrate among the plurality of sub-pixels, a light-emitting layer provided on the plurality of first electrodes, and a second electrode provided on the light-emitting layer. The plurality of sub-pixels may be separated by the first trench and the second trench, and a part of the light-emitting layer may be disconnected by the first trench and the second trench.

[0016] The light-emitting layer may include a first stack, a charge generation layer provided on the first stack, and a second stack provided on the charge generation layer. The first stack and the charge generation layer may be disconnected by the first trench and the second trench, and at least a part of the second stack is continuously connected.

[0017] The first trench and the second trench may include a first part extending in a direction parallel to the second direction, a second part extending in a direction intersecting the second direction, and a bent region where the first part and the second part are connected, and a curvature may be formed in each bent region.

[0018] The second direction may be perpendicular to the first direction.

[0019] The display device may include a first pixel group provided in a first display area and a second pixel group provided in a second display area surrounding the first display area. The size of the plurality of sub-pixels provided in the second pixel group is larger than the size of the plurality of sub-pixels provided in the first pixel group. Among them, a plurality of third trenches extending in the second direction are provided between the plurality of sub-pixels in the first pixel group, and the first trench and the second trench are provided between the plurality of sub-pixels in the second pixel group. And the display device may further include a third interval region in which the plurality of third trenches are spaced apart from each other by a third interval. The third interval region is wider than the first interval region and narrower than the second interval region.

[0020] At the boundary between the first display region and the second display region, a plurality of sub-pixels in the first display region and a plurality of sub-pixels in the second display region may be set to face each other in the same color.

[0021] The third trench may be connected to the first trench and the second trench.

[0022] The third trench may not be connected to the first trench and the second trench.

[0023] A display device according to another aspect of the present disclosure includes: a substrate; a plurality of sub-pixels disposed on the substrate along a first direction and a second direction perpendicular to the first direction; and trenches disposed between the plurality of sub-pixels, wherein the number of trenches disposed between sub-pixels disposed along the first direction is greater than or equal to the number of trenches disposed between sub-pixels disposed along a diagonal direction.

[0024] The plurality of sub-pixels may have sub-pixels of different colors disposed in the first direction and the diagonal direction, and the diagonal direction may be a direction intersecting the first direction and the second direction.

[0025] The trenches disposed between sub-pixels disposed along the first direction may be connected to the trenches disposed between sub-pixels disposed along the diagonal direction.

[0026] Two grooves may be provided between a plurality of sub-pixels disposed in the first direction, and one groove may be provided between a plurality of sub-pixels disposed in the diagonal direction.

[0027] Two grooves may be provided between a plurality of sub-pixels disposed in the first direction, and two grooves may be provided between a plurality of sub-pixels disposed in the diagonal direction.

[0028] One groove may be provided between a plurality of sub-pixels disposed in the first direction, and one groove may be provided between a plurality of sub-pixels disposed in the diagonal direction. Description of the Drawings

[0029] The above and other objects, features, and advantages of the present invention will become more apparent to those of ordinary skill in the art by referring to the accompanying drawings in which:

[0030] Figure 1 is a view showing sub-pixels of a display device according to an embodiment of the present disclosure;

[0031] Figure 2 is a cross-sectional view taken along line I-I' in Figure 1 ;

[0032] Figure 3 is a cross-sectional view taken along Figure 1A cross-sectional view taken along line II-II' in;

[0033] Figure 4 is a cross-sectional view of the light-emitting layer;

[0034] Figure 5 is Figure 2 an enlarged view of part A in;

[0035] Figure 6 is a view showing a state in which grooves provided between sub-pixels are connected to each other;

[0036] Figure 7 is a view showing Figure 6 a point where the grooves in are connected to each other;

[0037] Figure 8 is taken along Figure 7 a cross-sectional view taken along line III-III' in;

[0038] Figure 9 is a view showing a first modification example of a groove according to an embodiment of the present disclosure;

[0039] Figure 10 is a view showing a second modification example of a groove according to an embodiment of the present disclosure;

[0040] Figure 11 is a view showing a third modification example of a groove according to an embodiment of the present disclosure;

[0041] Figure 12 is a view showing sub-pixels of a display device according to another embodiment of the present disclosure;

[0042] Figure 13 is a view showing sub-pixels of a display device according to still another embodiment of the present disclosure;

[0043] Figure 14 is Figure 13 an enlarged view of part B in;

[0044] Figure 15 is Figure 14 a modification example of;

[0045] Figure 16 is a view showing an example of a personal immersive device of a head-mounted display (HMD) type; and

[0046] Figure 17 is a block diagram showing an example of a display device applicable to a personal immersive device. Detailed Description

[0047] Advantages and features of the present disclosure, and methods for achieving these advantages and features, will become apparent with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments to be described below and may be implemented in various different forms. The embodiments are provided only to fully disclose the present specification and to fully convey the scope of the present disclosure to those of ordinary skill in the art, and the present disclosure is defined only by the scope of the claims.

[0048] Since the shapes, sizes, ratios, angles, quantities, etc. disclosed in the drawings for describing the embodiments of the present disclosure are only exemplary, the present disclosure is not limited to the items shown in the drawings. The same reference numerals refer to the same components throughout the specification. Additionally, when determining that a detailed description of related known technologies may unnecessarily obscure the gist of the present disclosure, its detailed description will be omitted.

[0049] When using terms such as "provide", "include", "have", "consist of", etc. mentioned in this specification, unless "only" is used, other parts may be added. The case where a component is expressed in the singular form includes the plural form, unless otherwise clearly stated.

[0050] When interpreting a component, it should be understood that even without a separate explicit description, the error range is included.

[0051] When describing the positional relationship and interconnection relationship between two components such as "on", "above", "below", "beside", "connected or joined", "crossed or intersected", etc., unless "immediately" or "directly" is mentioned, one or more other components may be interposed between the two components.

[0052] In the case where the temporal relationship is described as "after", "then", "next", "before", etc., it may not be continuous on the time axis, unless "immediately" or "directly" is used.

[0053] In the description of the embodiments, although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first component to be mentioned below may also be the second component within the technical concept of this specification.

[0054] The same reference numerals refer to the same components throughout the specification.

[0055] The features of the respective embodiments may be partially or wholly combined or combined with each other, and technically, various types of interconnections and drives are possible, and the embodiments may be implemented independently of each other or may be implemented together in a mutually dependent relationship.

[0056] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0057] Figure 1 is a view showing sub-pixels of a display device according to an embodiment of the present disclosure.

[0058] Referring to Figure 1 , a display device according to an embodiment includes a plurality of sub-pixels SP1, SP2, and SP3 disposed on a substrate 110 along a first direction (X-axis direction) and a second direction (Y-axis direction) intersecting the first direction, and first trenches 191 and second trenches 192 disposed between the plurality of sub-pixels SP1, SP2, and SP3 and extending along the second direction (Y-axis direction). In the embodiment, an example in which the number of trenches is two is described, but the number of trenches is not limited thereto. Herein, the second direction may be perpendicular to the first direction, but is not limited thereto.

[0059] The plurality of sub-pixels SP1, SP2, and SP3 may be disposed in a plurality of pixel rows PL1, PL2, and PL3 disposed along the first direction (X-axis direction). The plurality of pixel rows may be disposed to be spaced apart from each other in the second direction (Y-axis direction).

[0060] For example, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be sequentially disposed in the first pixel row PL1 in the first direction (X-axis direction). Additionally, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be sequentially disposed in the second pixel row PL2 in the first direction (X-axis direction).

[0061] The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be sub-pixels having different colors. For example, the first sub-pixel SP1 may be a red sub-pixel, the second sub-pixel SP2 may be a green sub-pixel, and the third sub-pixel SP3 may be a blue sub-pixel. However, the present disclosure is not necessarily limited thereto, and the colors of the respective sub-pixels may be changed in various ways.

[0062] The plurality of sub-pixels SP1, SP2, and SP3 disposed in the first pixel row PL1 and the plurality of sub-pixels SP1, SP2, and SP3 disposed in the second pixel row PL2 may be disposed so as not to be aligned with each other. Accordingly, the plurality of sub-pixels SP1, SP2, and SP3 may be disposed in a zigzag shape in the second direction (Y-axis direction). The zigzag shape ZP1 may be defined as a shape in which a virtual line connecting the centers of the sub-pixels disposed in the second direction (Y-axis direction) is not parallel to the second direction (Y-axis direction) and repeatedly approaches and moves away from a vertical line parallel to the second direction (Y-axis direction). Herein, the second direction (Y-axis direction) may be defined as a concept including a 2-1 direction (Y1-axis direction) and a 2-2 direction (Y2-axis direction).

[0063] Multiple sub-pixels SP1, SP2, and SP3 may have sub-pixels of different colors arranged in the first direction (X-axis direction) and diagonal directions (E1 direction and E2 direction). The diagonal directions (E1 direction and E2 direction) may be directions that intersect the first direction (X-axis direction) and the second direction (Y-axis direction), and in the diagonal directions, the multiple sub-pixels SP1, SP2, and SP3 are arranged in sequence. The multiple sub-pixels SP1, SP2, and SP3 may have sub-pixels of different colors arranged in sequence in the first direction (X-axis direction), and sub-pixels of different colors arranged in sequence in the diagonal directions (E1 direction and E2 direction).

[0064] For example, the second sub-pixel SP2 and the third sub-pixel SP3 may be arranged on both sides in the first direction (X-axis direction), and the second sub-pixel SP2 and the third sub-pixel SP3 may also be arranged along the diagonal directions (E1 direction and E2 direction) based on the first sub-pixel SP1 set at the center C1. That is to say, the first sub-pixel SP1 may be surrounded by the second sub-pixel SP2 and the third sub-pixel SP3. This structure may be defined as a delta pixel structure. Alternatively, a structure in which the sub-pixels SP1, SP2, and SP3 constituting a pixel are arranged in a triangular shape TP1 may be defined as a delta pixel structure. However, the present disclosure is not necessarily limited thereto, and the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 arranged in the first direction (X-axis direction) may constitute a pixel.

[0065] A personal immersive device may use a delta pixel structure to reduce the fatigue of the user's eyes. Since sub-pixels of different colors are arranged in the up, down, left, and right directions and diagonal directions, the delta pixel structure can reduce eye fatigue by increasing chromatic dispersion.

[0066] Although an example in which each of the multiple sub-pixels SP1, SP2, and SP3 has a hexagonal shape is described, the shape of the sub-pixels is not necessarily limited thereto, and the sub-pixels may be composed of various polygonal shapes such as triangles, quadrilaterals, octagons, etc. Additionally, the multiple sub-pixels SP1, SP2, and SP3 may have a circular shape or an elliptical shape.

[0067] Although an example in which the sizes and shapes of the multiple sub-pixels SP1, SP2, and SP3 are all the same is described, the shapes and sizes of the multiple sub-pixels SP1, SP2, and SP3 may be different from each other. For example, at least one of the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be manufactured in a different size. At least one of the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be manufactured in a different shape.

[0068] The first trench 191 and the second trench 192 may be disposed between the plurality of sub-pixels SP1, SP2, and SP3. The first trench 191 and the second trench 192 may extend in the second direction (Y-axis direction) while being spaced apart from each other. In this case, the first trench 191 and the second trench 192 may be spaced apart from each other at a predetermined interval while extending in the second direction (Y-axis direction), and thus may not intersect each other.

[0069] The first trench 191 and the second trench 192 may be used to repeatedly form a first interval region SA1 having a first interval and a second interval region SA2 having a second interval larger than the first interval on the substrate 110. The plurality of first interval regions SA1 and the plurality of second interval regions SA2 may be alternately disposed in the second direction (Y-axis direction). The plurality of sub-pixels SP1, SP2, and SP3 may be respectively disposed in the plurality of second interval regions SA2. Therefore, since the light-emitting layer 140 of each sub-pixel is separated from the light-emitting layer 140 of an adjacent sub-pixel, leakage current can be blocked.

[0070] The first trench 191 and the second trench 192 may form a first interval region SA1 having a first interval in the first pixel row PL1, and may be bent in a direction away from each other along the side surface of the sub-pixel to form a second interval region SA2 while extending to the second pixel row PL2. Thereafter, the first trench 191 and the second trench 192 may be bent in a direction approaching each other, and may be disposed between adjacent sub-pixels while extending to the third pixel row PL3 as the next row.

[0071] Alternatively, on the other hand, the first trench 191 and the second trench 192 may be bent in a direction approaching each other along the side surface of the sub-pixel while extending from the first pixel row PL1 to the second pixel row PL2. Thereafter, the first trench 191 and the second trench 192 may be bent in a direction away from each other along the side surface of the sub-pixel when extending to the third pixel row PL3 as the next row.

[0072] Both the first trench 191 and the second trench 192 are disposed in the rows of the plurality of sub-pixels SP1, SP2, and SP3 disposed in the first direction (X-axis direction), but only one of the first trench 191 and the second trench 192 may be disposed in the rows of the plurality of sub-pixels SP1, SP2, and SP3 disposed in the diagonal directions (E1 direction and E2 direction).

[0073] That is, the number of grooves provided between the plurality of sub-pixels SP1, SP2, and SP3 arranged in the first direction (X-axis direction) can be greater than the number of grooves provided between the plurality of sub-pixels SP1, SP2, and SP3 arranged in the diagonal directions (E1 direction and E2 direction). In this case, the grooves provided in the first direction can be connected to the grooves provided in the diagonal directions.

[0074] According to an embodiment, the plurality of first grooves 191 and the plurality of second grooves 192 can extend in the second direction (Y-axis direction), and alternately form a plurality of first interval regions SA1 and a plurality of second interval regions SA2, and the plurality of sub-pixels SP1, SP2, and SP3 can be provided in each second interval region SA2. Therefore, the plurality of sub-pixels SP1, SP2, and SP3 can be separated from the light-emitting layers of adjacent sub-pixels in the first direction (X-axis direction) and the diagonal directions (E1 direction and E2 direction) to prevent leakage current.

[0075] Figure 2 is a cross-sectional view taken along Figure 1 line I-I' in Figure 3 is a cross-sectional view taken along Figure 1 line II-II' in

[0076] Referring to Figure 2 and Figure 3 , the display device can include a plurality of first electrodes 130 respectively provided in the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3, a light-emitting layer 140 provided on the plurality of first electrodes 130, and a second electrode 150 provided on the light-emitting layer 140.

[0077] The substrate 110 can be made of glass or plastic. However, the substrate 110 is not necessarily limited thereto, and can be made of a semiconductor material such as a silicon wafer.

[0078] The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 can be provided on the substrate 110. The first sub-pixel SP1 can emit red light, the second sub-pixel SP2 can emit green light, and the third sub-pixel SP3 can emit blue light. However, the light emitted by each sub-pixel can be changed in various ways.

[0079] The display device according to an embodiment can have a top-emitting structure in which light is emitted upward. Therefore, an opaque material as well as a transparent material can be used as the material of the substrate 110.

[0080] For each of a plurality of sub-pixels SP1, SP2, and SP3, circuit elements including various signal lines, thin film transistors, capacitors, etc. can be disposed on a circuit element layer 111. The signal lines can include gate lines, data lines, power lines, and reference lines, and the thin film transistors can include switching thin film transistors, driving thin film transistors, and sensing thin film transistors.

[0081] On the circuit element layer 111, reflection electrodes RP1, RP2, and RP3 can be patterned respectively for the plurality of sub-pixels SP1, SP2, and SP3. Specifically, a first reflection electrode RP1 can be patterned for a first sub-pixel SP1, a second reflection electrode RP2 can be patterned for a second sub-pixel SP2, and a third reflection electrode RP3 can be patterned for a third sub-pixel SP3.

[0082] The reflection electrodes RP1, RP2, and RP3 can be respectively used to implement microcavity properties in the plurality of sub-pixels SP1, SP2, and SP3. Accordingly, the distance from the first reflection electrode RP1 to a second electrode 150 can be longer than the distance from the second reflection electrode RP2 to the second electrode 150, and the distance from the first reflection electrode RP1 to the second electrode 150 can be longer than the distance from the third reflection electrode RP3 to the second electrode 150. The first reflection electrode RP1 can be formed on an upper surface of the circuit element layer 111, the second reflection electrode RP2 can be formed on an upper surface of a first insulating layer 121, and the third reflection electrode RP3 can be formed on an upper surface of a second insulating layer 122.

[0083] A first electrode 130 can include a first electrode 131 disposed in the first sub-pixel SP1, a first electrode 132 disposed in the second sub-pixel SP2, and a first electrode 133 disposed in the third sub-pixel SP3.

[0084] The first reflection electrode RP1 can be electrically insulated from the first electrode 131 of the first sub-pixel SP1, but can be electrically connected to the first electrode 131 of the first sub-pixel SP1 through a contact hole (not shown) disposed in an insulating layer 120.

[0085] The second reflection electrode RP2 can be electrically insulated from the first electrode 132 of the second sub-pixel SP2, but can be electrically connected to the first electrode 132 of the second sub-pixel SP2 through a contact hole (not shown) disposed in the second insulating layer 122.

[0086] The third reflection electrode RP3 can be disposed to contact a lower surface of the first electrode 133 of the third sub-pixel SP3, but in some cases, an insulating layer can be disposed between the third reflection electrode RP3 and the first electrode 133 of the third sub-pixel SP3.

[0087] The first insulating layer 120 may include a first insulating layer 121 disposed on the circuit element layer 111 and a second insulating layer 122 disposed on the first insulating layer 121, but the number of insulating layers 120 is not necessarily limited thereto.

[0088] The trenches 191 and 192 may be formed in the boundary region EG between the plurality of sub-pixels SP1, SP2, and SP3. The trenches 191 and 192 may be formed on the second insulating layer 122, but are not necessarily limited thereto, and may be formed on the first insulating layer 121.

[0089] The first trench 191 and the second trench 192 may be formed in each of the boundary regions EG of the sub-pixels. The depths and widths of the first trench 191 and the second trench 192 may be the same. However, the present disclosure is not necessarily limited thereto, and the depths and / or widths of the first trench 191 and the second trench 192 may be different.

[0090] Referring Figure 3 , the first trench 191 or the second trench 192 may be formed between sub-pixels disposed in the diagonal directions (E1 direction and E2 direction). According to an embodiment, two trenches may be provided between sub-pixels disposed in the first direction (X-axis direction), but one trench may be provided between sub-pixels disposed in the diagonal directions (E1 direction and E2 direction).

[0091] The light-emitting layer 140 may be formed on the plurality of sub-pixels SP1, SP2, and SP3 and the boundary region EG. The light-emitting layer 140 may be formed on the first electrode 130 and the fence 180.

[0092] The light-emitting layer 140 may be configured to emit white (W) light. To this end, the light-emitting layer 140 may include a plurality of stacked layers that emit light of different colors.

[0093] The second electrode 150 may be formed on the light-emitting layer 140. The second electrode 150 may serve as the cathode of the display device. The second electrode 150 may include a transparent conductive material to transmit upward the light emitted from the light-emitting layer 140. The second electrode 150 may be formed of a semi-transparent electrode, and accordingly, a microcavity effect may be obtained for each of the plurality of sub-pixels SP1, SP2, and SP3. When the second electrode 150 is formed of a semi-transparent electrode, light is repeatedly reflected and re-reflected between the second electrode 150 and the reflective electrode RF and a microcavity effect may be obtained. Therefore, the light efficiency may be improved.

[0094] An encapsulation layer 160 is formed on the second electrode 150 to prevent external moisture from penetrating into the light-emitting layer 140. This encapsulation layer 160 may be formed of an inorganic insulating material or may be formed as a structure in which inorganic insulating materials and organic insulating materials are alternately stacked, but is not necessarily limited thereto.

[0095] A color filter layer 170 may be formed on the encapsulation layer 160. The color filter layer 170 may include a red color filter 171 disposed on the first sub-pixel SP1, a green color filter 172 disposed on the second sub-pixel SP2, and a blue color filter 173 disposed on the third sub-pixel SP3. Although not shown in the drawings, a black matrix is additionally formed between the color filter layers 170 to prevent light leakage at the boundaries between the plurality of sub-pixels SP1, SP2, and SP3.

[0096] Figure 4 is a cross-sectional view of the light-emitting layer. Figure 5 is Figure 2 an enlarged view of part A in

[0097] Referring to Figure 4 and Figure 5 , the light-emitting layer 140 may include a first stack 141 that generates first light, a charge generation layer 142 disposed on the first stack 141, and a second stack 143 disposed on the charge generation layer 142 that generates second light.

[0098] The first stack 141 may include a hole injection layer HIL, a first hole transport layer HTL1 disposed on the hole injection layer HIL, a first organic light-emitting layer EML1 disposed on the first hole transport layer HTL1, and a first electron transport layer ETL1 disposed on the first organic light-emitting layer EML1, but is not necessarily limited thereto. The first organic light-emitting layer EML1 may be composed of a yellow-green light-emitting layer or a blue light-emitting layer.

[0099] The charge generation layer 142 includes an n-type charge generation layer CGL1 disposed on the first stack 141 and a p-type charge generation layer CGL2 disposed on the n-type charge generation layer CGL1. The n-type charge generation layer CGL1 may supply electrons to the first stack 141, and the p-type charge generation layer CGL2 may supply holes to the second stack 143.

[0100] The second stack 143 may include a second hole transport layer HTL2 disposed on the charge generation layer 142, a second organic light-emitting layer EML2 disposed on the second hole transport layer HTL2, a second electron transport layer ETL2 disposed on the second organic light-emitting layer ETL2, and an electron injection layer EIL disposed on the second electron transport layer ETL2, but is not necessarily limited thereto. The second organic light-emitting layer EML2 may be composed of a blue light-emitting layer 140 or a yellow-green light-emitting layer 140.

[0101] However, the stacked structure of the light-emitting layer is not necessarily limited to this, and multiple stacks can be further provided. For example, a third stack (not shown) can be further provided on the second stack 143. In this case, the first stack 141 can emit blue light, the second stack 143 can emit green light, and the third stack can emit red light. In this case, the charge generation layer can be provided between the second stack and the third stack.

[0102] The charge generation layer 142 has relatively high conductivity compared to other layers. Therefore, when the charge generation layer 142 is connected between a plurality of sub-pixels SP1, SP2, and SP3 arranged adjacent to each other, there is a possibility of generating leakage current between the plurality of sub-pixels SP1, SP2, and SP3 arranged adjacent to each other through the charge generation layer 142.

[0103] Referring to Figure 5 , since the charge generation layer 142 is disconnected at the first trench 191 and the second trench 192, leakage current generation between a plurality of sub-pixels SP1, SP2, and SP3 arranged adjacent to each other can be prevented. In addition, at least a part of the second stack 143 can be continuously formed on the charge generation layer 142 and can not be disconnected by the first trench 191 and the second trench 192. Therefore, the second electrode 150 formed on the second stack 143 can not be inserted into the first trench 191 and the second trench 192. Thus, the problem of short circuit between the charge generation layer 142 and the second electrode 150 can be solved.

[0104] Figure 6 is a view showing a state where trenches provided between sub-pixels are connected to each other. Figure 7 is a view showing Figure 6 the point where the trenches in Figure 8 are connected to each other. Figure 7 is a cross-sectional view taken along line III-III' in

[0105] Referring to Figure 6 and Figure 7 , a trench T1 is formed between a plurality of sub-pixels SP1, SP2, and SP3, and all the trenches T1 formed between the plurality of sub-pixels SP1, SP2, and SP3 can be connected. However, according to this configuration, the width at the contact point portion CT1 where the trenches are connected may be relatively wide.

[0106] The width D2 of the contact point portion CT1 where trenches having a certain line width D1 are connected can be wider than a certain portion WP1 of the contact point (the point where the dotted lines intersect) where the trenches are ideally connected.

[0107] Referring to Figure 8, not only the first stack 141 of the light-emitting layer 140 and the charge generation layer 142 but also the second stack 143 can be completely disconnected at the contact point portion of the trench T1. Accordingly, when the second electrode 150 is formed on the light-emitting layer 140, the second electrode 150 can extend to the inside of the trench T1. As a result, current leakage may occur since the second electrode 150 contacts the disconnected charge generation layer 142.

[0108] On the other hand, in the display device according to the embodiment, since the two trenches provided between the sub-pixels are not connected to each other and extend in the second direction (Y-axis direction), there is no portion where the trenches are connected, and the width can be constant. Accordingly, the problem in which the second electrode 150 is inserted into the trench and short-circuited with the charge generation layer can be prevented.

[0109] Figure 9 is a view showing a first modified example of a trench according to an embodiment of the present disclosure. Figure 10 is a view showing a second modified example of a trench according to an embodiment of the present disclosure. Figure 11 is a view showing a third modified example of a trench according to an embodiment of the present disclosure.

[0110] Referring to Figure 9 , the first trench 191 and the second trench 192 may include first portions 191a and 192a extending in a direction parallel to the second direction (Y-axis direction), second portions 191b and 192b extending in a direction crossing the second direction (Y-axis direction), and bent regions R1 connecting the first portions 191a and 192a and the second portions 191b and 192b, and a curvature may be formed in each bent region R1.

[0111] The width of the trench may also increase at a portion bent during the patterning process. Accordingly, since the width of the bent region R1 of the trench is wide and the second electrode 150 is inserted, a short circuit with the charge generation layer may occur. According to the embodiment, since the curvature of the bent region R1 of the trench is formed and the trench is smoothly connected, a short circuit between the charge generation layer and the second electrode can be prevented even in the bent region R1 by keeping the trench width d21 in the straight region and the trench width d22 in the bent region relatively constant.

[0112] Referring to Figure 10 , the trench may include a plurality of divided trenches 194 respectively surrounding the sub-pixels. The plurality of divided trenches 194 may be provided to respectively surround the plurality of sub-pixels SP1, SP2, and SP3 and may be provided to be spaced apart from each other.

[0113] According to this configuration, since the dividing grooves 194 are provided in each of the plurality of sub-pixels SP1, SP2, and SP3, the number of sub-pixels and the number of grooves can be the same. In addition, two grooves can be provided between the plurality of sub-pixels SP1, SP2, and SP3 in the first direction (X-axis direction) and the diagonal directions (E1 direction and E2 direction). That is, the number of grooves in the first direction (X-axis direction) and the diagonal directions (E1 direction and E2 direction) can be the same.

[0114] Referring to Figure 11 , the groove may include a plurality of sub-grooves 194a surrounding the plurality of sub-pixels SP1, SP2, and SP3. According to this configuration, since there is no contact point connecting the sub-grooves 194a, the portion where the groove width becomes wider can be removed. A spacer portion 194b can be formed between the plurality of sub-grooves 194a.

[0115] The number of sub-grooves 194a can be variably changed according to the shape S1 of the sub-pixel. When the sub-pixel has a hexagonal shape, the number of sub-grooves 194a surrounding the sub-pixel can be six. When the sub-pixel has a triangular shape, the number of sub-grooves 194a surrounding the sub-pixel can be three.

[0116] According to this configuration, one groove can be provided between the plurality of sub-pixels SP1, SP2, and SP3 in both the first direction (X-axis direction) and the diagonal directions (E1 direction and E2 direction). That is, the number of grooves in the first direction (X-axis direction) and the diagonal directions (E1 direction and E2 direction) can be the same.

[0117] Figure 12 is a view showing sub-pixels of a display device according to another embodiment of the present disclosure.

[0118] Referring to Figure 12 , a display device according to an embodiment includes a plurality of sub-pixels SP1, SP2, and SP3 provided on a substrate 110 in a first direction (X-axis direction) and a second direction (Y-axis direction) perpendicular to the first direction (X-axis direction), and a first groove 191 and a second groove 192 provided between the plurality of sub-pixels SP1, SP2, and SP3 and extending in the second direction (Y-axis direction). The plurality of sub-pixels SP1, SP2, and SP3 may be formed in a quadrilateral shape, but the shape of the sub-pixel is not necessarily limited thereto.

[0119] The plurality of sub-pixels SP1, SP2, and SP3 may be provided in a plurality of pixel rows PL1, PL2, and PL3 provided in the first direction (X-axis direction). The plurality of pixel rows may be arranged to be spaced apart from each other in the second direction (Y-axis direction).

[0120] For example, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be sequentially arranged in the first pixel row PL1 in the first direction (X-axis direction). Additionally, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be sequentially arranged in the second pixel row PL2 in the first direction (X-axis direction).

[0121] The first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 may be sub-pixels having different colors. For example, the first sub-pixel SP1 may be a red sub-pixel, the second sub-pixel SP2 may be a green sub-pixel, and the third sub-pixel SP3 may be a blue sub-pixel. However, the present disclosure is not necessarily limited thereto, and the colors of the respective sub-pixels may be changed in various ways.

[0122] The multiple sub-pixels SP1, SP2, and SP3 arranged in the first pixel row PL1 and the multiple sub-pixels SP1, SP2, and SP3 arranged in the second pixel row PL2 may be arranged so as not to be aligned with each other. Therefore, the multiple sub-pixels SP1, SP2, and SP3 may be arranged in a zigzag shape in the second direction (Y-axis direction).

[0123] The multiple sub-pixels SP1, SP2, and SP3 may have sub-pixels of different colors arranged in the first direction (X-axis direction), the second direction (Y-axis direction), and the diagonal directions (E1 direction and E2 direction). The diagonal directions (E1 direction and E2 direction) may be directions that intersect the first direction (X-axis direction) and the second direction (Y-axis direction), and in these diagonal directions, the multiple sub-pixels SP1, SP2, and SP3 are sequentially arranged. The multiple sub-pixels SP1, SP2, and SP3 may have sub-pixels of different colors sequentially arranged in the first direction (X-axis direction) and sub-pixels of different colors sequentially arranged in the diagonal directions (E1 direction and E2 direction).

[0124] The first trench 191 and the second trench 192 may be provided between the multiple sub-pixels SP1, SP2, and SP3. The first trench 191 and the second trench 192 may extend in the second direction (Y-axis direction) and the first direction (X-axis direction) while being spaced apart from each other. In this case, the first trench 191 and the second trench 192 may be spaced apart from each other at a predetermined interval while extending in the second direction (Y-axis direction), and thus may not intersect each other.

[0125] The first groove 191 and the second groove 192 can be repeatedly formed on the substrate 110 to form a first spacer region SA1 having a first interval and a second spacer region SA2 having a second interval larger than the first interval. The plurality of first spacer regions SA1 and the plurality of second spacer regions SA2 can be alternately arranged in the second direction (Y-axis direction). Sub-pixels can be respectively arranged in the plurality of second spacer regions SA2. Therefore, since the light-emitting layer 140 of each sub-pixel is separated from the light-emitting layer 140 of an adjacent sub-pixel, leakage current can be blocked.

[0126] The first groove 191 and the second groove 192 can bend in a direction away from each other along the side surface of the sub-pixel while extending from the first pixel row PL1 to the second pixel row PL2. When the sub-pixel has a quadrilateral shape, the first groove 191 and the second groove 192 can bend in a direction away from each other in the second direction (Y-axis direction) between the first pixel row PL1 and the second pixel row PL2, and then can extend in the second direction (Y-axis direction). The first groove 191 and the second groove 192 can bend in a direction approaching each other and are arranged between adjacent sub-pixels when extending to the third pixel row PL3 as the next row.

[0127] Therefore, both the first groove 191 and the second groove 192 are arranged between the plurality of sub-pixels SP1, SP2, and SP3 arranged in the first direction (X-axis direction), but only one of the first groove 191 and the second groove 192 can be arranged between the plurality of sub-pixels SP1, SP2, and SP3 arranged in the diagonal direction (E1 direction and E2 direction).

[0128] According to an embodiment, the plurality of first grooves 191 and the plurality of second grooves 192 can extend in the second direction (Y-axis direction), alternately form the plurality of first spacer regions SA1 and the plurality of second spacer regions SA2, and the plurality of sub-pixels SP1, SP2, and SP3 can be arranged in each second spacer region SA2. Therefore, the plurality of sub-pixels SP1, SP2, and SP3 can be separated from the light-emitting layer 140 of adjacent sub-pixels in the first direction (X-axis direction) and the diagonal direction (E1 direction and E2 direction) to prevent leakage current.

[0129] Figure 13 It is a view showing sub-pixels of a display device according to another embodiment of the present disclosure. Figure 14 is Figure 13 an enlarged view of part B in Figure 15 is Figure 14 a modified example of

[0130] Refer to Figure 13 and Figure 14, the display device may include a first pixel group PG1 disposed in a first display area DA1 and a second pixel group PG2 disposed in a second display area DA2 surrounding the first display area DA1.

[0131] The first display area DA1 may be disposed in a central area, and the first pixel group PG1 disposed in the first display area DA1 may include a plurality of strip-shaped sub-pixels SP11, SP12, and SP13. The second display area DA2 may be an edge area surrounding the first display area DA1, and the second pixel group PG2 disposed in the second display area DA2 may include a plurality of sub-pixels SP21, SP22, and SP23 having a polygon shape. The sub-pixels SP21, SP22, and SP23 of the second pixel group PG2 may be arranged in a delta pixel structure.

[0132] The first display area DA1 may correspond to a focus area in a personal immersive device and may be an area for displaying an image at a first resolution. The second display area DA2 may be an outer peripheral area and may be an area for displaying an image at a second resolution lower than the first resolution. Therefore, the sizes of the plurality of sub-pixels SP21, SP22, and SP23 disposed in the second display area DA2 may be larger than the sizes of the plurality of sub-pixels SP11, SP12, and SP13 disposed in the first display area DA1.

[0133] A plurality of third trenches 193 extending in the second direction (Y-axis direction) may be disposed between the sub-pixels SP11, SP12, and SP13 of the first pixel group PG1. A plurality of first trenches 191 and a plurality of second trenches 192 extending in the second direction (Y-axis direction) may be disposed between the sub-pixels SP21, SP22, and SP23 of the second pixel group PG2. The plurality of third trenches 193 may be connected to one of the first trenches 191 and the second trenches 192.

[0134] The plurality of third trenches 193 may be connected to the plurality of first trenches 191 and the plurality of second trenches 192. According to this configuration, the leakage current of the sub-pixels SP11, SP12, and SP13 in the first display area DA1 may be blocked by the third trenches 193, and the leakage current of the sub-pixels SP21, SP22, and SP23 in the second display area DA2 may be blocked by the first trenches 191 and the second trenches 192.

[0135] A first interval region SA1 in which the first groove 191 and the second groove 192 are spaced apart from each other by a first interval and a second interval region SA2 in which the first groove 191 and the second groove 192 are spaced apart from each other by a second interval greater than the first interval may be provided, and a third interval region SA3 in which a plurality of third grooves 193 are spaced apart from each other by a third interval may be provided. The third interval region SA3 may be wider than the first interval region SA1 and narrower than the second interval region SA2.

[0136] In this case, at the boundary between the first display region DA1 and the second display region DA2, the sub-pixels SP11, SP12, and SP13 of the first display region DA1 and the sub-pixels SP21, SP22, and SP23 of the second display region DA2 may be set to face each other in the same color. For example, the third sub-pixel SP23 of the second display region DA2 may be disposed adjacent to the third sub-pixel SP13 of the first display region DA1 that is the rightmost one provided in Figure 14 the middle.

[0137] According to this configuration, even when there is no groove in the second direction (Y-axis direction) between the third sub-pixel SP13 of the first display region DA1 and the third sub-pixel SP23 of the second display region DA2, the third sub-pixel SP13 and the third sub-pixel SP23 have the same color, so color mixing can be prevented.

[0138] Referring to Figure 15 , the connection shape of the first groove 191, the second groove 192, and the third groove 193 may be modified in various ways according to the sizes and shapes of the sub-pixels of the first display region DA1 and the sub-pixels of the second display region DA2. In addition, the third groove 193 of the first display region DA1 and the first groove 191 and the second groove 192 of the second display region DA2 may be set in a disconnected state without connection.

[0139] Figure 16 is a view showing an example of a personal immersive device of a head-mounted display (HMD) type. The exterior of the personal immersive device is not limited to Figure 16 the example of

[0140] Referring to Figure 16 , the personal immersive device of the HMD type includes a main body 1000 and a head-mounted band 1100.

[0141] The main body 1000 may include the display panel of the above embodiments, a lens disposed opposite to the screen of the display panel, a display panel driver, a system controller, a plurality of sensors, etc. The main body 1000 may further include a camera. The lens may include an eyepiece or a fisheye lens. The display panel driver receives pixel data of an input image and drives the pixels to display the input image on the pixels of the display panel.

[0142] The system controller may include an external device interface connected to sensors, a camera, etc. and also connected to a memory or an external video source, a user interface for receiving user commands, and one or more processors connected to a power supply unit that generates power. The sensors include various sensors such as a gyro sensor, an acceleration sensor, etc. The sensors transmit the outputs of the various sensors to the system controller. The system controller may receive the outputs of the sensors to execute an algorithm for moving pixel data of an image displayed in the pixels of the display panel synchronously with the movement of the user and rendering following the fixation point of the user's eyes.

[0143] A personal immersive device may be implemented using a mobile terminal system such as a smartphone. In this case, the image for the left eye and the image for the right eye may be displayed together on the display panel of the mobile terminal system. In the case of a smartphone, a virtual reality (VR) mode is supported as an example of a partial mode. In the VR mode of the smartphone, the image for the left eye and the image for the right eye may be separated and displayed together on one display panel. In this case, Figure 16 the configuration of the main body 1000 may be simplified, and the mobile terminal system supporting the VR mode may be detachably mounted on the main body 1000.

[0144] Figure 17 is a block diagram showing an example of a display device applicable to a personal immersive device.

[0145] Referring to Figure 17 , the display device may include a first display panel 100A on which a left-eye image is displayed, and a second display panel 100B on which a right-eye image is displayed.

[0146] The display panels 100A and 100B include data lines DL, gate lines GL, and pixels PIX. The screens of the display panels 100A and 100B include a pixel array on which an image is displayed. The pixel array includes pixel rows L1 to Ln scanned sequentially by scan pulses shifted in a scanning direction to write pixel data.

[0147] The display panel driver may include data drivers 111 and 112, gate drivers 121 and 122, a controller 130, etc. For each of the display panels 100A and 100B, the data drivers 111 and 112 and the gate drivers 121 and 122 may be separate, and the controller 130 may be shared. The data drivers 111 and 112 convert the pixel data input from the controller 130 into voltage or current and supply data signals to the pixels. The gate drivers 121 and 122 sequentially output scan pulses synchronized with the data signals output from the data drivers 111 and 112 under the control of the controller 130.

[0148] According to an embodiment of the present disclosure, the problem of image quality degradation can be solved by blocking the leakage current generated between sub-pixels. Therefore, low-power driving can be achieved.

[0149] The effects according to this specification are not limited to the above effects, and other effects not mentioned can be clearly understood by those of ordinary skill in the art from the disclosure to be described below.

[0150] Since the essence features of the claims are not specifically pointed out in the content of the specification disclosed in the above technical problems to be solved, technical solutions, and effects, the scope of the claims is not limited by the items disclosed in the content of the specification.

[0151] Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments and can be modified in various ways without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to describe the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, the above embodiments should be understood as illustrative rather than restrictive in all aspects.

Claims

1. A display device, comprising: substrate; A plurality of sub-pixels are arranged on the substrate along a first direction and a second direction, wherein the first direction and the second direction intersect each other; as well as a first groove and a second groove, on the substrate, the first groove and the second groove are arranged between the plurality of sub-pixels and extend along the second direction, wherein, in the first region of the substrate, the first groove and the second groove are spaced apart from each other by a first interval, wherein, in the second region of the substrate, the first groove and the second groove are spaced apart from each other by a second interval larger than the first interval, and The plurality of sub-pixels are respectively disposed in the second regions.

2. The display device according to claim 1, wherein: The plurality of sub-pixels have different colors in the first direction and a diagonal direction crossing the first direction and the second direction.

3. The display device according to claim 2, wherein: The plurality of sub-pixels are arranged in a zigzag shape in the second direction.

4. The display device according to claim 2, wherein: The plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel having different colors, and The first sub-pixel is surrounded by the second sub-pixel and the third sub-pixel, and Centers of the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in a triangle shape.

5. The display device according to claim 1, wherein: Each of the plurality of sub-pixels has a polygonal shape, an elliptical shape, or a circular shape.

6. The display device according to claim 1, wherein: The plurality of sub-pixels include: A plurality of first sub-pixels arranged in a first pixel row; and A plurality of second sub-pixels are arranged in a second pixel row spaced apart from the first pixel row, and The plurality of first sub-pixels disposed in the first pixel row are disposed to be misaligned with the plurality of second sub-pixels disposed in the second pixel row in the second direction.

7. The display device according to claim 6, wherein: The first groove and the second groove are spaced apart from each other at the first interval in the first pixel row, are configured to bend away from each other, and are spaced apart from each other at the second interval in the second pixel row.

8. The display device according to claim 1, wherein: The plurality of sub-pixels include: a plurality of first electrodes disposed in the plurality of sub-pixels; A light emitting layer disposed on the plurality of first electrodes; and A second electrode disposed on the light-emitting layer, The plurality of sub-pixels are separated by the first trench and the second trench, and A portion of the light emitting layer is isolated by the first trench and the second trench.

9. The display device according to claim 8, wherein: The light emitting layer includes a first stack, a charge generating layer disposed on the first stack, and a second stack disposed on the charge generating layer, and The first stack and the charge generation layer are separated by the first trench and the second trench, and at least a portion of the second stack is continuous.

10. The display device according to claim 1, wherein: The first trench and the second trench do not intersect in the second direction.

11. The display device according to claim 1, wherein: Each of the first groove and the second groove includes a first portion extending in a direction parallel to the second direction, a second portion extending in a direction intersecting the second direction, and a bending region where the first portion and the second portion are connected, and Wherein, the substrate is configured to be bent at the bending area.

12. The display device according to claim 1, wherein: The second direction is perpendicular to the first direction.

13. The display device according to claim 1, wherein: The display device includes a first pixel group arranged in a first display area and a second pixel group arranged in a second display area surrounding the first display area, wherein the size of the plurality of sub-pixels arranged in the second pixel group is larger than the size of the plurality of sub-pixels arranged in the first pixel group, A plurality of third grooves extending along the second direction are arranged between the plurality of sub-pixels of the first pixel group, the first groove and the second groove are arranged between the plurality of sub-pixels of the second pixel group, and The display device further includes the plurality of third grooves spaced apart from each other at a third interval in a third region of the substrate, the third region being wider than the first region and narrower than the second region.

14. The display device according to claim 13, wherein: At a boundary between the first display area and the second display area, a plurality of sub-pixels of the first display area and a plurality of sub-pixels of the second display area face each other and have the same color.

15. The display device according to claim 13, wherein: The plurality of third trenches are connected to the first trench and the second trench.

16. The display device according to claim 13, wherein: The third trench is isolated from the first trench and the second trench.

17. A display device comprising: substrate; A plurality of sub-pixels are arranged on the substrate along a first direction and a second direction, wherein the second direction is perpendicular to the first direction; as well as A groove is arranged between the plurality of sub-pixels, The number of grooves between the plurality of sub-pixels arranged along the first direction is greater than or equal to the number of grooves between the plurality of sub-pixels arranged along a diagonal direction.

18. The display device according to claim 17, wherein: In the first direction and the diagonal direction, the plurality of sub-pixels have different colors, and The diagonal direction is a direction crossing the first direction and the second direction.

19. The display device according to claim 17, wherein: The grooves between the sub-pixels arranged along the first direction are connected to the grooves between the sub-pixels arranged along the diagonal direction.

20. The display device according to claim 17, wherein: Two first grooves are arranged between the plurality of sub-pixels arranged in the first direction, and A second groove is arranged between a plurality of sub-pixels arranged in the diagonal direction.

21. The display device according to claim 17, wherein: Two first grooves are arranged between the plurality of sub-pixels arranged in the first direction, and Two second grooves are arranged between the plurality of sub-pixels arranged in the diagonal direction.

22. The display device according to claim 17, wherein: A first groove is arranged between a plurality of sub-pixels arranged in the first direction, and A second groove is arranged between the plurality of sub-pixels arranged in the diagonal direction.

Images