Device transfer substrate, device transfer structure, and display device

Abstract

The present application provides a device transfer substrate, a device transfer structure and a display device comprising the device transfer substrate. The device transfer substrate comprises a plurality of recesses, wherein each of the plurality of recesses comprises a first area having a shape of a first pattern and a second area having a shape of a second pattern, wherein a portion of the first area partially overlaps with a portion of the second area to form an overlapping area, wherein a maximum width of the overlapping area in a direction intersecting a straight line passing through a center of the first pattern and a center of the second pattern is less than a diameter or a diagonal length of the first pattern and less than a diameter or a diagonal length of the second pattern.

Description

Technical Field

[0001] This disclosure relates to a device transfer substrate for arranging devices, a device transfer structure, and a display device, and more specifically, to a device transfer substrate for arranging devices capable of achieving high transfer yield, a device transfer structure including the device transfer substrate, and a display device manufactured using the device transfer substrate. Background Technology

[0002] Low-power and environmentally friendly light-emitting diodes (LEDs) have seen increased industrial demand and have been applied as display pixels, serving as pixels in display devices and as backlights for lighting devices or liquid crystal displays (LCDs). Recently, micro-LED display devices using micro-LED chips as pixels have been developed. In manufacturing display devices using micro-LED chips, a pick-and-place method has been used to transfer the micro-LEDs; however, with this method, productivity decreases as the size of the micro-LEDs decreases and the size of the display increases. Summary of the Invention

[0003] A device transfer substrate is provided for arranging devices to transfer multiple light-emitting devices with high yield.

[0004] A device transfer structure is provided in which multiple light-emitting devices are transferred and arranged using a device transfer substrate for arranging devices.

[0005] A display device is provided that is manufactured using multiple light-emitting devices arranged in a device transfer structure.

[0006] Other aspects will be set forth in part in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of this disclosure.

[0007] According to one aspect of this disclosure, a device transfer substrate includes a plurality of grooves, each of the plurality of grooves including: a first region having a first pattern shape; and a second region having a second pattern shape, wherein a portion of the first region partially overlaps with a portion of the second region to form an overlapping region, and wherein the maximum width of the overlapping region in a direction intersecting a straight line passing through the center of the first pattern and the center of the second pattern is less than the diameter or diagonal length of the first pattern and less than the diameter or diagonal length of the second pattern.

[0008] The area of ​​the overlapping region can be greater than 0 and less than or equal to 1 / 2 of the area of ​​the first shape.

[0009] The distance between the center of the first figure and the center of the second figure can be greater than or equal to half the diameter or diagonal length of the first figure, and can be less than half the diameter or diagonal length of the first figure and half the diameter or diagonal length of the second figure.

[0010] The distance between the center of the first figure and the center of the second figure can be greater than or equal to 2 / 3 of the diameter or diagonal length of the first figure, and can be less than 1 / 2 of the diameter or diagonal length of the first figure and 1 / 2 of the diameter or diagonal length of the second figure.

[0011] The difference between the diameter or diagonal length of the first figure and the diameter or diagonal length of the second figure can be less than or equal to approximately 20% of the diameter or diagonal length of the first figure.

[0012] The first and second figures can be circular or polygonal in shape.

[0013] Both the first and second shapes can be quadrilaterals, and the first and second regions can be configured such that the perimeter of the vertices of the first shape overlaps with the perimeter of the vertices of the second shape, or such that the perimeter of the vertices of the first shape overlaps with the perimeter of one side of the second shape.

[0014] Both the first and second shapes can have a trapezoidal shape, and the first and second regions can be configured such that the periphery of the vertex of the shorter side of the first shape overlaps with the periphery of the vertex of the shorter side of the second shape, or such that the periphery of the vertex of the longer side of the first shape overlaps with the periphery of the vertex of the longer side of the second shape.

[0015] Each of the plurality of grooves may further include a third region having a third shape, and the third region may be configured to partially overlap with the second region but not with the first region.

[0016] The device transfer substrate may further include barriers surrounding the boundaries of each of the plurality of recesses.

[0017] A first and second region of a groove may be surrounded by a barrier such that, within the groove, the first and second regions are connected to each other based on an overlapping area.

[0018] According to one aspect of this disclosure, a device transfer structure includes: a device transfer substrate including a plurality of grooves; and a light-emitting device disposed in each of the plurality of grooves, wherein each of the plurality of grooves includes: a first region having a first pattern shape; and a second region having a second pattern shape, wherein a portion of the first region partially overlaps with a portion of the second region to form an overlapping region, wherein the light-emitting device disposed in each of the plurality of grooves is disposed in either the first region or the second region, and wherein the maximum width of the overlapping region in a direction intersecting a straight line passing through the center of the first pattern and the center of the second pattern is less than the diameter or diagonal length of the first pattern and less than the diameter or diagonal length of the second pattern, such that the light-emitting device disposed in each of the plurality of grooves does not pass through the overlapping region.

[0019] The area of ​​the overlapping region can be greater than 0 and less than or equal to 1 / 2 of the area of ​​the first shape.

[0020] The distance between the center of the first figure and the center of the second figure can be greater than or equal to half the diameter or diagonal length of the first figure, and can be less than half the diameter or diagonal length of the first figure and half the diameter or diagonal length of the second figure.

[0021] The distance between the center of the first figure and the center of the second figure can be greater than or equal to 2 / 3 of the diameter or diagonal length of the first figure, and can be less than 1 / 2 of the diameter or diagonal length of the first figure and 1 / 2 of the diameter or diagonal length of the second figure.

[0022] The difference between the diameter or diagonal length of the first figure and the diameter or diagonal length of the second figure can be less than or equal to approximately 20% of the diameter or diagonal length of the first figure.

[0023] The diameter or diagonal length of the first pattern can be greater than the diameter or diagonal length of the light-emitting device, and the difference between the diameter or diagonal length of the first pattern and the diameter or diagonal length of the light-emitting device can be less than or equal to 20% of the diameter or diagonal length of the light-emitting device.

[0024] The difference between the diameter or diagonal length of the first pattern and the diameter or diagonal length of the light-emitting device can be less than or equal to 5 μm.

[0025] The area of ​​the overlapping region can be smaller than the area of ​​the light-emitting device.

[0026] The size of the light-emitting device can range from 5μm to 100μm.

[0027] Each of the plurality of grooves in the device transfer substrate may further include a third region having a third pattern, wherein the third region is configured to partially overlap with the second region and not overlap with the first region, and wherein the light-emitting device is disposed only in the second region or in at least one of the first and third regions.

[0028] Each of the plurality of grooves may further include: a first electrode pair, including a first driving electrode and a second driving electrode disposed in the first region; and a second electrode pair, including a third driving electrode and a fourth driving electrode disposed in the second region, and the light-emitting device may be electrically connected to either the first electrode pair or the second electrode pair.

[0029] The device transfer substrate may further include barriers surrounding the boundary of each of the plurality of recesses.

[0030] A first and second region of a groove may be surrounded by a barrier, such that the first and second regions are connected in the groove based on an overlapping area.

[0031] According to one aspect of this disclosure, a display device includes: a display substrate including a driving circuit and a plurality of sub-pixels arranged in two dimensions; and a plurality of light-emitting devices disposed on the display substrate, wherein each of the plurality of sub-pixels includes a first region and a second region on the display substrate that partially overlap each other, and wherein the plurality of light-emitting devices are irregularly disposed in any one of the first region and the second region of the plurality of sub-pixels.

[0032] The display device may further include: a first electrode pair, including a first driving electrode and a second driving electrode disposed in a first region; and a second electrode pair, including a third driving electrode and a fourth driving electrode disposed in a second region, wherein when the light-emitting device is disposed in the first region, the light-emitting device is electrically connected to the first electrode pair but not electrically connected to the second electrode pair, wherein when the light-emitting device is disposed in the second region, the light-emitting device is electrically connected to the second electrode pair but not electrically connected to the first electrode pair.

[0033] The display device may further include a wavelength conversion layer configured to convert the wavelength of light emitted from the plurality of light-emitting devices.

[0034] The wavelength conversion layer may include: a first wavelength conversion layer configured to convert light emitted from the plurality of light-emitting devices into light having a first wavelength band; and a second wavelength conversion layer configured to convert light emitted from the plurality of light-emitting devices into light having a second wavelength band different from the first wavelength band.

[0035] The display device may further include a color filter layer comprising: a first color filter layer configured to face the first wavelength conversion layer and to transmit light having a first wavelength band; and a second color filter layer configured to face the second wavelength conversion layer and to transmit light having a second wavelength band.

[0036] According to one aspect of this disclosure, a device transfer substrate may include a plurality of grooves, each of the plurality of grooves including a first end having a first width, a second end having a second width, and an intermediate portion between the first end and the second end, the intermediate portion having an intermediate width, wherein the intermediate width is less than the first width and the intermediate width is less than the second width.

[0037] The first end may have the shape of a first graphic and the second end may have the shape of a second graphic, and the first graphic and the second graphic may partially overlap to form the middle part. Attached Figure Description

[0038] The above and other aspects, features and advantages of certain embodiments of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 This is a perspective view schematically showing a device transfer structure according to one embodiment;

[0040] Figure 2 It is a schematic cross-sectional view showing the structure of the light-emitting device;

[0041] Figure 3 yes Figure 1 An enlarged schematic plan view of a portion of the device transfer structure shown;

[0042] Figure 4 It is shown in detail in Figure 1 A plan view of the shape of the groove provided in the device transfer substrate of the device transfer structure shown;

[0043] Figure 5 and Figure 6 It is shown schematically. Figure 1 A partial cross-sectional view of the device transfer structure shown;

[0044] Figure 7 This is a perspective view illustrating a method for arranging light-emitting devices using a fluid self-assembly method;

[0045] Figure 8 The diagram illustrates the scanning process of arranging light-emitting devices through physical contact with a rod or scraper.

[0046] Figure 9A and Figure 9BThis is a plan view showing the shape of the groove in a device transfer substrate according to one embodiment;

[0047] Figure 10A and Figure 10B This is a plan view showing the shape of the groove in a device transfer substrate according to one embodiment;

[0048] Figures 11A to 11D This is a plan view showing the shape of the groove in a device transfer substrate according to one embodiment;

[0049] Figures 12A to 12D This is a plan view showing the shape of the groove in a device transfer substrate according to one embodiment;

[0050] Figures 13A to 13C This is a plan view showing the shape of the groove in a device transfer substrate according to one embodiment;

[0051] Figures 14A to 14C This is a plan view showing the shape of the groove of the device transfer substrate and the shape of the light-emitting device according to one embodiment;

[0052] Figure 15 It is a cross-sectional view schematically illustrating the process of transferring light-emitting devices arranged on a device transfer substrate onto a display substrate of a display device;

[0053] Figures 16A to 16C It is a plan view showing various arrangements of electrode pairs that can be electrically connected to light-emitting devices transferred on a display substrate;

[0054] Figure 17 This is a schematic cross-sectional view showing the arrangement of electrode pairs on a device transfer structure according to one embodiment.

[0055] Figure 18 This is a plan view showing the arrangement of a plurality of light-emitting devices on a display substrate of a display device according to one embodiment;

[0056] Figure 19 This is a schematic cross-sectional view illustrating the structure of a display device according to one embodiment;

[0057] Figure 20 This is a schematic cross-sectional view illustrating the structure of a display device according to one embodiment;

[0058] Figure 21 This is a schematic block diagram of an electronic device according to one embodiment;

[0059] Figure 22 An example of a display device according to an embodiment being applied to a mobile device is shown;

[0060] Figure 23An example of a display device according to an embodiment being applied to a vehicle display device is shown;

[0061] Figure 24 An example of a display device according to an embodiment being applied to augmented reality glasses or virtual reality glasses is shown;

[0062] Figure 25 An example of a display device applied to a sign according to an embodiment is shown; and

[0063] Figure 26 An example of a display device applied to a wearable display according to an embodiment is shown. Detailed Implementation

[0064] Reference will now be made in detail to embodiments, examples of which are shown in the accompanying drawings, wherein the same reference numerals always refer to the same elements. In this respect, embodiments may take different forms and should not be construed as limited to the description set forth herein. Therefore, the embodiments are described below only by reference to the accompanying drawings to illustrate various aspects. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of…” before a column of elements modify the entire column of elements, not individual elements within that column.

[0065] In the following description, the device transfer substrate, device transfer structure, and display device for arranging devices will be described in detail with reference to the accompanying drawings. In the following drawings, the same reference numerals refer to the same components, and the dimensions of each component may be exaggerated for clarity and convenience. The embodiments described herein are merely examples, and various modifications can be made from these embodiments.

[0066] When describing a component as "above" or "on" another component, that component may be directly above the other component, or a third component may be inserted between them. Unless the context clearly specifies otherwise, singular expressions include plural expressions. When a part "includes" another component, it may mean that the part does not exclude other components, but may further include other components, unless otherwise stated.

[0067] The use of the terms “a,” “an,” and “the,” and similar designations, can encompass both the singular and plural. Unless there is an explicit statement indicating that the steps in the method should be performed in the described order, the steps constituting the method may be performed in any suitable order, not limited to the described order.

[0068] In addition, terms such as “unit” or “module” disclosed in the specification refer to a unit for performing at least one function or operation, which can be implemented by hardware, software or a combination thereof.

[0069] The connecting lines or connectors shown in the various figures are intended to represent example functional relationships and / or physical or logical connections between various components. It should be noted that many alternative or additional functional relationships, physical connections, or logical connections may exist in actual devices.

[0070] Furthermore, all examples and example terms are used only to describe the technical ideas in detail, and the scope of this disclosure is not limited by these terms except as limited by the claims.

[0071] Figure 1 This is a perspective view schematically illustrating a device transfer structure 100 according to an example embodiment. (Refer to...) Figure 1 The device transfer structure 100 may include a device transfer substrate 110 for arranging devices. The device transfer substrate 110 has a plurality of grooves 115 and light-emitting devices 120 respectively disposed in the grooves 115.

[0072] Figure 2 This is a schematic cross-sectional view showing the structure of the light-emitting device 120. (Refer to...) Figure 2 The light-emitting device 120 may include a first semiconductor layer 121, a light-emitting layer 122 disposed on the upper surface of the first semiconductor layer 121, a second semiconductor layer 123 disposed on the upper surface of the light-emitting layer 122, an insulating layer 124 disposed on the upper surface of the second semiconductor layer 123, a first device electrode 125 disposed on the upper surface of the insulating layer 124 and electrically connected to the second semiconductor layer 123, and a second device electrode 126 disposed on the upper surface of the insulating layer 124 and electrically connected to the first semiconductor layer 121.

[0073] The first semiconductor layer 121 and the second semiconductor layer 123 may comprise, for example, group III-V or group II-VI compound semiconductors. The first semiconductor layer 121 and the second semiconductor layer 123 may provide electrons and holes to the light-emitting layer 122. For this purpose, the first semiconductor layer 121 and the second semiconductor layer 123 may be electrically doped in opposite ways. For example, the first semiconductor layer 121 may be n-type doped and the second semiconductor layer 123 may be p-type doped, or the first semiconductor layer 121 may be p-type doped and the second semiconductor layer 123 may be n-type doped.

[0074] The light-emitting layer 122 has a quantum well structure, wherein the quantum wells are disposed between potential barriers. Light can be generated as electrons and holes supplied from the first semiconductor layer 121 and the second semiconductor layer 123 recombine in the quantum wells within the light-emitting layer 122. The wavelength of the light generated by the light-emitting layer 122 can be determined based on the band gap of the material forming the quantum wells in the light-emitting layer 122. The light-emitting layer 122 may have only one quantum well or may have a multiple quantum well (MQW) structure in which multiple quantum wells and multiple potential barriers are alternately disposed. The thickness of the light-emitting layer 122 or the number of quantum wells in the light-emitting layer 122 can be appropriately selected considering the driving voltage and luminous efficiency of the light-emitting device.

[0075] To facilitate the arrangement of the light-emitting device 120 using the fluid self-assembly or dry self-assembly methods described later, both the first device electrode 125 and the second device electrode 126 can be disposed on one surface of the light-emitting device 120 (e.g., on the same surface). For example, an insulating layer 124 can be formed on the upper surface of the second semiconductor layer 123, and the first device electrode 125 and the second device electrode 126 can be disposed on the upper surface of the insulating layer 124. To electrically connect the second device electrode 126 to the first semiconductor layer 121, the light-emitting device 120 may further include a via hole through the second semiconductor layer 123 and the light-emitting layer 122. The insulating layer 124 can extend to surround the sidewall of the via hole. In other words, the portion of the second semiconductor layer 123 exposed by the via hole and the portion of the light-emitting layer 122 exposed by the via hole can be covered by the insulating layer 124. The second device electrode 126 can extend from the upper surface of the insulating layer 124 to the upper surface of the first semiconductor layer 121 exposed through the via hole to contact the first semiconductor layer 121 through the via hole. The first device electrode 125 may be configured to penetrate the insulating layer 124 and contact the second semiconductor layer 123. Furthermore, a portion of the first device electrode 125 may extend laterally on the upper surface of the insulating layer 124.

[0076] The light-emitting device 120 can have small dimensions on a microscale. For example, the size of the light-emitting device 120 can be in the range of 5 μm to 100 μm. Alternatively, the size of the light-emitting device 120 can be in the range of 20 μm to 50 μm or in the range of 5 μm to 20 μm. Here, the size can be defined as the diameter of the light-emitting device 120, the width W of the longer side, or the square root of the area. Furthermore, the diameter or width W of the longer side of the light-emitting device 120 can be greater than the thickness T of the light-emitting device 120. For example, the ratio of the diameter or width W of the longer side of the light-emitting device 120 to the thickness T of the light-emitting device 120 can be 1 or greater, or 5 or greater.

[0077] Return to reference Figure 1The device transfer substrate 110 is used to arrange the light-emitting device 120 by a fluid or dry self-assembly method, and the recess 115 in which the light-emitting device is disposed can be provided on the upper surface of the device transfer substrate 110. Figure 1 As shown, the grooves 115 can be arranged in a two-dimensional array on the upper surface of the device transfer substrate 110, and the light-emitting devices can be arranged in the grooves 115 respectively.

[0078] Figure 3 yes Figure 1 A magnified schematic plan view of a portion of the device transfer structure 100 shown. (Refer to...) Figure 3 Each recess 115 may include a first region 115a (e.g., a first end) and a second region 115b (e.g., a second end) in which a light-emitting device 120 may be disposed. The light-emitting device 120 may reside only in one of the first region 115a and the second region 115b of each recess 115. In other words, a total of two light-emitting devices 120 may not be accommodated in either recess 115. For this purpose, the first region 115a and the second region 115b may partially overlap each other.

[0079] To facilitate the bonding of the first device electrode 125 and the second device electrode 126 of the light-emitting device 120 to corresponding electrodes on the display substrate during the manufacturing process of the display device, the first device electrode 125 and the second device electrode 126 may have symmetrical shapes. The first device electrode 125 may be disposed at the center of the light-emitting device 120. The first device electrode 125 may have a circular shape. However, this disclosure is not limited thereto; the first device electrode 125 may have a quadrilateral or other polygonal shape. The second device electrode 126 may be disposed at the edge of the light-emitting device 120. The second device electrode 126 may have a symmetrical shape with respect to the first device electrode 125. For example, the second device electrode 126 may be disposed at two vertex regions facing each other in the diagonal direction.

[0080] Figure 4 It is shown in detail in Figure 1 A plan view showing the shape of the groove 115 in the device transfer substrate 110 of the device transfer structure 100. (Refer to...) Figure 4Each groove 115 has: a first region 115a having a first pattern shape; and a second region 115b having a second pattern shape, wherein a portion of the first region 115a and a portion of the second region 115b spatially overlap to form an overlapping region 116 (e.g., a middle portion). In a groove 115, the first region 115a and the second region 115b may be connected to each other based on the overlapping region 116. Therefore, for ease of description, the first region 115a, the second region 115b, and the overlapping region 116 are separated, but can actually be combined to form the interior space of a groove 115.

[0081] The first and second figures can have the same size and shape, but are not limited to this. Although the first and second figures are... Figure 4 The first and second shapes are shown as squares, but this disclosure is not limited thereto. The first and second shapes may have shapes similar to, but not limited to, the horizontal cross-sectional shape of the light-emitting device 120. The first and second shapes may have shapes and dimensions in which the light-emitting device 120 can be stably positioned in the first region 115a or the second region 115b. For example, the first and second shapes may have circular shapes or various polygonal shapes, such as rectangles, squares, trapezoids, and hexagons. Furthermore, the horizontal cross-section of the light-emitting device 120 may also have a circular shape or various polygonal shapes, such as rectangles, squares, trapezoids, and hexagons.

[0082] According to one embodiment, the area of ​​each of the first and second patterns can be larger than the cross-sectional area of ​​the light-emitting device 120, such that the light-emitting device 120 can be accommodated in the first region 115a or the second region 115b. For example, the diameter or diagonal length of each of the first and second patterns can be larger than the diameter or diagonal length of the light-emitting device 120. In particular, the difference between the diameter or diagonal length of each of the first and second patterns and the diameter or diagonal length of the light-emitting device 120 can be less than or equal to about 20% of the diameter or diagonal length of the light-emitting device 120. Alternatively, the difference between the diameter or diagonal length of each of the first and second patterns and the diameter or diagonal length of the light-emitting device 120 can be greater than 0 μm and less than or equal to about 5 μm. Furthermore, the dimensions of the first and second patterns can be the same or different within a certain range. For example, the difference between the diameter or diagonal length of the first pattern and the diameter or diagonal length of the second pattern can be less than or equal to about 20% of the diameter or diagonal length of the first pattern.

[0083] When the light-emitting device 120 first enters the first region 115a, no additional light-emitting device 120 can enter the second region 115b, and vice versa. Therefore, a portion of the first region 115a and a portion of the second region 115b can spatially overlap each other. Furthermore, when both the first region 115a and the second region 115b are empty, the light-emitting device 120 can enter only either the first region 115a or the second region 115b, but cannot enter only the overlapping region. Therefore, the area of ​​the overlapping region 116 can be greater than 0 and smaller than the area of ​​the light-emitting device 120.

[0084] Furthermore, the maximum width W1 (e.g., middle width) of the overlapping region 116 in a direction intersecting (e.g., perpendicularly) with a straight line passing through the center C1 of the first shape and the center C2 of the second shape can be greater than 0 and can be less than the maximum width, diameter, or diagonal length W2 of the first region 115a (e.g., first width) and the second region 115b (e.g., second width) in that direction. Therefore, each groove 115 can have a recessed shape in its middle portion. Thus, once the light-emitting device 120 is positioned in the first region 115a or the second region 115b, the light-emitting device 120 cannot move to the other region via the overlapping region 116 in the groove 115. For example, when the light-emitting device 120 is first positioned in the first region 115a, the light-emitting device 120 subsequently cannot move to the second region 115b via the overlapping region 116 in the groove 115, and when the light-emitting device 120 is first positioned in the second region 115b, the light-emitting device 120 subsequently cannot move to the first region 115a via the overlapping region 116 in the groove 115.

[0085] Furthermore, if the spatial overlap between the first region 115a and the second region 115b is too large, that is, if the center C1 of the first pattern and the center C2 of the second pattern are too close, it may be difficult to mount the driving electrodes of the display substrate, which will be described below, so that they do not overlap. Therefore, the distance d between the center C1 of the first pattern and the center C2 of the second pattern can be sufficiently large. For example, the distance d between the center C1 of the first pattern and the center C2 of the second pattern can be greater than or equal to half the diameter or diagonal length W2 of the first pattern, and can be less than the sum of half the diameter or diagonal length of the first pattern and half the diameter or diagonal length of the second pattern. Alternatively, the distance between the center C1 of the first pattern and the center C2 of the second pattern can be greater than or equal to two-thirds the diameter or diagonal length of the first pattern, and can be less than the sum of half the diameter or diagonal length of the first pattern and half the diameter or diagonal length of the second pattern. In addition, the area of ​​the overlapping region 116 can be greater than 0 and less than or equal to half the area of ​​the first pattern or less than or equal to half the area of ​​the second pattern.

[0086] Figure 5 and Figure 6 It is shown schematically. Figure 1 A partial cross-sectional view of the device transfer structure 100 is shown. Specifically, Figure 5 It is along Figure 1 The sectional view taken by line A-A'. Figure 6 It is along Figure 1 The sectional view taken along line B-B'. (Refer to...) Figure 5 and Figure 6 The device transfer substrate 110 may include barriers 111 surrounding the boundaries of each recess 115. A first region 115a and a second region 115b of a recess 115 may be surrounded by barriers 111 such that the first region 115a and the second region 115b of a recess 115 may be connected to each other based on an overlapping region 116 within the barriers 111. The bottom surface 112 of each recess 115 may extend along the first region 115a and the second region 115b and may have a smooth surface with little or no curvature.

[0087] Additionally, refer to Figure 5 The maximum width, diameter, or diagonal length W3 of the first region 115a and the second region 115b in a direction intersecting (e.g., perpendicularly) a straight line passing through the center C1 of the first pattern and the center C2 of the second pattern can be slightly larger than the width W4 of the light-emitting device 120 in that direction. For example, the maximum width, diameter, or diagonal length W3 of the first region 115a and the second region 115b in a direction intersecting a straight line passing through the center C1 of the first pattern and the center C2 of the second pattern can be about 20% larger than the width W4 of the light-emitting device 120. Alternatively, the difference between the maximum width, diameter, or diagonal length W3 of each of the first region 115a and the second region 115b in a direction intersecting a straight line passing through the center C1 of the first pattern and the center C2 of the second pattern and the diameter or diagonal length W4 of the light-emitting device 120 can be greater than 0 μm and less than or equal to about 5 μm. Therefore, the light-emitting device 120 housed in the recess 115 can move only within a limited range within the recess 115, specifically within the first region 115a or the second region 115b.

[0088] Reference Figure 6 The light-emitting device 120 can be disposed in either the first region 115a or the second region 115b, and the other of the first region 115a or the second region 115b that does not have the light-emitting device 120 can be empty. Figure 4As shown, since the width of the overlapping region 116 at the center of the direction passing through the center C1 of the first pattern and the center C2 of the second pattern is narrower than the width of the first region 115a and the second region 115b, once the light-emitting device 120 enters one of the first region 115a and the second region 115b, the light-emitting device 120 cannot move to the other of the second region 115b and the first region 115a, and can only move within a limited range within the first region 115a or the second region 115b.

[0089] In the recess 115 of the device transfer substrate, the light-emitting device 120 can be arranged, for example, by a fluid self-assembly method or a dry self-assembly method. Figure 7 This is a perspective view illustrating a method for arranging the light-emitting device 120 using a fluid self-assembly method. (Refer to...) Figure 7 The light-emitting device 120 can be provided on the upper surface of the device transfer substrate 110 having grooves 115 arranged in two dimensions. The light-emitting device 120 can be directly dispersed onto the device transfer substrate 110 after the liquid is supplied to the grooves 115 of the device transfer substrate 110, or it can be included in a suspension and supplied onto the device transfer substrate 110.

[0090] The light-emitting device 120 supplied on the device transfer substrate 110 passes through or across the groove 115 in the device transfer substrate 110 by external stimuli (such as ultrasound, vibration, magnetic field, fluid flow, and physical contact according to the transfer method). For example, Figure 8 The scanning process of arranging the light-emitting device 120 by physical contact with the rod or scraper 10 is schematically shown. As the light-emitting device 120 passes through or across the groove 115, the light-emitting device 120 is grasped by the capillary force generated by the liquid L in the groove 115 and positioned in the groove 115 as the liquid L evaporates, or is blocked by the edge of the groove 115 to be placed inside the groove 115.

[0091] As described above, a recess 115 of the device transfer substrate according to the embodiment has two regions for accommodating the light-emitting device 120, namely, a first region 115a and a second region 115b. According to a fluid self-assembly method or a dry self-assembly method, the light-emitting device 120 can be disposed in either the first region 115a or the second region 115b with a high probability. Therefore, compared to the case where one recess includes a accommodating region having a size similar to that of the light-emitting device 120, the transfer yield when arranging the light-emitting device 120 on the device transfer substrate 110 can be improved. Furthermore, since only one light-emitting device 120 enters one recess 115, the amount of light-emitting device 120 used can be reduced by almost half compared to the case where two light-emitting devices are excessively disposed in one unit of the display device.

[0092] Figure 9A and Figure 9B This is a plan view showing the shape of the recess 115 of the device transfer substrate according to one embodiment. Figure 4 In the example of the groove 115 shown, the first shape of the first region 115a and the second shape of the second region 115b are both squares, and the first region 115a and the second region 115b are arranged such that the periphery of a vertex of the first shape and the periphery of a vertex of the second shape overlap each other. However, the groove 115 can have various other shapes and arrangements. For example, see... Figure 9A and Figure 9B The first shape in the first region 115a and the second shape in the second region 115b can both be squares, and the first region 115a and the second region 115b can be configured such that the periphery of a vertex of the first shape and the periphery of one side of the second shape overlap each other. In other words, the first region 115a and the second region 115b can be configured such that one of the first shape and the second shape is rotated relative to the other.

[0093] Figure 10A and Figure 10B This is a plan view showing the shape of the recess 115 of the device transfer substrate according to one embodiment. (Refer to...) Figure 10A and Figure 10B The first pattern in the first region 115a and the second pattern in the second region 115b can both be circular. In this case, the cross-section of the light-emitting device 120 can also be circular. The second device electrode 126 of the light-emitting device 120 can be arranged in a ring shape along the edge of the upper surface of the light-emitting device 120.

[0094] Figures 11A to 11D This is a plan view showing the shape of the recess 115 of the device transfer substrate 110 according to one embodiment. (Refer to...) Figures 11A to 11D Both the first pattern in the first region 115a and the second pattern in the second region 115b can have a trapezoidal shape. In this case, the cross-section of the light-emitting device 120 can also have a trapezoidal shape. The second device electrode 126 of the light-emitting device 120 can be disposed at a vertex region of the longer side of the trapezoidal shape, and the first device electrode 125 can be disposed at a vertex region of the shorter side of the trapezoidal shape. Furthermore, the first device electrode 125 and the second device electrode 126 can be disposed along the diagonal direction of the trapezoid. Therefore, when the light-emitting device 120 has a trapezoidal shape, the first device electrode 125 and the second device electrode 126 can be disposed asymmetrically.

[0095] like Figure 11A and Figure 11BAs shown, the first region 115a and the second region 115b can be arranged such that the periphery of a vertex of the shorter side of the first shape and the periphery of a vertex of the shorter side of the second shape overlap each other. Specifically, the first region 115a and the second region 115b can be configured such that the peripheries of the vertices of the two vertices of the shorter side corresponding to the position of the first device electrode 125 of the light-emitting device 120 overlap each other. Therefore, regardless of which of the first region 115a and the second region 115b the light-emitting device 120 is located in, the first device electrode 125 of the light-emitting device 120 can always be positioned in the overlapping region 116 of the first region 115a and the second region 115b.

[0096] Or, such as Figure 11C and Figure 11D As shown, the first region 115a and the second region 115b can be configured such that the periphery of a vertex of the longer side of the first shape and the periphery of a vertex of the longer side of the second shape overlap each other. Specifically, the first region 115a and the second region 115b can be configured such that the peripheries of the vertices of the two vertices of the longer side corresponding to the position of the second device electrode 126 of the light-emitting device 120 overlap each other. Therefore, regardless of whether the light-emitting device 120 is located in either the first region 115a or the second region 115b, the second device electrode 126 of the light-emitting device 120 can always be positioned in the overlapping region 116 of the first region 115a and the second region 115b.

[0097] Figures 12A to 12D This is a plan view showing the shape of a recess 115 in a device transfer substrate 110 according to one embodiment. So far, a recess 115 has been described having two overlapping regions, but this disclosure is not limited thereto; a recess 115 may have three or more overlapping regions. (See also...) Figures 12A to 12D A recess 115 may include a first region 115a having a first graphic shape, a second region 115b having a second graphic shape, and a third region 115c having a third graphic shape. For example, the first to third graphics may each have a square shape, and the light-emitting device 120 may also have a square shape. The first region 115a and the second region 115b may partially overlap each other in space, and the second region 115b and the third region 115c may partially overlap each other in space. However, the first region 115a and the third region 115c may not overlap each other.

[0098] In addition, such as Figure 12A and Figure 12BAs shown, the first region 115a to the third region 115c can be configured such that the periphery of a vertex of the first shape and the periphery of a vertex of the second shape overlap each other, and the periphery of another vertex of the second shape and the periphery of a vertex of the third shape overlap each other. Alternatively, as... Figure 12C and Figure 12D As shown, the first region 115a to the third region 115c can be configured such that the periphery of one side of the first shape and the periphery of a vertex of the second shape overlap each other, and the periphery of the vertex of the second shape opposite to said vertex and the periphery of one side of the third shape overlap each other. Furthermore, the first and third shapes can be shapes that are rotated relative to each other.

[0099] When a groove 115 has three or more overlapping regions, the light-emitting device 120 can be disposed in at least one of the first region 115a to the third region 115c. Figure 12A and 12C As shown, when the light-emitting device 120 is disposed in the middle second region 115b, the light-emitting device 120 is not disposed in the first region 115a and the third region 115c. Figure 12B and 12D As shown, when the light-emitting device 120 is disposed in the first region 115a, the light-emitting device 120 may not be disposed in the second region 115b, but may be further disposed in the third region 115c. Furthermore, when the light-emitting device 120 is disposed in the third region 115c, the light-emitting device 120 may not be disposed in the second region 115b, but may be disposed in the first region 115a. In other words, the light-emitting device 120 may be disposed only in the second region 115b, or may be disposed in at least one of the first region 115a and the third region 115c. Therefore, when the groove 115 comprises n regions and each of the n regions overlaps with another adjacent region (n is a natural number greater than 2), 1 to n-1 light-emitting devices 120 may be disposed in one groove 115.

[0100] Figures 13A to 13C This is a plan view showing the shape of the recess 115 of the device transfer substrate according to one embodiment. (Refer to...) Figures 13A to 13C The first to third figures in regions 115a, 115b, and 115c can be circular. Even in this case, the above reference... Figures 12A to 12D The given description can also be applied as is. For example... Figure 13A and Figure 13B As shown, the centers of the first to third figures can lie on a straight line. However, this disclosure is not limited to this. For example, as Figure 13CAs shown, the angle θ between the line segment connecting the center of the first figure and the center of the second figure and the line segment connecting the center of the second figure and the center of the third figure can be in the range of 90 degrees to 180 degrees.

[0101] Figures 14A to 14C This is a plan view showing the shape of the recess 115 of the device transfer substrate 110 and the shape of the light-emitting device 120 according to one embodiment. In the above embodiment, the shape of the light-emitting device 120 is similar to the shape of the patterns of the various regions of the recess 115, but is not limited thereto. For example, the first to third patterns of the first to third regions 115a, 115b, and 115c may have a square shape, and the light-emitting device 120 may have a circular shape. The shape of the recess 115 and the shape of the light-emitting device 120 may be... Figures 14A to 14C Combinations of other shapes not shown. The first to third patterns may have any shape and size in which the light-emitting device 120 can be stably positioned in each of the first to third regions 115a, 115b and 115c.

[0102] The light-emitting device 120 disposed on the device transfer substrate 110 can be transferred to the display substrate of the display device to manufacture the display device. In this case, the device transfer substrate 110 can be a transfer substrate for transferring the light-emitting device 120 to the display substrate of the display device. Figure 15 This is a cross-sectional view schematically illustrating the process of transferring a light-emitting device 120 arranged on a device transfer substrate 110 onto a display substrate 210.

[0103] Reference Figure 15 The display substrate 210 may include a plurality of first electrode pairs 211 and a plurality of second electrode pairs 212. The plurality of first electrode pairs 211 are respectively disposed in the regions on the display substrate 210 corresponding to the first region 115a of the recess 115, and the plurality of second electrode pairs 212 are respectively disposed in the regions on the display substrate 210 corresponding to the second region 115b of the recess 115. Each of the first electrode pairs 211 may include a first driving electrode 211a and a second driving electrode 211b, and each of the second electrode pairs 212 may include a third driving electrode 212a and a fourth driving electrode 212b. When the light-emitting device 120 disposed in the recess 115 of the device transfer substrate 110 is transferred to the display substrate 210, it is unknown in advance which of the first region 115a and the second region 115b the light-emitting device 120 will be positioned in. Therefore, the first electrode pairs 211 and the second electrode pairs 212 may be provided at the positions on the display substrate 210 corresponding to the first region 115a and the second region 115b, respectively.

[0104] The light-emitting device 120 can be electrically connected to either the first electrode pair 211 or the second electrode pair 212. For example, the light-emitting device 120 disposed in the first region 115a is electrically connected to the first electrode pair 211, but may not be electrically connected to the second electrode pair 212. Furthermore, the light-emitting device 120 disposed in the second region 115b may not be electrically connected to the first electrode pair 211, but may be electrically connected to the second electrode pair 212. In other words, the light-emitting device 120 can be electrically connected only to either the first electrode pair 211 or the second electrode pair 212 in the region corresponding to a recess 115 on the display substrate 210, and may not be electrically connected to the other of the first electrode pair 211 and the second electrode pair 212.

[0105] The display substrate 210 may include further driving circuitry, which includes a plurality of thin-film transistors (TFTs) for independently controlling the light-emitting devices 120. For example, the TFTs may be disposed in the display substrate 210 below the first electrode pair 211 and the second electrode pair 212, and the TFTs may be electrically connected to the first electrode pair 211 and the second electrode pair 212 via wiring. Specifically, the driving circuitry may be configured to simultaneously apply the same driving signal to the first electrode pair 211 and the second electrode pair 212, respectively disposed in regions on the display substrate 210 corresponding to a recess 115. Thus, regardless of whether the light-emitting device 120 is positioned in either the first region 115a or the second region 115b, the light-emitting device 120 disposed in each recess 115 can operate as if the light-emitting device 120 were located at the same position or in the same sub-pixel on the display substrate 210.

[0106] The device transfer substrate 110 can be configured such that the first device electrode 125 and the second device electrode 126 of the light-emitting device 120 face the display substrate 210. Furthermore, the device transfer substrate 110 can press against the display substrate 210 such that the first device electrode 125 of the light-emitting device 120 contacts the first driving electrode 211a or the third driving electrode 212a, and the second device electrode 126 contacts the second driving electrode 211b or the fourth driving electrode 212b. Thereafter, the first device electrode 125 can be bonded to the first driving electrode 211a or the third driving electrode 212a, and the second device electrode 126 can be bonded to the second driving electrode 211b or the fourth driving electrode 212b, using a bonding material such as solder bumps. In this way, when the light-emitting device 120 is completely fixed to the display substrate 210, the device transfer substrate can be separated from the light-emitting device 120.

[0107] According to the above embodiments, the light-emitting device 120 can be transferred to the device transfer substrate 110 or the display substrate 210 with high yield, while using a relatively small number of light-emitting devices 120. Therefore, the manufacturing cost of display devices that include a very large number of light-emitting devices 120 can be reduced.

[0108] Figures 16A to 16C This is a plan view showing various arrangements of electrode pairs that can be electrically connected to the light-emitting device 120 transferred to the display substrate 210.

[0109] Reference Figure 16A When the light-emitting device 120 has a square shape and the first shape of the first region 115a and the second shape of the second region 115b of the groove 115 have square shapes, the first driving electrode 211a and the third driving electrode 212a can be respectively disposed on the display substrate 210 at positions corresponding to the center of the first pattern and the center of the second pattern. Additionally, the second driving electrode 211b can be disposed on the display substrate 210 at positions corresponding to the three vertices of the first pattern that are not located in the overlapping region, and the fourth driving electrode 212b can be disposed on the display substrate 210 at positions corresponding to the three vertices of the second pattern that are not located in the overlapping region.

[0110] The first wiring 211c and the third wiring 212c can be connected to the first driving electrode 211a and the third driving electrode 212a, respectively. The first wiring 211c can extend between two adjacent second driving electrodes 211b on the display substrate 210 or extend below the display substrate 210 through a via. The third wiring 212c can extend between two adjacent fourth driving electrodes 212b on the display substrate 210 or extend below the display substrate 210 through a via. Furthermore, the second wiring 211d and the fourth wiring 212d can be connected to the second driving electrodes 211b and the fourth driving electrode 212b, respectively. The second wiring 211d can extend from the display substrate 210 in the outward direction of the first pattern or extend below the display substrate 210 through a via. The fourth wiring 212d can extend from the display substrate 210 in the outward direction of the second pattern or extend below the display substrate 210 through a via. According to this electrode arrangement method, the first to fourth driving electrodes 211a, 211b, 212a, and 212b can be arranged separately from each other without the possibility of short circuit.

[0111] Reference Figure 16BWhen the light-emitting device 120 has a circular shape and the first pattern of the first region 115a and the second pattern of the second region 115b of the groove 115 have circular shapes, the first driving electrode 211a and the third driving electrode 212a can be respectively disposed at positions corresponding to the center of the first pattern and the center of the second pattern. Furthermore, two or more second driving electrodes 211b are disposed on the display substrate 210 at positions corresponding to the edge portions of the first pattern that are not located in the overlapping region, and two or more fourth driving electrodes 212b can be disposed on the display substrate 210 at positions corresponding to the edge portions of the second pattern that are not located in the overlapping region.

[0112] Reference Figure 16C The light-emitting device 120 has a trapezoidal shape. The first pattern of the first region 115a and the second pattern of the second region 115b of the recess 115 have trapezoidal shapes. The first region 115a and the second region 115b can be configured such that the peripheries of the vertices corresponding to the positions of the first device electrode 125 of the light-emitting device 120 on the two vertices of the shorter sides of the first and second patterns overlap each other. In this case, the first driving electrode 211a can be disposed on the display substrate 210 at a position corresponding to the overlapping region 116, and the second driving electrode 211b and the fourth driving electrode 212b can be disposed on the display substrate 210 at positions corresponding to the two vertices of the longer sides of the first and second patterns in the diagonal direction of the overlapping region 116. In this configuration, the first electrode pair 211 and the second electrode pair 212 can share a single first driving electrode 211a. In other words, the first electrode pair 211 can include the first driving electrode 211a and the second driving electrode 211b, and the second electrode pair 212 can include the first driving electrode 211a and the fourth driving electrode 212b.

[0113] In addition, it can be done in Figure 1 The device transfer structure 100 shown is used to manufacture a display device by directly setting the driving electrode on it without transferring the light-emitting device 120 to a separate display substrate 210. In this case, the device transfer substrate 110 can serve both as a mounting surface for the light-emitting device 120 and as a display substrate for the display device. Figure 17 This is a schematic cross-sectional view illustrating the arrangement of electrode pairs on a device transfer structure 100 according to one embodiment. (Refer to...) Figure 17An insulating layer 216 can be formed on a device transfer substrate 110 on which the light-emitting device 120 is disposed. Furthermore, a plurality of first electrode pairs 211 and a plurality of second electrode pairs 212 can be formed on the insulating layer 216. Since it is unknown in advance which of the first region 115a and the second region 115b the light-emitting device 120 will be located, the first electrode pairs 211 and the second electrode pairs 212 can be formed on the device transfer substrate 110 at positions corresponding to the first region 115a and positions corresponding to the second region 115b, respectively.

[0114] The first electrode pair 211 may include a first driving electrode 211a and a second driving electrode 211b, and the second electrode pair 212 may include a third driving electrode 212a and a fourth driving electrode 212b. For electrical connection to the light-emitting device 120, the first to fourth driving electrodes 211a, 211b, 212a, and 212b may extend into the insulating layer 216. Then, either the first electrode pair 211 or the second electrode pair 212 in a recess 115 is electrically connected to the light-emitting device 120, while the other is not electrically connected to any light-emitting device.

[0115] The driving circuitry, including the TFT for independently controlling the light-emitting device 120, can be further included in the device transfer substrate 110. Therefore, the device transfer substrate 110 can be used as a display substrate for a display device. The first to fourth driving electrodes 211a, 211b, 212a, and 212b can be connected to the driving circuitry inside the device transfer substrate 110 through vias in the insulating layer 216. Furthermore, Figures 16A to 16C The arrangement of the driving electrodes shown can be applied to Figure 17 The implementation method is shown in the figure.

[0116] Figure 18 This is a plan view showing the arrangement of light-emitting devices 120 on a display substrate 210 of a display device 200 according to one embodiment. (Refer to...) Figure 18 The display device 200 may include a display substrate 210 and a light-emitting device 120 disposed on the display substrate 210. The display substrate 210 includes a plurality of two-dimensionally arranged pixels 200P. Each pixel 200P may include three sub-pixels 200R, 200G, and 200B disposed adjacent to each other. Therefore, the display substrate 210 may include a plurality of sub-pixels 200R, 200G, and 200B arranged two-dimensionally on the display substrate 210. The sub-pixels 200R, 200G, and 200B may emit red light, green light, and blue light, respectively.

[0117] Each sub-pixel 200R, 200G, and 200B may include a first region 200a and a second region 200b that partially overlap each other on the display substrate 210. The first region 200a and the second region 200b of the sub-pixels 200R, 200G, and 200B may respectively correspond to the first region 115a and the second region 115b of the recess 115 of the device transfer substrate 110. Figure 18 As shown, multiple light-emitting devices 120 can be irregularly arranged in any one of the first region 200a and the second region 200b of sub-pixels 200R, 200G and 200B.

[0118] As referenced above Figure 15 and Figure 17 The display device 200 may further include a first electrode pair 211 and a second electrode pair 212. The first electrode pair 211 includes a first driving electrode 211a and a second driving electrode 211b disposed in the first region 200a. The second electrode pair 212 includes a third driving electrode 212a and a fourth driving electrode 212b disposed in the second region 200b. The light-emitting device 120 disposed in the first region 200a may be electrically connected to the first electrode pair 211 but may not be electrically connected to the second electrode pair 212. The light-emitting device 120 disposed in the second region 200b may not be electrically connected to the first electrode pair 211 but may be electrically connected to the second electrode pair 212.

[0119] Figure 19 This is a schematic cross-sectional view illustrating the structure of a display device 200 according to one embodiment. (Refer to...) Figure 19 The display device 200 may include a display substrate 210, a light-emitting device 120 mounted on the display substrate 210, and a wavelength conversion layer 220 disposed on the light-emitting device 120. Furthermore, the display device 200 may further include an upper substrate 230 disposed on the wavelength conversion layer 220. The wavelength conversion layer 220 may include a first wavelength conversion layer 220R that converts light emitted from the light-emitting device 120 into light having a first wavelength band, a second wavelength conversion layer 220G that converts light emitted from the light-emitting device 120 into light having a second wavelength band different from the first wavelength band, and a third wavelength conversion layer 220B that converts light emitted from the light-emitting device 120 into light having a third wavelength band different from the first and second wavelength bands. For example, the light having the first wavelength band may be red light, the light having the second wavelength band may be green light, and the light having the third wavelength band may be blue light. The first wavelength conversion layer 220R, the second wavelength conversion layer 220G, and the third wavelength conversion layer 220B may be separated from each other, with a partition 221 between them, and may each face the corresponding semiconductor light-emitting device 120.

[0120] When the light-emitting device 120 emits blue light, the third wavelength conversion layer 220B may include a resin that transmits blue light. The second wavelength conversion layer 220G can convert the blue light emitted from the light-emitting device 120 to emit green light. The second wavelength conversion layer 220G may include quantum dots or phosphors that are excited by blue light to emit green light. The first wavelength conversion layer 220R can convert the blue light emitted from the light-emitting device 120 to red light for emission. The first wavelength conversion layer 220R may include quantum dots or phosphors that are excited by blue light to emit red light.

[0121] The quantum dots included in the first wavelength conversion layer 220R or the second wavelength conversion layer 220G can have a core-shell structure with a core and a shell, or they can have a particulate structure without a shell. The core-shell structure can include a single-shell structure or a multi-shell structure, such as a double-shell structure. The quantum dots can include group II-VI semiconductors, group III-V semiconductors, group IV-VI semiconductors, group IV semiconductors, and / or graphene quantum dots. The quantum dots can include, for example, Cd, Se, Zn, S, and / or InP, and each quantum dot can have a diameter of tens of nm or smaller, for example, about 10 nm or smaller. The quantum dots included in the first wavelength conversion layer 220R and the second wavelength conversion layer 220G can have different sizes.

[0122] Figure 20 This is a schematic cross-sectional view illustrating the structure of a display device 300 according to one embodiment. (Refer to...) Figure 20 The display device 300 may further include a cover layer 250 on the wavelength conversion layer 220 and a color filter layer 240 on the cover layer 250. The cover layer 250 and the color filter layer 240 may be disposed in... Figure 19 The display device 200 shown is located between the wavelength conversion layer 220 and the upper substrate 230. A color filter layer 240 includes a first color filter 240R, a second color filter 240G, and a third color filter 240B, separated from each other, with a black matrix 241 located between them. The first color filter 240R, the second color filter 240G, and the third color filter 240B face the first wavelength conversion layer 220R, the second wavelength conversion layer 220G, and the third wavelength conversion layer 220B, respectively. The first color filter 240R, the second color filter 240G, and the third color filter 240B transmit red light, green light, and blue light, respectively, and absorb other colors of light. When the color filter layer 240 is provided, light other than red light emitted from the first wavelength conversion layer 220R without wavelength conversion or light other than green light emitted from the second wavelength conversion layer 220G without wavelength conversion can be removed by the first color filter 240R and the second color filter 240G respectively, thereby increasing the color purity of the display device 300.

[0123] The aforementioned display device can be applied to various electronic devices with screen display functions. Figure 21 This is a schematic block diagram of an electronic device 8201 according to one embodiment. (Refer to...) Figure 21 An electronic device 8201 can be provided in a network environment 8200. In the network environment 8200, the electronic device 8201 can communicate with another electronic device 8202 via a first network 8298 (such as a short-range wireless communication network), or with another electronic device 8204 and / or a server 8208 via a second network 8299 (such as a long-range wireless communication network). The electronic device 8201 can communicate with the electronic device 8204 via the server 8208. The electronic device 8201 may include a processor 8220, a memory 8230, an input device 8250, an audio output device 8255, a display device 8260, an audio module 8270, a sensor module 8276, an interface 8277, a haptic module 8279, a camera module 8280, a power management module 8288, a battery 8289, a communication module 8290, a subscriber identification module (SIM) 8296, and / or an antenna module 8297. Some of these components of electronic device 8201 may be omitted, or other components may be added to electronic device 8201. Some of these components may be implemented as an integrated circuit. For example, sensor module 8276 (fingerprint sensor, iris sensor, illuminance sensor, etc.) may be included in display device 8260 (display, etc.).

[0124] Processor 8220 can execute software (program 8240, etc.) to control one or more other components (hardware, software components, etc.) in electronic device 8201 connected to processor 8220 and perform various data processing or operations. As part of the data processing or operation, processor 8220 can load instructions and / or data received from other components (sensor module 8276, communication module 8290, etc.) into volatile memory 8232, process the instructions and / or data stored in volatile memory 8232, and store the result data in non-volatile memory 8234. Non-volatile memory 8234 may include internal memory 8236 installed in electronic device 8201 and removable external memory 8238. Processor 8220 may include main processor 8221 (central processing unit, application processor, etc.) and auxiliary processor 8223 (graphics processing unit, image signal processor, sensor central processor, communication processor, etc.) that can operate independently or together with main processor 8221. The auxiliary processor 8223 can use less power than the main processor 8221 and can perform specialized functions.

[0125] When the main processor 8221 is not activated (sleep state), the auxiliary processor 8223 can replace the main processor 8221 in controlling the functions and / or states related to some components of the electronic device 8201 (display device 8260, sensor module 8276, communication module 8290, etc.), or when the main processor 8221 is activated (application execution state), it works with the main processor 8221 to control the functions and / or states related to some components of the electronic device 8201 (display device 8260, sensor module 8276, communication module 8290, etc.). The auxiliary processor 8223 (image signal processor, communication processor, etc.) can be implemented as part of other functionally related components (camera module 8280, communication module 8290, etc.).

[0126] The memory 8230 can store various data required by the components of the electronic device 8201 (processor 8220, sensor module 8276, etc.). This data may include, for example, software (program 8240, etc.) and input and / or output data for commands associated with it. The memory 8230 may include volatile memory 8232 and / or non-volatile memory 8234.

[0127] The program 8240 can be stored as software in the memory 8230 and may include an operating system 8242, middleware 8244 and / or application 8246.

[0128] Input device 8250 can receive commands and / or data from outside the electronic device 8201 (such as from a user) to be used by components (such as the processor 8220 of the electronic device 8201). Input device 8250 may include a remote control, microphone, mouse, keyboard, and / or digital pen (such as a stylus).

[0129] Audio output device 8255 can output audio signals to the outside of electronic device 8201. Audio output device 8255 may include a speaker and / or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback, while the receiver can be used to answer incoming calls. The receiver can be integrated into the speaker or can be implemented as a separate, independent device.

[0130] The display device 8260 can visually provide information to the outside of the electronic device 8201. The display device 8260 may include a display, a holographic device, or a projector, as well as control circuitry for controlling the corresponding device. The display device 8260 may include driving circuitry, light-emitting devices, side-reflecting structures, bottom-reflecting structures, etc. The display device 8260 may further include touch circuitry configured to detect touch and / or sensor circuitry (pressure sensor, etc.) configured to measure the intensity of the force generated by the touch.

[0131] Audio module 8270 can convert sound into electrical signals, or conversely, convert electrical signals into sound. Audio module 8270 can acquire sound through input device 8250 and output sound through speakers and / or headphones of another electronic device (electronic device 8202, etc.) directly or wirelessly connected to audio output device 8255 and / or electronic device 8201.

[0132] Sensor module 8276 can detect the operating status (power, temperature, etc.) or external environmental status (user status, etc.) of electronic device 8201, and generate electrical signals and / or data values ​​corresponding to the detected status. Sensor module 8276 may include gesture sensors, gyroscope sensors, atmospheric pressure sensors, magnetic sensors, accelerometers, grip sensors, proximity sensors, color sensors, infrared (IR) sensors, biometric sensors, temperature sensors, humidity sensors, and / or illuminance sensors.

[0133] Interface 8277 may support one or more specified protocols that can be used for electronic device 8201 to connect directly or wirelessly to another electronic device (e.g., electronic device 8202). Interface 8277 may include a High Definition Multimedia Interface (HDMI), a Universal Serial Bus (USB) interface, an SD card interface, and / or an audio interface.

[0134] Connection end 8278 may include a connector through which electronic device 8201 can be physically connected to another electronic device (such as electronic device 8202). Connection end 8278 may include an HDMI connector, a USB connector, an SD card connector, and / or an audio connector (such as a headphone connector).

[0135] The haptic module 8279 can convert electrical signals into mechanical stimuli (vibration, motion, etc.) or electrical stimuli that can be perceived by the user through touch or kinesthesia. The haptic module 8279 may include a motor, a piezoelectric element, and / or an electrical stimulation device.

[0136] Camera module 8280 can capture still images and video. Camera module 8280 may include a lens assembly comprising one or more lenses, an image sensor, an image signal processor, and / or a flash. The lens assembly included in camera module 8280 can collect light emitted from the object to be imaged.

[0137] The power management module 8288 can manage the power supplied to the electronic device 8201. The power management module 8288 can be implemented as part of a power management integrated circuit (PMIC).

[0138] Battery 8289 can power components of electronic device 8201. Battery 8289 may include a non-rechargeable primary battery, a rechargeable secondary battery, and / or a fuel cell.

[0139] Communication module 8290 can establish direct (wired) communication channels and / or wireless communication channels between electronic device 8201 and other electronic devices (electronic device 8202, electronic device 8204, server 8208, etc.), and supports communication through the established communication channels. Communication module 8290 may include one or more communication processors that operate independently of processor 8220 (application processor, etc.) and support direct and / or wireless communication. Communication module 8290 may include wireless communication module 8292 (cellular communication module, short-range wireless communication module, Global Navigation Satellite System (GNSS) communication module, etc.) and / or wired communication module 8294 (local area network (LAN) communication module, power line communication module, etc.). Among these communication modules, the corresponding communication module can communicate with another electronic device through a first network 8298 (short-range communication network, such as Bluetooth, WiFi Direct, or Infrared Data Association (IrDA)) or a second network 8299 (long-range communication network, such as cellular network, Internet, or computer network (LAN), WAN, etc.). These various types of communication modules can be integrated into a single component (a single chip, etc.) or implemented as multiple components (multiple chips) that are separate from each other. The wireless communication module 8292 can use user information (International Mobile Subscriber Identity (IMSI) etc.) stored in the user identification module 8296 to verify and authenticate electronic device 8201 in a communication network such as a first network 8298 and / or a second network 8299.

[0140] Antenna module 8297 can transmit signals and / or power to or receive signals and / or power from external sources (such as other electronic devices). The antenna may include a radiator comprising conductive patterns formed on a board (printed circuit board (PCB), etc.). Antenna module 8297 may include one or more antennas. When multiple antennas are included, communication module 8290 can select from the multiple antennas an antenna suitable for a communication method used in a communication network such as a first network 8298 and / or a second network 8299. Signals and / or power can be transmitted or received between communication module 8290 and other electronic devices via the selected antenna. Components other than antennas (RFIC, etc.) may be included as part of antenna module 8297.

[0141] Some components can connect to each other and exchange signals (commands, data, etc.) through communication methods (bus, general purpose input and output (BPIO), serial peripheral interface (SPI), mobile industrial processor interface (MIPI)).

[0142] Commands or data can be sent or received between electronic devices 8201 and 8204 via server 8208 connected to the second network 8299. Other electronic devices 8202 and 8204 can be the same as or different types of devices than electronic device 8201. All or some operations performed by electronic device 8201 can be performed by one or more of the other electronic devices 8202 and 8204. For example, when electronic device 8201 needs to perform a function or service, it can request one or more other electronic devices to perform part or all of that function or service, instead of performing it itself. Upon receiving a request, one or more other electronic devices can perform additional functions or services related to the request and send the results to electronic device 8201. Cloud computing, distributed computing, and / or client-server computing technologies can be used for this purpose.

[0143] Figure 22 An example of a display device according to an embodiment applied to a mobile device 9100 is shown. The mobile device 9100 may include a display device 9110, and the display device 9110 may include the aforementioned driving circuit, light-emitting device, side-reflecting structure, down-reflecting structure, etc. The display device 9110 may have a foldable structure, such as a multi-folding structure.

[0144] Figure 23 An example of a display device according to an embodiment applied to a vehicle display device is shown. The display device may be a head-up display device 9200 for a vehicle and may include a display 9210 provided in the vehicle area and a light path changing member 9220 for changing the light path so that the driver can see the image generated by the display 9210.

[0145] Figure 24 An example of a display device according to an embodiment applied to augmented reality (AR) glasses 9300 or virtual reality glasses is shown. AR glasses 9300 may include a projection system 9310 for forming an image and an element 9320 for guiding the image from the projection system 9310 to the user's eyes. The projection system 9310 may include the aforementioned driving circuitry, light-emitting device, side-reflection structure, down-reflection structure, etc.

[0146] Figure 25 An example of a display device applied to a signboard 9400 according to an embodiment is shown. The signboard 9400 can be used for outdoor advertising using a digital information display and the advertising content can be controlled via a communication network, etc. For example, it can be referenced above... Figure 21 The described electronic device is used to implement signage 9400.

[0147] Figure 26An example of a display device according to an embodiment applied to a wearable display 9500 is shown. The wearable display 9500 may include the aforementioned driving circuit, light-emitting device, side-reflective structure, down-reflective structure, etc., and can be referenced above... Figure 21 The electronic device described is used to achieve this.

[0148] The display device according to one example embodiment can be applied to a variety of products, such as rollable TVs, stretchable displays, etc.

[0149] It should be understood that the embodiments described herein should be considered descriptive only and not for limiting purposes. Descriptions of features or aspects in each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

[0150] This application is based on and claims priority to Korean Patent Application No. 10-2021-0154288, filed with the Korean Intellectual Property Office on November 10, 2021, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A device transfer substrate for accommodating a light-emitting device, the device transfer substrate comprising: Multiple grooves, Each of the plurality of grooves includes: A first region having the shape of a first graphic; and The second region having the shape of the second graphic. A portion of the first region partially overlaps with a portion of the second region to form an overlapping region, such that only one of the first and second regions accommodates the light-emitting device. The maximum width of the overlapping region in the direction intersecting the straight line passing through the center of the first graphic and the center of the second graphic is less than the diameter or diagonal length of the first graphic and less than the diameter or diagonal length of the second graphic.

2. The device transfer substrate according to claim 1, wherein, The area of ​​the overlapping region is greater than 0 and less than or equal to 1 / 2 of the area of ​​the first shape.

3. The device transfer substrate according to claim 1, wherein, The distance between the center of the first shape and the center of the second shape is greater than or equal to half the diameter or diagonal length of the first shape, and less than the sum of half the diameter or diagonal length of the first shape and half the diameter or diagonal length of the second shape.

4. The device transfer substrate according to claim 1, wherein, The distance between the center of the first shape and the center of the second shape is greater than or equal to 2 / 3 of the diameter or diagonal length of the first shape, and less than the sum of 1 / 2 of the diameter or diagonal length of the first shape and 1 / 2 of the diameter or diagonal length of the second shape.

5. The device transfer substrate according to claim 1, wherein, The difference between the diameter or diagonal length of the first shape and the diameter or diagonal length of the second shape is less than or equal to 20% of the diameter or diagonal length of the first shape.

6. The device transfer substrate according to claim 1, wherein, The first graphic and the second graphic have circular or polygonal shapes.

7. The device transfer substrate according to claim 1, wherein, Both the first and second figures have a quadrilateral shape, and The first region and the second region are configured such that the periphery of the vertex of the first shape overlaps with the periphery of the vertex of the second shape, or such that the periphery of the vertex of the first shape overlaps with the periphery of one side of the second shape.

8. The device transfer substrate according to claim 1, wherein, Both the first and second figures have a trapezoidal shape, and The first region and the second region are configured such that the periphery of the vertices of the shorter side of the first shape overlaps with the periphery of the vertices of the shorter side of the second shape, or such that the periphery of the vertices of the longer side of the first shape overlaps with the periphery of the vertices of the longer side of the second shape.

9. The device transfer substrate according to claim 1, in, Each of the plurality of grooves further includes a third region having a third graphic shape, and The third region is configured to partially overlap with the second region but not with the first region.

10. The device transfer substrate of claim 1, further comprising a barrier surrounding the boundary of each of the plurality of recesses.

11. The device transfer substrate according to claim 10, wherein, The first and second regions of a groove are surrounded by the barrier, such that the first and second regions are connected to each other in the groove based on the overlapping region.

12. A device transfer structure, comprising: A device transfer substrate including multiple grooves; as well as A light-emitting device is disposed in each of the plurality of grooves. Each of the plurality of grooves includes: A first region having the shape of a first graphic; and The second region having the shape of the second graphic. A portion of the first region partially overlaps with a portion of the second region to form an overlapping region. The light-emitting device disposed in each of the plurality of grooves is disposed in only one of the first region and the second region, and Wherein, the maximum width of the overlapping region in the direction intersecting the straight line passing through the center of the first pattern and the center of the second pattern is less than the diameter or diagonal length of the first pattern and less than the diameter or diagonal length of the second pattern, such that the light-emitting device disposed in each of the plurality of grooves does not pass through the overlapping region.

13. The device transfer structure according to claim 12, wherein, The area of ​​the overlapping region is greater than 0 and less than or equal to 1 / 2 of the area of ​​the first shape.

14. The device transfer structure according to claim 12, wherein, The distance between the center of the first shape and the center of the second shape is greater than or equal to half the diameter or diagonal length of the first shape, and less than the sum of half the diameter or diagonal length of the first shape and half the diameter or diagonal length of the second shape.

15. The device transfer structure according to claim 12, wherein, The distance between the center of the first shape and the center of the second shape is greater than or equal to 2 / 3 of the diameter or diagonal length of the first shape, and less than the sum of 1 / 2 of the diameter or diagonal length of the first shape and 1 / 2 of the diameter or diagonal length of the second shape.

16. The device transfer structure according to claim 12, wherein, The difference between the diameter or diagonal length of the first shape and the diameter or diagonal length of the second shape is less than or equal to 20% of the diameter or diagonal length of the first shape.

17. The device transfer structure according to claim 12, in, The diameter or diagonal length of the first pattern is greater than the diameter or diagonal length of the light-emitting device, and Wherein, the difference between the diameter or diagonal length of the first pattern and the diameter or diagonal length of the light-emitting device is less than or equal to 20% of the diameter or diagonal length of the light-emitting device.

18. The device transfer structure according to claim 12, wherein, The difference between the diameter or diagonal length of the first pattern and the diameter or diagonal length of the light-emitting device is less than or equal to 5 μm.

19. The device transfer structure according to claim 12, wherein, The area of ​​the overlapping region is smaller than the area of ​​the light-emitting device.

20. The device transfer structure according to claim 12, wherein, The size of the light-emitting device is in the range of 5μm to 100μm.

21. The device transfer structure according to claim 12, in, Each of the plurality of recesses in the device transfer substrate further includes a third region having a third pattern shape. The third region is configured to partially overlap with the second region but not with the first region. The light-emitting device is disposed only in the second region or in at least one of the first region and the third region.

22. The device transfer structure according to claim 12, wherein, Each of the plurality of grooves further includes: The first electrode pair includes a first driving electrode and a second driving electrode disposed in the first region; and The second electrode pair includes a third driving electrode and a fourth driving electrode disposed in the second region, and The light-emitting device is electrically connected to either the first electrode pair or the second electrode pair.

23. The device transfer structure according to claim 12, wherein, The device transfer substrate further includes a barrier surrounding the boundary of each of the plurality of grooves.

24. The device transfer structure of claim 23, wherein the first region and the second region of one of the grooves are surrounded by the barrier, such that the first region and the second region are connected in the groove based on the overlapping region.

25. A display device, comprising: The display substrate includes a driving circuit and multiple sub-pixels arranged in two dimensions; as well as Multiple light-emitting devices are disposed on the display substrate. Each of the plurality of sub-pixels includes a first region and a second region that partially overlap each other on the display substrate, and The plurality of light-emitting devices are irregularly arranged in only one of the first region and the second region of the plurality of sub-pixels.

26. The display device according to claim 25, further comprising: The first electrode pair includes a first driving electrode and a second driving electrode disposed in the first region; as well as The second electrode pair includes a third driving electrode and a fourth driving electrode disposed in the second region. Wherein, when the light-emitting device is disposed in the first region, the light-emitting device is electrically connected to the first electrode pair and not electrically connected to the second electrode pair, and When the light-emitting device is disposed in the second region, the light-emitting device is electrically connected to the second electrode pair and not electrically connected to the first electrode pair.

27. The display device of claim 25, further comprising a wavelength conversion layer configured to convert the wavelength of light emitted from the plurality of light-emitting devices.

28. The display device according to claim 27, wherein, The wavelength conversion layer includes: A first wavelength conversion layer is configured to convert light emitted from the plurality of light-emitting devices into light having a first wavelength band; and The second wavelength conversion layer is configured to convert light emitted from the plurality of light-emitting devices into light having a second wavelength band different from the first wavelength band.

29. The display device according to claim 28, further comprising a color filter layer, the color filter layer comprising: A first color filter layer is configured to face the first wavelength conversion layer and to transmit light having the first wavelength band. as well as A second color filter layer is configured to face the second wavelength conversion layer and to transmit light having the second wavelength band.

30. A device transfer substrate for accommodating a light-emitting device, the device transfer substrate comprising: A plurality of grooves, each of the plurality of grooves including a first end having a first width, a second end having a second width, and an intermediate portion between the first end and the second end, the intermediate portion having an intermediate width. Wherein, the intermediate width is smaller than the first width, and the intermediate width is smaller than the second width. Wherein, the first end has the shape of a first graphic and the second end has the shape of a second graphic, and The first and second patterns partially overlap to form the middle portion, such that only one of the first and second ends accommodates the light-emitting device.

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