Display device

Abstract

A display device is provided. The display device includes: a first display layer disposed on a surface of a display substrate and including a display element; a power supply that provides a power signal to the display element; and a signal controller that provides an image signal to the display element. The display element includes: a base component; pixels disposed on a surface of the base component; a drive circuit that provides pixel drive signals to the pixels; a first transceiver that receives the power signal and transmits it to the drive circuit; and a second transceiver that receives an image signal and transmits it to the drive circuit.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0175608, filed on December 26, 2019, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to a display device and a method of manufacturing the display device. Background Art

[0004] With the development of multimedia technology, display devices are becoming increasingly important. Various display devices are being developed. Recent display devices include self-luminous devices such as organic light-emitting diodes (OLEDs) and micro-light-emitting diodes (Micro-LEDs).

[0005] Display devices are becoming larger in size and have various shapes, including curved ones. Manufacturing large-scale display devices requires large-scale manufacturing equipment and complex manufacturing processes. Consequently, the manufacturing cost and time of display devices can increase significantly. Furthermore, when manufacturing display devices having various shapes (e.g., curved ones), it is technically difficult and expensive to manufacture self-luminous devices directly on the substrate of such display devices.

[0006] Therefore, it is desirable to provide a method of manufacturing a display device having various shapes and a display device manufactured by the method without causing a significant cost increase and overcoming technical difficulties.

[0007] It should be understood that this background section is intended, in part, to provide useful context for understanding the technology. However, this background section may also include ideas, concepts, or realizations that are not part of what was known or understood by those skilled in the relevant art before the corresponding effective filing date of the subject matter disclosed herein. Summary of the Invention

[0008] The embodiments will become more apparent to those skilled in the art to which the present disclosure pertains by referring to the detailed description of the present disclosure given below.

[0009] A display device according to an embodiment may include: a first display layer disposed on a surface of a display substrate and including a display element; a power supply providing a power signal to the display element; and a signal controller providing an image signal to the display element. The display element may include: a base member; pixels disposed on a surface of the base member; a drive circuit providing a pixel drive signal to the pixels; a first transceiver receiving the power signal and transmitting the power signal to the drive circuit; and a second transceiver receiving the image signal and transmitting the image signal to the drive circuit.

[0010] In an embodiment, the first transceiver may wirelessly receive and transmit a power signal, and the second transceiver may wirelessly receive and transmit an image signal.

[0011] The base member may have a spherical shape.

[0012] At least one of the first transceiver and the second transceiver may be provided on a surface of the base member.

[0013] The pixel may include: a first electrode layer disposed on the base member; an emission layer disposed on the first electrode layer; and a second electrode layer disposed on the emission layer. At least one of the first electrode layer, the emission layer, and the second electrode layer may be curved along a surface of the base member.

[0014] The emission layer may include an organic material.

[0015] The emission layer may include an inorganic material.

[0016] At least a portion of the driving circuit may be provided between the base member and the first electrode layer.

[0017] The base member may have a flat plate shape, and a surface of the base member on which the pixels may be provided may have a flat shape.

[0018] The display element may have a size ranging from about 1 μm to about 500 μm.

[0019] The driving circuit may include: a power storage circuit that stores a power signal and outputs a first voltage signal; and a voltage control circuit that generates a second voltage signal and a third voltage signal based on the first voltage signal.

[0020] The driving circuit may further include: a storage circuit that stores position information of the display element and outputs a position information signal including the position information; and a signal processing circuit that generates a pixel control signal based on the image signal, the second voltage signal, and the position information signal.

[0021] The driving circuit may further include a pixel control circuit that provides a pixel driving signal to the pixel based on the pixel control signal and the third voltage signal.

[0022] The first display layer may include a fixed layer disposed on the display element.

[0023] The display device may further include a second display layer disposed on the first display layer, wherein the second display layer may include a display element.

[0024] According to an embodiment, a method for manufacturing a display device may include: preparing a display substrate including a display area and a non-display area adjacent to the display area; dispersing display elements in a fixing material to form a mixture; and applying the mixture to a surface of the display substrate located in the display area. The method may include: forming a base member for each of the display elements; forming a pixel on the base member; forming a drive circuit that generates a pixel drive signal based on a power signal and an image signal and provides the pixel drive signal to the pixel; forming a first transceiver that provides the power signal to the drive circuit; and forming a second transceiver that provides the image signal to the drive circuit.

[0025] The method may further include: causing display elements applied on the display substrate to emit light; and obtaining position information of each of the display elements to record the position information about the corresponding display element.

[0026] The method may further include storing the location information in a memory.

[0027] The method may further include forming a power supply on another surface of the display substrate to provide a power signal to the display element; and forming a signal controller in the non-display area to provide an image signal to the display element.

[0028] The method may further include forming a bank surrounding the display area in the non-display area before applying the mixture.

[0029] The method may further include: recording position information about at least two display elements; and recording position information about other display elements by using communication between the at least two display elements.

[0030] Details of other implementations are included in the detailed description and accompanying drawings.

[0031] In the above and other embodiments, a small-sized display element can be formed that can independently perform a display function by wirelessly receiving a power signal and an image signal, and a mixture of display elements can be applied to a display substrate of a display device. Therefore, it is possible to manufacture a large-sized display device or a display device having various shapes without increasing costs.

[0032] The above and other effects are achieved and included in the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic perspective view of a display device according to an embodiment.

[0034] Figure 2 It is along Figure 1 Schematic cross-sectional view of the display device taken along line II-II'.

[0035] Figure 3 and Figure 4 is a schematic cross-sectional view of a display device according to various embodiments, and is Figure 1 The cross-sectional view corresponding to the line II-II'.

[0036] Figure 5 is a schematic perspective view of a display element according to an embodiment.

[0037] Figure 6 It is along Figure 5 Schematic cross-sectional view of the display element taken along line VI-VI'.

[0038] Figure 7 Shown Figure 6 A variation of the display elements shown in and is Figure 5 Schematic cross-sectional view corresponding to line VI-VI'.

[0039] Figure 8 is a block diagram schematically illustrating components of a display element according to an embodiment.

[0040] Figure 9 and Figure 10 is a schematic perspective view of a display element according to various embodiments.

[0041] Figures 11 to 13 is a schematic perspective view for illustrating a method of manufacturing a display device according to an embodiment. DETAILED DESCRIPTION

[0042] Embodiments of a display device and a method for manufacturing a display device will be described with reference to the accompanying drawings. However, the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art.

[0043] It should be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer, or intervening elements or layers may be present. Like reference numerals denote like elements throughout the specification. The shapes, sizes, proportions, angles, quantities, etc. disclosed in the drawings for describing the embodiments are illustrative, and thus the present invention is not limited to the embodiments shown.

[0044] Although the terms "first," "second," and the like are used to describe various components, these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, within the technical spirit of the present invention, the first component described below may be the second component. When the singular is interpreted, it may be interpreted as having a plural meaning unless explicitly described otherwise.

[0045] Each of the features of the various embodiments of the present invention can be partially or completely paired or combined with each other and can be technically interlocked and driven in a manner that is fully understood by those skilled in the art. Each embodiment can be implemented independently of each other and can also be implemented together in a mutual relationship.

[0046] Furthermore, in the specification, the phrase “in a plan view” means that a subject portion is viewed from above, and the phrase “in a sectional view” means that a cross section taken by vertically cutting the subject portion is viewed from the side.

[0047] When a layer, film, zone, substrate, or region is referred to as being “on” another layer, film, zone, substrate, or region, it may be directly on the other layer, film, zone, substrate, or region, or there may be an intervening layer, film, zone, substrate, or region between them. Conversely, when a layer, film, zone, substrate, or region is referred to as being “directly on” another layer, film, zone, substrate, or region, there may not be an intervening layer, film, zone, substrate, or region between them. In addition, when a layer, film, zone, substrate, or region is referred to as being “below” another layer, film, zone, substrate, or region, it may be directly below another layer, film, zone, substrate, or region, or there may be an intervening layer, film, zone, substrate, or region between them. Conversely, when a layer, film, zone, substrate, or region is referred to as being “directly below” another layer, film, zone, substrate, or region, there may not be an intervening layer, film, zone, substrate, or region between them. Furthermore, "above" or "over" may include positioning above or below an object and does not necessarily imply a direction based on gravity.

[0048] For ease of description, spatially relative terms such as "below," "beneath," "lower," "above," "upper," etc. may be used herein to describe the relationship of one element or component to another element or component as shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, where the device shown in the figures is flipped, a device positioned "below" or "below" another device may be placed "above" the other device. Thus, the exemplary term "below" may include both a lower position and an upper position. The device may also be oriented in other directions, and therefore, the spatially relative terms may be interpreted differently depending on the orientation.

[0049] Throughout this specification, when an element is referred to as being “connected” to another element, the element may be “directly connected” to the other element, or “electrically connected” to the other element with one or more intervening elements interposed therebetween. In addition, when an element is referred to as being “in contact” or “contacted” with another element, the element may be “electrically in contact” or “physically in contact” with the other element; or “indirectly in contact” or “directly in contact” with the other element. It should also be understood that when the terms “comprises,” “comprising,” “includes,” and / or “including,” when used in this specification, they or it may specify the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of other features, wholes, steps, operations, elements, components, and / or any combination thereof.

[0050] It should be understood that although the terms "first", "second", "third" and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another, or to facilitate the description and explanation of elements. For example, when discussing the "first element" in the specification, it may be referred to as the "second element" or the "third element", and without departing from the teachings herein, the "second element" and the "third element" may be named in a similar manner. For example, the first color filter may be any one of a red color filter, a green color filter, and a blue color filter. The second color filter may be any one of a red color filter, a green color filter, and a blue color filter. The third color filter may be any one of a red color filter, a green color filter, and a blue color filter. The first and second light blocking members may be used interchangeably in the specification.

[0051] As used herein, "about" or "approximately" includes the stated value and the mean within an acceptable deviation range of the particular value as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0052] Hereinafter, with reference to the accompanying drawings, embodiments will be described in more detail. The same or similar reference numerals may be used for the same constituent elements in the drawings.

[0053] Figure 1 is a schematic perspective view of a display device according to an embodiment. Figure 2 It is along Figure 1 Schematic cross-sectional view of the display device taken along line II-II'. Figure 3 and Figure 4 is a schematic cross-sectional view of a display device according to various embodiments, and is Figure 1 Schematic cross-sectional view corresponding to line II-II'.

[0054] Reference Figures 1 to 4 The display device 1000 may include a display substrate 100, a display layer DPL including a plurality of display elements 200, and a signal controller 300. The display device 1000 may further include a power supply 400 disposed under (or below) the display substrate 100.

[0055] The display substrate 100 may have, for example, a polygonal column shape. The planar shape of the display substrate 100 may be a rectangular shape, but is not limited thereto. In an embodiment, the display substrate 100 may include an upper surface 100a, a lower surface 100b, and four side surfaces having, for example, a rectangular planar shape. However, the shape of the display substrate 100 is not limited to that described above. For example, the display substrate 100 may be formed into a square, a circle, an ellipse, or other shapes in a plan view. The upper surface 100a or the lower surface 100b of the display substrate 100 may include a curved surface. Therefore, the display substrate 100 may be a curved display substrate. The size of the display substrate 100 is not limited. For example, at least one of the side surfaces of the display substrate 100 may have a length greater than about 3 meters.

[0056] The display substrate 100 can be a rigid substrate or a flexible substrate, and the material or physical properties of the display substrate 100 are not particularly limited. For example, the display substrate 100 can be a rigid substrate made of glass or tempered glass, or a flexible substrate made of a thin film of plastic or metal. The display substrate 100 can be a transparent substrate, but is not limited thereto. For example, the display substrate 100 can be a translucent substrate, an opaque substrate, or a reflective substrate.

[0057] The display substrate 100 may include a display area DA in which an image is displayed and a non-display area NDA other than the display area DA. The display area DA may be a region on which the display layer DPL is disposed. The non-display area NDA may be a region on which the signal controller 300 that provides an image signal to the display layer DPL is disposed.

[0058] The display area DA may have various shapes. For example, the display area DA may be formed in various shapes, such as a closed polygon including straight lines, a circle including curved lines, an ellipse, or a semicircle including straight and curved lines, a semiellipse, or the like.

[0059] In the case where the display area DA includes multiple areas, each area can also be formed into various shapes, such as a closed polygon including straight lines, a circle, an ellipse, etc. including curved lines, or a semicircle, a semiellipse, etc. including straight and curved lines.

[0060] The sizes of the areas may be the same as or different from each other.As an example, a display device including a display area DA having a quadrilateral shape having straight sides will be described.

[0061] The non-display area NDA may be disposed at one side of the display area DA or adjacent to the display area DA. In an embodiment, the non-display area NDA may surround the display area DA.

[0062] The display layer DPL may be provided in the display area DA on the display substrate 100. The display layer DPL may include a plurality of display elements 200 and a fixing layer 500 for fixing the display elements 200.

[0063] The display element 200 can receive an image signal and a power signal from the signal controller 300 and the power supply 400, and can display an image corresponding to the provided signal. Each of the display elements 200 can emit light having various colors (such as red, green, and / or blue). However, the color of the light is not particularly limited.

[0064] The display element 200 may further include components such as a transceiver (e.g., an antenna) that can receive and transmit image signals and power signals from the signal controller 300 and the power supply 400. The transceiver can receive and transmit signals in a wired or wireless manner. The display element 200 may further include a signal processing circuit for processing the provided image signal and a power control circuit for storing and controlling the provided power signal.

[0065] The display elements 200 may be distributed in the fixed layer 500 and may be disposed at different positions. The intervals between the display elements 200 may be different from each other, but are not limited thereto, and the intervals between the display elements 200 may be the same.

[0066] The fixing layer 500 may be a medium in which the display element 200 is dispersed, and may be formed of various resin compositions that may be referred to as adhesives. However, the fixing layer 500 is not limited thereto, and in the present disclosure, any medium capable of dispersing the display element 200 may be referred to as the fixing layer 500, regardless of its name, additional function, and material.

[0067] The fixing layer 500 may be formed thicker than the thickness of the display elements 200 to fill the space between the display elements 200 and may be provided to be substantially flat. An upper surface of the fixing layer 500 may be substantially flat.

[0068] The display elements 200 dispersed in the fixing layer 500 can be arranged at different positions. For example, the display element 2001 can be arranged in the fixing layer 500 so as not to contact the upper surface 100a of the display substrate 100. As another example, the display element 2002 can be arranged in the fixing layer 500 so as to contact the upper surface 100a of the display substrate 100.

[0069] The shape of the fixed layer 500 is not limited to the above description. In another embodiment, Figure 3 As shown in FIG, the display device 1000a may include a fixed layer 500a provided on the surface of the display device 1000a with a substantially uniform thickness. For example, the fixed layer 500 may be provided on the surface of both the display substrate 100 and the display element 200 provided on the display substrate 100. The display element 200 may be in contact with the display substrate 100, but is not limited thereto.

[0070] like Figure 2 and Figure 3 As shown in FIG, the display layer DPL may be formed of a single layer provided on the display substrate 100, but is not limited thereto. In another embodiment, as shown in FIG. Figure 4 As shown in FIG, a display device 1000b may include a plurality of display layers DPL1 and DPL2. Specifically, the display device 1000b may include a first display layer DPL1 disposed on a display substrate 100 and a second display layer DPL2 disposed on the first display layer DPL1. Each of the first display layer DPL1 and the second display layer DPL2 may include a fixed layer 500 and display elements 200 distributed in the fixed layer 500.

[0071] The display elements 2003 and 2004 of the first display layer DPL1 and the display elements 2005 and 2006 of the second display layer DPL2 may be arranged differently. Some of the display elements 2003 and 2004 of the first display layer DPL1 and the display elements 2005 and 2006 of the second display layer DPL2 may overlap with each other in the third direction DR3. For example, the display element 2004 of the first display layer DPL1 may overlap with the display element 2006 of the second display layer DPL2 in the third direction DR3. Furthermore, the first direction DR1 and the second direction DR2 are directions perpendicular to the third direction DR3.

[0072] Figure 4 The display device 1000b is shown as including two display layers DPL1 and DPL2. However, the display device 1000b may include three or more display layers. In some embodiments, when the display device 1000b includes multiple display layers, the display device 1000b may be used as a stereoscopic image display device that displays a stereoscopic image.

[0073] Reference Figure 1 , the signal controller 300 may be provided in the non-display area NDA on the display substrate 100. The signal controller 300 may provide an image signal to the display element 200 and may control the operation of the display element 200.

[0074] The signal controller 300 and the display element 200 may be provided separately from each other. For example, the signal controller 300 and the display element 200 may not be electrically connected to each other, and the signal controller 300 may provide an image signal to the display element 200 via wireless communication. Therefore, the signal controller 300 may include a signal generating / transmitting element for wireless communication, and each of the display elements 200 may include a signal receiving element such as a transceiver or an antenna to receive the provided signal. Communication is not limited to wireless communication, but may be performed in a wired manner.

[0075] The signal controller 300 may provide the image signal to the display element 200 through various communication methods such as infrared communication, radio frequency communication, etc., but is not limited thereto.

[0076] The signal controller 300 may be disposed adjacent to one side of the display substrate 100. However, the arrangement of the signal controller 300 is not limited thereto. For example, the signal controller 300 may be disposed in the display area DA together with the display element 200, or may be disposed on a separate member disposed outside the display substrate 100.

[0077] The power supply 400 may be provided under the display substrate 100 to provide a power signal to the display element 200. The power supply 400 may be provided in the display area DA of the display substrate 100, or may be provided in both the display area DA and the non-display area NDA. However, the location of the power supply 400 is not limited thereto, and the power supply 400 may be provided only in the non-display area NDA, or may be provided outside the display substrate 100.

[0078] The power supply 400 may be provided separately from the display element 200. The power supply 400 may transmit power (wirelessly or through wiring) to the display element 200. Therefore, the power supply 400 may include a power transmission element for transmitting power (wirelessly or through wiring), and each of the display elements 200 may include a power receiving element such as a transceiver or an antenna to receive the provided power.

[0079] The power supply 400 may transmit power to the display element 200 using an electromagnetic induction method or a magnetic resonance method, but is not limited thereto.

[0080] Figure 5 is a schematic perspective view of a display element according to an embodiment. Figure 6 It is along Figure 5 Schematic cross-sectional view of the display element taken along line VI-VI'. Figure 7 Shown Figure 6 A variation of the display elements shown in and is Figure 5 A cross-sectional view corresponding to line VI-VI'.

[0081] Reference Figures 5 to 7 The display element 200 may include a base member 210 , a first transceiver 220 , a second transceiver 230 , a driving circuit 240 , a pixel 250 , and an encapsulation layer 260 .

[0082] The base member 210 can provide space for various components of the display element 200 to be arranged. The base member 210 can be made of a conductive substrate or an insulating substrate. For example, the base member 210 can be a substrate including various materials, such as a silicon substrate, a sapphire substrate, a glass substrate, a silicon carbide substrate, and a conductive substrate or a semiconductor substrate made of a conductive material.

[0083] The shape of the base member 210 is not particularly limited. Figure 5 As shown in , the base member 210 may have a spherical shape. Figures 5 to 7 The base member 210 and the display element 200 including the base member 210 are shown to be formed in a spherical shape or a cylindrical shape, and will be referred to later. Figure 9 and Figure 10 The shapes of a base member 210 and a display element 200 according to another embodiment are described.

[0084] In the case where the base member 210 is formed in a spherical shape, the base member 210 may be formed by freely dropping a molten base material (eg, silicon).

[0085] The first transceiver 220 may be provided in one area of the base member 210. The first transceiver 220 may be configured with a conductive pattern including a conductive material, and may be powered from a power source 400 (see FIG. Figure 2 ) receives the power signal. For example, the first transceiver 220 may be a power receiving element.

[0086] Figure 5 A structure is shown in which the first transceiver 220 spirally surrounds the curved surface of the base member 210. For example, the first transceiver 220 may be a spiral antenna, but is not limited thereto. The first transceiver 220 may be configured with various power receiving elements, such as a loop antenna.

[0087] The second transceiver 230 may be provided in an area of the base member 210 that does not overlap with the first transceiver 220. The second transceiver 230 may be configured with a conductive pattern including a conductive material and may be received from the signal controller 300 (see FIG. Figure 1 ) receives the image signal. For example, the second transceiver 230 may be a signal receiving element. The second transceiver 230 may be configured with an antenna of various shapes like the first transceiver 220.

[0088] The driving circuit 240 may be provided on the base member 210. The driving circuit 240 may receive a power signal and an image signal, and may generate a pixel driving signal for driving the pixel 250 based on the power signal and the image signal. For example, the driving circuit 240 may receive a power signal from the first transceiver 220 and may receive an image signal from the second transceiver 230.

[0089] The driving circuit 240 may include various circuit elements for signal processing, signal generation, etc., and the circuit elements may be implemented as an integrated circuit (IC) and provided on the base member 210. Figure 8 Various components included in the driving circuit 240 are described.

[0090] The driving circuit 240 may be partially formed on the surface of the base member 210 , but is not limited thereto. The driving circuit 240 may be completely formed on the surface of the base member 210 in a region that does not overlap with the first transceiver 220 , the second transceiver 230 , and the pixel 250 .

[0091] The pixel 250 may be provided on the base member 210. The pixel 250 may emit light of various colors in response to a pixel driving signal provided from the driving circuit 240. The pixel 250 may include a first pixel 251, a second pixel 252, and a third pixel 253.

[0092] The first pixel 251, the second pixel 252, and the third pixel 253 may be pixels that emit light of different colors. For example, the first pixel 251 may emit light of a first color, the second pixel 252 may emit light of a second color different from the first color, and the third pixel 253 may emit light of a third color different from the first and second colors.

[0093] According to an embodiment, the first pixel 251 may be a red pixel R that emits red light, the second pixel 252 may be a green pixel G that emits green light, and the third pixel 253 may be a blue pixel B that emits blue light. The color of light emitted by each of the pixels 251, 252, and 253 is not limited thereto, and in another embodiment, each of the pixels 251, 252, and 253 may emit light of one color among cyan, magenta, yellow, and white. Thus, the pixel 250 can display light of various colors by combining the different colors of light emitted from each of the pixels 251, 252, and 253.

[0094] Since the cross-sectional structure of each of the pixels 251 , 252 , and 253 is substantially identical or similar, the structure of the first pixel 251 will be described below, and descriptions of the structures of the second pixel 252 and the third pixel 253 will be briefly given or omitted.

[0095] like Figure 6 As shown in , the first pixel 251 may include a first electrode layer 2511 , an emission layer 2512 , and a second electrode layer 2513 sequentially stacked between the base member 210 and the encapsulation layer 260 .

[0096] The first electrode layer 2511 may be formed on the surface of the base member 210 with a substantially uniform thickness. The first electrode layer 2511 may include a conductive material such as a metal. For example, the first electrode layer 2511 may be a metal layer including a metal such as Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, and / or Cr. As another example, the first electrode layer 2511 may also include a metal oxide layer and may have a two-layer structure of ITO / Ag, Ag / ITO, ITO / Mg, ITO / MgF, or a multilayer structure such as ITO / Al / ITO. However, the material of the first electrode layer 2511 is not limited to the materials described above, as long as it is a material that can transmit the provided electrical signal.

[0097] The emission layer 2512 may be provided on the first electrode layer 2511. The emission layer 2512 may emit light having a color by including an organic emission layer including an organic material or an inorganic emission layer including an inorganic material.

[0098] For example, when the emission layer 2512 may include an organic emission layer, the emission layer 2512 may include a hole transport layer, an organic material layer, and an electron transport layer.

[0099] As another example, in the case where the emission layer 2512 includes an inorganic emission layer, the emission layer 2512 may include a first semiconductor layer doped with a p-type dopant (such as Mg, Zn, Ca, Sr and / or Ba), a second semiconductor layer doped with an n-type dopant (such as Si, Ge and / or Sn), and an active layer (e.g., a quantum well layer) disposed between the first semiconductor layer and the second semiconductor layer.

[0100] The second electrode layer 2513 may be provided on the emissive layer 2512. The second electrode layer 2513 may include a conductive material layer having a low work function, such as Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF, Ba, or a compound or mixture thereof (e.g., a mixture of Ag and Mg, etc.). The second electrode layer 2513 may also include a transparent metal oxide layer provided on the conductive material layer having a low work function.

[0101] The first electrode layer 2511 , the emission layer 2512 , and the second electrode layer 2513 may be provided to be curved according to the curvature of the surface of the base member 210 .

[0102] The first electrode layer 2511 may be directly formed on the base member 210, but other components may be provided between the first electrode layer 2511 and the base member 210. For example, Figure 7 As shown in , at least some of the driving circuit layer 240a may be further provided between the first electrode layer 2511 of the display element 200a and the base member 210. For example, the driving circuit layer 240a may be formed on the base member 210, the first encapsulation layer 261 may be formed on the driving circuit layer 240a, and the first pixel 251 may be formed on the first encapsulation layer 261. In an embodiment, when the driving circuit layer 240a and the pixel 250 are formed of a multi-layer structure, space for forming the pixel 250 can be ensured. Therefore, the display brightness of the display element 200 can be improved.

[0103] The encapsulation layer 260 may be provided at the outermost portion of the display element 200 to protect the components provided on the base member 210. The encapsulation layer 260 may include an inorganic material such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, aluminum nitride, titanium oxide, or titanium nitride, or an organic material such as polyimide, polyester, and acryl, and may be formed by stacking a plurality of layers of the above materials.

[0104] As described above, when the display element 200 is formed in a spherical shape, the display element 200 may be formed in a small size with a diameter W200 (or size) of about 1 μm to about 500 μm. For example, the diameter W200 of the display element 200 may be about 100 μm or less.

[0105] Figure 8 is a block diagram schematically illustrating components of a display element according to an embodiment. Figure 8 The various components included in the driver circuit 240 are shown.

[0106] Reference Figure 1 、 Figure 5 and Figure 8 , the display element 200 may include a first transceiver 220 , a second transceiver 230 , a driving circuit 240 , and pixels 250 provided on a base member 210 .

[0107] The first transceiver 220 can be powered by a power supply 400 (see Figure 2 ) receives the power signal SG1. As described above, the first transceiver 220 may receive the power signal SG1 from the power supply 400 through various methods such as an electromagnetic induction method or a magnetic resonance method.

[0108] The first transceiver 220 may transmit the power signal SG1 provided from the power source 400 to the driving circuit 240 .

[0109] Specifically, the first transceiver 220 may provide the power signal S1 to the power storage circuit 241 of the driving circuit 240 .

[0110] The power storage circuit 241 can receive the power signal S1 from the first transceiver 220 and store the power signal S1 therein. For example, the power storage circuit 241, which includes a capacitor, can store the power signal S1 for a short or long period of time. If necessary, the power storage circuit 241 can provide the stored power (or power) to the voltage control circuit 242 as a first voltage signal VS1.

[0111] The voltage control circuit 242 can generate a second voltage signal VS2 and a third voltage signal VS3 based on the first voltage signal VS1 provided by the power storage circuit 241. The voltage control circuit 242, which includes a voltage divider element, can divide the provided first voltage signal VS1 into voltages of various amplitudes and provide the divided voltages to other components. Therefore, the voltage control circuit 242 can generate a second voltage signal VS2 and provide the second voltage signal VS2 to the signal processing circuit 243, and the voltage control circuit 242 can generate a third voltage signal VS3 and provide the third voltage signal VS3 to the pixel control circuit 245.

[0112] The second transceiver 230 may transmit the image signal SG2 provided from the signal controller 300 to the driving circuit 240. Specifically, the second transceiver 230 may provide the image signal S2 to the signal processing circuit 243 of the driving circuit 240. The image signal S2 provided to the signal processing circuit 243 may be a signal including information on the luminous color, luminous intensity, luminous time, etc. of the display element 200.

[0113] like Figure 5 As shown in , the shape of the first transceiver 220 and the second transceiver 230 described above can be a coil shape provided on each area of the base member 210, but is not limited thereto, as long as the first transceiver 220 and the second transceiver 230 can receive the power signal SG1 or the image signal SG2. For example, the first transceiver 220 and the second transceiver 230 can be one of various known antennas. In an embodiment, the first transceiver 220 and / or the second transceiver 230 can include a dipole antenna. When the first transceiver 220 or the second transceiver 230 includes a dipole antenna, it can be advantageous for miniaturizing the display element 200. The display element 200 can effectively receive short wavelength signals through the first transceiver 220 and / or the second transceiver 230.

[0114] The position information of the corresponding display element 200 on the display substrate 100 can be recorded in the storage circuit 244. During the manufacturing process of the display device, after the display element 200 is provided on the display substrate 100, the position information can be obtained by the light emission of the display element 200 provided on the display substrate 100. For example, the position information can be distance information from each side of the display substrate 100. The obtained position information can be recorded in the storage circuit 244 of each display element 200 corresponding to the position information.

[0115] The process of recording the position information in the storage circuit 244 may be performed wirelessly through the second transceiver 230 and the signal processing circuit 243. In the case of driving the display device, the storage circuit 244 may provide the pre-stored position information as the position information signal PIS to the signal processing circuit 243.

[0116] The signal processing circuit 243 may generate a pixel control signal PCS based on the image signal S2 provided from the second transceiver 230, the second voltage signal VS2 provided from the voltage control circuit 242, and the position information signal PIS provided from the storage circuit 244. The pixel control signal PCS may include information about the light emission brightness, light emission color, light emission time, etc. of the corresponding display element 200.

[0117] The signal processing circuit 243 can specify an image signal corresponding to the display element 200 by comparing the position information about the display element 200 included in the provided image signal S2 with the position information of the corresponding display element 200 pre-stored in the storage circuit 244. The image signal S2 provided from the second transceiver 230 may include image signals for a plurality of display elements 200 provided on the display substrate 100, and the signal processing circuit 243 can generate the pixel control signal PCS by specifying only the image signal required for the corresponding display element 200 in the image signal.

[0118] The pixel control circuit 245 may generate a pixel driving signal PDS based on the pixel control signal PCS and the third voltage signal VS3 provided from the signal processing circuit 243. The pixel driving signal PDS may be a driving current or a driving voltage for substantially driving the pixel 250. The pixel 250 may emit light having a light emission brightness, a light emission color, and a light emission time corresponding to the pixel driving signal PDS.

[0119] Figure 9 and Figure 10 is a schematic perspective view of a display element according to various embodiments.

[0120] Figure 9 and Figure 10 The embodiment shown in FIG is different from the above embodiment. For example, the substrate of the display element 200_1 has a flat plate shape. For elements and configurations that are substantially the same or similar to those of the above embodiment, detailed description will be omitted only for the purpose of avoiding redundant description.

[0121] Reference Figure 9 The display element 200_1 may include a base member 210_1 and a first transceiver 220 , a second transceiver 230 , a driving circuit 240 , and pixels 250 disposed on the base member 210_1 .

[0122] The base member 210_1 may have a flat plate shape including an upper surface 210a and a lower surface 210b substantially parallel to the upper surface 210a. Figure 9 In the embodiment, the base member 210_1 has a quadrilateral structure in a plan view, but is not limited thereto. In another embodiment, the base member 210_1 may be circular in a plan view. In this case, the base member 210_1 may have a disc shape.

[0123] Various components of the display element 200_1, including the pixels 250, may be disposed on the upper surface 210a of the base member 210_1. In an embodiment, the pixels 250 may be disposed on both the upper surface 210a and the lower surface 210b of the base member 210_1. At least one of the first transceiver 220, the second transceiver 230, and the driver circuit 240 of the display element 200_1 may be disposed on the lower surface 210b of the base member 210_1. The components disposed on the upper surface 210a and the lower surface 210b of the base member 210_1 may be electrically connected to each other via connectors that pass through the base member 210_1. However, the configuration and connection of the components are not limited thereto.

[0124] As reference Figure 7 As described, at least a portion of the driving circuit 240 may be disposed below the pixel 250. In this case, since a space for forming the pixel 250 is wider, the display brightness of the display element 200 may be improved.

[0125] The first transceiver 220 and the second transceiver 230 provided on the base member 210_1 can be provided in the form of coils in areas that do not overlap with each other. The shapes of the first transceiver 220 and the second transceiver 230 are not limited thereto and can have more variations. For example, the first transceiver 220 and / or the second transceiver 230 can include a dipole antenna. When the first transceiver 220 and / or the second transceiver 230 are implemented as dipole antennas, the display element 200 or 200_1 can be advantageously miniaturized. The display element 200 or 200_1 can effectively receive short wavelength signals through the first transceiver 220 and / or the second transceiver 230.

[0126] exist Figure 10 In the embodiment shown in FIG, the display element 200_2 includes a first transceiver 220_2 having a coil form wound to surround a boundary of a base member 210_2.

[0127] As described above, when the display element 200_1 or 200_2 is formed in a plate shape, the display element 200_1 or 200_2 may be formed to have a small size with a width W200_1 (or size) ranging from about 1 μm to about 500 μm. For example, the width W200_1 of the display element 200_1 may be about 100 μm or less.

[0128] Figures 11 to 13 is a schematic perspective view for illustrating a method of manufacturing a display device according to an embodiment. Figures 11 to 13 The method of manufacturing a display device shown in Figure 1 and Figure 2 The method of the display device shown in Figures 11 to 13 The display device shown in FIG. 1 may include a display device according to Figure 5 A display element of an embodiment.

[0129] Will be together Figure 1 and Figure 2 refer to Figures 11 to 13 A method of manufacturing a display device according to an embodiment is described.

[0130] like Figure 11 As shown in FIG, a display substrate 100 including a display area DA and a non-display area NDA adjacent to or surrounding the display area DA may be prepared. The display area DA may be an area for displaying an image, and the non-display area NDA may be an area other than the display area DA.

[0131] The shape of the display substrate 100 is not limited to the shape shown in the drawings. Figures 11 to 13 The display substrate 100 is shown as having a flat plate structure (e.g., a rectangular parallelepiped shape) that is rectangular in plan view, but the display substrate 100 may have various shapes in plan view, for example, polygons such as triangles and pentagons, circles, ellipses, etc. In addition, the shape of the side surface of the display substrate 100 is not limited to the shape shown in the drawings. For example, the display substrate 100 may be a curved display substrate having curved upper and lower surfaces. The size of the display substrate 100 is not limited. For example, the display substrate 100 may be a large display substrate having a length of about 3 meters or more on at least one side.

[0132] Reference Figure 12 , the plurality of display elements 200 may be dispersed in the fixing material 500 b to form a mixture MX, and the mixture MX may be applied on the surface of the display substrate 100 located in the display area DA.

[0133] The display elements 200 may be uniformly dispersed in the fixing material 500b, and the concentration of the display elements 200 in the mixture MX may be uniform. The concentration of the mixture MX may vary depending on the number of display elements 200 dispersed in the fixing material 500b. The number of display elements 200 disposed on the display substrate 100 may be controlled by varying or controlling the concentration of the mixture MX.

[0134] As described above, since each of the display elements 200 includes the encapsulation layer 260 (see FIG. Figure 5 ), so when the display element 200 is dispersed in the fixing material 500b, other components of the display element 200 can be protected by the encapsulation layer 260.

[0135] According to an embodiment, before the mixture MX is applied onto the display substrate 100 , a bank BNK adjacent to or surrounding the display area DA may be further formed in the non-display area NDA.

[0136] The bank BNK may define the area where the mixture MX is applied so that the mixture MX can be stably applied in the display area DA of the display substrate 100. The bank BNK may be formed in a mountain shape (or include a mountain) on the display substrate 100 to prevent the mixture MX from overflowing outside the display area DA. The bank BNK may be formed before the mixture MX is applied and may be removed after the mixture MX is applied. However, in some embodiments, the bank BNK may not be removed even after the mixture MX is applied.

[0137] Reference Figure 13 The display element 200 may be provided on the display substrate 100, and a power supply 400 for supplying a power signal to the display element 200 may be formed (see Figure 2 ) and a signal controller 300 that provides an image signal.

[0138] Power supply 400 (see Figure 2 ) may be provided on a surface of the display substrate 100 opposite to a surface on which the display element 200 is provided. The power supply 400 may transmit power to the display element 200 (e.g., wirelessly). The signal controller 300 may be provided in a non-display area NDA of the display substrate 100. The signal controller 300 may transmit an image signal to the display element 200 (e.g., wirelessly). The positions of the power supply 400 and the signal controller 300 are not limited to the above.

[0139] Each of the applied display elements 200 may emit light, and position information of each of the display elements 200 may be recorded in each of the display elements 200. Such light emission and recording of position information may occur or be performed when power and / or image signals are transmitted to the display elements 200. Figure 8 As described, each of the display elements 200 may include a storage circuit 244 (see Figure 8 ), and the position information of each of the display elements 200 can be recorded in the storage circuit 244.

[0140] Specifically, during the manufacturing process, each of the display elements 200 may be provided with identification information. After the display elements 200 are applied on the display substrate 100, the signal controller 300 may provide an emission signal to the display elements 200 according to predetermined identification information.

[0141] For example, when first identification information is given to a first display element and second identification information is given to a second display element, the first display element may emit light in response to a first emission signal based on the first identification information provided by the signal controller 300, and the second display element may not emit light. Based on the light emission of the first display element, first position information of the first display element can be obtained, and the signal controller 300 can provide a signal including the first position information to the first display element. Therefore, the first position information can be recorded in the storage circuit of the first display element. Thereafter, the signal controller 300 can provide a second emission signal based on the second identification information, and the above process can be repeated.

[0142] Therefore, position information of all the display elements 200 provided on the display substrate 100 can be recorded, and when the display device 1000 is driven, the display elements 200 can emit light to display an image by using the recorded position information.

[0143] The method of recording position information on the display element 200 is not limited to this and can be implemented in various other methods. In other embodiments, the display device 1000 can use communication between the display elements 200 applied to the display substrate 100 to record the position information of each display element 200. For example, the positions of some (or at least two) of the display elements 200 applied to the display substrate 100 can be recorded, and the positions of other display elements 200 can be recorded based on the recorded display elements 200 by using communication between some (or at least two) of the display elements 200.

[0144] For example, the position of each display element can be recorded in the first to third display elements, and the first to third display elements can be randomly selected display elements in the display elements 200 applied on the display substrate 100. The fourth display element whose position information is not recorded can receive position information from the first to third display elements. The fourth display element can calculate the position information of the fourth display element based on the position information of the first to third display elements, and store the position information of the fourth display element in its storage circuit. Other display elements whose position information is not recorded can also repeat the above operations to receive position information from other display elements and record their own position information in their storage circuits. In this article, the fourth display element can be a display element adjacent to the first to third display elements, and the communication between the display elements 200 can be phonon communication using phonons, but is not limited to this.

[0145] According to an embodiment of a display device and a method for manufacturing the same, a small-sized display element can be configured to perform a display function alone or by itself by sending / receiving a power signal and an image signal (e.g., wirelessly). The display device can be manufactured by applying a mixture mixed with the display element to a display substrate. One of the advantages is that large-sized display devices can be manufactured easily or more efficiently without limiting the display substrate that would otherwise be a difficulty in manufacturing large-sized display devices. In addition, in the case where the display substrate has a complex shape (e.g., a curved shape), the display device can be easily or more efficiently manufactured by applying a mixture including the display element. Therefore, the manufacture of display devices of relatively large size and / or having various shapes can be achieved without causing a significant increase in cost or an increase in economic cost.

[0146] Although the embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that the present invention may be implemented in other specific forms without changing the technical concept or basic features. Therefore, the above embodiments should be considered only in an illustrative sense and not for the purpose of limitation.

Claims

1. Display devices, including: a first display layer disposed on a surface of the display substrate and comprising a display element; a power supply, providing a power signal to the display element; as well as a signal controller for providing an image signal to the display element; Wherein, the display element includes: Basic components; Pixels are provided on the surface of the base member; a driving circuit for providing a pixel driving signal to the pixel; a first transceiver, receiving the power signal and sending the power signal to the driving circuit; and a second transceiver, receiving the image signal and sending the image signal to the driving circuit; Wherein, the driving circuit includes: a power storage circuit that stores the power signal and outputs a first voltage signal; and The voltage control circuit generates a second voltage signal and a third voltage signal based on the first voltage signal.

2. The display device according to claim 1, wherein The first transceiver wirelessly receives and transmits the power signal, and The second transceiver wirelessly receives and transmits the image signal.

3. The display device according to claim 1, wherein The base member has a spherical shape.

4. The display device according to claim 3, wherein At least one of the first transceiver and the second transceiver is disposed on the surface of the base member.

5. The display device according to claim 3, wherein The pixels include: A first electrode layer is provided on the base member, an emission layer, disposed on the first electrode layer, and a second electrode layer, disposed on the emission layer; At least one of the first electrode layer, the emission layer, and the second electrode layer is bent along the surface of the base member. The display device according to claim 5 , wherein: At least a portion of the driving circuit is provided between the base member and the first electrode layer.

7. The display device according to claim 1, wherein The driving circuit further includes: a storage circuit that stores position information of the display element and outputs a position information signal including the position information; and The signal processing circuit generates a pixel control signal based on the image signal, the second voltage signal, and the position information signal.

8. The display device according to claim 7, wherein The driving circuit further includes: The pixel control circuit provides the pixel driving signal to the pixel based on the pixel control signal and the third voltage signal.

9. The display device according to claim 1, wherein The first display layer includes a fixed layer disposed on the display element.

Images