Display device for displaying a three-dimensional image

Abstract

A display device for displaying a three-dimensional image according to one exemplary embodiment of the present disclosure includes a support plate, a base layer disposed above the support plate, a display panel disposed above the base layer and divided into a plurality of sub-pixels each including a display element, and a lens disposed above the display panel, wherein the display element is disposed along a focal plane of the lens and can achieve a wider field of view (FoV) than a conventional display element without optical loss.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2024-0200861, filed on December 30, 2024, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device for displaying three-dimensional images, and more particularly, to a display device for displaying three-dimensional images including a lens. Background Technology

[0004] A three-dimensional (3D) display can be defined as "a system for artificially reproducing a 3D screen or image." Here, the system includes software technologies for generating 3D content and hardware for realizing that content in three dimensions.

[0005] A virtual 3D display (hereinafter referred to as a "3D image display device") is a system that utilizes binocular parallax caused by the fact that the horizontal distance between human eyes is about 65 mm, allowing users to virtually experience a sense of depth on flat display hardware.

[0006] In other words, due to binocular parallax, our eyes perceive slightly different images of the same object (each eye receives different spatial information). When these two images are transmitted to the brain via the retina, the brain merges them, allowing us to perceive depth. Utilizing this principle, 3D image display devices are designed to display two images simultaneously (one for the left eye and one for the right eye), thus delivering each image to the corresponding eye to create a virtual sense of depth.

[0007] For example, a three-dimensional image display device may include a lens disposed above a display panel. The lens may extend parallel in one direction. For instance, the lens may be a cylindrical lens that realizes a three-dimensional image in a light field manner.

[0008] Typically, the field of view (FoV) is determined by the lens shape and optical clearance. In a typical light field display (LFD) structure, when using lenses with large curvature to expand the FoV, the beam convergence decreases as the viewing position moves further away from the front due to lens aberrations, resulting in a degradation of 3D image quality caused by increased crosstalk. Summary of the Invention

[0009] One objective of this disclosure is to provide a display device for displaying three-dimensional images that can expand FoV while having excellent 3D image quality.

[0010] Another objective of this disclosure is to provide a display device for displaying three-dimensional images with a wide FoV for large panels of 100 inches or larger.

[0011] The purpose of this disclosure is not limited to the above-mentioned purposes, and other purposes not mentioned above will be clearly understood by those skilled in the art based on the following description.

[0012] According to an exemplary embodiment of the present disclosure, a display device for displaying a three-dimensional image includes: a support plate; a base layer disposed above the support plate; a display panel disposed above the base layer and divided into a plurality of sub-pixels, each including a display element; and a lens disposed above the display panel, wherein the display elements are disposed along the focal plane of the lens.

[0013] According to an exemplary embodiment of the present disclosure, a display device for displaying a three-dimensional image includes: a display panel disposed above a base layer and divided into a plurality of sub-pixels, each including a display element; and a lens disposed above the display panel, wherein the top surface of the base layer has an uneven profile along the curved shape of the lens, and the display elements are disposed along the uneven profile of the base layer.

[0014] Further details of the exemplary embodiments are included in the detailed description and accompanying drawings.

[0015] This disclosure achieves a wider FoV than conventional devices without optical loss by using a flexible display panel to place the display elements on the curved surface of the lens. Furthermore, it suppresses the degradation of 3D image quality by minimizing interference between screens while maintaining beam convergence. Moreover, it enables clear 3D images not only from a frontal viewpoint but also from various other angles.

[0016] The effects of this disclosure are not limited to those illustrated above, and many more different effects are included in this specification. Attached Figure Description

[0017] The above and other aspects, features and advantages of this disclosure will become more clearly understood from the following detailed description taken in conjunction with the accompanying drawings:

[0018] Figure 1 A schematic diagram illustrating a display device for displaying three-dimensional images according to an exemplary embodiment of the present disclosure;

[0019] Figure 2 A schematic cross-sectional view illustrating a display device for displaying three-dimensional images according to an exemplary embodiment of the present disclosure;

[0020] Figure 3 To show Figure 2A top view of a portion of the display panel;

[0021] Figure 4 This is a magnified top view of the stretchable display panel;

[0022] Figure 5 For along Figure 4 A cross-sectional view taken from line I-I';

[0023] Figure 6 and Figure 7 To be Figure 2 An enlarged view of part A;

[0024] Figure 8 and Figure 9 To show a graph of brightness based on viewing angle;

[0025] Figure 10 A cross-sectional view of a display device for displaying three-dimensional images according to another exemplary embodiment of the present disclosure; and

[0026] Figure 11 To show Figure 10 A top view of a portion of the display panel. Detailed Implementation

[0027] The advantages and features of this disclosure, as well as methods for achieving said advantages and features, will become clear from the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in a variety of forms. The exemplary embodiments are provided by way of example only to enable those skilled in the art to fully understand the disclosure and scope of this disclosure.

[0028] The shapes, dimensions, ratios, angles, quantities, etc., shown in the accompanying drawings to describe exemplary embodiments of this disclosure are merely examples, and this disclosure is not limited thereto. Throughout the specification, the same reference numerals generally denote the same elements. Furthermore, in the following description of this disclosure, detailed descriptions of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Unless terms such as “comprising,” “having,” and “consisting of” are used herein in conjunction with the term “only,” these terms are generally intended to allow for the addition of additional components. Unless expressly stated otherwise, any reference to the singular may include the plural.

[0029] Even if not explicitly stated, components are interpreted as including the normal error range.

[0030] When terms such as “above,” “over,” “below,” and “beside” are used to describe the positional relationship between two components, one or more components may be positioned between the two components unless the terms are used in conjunction with the terms “immediately adjacent” or “directly.”

[0031] When one element or layer is placed "on" another element or layer, the other layer or element can be directly inserted onto or between the other element.

[0032] Although the terms "first," "second," etc., are used to describe a wide variety of components, these components are not limited by these terms. These terms are only used to distinguish one component from other components. Therefore, the first component mentioned below can be a second component in the technical concept of this disclosure.

[0033] Throughout the specification, the same reference numerals generally denote the same elements.

[0034] The dimensions and thicknesses of the various components shown in the accompanying drawings are illustrated for ease of description, and this disclosure is not limited to the dimensions and thicknesses of the components shown.

[0035] Features of the various embodiments of this disclosure may be partially or completely adhered to or combined with each other and may be interlocked and operated in technically different ways, and the embodiments may be implemented independently or in connection with each other.

[0036] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic diagram illustrating a display device for displaying three-dimensional images according to an exemplary embodiment of the present disclosure.

[0038] Reference Figure 1 A display device 100 for displaying three-dimensional images, according to an exemplary embodiment of the present disclosure, may include a display panel 110.

[0039] The display panel 110 can be of various types, such as an organic light-emitting display panel or a micro light-emitting diode (μ-LED) display panel. For ease of description, a micro light-emitting diode display panel will be described below as an example.

[0040] Display panel 110 can generate images to be provided to the user.

[0041] For example, a plurality of sub-pixels SP can be arranged in a matrix within the display panel 110. Various signals can be applied to each sub-pixel SP through various signal lines GL, DL, and PL. For example, signal lines GL, DL, and PL may include a gate line GL for applying gate signals, a data line DL for applying data signals, and a power supply line PL for supplying power supply voltage.

[0042] The gate line GL can be electrically connected to the gate driver GD. Additionally, the data line DL can be electrically connected to the data driver DD.

[0043] The gate driver GD and the data driver DD can be controlled by the timing controller TC. The gate driver GD can receive clock signals, reset signals, and start signals from the timing controller TC, and the data driver DD can receive digital video data and source timing signals from the timing controller TC.

[0044] In addition, the power supply line PL can be electrically connected to the power supply unit PU.

[0045] The display panel 110 may include an active region AA in which a plurality of subpixels SP are disposed, and a non-active region NA located outside the active region AA. For example, the non-active region NA may be located outside the active region AA. For example, the active region AA may be surrounded by the non-active region NA.

[0046] The active area AA is the area in the display device 100 for displaying three-dimensional images to display images, and display elements and various driving elements for driving the display elements can be provided in the active area AA.

[0047] For example, a display element can be configured as an LED element comprising an n-type layer, an active layer, a p-type layer, an n-electrode, and a p-electrode.

[0048] In addition, a variety of driving elements, such as thin-film transistors, capacitors, and wiring, can be arranged in the active area AA.

[0049] A plurality of subpixels SP can be disposed in the active area AA. The subpixel SP is the smallest unit constituting the screen, and each of the plurality of subpixels SP can include a display element and driving circuitry. Each of the plurality of subpixels SP can emit light of different wavelengths. For example, the plurality of subpixels SP can include at least one red subpixel, a green subpixel, and a blue subpixel. Not limited to this, the plurality of subpixels SP can also include a white subpixel.

[0050] Furthermore, the driving circuit for the sub-pixel SP is a circuit used to control the driving of the display element. For example, the driving circuit may include thin-film transistors and capacitors, but is not limited to these.

[0051] The non-active region NA is the area where no image is displayed, and it can be equipped with various components for driving a plurality of sub-pixels SP disposed in the active region AA. For example, a driver IC and a flexible film can be provided for supplying signals for driving the plurality of sub-pixels SP.

[0052] like Figure 1 As shown, the non-active region NA can be the region that surrounds the active region AA. However, it is not limited to this; for example, the non-active region NA can be the region that extends from the active region AA.

[0053] The gate driver GD, data driver DD, timing controller TC, and power supply unit PU can be located outside the active region AA. For example, signal lines GL, DL, and PL can each include areas located on the non-active region NA.

[0054] At least one of the gate driver GD, data driver DD, timing controller TC, and power supply unit PU can be directly disposed on the non-active region NA.

[0055] Figure 2 A schematic cross-sectional view is provided to illustrate a display device for displaying three-dimensional images according to an exemplary embodiment of the present disclosure.

[0056] Figure 2 A portion of a cross-section of a display device for displaying three-dimensional images according to an exemplary embodiment of the present disclosure is shown schematically.

[0057] Reference Figure 2 According to an exemplary embodiment of the present disclosure, a display device 100 for displaying three-dimensional images may include a display panel 110 disposed above a support plate 101 and a lens 130 disposed above the display panel 110.

[0058] The display panel 110 may be a miniature light-emitting diode display panel, but is not limited to this.

[0059] Display panel 110 can be a stretchable display panel.

[0060] The support plate 101 can be positioned at the bottom of the display device 100 used to display three-dimensional images.

[0061] The support plate 101 can support the bottom surface of the display panel 110.

[0062] The support plate 101 protects the display panel 110 from impacts on its bottom surface. The support plate 101 ensures impact resistance, which is the ability of the display panel 110 to withstand impacts. The support plate 101 also ensures flatness, allowing the display panel 110 to remain flat when not subjected to external forces that would cause it to bend.

[0063] A base layer 105 can be provided above the support plate 101.

[0064] However, this disclosure is not limited thereto, and the base layer 105 may be omitted.

[0065] The base layer 105 may have an uneven profile on its top surface.

[0066] For example, the base layer 105 may have an uneven profile on its top surface corresponding to the curvature of the lens 130. That is, the base layer 105 may have a concave or convex shape on its top surface along the focal plane of the lens 130.

[0067] For example, the base layer 105 can be formed from organic materials.

[0068] For example, the base layer 105 can be formed by photolithography or imprinting.

[0069] A first adhesive layer may be provided between the base layer 105 and the display panel 110, but is not limited thereto, and the display panel 110 may be directly disposed above the base layer 105.

[0070] The first adhesive layer may be disposed above the base layer 105. The first adhesive layer may be disposed above the entire top surface of the base layer 105.

[0071] For example, the first adhesive layer may be made of a transparent adhesive layer such as optically clear resin (OCR) or optically clear adhesive (OCA), but is not limited thereto. The first adhesive layer attaches the base layer 105 and the display panel 110.

[0072] The display panel 110 can be positioned above the base layer 105.

[0073] The display panel 110 may include an active region having pixels for displaying images and a non-active region surrounding the active region. In one example, the display panel 110 may be a micro-light-emitting diode (μ-LED) display panel, but is not limited thereto. The display panel 110 may be a quantum dot display panel or an organic light-emitting display panel in which organic light-emitting diodes emit light through an organic light-emitting layer to display images.

[0074] The display panel 110 of this disclosure can be a flexible, stretchable display panel. The display panel 110 can be implemented using a polymer material with excellent bending capabilities, such as polyimide or a plastic film or membrane. Hereinafter, examples will be described in which the display panel 110 of this disclosure is a stretchable display panel.

[0075] Meanwhile, a stretchable display panel 110 of an exemplary embodiment of this disclosure is characterized in that various components and layers, including display elements, are arranged to conform to the uneven shape (or contour) of the top surface of the base layer 105. Specifically, the display elements and other components and layers may be arranged in concave or convex shapes according to the uneven shape formed on the top surface of the base layer 105. This is because the stretchable display panel 110 of this disclosure has flexibility through bending or stretching.

[0076] In particular, a stretchable display panel 110 according to an exemplary embodiment of the present disclosure is characterized in that the display elements are disposed along the focal plane of the lens 130.

[0077] A planarization layer 125 may be provided above the stretchable display panel 110.

[0078] The planarization layer 125 can flatten the unevenness of the top surface of the stretchable display panel 110.

[0079] For example, the planarization layer 125 can be formed from organic materials such as acrylic resins or epoxy resins, and for example, it can be formed from photo acrylic (PAC), but is not limited thereto.

[0080] A plurality of lenses 130 may be disposed above the planarization layer 125.

[0081] A second adhesive layer may be provided between the planarization layer 125 and the lens 130, but is not limited thereto, and the lens 130 may be directly disposed above the planarization layer 125.

[0082] A second adhesive layer may be disposed above the planarization layer 125. The second adhesive layer may be disposed above the entire top surface of the planarization layer 125.

[0083] For example, the second adhesive layer may be made of a transparent adhesive layer such as optically transparent resin (OCR) or optically transparent adhesive (OCA), but is not limited thereto. The second adhesive layer attaches the planarization layer 125 and the lens 130.

[0084] Figure 3 To show Figure 2 A top view of a portion of the display panel.

[0085] Figure 3A portion of a display panel 110 is shown as an example, in which a plurality of subpixels SP1, SP2 and SP3 are provided.

[0086] Figure 3 Examples shown include SP1, SP2, and SP3. Figure 1 In the case where five sub-pixels, including SP, correspond to a lens 130 in the horizontal direction, but not limited to this, two or more sub-pixels SP can correspond to a lens.

[0087] Reference Figure 3 According to an exemplary embodiment of the present disclosure, the display panel 110 may include a pixel region in which a plurality of sub-pixels SP1, SP2 and SP3 are present, and a wiring region in which various signal lines are disposed.

[0088] A plurality of first sub-pixels SP1, second sub-pixels SP2 and third sub-pixels SP3 can be set in the pixel area.

[0089] For example, the first sub-pixel SP1 can be a red sub-pixel.

[0090] For example, the second sub-pixel SP2 can be a green sub-pixel.

[0091] For example, the third sub-pixel SP3 can be a blue sub-pixel.

[0092] For example, the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 can have polygonal shapes, such as rectangular shapes, but are not limited thereto, and the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3 can have a variety of shapes, such as circular or elliptical shapes.

[0093] Figure 3 The example shows a case where a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3 together constitute a pixel, but it is not limited to this.

[0094] Subpixels SP1, SP2, and SP3 (SP) may each include an opening region OA in which the portion corresponding to the light-emitting region EA is removed (opened). The light-emitting region EA may have a shape corresponding to the shape of the opening region OA. Here, when the shape of one component corresponds to the shape of another component, it can mean that the shape of one component is the same as the shape of the other component, or that the shapes are the same but different in size, or that the shape of one component is formed by transferring the shape of another component in some way. Therefore, the shape of the light-emitting region EA can be understood as corresponding to the shape of the opening region OA, which is transferred by light emitted from a display element that is substantially located in the opening region OA.

[0095] The area between the luminescent regions EA can be defined as the non-luminescent region NEA.

[0096] The non-emitting area NEA can correspond to the area between lenses 130, and sub-pixels SP1, SP2 and SP3 (SP) may not be set there.

[0097] Lens 130 can be positioned above display panel 110.

[0098] Lens 130 may extend parallel in one direction. For example, in a display device for displaying a three-dimensional image according to an exemplary embodiment of the present disclosure, lens 130 may be positioned parallel in a first direction X and a second direction Y perpendicular to the first direction X, and each sub-pixel SP may extend in a direction inclined relative to the first direction X and the second direction Y.

[0099] Users can use lens 130 to visualize images in three dimensions produced by light emitted from display elements of individual sub-pixels SP.

[0100] Lens 130 can be a lenticular lens.

[0101] For example, a display device for displaying three-dimensional images according to an exemplary embodiment of the present disclosure may be a light field display device (LFD) that provides three-dimensional images to a user in a light field manner using a lens 130.

[0102] For example, in the first direction X, each lens 130 may overlap with a plurality of sub-pixels SP. The lens 130 may be formed by photolithography or reflow process, but is not limited thereto, and may be attached in the form of a film.

[0103] For example, the five sub-pixels SP can overlap with one of the plurality of lenses 130, but are not limited thereto. In this case, the size of one lens 130 located above the five sub-pixels SP can be larger than the total size of the five display elements disposed in the five sub-pixels SP.

[0104] Figure 4 This is a magnified top view of the stretchable display panel.

[0105] Figure 5 For along Figure 4 The cross-sectional view taken from line I-I'.

[0106] Figure 4 and Figure 5 The planar and cross-sectional structures of a stretchable display panel 110 using miniature light-emitting diodes, which is an example of a display panel of this disclosure, are shown.

[0107] Although not in Figure 5 As shown, but according to an exemplary embodiment of the present disclosure, the stretchable display panel 110 is characterized in that various components and layers, including display elements, are arranged according to a base layer ( Figure 2 The uneven shape of the top surface of 105 is set as an uneven shape.

[0108] Reference Figure 4 and Figure 5 According to an exemplary embodiment of the stretchable display panel 110 of this disclosure, a plurality of island substrates 111 may be disposed on a lower substrate 120. The plurality of island substrates 111 may be disposed on the lower substrate 120 at intervals from each other. For example, as... Figure 4 As shown, a plurality of island substrates 111 can be arranged in a matrix on the lower substrate 120, but are not limited thereto.

[0109] The lower substrate 120 may have an unevenness corresponding to the uneven shape of the top surface of the base layer 105. For example, the top surface of the lower substrate 120 may have a concave or convex unevenness depending on the uneven shape of the top surface of the base layer 105.

[0110] For example, the lower substrate 120 may have an active region and a non-active region surrounding the active region.

[0111] The active region may include a plurality of pixels P, each comprising a plurality of sub-pixels SP, and a sub-pixel SP may include a display element region DA, a first wiring region WA1, a second wiring region WA2, and a transparent region TA.

[0112] Display elements and various driving elements for driving display elements can be set in the display element area DA.

[0113] For example, the display element may be a light-emitting diode (LED) 160, but this disclosure is not limited thereto, and it may be an organic light-emitting diode including an anode, an organic light-emitting layer and a cathode, or a liquid crystal display element. LED 160 may include a micro light-emitting diode (μ-LED).

[0114] A plurality of LEDs 160 can be arranged to conform to the uneven shape of the top surface of the base layer 105. That is, the plurality of LEDs 160 can be arranged along the lens ( Figure 2 The focal plane setting is 130.

[0115] For example, the driving element may be transistor 150, but this disclosure is not limited thereto.

[0116] In this case, the first wiring area WA1 can be located on one side of the display element area DA, and can be located between display element areas DA that are adjacent to each other in the X-axis direction.

[0117] For example, a first connecting line 181 may be provided in the first wiring area WA1. The first connecting line 181 refers to the wiring in the connecting line 180 that extends in the X-axis direction.

[0118] The first connection line 181 can electrically connect two pads arranged side-by-side on two of a plurality of island substrates 111 that are adjacent to each other in the X-axis direction. The first connection line 181 can be used as a gate line or a low-potential power line, but is not limited thereto.

[0119] The first connecting line 181 can be set to follow the uneven shape of the top surface of the base layer 105.

[0120] Furthermore, the second wiring area WA2 can be located on the other side of the display element area DA, and can be located between display element areas DA that are adjacent to each other in the Y-axis direction.

[0121] For example, the second connecting line 182 can be set in the second wiring area WA2. The second connecting line 182 refers to the wiring in the connecting line 180 that extends in the Y-axis direction.

[0122] The second connection line 182 can electrically connect two pads arranged side-by-side on two of a plurality of island substrates 111 that are adjacent to each other in the Y-axis direction. The second connection line 182 can be used as a data line, a high-potential power line, or a reference voltage line, but is not limited thereto.

[0123] The second connecting line 182 can be set to follow the uneven shape of the top surface of the base layer 105.

[0124] Furthermore, the transparent area TA can be located between adjacent first wiring areas WA1 in the Y-axis direction and adjacent second wiring areas WA2 in the X-axis direction. Meanwhile, areas in the first wiring areas WA1 and the second wiring areas WA2, excluding the areas containing the first connecting line 181 and the second connecting line 182, can also be considered transparent areas because no opaque components are disposed therein.

[0125] The transparent region TA may not have opaque components, and because it is provided with a lower substrate 120 made of an elastic polymer, the transparent region TA may be translucent.

[0126] A plurality of island substrates 111 can be disposed in the display element area DA.

[0127] The top surface of the island substrate 111 may have a concave or convex shape, depending on the uneven shape of the top surface of the base layer 105, but is not limited thereto.

[0128] A buffer layer 112 may be provided above the plurality of island substrates 111. For example, the buffer layer 112 may be provided above the plurality of island substrates 111 to protect the various components of the stretchable display panel 110 from the penetration of moisture (H2O) and oxygen (O2) from the lower substrate 120 and the outside of the plurality of island substrates 111.

[0129] The buffer layer 112 can be made of an insulating material and can be, for example, a single or multiple inorganic layer such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon oxynitride (SiON). However, the buffer layer 112 may be omitted depending on the structure or characteristics of the stretchable display panel 110.

[0130] The buffer layer 112 may have unevenness corresponding to the uneven shape of the top surface of the base layer 105.

[0131] The buffer layer 112 may be disposed only in the region overlapping with the plurality of island substrates 111. Since the buffer layer 112 may be made of an inorganic material, it may be prone to cracking or other damage during stretching of the stretchable display panel 110. Therefore, the buffer layer 112 may not be disposed in the region between the plurality of island substrates 111, and may be patterned in the shape of the plurality of island substrates 111 to be disposed only above the plurality of island substrates 111. Therefore, by disposing the buffer layer 112 only in the region overlapping with the plurality of rigid island substrates 111, damage to the buffer layer 112 can be suppressed even when the stretchable display panel 110 is deformed (e.g., bent or stretched).

[0132] A gate pad 171 may be provided on the buffer layer 112, but is not limited thereto. The gate pad 171 is a pad used to transmit gate signals to a plurality of sub-pixels SP. The gate pad 171 may be made of the same material as the gate electrode 151, but is not limited thereto.

[0133] The gate pad 171 can be configured to conform to the uneven shape of the top surface of the base layer 105.

[0134] A transistor 150, including a gate electrode 151, an active layer 152, a source electrode 153, and a drain electrode 154, can be disposed above the buffer layer 112.

[0135] Transistor 150 can be arranged to conform to the uneven shape of the top surface of base layer 105.

[0136] Transistor 150 can be placed in the display element area DA.

[0137] For example, the active layer 152 may be disposed on the buffer layer 112, and the gate insulating layer 113 for insulating the active layer 152 from the gate electrode 151 may be disposed on the active layer 152.

[0138] The gate insulating layer 113 may have unevenness corresponding to the uneven shape of the top surface of the base layer 105.

[0139] A common line CL can be provided on the gate insulating layer 113.

[0140] The common line CL can be set to follow the uneven shape of the top surface of the base layer 105.

[0141] The common line CL is a wiring used to apply a common voltage to a plurality of sub-pixels SP. The common line CL may be made of the same material as the source electrode 153 and drain electrode 154 of transistor 150, but is not limited thereto.

[0142] Furthermore, an interlayer insulating layer 114 may be provided on the gate insulating layer 113 to insulate the gate electrode 151 from the source electrode 153 and the drain electrode 154. Additionally, the source electrode 153 and the drain electrode 154, which are respectively in contact with the active layer 152, may be provided on the interlayer insulating layer 114.

[0143] The interlayer insulation layer 114 may have unevenness corresponding to the uneven shape of the top surface of the base layer 105.

[0144] The gate insulating layer 113 and the interlayer insulating layer 114 can be patterned to be disposed only in the region overlapping with the plurality of island substrates 111. Since the gate insulating layer 113 and the interlayer insulating layer 114 can also be made of inorganic materials, similar to the buffer layer 112, they may be prone to cracking or other damage during the stretching of the stretchable display panel 110. Therefore, the gate insulating layer 113 and the interlayer insulating layer 114 may not be disposed in the region between the plurality of island substrates 111, and can be patterned in the shape of the plurality of island substrates 111 to be disposed only on the plurality of island substrates 111.

[0145] exist Figure 5 For ease of description, only driving transistors among the various transistors that may be included in the stretchable display panel 110 are shown, but the display device is not limited to this, and may also include switching transistors, capacitors, etc. Furthermore, although transistor 150 is described herein as having a coplanar structure, various transistors such as interleaved structures may also be used.

[0146] A reflective layer 183 may be provided on the interlayer insulating layer 114.

[0147] The reflective layer 183 can be set to follow the uneven shape of the top surface of the base layer 105.

[0148] The reflective layer 183 is a layer for reflecting light emitted from the LED 160 toward the lower substrate 120 upwards to the upper part of the stretchable display panel 110 to emit light outwards. The reflective layer 183 may be made of a metallic material with high reflectivity.

[0149] An adhesive layer 119 covering the reflective layer 183 may be provided on the reflective layer 183.

[0150] The adhesive layer 119 may have unevenness corresponding to the uneven shape of the top surface of the base layer 105.

[0151] The adhesive layer 119 is used to attach the LED 160 above the reflective layer 183 and to insulate the reflective layer 183, which is made of a metallic material, from the LED 160. For example, the adhesive layer 119 can be made of a thermosetting material or a photocurable material, but is not limited thereto. Figure 5 In the diagram, the adhesive layer 119 is shown as being configured to cover only the reflective layer 183, but the placement of the adhesive layer 119 is not limited to this.

[0152] LED 160 can be disposed above adhesive layer 119. LED 160 can be disposed overlapping with reflective layer 183.

[0153] As described above, the plurality of LEDs 160 can be arranged to follow the uneven shape of the top surface of the base layer 105. That is, the plurality of LEDs 160 can be arranged along the focal plane of the lens 130.

[0154] LED 160 can be set in the display element area DA.

[0155] LED 160 may include an n-type layer 161, an active layer 162, a p-type layer 163, an n-electrode 165, and a p-electrode 164. The following description uses an example of an LED 160 employing a lateral structure, but is not limited thereto.

[0156] For example, the n-type layer 161 of the LED 160 can be disposed on the adhesive layer 119 to overlap with the reflective layer 183. The n-type layer 161 can be formed by doping an n-type impurity into gallium nitride, which has excellent crystallinity. The active layer 162 can be disposed on the n-type layer 161. The active layer 162 is the light-emitting layer in the LED 160 and can be made of a nitride semiconductor such as indium gallium nitride. The p-type layer 163 can be disposed on the active layer 162. The p-type layer 163 can be formed by doping a p-type impurity into gallium nitride. However, the materials of the n-type layer 161, the active layer 162, and the p-type layer 163 are not limited to these.

[0157] A p-electrode 164 may be disposed on the p-type layer 163 of the LED 160. An n-electrode 165 may be disposed on the n-type layer 161 of the LED 160. The n-electrode 165 may be disposed spaced apart from the p-electrode 164. For example, the LED 160 may be manufactured by sequentially laminating the n-type layer 161, the active layer 162, and the p-type layer 163, etching predetermined portions of the active layer 162 and the p-type layer 163, and forming the n-electrode 165 and the p-electrode 164. In this case, the predetermined portions may serve as spaces for spacing the n-electrode 165 and the p-electrode 164, and may be etched such that a portion of the n-type layer 161 is exposed. That is, the surface of the LED 160 on which the p-electrode 164 and the n-electrode 165 are disposed may not be a flat surface, but may have different height levels. Therefore, the p electrode 164 can be disposed on the p-type layer 163, and the n electrode 165 can be disposed on the n-type layer 161, and the p electrode 164 and the n electrode 165 can be disposed at different heights and horizontally spaced apart from each other.

[0158] Furthermore, the n-electrode 165 can be positioned closer to the reflective layer 183 than the p-electrode 164. Both the n-electrode 165 and the p-electrode 164 can be made of a conductive material, and for example, a transparent conductive oxide. The n-electrode 165 and the p-electrode 164 can be made of the same material, but are not limited to this.

[0159] A planarization layer 115 may be disposed above the interlayer insulating layer 114 and the adhesive layer 119. The planarization layer 115 may be configured to planarize the upper surface of the planarization layer 115 in the area where the LED 160 is disposed. The planarization layer 115 may include two or more layers.

[0160] The planarization layer 115 may have unevenness corresponding to the uneven shape of the top surface of the base layer 105.

[0161] In some exemplary embodiments, an additional insulating layer may be provided between the transistor 150 and the planarization layer 115. That is, in order to protect the transistor 150 from the penetration of moisture or oxygen, an additional insulating layer may be provided covering the transistor 150. The additional insulating layer may be made of inorganic materials, may be a single layer or multiple layers, and may be a passivation layer, but this disclosure is not limited thereto.

[0162] A first electrode 166 and a second electrode 167 may be disposed above the planarization layer 115. The first electrode 166 is an electrode for electrically connecting the transistor 150 and the LED 160.

[0163] The first electrode 166 and the second electrode 167 can be arranged to conform to the uneven shape of the top surface of the base layer 105.

[0164] The first electrode 166 can be connected to the p electrode 164 of the LED 160 through contact holes formed in the planarization layer 115. Furthermore, the first electrode 166 can be connected to the drain electrode 154 of the transistor 150 through contact holes formed in the planarization layer 115 and the interlayer insulating layer 114. However, it is not limited to this; depending on the type of transistor 150, the first electrode 166 can also be connected to the source electrode 153 of the transistor 150.

[0165] The p electrode 164 of LED 160 and the drain electrode 154 of transistor 150 can be electrically connected through the first electrode 166.

[0166] Furthermore, the second electrode 167 is an electrode used to electrically connect the LED 160 and the common line CL. For example, the second electrode 167 can be connected to the common line CL through contact holes formed in the planarization layer 115 and the interlayer insulating layer 114, and can also be connected to the n electrode 165 of the LED 160 through contact holes formed in the planarization layer 115. Therefore, the common line CL and the n electrode 165 of the LED 160 can be electrically connected.

[0167] When the stretchable display panel 110 is turned on, different voltage levels can be applied to the drain electrode 154 and the common line CL of the transistor 150. The voltage applied to the drain electrode 154 of the transistor 150 can be applied to the first electrode 166, and the common voltage can be applied to the second electrode 167. Different voltage levels can be applied to the p electrode 164 and the n electrode 165 through the first electrode 166 and the second electrode 167, thus enabling the LED 160 to emit light.

[0168] exist Figure 5 The diagram shows an example where transistor 150 is electrically connected to p electrode 164 and common line CL is electrically connected to n electrode 165, but is not limited thereto, and transistor 150 can be electrically connected to n electrode 165 and common line CL can be electrically connected to p electrode 164.

[0169] Data pads 173 and connection pads 172 may be provided above the planarization layer 115.

[0170] Data pads 173 and connection pads 172 can be configured to follow the uneven shape of the top surface of the base layer 105.

[0171] Data pad 173 can transmit data signals from connection line 180, which serves as a data line, to a plurality of sub-pixels SP. Data pad 173 can be connected to the source electrode 153 of transistor 150 through contact holes formed in planarization layer 115.

[0172] Furthermore, the connection pad 172 can transmit gate signals from the connection line 180, which serves as a gate line, to a plurality of sub-pixels SP. The connection pad 172 can be connected to the gate pad 171 through contact holes formed in the planarization layer 115 and the interlayer insulating layer 114, and gate signals can be transmitted to the gate pad 171. The connection pad 172 can be made of the same material as the data pad 173, but is not limited thereto.

[0173] A dam 116 may be provided on the planarization layer 115, the first electrode 166, and the second electrode 167. The dam 116 may be configured to overlap with the end of the reflective layer 183, and the portion of the reflective layer 183 that does not overlap with the dam 116 may be defined as a light-emitting region. The dam 116 may be made of an organic insulating material and may be made of the same material as the planarization layer 115. Furthermore, the dam 116 may be configured to contain a black material to suppress color mixing caused by light emitted from the LED 160 being transmitted to adjacent sub-pixels SP. For example, the dam 116 may be made of polyimide, acrylic resin, or benzocyclobutene (BCB) resin, but is not limited thereto.

[0174] The embankment 116 may have unevenness corresponding to the uneven shape of the top surface of the base layer 105.

[0175] A stretchable display panel 110 according to an exemplary embodiment of the present disclosure may include an LED 160. In this case, since the LED 160 is made of inorganic materials instead of organic materials, it has excellent reliability and a longer lifespan than liquid crystal display elements or organic light-emitting diodes. Furthermore, the LED 160 not only has a fast light emission speed but also low power consumption, strong shock resistance, high stability, and excellent luminous efficiency, making it suitable for high-brightness image displays and ultra-large screen applications. In particular, since the LED 160 is made of inorganic materials instead of organic materials, the encapsulation layer required when using organic light-emitting diodes can be omitted. Therefore, the encapsulation layer, which may be easily damaged due to cracking during the stretching of the stretchable display panel 110, can be omitted. Therefore, by using the LED 160 as the display element, the stretchable display panel 110 according to an exemplary embodiment of the present disclosure can omit the use of an encapsulation layer that may be damaged when the stretchable display panel 110 is bent or stretched. Since LED 160 is made of inorganic materials rather than organic materials, the display elements of the stretchable display panel 110 according to an exemplary embodiment of this disclosure can be protected from moisture or oxygen, and can have excellent reliability.

[0176] A stretchable display panel 110 according to an exemplary embodiment of the present disclosure may have a structure in which a plurality of relatively rigid island substrates 111 are spaced apart from each other on a relatively flexible lower substrate 120. Therefore, in the stretchable display panel 110 according to an exemplary embodiment of the present disclosure, the stretchable display panel 110 may have a structure that allows for easier deformation even when the user stretches or bends it, and the stretchable display panel 110 may have a structure that minimizes damage to the components of the stretchable display panel 110 during deformation.

[0177] Connector 180 refers to wiring that electrically connects pads above a plurality of island substrates 111. Connector 180 may include a first connector 181 and a second connector 182. The first connector 181 refers to wiring in connector 180 extending in the X-axis direction, and the second connector 182 refers to wiring in connector 180 extending in the Y-axis direction.

[0178] In a typical stretchable display panel, various wirings, such as a plurality of gate lines and a plurality of data lines, are arranged to extend between a plurality of sub-pixels, and the plurality of sub-pixels are connected to a single signal line. Therefore, in a typical stretchable display device, various wirings, such as gate lines, data lines, high-potential power lines, and reference voltage lines, extend from one side of the stretchable display device to the other on the substrate without interruption.

[0179] Conversely, in a stretchable display panel 110 according to an exemplary embodiment of the present disclosure, various wirings made of metallic materials, such as gate lines, data lines, high-potential power lines, and reference voltage lines, can be disposed only above the plurality of island substrates 111. That is, in a stretchable display panel 110 according to an exemplary embodiment of the present disclosure, various wirings made of metallic materials can be disposed only above the plurality of island substrates 111 and can not contact the lower substrate 120. Therefore, various wirings can be patterned to correspond to the plurality of island substrates 111 and can be disposed discontinuously.

[0180] In a stretchable display panel 110 according to an exemplary embodiment of the present disclosure, in order to connect such discontinuous wiring, pads above two adjacent island substrates 111 can be connected by a connecting line 180. That is, the connecting line 180 can electrically connect the pads above two adjacent island substrates 111. Therefore, the stretchable display panel 110 of the present disclosure can include a plurality of connecting lines 180 to electrically connect various types of wiring, such as gate lines, data lines, high-potential power lines, and reference voltage lines, between a plurality of island substrates 111. For example, gate lines can be provided above a plurality of island substrates 111 arranged adjacent to each other in the X-axis direction, and gate pads 171 can be provided at both ends of the gate lines. In this case, a plurality of gate pads 171 above a plurality of island substrates 111 arranged adjacent to each other in the X-axis direction can be connected to each other by connecting lines 180 used as gate lines. Therefore, the gate lines provided above the plurality of island substrates 111 and the connecting line 180 provided above the lower substrate 120 can be used as a single gate line. That is, all kinds of wiring that can be included in the stretchable display panel 110, such as data lines, high-potential power lines and reference voltage lines, can also be used as a single wiring via the connection line 180 as described above.

[0181] The first connection line 181 can electrically connect the pads above two island substrates 111 arranged side-by-side among the pads above a plurality of island substrates 111 arranged adjacent to each other in the X-axis direction. The first connection line 181 can be used as a gate line or a low-potential power line, but is not limited thereto. For example, the first connection line 181 can be used as a gate line, and the gate pads 171 above two island substrates 111 arranged side-by-side in the X-axis direction can be electrically connected through contact holes formed in the embankment 116. Therefore, as described above, the gate pads 171 above a plurality of island substrates 111 in the X-axis direction can be connected to each other through the first connection line 181 used as a gate line, and a gate signal can be transmitted.

[0182] The first connecting line 181 can be set in the first wiring area WA1.

[0183] The second connection line 182 can electrically connect pads on two island substrates 111 arranged side-by-side among a plurality of island substrates 111 arranged adjacent to each other in the Y-axis direction. The second connection line 182 can be used as a data line, a high-potential power line, or a reference voltage line, but is not limited thereto. For example, the second connection line 182 can be used as a data line, and data pads 173 on two island substrates 111 arranged side-by-side in the Y-axis direction can be electrically connected through contact holes formed in the embankment 116. Therefore, as described above, the data pads 173 on a plurality of island substrates 111 arranged in the Y-axis direction can be connected to each other through a plurality of second connection lines 182 used as data lines, and a data signal can be transmitted.

[0184] The second connecting line 182 can be set in the second wiring area WA2.

[0185] The connecting line 180 may contain a base polymer and conductive particles. For example, the first connecting line 181 may contain a base polymer and conductive particles, and the second connecting line 182 may contain a base polymer and conductive particles.

[0186] The first connection line 181 can be configured to contact the top and side surfaces of the embankment 116 disposed above the island substrate 111, the planarization layer 115, the interlayer insulating layer 114, the buffer layer 112, and the side surfaces of the plurality of island substrates 111, and can be configured to extend to the top surface of the lower substrate 120. Therefore, the first connection line 181 can contact the top surface of the lower substrate 120, contact the side surfaces of adjacent island substrates 111, and simultaneously contact the side surfaces of the buffer layer 112, the gate insulating layer 113, the interlayer insulating layer 114, the planarization layer 115, and the embankment 116 disposed above the adjacent island substrates 111. In addition, the first connection line 181 can contact the connection pad 172 disposed above the adjacent island substrates 111, but is not limited thereto.

[0187] In this configuration, the base polymer of the first connecting line 181 can be made of an insulating material capable of being bent or stretched similarly to the lower substrate 120. The base polymer may include, for example, styrene-butadiene-styrene (SBS), but is not limited thereto. Therefore, the base polymer can remain undamaged when the stretchable display panel 110 is bent or stretched. The base polymer can be formed by coating the material constituting the base polymer over the lower substrate 120 and the island substrate 111, or by applying the material using slits, but is not limited thereto.

[0188] The conductive particles of the first connecting line 181 can be dispersed in the base polymer. In this case, the first connecting line 181 can contain conductive particles dispersed in the base polymer at a certain concentration. The first connecting line 181 can be formed, for example, by uniformly stirring the conductive particles into the base polymer, then coating the base polymer containing the dispersed conductive particles over the lower substrate 120 and the island substrate 111 and allowing it to cure, but is not limited thereto. The conductive particles can include at least one of silver (Ag), gold (Au), and carbon, but are not limited thereto.

[0189] Conductive particles dispersed in the base polymer of the first connection line 181 can form conductive paths that electrically connect the connection pads 172 respectively disposed above adjacent island substrates 111. Furthermore, the conductive particles can electrically connect the gate pad 171 formed above the outermost island substrate 111 of the plurality of island substrates 111 to pads disposed in the non-active region NA to form conductive paths.

[0190] The base polymer of the first interconnect 181 and the conductive particles dispersed in the base polymer can connect the pads disposed above adjacent island substrates 111 to each other in a straight line. Therefore, during the manufacturing process, the base polymer can be formed into a straight line connecting the pads disposed on each of the plurality of island substrates 111. Thus, the conductive path formed by the conductive particles dispersed in the base polymer can also have a straight line shape. However, the forming process and shape of the base polymer and conductive particles of the first interconnect 181 are not limited to this.

[0191] The second connection line 182 can be formed to contact the top and side surfaces of the embankment 116, the planarization layer 115, the interlayer insulating layer 114, the buffer layer 112, and the side surfaces of the plurality of island substrates 111 disposed above the island substrate 111, and can be formed to extend to the top surface of the lower substrate 120. Therefore, the second connection line 182 can contact the top surface of the lower substrate 120, contact the side surfaces of adjacent island substrates 111, and simultaneously contact the buffer layer 112, the data insulating layer 113, the interlayer insulating layer 114, the planarization layer 115, and the side surfaces of the embankment 116 disposed above the adjacent island substrates 111. In addition, the second connection line 182 can contact the data pads 173 disposed above the adjacent island substrates 111, but is not limited thereto.

[0192] Furthermore, the base polymer of the second connecting line 182 can be made of an insulating material that can be bent or stretched similarly to the lower substrate 120, and can be the same material as the base polymer of the first connecting line 181. The base polymer can include, for example, SBS, but is not limited thereto.

[0193] The conductive particles of the second connecting line 182 can be dispersed in the base polymer. For example, the second connecting line 182 can contain conductive particles dispersed in the base polymer at a certain concentration. The concentration of conductive particles dispersed on the base polymer of the second connecting line 182 and the concentration of conductive particles dispersed in the lower part of the base polymer can be substantially the same. Furthermore, the manufacturing process of the second connecting line 182 can be the same as the manufacturing process of the first connecting line 181, and can be performed simultaneously.

[0194] Conductive particles dispersed in the base polymer of the second connection line 182 can form conductive paths that electrically connect data pads 173 respectively disposed above adjacent island substrates 111. Furthermore, the conductive particles can electrically connect the data pads 173 formed above the outermost island substrate 111 of the plurality of island substrates 111 to pads disposed in the non-active region NA to form conductive paths.

[0195] The base polymer of the second connection line 182 and the conductive particles dispersed in the base polymer can connect the pads disposed above adjacent island substrates 111 to each other in a straight line shape. Therefore, during the manufacturing process, the base polymer can be formed into a straight line shape connecting the pads disposed above each of the plurality of island substrates 111. Thus, the conductive path formed by the conductive particles dispersed in the base polymer can also have a straight line shape. However, the forming process and shape of the base polymer and conductive particles of the second connection line 182 are not limited to this.

[0196] In some exemplary embodiments, conductive particles dispersed in the base polymer of the connecting line 180 can be dispersed to create a concentration gradient within the base polymer.

[0197] For example, the concentration of conductive particles can be reduced from the top to the bottom of the base polymer, so that the conductivity due to the conductive particles is highest in the top of the base polymer. In this case, specifically, a conductive precursor can be applied to the top surface of the base polymer using an ink printing process, and the conductive particles can be injected onto the base polymer for dispersion therein.

[0198] During the process of injecting conductive particles onto a base polymer, the polymer may swell several times, allowing the conductive particles to penetrate into the void spaces of the base polymer. When the base polymer with the injected conductive particles is immersed in a reducing agent or reduced by vapor, a connecting line 180 can be formed.

[0199] Therefore, the permeation region at the top of the base polymer can have a sufficiently high concentration of conductive particles to form a conductive path.

[0200] The thickness of the penetration region of the conductive particles in the upper part of the base polymer, which is dispersed at a high concentration, can vary depending on the injection time and intensity of the conductive particles on the top surface of the base polymer. For example, the thickness of the penetration region may become thicker when the injection time or intensity of the conductive particles on the top surface of the base polymer increases. Furthermore, in the upper part of the base polymer, each conductive particle can contact another conductive particle, thus forming a conductive path through the contacting conductive particles, thereby allowing the transmission of electrical signals.

[0201] In some exemplary embodiments, the base polymer of the interconnect 180 can be formed as a single layer over the lower substrate 120 between adjacent island substrates 111. Specifically, the base polymer can be configured to contact the lower substrate 120 as a single layer in the region between the island substrates 111 that are closest to each other in the X-axis direction. The base polymer can be formed to overlap with all the plurality of pads arranged side by side on one side of an island substrate 111. Conductive particles can then be formed individually to form a plurality of conductive paths corresponding to each pad on the single layer of base polymer. Thus, the conductive paths formed by the conductive particles can connect the pads arranged on adjacent island substrates 111 to each other in a straight line shape, and for example, conductive particles can be injected to form four conductive paths on the top surface of the base polymer arranged as a single layer between the plurality of island substrates 111.

[0202] In some exemplary embodiments, the base polymer of the interconnect 180 can be disposed over the entire area except for the region where the plurality of island substrates 111 are disposed. The base polymer can be disposed as a monolayer in contact with the lower substrate 120 in all areas except for the areas overlapping with the plurality of rigid substrates (i.e., the plurality of island substrates 111). Therefore, in the lower substrate 120, the area except for the area overlapping with the plurality of island substrates 111 can be covered by the base polymer, and the base polymer can contact the pads of the plurality of island substrates 111 such that a portion of the base polymer can be disposed to cover the edges of the plurality of island substrates 111. Then, conductive particles can form conductive paths connecting the pads on adjacent plurality of island substrates 111 over the base polymer.

[0203] When the base polymer is applied as a single layer to the entire area of ​​the lower substrate 120 excluding the area where the plurality of island substrates 111 are located, the base polymer can be formed by applying it to the entire area of ​​the lower substrate 120 excluding the area where the plurality of island substrates 111 are located. Therefore, a separate process for patterning the base polymer may not be necessary. Thus, the manufacturing process of the base polymer and the interconnects can be simplified, and process costs and time can be reduced.

[0204] By applying the base polymer as a single layer over the entire area of ​​the lower substrate 120, excluding the area where the plurality of island substrates 111 are disposed, the force applied when the stretchable display panel 110 is bent or stretched can be dispersed. Furthermore, in some exemplary embodiments, the top surface of the base polymer of the connecting lines 180 may be flat.

[0205] For example, with Figure 5 As shown, the top surface of the base polymer of the connecting lines 180 (e.g., gate lines and data lines) can be higher than the top surface of the planarization layer 115 above the plurality of island substrates 111. The top surface of the base polymer can also be higher than the top surface of the embankment 116 above the plurality of island substrates 111. Therefore, in the base polymer of the connecting lines 180, the height of the top surface in the portion of the base polymer overlapping with the plurality of island substrates 111 and the height of the top surface in the region disposed between the plurality of island substrates 111 can be the same. Therefore, the top surface of the connecting lines 180 can be flat. Therefore, the top surface of the conductive particles dispersed on the base polymer can have a straight shape without curvature in a cross-sectional view.

[0206] Because of the various components arranged on a plurality of island substrates 111 spaced apart above the lower substrate 120, steps may exist between the top surface of the embankment 116 and the top surface of the lower substrate 120. In this case, the base polymer itself may break due to the steps on the top surface of the base polymer, thus the electrical path between the pads provided on adjacent island substrates 111 may be blocked, and the defect rate of the stretchable display device may increase.

[0207] In this configuration, when the top surface of the base polymer is flat, the step between the top surface of the element disposed above the plurality of island substrates 111 and the top surface of the lower substrate 120 on which the plurality of island substrates 111 are not disposed can be eliminated. Therefore, even if the stretchable display panel 110 is bent or stretched, the connecting lines 180 containing the base polymer and conductive particles can be prevented from breaking due to the step. Furthermore, by making the top surface of the base polymer flat, damage to the connecting lines 180 during the manufacturing process of the stretchable display panel 110 can be minimized.

[0208] As described above, since stretchable display devices should have the characteristic of being easy to bend or stretch, substrates with relatively high flexibility and low modulus can be used. For example, flexible materials with low modulus, such as polydimethylsiloxane (PDMS), can be used to manufacture the substrate. When such a low-modulus material is used as the lower substrate on which display elements are disposed during manufacturing, the substrate may be damaged by heat (e.g., temperatures of 100°C or higher) generated during the process of forming transistors or display elements due to the thermosensitive nature of the low-modulus material.

[0209] Therefore, display elements should be formed on a substrate made of a material capable of withstanding high temperatures to prevent damage to the substrate during the process of forming the display elements. Thus, materials capable of withstanding the high temperatures generated during the manufacturing process, such as polyimide (PI), have been attempted to be used to form the substrate. However, materials capable of withstanding high temperatures have a high modulus and therefore lack high flexibility, making it difficult to bend or stretch the substrate during the stretching of a stretchable display device.

[0210] Therefore, in a stretchable display panel 110 according to an exemplary embodiment of the present disclosure, a plurality of island substrates 111, which are rigid substrates, may be disposed only in the area where transistors 150 or LEDs 160 are provided, in order to suppress the plurality of island substrates 111 from being damaged by high temperature during the manufacture of transistors 150 or LEDs 160.

[0211] Furthermore, in a stretchable display panel 110 according to an exemplary embodiment of the present disclosure, a lower substrate 120, which is a flexible substrate, can be disposed below a plurality of island substrates 111. Therefore, since the remaining areas of the lower substrate 120 and the upper substrate, excluding the areas overlapping with the plurality of island substrates 111, can be easily stretched or bent, a stretchable display panel 110 can be realized. Furthermore, when the stretchable display panel 110 is bent or stretched, damage to transistors 150, light-emitting diodes 160, etc., disposed above the plurality of rigid island substrates 111 can be prevented.

[0212] Meanwhile, when the stretchable display panel is bent or stretched, the lower substrate, made of a flexible substrate, may deform, while the island substrates, on which the display elements are disposed, made of a rigid substrate, may not deform. In this case, if the wiring connecting the pads disposed above the plurality of island substrates is not made of a material that can be easily bent or stretched, the wiring may be damaged, for example, by cracks caused by the deformation of the lower substrate.

[0213] Conversely, in a stretchable display panel 110 according to an exemplary embodiment of the present disclosure, connecting lines 180 comprising a base polymer and conductive particles can electrically connect pads disposed on each of a plurality of island substrates 111. The base polymer may have flexibility that allows for easy deformation. Therefore, even if the stretchable display panel 110 is bent or stretched, the connecting lines 180 comprising the base polymer can be easily deformed in the region between the plurality of island substrates 111.

[0214] Furthermore, in the stretchable display panel 110 according to an exemplary embodiment of this disclosure, since the connecting lines 180 contain conductive particles, the conductive paths made of the conductive particles will not be damaged due to breakage or the like, even when the base polymer is deformed. For example, when the stretchable display panel 110 is bent or stretched, the lower substrate 120, which is a flexible substrate, can deform in the remaining area except for the area where a plurality of island substrates 111, which are rigid substrates, are provided. In this case, the distance between the plurality of conductive particles disposed above the deformed lower substrate 120 can be changed. At this time, the concentration of the plurality of conductive particles disposed on the base polymer to form conductive paths can be kept high, so that electrical signals can be transmitted even if the distance between the plurality of conductive particles increases. Therefore, even when the base polymer is bent or stretched, the conductive paths formed by the plurality of conductive particles can transmit electrical signals smoothly, and even when the stretchable display panel 110 is bent or stretched, electrical signals can be transmitted between the individual pads.

[0215] Furthermore, in the stretchable display panel 110 according to an exemplary embodiment of the present disclosure, since the connecting lines 180 comprise a base polymer and conductive particles, the connecting lines 180 connecting the respective pads disposed above adjacent plurality of island substrates 111 can be arranged with the shortest distance, i.e., in a straight line shape. That is, the stretchable display panel 110 can be realized even if the connecting lines 180 do not form a curved shape. The conductive particles of the connecting lines 180 can be dispersed in the base polymer to form conductive paths. Furthermore, when the stretchable display panel 110 is bent or stretched, the conductive paths formed by the conductive particles can be bent or stretched. In this case, although the distance between the conductive particles may change, the conductive paths formed by the conductive particles can still transmit electrical signals. Therefore, in the stretchable display panel 110 according to an exemplary embodiment of the present disclosure, the space occupied by the connecting lines 180 can be minimized.

[0216] An upper adhesive layer 118 may be provided on the lower substrate 120 configured as described above. However, this disclosure is not limited to this, and the upper adhesive layer 118 may be a planarization layer ( Figure 2 Replace 125 in the middle.

[0217] Meanwhile, as mentioned above, when using a lens with a large curvature to expand the field of view (FoV) of a light field display device, the beam convergence decreases as the viewing direction deviates from the front due to lens aberrations, resulting in a deterioration of 3D image quality due to increased crosstalk.

[0218] Therefore, in one exemplary embodiment of this disclosure, a display element, such as an LED 160, is disposed on the focal plane of the lens 130 by using a stretchable display panel 110. Thus, a wider FoV than before can be achieved without optical loss. This will be described in more detail with reference to the accompanying drawings.

[0219] Figure 6 and Figure 7 To be Figure 2 An enlarged view of part A.

[0220] Figure 8 and Figure 9 A diagram showing brightness based on viewing angle.

[0221] As an example Figure 6 The outline of light emitted from a display element located at the focal plane P1 of lens 130 in the frontal direction of lens 130 is shown, and as an example, Figure 7 The outline of light emitted from a display element located at the focal plane P2 of lens 130 in the viewing direction of lens 130 is shown.

[0222] As an example Figure 8 A comparative implementation scheme is shown based on the brightness of the viewing angle, and as an example, Figure 9 An exemplary implementation is shown, which is based on the brightness according to the viewing angle.

[0223] When using cylindrical lenses with high curvature, FoV expansion is possible even with short lens spacing. However, the greater the curvature, the greater the difference in focal length between the frontal and spectral directions due to increased lens aberrations, leading to decreased beam convergence and increased crosstalk.

[0224] On the other hand, when using cylindrical lenses with small curvature, the beam convergence in the viewing direction is improved, but the lens spacing increases, which has the disadvantage of reducing 2D resolution.

[0225] Typically, because the subpixels set in the display panel exist on a flat surface, the focal plane may move further in the viewing direction when using a lens with a large curvature.

[0226] In this regard, refer to Figure 6 and Figure 7 The present disclosure is characterized in that the display element is disposed on the focal planes P1 and P2 of the lens 130 to compensate for the aberrations of the lens 130 which has a large curvature.

[0227] Because this allows for aberration compensation, light emitted not only from the display element located at the focal plane P1 in the frontal direction of the lens 130, but also from the display element located at the focal plane P2 in the viewing direction of the lens 130 can have improved beam convergence.

[0228] Reference Figure 8 In the case of the comparative implementation scheme, it can be seen that the beam convergence decreases as the viewing angle direction moves from 0° to 30° in the frontal direction.

[0229] That is, as the viewing angle increases, the beam convergence decreases rapidly.

[0230] Reference Figure 9 In the case of the exemplary embodiment, it can be seen that the beam convergence hardly decreases as the viewing angle direction moves from 0° to 30° in the frontal direction.

[0231] That is, it can be seen that even with the increase in viewing angle, the change in beam convergence is very small.

[0232] Furthermore, this disclosure can be applied to large display devices, such as video wall displays, which will be described in detail with reference to the accompanying drawings.

[0233] Figure 10 This is a cross-sectional view of a display device according to another exemplary embodiment of the present disclosure.

[0234] Figure 11 To show Figure 10 A top view of a portion of the display panel.

[0235] exist Figure 10 and Figure 11 In the display device 200 shown according to another exemplary embodiment, with Figures 1 to 7 The only difference between the display device 100 shown according to the exemplary embodiment is that it is a video wall display device, and the other configurations are substantially the same; therefore, redundant descriptions will be omitted. Furthermore, the same reference numerals will be used for the same configurations, and descriptions of the same reference numerals can be found by referring to… Figures 1 to 7 .

[0236] Reference Figure 10 and Figure 11 According to another exemplary embodiment of the present disclosure, a display device 200 for displaying three-dimensional images may include splicing display panels 210a, 210b, 210c, 210d and 210e disposed above a support plate 101, and a lens 230 disposed above the display panels 210a, 210b, 210c, 210d and 210e.

[0237] Display panels 210a, 210b, 210c, 210d and 210e may be miniature light-emitting diode display panels, but are not limited to them.

[0238] Display panels 210a, 210b, 210c, 210d and 210e can be stretchable display panels.

[0239] According to another exemplary embodiment of the present disclosure, a display device 200 for displaying three-dimensional images is configured with splicing display panels 210a, 210b, 210c, 210d and 210e, but is driven as if driving images on a single screen, so that image information can be effectively provided to many people in public places.

[0240] In particular, since large display devices (e.g., 100-inch or larger) are installed for special purposes and the demand is not constant, it may be more practical to form splicing display panels 210a, 210b, 210c, 210d and 210e by combining multiple display panels 210a, 210b, 210c, 210d and 210e into a single display panel, rather than implementing a large display device with a single display.

[0241] The support plate 101 and the base layer 105 can each be configured as a single configuration, but are not limited thereto, and can also be configured as a plurality of configurations corresponding to a plurality of display panels 210a, 210b, 210c, 210d and 210e.

[0242] Meanwhile, the support member 270 forming a space separated from the lens 230 can be disposed between a plurality of display panels 210a, 210b, 210c, 210d and 210e.

[0243] For example, the support member 270 can be integrally formed during the injection molding of the base layer 105, or it can be separately machined and attached to the base layer 105. In addition, the support member 270 can be formed on the top surface of a plurality of display panels 210a, 210b, 210c, 210d and 210e.

[0244] The space between the plurality of display panels 210a, 210b, 210c, 210d and 210e, which are provided with support members 270, and the lens 230 can be filled with air, but is not limited thereto, and a planarization layer of the above exemplary embodiments can also be provided therein.

[0245] Exemplary embodiments of this disclosure can also be described as follows:

[0246] According to one aspect of this disclosure, a display apparatus for displaying a three-dimensional image is provided. The display apparatus for displaying a three-dimensional image may include a support plate; a base layer disposed above the support plate; a display panel disposed above the base layer and divided into a plurality of sub-pixels, each including a display element; and a lens disposed above the display panel, the display elements being disposed along the focal plane of the lens.

[0247] The display device may also include a first adhesive layer between the base layer and the display panel.

[0248] The first adhesive layer may contain an optically clear adhesive (OCA) or an optically clear resin (OCR).

[0249] Display elements may include either micro light-emitting diodes (μ-LEDs) or organic light-emitting diodes.

[0250] The display panel can be a flexible, stretchable panel.

[0251] The top surface of the base layer can have an uneven profile along the focal plane of the lens.

[0252] The display panel may have components and layers containing display elements arranged along an uneven profile of the top surface of the base layer.

[0253] The display device may also include a planarization layer disposed between the display panel and the lens.

[0254] The display device may also include a second adhesive layer disposed between the planarization layer and the lens.

[0255] The second adhesive layer may contain an optically clear adhesive (OCA) or an optically clear resin (OCR).

[0256] The lenses can be arranged side by side in a first direction and a second direction perpendicular to the first direction, and each sub-pixel can extend in a direction inclined relative to the first and second directions.

[0257] Lenses can include lenticular lenses (biconvex lenses).

[0258] Five sub-pixels can overlap with one of the lenses.

[0259] A display panel may be a splicing display panel in which a plurality of display panels are combined to form a single panel.

[0260] The display device may also include a support member disposed between a plurality of display panels to define a predetermined space together with a lens.

[0261] Supporting components can be mounted on the top surface of multiple display panels.

[0262] Support components can be attached to the base layer between multiple display panels.

[0263] According to another aspect of this disclosure, a display apparatus for displaying a three-dimensional image is provided. The display apparatus for displaying a three-dimensional image may include a display panel disposed above a base layer and divided into a plurality of subpixels, each including a display element, and a lens disposed above the display panel. The top surface of the base layer may have an uneven profile along the curvature of the lens, and the display elements are disposed along the uneven profile of the base layer.

[0264] While exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be implemented in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are exemplary in all respects and do not limit the present disclosure. All technical concepts within the equivalent scope of the present disclosure should be construed as falling within the scope of the present disclosure.

Claims

1. A display device for displaying three-dimensional images, comprising: Support plate; A base layer is disposed above the support plate; The display panel is disposed above the base layer and is divided into a plurality of sub-pixels, each including a display element; as well as The lens is positioned above the display panel. The display element is disposed along the focal plane of the lens.

2. The display device according to claim 1, further comprising: A first adhesive layer between the base layer and the display panel.

3. The display device according to claim 2, wherein the first adhesive layer comprises an optically transparent adhesive or an optically transparent resin.

4. The display device according to claim 1, wherein the display element comprises one of a micro light-emitting diode and an organic light-emitting diode.

5. The display device according to claim 1, wherein the display panel is a flexible, stretchable panel.

6. The display device according to claim 1, wherein the top surface of the base layer has an uneven profile along the focal plane of the lens.

7. The display device of claim 6, wherein the display panel has an assembly and a layer comprising the display element disposed along the uneven profile of the top surface of the base layer.

8. The display device according to claim 1, further comprising: A planarization layer is disposed between the display panel and the lens.

9. The display device according to claim 8, further comprising: A second adhesive layer is disposed between the planarization layer and the lens.

10. The display device of claim 9, wherein the second adhesive layer comprises an optically transparent adhesive or an optically transparent resin.

11. The display device of claim 1, wherein the lens comprises a plurality of lenses arranged side by side in a first direction and a second direction perpendicular to the first direction, and each of the sub-pixels extends in a direction inclined relative to the first direction and the second direction.

12. The display device according to claim 1, wherein the lens comprises a cylindrical lens.

13. The display device of claim 1, wherein the lens comprises a plurality of lenses, and five sub-pixels overlap with one of the plurality of lenses.

14. The display device according to claim 1, wherein the display panel includes a splicing display panel in which a plurality of display panels are combined to form a single panel.

15. The display device according to claim 14, further comprising: A support member is disposed between the plurality of display panels to define a predetermined space together with the lens.

16. The display device according to claim 15, wherein the support member is disposed on the top surface of the plurality of display panels.

17. The display device of claim 15, wherein the support member is attached to the base layer between the plurality of display panels.

18. A display device for displaying three-dimensional images, comprising: The display panel is disposed above the base layer and is divided into a plurality of sub-pixels, each including a display element; as well as The lens is positioned above the display panel. The top surface of the base layer has an uneven profile along the curved shape of the lens, and the display element is disposed along the uneven profile of the base layer.

Images