Stereoscopic image display device

Abstract

A stereoscopic image display device according to an exemplary embodiment of the present disclosure includes a substrate divided into a plurality of sub-pixels each including a light emitting region, a light emitting diode disposed in the light emitting region of the substrate, a color filter disposed above the light emitting diode and overlapping the light emitting region, an optical member disposed above the color filter and including a plurality of high-refractive layers and a plurality of low-refractive layers, an upper side of each of the high-refractive layers being longer than a lower side, the plurality of low-refractive layers being disposed between the high-refractive layers, and an optical lens disposed above the optical member. A wider viewing angle is ensured while maintaining the same resolution to improve the quality of an image in which a user recognizes three dimensions.

Description

Technical Field

[0001] This disclosure relates to a stereoscopic image display device, and more specifically, for example, but not limited to, a stereoscopic image display device including an optical lens. Background Technology

[0002] A 3D display is simply defined as "a system that artificially reproduces 3D images or pictures." Here, the system includes the software technology for displaying 3D content and the hardware for implementing the 3D content created by that software.

[0003] A virtual 3D display (hereinafter referred to as a stereoscopic image display device) is a system that allows users to virtually experience three-dimensional effects on a flat display screen. Stereoscopic image display devices achieve this by utilizing binocular parallax, which is the slightly different image seen by each eye (because the eyes are approximately 65 mm apart in the horizontal direction). This is one of the various factors that allow humans to perceive depth.

[0004] As an example, even when our eyes are looking at the same object, each eye sees a slightly different image due to binocular parallax (more precisely, they slightly share spatial information from the left and right sides). When the two images are transmitted to the brain via the retina, the brain precisely combines them to create the perception of a three-dimensional effect. Stereoscopic display devices are devices that utilize this principle, creating a virtual three-dimensional effect by simultaneously displaying two images (e.g., a left image and a right image) on a 2D display device to transmit them to the eyes.

[0005] For example, a stereoscopic image display device may include an optical lens located above a light-emitting diode. The optical lens extends horizontally in one direction. For example, the optical lens may be a biconvex lens that realizes a stereoscopic image in a light field manner.

[0006] The descriptions provided in the Background section should not be considered prior art simply because they are mentioned in or related to the Background section. The Background section may include information describing one or more aspects of the subject matter art. Summary of the Invention

[0007] Typically, the field of view (FoV) is determined by the lens shape and optical clearance. In a typical light field display (LFD) structure, the lens pitch can be increased to extend the FoV. However, a drawback of increasing the pitch is that the 3D horizontal resolution is proportionally reduced.

[0008] One aspect of this disclosure is to provide a stereoscopic image display device that expands the FoV while maintaining 3D horizontal resolution.

[0009] Another aspect of this disclosure is to provide a stereoscopic image display device that overcomes the limitations of existing LFD structures and achieves clearer and more immersive stereoscopic images through a wider FoV.

[0010] Another aspect of this disclosure is to provide a stereoscopic image display device that provides high-quality stereoscopic images in various application areas, such as AR / VR, medical imaging, analog and digital signage.

[0011] The aspects of this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description other aspects not mentioned above.

[0012] According to one aspect of this disclosure, a stereoscopic image display device may include: a substrate divided into a plurality of sub-pixels, each including a light-emitting region; a light-emitting diode disposed in the light-emitting region of the substrate; a color filter disposed above the light-emitting diode and overlapping the light-emitting region; an optical component disposed above the color filter and including a plurality of high-refractive-index layers and a plurality of low-refractive-index layers, wherein the upper side of each high-refractive-index layer is longer than its lower side, and the plurality of low-refractive-index layers are disposed between the high-refractive-index layers; and an optical lens disposed above the optical component.

[0013] According to another aspect of this disclosure, a stereoscopic image display device includes: a substrate divided into a plurality of sub-pixels; a light-emitting diode (LED) disposed above the substrate; a color filter disposed above the LED; an optical component above the color filter, wherein a plurality of high-refractive-index layers and a plurality of low-refractive-index layers are alternately disposed; and an optical lens disposed above the optical component. Light from the LED is refracted at an angle greater than the angle of incidence at the interface between the low-refractive-index layers and the high-refractive-index layers, so as to be incident on the optical lens.

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

[0015] According to this disclosure, a wider field of view is ensured while maintaining the same resolution, thereby improving the quality of images for user 3D recognition.

[0016] According to this disclosure, flexibility in lens design is ensured, and highly immersive stereoscopic imaging is achieved to enhance competitiveness in various markets such as entertainment, education, and industrial applications.

[0017] The effects of this disclosure are not limited to the examples above, and many more different effects are included in this specification.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative, and are intended to provide further explanation of the claimed inventive concept. Attached Figure Description

[0019] The above and other aspects, features and other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings.

[0020] The accompanying drawings are included to provide a further understanding of this disclosure, and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. In the drawings:

[0021] Figure 1 This is a schematic view illustrating a stereoscopic image display device according to an exemplary embodiment of the present disclosure;

[0022] Figure 2 yes Figure 1 Circuit diagram of sub-pixels of a stereoscopic image display device;

[0023] Figure 3 It is magnification Figure 1 The view of part A;

[0024] Figure 4 It is shown Figure 1 A view of the cross-sectional structure of part A;

[0025] Figure 5 It is shown Figure 1 The FoV view of a stereoscopic image display device;

[0026] Figure 6 This is a view showing the FoV according to a comparative embodiment;

[0027] Figure 7 It is a graph showing the brightness according to the viewing angle;

[0028] Figure 8 It is a graph showing the brightness according to the viewing angle;

[0029] Figure 9 This is a cross-sectional view of a stereoscopic image display device according to another exemplary embodiment of the present disclosure; and

[0030] Figure 10 This is a cross-sectional view of a stereoscopic image display device according to yet another exemplary embodiment of the present disclosure.

[0031] Throughout the accompanying drawings and detailed description, unless otherwise stated, the same reference numerals should be understood to denote the same elements, features, and structures. For clarity, illustration, and convenience, the relative dimensions and depictions of these elements may be exaggerated. Detailed Implementation

[0032] Descriptions of embodiments of this disclosure will now be given in detail, examples of which are illustrated in the accompanying drawings. In the following description, detailed descriptions of well-known functions or configurations relevant to this document will be omitted where such obscuration unnecessarily obscures the essential points of the inventive concept. The described progression of processing steps and / or operations is merely illustrative; however, the order of steps and / or operations is not limited to the order set forth herein and can be varied as is known in the art, except for steps and / or operations that must occur in a specific order. The names of the various elements used in the following description may have been chosen solely for ease of writing and may therefore differ from those used in actual products.

[0033] The advantages and features of this disclosure, as well as methods for achieving these advantages and features, will become clear from the exemplary embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. Exemplary embodiments are provided by way of example only to enable those skilled in the art to fully understand the content and scope of this disclosure.

[0034] The shapes (e.g., size, length, width, height, thickness, position, radius, diameter, and area), ratios, angles, quantities, etc., shown in the accompanying drawings used 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 explanations of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Terms such as “comprising,” “having,” and “consisting of” as used herein are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” Unless otherwise expressly stated, any reference to the singular may include the plural.

[0035] The term "or" indicates "inclusive or" rather than "exclusive or". That is, unless otherwise stated or clearly understood from the context, the expression "x uses a or b" refers to any of the natural inclusive permutations. For example, "a or b" can mean "a", "b", or "a and b". For example, "a, b, or c" can mean "a", "b", "c", "a and b", "b and c", "a and c", or "a, b, and c".

[0036] Even if not explicitly stated, components are to be interpreted as including a normal tolerance range. Any implementation described herein as an "example" is not necessarily to be construed as preferred or advantageous over other implementations.

[0037] When using terms such as “above,” “over,” “below,” and “next to” to describe the positional relationship between two parts, one or more parts may be located between the two parts unless these terms are used in conjunction with the terms “immediately adjacent” or “directly.”

[0038] When a component or layer is placed "on" another component or layer, the component or layer can be located directly on the other component or layer, or another component or layer can be inserted between the two.

[0039] When describing temporal relationships (e.g., when time sequence is described as such as "after", "following", "next", and "before"), discontinuous situations may be included unless more restrictive terms such as "exactly", "immediately", or "directly" are used.

[0040] Terms such as “below,” “lower,” “above,” and “upper” may be used herein to describe the relationships between elements as shown in the accompanying drawings. It should be understood that these terms are spatially relative and based on the orientation depicted in the drawings.

[0041] Although the terms "first," "second," "A," "B," "(a)," "(b)," etc., are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from others. Therefore, the first component mentioned below can be a second component in the technical concept of this disclosure.

[0042] Throughout the specification, the same reference numerals generally denote the same elements.

[0043] For ease of description, the dimensions and thickness of each component shown in the accompanying drawings are illustrated, and this disclosure is not limited to the dimensions and thickness of the components shown.

[0044] The term “at least one” should be understood to include any and all combinations of one or more of the related listed items. For example, “at least one of the first element, the second element, and the third element” means all combinations of the three listed elements, combinations of any two of the three elements, and each individual element (i.e., the first element, the second element, or the third element).

[0045] Features of the various embodiments of this disclosure may be attached or combined with each other in part or in whole, and may be technically interlocked and operated in various ways, and these embodiments may be implemented independently of each other or in relation to each other.

[0046] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. It should also be understood that terms (e.g., terms as defined in a common dictionary) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein. For example, as one of ordinary skill in the art will understand, the terms “part” or “unit” may be applied to, for example, a single circuit or structure, an integrated circuit, a computational block of a circuit arrangement, or any structure configured to perform the described functions.

[0047] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0048] Figure 1 This is a schematic view illustrating a stereoscopic image display device according to an exemplary embodiment of the present disclosure.

[0049] Reference Figure 1 The stereoscopic image display device 100 according to an exemplary embodiment of the present disclosure may include a display panel 110.

[0050] The display panel 110 can be of various types (e.g., an organic light-emitting display panel or a liquid crystal display panel), but is not limited thereto. In the following description, for ease of description, an organic light-emitting display panel will be used as an example.

[0051] Display panel 110 can generate images to be provided to the user.

[0052] For example, in display panel 110, multiple sub-pixels SP can be arranged in a matrix. 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 gating line GL for applying gating signals, a data line DL for applying data signals, and a power supply line PL for providing power supply voltage. The implementation is not limited thereto. As an example, one or more additional signal lines may be additionally or alternatively included.

[0053] The strobe line GL can be electrically connected to the strobe driver GD. Additionally, the data line DL can be electrically connected to the data driver DD.

[0054] The strobe driver GD and the data driver DD can be controlled by the timing controller TC. The strobe driver GD receives 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.

[0055] In addition, the power supply line PL can be electrically connected to the power supply unit PU.

[0056] Display panel 110 may include a display area AA in which a plurality of subpixels SP are disposed, and a non-display area NA located outside the display area AA. For example, the non-display area NA may be located outside the display area AA. For example, the display area AA may be partially or completely surrounded by the non-display area NA. As an example, the non-display area NA may be at least partially invisible from the front of the display panel 110, for example by bending at least partially toward the back of the display panel 110, but is not limited thereto. As an example, the non-display area NA may be flat.

[0057] The display area AA is the area in the stereoscopic image display device 100 in which images are displayed, and display elements and various driving elements for driving the display elements can be disposed in the display area AA.

[0058] For example, a display element can be composed of a light-emitting diode including a first electrode, a light-emitting layer, and a second electrode.

[0059] In addition, various driving elements (e.g., thin-film transistors, capacitors, or wiring) used to drive the display elements can be disposed in the display area AA.

[0060] Multiple subpixels (SPs) can be disposed within the display area (AA). A subpixel SP is the smallest unit constituting the image, and each of the multiple subpixels SPs may include a light-emitting diode (LED) and driving circuitry. Furthermore, the multiple subpixels SPs may emit light of different wavelengths. For example, the multiple subpixels SPs may include at least one red subpixel, at least one green subpixel, and at least one blue subpixel, but are not limited thereto, and may also include at least one white subpixel. The implementation is not limited to these. As an example, subpixels emitting light of colors other than red, green, blue, and white (e.g., cyan, magenta, or yellow) may be additionally or alternatively included.

[0061] Furthermore, the driving circuit for the sub-pixel SP is a circuit used to control the driving of the light-emitting diode. For example, the driving circuit can be configured to include a thin-film transistor and a capacitor, but is not limited to this.

[0062] The non-display area NA is the area where no image is displayed, and various components used to drive the multiple sub-pixels SP set in the display area AA can be set in the non-display area NA. For example, a flexible film and a driver IC that provides signals for driving the multiple sub-pixels SP can be set, but are not limited to these.

[0063] like Figure 1As shown, the non-display area NA can be the area surrounding the display area AA. However, it is not limited to this, and for example, the non-display area NA can be the area extending from the display area AA.

[0064] The gating driver GD, data driver DD, timing controller TC, and power supply unit PU can be located outside the display area AA. For example, each signal line GL, DL, and PL can include an area located on the non-display area NA.

[0065] As an example, at least one of the gate driver GD, data driver DD, timing controller TC, and power supply unit PU may be located on the non-display area NA, but is not limited thereto. For example, in the stereoscopic image display device 100 according to an exemplary embodiment of the present disclosure, the gate driver GD may be formed as an in-panel gate (GIP) type on the non-display area NA, but the present disclosure is not limited thereto. As an example, the gate driver GD, data driver DD, timing controller TC, and power supply unit PU may not all be located on the non-display area NA. As an example, the gate driver GD may be disposed on a separate panel or film and connected to the display panel 110 by tape auto-bonding (TAB), chip-on-glass (COG), chip-on-panel (COP), or chip-on-film (COF) methods, but is not limited thereto.

[0066] Figure 2 yes Figure 1 Circuit diagram of sub-pixels of a stereoscopic image display device.

[0067] Reference Figure 2 Based on the signals applied through signal lines GL, DL, and PL, each sub-pixel SP can emit light that represents a specific color.

[0068] For example, in each sub-pixel SP, a driving circuit DC electrically connected to the light-emitting diode 130 can be provided. The driving circuit DC of each sub-pixel SP can control the light-emitting diode 130 of the corresponding sub-pixel SP according to the signals applied through signal lines GL, DL, and PL. For example, the driving circuit DC of each sub-pixel SP can provide a driving current corresponding to the data signal to the light-emitting diode 130 of the corresponding sub-pixel SP according to a strobe signal.

[0069] Meanwhile, the drive current supplied by the drive circuit DC of each sub-pixel SP can be maintained for a specific period of time (e.g., one frame). For example, the drive circuit DC of each sub-pixel SP may include a first thin-film transistor ST, a second thin-film transistor DT, and a storage capacitor Cst. Implementations are not limited to this. As an example, it may also include one or more thin-film transistors or one or more storage capacitors.

[0070] The first thin-film transistor ST of each sub-pixel SP can transmit a data signal to the second thin-film transistor DT of the corresponding sub-pixel SP according to a gating signal. The first thin-film transistor ST of each sub-pixel SP can be used as a switching thin-film transistor. The first thin-film transistor ST may include a first active layer, a first gate, a first drain, and a first source. For example, the first gate of the first thin-film transistor ST of each sub-pixel SP is electrically connected to the corresponding gating line GL, and the first drain of the first thin-film transistor ST of each sub-pixel SP can be electrically connected to the corresponding data line DL.

[0071] The second thin-film transistor DT of each sub-pixel SP can generate a drive current corresponding to the data signal. As an example, the second thin-film transistor DT of each sub-pixel SP can be used as a driving thin-film transistor. The second thin-film transistor DT may include a second active layer, a second gate, a second drain, and a second source. For example, the second gate of the second thin-film transistor DT of each sub-pixel SP is electrically connected to the first source of the first thin-film transistor ST of the corresponding sub-pixel SP, and the second drain of the second thin-film transistor DT of each sub-pixel SP can be electrically connected to the corresponding power supply voltage line PL.

[0072] Figure 3 It is magnification Figure 1 The view of part A.

[0073] Figure 4 It is shown Figure 1 A view of the cross-sectional structure of part A.

[0074] Figure 3 As an example, a portion of the display panel 110 is shown where 14 sub-pixels SP1, SP2, and SP3 are provided. Furthermore, Figure 4 As an example, a section of the cross-section of the display panel 110 is shown where five sub-pixels SP1, SP2, and SP3 are arranged on a line.

[0075] exist Figure 3 and Figure 4 In the example shown, five sub-pixels SP1, SP2, SP3 (SP) correspond to one optical lens 150, but this disclosure is not limited thereto, and two or more or six or more sub-pixels SP may correspond to one optical lens 150.

[0076] Reference Figure 3 and Figure 4 The display panel 110 according to an exemplary embodiment of the present disclosure may include a pixel area provided with a plurality of sub-pixels SP1, SP2 and SP3 and a wiring area provided with various signal lines.

[0077] Multiple first sub-pixels SP1, second sub-pixels SP2, and third sub-pixels SP3 can be set in a pixel area.

[0078] For example, the first sub-pixel SP1 could be a red sub-pixel.

[0079] For example, the second sub-pixel SP2 could be a green sub-pixel.

[0080] For example, the third sub-pixel SP3 could be a blue sub-pixel. The implementation is not limited to this. As an example, the arrangement of the red, green, and blue sub-pixels can be changed in various ways, and is not limited to this. Figure 3 and Figure 4 As shown in the diagram.

[0081] 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 various shapes such as circular shapes or oval shapes.

[0082] exist Figure 3 The diagram illustrates configuring a pixel by aggregating a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3, but is not limited to this. As an example, a pixel may be configured by aggregating one or more first sub-pixels SP1, one or more second sub-pixels SP2, and one or more third sub-pixels SP3. As an example, one or more white sub-pixels or one or more sub-pixels emitting other colors of light (e.g., cyan, magenta, or yellow) may be additionally or alternatively included in a pixel, but is not limited to this.

[0083] The driving transistor 120, the switching transistor, and the light-emitting diode 130 can be disposed above the substrate 111.

[0084] For example, substrate 111 may include a first substrate, a second substrate, and an interlayer insulating film. The interlayer insulating film may be disposed between the first substrate and the second substrate. As described above, substrate 111 is composed of a first substrate, a second substrate, and an interlayer insulating film to suppress moisture penetration. For example, the first substrate and the second substrate may be polyimide (PI) substrates, but are not limited thereto. As an example, substrate 111 may include a single substrate or even three or more substrates. As an example, substrate 111 may include a rigid substrate or a flexible substrate, but are not limited thereto. As an example, substrate 111 may include a transparent substrate or an opaque substrate, but are not limited thereto.

[0085] Multiple transistors, such as driving transistor 120 and switching transistor, can be disposed above substrate 111.

[0086] The driving transistor 120 can be composed of an active layer 124, a gate 121, a source 122, and a drain 123.

[0087] The buffer layer 112 may be disposed on the substrate 111. As an example, the buffer layer 112 may be omitted depending on the design.

[0088] The active layer 124 can be set on the buffer layer 112.

[0089] The gate insulating layer 113 is disposed on the active layer 124.

[0090] The gate 121 can be disposed on the gate insulating layer 113.

[0091] An interlayer insulating layer 114 may be disposed on the gate 121.

[0092] The source 122 and drain 123 of the driving transistor 120 can be disposed on the interlayer insulating layer 114.

[0093] At this time, for example, the source 122 and the drain 123 can be electrically connected to a portion of the active layer 124 through contact holes provided in the interlayer insulating layer 114 and the gate insulating layer 113, but are not limited thereto.

[0094] The protective layer 115 can be disposed on the source 122 and the drain 123.

[0095] The planarization layer 116 can be disposed on the protective layer 115.

[0096] For example, planarization layer 116 may include a first planarization layer and a second planarization layer, but is not limited thereto. As an example, planarization layer 116 may include a single planarization layer or three or more planarization layers, but is not limited thereto.

[0097] The planarization layer 116 may be made of an organic material such as acrylic resin or epoxy resin, and may be made of, for example, light propylene (PAC), but is not limited thereto.

[0098] The anode 131 can be disposed on the planarization layer 116.

[0099] In a sub-pixel SP, the planarization layer 116 and the protective layer 115 include contact holes, and the drain 123 and anode 131 of the driving transistor 120 can be electrically connected through the contact holes.

[0100] The embankment 117 can be configured to cover part of the anode 131.

[0101] For example, the portion of the embankment 117 corresponding to the light-emitting region EA of the sub-pixel SP may be open. As an example, the embankment 117 may be provided while covering both ends of the anode 131, but is not limited thereto. As an example, the embankment 117 may contact the side surface of the anode 131 without covering the anode 131, but is not limited thereto.

[0102] For example, the embankment 117 may include an opening region OA obtained by removing (opening) a portion corresponding to the light-emitting region EA of the sub-pixel SP. Furthermore, for example, in a plan view, the opening region OA may have a rectangular shape, but is not limited thereto, and may have various shapes such as a circular shape or an oval shape.

[0103] For example, a portion of anode 131 can be exposed through the opening region OA.

[0104] Meanwhile, the light-emitting region EA can have a shape corresponding to the shape of the opening region OA. When the shape of any component corresponds to the shape of another component, it means that the arbitrary component has the same shape as the other component, or the same shape but different dimensions, or the shape of the arbitrary component is formed by transferring the shape of the other component using any method. Therefore, the shape of the light-emitting region EA is essentially understood as being obtained by transferring the shape of the opening region OA by light emitted from the organic layer 132 located in the opening region OA.

[0105] The embankment 117 can be formed of PI-based materials, but is not limited to this.

[0106] In this case, as an example, the side portion of the embankment 117 may have the same shape as the edge of the opening region OA2. As an example, the side portion of the embankment 117 may have a rectangular shape, which is substantially the same as the edge of the opening region OA2, but this disclosure is not limited thereto. For example, the side portion of the embankment 117 may have various shapes such as a circular shape or an oval shape.

[0107] For example, the organic layer 132 may be disposed in or near the opening region OA of the embankment 117. For example, the organic layer 132 may be disposed on the anode 131 exposed through the opening region OA of the embankment 117. For example, the organic layer 132 may be disposed in the opening region OA of the embankment 117.

[0108] The organic layer 132 may be provided only in the opening region OA, but this disclosure is not limited thereto, and a portion of the organic layer 132 may also be provided on the top surface and sides of the embankment 117.

[0109] The organic layer 132 can be configured as a single layer or a multilayer structure. The organic layer 132 may include at least one light-emitting layer (light-emitting material layer: EML). The light-emitting layer may include organic light-emitting materials, inorganic light-emitting materials, or mixed light-emitting materials. Furthermore, for example, the organic layer 132 may also include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), but is not limited thereto. Therefore, the luminous efficiency of the light-emitting layer can be improved.

[0110] A cathode 133 is disposed on an organic layer 132, and the cathode 133 may include a conductive material. A light-emitting diode 130 may be configured including an anode 131, an organic layer 132, and a cathode 133.

[0111] As an example, the cathode 133 may comprise a material different from that of the anode 131, or it may comprise the same material as that of the anode 131. As an example, the transmittance of the cathode 133 may be higher than that of the anode 131, but is not limited thereto. For example, the cathode 133 may be a transparent electrode formed of a transparent conductive material such as ITO and IZO, but is not limited thereto. Therefore, as an example, in a stereoscopic image display device according to an exemplary embodiment of the present disclosure, light generated by the light-emitting layer can be emitted through the cathode 133, but is not limited thereto. Furthermore, the work function of the cathode 133 may be lower than that of the anode 131, but is not limited thereto.

[0112] At this time, the image realized by the light emitted from the light-emitting diode 130 of each sub-pixel SP can include various colors. As an example, the light emitted from the light-emitting diode 130 of each sub-pixel SP can represent a different color than the light emitted from the light-emitting diode 130 of adjacent sub-pixel SPs, but is not limited thereto. For example, the light-emitting region EA of each sub-pixel SP can be one of a red light-emitting region emitting red light, a green light-emitting region emitting green light, and a blue light-emitting region emitting blue light. As an example, the light-emitting layer of the organic layer 132 of each sub-pixel SP can be separated from the light-emitting layers of adjacent sub-pixel SPs, but is not limited thereto. For example, the light-emitting layer of each sub-pixel SP can be one of a red light-emitting layer producing red light, a green light-emitting layer producing green light, and a blue light-emitting layer producing blue light. As an example, the organic layer 132 of each sub-pixel SP can include a material different from the material of the organic layer 132 of adjacent sub-pixel SPs, but is not limited thereto. Furthermore, for example, the organic layer 132 of each sub-pixel SP can include a stacked structure different from the stacked structure of the organic layer 132 of adjacent sub-pixel SPs, but is not limited thereto. As an example, the organic layer 132 of each sub-pixel SP may include an end located on the embankment 117, but is not limited thereto. As an example, the light-emitting layer of the organic layer 132 of each sub-pixel SP may be connected to the light-emitting layer of the adjacent sub-pixel SP. As an example, the light-emitting layer of each sub-pixel SP may be a white light-emitting layer that produces white light. As an example, the organic layer 132 may have a common layer (e.g., a hole injection layer HIL, a hole transport layer HTL, an electron transport layer ETL, or an electron injection layer EIL) extending continuously on the top surface of the embankment 117, but is not limited thereto.

[0113] The encapsulation layer 140 can be disposed above the light-emitting diode 130.

[0114] The encapsulation layer 140 can suppress damage to the light-emitting diodes 130 disposed in each sub-pixel SP due to external impact and moisture.

[0115] At this time, as an example, the encapsulation layer 140 may have a single-layer structure or a multi-layer structure, but is not limited thereto. For example, the encapsulation layer 140 may include a first encapsulation layer 141, a second encapsulation layer 142, and a third encapsulation layer 143 stacked sequentially. The first encapsulation layer 141, the second encapsulation layer 142, and the third encapsulation layer 143 may include insulating materials. As an example, the second encapsulation layer 142 may include materials different from those of the first encapsulation layer 141 and the third encapsulation layer 143, but is not limited thereto. For example, the first encapsulation layer 141 and the third encapsulation layer 143 may include inorganic insulating materials, and the second encapsulation layer 142 may include organic insulating materials. Therefore, in the stereoscopic image display device according to the exemplary embodiment of the present disclosure, damage to the light-emitting diode 130 due to external impact and moisture can be effectively suppressed. The second encapsulation layer 142 can eliminate the steps caused by the light-emitting diode 130 of each sub-pixel SP. As an example, the thickness of the second encapsulation layer 142 may be greater than the thickness of the first encapsulation layer 141 and the third encapsulation layer 143, but is not limited thereto. For example, the top surface of the encapsulation layer 140 opposite to the substrate 111 can be a flat plane. The top surface of the encapsulation layer 140 can be parallel to the top surface of the substrate 111.

[0116] As an example, color filters CF_R, CF_G, and CF_B can be set above encapsulation layer 140.

[0117] Each color filter CF_R, CF_G, and CF_B can overlap with the light-emitting region EA of each sub-pixel SP. For example, color filters CF_R, CF_G, and CF_B can include a red color filter CF_R overlapping with a red light-emitting region, a green color filter CF_G overlapping with a green light-emitting region, and a blue color filter CF_B overlapping with a blue light-emitting region. The light generated by the light-emitting diode 130 of each sub-pixel SP can be emitted to the outside through the color filters CF_R, CF_G, and CF_B of the corresponding sub-pixel SP. Therefore, in the stereoscopic image display device according to an exemplary embodiment of the present disclosure, color reproduction can be improved.

[0118] The dimensions of the color filters CF_R, CF_G, and CF_B in each sub-pixel SP can be larger than the light-emitting region EA of the corresponding sub-pixel SP. For example, the color filters CF_R, CF_G, and CF_B in each sub-pixel SP may include regions located outside the light-emitting region EA defined in the corresponding sub-pixel SP. In this case, the region located between adjacent light-emitting regions EA can be defined as a non-light-emitting region. For example, the ends of the color filters CF_R, CF_G, and CF_B located on each sub-pixel SP may overlap with the non-light-emitting region. Therefore, in the stereoscopic image display apparatus according to an exemplary embodiment of the present disclosure, the amount of light emitted to the outside through the color filters CF_R, CF_G, and CF_B of each sub-pixel SP can be increased. Therefore, light extraction efficiency can be improved.

[0119] A barrier layer BM can be disposed above a non-light-emitting area of ​​the encapsulation layer 140. For example, the barrier layer BM can overlap with the embankment 117. For example, the barrier layer BM can be configured to be parallel to the color filters CF_R, CF_G, and CF_B. As an example, the barrier layer BM can be disposed in the same plane as the color filters CF_R, CF_G, and CF_B. Furthermore, for example, the color filters CF_R, CF_G, and CF_B, as well as the barrier layer BM, can be in direct contact with the third encapsulation layer 143. The end of each color filter CF_R, CF_G, and CF_B can partially overlap with the barrier layer BM. For example, the barrier layer BM can include a region located between the third encapsulation layer 143 and the end of each color filter CF_R, CF_G, and CF_B.

[0120] The blocking layer BM may include a light-blocking material. For example, the blocking layer BM may include a black dye such as carbon black, but is not limited thereto. Therefore, in the stereoscopic image display apparatus according to an exemplary embodiment of the present disclosure, light emitted from the light-emitting diode 130 of each sub-pixel SP to the color filters CF_R, CF_G, and CF_B of adjacent sub-pixels SP can be blocked by the blocking layer BM. Therefore, in the stereoscopic image display apparatus according to an exemplary embodiment of the present disclosure, light leakage caused by light emission that does not pass through the color filters CF_R, CF_G, and CF_B of each sub-pixel SP can be suppressed. Furthermore, in the stereoscopic image display apparatus according to an exemplary embodiment of the present disclosure, unwanted light mixing can be suppressed.

[0121] A first insulating layer 118 may be disposed above the color filters CF_R, CF_G, and CF_B and the barrier layer BM. The first insulating layer 118 suppresses damage to the color filters CF_R, CF_G, and CF_B and the barrier layer BM caused by external moisture and impact.

[0122] For example, the first insulating layer 118 may be made of an insulating material. Furthermore, the first insulating layer 118 may be made of a transparent insulating material. For example, the first insulating layer 118 may include inorganic and / or organic insulating materials. The first insulating layer 118 can eliminate the steps caused by the color filters CF_R, CF_G, and CF_B and the barrier layer BM. For example, the top surface of the first insulating layer 118 opposite to the encapsulation layer 140 may be flat. The top surface of the first insulating layer 118 may be parallel to the top surface of the encapsulation layer 140.

[0123] Optical component 160 may be disposed on the first insulating layer 118.

[0124] The optical component 160 may include a high-refractive-index layer 165 and a low-refractive-index layer 166.

[0125] Optical components 160 can be configured by repeatedly placing multiple high-refractive-index layers 165 and multiple low-refractive-index layers 166.

[0126] As an example, the high-refractive-index layer 165 can have a trapezoidal shape, but is not limited to this.

[0127] For example, in the high-refractive-index layer 165, the upper side can be longer than the lower side. In this case, the upper side can refer to the side facing the optical lens 150, and the lower side can refer to the side facing the substrate 111.

[0128] The high-refractive-index layer 165 of the exemplary embodiment of this disclosure may have an isosceles trapezoidal shape with two equal base angles on the upper side.

[0129] Multiple high-refractive-index layers 165 may be arranged parallel to the top surface of the first insulating layer 118. The multiple high-refractive-index layers 165 may extend parallel to each other in one direction. For example, in a stereoscopic image display device according to an exemplary embodiment of the present disclosure, sub-pixels SP1, SP2, and SP3 (SP) are arranged parallel to each other in a first direction X and a second direction Y perpendicular to the first direction X. Each high-refractive-index layer 165 extends in a direction inclined relative to the first direction X and the second direction Y (see...). Figure 3 ).

[0130] A low-refractive-index layer 166 may be disposed between multiple high-refractive-index layers 165. As an example, the low-refractive-index layer 166 may be disposed horizontally between multiple high-refractive-index layers 165. As an example, the low-refractive-index layer 166 and the high-refractive-index layer 165 may be disposed in the same plane, but are not limited thereto. As an example, the low-refractive-index layer 166 and the high-refractive-index layer 165 may have the same thickness, but are not limited thereto. As an example, the interface between the low-refractive-index layer 166 and the high-refractive-index layer 165 may extend from the bottom surface of the optical component 160 to the top surface of the optical component 160, but are not limited thereto. As an example, the low-refractive-index layer 166 may have a triangular or trapezoidal shape, but is not limited thereto.

[0131] Multiple low-refractive-index layers 166 may be arranged parallel to the top surface of the first insulating layer 118. The multiple low-refractive-index layers 166 may extend parallel to each other in one direction. For example, each low-refractive-index layer 166 may extend in a direction inclined relative to a first direction X and a second direction Y.

[0132] The high-refractive-index layer 165 and the low-refractive-index layer 166 are made of insulating material, and the high-refractive-index layer 165 may be made of an insulating material with a refractive index higher than that of the low-refractive-index layer 166. Furthermore, the high-refractive-index layer 165 and the low-refractive-index layer 166 may be made of transparent insulating material.

[0133] The vertex of the upper side of the high-refractive-index layer 165 may correspond to the boundary of the sub-pixel SP, but is not limited thereto. As an example, the vertex of the upper side of the high-refractive-index layer 165 may overlap with the sub-pixel SP, but is not limited thereto.

[0134] The second insulating layer 119 may be disposed on the high-refractive-index layer 165 and the low-refractive-index layer 166. For example, the second insulating layer 119 may be made of an insulating material. The second insulating layer 119 may be made of a transparent insulating material. For example, the second insulating layer 119 may include inorganic insulating materials and / or organic insulating materials.

[0135] The first insulating layer 118 and the second insulating layer 119 can sufficiently ensure the optical distance of light emitted from the light-emitting diode 130 of each sub-pixel SP. For example, the thickness of the first insulating layer 118 and the second insulating layer 119 can be greater than the thickness of at least one insulating layer 112, 113, 114, 115, 116, and 117 disposed between the substrate 111 and the encapsulation layer 140. The top surface of the second insulating layer 119 opposite to the first insulating layer 118 can be flat. For example, the top surface of the second insulating layer 119 can be parallel to the top surface of the first insulating layer 118.

[0136] The second insulating layer 119 can eliminate the step caused by the optical component 160. For example, the refractive index of the second insulating layer 119 can be the same as that of the first insulating layer 118, but is not limited thereto. As an example, the material of the second insulating layer 119 can be the same as that of the first insulating layer 118, but is not limited thereto. As an example, at least one of the first insulating layer 118 and the second insulating layer 119 can be omitted depending on the design, but is not limited thereto.

[0137] Optical lenses 150 may be disposed on the second insulating layer 119. Optical lenses 150 may be disposed parallel to the top surface of the second insulating layer 119. Optical lenses 150 may extend in one direction while remaining parallel to each other. For example, in a stereoscopic image display device according to an exemplary embodiment of the present disclosure, sub-pixels SP are arranged parallel to a first direction X and a second direction Y perpendicular to the first direction X. Each optical lens 150 may extend in a direction inclined relative to the first direction X and the second direction Y. As an example, each optical lens 150 may extend parallel to the high-refractive layer 165, but is not limited thereto. As an example, each optical lens 150 may extend in the same inclined direction as the corresponding high-refractive layer 165, but is not limited thereto.

[0138] Users can perceive in three dimensions the image created by light emitted from the light-emitting diodes 130 of each sub-pixel SP through the optical lens 150. The optical lens 150 may be a biconvex lens. For example, a stereoscopic image display device of an exemplary embodiment of this disclosure may be a light field display device (LFD) that uses the optical lens 150 to provide a stereoscopic image to the user in a light field manner.

[0139] For example, each optical lens 150 may overlap with multiple sub-pixels SP in the first direction X. The optical lens 150 may be formed by a reflow process, but is not limited thereto.

[0140] For example, five sub-pixels SP arranged in the same row along the first direction X may overlap with one of the plurality of optical lenses 150, but this disclosure is not limited thereto. In this case, the size of an optical lens 150 located above the five sub-pixels SP may be larger than the total size of the five light-emitting regions EA disposed in the five sub-pixels SP. As an example, an optical lens 150 may overlap entirely with each of the five sub-pixels SP arranged in the same row along the first direction X, or it may overlap entirely with each of the four sub-pixels SP arranged in the same row along the first direction X, while also overlapping a portion of each of the two sub-pixels SP arranged outside these four sub-pixels SP along the first direction X, but is not limited thereto.

[0141] As described above, according to an exemplary embodiment of this disclosure, light incident from the bottom of the light-emitting diode 130 is significantly refracted at the interface between the low-refractive-index layer 166 and the high-refractive-index layer 165 of the optical component 160, thereby altering the path of the light, which will refer to Figure 5 Provide a detailed description.

[0142] Figure 5 It is shown Figure 1 The FoV view of a stereoscopic image display device.

[0143] Figure 6 This is a view showing the FoV according to a comparative embodiment.

[0144] Figure 6 The cross-sectional structure of the display panel according to the comparative embodiment, and the light propagation path, are shown, in which the optical components between the optical lens 150 and the color filters CF_R, CF_G and CF_B are omitted, and the configuration below the encapsulation layer 140 is omitted for ease of description.

[0145] Figure 5 It is shown Figure 4 The diagram shows a cross-sectional view of the display panel 110 and the light propagation path, with the configuration below the encapsulation layer 140 omitted for ease of description.

[0146] First, refer to Figure 5 Color filters CF_R, CF_G, and CF_B can be set above the encapsulation layer 140.

[0147] The light generated by the light-emitting diode of each sub-pixel can be emitted to the outside through the color filters CF_R, CF_G and CF_B of the corresponding sub-pixel.

[0148] The first insulating layer 118 can be disposed above the color filters CF_R, CF_G and CF_B.

[0149] For example, the refractive index of the first insulating layer 118 can be 1.5 ± 10%.

[0150] Multiple high-refractive-index layers 165 may be disposed on the first insulating layer 118.

[0151] For example, the high-refractive-index layer 165 has an inverted trapezoidal shape in which the upper side is longer than the lower side.

[0152] The high-refractive-index layer 165 of the exemplary embodiment of this disclosure may have an isosceles trapezoidal shape with two base angles α of equal upper side.

[0153] At this point, for example, considering errors and process allowances, the bottom angle α of the upper side of the high refractive layer 165 can be 55±10%.

[0154] Furthermore, as an example, the length of the upper side of the high-refractive layer 165 may be equal to the pitch P of the optical lens 150, but is not limited thereto.

[0155] The low-refractive-index layer 166 can be disposed between multiple high-refractive-index layers 165.

[0156] For example, the high-refractive-index layer 165 can be made of an insulating material with a refractive index higher than that of the low-refractive-index layer 166.

[0157] For example, considering errors and process allowances, the refractive index of the high-refractive layer 165 can be 1.64 ± 10%, and the refractive index of the low-refractive layer 166 can be 1.40 ± 10%. In this case, the refractive index difference between the high-refractive layer 165 and the low-refractive layer 166 can be about 0.23 to 0.25, and is expected to be 0.24.

[0158] For example, the high-refractive-index layer 165 may be composed of a UV-curable photopolymer with a refractive index of 1.64 ± 10%, and the low-refractive-index layer 166 may be composed of a UV-curable photopolymer with a refractive index of 1.40 ± 10%, but is not limited thereto.

[0159] The second insulating layer 119 can be disposed on the optical component 160.

[0160] For example, the refractive index of the second insulating layer 119 can be 1.5 ± 10%, but is not limited to this.

[0161] For example, the refractive index of the low-refractive layer 166 may be lower than that of the first insulating layer 118 and the second insulating layer 119. Furthermore, for example, the refractive index of the high-refractive layer 165 may be higher than that of the first insulating layer 118 and the second insulating layer 119.

[0162] For example, the second insulating layer 119 may be made of photopolymer acrylic with a refractive index of 1.5 ± 10%, but is not limited thereto. Furthermore, as an example, the second insulating layer 119 may be made of the material constituting the encapsulation layer 140, but is not limited thereto.

[0163] An optical lens 150 may be disposed on the second insulating layer 119.

[0164] The distance d1 between the optical component 160 and the color filters CF_R, CF_G, and CF_B (e.g., the thickness of the first insulating layer 118) can be substantially equal to the distance d2 between the optical component 160 and the optical lens 150 (e.g., the thickness of the second insulating layer 119). As described above, the optical component 160 can be disposed within the same distance between the color filters CF_R, CF_G, and CF_B and the optical lens 150.

[0165] In the stereoscopic image display device according to an exemplary embodiment of the present disclosure configured as described above, the light from the light-emitting diode is greatly refracted from the interface between the low-refractive layer 166 and the high-refractive layer 165 of the optical component 160, thereby changing the path of the light.

[0166] This is because the high-refractive-index layer 165 has an inverted trapezoidal shape in which the upper side is longer than the lower side, causing light from the light-emitting diode incident from the bottom to be greatly refracted at the interface between the low-refractive-index layer 166 and the high-refractive-index layer 165, thereby changing the path of the light (see...). Figure 5 (The arrow). Therefore, according to this disclosure, while maintaining the same resolution, the path of light is distributed over a wide range through the optical element 160, thereby ensuring a wider viewing angle.

[0167] Reference Figure 6 In a light field display (LFD) structure, a convex optical lens 150, such as a biconvex lens, is attached to the display panel.

[0168] When a lens is designed to produce a stereoscopic image, the field of view (FoV') is typically determined based on the pitch P and optical clearance d of the optical lens 150.

[0169] In this scenario, to expand the field of view (FoV'), the pitch P of the optical lens 150 is typically increased. However, as the pitch P increases, the horizontal resolution of the 3D image may decrease. This is because the horizontal size of a 3D pixel is determined by the pitch P of the optical lens 150. Therefore, if the pitch P of the optical lens 150 is extended to expand the field of view (FoV'), the horizontal resolution of the 3D image may decrease.

[0170] Refer again Figure 5 In this disclosure, an optical component 160, consisting of a low-refractive-index layer 166 and a high-refractive-index layer 165, is disposed between color filters CF_R, CF_G, and CF_B and an optical lens 150 to alter the path of light guided from the light-emitting diode to the optical lens 150 (e.g., to disperse the light). Therefore, an LFD with a wide field of view (FoV) is achieved while maintaining the same level of 3D horizontal resolution as the LFD of the comparative embodiment.

[0171] Reference Figure 5 and Figure 6 It should be understood that in the exemplary embodiments of this disclosure, the light from the light-emitting diode 130 is greatly refracted at the interface between the low-refractive layer 166 and the high-refractive layer 165 to enter the optical lens 150, thereby the field of view (FoV) is wider than that of the comparative embodiments.

[0172] According to this disclosure, a wider field of view is ensured while maintaining the same resolution, thereby improving the quality of images for user 3D recognition.

[0173] Furthermore, this disclosure ensures flexibility in lens design and enables highly immersive stereoscopic imaging, thereby enhancing competitiveness in various markets such as entertainment, education, and industrial applications.

[0174] Figure 7 It is a graph showing the brightness according to the viewing angle.

[0175] Figure 7 Together, we illustrate the brightness variation of light from a light source according to a brightness viewing angle and the brightness variation of light from a light source passing through the optical components of this disclosure in an exemplary embodiment according to a brightness viewing angle.

[0176] Reference Figure 7 It can be understood that light from a light source has a brightness value that decreases gradually from the middle toward -60 degrees or +60 degrees—but decreases slowly rather than abruptly.

[0177] Conversely, when the optical component of this disclosure is positioned above a light source, light from the light source is greatly refracted at the interface between the low-refractive layer and the high-refractive layer of the optical component, causing the light to concentrate in the viewing direction rather than in the middle portion. As an example, it can be understood that the brightness value decreases sharply in the middle portion of the region from -20 degrees to +15 degrees. As an example, according to this disclosure, light is reduced in the ±20 degree region, and the light is concentrated in the viewing direction.

[0178] Figure 8 It is a graph showing the brightness according to the viewing angle.

[0179] Figure 8 Together, we show the brightness variation according to the brightness viewing angle of a comparative embodiment in which light from a light source passes through an optical lens, and the brightness variation according to the brightness viewing angle of an exemplary embodiment in which light passes through the optical components and optical lenses of this disclosure.

[0180] Reference Figure 8 According to the exemplary embodiment, it can be understood that the angle at which light enhanced by the optical components in the viewing direction is incident on the optical lens used to realize the LFD is increased, thereby ultimately forming a wider field of view (FoV) than that of the comparative embodiment. For example, it can be understood that when the field of view (FoV) of the comparative embodiment is about 62°, the field of view (FoV) of the exemplary embodiment is increased to about 73°.

[0181] At the same time, this disclosure also applies when the interface between the low-refractive layer and the high-refractive layer of an optical component is not a straight line, which will be described in detail with reference to the accompanying drawings.

[0182] Figure 9 This is a cross-sectional view of a stereoscopic image display device according to another exemplary embodiment of the present disclosure.

[0183] Figure 10 This is a cross-sectional view of a stereoscopic image display device according to yet another exemplary embodiment of the present disclosure.

[0184] Besides the shape of the interface between the low-refractive layer and the high-refractive layer Figure 9 Another exemplary embodiment of this disclosure and Figure 10 Another exemplary embodiment of this disclosure and Figures 1 to 5 The exemplary embodiments of this disclosure are substantially the same. Therefore, redundant descriptions will be omitted or briefly given. The same configurations will be indicated by the same reference numerals. In the following description of the same reference numerals, refer to Figures 1 to 5 .

[0185] exist Figure 9 and Figure 10 For ease of description, the configuration below the encapsulation layer 140 is omitted.

[0186] First, refer to Figure 9 In another exemplary embodiment of the stereoscopic image display device disclosed herein, the optical component 260 may be disposed on the first insulating layer 118.

[0187] The optical component 260 may include a high-refractive-index layer 265 and a low-refractive-index layer 266.

[0188] For example, in the high-refractive-index layer 265, the upper side can be longer than the lower side.

[0189] The low-refractive-index layer 266 can be disposed between multiple high-refractive-index layers 265.

[0190] For example, the high-refractive-index layer 265 can be made of an insulating material with a refractive index higher than that of the low-refractive-index layer 266.

[0191] According to another exemplary embodiment of this disclosure, the interface between the low-refractive layer 266 and the high-refractive layer 265 of the optical component 260 is formed with a recessed shape. For example, the interface between the low-refractive layer 266 and the high-refractive layer 265 may have a recessed shape that curves toward the high-refractive layer 265. The recessed shape may be semi-circular or oval. As an example, as described above, the interface between the low-refractive layer 266 and the high-refractive layer 265 is shaped to be recessed toward the high-refractive layer 265, such that the light from the light-emitting diode is refracted to a greater extent at the interface between the low-refractive layer 266 and the high-refractive layer 265. Therefore, according to another exemplary embodiment of this disclosure, while maintaining the same resolution, the light path is distributed over a wider range through the optical component 260, thereby ensuring a significantly wider viewing angle.

[0192] Reference Figure 10In another exemplary embodiment of the stereoscopic image display device disclosed herein, the optical component 360 may be disposed on the first insulating layer 118.

[0193] The optical component 360 may include a high-refractive-index layer 365 and a low-refractive-index layer 366.

[0194] For example, in the high-refractive-index layer 365, the upper side can be longer than the lower side.

[0195] The low-refractive layer 366 can be disposed between multiple high-refractive layers 365.

[0196] For example, the high-refractive-index layer 365 can be made of an insulating material with a refractive index higher than that of the low-refractive-index layer 366.

[0197] According to another exemplary embodiment of this disclosure, a plurality of stepped shapes are formed at the interface between the low-refractive layer 366 and the high-refractive layer 365 of the optical component 360. As described above, because the interface between the low-refractive layer 366 and the high-refractive layer 365 has a plurality of stepped shapes, the light from the light-emitting diode is refracted from the interface between the low-refractive layer 366 and the high-refractive layer 365 in a more diverse range of directions. Therefore, according to another exemplary embodiment of this disclosure, while maintaining the same resolution, the light path is distributed over a wider range through the optical component 360, thereby ensuring a significantly wider viewing angle.

[0198] Exemplary embodiments of this disclosure can also be described as follows:

[0199] According to one aspect of this disclosure, a stereoscopic image display device is provided. The stereoscopic image display device includes: a substrate divided into a plurality of sub-pixels; a light-emitting diode (LED) disposed above the substrate; a color filter disposed above and overlapping the LED; an optical component disposed above the color filter and including a plurality of high-refractive-index layers and a plurality of low-refractive-index layers alternately arranged in a horizontal direction, each high-refractive-index layer having an upper side longer than its lower side; and an optical lens disposed above the optical component.

[0200] At least a portion of each of the multiple low-refractive layers can be inserted between the high-refractive layer and the color filter.

[0201] High-refractive-index layers can have an inverted trapezoidal shape.

[0202] High-refractive-index layers can have an isosceles trapezoidal shape.

[0203] The low-refractive-index layer and the high-refractive-index layer can be placed in the same plane and have the same thickness.

[0204] The low-refractive layer can have a triangular or trapezoidal shape, and its two sides can be in contact with the high-refractive layer.

[0205] Multiple high-refractive-index layers may extend parallel to each other in one direction, and multiple low-refractive-index layers may extend parallel to each other in said one direction.

[0206] The subpixels can be arranged along a first direction and a second direction perpendicular to the first direction, and the high-refractive-index layer and the low-refractive-index layer can extend along one of the directions that is inclined relative to the first direction and the second direction.

[0207] The high-refractive-index layer can be made of an insulating material with a higher refractive index than the low-refractive-index layer.

[0208] The high-refractive-index layer and the low-refractive-index layer can be made of transparent insulating materials.

[0209] The vertices of the upper side of the high-refractive layer can correspond to the boundary of a sub-pixel or overlap with a sub-pixel.

[0210] The stereoscopic image display device may further include: a first insulating layer disposed between the color filter and the optical component; and a second insulating layer disposed on the optical component.

[0211] The refractive index of the low-refractive layer can be lower than that of the first and second insulating layers, and the refractive index of the high-refractive layer can be higher than that of the first and second insulating layers.

[0212] Optical lenses can extend parallel to each other in one direction and can be tilted relative to the first and second directions.

[0213] Optical lenses can extend parallel to both the high-refractive-index layer and the low-refractive-index layer.

[0214] Among a plurality of sub-pixels arranged along a first direction and a second direction perpendicular to the first direction, at least two sub-pixels arranged in a row along the first direction may overlap with one of the plurality of optical lenses.

[0215] The length of the upper side of the high-refractive layer can be equal to the pitch of the optical lens.

[0216] The upper edge of the high-refractive layer can overlap with the optical lens.

[0217] The optical components can be positioned between the color filter and the optical lens at equal distances relative to the color filter and the optical lens.

[0218] The interface between the high-refractive-index layer and the low-refractive-index layer can have a concave shape that bends toward the high-refractive-index layer.

[0219] The concave shape can be semi-circular or oval.

[0220] The interface between the high-refractive-index layer and the low-refractive-index layer can have multiple stepped shapes.

[0221] The refractive index difference between the high-refractive-index layer and the low-refractive-index layer can be 0.23 to 0.25.

[0222] According to another aspect of this disclosure, a stereoscopic image display device is provided. The stereoscopic image display device includes: a substrate divided into a plurality of sub-pixels; a light-emitting diode (LED) disposed above the substrate; a color filter disposed above the LED; an optical component above the color filter, wherein a plurality of high-refractive-index layers and a plurality of low-refractive-index layers are alternately disposed in a horizontal direction; and an optical lens disposed above the optical component, wherein light from the LED can be refracted at an angle greater than the angle of incidence relative to the optical component at the interface between the low-refractive-index layers and the high-refractive-index layers, so as to be incident on the optical lens.

[0223] High-refractive-index layers can have an inverted trapezoidal shape where the upper side is longer than the lower side.

[0224] The interface between the high-refractive-index layer and the low-refractive-index layer can have a concave shape that bends toward the high-refractive-index layer.

[0225] The concave shape can be semi-circular or oval.

[0226] The interface between the high-refractive-index layer and the low-refractive-index layer can have multiple stepped shapes.

[0227] According to another aspect of this disclosure, a stereoscopic image display device is provided. The stereoscopic image display device may include: a substrate divided into a plurality of sub-pixels; a light-emitting diode (LED) disposed above the substrate; a color filter disposed above the LED; an optical component disposed above the color filter; and an optical lens disposed above the optical component, wherein light from the LED is refracted by the optical component at an angle greater than the angle of incidence relative to the optical component, and thus incident on the optical lens.

[0228] The optical components can be positioned between the color filter and the optical lens at equal distances relative to the color filter and the optical lens.

[0229] Light from a light-emitting diode can be refracted at the interface between the first and second refractive layers in an optical component, and the interface can extend obliquely from the bottom surface of the optical component to the top surface of the optical component.

[0230] Although 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 illustrative 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.

[0231] Cross-reference to related applications

[0232] This application claims priority and benefit to Korean Patent Application No. 10-2024-0192782, filed on December 20, 2024, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety for all purposes, as if fully set forth herein.

Claims

1. A stereoscopic image display device, the stereoscopic image display device comprising: A substrate, the substrate being divided into multiple sub-pixels; A light-emitting diode, wherein the light-emitting diode is disposed above the substrate; A color filter, wherein the color filter is disposed above and overlaps with the light-emitting diode; An optical component disposed above the color filter and comprising a plurality of high-refractive-index layers and a plurality of low-refractive-index layers alternately arranged in a horizontal direction, wherein the upper side of each high-refractive-index layer is longer than its lower side. as well as An optical lens is disposed above the optical component.

2. The stereoscopic image display apparatus according to claim 1, wherein At least a portion of each of the plurality of low-refractive layers is inserted between the high-refractive layer and the color filter.

3. The stereoscopic image display apparatus according to claim 1, wherein The high-refractive-index layer has an inverted trapezoidal shape, and the low-refractive-index layer has a triangular or trapezoidal shape.

4. The stereoscopic image display apparatus according to claim 1, wherein The low-refractive layer and the high-refractive layer are disposed in the same plane and have the same thickness. The plurality of high-refractive-index layers extend parallel to each other along one direction, and the plurality of low-refractive-index layers extend parallel to each other along the same direction.

5. The stereoscopic image display apparatus according to claim 4, wherein The sub-pixels are arranged along a first direction and a second direction perpendicular to the first direction, and the high-refractive-index layer and the low-refractive-index layer extend along one of the directions inclined relative to the first direction and the second direction.

6. The stereoscopic image display apparatus according to claim 1, wherein The high-refractive-index layer is composed of an insulating material with a refractive index higher than that of the low-refractive-index layer, and The high-refractive-index layer and the low-refractive-index layer are made of transparent insulating material.

7. The stereoscopic image display apparatus according to claim 1, wherein The vertex of the upper side of the high-refractive layer corresponds to the boundary of the sub-pixel or overlaps with the sub-pixel.

8. The stereoscopic image display device according to claim 1, further comprising: A first insulating layer is disposed between the color filter and the optical component; as well as A second insulating layer is disposed on the optical component. Wherein, the refractive index of the low-refractive layer is lower than that of the first insulating layer and the second insulating layer, and The refractive index of the high-refractive-index layer is higher than that of the first insulating layer and the second insulating layer.

9. The stereoscopic image display apparatus according to claim 5, wherein The optical lenses extend parallel to each other in one direction and are tilted relative to the first direction and the second direction.

10. The stereoscopic image display apparatus according to claim 5, wherein The optical lens extends parallel to the high-refractive-index layer and the low-refractive-index layer.

11. The stereoscopic image display apparatus according to claim 1, wherein Among the plurality of sub-pixels arranged along a first direction and a second direction perpendicular to the first direction, at least two sub-pixels arranged in a row along the first direction overlap with one of the plurality of optical lenses.

12. The stereoscopic image display apparatus according to claim 1, wherein The length of the upper side of the high-refractive layer is equal to the pitch of the optical lens, and The upper side of the high-refractive layer overlaps with the optical lens.

13. The stereoscopic image display apparatus according to claim 1, wherein The optical component is positioned between the color filter and the optical lens at an equal distance relative to the color filter and the optical lens.

14. The stereoscopic image display apparatus according to claim 1, wherein The interface between the high-refractive-index layer and the low-refractive-index layer has a concave shape that bends toward the high-refractive-index layer, and The recessed shape is either semi-circular or oval.

15. The stereoscopic image display apparatus according to claim 1, wherein The interface between the high-refractive layer and the low-refractive layer has multiple stepped shapes.

16. The stereoscopic image display apparatus according to claim 1, wherein The refractive index difference between the high-refractive layer and the low-refractive layer is 0.23 to 0.

25.

17. A stereoscopic image display device, the stereoscopic image display device comprising: A substrate, the substrate being divided into multiple sub-pixels; A light-emitting diode, wherein the light-emitting diode is disposed above the substrate; A color filter, wherein the color filter is disposed above the light-emitting diode; An optical component, located above the color filter, wherein a plurality of high-refractive-index layers and a plurality of low-refractive-index layers are alternately arranged in the horizontal direction; as well as An optical lens is disposed above the optical component. The light from the light-emitting diode is refracted at an angle greater than the angle of incidence relative to the optical component at the interface between the low-refractive layer and the high-refractive layer, so as to be incident on the optical lens.

18. A stereoscopic image display device, the stereoscopic image display device comprising: A substrate, the substrate being divided into multiple sub-pixels; A light-emitting diode, wherein the light-emitting diode is disposed above the substrate; A color filter, wherein the color filter is disposed above the light-emitting diode; An optical component, the optical component being disposed above the color filter; as well as An optical lens is disposed above the optical component. Light from the light-emitting diode is refracted by the optical component at an angle greater than the angle of incidence relative to the optical component, so as to be incident on the optical lens.

19. The stereoscopic image display device according to claim 18, wherein, The optical component is positioned between the color filter and the optical lens at an equal distance relative to the color filter and the optical lens.

20. The stereoscopic image display device according to claim 18, wherein, The light from the light-emitting diode is refracted at the interface between the first and second refractive layers in the optical component. The interface extends obliquely from the bottom surface of the optical component to the top surface of the optical component.

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