Reflective structure, array of reflective structures comprising the same, and floating image display device

Abstract

A reflective structure includes a substrate including a first surface and a second surface opposite each other, a reflective pillar disposed on the substrate, and a first light blocking layer covering the first surface of the substrate, wherein the first light blocking layer includes an opening exposing the first surface of the substrate, and the reflective pillar and the opening are arranged along a second direction parallel to the first surface of the substrate, as viewed from a first direction perpendicular to the first surface of the substrate.

Description

Technical Field

[0001] This disclosure relates to reflective structures, reflective structure arrays, and floating image display devices. Background Technology

[0002] With the increasing demand in the augmented reality (AR) and virtual reality (VR) markets, and growing interest in public health, there is a growing need for semi-hollow displays as electronic devices capable of contactless interaction.

[0003] Unlike conventional mirrors, light incident from the original image (or object) passes through a dihedral reflector array (DCRA) device and is collected again on opposite sides of the DCRA. The DCRA can generate a floating image (half-image) by forming an image at a position that is exactly equidistant from the original image and the DCRA. Summary of the Invention

[0004] Technical issues

[0005] The technical objective of this disclosure is to provide a reflective structure, a reflective structure array, and a floating image display device with high light extraction efficiency.

[0006] The technical objective of this disclosure is to provide a reflective structure, a reflective structure array, and a floating image display device that do not generate ghost images.

[0007] The technical objective of this disclosure is to provide a reflective structure array and a floating image display device that prevent direct image generation.

[0008] However, the technical objectives of this disclosure are not limited to the above.

[0009] Technical solution

[0010] In one aspect, a reflective structure may be provided, comprising: a substrate including a first surface and a second surface opposite to each other; a reflective pillar disposed on the substrate; and a first light-blocking layer covering the first surface of the substrate, wherein the first light-blocking layer may include an opening exposing the first surface of the substrate, and the reflective pillar and the opening may be arranged in a second direction parallel to the first surface of the substrate relative to a first direction perpendicular to the first surface of the substrate.

[0011] The side surface of the reflective column may include: a first reflective side surface; a second reflective side surface perpendicular to the first reflective side surface; and a front surface disposed between the first reflective side surface and the second reflective side surface.

[0012] The front surface may have a planar shape, and the reflective column may have a triangular prism shape.

[0013] The front surface may have a curved shape, and the reflective column may have the same shape as a portion of a cylinder.

[0014] The reflective post may be disposed on the first surface, and the opening may be disposed next to the front surface.

[0015] The reflective structure may further include a second light-blocking layer disposed on the top surface, the first reflective side surface, and the second reflective side surface of the reflective column.

[0016] The reflective structure may further include a third light-blocking layer disposed on the top surface of the reflective column.

[0017] The reflective structure may further include a fourth light-blocking layer disposed between the reflective pillar and the substrate.

[0018] The reflective pillar can be disposed on the second surface of the substrate.

[0019] The aspect ratio of the reflective column can be greater than or equal to 0.6 and less than or equal to 3.5, and the aspect ratio of the reflective column can be determined by the following equation:

[0020] Aspect ratio = (height of the reflective column) / (width of the first reflective side surface).

[0021] In one aspect, a reflective structure array may be provided, comprising: a substrate; a plurality of reflective pillars disposed on the substrate; and a first light-blocking layer covering a first surface of the substrate, wherein the first light-blocking layer may include the plurality of first openings exposing the first surface, and the plurality of reflective pillars and the plurality of first openings adjacent to each other may be arranged in a second direction parallel to the first surface of the substrate, relative to a first direction perpendicular to the first surface of the substrate.

[0022] The distance between the plurality of reflective columns can be equal to or less than twice the height of the plurality of reflective columns.

[0023] Each of the plurality of reflective pillars may include: a first reflective side surface; a second reflective side surface perpendicular to the first reflective side surface; and a front surface disposed between the first reflective side surface and the second reflective side surface, wherein the distance between the front surfaces of the plurality of reflective pillars may be equal to or greater than 0.3 times the height of the plurality of reflective pillars.

[0024] The plurality of reflective pillars may include a plurality of first reflective groups arranged in the second direction, each of the plurality of first reflective groups including a plurality of first reflective pillars, the plurality of first reflective pillars being arranged in a third direction parallel to the first surface and intersecting the second direction.

[0025] The plurality of reflective columns may further include a plurality of second reflective groups arranged alternately with the plurality of first reflective groups in a second direction. Each of the plurality of second reflective groups includes a plurality of second reflective columns arranged in a third direction, and when viewed from the second direction, the plurality of second reflective columns may be arranged between the plurality of first reflective columns.

[0026] The plurality of reflective columns can be arranged radially.

[0027] The plurality of reflective pillars may be disposed on the first surface.

[0028] The plurality of reflective pillars may be disposed on a second surface of the substrate opposite to the first surface of the substrate.

[0029] In one aspect, a floating image display device may be provided, comprising: a real image element configured to output light for generating a real image; and a reflective structure array configured to generate a floating image by reflecting light provided from the real image element, wherein the reflective structure array may include: a substrate; a plurality of reflective pillars disposed on the substrate; and a first light-blocking layer covering a first surface of the substrate, the first light-blocking layer including a plurality of first openings exposing the first surface, and the plurality of reflective pillars and the plurality of first openings being arranged in a second direction parallel to the first surface relative to a first direction perpendicular to the first surface.

[0030] Each of the plurality of reflective pillars may include the following side surface: a first reflective side surface; a second reflective side surface perpendicular to the first reflective side surface; and a front surface disposed between the first reflective side surface and the second reflective side surface.

[0031] Best practice

[0032] In one aspect, a reflective structure may be provided, comprising: a substrate including a first surface and a second surface opposite to each other; a reflective pillar disposed on the substrate; and a first light-blocking layer covering the first surface of the substrate, wherein the first light-blocking layer may include an opening exposing the first surface of the substrate, and the reflective pillar and the opening may be arranged in a second direction parallel to the first surface of the substrate relative to a first direction perpendicular to the first surface of the substrate.

[0033] In one aspect, a reflective structure array may be provided, comprising: a substrate; a plurality of reflective pillars disposed on the substrate; and a first light-blocking layer covering a first surface of the substrate, wherein the first light-blocking layer may include a plurality of first openings exposing the first surface, and the plurality of reflective pillars and the plurality of first openings adjacent to each other may be arranged in a second direction parallel to the first surface of the substrate relative to a first direction perpendicular to the first surface of the substrate.

[0034] In one aspect, a floating image display device may be provided, comprising: a real image element configured to output light for generating a real image; and a reflective structure array configured to generate a floating image by reflecting light provided from the real image element, wherein the reflective structure array may include: a substrate; a plurality of reflective pillars disposed on the substrate; and a first light-blocking layer covering a first surface of the substrate, the first light-blocking layer including a plurality of first openings exposing the first surface, and the plurality of reflective pillars and the plurality of first openings being arranged in a second direction parallel to the first surface relative to a first direction perpendicular to the first surface.

[0035] Beneficial effects

[0036] This disclosure provides a reflective structure, a reflective structure array, and a floating image display device with high light extraction efficiency.

[0037] This disclosure provides a reflective structure, a reflective structure array, and a floating image display device that do not generate ghost images.

[0038] This disclosure provides a reflective structure, a reflective structure array, and a floating image display device for preventing the generation of direct images.

[0039] However, the effects of this disclosure are not limited to those described above. Attached Figure Description

[0040] Figure 1 This is a perspective view of the reflective structure according to an example embodiment.

[0041] Figure 2 yes Figure 1 A plan view of the reflective structure.

[0042] Figure 3 yes Figure 1 A side view of the reflective structure.

[0043] Figure 4 It is used to describe incident on Figure 1 A diagram illustrating the path of light through the reflective structure.

[0044] Figure 5 yes Figure 4 A side view of the reflective structure.

[0045] Figure 6 This is a perspective view of the reflective structure according to an example embodiment.

[0046] Figure 7 yes Figure 6 A plan view of the reflective structure.

[0047] Figure 8 yes Figure 6 A side view of the reflective structure.

[0048] Figure 9 It is used to describe incident on Figure 6 A diagram illustrating the path of light through the reflective structure.

[0049] Figure 10 yes Figure 9 A side view of the reflective structure.

[0050] Figure 11 This is a perspective view of the reflective structure according to an example embodiment.

[0051] Figure 12 yes Figure 11 A side view of the reflective structure.

[0052] Figure 13 This is a perspective view of the reflective structure according to an example embodiment.

[0053] Figure 14 yes Figure 13 A plan view of the reflective structure.

[0054] Figure 15 yes Figure 13 A side view of the reflective structure.

[0055] Figure 16 This is a perspective view of the reflective structure according to an example embodiment.

[0056] Figure 17 yes Figure 16 A bottom view of the reflective structure.

[0057] Figure 18 yes Figure 16 A side view of the reflective structure.

[0058] Figure 19 This is a perspective view of the reflective structure according to an example embodiment.

[0059] Figure 20 yes Figure 19 A plan view of the reflective structure.

[0060] Figure 21 This is a diagram showing the overall shape of the reflective structure array according to an exemplary embodiment.

[0061] Figure 22 yes Figure 21 A plan view of the reflective structure.

[0062] Figure 23 This is a diagram showing the overall shape of the reflective structure array according to an example embodiment.

[0063] Figure 24 yes Figure 23 A plan view of the reflective structure.

[0064] Figure 25 This is a diagram showing the overall shape of the reflective structure array according to an example embodiment.

[0065] Figure 26 yes Figure 25 A plan view of the reflective structure.

[0066] Figure 27 This is a conceptual diagram of a floating image display device according to an example embodiment. Detailed Implementation

[0067] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following drawings, the same reference numerals denote the same elements, and the dimensions of each element in the drawings may be exaggerated for clarity and ease of description. The embodiments described herein are merely examples, and various modifications can be made to them.

[0068] In the following text, the term "on" may include not only situations where it is directly on something in a contact manner, but also situations where it is on something in a non-contact manner.

[0069] Unless the context clearly indicates otherwise, the singular form as used herein is intended to include the plural form as well. It should be understood that the terms “comprising” or “having” as used herein specify the presence of the stated element, but do not exclude the presence or addition of one or more other elements.

[0070] Furthermore, terms such as "...device" described in the specification refer to a unit that processes at least one function or operation, and can be implemented as hardware, software, or a combination of hardware and software.

[0071] Figure 1 This is a perspective view of the reflective structure according to an example embodiment. Figure 2 yes Figure 1 A plan view of the reflective structure. Figure 3 yes Figure 1 A side view of the reflective structure. Figure 4 It is used to describe incident on Figure 1 A diagram illustrating the path of light through the reflective structure. Figure 5 yes Figure 4 A side view of the reflective structure.

[0072] Reference Figures 1 to 3A reflective structure 10 may be provided. The reflective structure 10 may include a substrate 100, a first light-blocking layer 310, and a first reflective pillar 210. The substrate 100 may include a first surface 100a and a second surface 100b that are opposite to each other. For example, the first surface 100a and the second surface 100b may be parallel to each other. The first surface 100a may extend in a first direction DR1 and a second direction DR2 that intersect each other. For example, the first direction DR1 and the second direction DR2 may be perpendicular to each other. The substrate 100 may include a transparent material. For example, the substrate 100 may include glass or transparent plastic. However, the material included in the substrate 100 is not limited to the above-described materials.

[0073] A first reflective post 210 may be disposed on the substrate 100. The first reflective post 210 may extend in a third direction DR3 intersecting with the first surface 100a of the substrate 100. For example, the third direction DR3 may be perpendicular to the first surface 100a. The first reflective post 210 may include a top surface 210a, a bottom surface 210b, a first reflective side surface 210c, a second reflective side surface 210d, and a front surface 210e. The bottom surface 210b of the first reflective post 210 may be a surface opposite to the first surface 100a of the substrate 100. The top surface 210a of the first reflective post 210 may be a surface opposite to the bottom surface 210b of the first reflective post 210. The first reflective side surface 210c, the second reflective side surface 210d, and the front surface 210e may be arranged between the top surface 210a and the bottom surface 210b. The first reflective side surface 210c may be perpendicular to the second reflective side surface 210d. A front surface 210e may be disposed between a first reflective side surface 210c and a second reflective side surface 210d. The front surface 210e may extend from an edge of the first reflective side surface 210c on the opposite side of the corner where the first reflective side surface 210c intersects with the second reflective side surface 210d, to an edge of the second reflective side surface 210d on the opposite side of the corner where the first reflective side surface 210c intersects with the second reflective side surface 210d. The front surface 210e may be flat. For example, the front surface 210e may extend in a fourth direction DR4 parallel to the edge where the first surface 210e intersects with the first surface 100a of the substrate 100. The top surface 210a and bottom surface 210b of the first reflective pillar 210 may be triangular. The first reflective pillar 210 may be a substantially triangular pillar. The first reflective pillar 210 may be transparent. The first reflective pillar 210 may comprise a photoresist material. For example, the first reflective pillar 210 may comprise polymethyl methacrylate (PMMA) or SU-8. The aspect ratio of the first reflector 210 can be greater than or equal to 0.6 and less than or equal to 3.5. The aspect ratio of the first reflector 210 can be the ratio of its height to its width. Specifically, the aspect ratio of the first reflector 210 can be expressed by the following equation:

[0074] The aspect ratio of the first reflective column 210 is equal to (the height of the first reflective column 210) / (the width of the first reflective side surface 210c).

[0075] A first light-blocking layer 310 may be disposed on the substrate 100. The first light-blocking layer 310 may surround the first reflective pillar 210. The first light-blocking layer 310 and the first reflective pillar 210 may not overlap each other on a third-direction DR3. The first light-blocking layer 310 may reflect or absorb light. For example, the first light-blocking layer 310 may reflect or absorb visible light. When the light-blocking layer 310 reflects visible light, the first light-blocking layer 310 may include a metal. For example, the first light-blocking layer 310 may include aluminum (Al), chromium (Cr), silver (Ag), or any combination thereof. When the first light-blocking layer 310 absorbs visible light, the first light-blocking layer 310 may include a light-absorbing material.

[0076] A first opening OP1 may be disposed between the first reflective pillar 210 and the first light-blocking layer 310. The first opening OP1 may be disposed next to the front surface 210e of the first reflective pillar 210. The first opening OP1 may expose the first surface 100a of the substrate 100. When the first light-blocking layer 310 extends to the area where the first opening OP1 is disposed, light may enter the first reflective pillar 210 only through the bottom surface 210b of the first reflective pillar 210. The first opening OP1 may be disposed in the path of light entering the first reflective pillar 210 through the front surface 210e of the first reflective pillar 210. The first opening OP1 may allow light to enter the first reflective pillar 210 through the front surface 210e of the first reflective pillar 210. The light path in the reflective structure 10 is described below.

[0077] Reference Figure 4 and Figure 5 The first beam L1, the second beam L2, and the third beam L3 can be incident on the second surface 100b of the substrate 100. For example, the first beam L1, the second beam L2, and the third beam L3 can be emitted from a real imaging element (not shown) and reach the substrate 100. The image can be viewed from the reflective structure 10 in the fourth direction DR4. Figure 5 The first beam L1, the second beam L2, and the third beam L3 are shown in the diagram.

[0078] A first light beam L1 can be provided to a first reflective pillar 210 via a substrate 100. The first light beam L1 enters the first reflective pillar 210 via its bottom surface 210b. The first light beam L1 can be reflected by a first reflective side surface 210c and a second reflective side surface 210d within the first reflective pillar 210. The points where the first light beam L1 is reflected by the first reflective side surface 210c and the second reflective side surface 210d are represented by points (1_1) P1_1 and (1_2) P1_2. For example, point (1_1) P1_1 can be the point where the first light beam L1 is reflected by the first reflective side surface 210c, and point (1_2) P1_2 can be the point where the first light beam L1 is reflected by the second reflective side surface 210d. The first light beam L1 can be reflected from point (1_2) P1_2 and then emitted through the top surface 210a to the outside of the first reflective pillar 210. The first light beam L1 can contribute to the generation of the desired floating image.

[0079] The second beam L2 can be provided to the first opening OP1 through the substrate 100. The second beam L2 can be emitted to the outside of the substrate 100 through the first opening OP1 and reach the front surface 210e of the first reflective pillar 210. The second beam L2 can enter the first reflective pillar 210 through the front surface 210e of the first reflective pillar 210. The second beam L2 can be reflected by the first reflective side surface 210c and the second reflective side surface 210d in the first reflective pillar 210. The points where the second beam L2 is reflected by the first reflective side surface 210c and the second reflective side surface 210d are represented by points (2_1) P2_1 and (2_2) P2_2. For example, point (2_1) P2_1 can be the point where the second beam L2 is reflected by the first reflective side surface 210c, and point (2_2) P1_2 can be the point where the second beam L2 is reflected by the second reflective side surface 210d. The second beam L2 can be reflected from point (2_2) P2_2 and then emitted through the front surface 210e to the outside of the first reflective column 210. The second beam L2, together with the first beam L1, can help generate the desired floating image.

[0080] The third beam L3 can reach the first light-blocking layer 310 through the substrate 100. The third beam L3 can be reflected or absorbed by the first light-blocking layer 310. The third beam L3 can be emitted to the outside of the substrate 100 without passing through the first surface 100a of the substrate 100. When the first light-blocking layer 310 is not present, the third beam L3 can be emitted to the outside of the substrate 100 to help generate a direct image and / or a ghost image. A direct image can refer to an image generated when light emitted from the actual image element is transmitted through the reflective structure without being reflected by the reflective structure 10. A ghost image can refer to an image generated at an unwanted location. The third beam L3 may not contribute to the generation of a floating image.

[0081] When the reflector has a rectangular prism shape, light emitted through all four side surfaces of the reflector to the outside of the reflector may not contribute to generating a floating image. Light emitted only through the top surface of the reflector with a rectangular prism shape to the outside of the reflector can contribute to generating a floating image.

[0082] In this disclosure, a floating image can be generated using light emitted from the top surface 210a of the first reflective pillar 210 to the outside of the first reflective pillar 210 and light emitted from the front surface 210e of the first reflective pillar 210 to the outside of the first reflective pillar 210. Therefore, a highly efficient reflective structure 10 can be provided.

[0083] The first light-blocking layer 310 of this disclosure can selectively block light (e.g., a third beam L3) not provided to the bottom surface 210b and front surface 210e of the first reflective pillar 210. Therefore, the generation of ghost images and direct images can be reduced.

[0084] Figure 6 This is a perspective view of the reflective structure according to an example embodiment. Figure 7 yes Figure 6 A plan view of the reflective structure. Figure 8 yes Figure 6 A side view of the reflective structure. Figure 9 It is used to describe incident on Figure 6 A diagram illustrating the path of light through the reflective structure. Figure 10 yes Figure 9 A side view of the reflective structure. For the sake of brevity, the reference above can be omitted. Figures 1 to 5 The descriptions provided are essentially the same.

[0085] Reference Figures 6 to 8 A reflective structure 11 can be provided. The reflective structure 11 may include a substrate 100, a first light-blocking layer 310, a first reflective pillar 210, and a second light-blocking layer 320. The substrate 100, the first light-blocking layer 310, and the first reflective pillar 210 can be respectively connected to a reference... Figures 1 to 3 The substrate 100, the first light-blocking layer 310, and the first reflective pillar 210 described are substantially the same.

[0086] With reference Figures 1 to 3Depending on the description, a second light-blocking layer 320 may be disposed on the top surface 210a of the first reflective pillar 210. The second light-blocking layer 320 may reflect or absorb light. The second light-blocking layer 320 may comprise a material substantially the same as that of the first light-blocking layer 310. The second light-blocking layer 320 prevents light from being emitted through the top surface 210a of the first reflective pillar 210 to the outside of the first reflective pillar 210. Although the second light-blocking layer 320 is shown as completely covering the top surface 210a of the first reflective pillar 210, this is merely an example. In another embodiment, the second light-blocking layer 320 may cover a portion of the top surface 210a of the first reflective pillar 210 and expose the remaining portion of the top surface 210a of the first reflective pillar 210.

[0087] Reference Figure 9 and Figure 10 The first beam L1, the second beam L2, and the third beam L3 can be incident on the second surface 100b of the substrate 100. For example, the first beam L1, the second beam L2, and the third beam L3 can be emitted from a real imaging element and reach the substrate 100. The second beam L2 and the third beam L3 can be respectively incident on a reference surface. Figure 4 and Figure 5 The second beam L2 and the third beam L3 described are substantially the same. A portion of the first beam L1 can be reflected in the first reflective column 210 by the first reflective side surface 210c and the second reflective side surface 210d, and another portion of the first beam L1 can be reflected in the first reflective column 210 by one of the first reflective side surface 210c and the second reflective side surface 210d.

[0088] With reference Figure 4 and Figure 5 Unlike those described, the second light-blocking layer 320 can reflect or absorb the first light beam LB1. The first light beam LB1 may not exit to the outside of the first reflective pillar 210 through the top surface 210a of the first reflective pillar 210. The second light-blocking layer 320 can prevent the generation of ghost images by another portion of the first light beam L1 (i.e., the first light beam L1 reflected in the first reflective side surface 210c and the second reflective side surface 210d in the first reflective pillar 210).

[0089] This disclosure provides a reflective structure 11 that generates a high-resolution floating image by preventing the generation of direct and ghost images.

[0090] Figure 11 This is a perspective view of the reflective structure according to an example embodiment. Figure 12 yes Figure 11 A side view of the reflective structure. For the sake of brevity, the reference above can be omitted. Figures 1 to 3 as well as Figure 9 and Figure 10 The descriptions provided are essentially the same.

[0091] Reference Figure 11 and Figure 12 A reflective structure 12 can be provided. The reflective structure 12 may include a substrate 100, a first light-blocking layer 310, a third light-blocking layer 330, and a first reflective pillar 210. The substrate 100, the first light-blocking layer 310, and the first reflective pillar 210 can be respectively connected to a reference... Figures 1 to 3 The substrate 100, the first light-blocking layer 310, and the first reflective pillar 210 described are substantially the same.

[0092] A third light-blocking layer 330 may be disposed between the substrate 100 and the first reflective pillar 210. The substrate 100 and the first reflective pillar 210 may be spaced apart from each other by the third light-blocking layer 330. Although the third light-blocking layer 330 is shown as completely covering the bottom surface 210b of the first reflective pillar 210, this disclosure is not limited thereto. In another exemplary embodiment, the third light-blocking layer 330 may cover a portion of the bottom surface 210b of the first reflective pillar 210 and expose another portion of the bottom surface 210b of the first reflective pillar 210. In this case, the exposed portion of the bottom surface 210b of the first reflective pillar 210 may extend toward the substrate 100 and may be in direct contact with the first surface 100a of the substrate 100. The third light-blocking layer 330 may reflect or absorb light. The third light-blocking layer 330 may include components related to the reference... Figures 1 to 3 The first light-blocking layer 310 is made of substantially the same material. The third light-blocking layer 330 and the first light-blocking layer 310 can be formed as a single structure. For example, the third light-blocking layer 330 and the first light-blocking layer 310 can be connected to each other without a boundary between them.

[0093] The third light-blocking layer 330 can block light from entering the first reflective pillar 210 through the bottom surface 210b of the first reflective pillar 210. For example, the third light-blocking layer 330 can block reference light. Figure 9 and Figure 10 The first beam L1 enters the first reflective column 210. Therefore, it is possible to prevent the generation of ghost images by another part of the first beam L1 (i.e., the first beam L1 reflected in the first reflective side surface 210c and the second reflective side surface 210d in the first reflective column 210).

[0094] This disclosure provides a reflection structure 12 that generates a high-resolution floating image by preventing the generation of direct and ghost images.

[0095] Figure 13 This is a perspective view of the reflective structure according to an example embodiment. Figure 14 yes Figure 13 A plan view of the reflective structure. Figure 15 yes Figure 13A side view of the reflective structure. For the sake of brevity, the reference above can be omitted. Figures 1 to 3 as well as Figure 9 and Figure 10 The descriptions provided are essentially the same.

[0096] Reference Figures 13 to 15 A reflective structure 13 can be provided. The reflective structure 13 may include a substrate 100, a first light-blocking layer 310, a fourth light-blocking layer 340, and a first reflective pillar 210. The substrate 100, the first light-blocking layer 310, and the first reflective pillar 210 can be respectively connected to a reference... Figures 1 to 3 The substrate 100, the first light-blocking layer 310, and the first reflective pillar 210 described are substantially the same.

[0097] With reference Figures 1 to 3 Depending on the description, the fourth light-blocking layer 340 may be disposed on the top surface 210a, the first reflective side surface 210c, and the second reflective side surface 210d of the first reflective pillar 210. The fourth light-blocking layer 340 may reflect light. For example, the fourth light-blocking layer 340 may comprise a material substantially the same as that of the first light-blocking layer 310 that reflects light.

[0098] Although the fourth light-blocking layer 340 is shown as completely covering the top surface 210a, the first reflective side surface 210c, and the second reflective side surface 210d of the first reflective pillar 210, this disclosure is not limited thereto. In another example embodiment, the fourth light-blocking layer 340 may partially cover each of the top surface 210a, the first reflective side surface 210c, and the second reflective side surface 210d of the first reflective pillar 210. The fourth light-blocking layer 340 disposed on the first reflective side surface 210c and the second reflective side surface 210d can improve the light reflection efficiency of the first reflective side surface 210c and the second reflective side surface 210d. In other words, the fourth light-blocking layer 340 can increase the intensity of reflected light compared to the intensity of light incident on the first reflective side surface 210c and the second reflective side surface 210d. The fourth light-blocking layer 340 disposed on the top surface 210a of the first reflective pillar 210 can prevent light reflection from being reflected by a reference surface. Figure 9 and Figure 10 Another portion of the first beam L1 described (i.e., the first beam L1 reflected in the first reflective column 210 by one of the first reflective side surface 210c and the second reflective side surface 210d) generates a ghost image.

[0099] This disclosure provides a reflection structure 13 that generates a high-resolution floating image by preventing the generation of direct and ghost images. This disclosure provides a highly efficient reflection structure 13.

[0100] Figure 16 This is a perspective view of the reflective structure according to an example embodiment. Figure 17 yes Figure 16 A bottom view of the reflective structure. Figure 18 yes Figure 16 A side view of the reflective structure. For the sake of brevity, the reference above can be omitted. Figures 1 to 5 The descriptions provided are essentially the same.

[0101] Reference Figures 16 to 18 A reflective structure 14 can be provided. The reflective structure 14 may include a substrate 100, a fifth light-blocking layer 350, and a first reflective pillar 210. The substrate 100 and the first reflective pillar 210 can be referenced. Figures 1 to 3 The substrate 100 and the first reflective post 210 described are substantially the same.

[0102] A fifth light-blocking layer 350 may be disposed on the second surface 100b of the substrate 100. The fifth light-blocking layer 350 may reflect or absorb light. For example, the fifth light-blocking layer 350 may include components similar to those referenced. Figures 1 to 3 The material of the first light-blocking layer 310 described is substantially the same. The fifth light-blocking layer 350 may include a second opening OP2 on the second surface 100b of the exposed substrate 100.

[0103] Relative to the third-direction DR3, the second opening OP2 may not be aligned with the first reflective pillar 210. The second opening OP2 may not overlap with the first reflective pillar 210 on the third-direction DR3. For example, the second opening OP2 may be spaced apart from the area facing the first reflective pillar 210. Light supplied to the first reflective pillar 210 by the substrate 100 ( Figure 4 and Figure 5 The first beam L1 and the second beam L2 can pass through the second opening OP2.

[0104] The fifth light-blocking layer 350 can selectively block light traveling toward the first reflective column 210. Figure 4 and Figure 5 The first beam L1 and the second beam L2) pass through. The fifth light-blocking layer 350 can block light that is not traveling toward the first reflective column 210. Figure 4 and Figure 5 The third beam L3).

[0105] This disclosure provides a reflective structure 14 that utilizes light emitted from the first reflective pillar 210 through the top surface 210a and front surface 210e of the first reflective pillar 210. Figure 4 and Figure 5 The first beam L1 and the second beam L2 are used to generate a floating image. This disclosure provides a reflection structure 14 to prevent the generation of a direct image.

[0106] Figure 19 This is a perspective view of the reflective structure according to an example embodiment. Figure 20 yes Figure 19 A plan view of the reflective structure. For the sake of simplicity, the reference above can be omitted. Figures 1 to 5 The descriptions provided are essentially the same.

[0107] Reference Figure 19 and Figure 20 A reflective structure 15 can be provided. The reflective structure 15 may include a substrate 100, a first light-blocking layer 310, and a second reflective pillar 210'. The substrate 100 and the first light-blocking layer 310 can be respectively connected to a reference... Figures 1 to 3 The substrate 100 and the first light-blocking layer 310 described are substantially the same.

[0108] The second reflective post 210' may include a top surface 210a', a bottom surface 210b', a first reflective side surface 210c, a second reflective side surface 210d, and a front surface 210e'. The first reflective side surface 210c and the second reflective side surface 210d may be respectively aligned with a reference surface. Figure 1-3 The first reflective side surface 210c and the second reflective side surface 210d described are substantially the same.

[0109] With reference Figures 1 to 3 The differences described include that the top surface 210a' and the bottom surface 210b' may each have a fan-shaped shape. The front surface 210e' may have a convex shape. When viewed from a third party towards DR3, the front surface 210e' may focus light emitted from the second reflective pillar 210' through the front surface 210e'. The second reflective pillar 210' may be substantially identical to a portion of a cylindrical shape.

[0110] This disclosure provides a highly efficient reflective structure 15. This disclosure also provides a reflective structure 15 that prevents the generation of direct images.

[0111] Figure 21 This is a diagram showing the overall shape of the reflective structure array according to an exemplary embodiment. Figure 22 yes Figure 21 A plan view of the reflective structure. For the sake of simplicity, the reference above can be omitted. Figures 1 to 3 The descriptions provided are essentially the same.

[0112] Reference Figure 21 and Figure 22 A reflective structure array 20 can be provided. The reflective structure array 20 may include a substrate 100, a light-blocking layer 300 including multiple openings OP, and multiple reflective pillars 200. In addition to the openings OP and reflective pillars 200, the reflective structure array 20 can be connected to a reference... Figures 1 to 3The described reflective structure 10 is generally the same. However, in other examples, the reflective structure array 20 may be an array of at least one of the aforementioned reflective structures 11, 12, 13, 14, and 15. The arrangement of the opening OP and the reflective pillars 200 is described below.

[0113] The reflector pillar 200 may include a plurality of first reflector groups RG1 and a plurality of second reflector groups RG2 alternately arranged in a first direction DR1. Each first reflector group RG1 may include a first reflector pillar RGP1 ​​arranged in the second direction DR2. For example, the first reflector pillars RGP1 ​​may be arranged at regular intervals. Each second reflector group RG2 may include a second reflector pillar RGP2 arranged in the second direction DR2. For example, the second reflector pillars RGP2 may be arranged at regular intervals. For example, the distance between the reflector pillars 200 may be equal to or less than twice the height of the reflector pillar 200. For example, the front surface of the reflector pillar 200 ( Figures 1 to 3 The distance between 210e) can be equal to or greater than 0.3 times the height of the reflector column 200.

[0114] The first reflector group RG1 and the second reflector group RG2 can be arranged alternately. For example, when viewed from the first direction DR1, the second reflector column RGP2 can be arranged between the first reflector columns RGP1. For example, the first reflector columns RGP1 ​​in the first reflector group RG1 and the second reflector columns RGP2 in the second reflector group RG2, which are adjacent to each other, can be arranged in a sawtooth shape in the second direction DR2.

[0115] In this disclosure, the minimum distance between reflective columns 200 can be the distance between the first reflective column RGP1 ​​in the first reflective group RG1 and the second reflective column RGP2 in the adjacent second reflective group RG2.

[0116] The openings OP can be respectively set in the areas adjacent to the reflector pillar 200. For example, the openings OP can be respectively set on the front surface of the reflector pillar 200. Figures 1 to 3 Next to 210e). The opening OP can be on the third direction DR3 without overlapping with the reflective column 200.

[0117] In this disclosure, the top surface of the reflective column 200 can be used ( Figures 1-3 (210a) Light emitted to the outside of the reflector 200 and light passing through the front surface of the reflector 200 ( Figures 1-3 (210e) Light emitted towards the outside of the reflective column 200 is used to generate a floating image. Therefore, a highly efficient reflective structure array 20 can be provided.

[0118] The light-blocking layer 300 disclosed herein can selectively block the bottom surface that is not facing the reflective column 200. Figures 1 to 3 210b) and front surface ( Figures 1 to 3The 210e) traveling light. Therefore, the generation of a direct image can be prevented.

[0119] Figure 23 This is a diagram showing the overall shape of the reflective structure array according to an example embodiment. Figure 24 yes Figure 23 A plan view of the reflective structure. For the sake of simplicity, the reference above can be omitted. Figures 1 to 3 The descriptions provided are essentially the same.

[0120] Reference Figure 23 and Figure 24 A reflective structure array 21 can be provided. The reflective structure array 21 may include a substrate 100, a light-blocking layer 300 including multiple openings OP, and multiple reflective pillars 200. In addition to the openings OP and reflective pillars 200, the reflective structure array 21 can be connected to a reference... Figures 1 to 3 The reflective structure 10 is substantially the same. However, in another example, the reflective structure array 21 may be an array of at least one of the aforementioned reflective structures 11, 12, 13, 14, and 15. The arrangement of the opening OP and the reflective pillars 200 will be described below.

[0121] The reflector pillars 200 may be arranged radially. The reflector pillars 200 may include multiple reflector groups RG spaced at different distances from the virtual point. A reflector group RG may include reflector pillars RGP spaced at the same distance from the virtual point. The reflector pillars RGP in a reflector group RG may be arranged along a virtual arc centered on the virtual point. For example, the distance between reflector pillars 200 may be equal to or less than twice the height of the reflector pillars 200. For example, the distance between the front surfaces of reflector pillars 200 may be equal to or greater than 0.3 times the height of the reflector pillars 200.

[0122] The openings OP can be respectively set in the areas adjacent to the reflector pillar 200. For example, the openings OP can be respectively set on the front surface of the reflector pillar 200. Figures 1 to 3 Next to 210e). The opening OP can be on the third direction DR3 without overlapping with the reflective column 200.

[0123] This disclosure provides a highly efficient reflective structure array 21. This disclosure provides a reflective structure array 21 that generates high-resolution floating images by preventing the generation of direct images.

[0124] Figure 25 This is a diagram showing the overall shape of the reflective structure array according to an example embodiment. Figure 26 yes Figure 25 A plan view of the reflective structure. For the sake of simplicity, the reference above can be omitted. Figures 1 to 3 The descriptions provided are essentially the same.

[0125] Reference Figure 25 and Figure 26 A reflective structure array 22 can be provided. The reflective structure array 22 may include a substrate 100, a light-blocking layer 300 including multiple openings OP, and multiple reflective pillars 200. In addition to the openings OP and reflective pillars 200, the reflective structure array 22 can be connected to a reference... Figures 1 to 3 The described reflective structure 10 is substantially the same. However, in another example, the reflective structure array 22 may be an array of at least one of the aforementioned reflective structures 11, 12, 13, 14, and 15. The arrangement of the opening OP and the reflective pillars 200 will be described below.

[0126] The reflective pillars 200 can be arranged in a first direction DR1 and a second direction DR2. For example, the reflective pillars 200 can be arranged at regular intervals. In this disclosure, the minimum distance between the reflective pillars 200 can be the distance between a pair of reflective pillars RGPs that are adjacent to each other in the first direction DR1 or the distance between a pair of reflective pillars RGPs that are adjacent to each other in the second direction DR2. For example, the distance between the reflective pillars 200 can be equal to or less than twice the height of the reflective pillars 200. For example, the distance between the front surfaces of the reflective pillars 200 can be equal to or greater than 0.3 times the height of the reflective pillars 200.

[0127] The reflector column 200 may include a plurality of reflector groups RG arranged in a first direction DR1. Each reflector group RG may include a reflector column RGP arranged in a second direction DR2. For example, the reflector columns RGP may be arranged at regular intervals. The reflector columns RGP in different reflector groups RG may overlap each other in the second direction DR2.

[0128] The openings OP can be respectively set in the areas adjacent to the reflector pillar 200. For example, the openings OP can be respectively set on the front surface of the reflector pillar 200. Figures 1 to 3 Next to 210e). The opening OP can be on the third direction DR3 without overlapping with the reflective column 200.

[0129] This disclosure provides a highly efficient reflective structure array 22. This disclosure also provides a reflective structure array 22 that generates high-resolution floating images by preventing the generation of direct images.

[0130] Figure 27 This is a conceptual diagram of a floating image display device according to an example embodiment. For the sake of brevity, references to the above can be omitted. Figures 21 to 26 The descriptions provided are essentially the same.

[0131] Reference Figure 27 A floating image display device 30 may be provided. The floating image display device 30 may include a reflective structure array 20 and a real image element (RIE). The reflective structure array 20 may be a reference... Figure 21 and Figure 22 The described reflective structure array 20. However, this disclosure is not limited thereto. In another embodiment, the reflective structure array 20 may be a reference... Figure 23 and Figure 24 The described reflective structure array 21 or reference Figure 25 and Figure 26 The described reflective structure array 22.

[0132] A real image element (RIE) may be disposed on one side of the reflective structure array 20. For example, the RIE may be disposed on the second surface 100b of the substrate 100 in the reflective structure array 20. The RIE may emit light that generates a real image. For example, the RIE may include a real object or display device from which the image is output. The light emitted from the RIE may be reflected by the reflective structure array 20. The light reflected from the reflective structure array 20 may generate a floating image FI on the other side of the reflective structure array 20.

[0133] The floating image display device 30 of this disclosure can generate a floating image when the user 1000 of the floating image display device 30 can see the floating image by viewing the reflective structure array 20 from the opposite side of the reflective structure array 20 relative to the floating image FI.

[0134] The description of embodiments of the technical concept of this disclosure provides examples for describing the technical concept of this disclosure. Therefore, the technical concept of this disclosure is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications and changes can be made to the embodiments by combining them.

Claims

1. A reflective structure, comprising: The substrate includes a first surface and a second surface opposite to the first surface; A reflective pillar is disposed on the first surface of the substrate; as well as A first light-blocking layer covers the first surface of the substrate. The first light-blocking layer includes an opening adjacent to the reflective pillar and exposing a portion of a first surface of the substrate. The reflective column includes: First reflective side surface; The second reflective side surface is perpendicular to the first reflective side surface; and The front surface extends between the first reflective side surface and the second reflective side surface. The opening is adjacent to the front surface.

2. The reflective structure of claim 1, wherein, The front surface is planar, and The reflective column has a triangular prism shape.

3. The reflective structure of claim 1, further comprising: A second light-blocking layer is disposed on the top surface, the first reflective side surface, and the second reflective side surface of the reflective column.

4. The reflective structure of claim 1, further comprising: A second light-blocking layer is disposed on the top surface of the reflective column.

5. The reflective structure of claim 1, further comprising: A third light-blocking layer is disposed between the bottom surface of the reflective column and the substrate.

6. The reflective structure of claim 1, wherein, The aspect ratio of the reflective column is in the range of 0.6 to 3.5, and The aspect ratio of the reflective column is determined by the following equation: Aspect ratio = (height of the reflective column) / (width of the first reflective side surface).

7. A reflective structure array, comprising: substrate; Multiple reflective pillars are disposed on the first surface of the substrate; as well as A first light-blocking layer covers the first surface of the substrate. The first light-blocking layer includes multiple openings that expose multiple portions of a first surface of the substrate, each of the multiple openings being adjacent to a corresponding reflective pillar of the multiple reflective pillars. The plurality of reflective pillars and the plurality of openings that are adjacent to each other are arranged in a first direction parallel to the first surface of the substrate. Each of the plurality of reflective pillars includes: First reflective side surface; The second reflective side surface is perpendicular to the first reflective side surface; and The front surface extends between the first reflective side surface and the second reflective side surface. Each of the plurality of openings is adjacent to the front surface of the corresponding reflective post.

8. The array of reflective structures of claim 7, wherein, The distance between adjacent reflective columns is equal to or less than twice the height of each reflective column.

9. The reflective structure array as described in claim 7, wherein, The distance between the front surfaces of adjacent reflective pillars of the plurality of reflective pillars is equal to or greater than 0.3 times the height of each of the plurality of reflective pillars.

10. The array of reflective structures of claim 7, wherein, The plurality of reflective pillars include a plurality of first reflective groups arranged in a first direction, and Each of the plurality of first reflective groups includes a plurality of first reflective pillars, which are arranged in a second direction that is parallel to the first surface and intersects the first direction.

11. The reflective structure array as described in claim 7, wherein, The front surface is planar, and Each of the plurality of reflective pillars has a triangular prism shape.

12. The reflective structure array as described in claim 7, in, Each of the plurality of openings is adjacent to the front surface of the corresponding reflective post among the plurality of reflective posts.

13. The reflective structure array as described in claim 7, further comprising: A second light-blocking layer is disposed on the top surface, the first reflective side surface, and the second reflective side surface of each of the plurality of reflective pillars.

14. The reflective structure array as described in claim 7, further comprising: A second light-blocking layer is disposed on the top surface of each of the plurality of reflective pillars.

15. The reflective structure array as described in claim 7, further comprising: A second light-blocking layer is disposed between the bottom surface of each of the plurality of reflective pillars and the substrate.

16. A floating image display device, comprising: A real image element is configured to output light that generates a real image; as well as The reflective structure array is configured to generate a floating image by reflecting light output from the real imaging element. The reflective structure array includes: substrate; Multiple reflective pillars are disposed on the first surface of the substrate; and A first light-blocking layer covers a first surface of the substrate. The first light-blocking layer includes a plurality of first openings exposing a plurality of portions of the first surface of the substrate. Each of the plurality of first openings is adjacent to a corresponding reflective pillar of the plurality of reflective pillars. The plurality of reflective pillars and the plurality of first openings are arranged in a first direction parallel to the first surface. Each of the plurality of reflective pillars includes: First reflective side surface; The second reflective side surface is perpendicular to the first reflective side surface; and The front surface extends between the first reflective side surface and the second reflective side surface. Each of the plurality of first openings is adjacent to the front surface of the corresponding reflective post.

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