Floating display device and floating display touch device

Abstract

The application discloses a floating display device and a floating display touch device. The floating display device comprises a display light source, an optical imaging sheet and a microlens array sheet. The microlens array sheet has a plurality of microlenses arranged in an array. The optical imaging sheet has a plurality of sub-image unit pairs corresponding to the microlenses arranged in an array. The sub-image unit comprises a plurality of first sub-image units and a plurality of second sub-image units. Each first sub-image unit has a first main image pattern, and each second sub-image unit has a second main image pattern. The first main image pattern and the second main image pattern have the same pattern. The second sub-image units are arranged to form an auxiliary image pattern. At least part of the second sub-image units respectively has a bottom image pattern, and the bottom image pattern is located at the periphery of the second main image pattern.

Description

Technical Field

[0001] This invention generally relates to a floating display device, and more specifically, to a floating display device with a wide viewing angle and a floating display touch device. Background Technology

[0002] With advancements in display technology, various new display technologies are constantly being developed. Among them, projection display technology, due to its gradual miniaturization, has seen the development and application of small-sized micro-projection technology. Recently, micro-projection technology has begun to be used to project suspended images into the air, and the resulting images are called floating images. Because floating images are projected directly into the air without the need for a screen or other medium, floating display technology is gaining increasing attention and leading to various applications.

[0003] In recent years, due to the rapid spread of diseases, contact transmission caused by items used in public spaces has gradually gained attention. Elevator buttons, machine buttons, and touchscreen displays in public spaces often become mediums for disease transmission. When one user leaves germs after touching these items, the next user can easily become infected and become the next carrier. Because levitation display technology does not require direct contact with the items, it is increasingly being applied to public items such as elevator buttons, machine buttons, and touchscreen displays.

[0004] Floating display technology combined with floating touch technology can achieve the human-computer interaction effect of floating touch, thereby improving the problem of contact transmission. However, current floating display technology mainly projects floating images directly in front of the user, but the viewing angle is narrow. When the user's height or position deviates from directly in front of the floating display device, the displayed image is easily incomplete or even nonexistent, causing inconvenience. Therefore, how to improve the viewing angle so that users can still see the displayed image even when they are off-center has become a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0005] One objective of this invention is to provide a floating display device that can improve the display viewing angle, achieve a wide viewing angle display effect, and allow users to clearly see the displayed image even at an oblique angle.

[0006] An embodiment of the present invention provides a floating display device, including a display light source, an optical imaging sheet, and a microlens array sheet. The microlens array sheet is disposed corresponding to the display light source and has a plurality of microlenses arranged in an array. The optical imaging sheet is disposed between the display light source and the microlens array sheet, and has a plurality of sub-image units arranged in an array, each sub-image unit corresponding to a microlens. Each sub-image unit includes a plurality of first sub-image units and a plurality of second sub-image units. Each first sub-image unit has a first main image pattern, and each second sub-image unit has a second main image pattern, the first main image pattern and the second main image pattern having the same pattern. The second sub-image units are arranged to form an auxiliary image pattern, at least a portion of the second sub-image units each having a bottom image pattern, and the bottom image pattern is located around the second main image pattern.

[0007] Another embodiment of the present invention provides a floating display touch device, including a display light source, a microlens array, a touch module, and an optical imaging sheet. The microlens array is disposed corresponding to the display light source and has a plurality of microlenses arranged in an array. The touch module is disposed adjacent to the microlens array, and the optical imaging sheet is disposed between the display light source and the microlens array. The optical imaging sheet has a plurality of sub-image units arranged in an array, each sub-image unit corresponding to a microlens. Each sub-image unit includes a plurality of first sub-image units and a plurality of second sub-image units. Each first sub-image unit has a first main image pattern, and each second sub-image unit has a second main image pattern, the first main image pattern and the second main image pattern having the same pattern. The second sub-image units are arranged to form an auxiliary image pattern, at least a portion of the second sub-image units each having a bottom image pattern, and the bottom image pattern is located around the second main image pattern.

[0008] Compared to existing technologies, the floating display device of the present invention uses a second sub-image unit arranged to form an auxiliary image pattern. A background image pattern is added around the main image pattern of the second sub-image unit to enhance the effect of the auxiliary image pattern. By providing auxiliary display images through the auxiliary image pattern, users can still see the auxiliary display images at oblique viewing angles, thereby achieving a wide-viewing-angle display effect and improving the user experience of the floating display device. The floating display device of the present invention, by utilizing the aforementioned wide-viewing-angle display image, can achieve a wide-viewing-angle display effect. Attached Figure Description

[0009] Figure 1 This is a side view schematic diagram of a floating display device with a wide viewing angle according to an embodiment of the present invention.

[0010] Figure 2A This is a front view of an optical imaging sheet according to an embodiment of the present invention.

[0011] Figure 2BThis is an exploded view of the first sub-image unit and the second sub-image unit of an optical imaging sheet according to an embodiment of the present invention.

[0012] Figure 3A This is an enlarged schematic diagram of the first sub-image unit of an optical imaging sheet according to an embodiment of the present invention.

[0013] Figure 3B This is an enlarged schematic diagram of the second sub-image unit of an optical imaging sheet according to an embodiment of the present invention.

[0014] Figure 4 This is a three-dimensional display schematic diagram of a floating display device with a wide viewing angle according to an embodiment of the present invention.

[0015] Figure 5A This is a schematic diagram of the arrangement of the second sub-image unit array in an optical imaging sheet according to an embodiment of the present invention.

[0016] Figure 5B This is a schematic diagram of the second sub-image unit arranged in a checkerboard pattern, representing another embodiment of the optical imaging sheet of the present invention.

[0017] Figures 6A to 6C This is a cross-sectional schematic diagram of an optical imaging sheet according to another embodiment of the present invention.

[0018] Figure 7 This is an enlarged schematic diagram of the first sub-image unit and the second sub-image unit of the optical imaging sheet according to another embodiment of the present invention.

[0019] Figure 8 This is a three-dimensional display schematic diagram of a floating display device with a wide viewing angle, according to another embodiment of the present invention.

[0020] Figure 9 This is a cross-sectional schematic diagram of a floating display device according to another embodiment of the present invention.

[0021] In the attached figures, the following labels are used:

[0022] 100, 100a floating display devices

[0023] 200 display light source

[0024] 202 LED

[0025] 204 optical diffuser

[0026] 300, 300a, 300b, 300c optical imaging films

[0027] 302 Image Pattern Layer

[0028] 302u sub-image unit

[0029] 304 transparent substrate

[0030] 3041 First Surface

[0031] 3042 Second Surface

[0032] 310u First Sub-Image Unit

[0033] 312 First Main Image Pattern

[0034] 316 First Remaining Pattern

[0035] 320u Second Sub-Image Unit

[0036] 322 Second Main Image Pattern

[0037] 324 bottom image pattern

[0038] 326 Second Remaining Pattern

[0039] 330 auxiliary image pattern

[0040] 400 microlens array sheet

[0041] 402 microlens

[0042] 500 touch module

[0043] 510 Infrared Light Emitter

[0044] 520 infrared light sensor

[0045] 530 touch sensing area

[0046] 600 circuit board

[0047] 700 connector

[0048] 810 casing

[0049] 820 inner shell

[0050] 1000, 1000a floating display images

[0051] 1200° frontal field of view

[0052] 1300 optical imaging film

[0053] 1302 Image Pattern Layer

[0054] 1302u sub-image unit

[0055] 1310u First Sub-Image Unit

[0056] 1312 First Main Image Pattern

[0057] 1316 First Remaining Pattern

[0058] 1320u Second Sub-Image Unit

[0059] 1322 Second Main Image Pattern

[0060] 1324 bottom image pattern

[0061] 1326 Second Remaining Pattern

[0062] 1330 auxiliary image pattern

[0063] V1, V2, V3 perspectives

[0064] θ1, θ2, α1, α2, β, γ angle Detailed Implementation

[0065] In the various embodiments of the invention, the terminology used herein is for the purpose of describing particular embodiments only and is not restrictive. As used herein, unless the content clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms, including “at least one.” As used herein, the term “a” includes any and all combinations of one or more of the associated listed items.

[0066] In various embodiments of the present invention, the terms "upper," "lower," "left," "right," "front," or "rear" are used herein to describe the relationship between one element and another, and are only used to illustrate the orientation presented in the illustrations, not to limit their actual positions. The orientation or orientation of the elements in the device shown in the drawings is not limited by the rotation of the device.

[0067] Figure 1 This is a side view schematic diagram of a floating display device with a wide viewing angle according to an embodiment of the present invention. Please refer to... Figure 1 The floating display device 100 of the present invention, having a wide viewing angle, includes at least a display light source 200, an optical imaging sheet 300, and a micro-lens array (MLA) 400. In this embodiment, the display light source 200 is, for example, a planar light source, corresponding to the optical imaging sheet 300 and the micro-lens array 400, and is used to provide the light required for displaying wide-viewing-angle images. The display light source 200 can provide, for example, visible light such as white light (W), blue light (B), green light (G), red light (R), or a mixture thereof, and the wavelength range of the light can be adjusted according to product requirements, but is not limited thereto. The display light source 200 can be, for example, a light-emitting diode (LED) or an organic light-emitting diode (OLED), but is not limited thereto. The display light source 200 is not limited to one, but can also be multiple arrays arranged to increase the uniformity of the light source. In addition, various optical films, such as optical diffusers or optical light guides, can be used to achieve the effect of uniform light source.

[0068] Please refer to Figure 1 The microlens array 400 of the present invention is disposed corresponding to the display light source 200 for forming and adjusting levitation imaging. The microlens array 400 has a plurality of microlenses 402u arranged in an array, for example, an M×N (M>1, N>1) array of microlenses 402u. The number of microlenses 402u determines the fineness and three-dimensionality of the levitation display image. For example, a 40×40 array of microlenses 402u can be used to provide a high-precision levitation display image. The microlenses 402u can be, for example, biconvex microlenses, such as... Figure 1 As shown, this can improve the imaging focusing effect, but is not limited to this. The microlens 402u can also be a single convex microlens, a single concave microlens, a double concave microlens, a convex-concave microlens, or combinations thereof, but is not limited to these. Furthermore, the microlens array 400 is not limited to a single piece; it can also be a combination of two or more pieces to adjust the imaging effect. This is well known to those skilled in the art and will not be described further.

[0069] The microlens array sheet 400 is made of transparent plastic, transparent glass, transparent ceramic, or combinations thereof, but is not limited to these. Transparent plastic materials include, for example, polyamide (PA), polyimide (PI), polycarbonate (PC), polyurethane (PU), polyethylenimine (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyethersulfone (PES), fiber reinforced plastics (FRP), poly(methylmethacrylate) (PMMA), polyetheretherketone (PEEK), polydimethylsiloxane (PDMS), or other acrylic polymers, ether polymers, polyolefin polymers, epoxy polymers, or other suitable materials, or combinations thereof, but are not limited thereto. Transparent glass materials include, but are not limited to, soda-lime glass, borosilicate glass, lead glass, quartz glass, tempered glass, or combinations thereof. Transparent ceramic materials include, but are not limited to, transparent alumina, transparent aluminum nitride, transparent silicon oxide, transparent silicon nitride, or combinations thereof.

[0070] Please refer to Figure 1 An optical imaging sheet 300 is disposed between the display light source 200 and the microlens array sheet 400 to form the pattern required for the floating display image. The optical imaging sheet 300 has multiple sub-image units arranged in an array (described in the following figures), for example, it can be an M×N (M>1, N>1) sub-image unit array arrangement, each sub-image unit corresponding to a microlens 402u.

[0071] The floating display device 100 of the present invention can achieve a wide viewing angle display effect. The display light source 200, optical imaging plate 300, and microlens array plate 400 of the floating display device 100 project an image to form a floating display image 1000. When a user views the floating display image 1000 generated by the floating display device 100 from the front at a first viewing angle V1, because it is within the field of view (FOV), a good floating display image 1000 can be seen, but it is limited to the viewing angle θ1. For example, taking the vertical normal direction of the center of the plane of the optical imaging plate 300 as 0 degrees (not shown), the viewing angle θ1 is, for example, ±25 degrees, depending on the product's viewing angle limitations. This viewing angle θ1 limits the user's viewing angle and also limits the product's application range. The floating display device 100 of the present invention, with its wide viewing angle, further provides an auxiliary image (described later) to increase the viewing angle to a viewing angle θ2, for example, ±50 degrees. To ensure users can see the auxiliary display image from both the offset second-viewpoint V2 and the offset third-viewpoint V3, the auxiliary viewing angles α1 (+25 degrees to +50 degrees) and α2 (-25 degrees to -50 degrees) have been increased. The above only illustrates the two offset viewpoints (upper and lower), but the auxiliary display image provides a stereoscopic perspective. Therefore, when the user deviates from the direct first-viewpoint V1, they can still see the display image regardless of whether they are up, down, left, or right, and will not be affected by the offset. Figure 1 The present invention is limited by the example provided. Compared to existing technologies where only a small viewing angle θ1 of the first perspective V1 is visible, the present invention provides an auxiliary display image that extends to a viewing angle θ2, and adds offset viewing angles α1 and α2, allowing the user to see the auxiliary display image from both the offset second perspective V2 and the third perspective V3. Therefore, the floating display device 100 of the present invention expands the application scope of floating display technology and improves the user's viewing experience of the floating display device.

[0072] Figure 2A This is a front view of an optical imaging sheet according to an embodiment of the present invention. Figure 2B This is an exploded view of the first sub-image unit and the second sub-image unit of an optical imaging sheet according to an embodiment of the present invention. Please refer to... Figure 1 , Figure 2A and Figure 2BIn this embodiment, the floating display image 1000 of the present invention is only illustrated by an "upward arrow" pattern. Those skilled in the art can adjust the image to be displayed by the floating display image 1000 according to product requirements. The optical imaging sheet 300 of the present invention has a plurality of sub-image units 302u arranged in an array, for example, an M×N (M>1, N>1) array of sub-image units 302u, used to form the pattern required for the floating display image 1000. The number of sub-image units 302u can determine the fineness and three-dimensionality of the floating display image. For example, a 40×40 sub-image unit 302u array can be used to provide a high-fineness floating display image. Each sub-image unit 302u corresponds to a microlens 402u, and the plurality of sub-image units 302u arranged in an array constitute an image pattern layer 302. The array of multiple sub-image units 302u includes multiple first sub-image units 310u and multiple second sub-image units 320u, wherein the multiple second sub-image units 320u are arranged to form an auxiliary image pattern 330.

[0073] Please refer to Figure 2B The arrayed sub-image units 302u can be divided into two parts according to the arrangement of multiple first sub-image units 310u and multiple second sub-image units 320u: a rear upper right corner illustration and a front lower left corner illustration. The upper right corner illustration is a pattern formed by multiple first sub-image units 310u, with the central blank area excluding the second sub-image units 320u. The lower left corner illustration is a pattern formed by multiple second sub-image units 320u, with the central part forming an auxiliary image pattern 330, which is the auxiliary pattern required to form a wide-viewing-angle display image, and the surrounding blank area excluding the first sub-image units 310u.

[0074] Figure 3A This is an enlarged schematic diagram of the first sub-image unit 310u of an optical imaging sheet according to an embodiment of the present invention. Figure 3B This is an enlarged schematic diagram of the second sub-image unit of an optical imaging sheet according to an embodiment of the present invention. Figure 4 This is a three-dimensional display schematic diagram of a floating display device with a wide viewing angle according to an embodiment of the present invention. In this embodiment, as described above... Figures 1 to 2B The embodiments are similar, and the same reference numerals can be used for comparison, but are not limiting. Please refer to... Figure 1 , Figure 2A and Figure 3AEach first sub-image unit 310u has a first main image pattern 312, corresponding to the pattern of the floating display image 1000. Taking a 40×40 array of sub-image units 302u as an example, the length and width of each first sub-image unit 310u can be, for example, 1 / 40 of the length and width of the floating display image 1000. By projecting the first main image pattern 312 corresponding to multiple first sub-image units 310u, the resolution of the floating display image 1000 is increased. Figure 3A As shown, the first sub-image unit 310u arranged in an M×N pattern is enlarged to a 4×4 arrangement. Each first sub-image unit 310u has a first main image pattern 312, and the remaining portion is a first residual pattern 316. After further enlargement to a 1×1 first sub-image unit 310u, the first main image pattern 312 is a downward arrow pattern. In this embodiment, the first main image pattern 312 is illustrated as a light-blocking pattern, while the remaining first residual patterns 316 are the opposite, light-transmitting patterns. Therefore, the center of the projected floating display image 1000 is a dark, upward-pointing arrow pattern that blocks light, while the corresponding periphery is a light-transmitting bright color, as shown. Figure 4 As shown. The orientation of the first main image pattern 312 is determined by the projection system of the microlens 402u. Taking a biconvex lens as an example, since the projected image is a magnified real image, the pattern of the first main image pattern 312 corresponding to the floating display image 1000 is an inverted downward arrow pattern, rotated 180 degrees downward along the projection plane. Therefore, the pattern of the floating display image 1000 after the first main image pattern 312 is projected corresponds to an upward arrow pattern. The above is only an example for illustration. Those skilled in the art can appropriately modify the projection system, for example, to make the first main image pattern 312 an upward arrow pattern, and the pattern of the floating display image 1000 after projection corresponds to an upward arrow pattern, and it is not limited to this. This is well known to those skilled in the art, so it will not be described in detail.

[0075] Please refer to Figure 1 , Figure 2A , Figure 3A and Figure 3B In this embodiment, each second sub-image unit 320u has a second main image pattern 322 and a bottom image pattern 324, and the remaining portion is a second residual pattern 326. Figure 3B As shown, multiple second sub-image units 320u are arranged to form an auxiliary image pattern 330, such as... Figure 3BThe upward arrow in the left-hand diagram represents the pattern required to form a wide-viewing-angle display image. Each second sub-image unit 320u may, for example, have the same length and width as the first sub-image unit 310u, and its second main image pattern 322 may also, for example, have the same length and width as the first main image pattern 312, but this is not a limitation. The first main image pattern 312 and the second main image pattern 322 have the same pattern, and the second main image pattern 322 functions similarly to the first main image pattern 312. By projecting using the second main image pattern 322, the resolution of the floating display image 1000 is increased.

[0076] In this embodiment, such as Figure 3B As shown, the M×N arranged second sub-image units 320u are enlarged to a 4×4 arrangement. Each second sub-image unit 320u has a second main image pattern 322 and a bottom image pattern 324, with the remaining portion being a second residual pattern 326. After further enlargement to a 1×1 second sub-image unit 320u, the second main image pattern 322 is a downward arrow pattern. The second main image pattern 322 is similar to the first main image pattern 312. The second main image pattern 322 and the bottom image pattern 324 are illustrated using a light-blocking pattern as an example. The remaining second residual pattern 326 is a contrasting light-transmitting pattern. Therefore, the center of the projected floating display image 1000 is a dark, upward-pointing arrow pattern that blocks light, while the corresponding periphery is a light-transmitting bright pattern, as shown. Figure 4 As shown. The orientation of the second main image pattern 322 is determined by the projection system of the microlens 402u. Taking a biconvex lens as an example, since the projected image is a magnified real image, the pattern of the second main image pattern 322 corresponding to the floating display image 1000 is an inverted downward arrow pattern, rotated 180 degrees downward along the projection plane. Therefore, the pattern of the floating display image 1000 after the second main image pattern 322 is projected is an upward arrow pattern. The above is only an example. Those skilled in the art can appropriately modify the projection system so that the second main image pattern 322 is an upward arrow pattern and the pattern of the floating display image 1000 after projection is an upward arrow pattern, and it is not limited to this. This is well known to those skilled in the art, so it will not be described in detail. In this embodiment, the first main image pattern 312 and the second main image pattern 322 have the same pattern, and after projection, the floating display image 1000 viewed from the front of the first perspective V1 is displayed, as shown. Figure 1 and Figure 4 As shown.

[0077] Please refer to Figures 1 to 3BIn this embodiment, the bottom image pattern 324 of the second sub-image unit 320u is located around the second main image pattern 322. For example, the bottom image pattern 324 can surround the second main image pattern 322. Increasing the bottom image pattern 324 enhances the display effect, but this is not limited. The bottom image pattern 324 can also be set only half of the pattern, such as the right half or the left half, or set on all four sides or four corners (not shown). By adjusting the pattern area ratio of the bottom image pattern 324, the light-blocking grayscale effect of the auxiliary image pattern 330 can be adjusted accordingly, thus the brightness of the oblique viewing angle auxiliary display image can be adjusted accordingly. In this embodiment, multiple second sub-image units 320u are arranged to form the auxiliary image pattern 330. The auxiliary image pattern 330 has the same or similar pattern as the first main image pattern 312. Therefore, the auxiliary image pattern 330 has the same or similar pattern as the floating display image 1000. After projection, the auxiliary image pattern 330 displays the auxiliary display image viewed from oblique viewing angles such as the second viewing angle V2 and the third viewing angle V3, such as... Figure 1 and Figure 4 As shown.

[0078] Please refer to Figures 1 to 4 , Figure 1 The floating display device with a wide viewing angle corresponds to Figure 4 Only the key optical imaging sheet 300 is represented in this paper. The optical imaging sheet 300 has a first main image pattern 312 and a second main image pattern 322, as well as an auxiliary image pattern 330. The floating display device 100 of the present invention can achieve a wide viewing angle display effect. When a user views the floating display image 1000 projected from the first main image pattern 312 and the second main image pattern 322 within the optical imaging sheet 300 of the floating display device 100 from the first viewing angle V1, a good floating display image 1000 can be seen because it is within the field of view (FOV) 1200, but it is limited to the viewing angle θ1. For example, taking the vertical normal direction of the center of the plane of the optical imaging sheet 300 as 0 degrees (not shown), the viewing angle θ1 is, for example, ±25 degrees depending on the viewing angle limitation of the product. This viewing angle θ1 limits the user's viewing angle and also limits the application range of the product. The floating display device 100 of the present invention, with a wide viewing angle, further provides an auxiliary display image formed by projecting an auxiliary image pattern 330 within the optical imaging sheet 300, increasing the viewing angle to a viewing angle θ2, for example, ±50 degrees. This allows the user to see the auxiliary display image from both a deviated upper second viewing angle V2 (+25 degrees to +50 degrees) and a lower third viewing angle V3 (-25 degrees to -50 degrees), thus increasing the auxiliary viewing angles α1 and α2. However, the increased auxiliary display image provides a stereoscopic viewing angle; therefore, even when the user deviates from the direct first viewing angle V1, regardless of whether they deviate vertically, horizontally, or vertically, they can still see the display image without being affected by external viewing angles. Figure 4 The example provided is limited. Compared to existing technologies where only a small viewing angle θ1 of the first perspective V1 is visible, this invention provides an auxiliary display image that extends to a viewing angle θ2, adding offset viewing angles α1 and α2, allowing the user to see the auxiliary display image from both the offset second perspective V2 and the third perspective V3. Therefore, the floating display device 100 with a wide viewing angle of this invention increases the application scope of floating display technology and improves the user's viewing experience of the floating display device. The floating display image 1000, in addition to... Figure 4 In addition to the upward arrow pattern, the optical imaging sheet 300 can also use various other patterns, such as number patterns, direction patterns, switch patterns, text patterns, etc., to make the floating display image 1000 form a corresponding pattern, but it is not limited to these, and will not be elaborated here.

[0079] Figure 5A This is a schematic diagram of the arrangement of the second sub-image unit array in an optical imaging sheet according to an embodiment of the present invention. Please refer to... Figure 3B and Figure 5A The multiple second sub-image units 320u are illustrated in a 6×6 arrangement. In this embodiment, the second main image pattern 322 and the bottom image pattern 324 are illustrated as light-blocking patterns, while the remaining second residual patterns 326 are opposite light-transmitting patterns. Each second sub-image unit 320 has a bottom image pattern 324, and the bottom image pattern 324 in each second sub-image unit 320u surrounds the second main image pattern 322. Therefore, the auxiliary image pattern 330 has the highest light-blocking effect, and when the auxiliary display image is viewed from an oblique angle, the auxiliary image pattern has the darkest grayscale and the highest display contrast with the surrounding light-transmitting parts.

[0080] Figure 5B This is a schematic diagram of the checkerboard arrangement of the second sub-image units in an optical imaging sheet according to another embodiment of the present invention. The grayscale display effect of the auxiliary image pattern 330 can be adjusted if needed. In addition to adjusting the pattern area of ​​a single bottom image pattern 324 as described above, the proportion of the bottom image pattern 324 within the auxiliary image pattern 330 can also be adjusted to achieve a similar adjustment effect. Figure 5BAs shown, at least some of the second sub-image units 320ua in the second sub-image unit 320u have a background image pattern 324. Therefore, some of the second sub-image units 320ua have a background image pattern 324, while some of the second sub-image units 320ub do not have a background image pattern 324. Each second sub-image unit 320ua has a second main image pattern 322, a background image pattern 324, and a second residual pattern 326a; each second sub-image unit 320ub has a second main image pattern 322 and a second residual pattern 326b. The arrangement of the second sub-image units 320ua with the background image pattern 324 is, for example, a checkerboard arrangement, and the second sub-image units 320ua and 320ub are arranged alternately, such as... Figure 5B As shown above, the arrangement of the second sub-image unit 320ua with the bottom image pattern 324 can also be other arrangements, such as striped staggered arrangement, triangular staggered arrangement, square staggered arrangement, random staggered arrangement, etc., but is not limited to these. By adjusting the proportion of the bottom image pattern 324 within the auxiliary image pattern 330, the display effect of the auxiliary image pattern 330 can be adjusted, such as adjusting the light-blocking effect to only half, etc., but is not limited to these.

[0081] Figure 6A This is a cross-sectional schematic diagram of the optical imaging sheet 300a according to another embodiment of the present invention. Please refer to Figure 2 and... Figure 6A An array of multiple sub-image units 302u constitutes an image pattern layer 302. If the pattern of the image pattern layer 302 allows, the optical imaging sheet 300 can use only the image pattern layer 302. However, if the pattern of the image pattern layer 302 is discontinuous, a transparent substrate 304 can be added to increase the stability of the image pattern layer 302. For example, the optical imaging sheet 300a has an image pattern layer 302 and a transparent substrate 304. The transparent substrate 304 has a first surface 3041 and a second surface 3042. The image pattern layer 302 can be disposed on the first surface 3041 of the transparent substrate 304. Therefore, the array of multiple sub-image units 302u of the image pattern layer 302 is correspondingly disposed on the transparent substrate 304, thereby increasing the stability of the sub-image units 302u. Figure 6A In this context, the image pattern layer 302 is represented by a single layer. The image pattern layer 302 may also exhibit segmented and discontinuous cross-sectional patterns due to differences in the position of the cross-sectional lines or the patterns themselves. The first surface 3041 of the transparent substrate 304 may face the microlens array sheet 400, for example, and the second surface 3042 may face the display light source 200, for example. By appropriately adjusting the projection object distance and image distance of the floating projection system, a good floating display image 1000 is formed.

[0082] Figure 6BThis is a cross-sectional schematic diagram of an optical imaging sheet according to another embodiment of the present invention. Please refer to Figure 2 and... Figure 6B In addition to the first surface 3041 of the transparent substrate 304, the image pattern layer 302 of the optical imaging sheet 300b can also be disposed on the second surface 3042 of the transparent substrate 304. Therefore, multiple sub-image units 302u of the image pattern layer 302 array are correspondingly disposed on the transparent substrate 304, thereby increasing the stability of the sub-image units 302u. Figure 6B In this context, the image pattern layer 302 is represented by a single layer. The image pattern layer 302 may also exhibit segmented and discontinuous cross-sectional patterns due to differences in the position of the cross-sectional lines or the patterns themselves. The first surface 3041 of the transparent substrate 304 may face the microlens array sheet 400, for example, and the second surface 3042 may face the display light source 200, for example. By appropriately adjusting the projection object distance and image distance of the floating projection system, a good floating display image 1000 is formed.

[0083] Figure 6C This is a cross-sectional schematic diagram of an optical imaging sheet according to another embodiment of the present invention. Please refer to Figure 2 and... Figure 6C The image pattern layer 302 of the optical imaging sheet 300c can also be sandwiched inside the transparent substrate 304. Therefore, multiple sub-image units 302u of the array arrangement of the image pattern layer 302 are correspondingly disposed on the transparent substrate 304, thereby increasing the stability of the sub-image units 302u. Figure 6C In this context, the image pattern layer 302 is represented by a single layer. The image pattern layer 302 may also exhibit segmented and discontinuous cross-sectional patterns due to differences in the position of the cross-sectional lines or the patterns themselves. The first surface 3041 of the transparent substrate 304 may face the microlens array sheet 400, for example, and the second surface 3042 may face the display light source 200, for example. By appropriately adjusting the projection object distance and image distance of the floating projection system, a good floating display image 1000 is formed.

[0084] In embodiments of the present invention, the arrayed sub-image units 302u are disposed on the transparent substrate 304. Generally speaking, the arrayed sub-image units 302u can be disposed on one of the first surface 3041, the second surface 3042, or the interior of the transparent substrate 304, and their positions are not limited.

[0085] In embodiments of the present invention, the transparent substrate 304 is made of transparent plastic material, transparent glass material, transparent ceramic material, and combinations thereof, but is not limited thereto. Transparent plastic materials include, for example, polyamide (PA), polyimide (PI), polycarbonate (PC), polyurethane (PU), polyethylenimine (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyethersulfone (PES), fiber reinforced plastics (FRP), poly(methylmethacrylate) (PMMA), polyetheretherketone (PEEK), polydimethylsiloxane (PDMS), or other acrylic polymers, ether polymers, polyolefin polymers, epoxy polymers, or other suitable materials, or combinations thereof, but are not limited thereto. Transparent glass materials include, but are not limited to, soda-lime glass, borosilicate glass, lead glass, quartz glass, tempered glass, or combinations thereof. Transparent ceramic materials include, but are not limited to, transparent alumina, transparent aluminum nitride, transparent silicon oxide, transparent silicon nitride, or combinations thereof.

[0086] In embodiments of the present invention, the image pattern layer 302 (composed of arrayed sub-image units 302u) is made of a light-shielding material, such as a light-shielding plastic material, a light-shielding metal material, or a light-shielding ceramic material, or a combination thereof, but not limited thereto. Light-shielding plastic materials include, for example, black ink, light-shielding resin, etc., but are not limited thereto. Light-shielding metal materials include, for example, chromium, molybdenum, aluminum, titanium, zinc, manganese, silver, etc., but are not limited thereto. Light-shielding ceramic materials include, for example, various metal oxides, metal nitrides, such as chromium oxide, titanium oxide, chromium nitride, titanium nitride, etc., but are not limited thereto. The image pattern layer 302 can be formed on a transparent substrate 304 using techniques such as coating, vapor deposition, sputtering, etc., with a thickness, for example, between 1 micrometer and 1000 micrometers, but not limited thereto. Then, patterning techniques such as lithography and etching are used to form the desired image pattern layer 302. This is well known to those skilled in the art, and therefore will not be described in detail.

[0087] Figure 7 This is an enlarged schematic diagram of the first sub-image unit 1310u and the second sub-image unit 1320u of the optical imaging sheet 1300 according to another embodiment of the present invention. Figure 8 This is a three-dimensional display schematic diagram of a floating display device with a wide viewing angle, according to another embodiment of the present invention. In this embodiment, as described above... Figures 1 to 6C The embodiments are similar, and the same reference numerals can be used for reference, but are not limiting. In addition to the light-blocking pattern, a light-transmitting pattern may also be used in another embodiment. Please refer to... Figure 1 , Figure 7 and Figure 8 In another embodiment, a light-transmitting optical imaging sheet 1300 can be used instead of a light-shielding optical imaging sheet 300 to achieve a different display effect.

[0088] Please refer to Figure 1 , Figure 7 and Figure 8 In this embodiment, the floating display image 1000 is illustrated using a light-transmitting "upward arrow" pattern. The optical imaging sheet 1300 of the present invention has a plurality of sub-image units 1302u arranged in an array, for example, an M×N (M>1, N>1) array of sub-image units 1302u, used to form the pattern required for the floating display image 1000a. Taking a 40×40 array of sub-image units 1302u as an example, the length and width of each sub-image unit 1302u can be, for example, 1 / 40 of the length and width of the floating display image 1000. Projection display using multiple sub-image units 1302u increases the resolution of the floating display image 1000a. Each sub-image unit 1302u corresponds to a microlens 402u, and the array of multiple sub-image units 1302u constitutes an image pattern layer 1302. The array of multiple sub-image units 1302u includes multiple first sub-image units 1310u and multiple second sub-image units 1320u, wherein the multiple second sub-image units 1320u are arranged to form an auxiliary image pattern 1330, which is an auxiliary pattern required to form a wide-viewing-angle display image.

[0089] Please refer to Figure 1 and Figure 7 Each first sub-image unit 1310u has a first main image pattern 1312, corresponding to the pattern of the floating display image 1000a. The resolution of the floating display image 1000a is increased by projecting the first main image patterns 1312 corresponding to multiple first sub-image units 1310u. Figure 7As shown, the first sub-image unit 1310u is enlarged to a 4×4 arrangement. Each first sub-image unit 1310u has a first main image pattern 1312, and the remaining peripheral portion is a first residual pattern 1316. After being enlarged to a 1×1 first sub-image unit 1310u, the first main image pattern 1312 is a light-transmitting downward arrow pattern. In this embodiment, the first main image pattern 1312 is used as an example of a light-transmitting pattern, while the remaining peripheral first residual patterns 1316 are the opposite light-blocking patterns. Therefore, the center of the projected floating display image 1000a is a light-transmitting bright upward arrow pattern, corresponding to the dark, light-blocking periphery. Figure 8 As shown. The orientation of the first main image pattern 1312 is determined by the projection system of the microlens 402u. Taking a biconvex lens as an example, since the projected image is a magnified real image, the pattern of the first main image pattern 1312 corresponding to the floating display image 1000a is an inverted downward arrow pattern, rotated 180 degrees downward along the projection plane. Therefore, the pattern of the floating display image 1000a after the projection of the first main image pattern 1312 is an upward arrow pattern. The above is only an example. Those skilled in the art can appropriately modify the projection system to make the first main image pattern 1312 an upward arrow pattern, and the pattern of the floating display image 1000a after projection corresponding to an upward arrow pattern, and are not limited thereto. This is well known to those skilled in the art, and therefore will not be elaborated further.

[0090] Please refer to Figure 1 and Figure 7 In this embodiment, each second sub-image unit 1320u has a second main image pattern 1322 and a bottom image pattern 1324, corresponding to the pattern of the floating display image 1000a. Furthermore, multiple second sub-image units 1320u are arranged to form an auxiliary image pattern 1330, such as... Figure 7 The upward arrow in the left-hand diagram represents the pattern required to form a wide-viewing-angle display image. Each second sub-image unit 1320u can have the same length and width as the first sub-image unit 1310u, and its second main image pattern 1322 can also have the same length and width as the first main image pattern 1312, but this is not limited. The first main image pattern 1312 and the second main image pattern 1322 have the same pattern, and the second main image pattern 1322 functions similarly to the first main image pattern 1312, using the second main image pattern 1322 for projection, thereby increasing the resolution of the floating display image 1000a. In this embodiment, as... Figure 7As shown, the second sub-image unit 1320u is enlarged to a 4×4 arrangement. Each second sub-image unit 1320u has a second main image pattern 1322 and a bottom image pattern 1324, with the remaining portion being the second residual pattern 1326. After further enlargement to a 1×1 second sub-image unit 1320u, the second main image pattern 1322 is a light-transmitting downward arrow pattern. The second main image pattern 1322 is similar to the first main image pattern 1312. The second main image pattern 1322 is illustrated as a light-transmitting pattern, while the surrounding second residual patterns 1326 are the opposite light-blocking patterns. Therefore, the center of the projected floating display image 1000a is a light-transmitting bright upward arrow pattern, corresponding to the surrounding dark light-blocking pattern, as shown. Figure 8 As shown. The orientation of the second main image pattern 1322 is determined by the projection system of the microlens 402u. Taking a biconvex lens as an example, since the projected image is a magnified real image, the pattern of the second main image pattern 1322 corresponding to the floating display image 1000a is an inverted downward arrow pattern, rotated 180 degrees downward along the projection plane. Therefore, the pattern of the floating display image 1000a after the second main image pattern 1322 is projected is an upward arrow pattern. The above is only an example. Those skilled in the art can appropriately modify the projection system so that the second main image pattern 1322 is an upward arrow pattern and the pattern of the floating display image 1000a after projection is an upward arrow pattern, and it is not limited to this. This is well known to those skilled in the art, so it will not be described in detail. In this embodiment, the first main image pattern 1312 and the second main image pattern 1322 have the same pattern, and after projection, the floating display image 1000a viewed from the front of the first viewing angle V1 is displayed, as shown. Figure 8 As shown.

[0091] Please refer to Figure 1 and Figure 7 In this embodiment, the bottom image pattern 1324 of the second sub-image unit 1320u is located around the second main image pattern 1322. For example, the bottom image pattern 1324 may surround the second main image pattern 1322. Figure 7 As shown, adding a bottom image pattern 1324 enhances the display effect, but is not limited to this. The bottom image pattern 1324 can, for example, only be half of the pattern, such as the right or left half, or it can be set on all four sides or four corners (not shown). By adjusting the pattern area ratio of the bottom image pattern 1324, the light transmission grayscale effect of the auxiliary image pattern 1330 can be adjusted accordingly, thus adjusting the brightness of the oblique viewing angle auxiliary display image. In this embodiment, multiple second sub-image units 1320u are arranged to form the auxiliary image pattern 1330. After projection, the auxiliary image pattern 1330 displays the auxiliary display image viewed from oblique viewing angles such as the second viewing angle V2 and the third viewing angle V3, as shown. Figure 8 As shown. In this embodiment, the second main image pattern 1322 and the bottom image pattern 1324 are illustrated as light-transmitting patterns. In addition to black and white and grayscale display, a color filter layer (not shown) can also be provided at the first main image pattern 1312, the second main image pattern 1322 and the bottom image pattern 1324 of the present invention, and together with the display light source 200 with a white light source, a color display effect can be achieved.

[0092] In addition, please refer to Figure 7 Please refer to the above. Figure 5A and 5B Each second sub-image unit 1320 may have a bottom image pattern 1324, and the bottom image pattern 1324 in each second sub-image unit 1320u surrounds the second main image pattern 1322. Therefore, the auxiliary image pattern 1330 has the highest light transmission effect, and when the auxiliary display image is viewed from an oblique angle, the image pattern has the brightest grayscale, and the display contrast with the surrounding light-blocking part is the highest. If the product needs to, the proportion of the bottom image pattern 1324 in the auxiliary image pattern 1330 can also be adjusted, thereby adjusting the grayscale display effect of the auxiliary image pattern 1330. The arrangement of the second sub-image units 1320u with the bottom image pattern 1324 can be, for example, a checkerboard arrangement, a striped staggered arrangement, a triangular staggered arrangement, a square grid staggered arrangement, a scattered staggered arrangement, etc., but is not limited to these. For detailed adjustment methods, please refer to the aforementioned information. Figure 5A and Figure 5B Explanation.

[0093] Please refer to Figure 1 , Figure 7 and Figure 8 , Figure 1 The floating display device with a wide viewing angle corresponds to Figure 8 The Chinese version only uses the key optical imaging element 1300 as a substitute. Figure 1The optical imaging sheet 1300 has a first main image pattern 1312, a second main image pattern 1322, and an auxiliary image pattern 1330. The floating display device 100 of the present invention can achieve a wide viewing angle display effect. When a user views the floating display image 1000a projected from the first main image pattern 1312 and the second main image pattern 1322 within the optical imaging sheet 1300 of the floating display device 100 from the first viewing angle V1, a good floating display image 1000a can be seen because it is within the field of view (FOV) 1200, but it is limited to the viewing angle θ1. For example, taking the vertical normal direction of the center of the plane of the optical imaging sheet 1300 as 0 degrees (not shown), the viewing angle θ1 is, for example, ±25 degrees, depending on the viewing angle limitation of the product. This viewing angle θ1 limits the user's viewing angle and also limits the application range of the product. The wide-viewing-angle floating display device 100 of the present invention further provides an auxiliary display image formed by projecting an auxiliary image pattern 1330 within the optical imaging sheet 1300, increasing the viewing angle to a viewing angle θ2, for example, ±50 degrees. This allows the user to see the auxiliary display image from both a deviated upper second viewing angle V2 (+25 degrees to +50 degrees) and a lower third viewing angle V3 (-25 degrees to -50 degrees), thus increasing the auxiliary viewing angles α1 and α2. However, the increased auxiliary display image provides a stereoscopic viewing angle; therefore, even when the user deviates from the direct first viewing angle V1, regardless of whether they are deviating vertically, horizontally, or vertically, they can still see the display image without being affected by [the visual distortion caused by the visual distortion]. Figure 8 The example provided is limited. Compared to existing technologies where only a small viewing angle θ1 of the first perspective V1 is visible, this invention provides an auxiliary display image that extends to a viewing angle θ2, adding offset viewing angles α1 and α2, allowing the user to see the auxiliary display image from both the offset second perspective V2 and the third perspective V3. Therefore, the floating display device 100 of this invention with a wide viewing angle increases the application scope of floating display technology and improves the user's viewing experience of the floating display device. The floating display image 1000a, in addition to... Figure 8 In addition to the upward arrow pattern, the optical imaging sheet 1300 can also use various other patterns, such as number patterns, direction patterns, switch patterns, text patterns, etc., to make the floating display image 1000a form a corresponding pattern, but it is not limited to these, and will not be elaborated here.

[0094] The wide-viewing-angle floating display device 100 of the present invention can be applied to various devices, such as elevator buttons, machine buttons, machine screens, etc., but is not limited thereto. Furthermore, when combined with floating touch control, it can achieve excellent floating display and touch effects. Figure 9 This is a cross-sectional schematic diagram of a floating display device according to another embodiment of the present invention. In this embodiment, as described above... Figures 1 to 8The embodiments are similar, and the same reference numerals can be used for reference, but are not limiting. In this embodiment, only elevator buttons are used as an example for illustration, and those skilled in the art can also apply them to other devices, and are not limited to the description of this embodiment.

[0095] Please refer to Figure 9 The floating display device 100a with a wide viewing angle includes at least a display light source 200, an optical imaging sheet 300, and a microlens array sheet 400. The display light source 200 may include, for example, a light-emitting diode (LED) 202 and an optical diffuser 204. The LED 202 can emit various desired colors of light, such as white, blue, green, and red, which can be adjusted according to product requirements. At least one LED 202 can be used; it can be a single LED 202 or an array of multiple LEDs 202, but is not limited to these. The optical diffuser 204 can uniformly diffuse the light provided by the LED 202 to form a planar light source, used for projecting the floating display image 1000 and an auxiliary display image with an oblique viewing angle.

[0096] Please refer to Figure 9 The optical imaging sheet 300 of the present invention can be either an optical imaging sheet 300 with a light-shielding pattern or an optical imaging sheet 1300 with a light-transmitting pattern; neither is limited. For details regarding the optical imaging sheet 300 (or optical imaging sheet 1300), please refer to the description of the foregoing embodiments, which will not be repeated here. The microlens array sheet 400 can, for example, be a biconvex lens, which can achieve a good levitation projection effect. For details regarding the microlens array sheet 400, please refer to the description of the foregoing embodiments, which will not be repeated here. A levitation display image 1000 (or levitation display image 1000a) is formed by projection imaging using the display light source 200, the optical imaging sheet 300, and the microlens array sheet 400. By appropriately adjusting the projection display system, such as the object distance and image distance, the imaging angle can be adjusted. For example, the inward angle β can be adjusted to approximately 10 degrees to 45 degrees, therefore the imaging angle γ is approximately 80 degrees to 45 degrees. By adjusting the imaging angle appropriately, the distance between the floating display image 1000 and the microlens array plate 400 can be adjusted, for example, from 0.1 cm to 20 cm, thereby adjusting the floating display projection distance. In practice, depending on the usage requirements, the floating display projection distance may be, for example, from 0.5 cm to 10 cm. The above is for illustrative purposes only and does not limit the floating display projection range.

[0097] Please refer to Figure 9When the floating display device 100a is applied to elevator buttons, it can optionally include a circuit board 600, such as a printed circuit board, positioned adjacent to the display light source 200. The light-emitting diodes 202 of the display light source 200 can be directly mounted on the circuit board 600, for example, to further reduce space usage. On the other side of the circuit board 600 opposite the light-emitting diodes 202, a connector 700 can be provided to connect the circuit board 600 to an external control circuit. Additionally, as... Figure 9 As shown, the floating display device 100a may further include a housing 810 and an inner housing 820. The display light source 200, optical imaging sheet 300, microlens array sheet 400, circuit board 600, etc., can be housed within the inner housing 820 and connected to an external circuit via a connector 700. By locking the housing 810 and inner housing 820 together, the display light source 200, optical imaging sheet 300, microlens array sheet 400, circuit board 600, etc., are sealed within the accommodating space between the housing 810 and inner housing 820. Only the transparent substrate (not shown) of the display projection window of the housing 810 is exposed, adjacent to the microlens array sheet 400. This is used to project the floating display image 1000 and an auxiliary display image at an oblique angle, thereby improving the display viewing angle and achieving a wide-viewing-angle display effect, allowing users to clearly see the auxiliary display image even at an oblique angle.

[0098] Please refer to Figure 9 The floating display device 100a may further include a touch module 500 disposed adjacent to the microlens array sheet 400, thereby constituting a floating display touch device. The touch module 500, for example, is a floating touch module with a touch sensing area 530. Combined with the floating display device 100, it can achieve a good floating display touch effect. The touch module 500 may use non-contact touch technologies such as infrared light touch technology, visible light photography analysis touch technology, and acoustic wave touch technology, which can provide a good floating touch effect and avoid the spread of germs caused by contact with object surfaces. Taking infrared light touch technology as an example, the touch module 500 may include at least an infrared light emitter 510 and an infrared light sensor 520, for example, which may be respectively disposed in the housing 810 on opposite sides adjacent to the microlens array sheet 400. Figure 9As shown. The infrared light emitter 510 and the infrared light sensor 520 can be electrically connected to the circuit board 600, for example. The emission angle range of the infrared light emitter 510 and the light reception angle range of the infrared light sensor 520 are superimposed to form a touch sensing area 530, wherein the area of ​​the touch sensing area 530 includes the floating display image 1000 (or 1000a). Part of the infrared light emitter 510 emits infrared light towards the position of the floating display image 1000. When the user's finger enters the touch sensing area 530 and approaches the floating display image 1000, the infrared light is reflected to the infrared light sensor 520, thereby sensing the user's action and achieving the function of human-machine floating touch control. In this way, when the user uses the elevator, they only need to touch the floating display image 1000 to achieve the effect of floating touch control of the elevator switch upward, without having to directly touch the elevator button. Therefore, it can avoid germs adhering to the elevator button and reduce the chance of germ transmission. Furthermore, the infrared light emitter 510 and the infrared light sensor 520 are not limited to being mounted on the housing 810. The infrared light emitter 510 can also be mounted outside the housing 810, for example, above or below the housing 810, emitting infrared light to display the image 1000 in a parallel, floating manner. This also increases the number of infrared light sensors 520 mounted on the housing 810, improving the sensitivity of touch sensing. If the infrared light sensor 520 has high sensing sensitivity and can directly sense the infrared light emitted by the user's body, the infrared light sensor 520 can be directly mounted on the housing 810, omitting the infrared light emitter 510. The above is for illustrative purposes only; those skilled in the art can make appropriate equivalent substitutions to achieve the effect of floating touch, which will not be elaborated further here.

[0099] In summary, this invention provides a floating display device that uses second sub-image units arranged to form an auxiliary image pattern. A background image pattern is added around the main image pattern of the second sub-image units to enhance the effect of the auxiliary image pattern. By providing auxiliary display images through the auxiliary image pattern, users can still see the auxiliary display images at oblique viewing angles, thereby achieving a wide-viewing-angle display effect and improving the user experience of the floating display device. Furthermore, by combining it with a touch module to form a floating display touch device with a wide viewing angle, it can further achieve floating touch human-computer interaction effects and reduce the problem of germ transmission caused by direct user contact.

[0100] The present invention has been described by the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, modifications and equivalents encompassing the spirit and scope of the claims are all included within the scope of the present invention.

Claims

1. A floating display device, characterized in that, The floating display device includes: One display light source; A microlens array sheet, corresponding to the display light source, the microlens array sheet having multiple microlenses arranged in an array; and An optical imaging sheet is disposed between the display light source and the microlens array sheet. The optical imaging sheet has a plurality of sub-image units arranged in an array, each sub-image unit corresponding to a microlens. The sub-image units include: Multiple first sub-image units, each of the first sub-image units having a first main image pattern; and Multiple second sub-image units, each of the second sub-image units having a second main image pattern, the first main image pattern having the same pattern as the second main image pattern, wherein the second sub-image units are arranged to form an auxiliary image pattern, at least some of the second sub-image units each having a bottom image pattern, and the bottom image pattern being located around the second main image pattern; The first main image pattern and the auxiliary image pattern have the same pattern.

2. The floating display device as described in claim 1, characterized in that, The display light source includes at least one light-emitting diode and an optical diffuser.

3. The floating display device as described in claim 1, characterized in that, The microlens includes a biconvex microlens.

4. The floating display device as described in claim 1, characterized in that, The first main image pattern, the second main image pattern, and the bottom image pattern each include a light-blocking pattern.

5. The floating display device as described in claim 1, characterized in that, The first main image pattern, the second main image pattern, and the bottom image pattern each include a light-transmitting pattern.

6. The floating display device as described in claim 1, characterized in that, The bottom image pattern surrounds the second main image pattern.

7. The floating display device as described in claim 1, characterized in that, Each of the second sub-image units has the base image pattern.

8. The floating display device as described in claim 1, characterized in that, The arrangement of some of the second sub-image units having the underlying image pattern includes a checkerboard pattern.

9. The floating display device as described in claim 1, characterized in that, The optical imaging sheet further includes a transparent substrate, on which the sub-image units arranged in an array are disposed.

10. The floating display device as claimed in claim 1, characterized in that, The display light source, the optical imaging sheet, and the microlens array sheet project an image to form a floating display image.

11. The floating display device as claimed in claim 10, characterized in that, It also includes a touch module disposed adjacent to the microlens array sheet, the touch module having a touch sensing area, the range of which includes the floating display image.

12. The floating display device as claimed in claim 11, characterized in that, The touch module includes an infrared light emitter and an infrared light sensor, which are located on both sides of the microlens array sheet.

13. A floating display touch device, characterized in that, The floating display touch device includes: One display light source; A microlens array sheet, corresponding to the display light source, has multiple microlenses arranged in an array; A touch module is disposed adjacent to the microlens array sheet; and An optical imaging sheet is disposed between the display light source and the microlens array sheet. The optical imaging sheet has a plurality of sub-image units arranged in an array, each sub-image unit corresponding to a microlens. The sub-image units include: Multiple first sub-image units, each of the first sub-image units having a first main image pattern; and Multiple second sub-image units, each of the second sub-image units having a second main image pattern, the first main image pattern having the same pattern as the second main image pattern, wherein the second sub-image units are arranged to form an auxiliary image pattern, at least some of the second sub-image units each having a bottom image pattern, and the bottom image pattern being located around the second main image pattern; The first main image pattern and the auxiliary image pattern have the same pattern.

14. The floating display touch device as described in claim 13, characterized in that, The first main image pattern, the second main image pattern, and the bottom image pattern each include a light-blocking pattern.

15. The floating display touch device as described in claim 13, characterized in that, The first main image pattern, the second main image pattern, and the bottom image pattern each include a light-transmitting pattern.

16. The floating display touch device as described in claim 13, characterized in that, The bottom image pattern surrounds the second main image pattern.

17. The floating display touch device as described in claim 13, characterized in that, Each of the second sub-image units has the base image pattern.

18. The floating display touch device as described in claim 13, characterized in that, The arrangement of some of the second sub-image units having the underlying image pattern includes a checkerboard pattern.

19. The floating display touch device as described in claim 13, characterized in that, The optical imaging sheet further includes a transparent substrate, on which the arrayed sub-image units are disposed.

20. The floating display touch device as described in claim 13, characterized in that, The display light source, the optical imaging sheet, and the microlens array sheet project an image to form a floating display image.

21. The floating display touch device as described in claim 20, characterized in that, The touch module has a touch sensing area that includes the floating display image.

22. The floating display touch device as described in claim 13, characterized in that, The touch module includes an infrared light emitter and an infrared light sensor, which are located on both sides of the microlens array sheet.

Images