Floating imaging display device

Abstract

The invention discloses a floating imaging display device. The floating imaging display device comprises a light source module, a periodic optical structure and a barrier layer, the light source module is used for generating light. The periodic optical structure includes a plurality of lenses arranged adjacent to each other, and the light passes through the periodic optical structure and generates at least one floating image. The barrier layer is used for blocking or absorbing part of light, and the barrier layer is arranged between any two adjacent lenses of the periodic optical structure. The light emitting angle of the other part of light which is not blocked or absorbed by the blocking layer is between alpha and beta, and the following condition is met: alpha = tan-1 (d / h); and beta = 2tan-1 (d / 2h), where alpha is a lateral view angle, beta is a positive view angle, d is the maximum width of the light through hole corresponding to each lens, and h is the distance from the light source module to the light through hole.

Description

Technical Field

[0001] The invention relates to a floating imaging display device. Background Art

[0002] Three-dimensional imaging technology is to present the three-dimensional image of an object in a three-dimensional space, which can bring a real three-dimensional visual experience to the viewer. Today's three-dimensional imaging technology includes three-dimensional projection, volumetric stereoscopic image display and holographic projection. Among them, three-dimensional projection technology uses parallel projection and / or perspective projection to project the three-dimensional image of an object on a two-dimensional plane. Volumetric stereoscopic image display technology uses a light source such as laser to illuminate a high-speed rotating turntable, and uses the scattering phenomenon of light to display each point of a three-dimensional object in three-dimensional space to form a three-dimensional image. Holographic projection technology is a virtual imaging technology that can reproduce the three-dimensional image of an object. It uses the principles of light interference and diffraction to record information at all angles of the object, and forms a three-dimensional image by projecting light onto a transparent film or lens of a special material.

[0003] Optical floating display technology uses floating lenses to refract and bend light, projecting images to specific locations, creating a visual effect that appears to be floating in the air. However, when the light source passes through the ineffective area of ​​the floating lens, it is easy to cause stray light. Stray light will affect the sharpness of the floating 3D imaging, blur the edges of the floating 3D imaging, and cause the image quality to deteriorate. Summary of the invention

[0004] The present invention provides a floating imaging display device, which is used to solve the problem in the prior art that stray light affects the sharpness of floating stereoscopic imaging, blurs the edge of the floating stereoscopic imaging, and causes the image quality to deteriorate.

[0005] A floating imaging display device disclosed in one embodiment of the present invention includes a light source module, a periodic optical structure, and a blocking layer. The light source module is used to generate light. The periodic optical structure includes a plurality of lenses arranged adjacent to each other, and the light passes through the periodic optical structure and generates at least one floating image. The blocking layer is used to block or absorb part of the light, and the blocking layer is disposed between any two adjacent lenses of the periodic optical structure. Among them, the light output angle of the other part of the light that is not blocked or absorbed by the blocking layer is between α and β, which satisfies the following conditions:

[0006] α=tan -1 (d / h); and

[0007] β=2tan -1 (d / 2h),

[0008] Wherein α is the lateral viewing angle, β is the front viewing angle, d is the maximum width of the light-through hole corresponding to each lens, and h is the distance from the light source module to the light-through hole.

[0009] According to the floating imaging display device disclosed in the above-mentioned embodiment, a blocking layer is disposed between any two adjacent lenses of the periodic optical structure, and the blocking layer is utilized to absorb or block stray light, so as to eliminate unnecessary stray light and retain the required imaging light, thereby preventing the stray light from gathering in the imaging area and affecting the display effect, thereby achieving the purpose of anti-crosstalk, and being used to reduce the intensity of stray light to purify the light, thereby improving the sharpness and display quality of floating stereoscopic imaging.

[0010] The above description of the content of the present invention and the following description of the embodiments are used to demonstrate and explain the principles of the present invention, and to provide a further explanation of the scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of a floating imaging display device according to a first embodiment of the present invention;

[0012] Figure 2 for Figure 1 A partial schematic diagram of a floating imaging display device;

[0013] Figure 3 A schematic diagram of a floating imaging display device according to a second embodiment of the present invention;

[0014] Figure 4 A schematic diagram of a floating imaging display device according to a third embodiment of the present invention;

[0015] Figure 5 A schematic diagram of a floating imaging display device according to a fourth embodiment of the present invention;

[0016] Figure 6 is a schematic diagram of a floating imaging display device according to a fifth embodiment of the present invention;

[0017] Figure 7 It is a schematic diagram of a floating imaging display device according to a sixth embodiment of the present invention.

[0018] Explanation of symbols

[0019] 1,1b,1c,1d,1e,1f: Floating imaging display device

[0020] 10,10b,10c,10d,10e,10f: Light source module

[0021] 20,20d,20e,20f: Periodic optical structures

[0022] 21,21b,21c,21d,21e,21f: Lens

[0023] 30,30b,30c,30d,30e,30f: Barrier layer

[0024] M: Floating Image

[0025] LD: light emission direction

[0026] L1, L2, L3: Length

[0027] ST: Clearance hole

[0028] α: Side view

[0029] β: Positive viewing angle

[0030] d: maximum width

[0031] h: distance DETAILED DESCRIPTION

[0032] The detailed features and advantages of the embodiments of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable any person with ordinary knowledge in the art to understand the technical contents of the embodiments of the present invention and implement them accordingly. According to the contents disclosed in this specification, the claims and the drawings, any person with ordinary knowledge in the art can understand the relevant purposes and advantages of the present invention. The following embodiments further illustrate the present invention in detail, but are not intended to limit the scope of the present invention in any way.

[0033] Please refer to Figure 1 and Figure 2 ,in Figure 1 is a schematic diagram of a floating imaging display device according to a first embodiment of the present invention, and Figure 2 for Figure 1 A partial schematic diagram of a floating imaging display device.

[0034] The floating imaging display device 1 of the present embodiment is used, for example, to generate a floating image M, and the floating imaging display device 1 may include a light source module 10 , a periodic optical structure 20 , and a blocking layer 30 .

[0035] The light source module 10 is used to generate light, and the light source module 10 may include, for example, a light emitting diode (LED), a quantum dot (quantum dot), an organic light emitting diode (OLED) or other similar light sources.

[0036] The periodic optical structure 20 may include a plurality of lenses 21 arranged adjacent to each other, and the lenses 21 are spaced apart from each other. Light passes through the lenses 21 of the periodic optical structure 20 and generates at least one floating image M. The lenses 21 may be, for example, spherical lenses, aspherical lenses, free-form lenses, or hemispherical lenses, but the present invention is not limited thereto.

[0037] The blocking layer 30 is used to block or absorb part of the light (such as unwanted large-angle light, such as Figure 1 The blocking layer 30 is disposed between any two adjacent lenses 21 of the periodic optical structure 20, and the blocking layer 30 and the lenses 21 at least partially overlap in a direction perpendicular to the light emitting direction LD. In this embodiment, the lenses 21 may be at least partially separated from each other by the blocking layer 30 and are not connected to each other.

[0038] The barrier layer 30 and the lens 21 at least partially overlap in a direction perpendicular to the light emitting direction LD. Figure 2 , the ratio of the length L1 of the barrier layer 30 parallel to the light emitting direction LD to the length L2 of the overlapping region of the barrier layer 30 and the lens 21 parallel to the light emitting direction LD may be 1:1, and the ratio of the length L2 of the overlapping region of the barrier layer 30 and the lens 21 parallel to the light emitting direction LD to the length L3 of the lens 21 parallel to the light emitting direction LD may be between 1:1 and 1:2. The overlapping region of the barrier layer and the lens refers to the region where the barrier layer and the lens overlap each other perpendicular to the light emitting direction.

[0039] The light transmittance of the barrier layer 30 may be less than 30%, and the barrier layer 30 may be made of dark plastic material, dark photoresist or metal, but the present invention is not limited thereto. In this embodiment, the cross-section of the barrier layer 30 parallel to the light output direction LD is, for example, a rectangular shape.

[0040] Another portion of light (such as Figure 1 The light emitting angle of the light (shown as a solid single arrow in FIG. 1 ) is between α and β, which satisfies the following condition: α = tan -1 (d / h); and β = 2tan -1(d / 2h), where α is the lateral viewing angle, β is the front viewing angle, d is the maximum width of the light hole ST corresponding to each lens 21, and h is the distance from the light source module 10 to the light hole ST. For example, in the present embodiment, the maximum width d of the light hole ST corresponding to each lens 21 is 0.2 mm, and the distance h from the light source module 10 to the light hole ST is 0.2 mm. Based on the above conditions, it can be calculated that the lateral viewing angle α is 45 degrees, and the front viewing angle β is 53.13 degrees. It can be seen that the light output angle of the other part of the light that is not blocked or absorbed by the blocking layer 30 is between 45 degrees and 53.13 degrees. In the present embodiment, the light hole ST is an opening formed by the blocking layer 30 adjacent to the light source module 10. In addition, the shape of the light hole ST can be any shape, such as a circle, a rectangle, etc., and the present invention is not limited thereto.

[0041] Through simulation calculation, compared with the existing display device without a blocking layer, the floating imaging display device 1 of the present embodiment utilizes the blocking layer 30 to absorb or block stray light, for example, it can reduce the intensity of stray light by more than 80%, while retaining the required imaging light, eliminating a large amount of unnecessary stray light, and avoiding the stray light from gathering in the imaging area and affecting the display effect, thereby achieving the purpose of anti-crosstalk, purifying the light, thereby improving the sharpness and display quality of the floating three-dimensional imaging, which can be conducive to displaying more complex patterns.

[0042] In order to prevent large-angle light (stray light) from affecting the imaging quality, the floating imaging display device 1 of this embodiment sets a blocking layer 30 in a specific range between adjacent lenses 21 according to the light aperture of each lens 21 and the distance from the light source module 10 to the light aperture ST, so as to absorb or block large-angle light (stray light) outside the specific angle range. The specific range between adjacent lenses 21 may refer to a specific position and / or length, for example, the blocking layer 30 needs to be set at a specific position between adjacent lenses 21 and the blocking layer 30 needs to extend a specific length between adjacent lenses 21.

[0043] The barrier layer 30 and the lens 21 of the present embodiment can be manufactured by screen printing, etching, injection, laser, mesh, yellow light manufacturing process, etc., but the present invention is not limited thereto.

[0044] In one embodiment, the lens 21 and the barrier layer 30 can be manufactured, for example, by an injection molding process. Specifically, a mold core is first processed to form an injection mold core, and a double-channel mold is manufactured, wherein the double-channel mold includes a barrier layer injection port and a lens injection port. Next, the barrier layer is injected through the barrier layer injection port, and then the lens is injected through the lens injection port. Finally, the molded barrier layer and lens are demolded, thereby completing the manufacture of the lens and the barrier layer.

[0045] In this embodiment, the cross section of the blocking layer 30 parallel to the light emitting direction LD is a rectangular shape, but the present invention is not limited thereto. In other embodiments, the cross section of the blocking layer parallel to the light emitting direction may be a shape other than a rectangle, such as a square, a trapezoid, a polygon or a combination thereof.

[0046] In this embodiment, the barrier layer 30 is spaced apart from the light source module 10, so that the barrier layer 30 is not in physical contact with the light source module 10, but the present invention is not limited thereto. In other embodiments, the barrier layer may be disposed on the light source module, so that the barrier layer is in physical contact with the light source module.

[0047] In this embodiment, the lenses 21 of the periodic optical structure 20 are arranged at intervals, so that the lenses 21 are not physically in contact with each other, but the present invention is not limited thereto. In other embodiments, the lenses of the periodic optical structure can be arranged in connection with each other, so that adjacent lenses are physically in contact with each other.

[0048] In this embodiment, the ratio of the length L1 of the barrier layer 30 parallel to the light emitting direction LD to the length L2 of the overlapping area of ​​the barrier layer 30 and the lens 21 parallel to the light emitting direction LD may be 1:1, but the present invention is not limited thereto. In other embodiments, the ratio of the length of the barrier layer parallel to the light emitting direction to the length of the overlapping area of ​​the barrier layer and the lens parallel to the light emitting direction may be 20:1 to 1:1. In some embodiments, the ratio of the length of the barrier layer parallel to the light emitting direction to the length of the overlapping area of ​​the barrier layer and the lens parallel to the light emitting direction may also be 2:1 to 1:1.

[0049] In this embodiment, the ratio of the length L2 of the overlapping area of ​​the barrier layer 30 and the lens 21 in the direction parallel to the light emitting direction LD to the length L3 of the lens 21 in the direction parallel to the light emitting direction LD may be between 1:1 and 1:2, but the present invention is not limited thereto. In other embodiments, the ratio of the length of the overlapping area of ​​the barrier layer and the lens in the direction parallel to the light emitting direction to the length of the lens in the direction parallel to the light emitting direction may be 1:1 to 1:20. In some embodiments, the ratio of the length of the overlapping area of ​​the barrier layer and the lens in the direction parallel to the light emitting direction to the length of the lens in the direction parallel to the light emitting direction may be 1:1 to 1:2.

[0050] In this embodiment, the length L1 of the blocking layer 30 parallel to the light emitting direction LD is less than the length L3 of the lens 21 parallel to the light emitting direction LD, but the present invention is not limited thereto. In other embodiments, the length of the blocking layer parallel to the light emitting direction may be greater than the length of the lens parallel to the light emitting direction.

[0051] Please refer to Figure 3 , is a schematic diagram of a floating imaging display device according to a second embodiment of the present invention. Figure 3 ) and the floating imaging display device 1b described above Figure 1 The floating imaging display device 1 is similar to the above, and the same or similar reference numerals are used to represent the same elements. The functions and effects of each element are the same as those described above, and will not be repeated here.

[0052] The shape of the cross section of the barrier layer 30b parallel to the light emitting direction LD of the present embodiment is a combination of two trapezoids, and the width of the cross section may first gradually shrink and then gradually expand along the light emitting direction LD. Among them, the portion of the barrier layer 30b that is closer to the light source module 10b and has a regular trapezoidal shape can be regarded as a lower barrier layer, and the portion that is farther away from the light source module 10b and has an inverted trapezoidal shape can be regarded as an upper barrier layer. The lower barrier layer can control the light emitting angle, and the upper barrier layer can absorb the reflected light from the lower barrier layer. In addition, the barrier layer 30b is disposed on the light source module 10b, so that the barrier layer 30b is in physical contact with the light source module 10b. Moreover, the length L1 of the barrier layer 30b parallel to the light emitting direction LD may be greater than the length L3 of the lens 21b parallel to the light emitting direction LD.

[0053] The barrier layer 30b and the lens 21b at least partially overlap in a direction perpendicular to the light emitting direction LD. In this embodiment, the ratio of the length L1 of the barrier layer 30b in parallel to the light emitting direction LD to the length L2 of the overlapping region of the barrier layer 30b and the lens 21b in parallel to the light emitting direction LD may be between 2:1 and 1:1, and the ratio of the length L2 of the overlapping region of the barrier layer 30b and the lens 21b in parallel to the light emitting direction LD to the length L3 of the lens 21b in parallel to the light emitting direction LD may be between 1:1 and 1:2. The overlapping region of the barrier layer and the lens refers to the region where the barrier layer and the lens overlap each other in a direction perpendicular to the light emitting direction.

[0054] Through simulation calculation, compared with the existing display device without a blocking layer, the floating imaging display device 1b of the present embodiment utilizes the blocking layer 30b to absorb or block stray light, for example, it can reduce the intensity of stray light by more than 90%, while retaining the required imaging light, eliminating a large amount of unnecessary stray light, and avoiding the stray light from gathering in the imaging area and affecting the display effect, thereby achieving the purpose of anti-crosstalk, purifying the light, thereby improving the sharpness and display quality of the floating three-dimensional imaging, which can be beneficial for displaying more complex patterns.

[0055] The barrier layer 30b and the lens 21b of the present embodiment can be manufactured by screen printing, etching, injection, laser, mesh, yellow light manufacturing process, etc., but the present invention is not limited thereto.

[0056] In one embodiment, the lens 21b and the blocking layer 30b can be manufactured by, for example, a printing process. Specifically, for example, the lens is first manufactured by, for example, a photolithography process, precision machining and etching, nanoimprinting or 3D printing, and then a material with a transmittance of less than 30% is applied between the lenses by a high-precision ink jet printer (IJP), and the material is cured to form a blocking layer. Therefore, the material with a transmittance of less than 30% can block or absorb stray light to improve the imaging quality.

[0057] Please refer to Figure 4 , is a schematic diagram of a floating imaging display device according to a third embodiment of the present invention. Figure 4 ) and the floating imaging display device 1c described above Figure 1 The floating imaging display device 1 is similar to the above, and the same or similar reference numerals are used to represent the same elements. The functions and effects of each element are the same as those described above, and will not be repeated here.

[0058] The barrier layer 30c of this embodiment is disposed on the light source module 10c, so that the barrier layer 30c is in physical contact with the light source module 10c. In addition, the length L1 of the barrier layer 30c parallel to the light emitting direction LD is greater than the length L3 of the lens 21c parallel to the light emitting direction LD.

[0059] The barrier layer 30c and the lens 21c at least partially overlap in a direction perpendicular to the light emitting direction LD. In this embodiment, the ratio of the length L1 of the barrier layer 30c in parallel to the light emitting direction LD to the length L2 of the overlapping region of the barrier layer 30c and the lens 21c in parallel to the light emitting direction LD may be between 3:1 and 1:1, and the ratio of the length L2 of the overlapping region of the barrier layer 30c and the lens 21c in parallel to the light emitting direction LD to the length L3 of the lens 21c in parallel to the light emitting direction LD may be between 1:1 and 1:2. The overlapping region of the barrier layer and the lens refers to the region where the barrier layer and the lens overlap each other in a direction perpendicular to the light emitting direction.

[0060] Through simulation calculation, compared with the existing display device without a blocking layer, the floating imaging display device 1c of the present embodiment utilizes the blocking layer 30c to absorb or block stray light, which can reduce the intensity of stray light by, for example, more than 80%, while retaining the required imaging light and eliminating a large amount of unnecessary stray light, thereby preventing the stray light from gathering in the imaging area and affecting the display effect, achieving the purpose of anti-crosstalk, purifying the light, thereby improving the sharpness and display quality of the floating three-dimensional imaging, and facilitating the display of more complex patterns.

[0061] The barrier layer 30c and the lens 21c of the present embodiment can be manufactured by screen printing, etching, injection, laser, mesh, yellow light manufacturing process, etc., but the present invention is not limited thereto.

[0062] In one embodiment, the lens 21c and the barrier layer 30c can be manufactured, for example, by a yellow light manufacturing process. For example, first, a low-light-transmittance material for forming a barrier layer is coated on the light source module, and then a negative film or photomask with a desired pattern or structure is used to block part of the low-light-transmittance material, and then a specific light source is used to irradiate the low-light-transmittance material in the exposure area. Afterwards, the low-light-transmittance material is developed to retain only the low-light-transmittance material with the desired pattern or structure, thereby forming a barrier layer. Then, the lens material is coated on the barrier layer and the light source module and between the barrier layers, and then a negative film or photomask with a desired pattern or structure is used to block part of the lens material, and then a specific light source is used to irradiate the lens material in the exposure area. Afterwards, the lens material is developed to retain only the lens material with the desired pattern or structure, thereby forming a lens between the barrier layers.

[0063] Please refer to Figure 5 , is a schematic diagram of a floating imaging display device according to a fourth embodiment of the present invention. Figure 5 ) and the floating imaging display device 1d described above Figure 1 The floating imaging display device 1 is similar to the above, and the same or similar reference numerals are used to represent the same elements. The functions and effects of each element are the same as those described above, and will not be repeated here.

[0064] The shape of the cross section of the blocking layer 30d of this embodiment parallel to the light emitting direction LD may be an inverted trapezoid, and the width of the cross section gradually expands along the light emitting direction LD, so that the angle change of the blocking layer 30d can be controlled, thereby limiting the angle of light emission, so as to achieve the effect of filtering out stray light, thereby improving the sharpness of the floating image. In addition, the blocking layer 30d can be arranged on the light source module 10d, so that the blocking layer 30d is in physical contact with the light source module 10d. Moreover, the lenses 21d of the periodic optical structure 20d are arranged to be connected to each other, and at least some adjacent lenses 21d can be in physical contact with each other. Furthermore, the length L1 of the blocking layer 30d parallel to the light emitting direction LD is greater than the length L3 of the lens 21d parallel to the light emitting direction LD.

[0065] The barrier layer 30d and the lens 21d at least partially overlap in a direction perpendicular to the light emitting direction LD. In this embodiment, the ratio of the length L1 of the barrier layer 30d in parallel to the light emitting direction LD to the length L2 of the overlapping region of the barrier layer 30d and the lens 21d in parallel to the light emitting direction LD may be between 3:1 and 1:1, and the ratio of the length L2 of the overlapping region of the barrier layer 30d and the lens 21d in parallel to the light emitting direction LD to the length L3 of the lens 21d in parallel to the light emitting direction LD may be between 1:1 and 1:3. The overlapping region of the barrier layer and the lens refers to the region where the barrier layer and the lens overlap each other in a direction perpendicular to the light emitting direction.

[0066] Through simulation calculation, compared with the existing display device without a blocking layer, the floating imaging display device 1d of the present embodiment utilizes the blocking layer 30d to absorb or block stray light, which can reduce the intensity of stray light by, for example, more than 80%, while retaining the required imaging light and eliminating a large amount of unnecessary stray light, thereby preventing the stray light from gathering in the imaging area and affecting the display effect, achieving the purpose of anti-crosstalk, purifying the light, thereby improving the sharpness and display quality of the floating stereoscopic imaging, and facilitating the display of more complex patterns.

[0067] The barrier layer 30d and the lens 21d of the present embodiment can be manufactured by screen printing, etching, injection, laser, mesh, yellow light manufacturing process, etc., but the present invention is not limited thereto.

[0068] In one embodiment, the lens 21d and the barrier layer 30d can be manufactured by, for example, a yellow light manufacturing process. For specific examples, please refer to the corresponding content of the third embodiment.

[0069] Please refer to Figure 6 , is a schematic diagram of a floating imaging display device according to a fifth embodiment of the present invention. Figure 6 ) and the floating imaging display device 1e described above Figure 1 The floating imaging display device 1 is similar to the above, and the same or similar reference numerals are used to represent the same elements. The functions and effects of each element are the same as those described above, and will not be repeated here.

[0070] The shape of the cross section of the blocking layer 30e of this embodiment parallel to the light emitting direction LD may be a right trapezoid, and the width of the cross section gradually decreases along the light emitting direction LD, so that the angle change of the trapezoid of the blocking layer 30e can be used to control the angle of light emission, thereby achieving the purpose of controlling the light emitting angle and suppressing stray light to enhance the sharpness of the floating image. In addition, the blocking layer 30e is disposed on the light source module 10e, so that the blocking layer 30e is in physical contact with the light source module 10e. Moreover, the lenses 21e of the periodic optical structure 20e are connected to each other, and at least some of the adjacent lenses 21e may be in physical contact with each other. Furthermore, the length L1 of the blocking layer 30e parallel to the light emitting direction LD is greater than the length L3 of the lens 21e parallel to the light emitting direction LD.

[0071] The barrier layer 30e and the lens 21e at least partially overlap in a direction perpendicular to the light emitting direction LD. In this embodiment, the ratio of the length L1 of the barrier layer 30e in parallel to the light emitting direction LD to the length L2 of the overlapping region of the barrier layer 30e and the lens 21e in parallel to the light emitting direction LD may be between 3:1 and 1:1, and the ratio of the length L2 of the overlapping region of the barrier layer 30e and the lens 21e in parallel to the light emitting direction LD to the length L3 of the lens 21e in parallel to the light emitting direction LD may be between 1:1 and 1:3. The overlapping region of the barrier layer and the lens refers to the region where the barrier layer and the lens overlap each other in a direction perpendicular to the light emitting direction.

[0072] Through simulation calculation, compared with the existing display device without a blocking layer, the floating imaging display device 1e of the present embodiment utilizes the blocking layer 30e to absorb or block stray light, which can reduce the intensity of stray light by, for example, more than 80%, while retaining the required imaging light and eliminating a large amount of unnecessary stray light, thereby preventing the stray light from gathering in the imaging area and affecting the display effect, achieving the purpose of anti-crosstalk, purifying the light, and thus improving the sharpness and display quality of the floating three-dimensional imaging, which can facilitate the display of more complex patterns.

[0073] The barrier layer 30e and the lens 21e of the present embodiment can be manufactured by screen printing, etching, injection, laser, mesh, yellow light manufacturing process, etc., but the present invention is not limited thereto.

[0074] In one embodiment, the lens 21e and the barrier layer 30e can be manufactured by, for example, a yellow light manufacturing process. Specific examples can refer to the corresponding content of the third embodiment.

[0075] Please refer to Figure 7 , is a schematic diagram of a floating imaging display device according to a sixth embodiment of the present invention. Figure 7 ) and the floating imaging display device 1f as described above Figure 1The floating imaging display device 1 is similar to the above, and the same or similar reference numerals are used to represent the same elements. The functions and effects of each element are the same as those described above, and will not be repeated here.

[0076] The blocking layer 30f of the present embodiment extends from between two adjacent lenses 21f in a direction away from the light source module 10f and exceeds the periodic optical structure 20f.

[0077] The barrier layer 30f and the lens 21f at least partially overlap in a direction perpendicular to the light emitting direction LD. In this embodiment, the ratio of the length L1 of the barrier layer 30f in parallel to the light emitting direction LD to the length L2 of the overlapping region of the barrier layer 30f and the lens 21f in parallel to the light emitting direction LD may be between 2:1 and 1:1, and the ratio of the length L2 of the overlapping region of the barrier layer 30f and the lens 21f in parallel to the light emitting direction LD to the length L3 of the lens 21f in parallel to the light emitting direction LD may be between 1:1 and 1:3. The overlapping region of the barrier layer and the lens refers to the region where the barrier layer and the lens overlap each other in a direction perpendicular to the light emitting direction.

[0078] Through simulation calculation, compared with the existing display device without a blocking layer, the floating imaging display device 1f of the present embodiment utilizes the blocking layer 30f to absorb or block stray light, which can reduce the intensity of stray light by, for example, more than 90%, while retaining the required imaging light and eliminating a large amount of unnecessary stray light, thereby preventing the stray light from gathering in the imaging area and affecting the display effect, achieving the purpose of anti-crosstalk, purifying the light, and thus improving the sharpness and display quality of the floating three-dimensional imaging, which can facilitate the display of more complex patterns.

[0079] The barrier layer 30f and the lens 21f of the present embodiment can be manufactured by screen printing, etching, injection, laser, web stretching, yellow light manufacturing process, etc., but the present invention is not limited thereto.

[0080] In one embodiment, the lens 21f and the barrier layer 30f can be manufactured by, for example, photomask alignment and laser etching. Specifically, for example, a low light transmittance material for forming the barrier layer is firstly laser-drilled by photomask alignment, then the lens is manufactured by, for example, photolithography, precision machining and etching, nanoimprinting or 3D printing, and finally the barrier layer and the lens are bonded by alignment bonding.

[0081] According to the floating imaging display device of the above embodiment, a blocking layer is arranged between any two adjacent lenses of the periodic optical structure, and the blocking layer is used to absorb or block stray light, so as to eliminate unnecessary stray light and retain the required imaging light, thereby avoiding the stray light from gathering in the imaging area and affecting the display effect, thereby achieving the purpose of anti-crosstalk, and being used to reduce the intensity of stray light to purify the light, thereby improving the sharpness and display quality of floating three-dimensional imaging.

[0082] Although the present invention is disclosed as above by embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims and their equivalents.

Claims

1. A floating imaging display device, comprising: A light source module, for generating light; A periodic optical structure includes a plurality of lenses arranged adjacent to each other, and the light passes through the periodic optical structure and generates at least one floating image; as well as A blocking layer, used to block or absorb part of the light, and the blocking layer is disposed between any two adjacent lenses of the periodic optical structure; The light-emitting angle of another part of the light that is not blocked or absorbed by the blocking layer is between α and β, which satisfies the following conditions: α=tan -1 (d / h); and β❝2 tan -1 (d / 2h), Wherein, α is the lateral viewing angle, β is the front viewing angle, d is the maximum width of the light-through hole corresponding to each lens, and h is the distance from the light source module to the light-through hole. 2 . The floating imaging display device as claimed in claim 1 , wherein the light transmittance of the blocking layer is less than 30%. 3 . The floating imaging display device as claimed in claim 2 , wherein the cross-section of the blocking layer parallel to the light emitting direction has a shape including a rectangle, a square, a trapezoid, a polygon or a combination thereof. 4 . The floating imaging display device as claimed in claim 1 , wherein the lenses include spherical lenses, aspherical lenses, free-form surface lenses or hemispherical lenses. 5 . The floating imaging display device as claimed in claim 1 , wherein the blocking layer and the lenses at least partially overlap in a direction perpendicular to the light emitting direction.

6. The floating imaging display device as claimed in claim 5, wherein the ratio of the length of the overlapping area of ​​the blocking layer and the lenses parallel to the light emitting direction to the length of the lenses parallel to the light emitting direction is 1:1 to 1:

20.

7. The floating imaging display device as claimed in claim 6, wherein the ratio of the length of the overlapping area of ​​the blocking layer and the lenses parallel to the light emitting direction to the length of the lenses parallel to the light emitting direction is 1:1 to 1:

2.

8. The floating imaging display device as claimed in claim 5, wherein the ratio of the length of the blocking layer parallel to the light emitting direction to the length of the overlapping area of ​​the blocking layer and the lenses parallel to the light emitting direction is 20:1 to 1:

1.

9. The floating imaging display device as claimed in claim 8, wherein the ratio of the length of the blocking layer parallel to the light emitting direction to the length of the overlapping area of ​​the blocking layer and the lenses parallel to the light emitting direction is 2:1 to 1:

1. 10 . The floating imaging display device as claimed in claim 1 , wherein the lenses are spaced apart from each other, or the lenses are connected to each other. 11 . The floating imaging display device as claimed in claim 1 , wherein a length of the blocking layer parallel to the light emitting direction is greater than a length of the lenses parallel to the light emitting direction. 12 . The floating imaging display device as claimed in claim 1 , wherein the blocking layer is disposed on the light source module.

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