Stereoscopic projection imaging system and micro imaging device and micro imaging device

Abstract

The present invention relates to a stereoscopic projection imaging system and a micro-imaging device, comprising a micro-image layer, a transparent spacer layer, and a micro-focusing element layer. The micro-image layer includes: a shielding area; a micro-image geometric surface element area, which provides a geometric plane pattern of an image to be projected, and the micro-image geometric surface element area includes a plurality of arrayed micro-image geometric surface element units; and a grayscale micro-image area, which provides an auxiliary projection pattern of the image to be projected, and the grayscale micro-image area includes a plurality of arrayed grayscale micro-image units. The grayscale micro-image units cooperate with the micro-image geometric surface units to form a sub-stereoscopic micro-image imaging unit. The stereoscopic projection image includes a geometric plane pattern and an auxiliary projection pattern, and the auxiliary projection pattern is located on one side of the geometric plane pattern and / or in a blank area within it. The brightness of the grayscale micro-image area is lower than that of the micro-image geometric surface element area. By combining the geometric plane pattern and the auxiliary projection pattern in light and dark, a stereoscopic projection pattern is obtained, which has high clarity and a strong three-dimensional effect.

Description

Technical Field

[0001] The present invention relates to the technical field of optical projection imaging, and in particular to a projection imaging device with a visual stereoscopic effect. Background Art

[0002] As a new optoelectronic display technology, projection imaging has been a key component of modern flat-panel display technology since the 1990s, particularly with the application of thin-film transistor liquid crystals (TFT-LCDs) from Epson (Japan) and digital micromirror devices from Texas Instruments (US). Traditional projection displays are typically single-channel, using a single optical lens to project an image on electronic or film. Advances in micro-nanofabrication technology have led to the emergence of multi-channel array projectors. Compared to traditional single-channel projectors, multi-channel array projectors offer advantages such as reduced optical loss, a wide projection depth range, and high integration. Short-range projection systems can be used on the side of a car to welcome guests, with automotive welcome carpet lighting solutions already in mass production. These systems can also be used on the front and rear of a car as warning systems or for desktop projection, such as for keyboard images.

[0003] However, existing projections based on micro-nano processing technology are mostly two-dimensional projections, lacking a sense of three-dimensionality and resulting in poor visual experience. Summary of the Invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the technical defects in the prior art that projections based on micro-nano processing technology are mostly two-dimensional projections, lack of three-dimensional sense, and poor visual experience.

[0005] To solve the above technical problems, the present invention provides a stereoscopic projection imaging system, comprising a micro-image layer, a transparent spacer layer, and a micro-focusing element layer arranged in sequence, wherein the micro-image layer comprises:

[0006] The occlusion area provides a projection background for stereoscopic projection imaging;

[0007] A micro-image geometrical element region, which provides a geometrical plane pattern of an image to be projected, wherein the micro-image geometrical element region includes a plurality of micro-image geometrical element units arranged in an array;

[0008] A grayscale micro-image area, which provides an auxiliary projection pattern of the image to be projected, the grayscale micro-image area including a plurality of grayscale micro-image units arranged in an array, the grayscale micro-image units corresponding to the micro-image geometric surface units, and cooperating with the micro-image geometric surface units to form a sub-stereoscopic micro-image imaging unit;

[0009] Among them, multiple sub-stereoscopic micro-image imaging units are imaged by a micro-focusing element to form a stereoscopic projection image with a sense of spatial hierarchy. The stereoscopic projection image includes a geometric plane pattern and an auxiliary projection pattern. The auxiliary projection pattern is located on one side of the geometric plane pattern and / or in a blank area inside it. The brightness of the grayscale micro-image area is lower than that of the micro-image geometric surface element area.

[0010] Preferably, the design method of the micro-graphic layer is:

[0011] S1. Obtain target stereo projection image;

[0012] S2. Analyze the target stereoscopic projection image to decompose the target stereoscopic projection image into a projection background, a geometric plane pattern, and an auxiliary projection pattern;

[0013] S3, obtaining a micro-graphic geometrical bin area of ​​the micro-graphic layer by reversely pursuing the projection light of the geometrical plane pattern;

[0014] Based on the auxiliary projection pattern, a grayscale micro-image area is set on one side of the micro-image geometric element area and / or the blank area inside it;

[0015] Based on the projection background, design the corresponding occlusion area of ​​the micro-image layer.

[0016] Preferably, the grayscale micro-image unit includes a plurality of micro-holes, and the shapes of the plurality of micro-holes are the same or different.

[0017] Preferably, the grayscale micro-image unit includes a plurality of micropores, and the transmittance of the plurality of micropores is different.

[0018] Preferably, the grayscale micro-image unit includes a plurality of micro-holes; and the grayscale design method for imaging the grayscale micro-image unit is:

[0019] By changing the shape, duty cycle and transmittance of the micropores, auxiliary projection pattern imaging with different grayscales can be obtained;

[0020] When the duty cycle, transmittance and shape of the micropores are consistent, the auxiliary projection pattern is a single grayscale projection image;

[0021] When one or more of the duty cycle, transmittance and shape of the micropores are different, the auxiliary shadow image is a non-single grayscale projection image, wherein the non-single grayscale projection image includes a plurality of different grayscale areas.

[0022] Preferably, the average transmittance of the shielding area does not exceed 20%.

[0023] Preferably, the transparent spacer layer is a single-layer structure, and the thickness of the transparent spacer layer is 0.5 mm to 6.0 mm;

[0024] Preferably, the transparent spacer layer is multi-layered, and is formed by a composite of PMMA and PET, or a composite of multiple layers of PMMA, or a composite of at least two or more materials selected from PET, glass, PMMA, PC, PI or PE, and the thickness of the transparent spacer layer is 0.5 mm to 6.0 mm.

[0025] Preferably, the micro-focusing element layer includes a plurality of micro-focusing lenses, and the micro-focusing lenses are refractive micro-lenses, diffractive micro-lenses, or a combination thereof;

[0026] The micro-focusing lens includes a spherical micro-lens, an ellipsoidal micro-lens or a cylindrical micro-lens;

[0027] Diffractive microlenses include harmonic diffractive microlenses, planar diffractive microlenses or Fresnel zone plates.

[0028] The present invention discloses a micro imaging device, comprising a light source, a collimating lens and the above-mentioned stereoscopic projection imaging system. The light source is located on the side of the micro image layer away from the transparent spacing layer, and the collimating lens is located between the light source and the micro image layer.

[0029] The above technical solution of the present invention has the following advantages over the prior art:

[0030] 1. The present invention proposes an imaging system that uses grayscale to achieve stereoscopic projection. It takes advantage of people's psychological illusion of light and dark. That is, it is usually believed that the dark part is due to the light being blocked, and the bright part is due to direct light exposure. The alternating light and dark images have a visual sense of spatial layering.

[0031] 2. In the present invention, the geometric surface element area of ​​the micro-image is imaged by the micro-lens element layer to form a geometric plane pattern, which is relatively bright; while the grayscale micro-image area is imaged by the micro-lens element layer to form an auxiliary projection pattern, which is darker than the geometric plane pattern. Through this combination of light and dark, a three-dimensional pattern can be formed.

[0032] 3. The stereoscopic visual projection effect of the present invention is not affected by external ambient light, does not require wearing glasses, can be seen with naked eyes, and has the advantage of realistic three-dimensional effect.

[0033] 4. The stereoscopic visual projection effect of the present invention is achieved through the optimized design of the array imaging system, with a compact structure and high-definition and high-brightness projection images.

[0034] 5. The present invention has a wide range of applications. In addition to being used for vehicle-mounted road projection, it can also be used for medium and short-range projection of safety signs and commercial logos, giving people a unique three-dimensional visual effect, and thus has wide application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the structure of the stereoscopic projection imaging system of the present invention;

[0036] Figure 2 It is a schematic diagram of the calculation of the micro-graphic geometric surface area;

[0037] Figure 3 Schematic diagram of a stepped micro-image layer, where (a) is a micro-image geometric unit, (b) is a grayscale micro-image unit, and (c) is an occluded area.

[0038] Figure 4 is a schematic diagram of a projected pattern being a cube;

[0039] Figure 5 To achieve Figure 4 Schematic diagram of the micro-image unit structure of the first micro-image layer corresponding to the medium projection solution;

[0040] Figure 6 To achieve Figure 4 Schematic diagram of the micro-image unit structure of the second micro-image layer corresponding to the middle projection solution;

[0041] Figure 7 To achieve Figure 4 Schematic diagram of the micro-image unit structure of the third micro-image layer corresponding to the middle projection solution;

[0042] Figure 8 To achieve Figure 4 Schematic diagram of the micro-graphic unit structure of the fourth micro-graphic layer corresponding to the middle projection solution;

[0043] Figure 9 A schematic diagram of the use of a first stereoscopic projection imaging system;

[0044] Figure 10 is a schematic diagram of the use of a second stereoscopic projection imaging system;

[0045] Figure 11 Schematic diagram of the projection pattern being four arrows. DETAILED DESCRIPTION

[0046] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0047] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] Reference Figure 1 As shown, the present invention discloses a stereoscopic projection imaging system, comprising a micro-image layer, a transparent spacer layer 12 and a micro-focusing element layer 11 arranged in sequence, wherein the micro-image layer comprises a shielding area 13, a micro-image geometrical element area 14 and a grayscale micro-image area 15.

[0050] The shielding area 13 provides a projection background for stereoscopic projection imaging.

[0051] The micro-image and text geometrical surface element area 14 provides a geometrical plane pattern of an image to be projected. The micro-image and text geometrical surface element area includes a plurality of micro-image and text geometrical surface element units arranged in an array.

[0052] The grayscale micro-image area 15 provides an auxiliary projection pattern for the image to be projected. The grayscale micro-image area includes a plurality of grayscale micro-image units arranged in an array. These grayscale micro-image units correspond one-to-one with the micro-image geometric surface units. These grayscale micro-image units and the micro-image geometric surface units work together to form sub-stereoscopic micro-image imaging units. The sub-stereoscopic micro-image imaging units work together with the occlusion area to form micro-image units. A micro-image layer is composed of multiple micro-image units.

[0053] Among them, multiple sub-stereoscopic micro-image imaging units are imaged by micro-focusing elements to form a stereoscopic projection image with spatial layering. The stereoscopic projection image includes a geometric plane pattern and an auxiliary projection pattern. The auxiliary projection pattern is located on one side of the geometric plane pattern and / or in a blank area inside it. The brightness of the grayscale micro-image area is lower than that of the micro-image geometric surface element area.

[0054] Stereoscopic vision gives people a sense of space and depth. Through tens of thousands of years of evolution, humans have developed the ability to perceive three-dimensional objects not only through physiological information (such as binocular parallax and motion parallax), but also through psychological depth cues (such as linear perspective, structural gradients, and shadows). It is precisely through these rich spatial perception mechanisms that humans have been able to better adapt to their environment and continue to thrive.

[0055] The working principle of the present invention is as follows: The present invention proposes an imaging system that uses grayscale to achieve stereoscopic projection. It uses the psychological illusion of light and dark in people's consciousness, that is, it is generally believed that the dark part is due to the light being blocked, and the bright part is directly illuminated by the light. The image of alternating light and dark has a sense of spatial hierarchy visually. In the present invention, the micro-graphic geometric surface element area 14 is imaged by the microlens element layer 11 to form a geometric plane pattern, which is relatively bright; and the grayscale micro-graphic area 15 is imaged by the microlens element layer to form an auxiliary projection pattern, which is darker than the geometric plane pattern. Through this combination of light and dark, a three-dimensional pattern can be formed. The stereoscopic visual projection effect in the present invention is not affected by external ambient light, does not require wearing glasses, is visible to the naked eye, and has the advantage of realistic three-dimensional feeling.

[0056] The stereoscopic visual projection effect of the present invention is achieved through an optimized design of the array imaging system, resulting in a compact structure and high-definition and high-brightness projection images. The present invention has a wide range of applications. In addition to being used for on-vehicle road projection (such as BMW's welcome light, invention patent application number: 201680033867.4), it can also be used for medium- and short-range projection of safety signs and commercial logos, creating a unique stereoscopic visual effect. Therefore, it has a wide range of applications.

[0057] In the present invention, the imaging of the grayscale micro-image area generates an auxiliary projection pattern with grayscale levels without interfering with the geometric element pattern. The geometric element pattern and the auxiliary projection pattern are combined to form a three-dimensional projection effect with psychological depth suggestion.

[0058] Furthermore, the design method of the micro-image layer is:

[0059] S1. Obtain target stereo projection image;

[0060] S2. Analyze the target stereoscopic projection image and decompose the target stereoscopic projection image into a projection background, a geometric plane pattern, and an auxiliary projection pattern;

[0061] S3. Obtain the micro-graphic geometric element area of ​​the micro-graphic layer by reversely pursuing the projection light of the geometric plane pattern; set a grayscale micro-graphic area on one side of the micro-graphic geometric element area and / or its internal blank area based on the auxiliary projection pattern; design the corresponding occlusion area of ​​the micro-graphic layer based on the projection background.

[0062] In the present invention, the brightness of the micro-graphic geometrical bin area 14 is greater than that of the grayscale micro-graphic area 15. The grayscale value of the grayscale micro-graphic area 15 can be designed, so that a better stereoscopic projection imaging can be formed.

[0063] In the present invention, the grayscale micro-image unit is designed as follows: the grayscale micro-image unit includes a plurality of micropores, each of which may have the same or different shapes. The plurality of micropores have different transmittances. To design the imaging of the grayscale micro-image unit, the present invention also discloses a grayscale design method for the imaging of the grayscale micro-image unit, as follows:

[0064] By varying the shape, duty cycle, and transmittance of the micropores, auxiliary projection patterns with varying grayscales are created. When the duty cycle, transmittance, and shape of the micropores are consistent, the auxiliary projection pattern is a single grayscale projection. When one or more of the duty cycle, transmittance, and shape of the micropores differ, the auxiliary shadow image is a non-single grayscale projection, comprising multiple grayscale regions. The micropores within the grayscale micro-image region created in the present invention have high resolution, enabling the projection image to display a richer range of grayscale levels, resulting in a more detailed grayscale image. Furthermore, the array-based multi-channel system employed in the present invention imparts a strong sense of three-dimensionality to the projected image.

[0065] In the present invention, the shielding area is an opaque area, and the average transmittance of the shielding area 13 does not exceed 20%, so that a dark background can be provided for stereoscopic imaging.

[0066] The design of the transparent spacer layer 12 of the present invention is as follows: on the one hand, the transparent spacer layer is a single-layer structure, and the thickness of the transparent spacer layer is 0.5mm~6.0mm; on the other hand, the transparent spacer layer can also be a multi-layer structure, and the multi-layer transparent spacer layer is formed by a composite of PMMA and PET, or a composite of multiple layers of PMMA, or a composite of at least two or more materials selected from PET, glass, PMMA, PC, PI or PE, and the thickness of the transparent spacer layer is 0.5mm~6.0mm.

[0067] In the present invention, the design of the microfocusing element layer 11 is as follows: the microfocusing element layer includes a plurality of microfocusing lenses, which are refractive microlenses, diffractive microlenses, or a combination thereof; the microfocusing lenses include spherical microlenses, ellipsoidal microlenses, or cylindrical microlenses; and the diffraction microlenses include harmonic diffraction microlenses, planar diffraction microlenses, or Fresnel zone plates.

[0068] The present invention discloses a micro-imaging device comprising a light source, a collimating lens, and the aforementioned stereoscopic projection imaging system. The light source is located on the side of the micro-image layer away from the transparent spacer layer, and the collimating lens is located between the light source and the micro-image layer. The light source is collimated by the collimating lens to form parallel light. The parallel light enters the micro-image layer perpendicularly and then exits through the micro-focusing element layer, forming a stereoscopic three-dimensional image.

[0069] The technical solutions of the present invention are further described and explained below in conjunction with specific embodiments.

[0070] In one embodiment, a stereoscopic projection imaging device, referring to Figure 1 As shown, the micro-projection device includes a micro-focusing element layer 11, a transparent spacer layer 12 and a micro-image layer.

[0071] The micro-focusing element layer 11 and the micro-image layer are respectively provided on two surfaces of the transparent spacer layer 12. The transparent spacer layer includes a first surface and a second surface disposed opposite the first surface. The transparent spacer layer can be a single-layer structure or a multi-layer composite structure. When the transparent spacer layer is a single-layer structure, the transparent spacer layer is made of a material with a certain transmittance, such as PET, glass, PMMA, PC, PI, PE, etc. When the transparent spacer layer is multi-layered, the transparent spacer layer is formed by a composite of PMMA and PET, or a composite of multiple layers of PMMA, or a composite of at least two or more of PET, glass, PMMA, PC, PI, and PE. Of course, the transparent spacer layer can also be a cavity, that is, the transparent spacer layer is an air layer. The thickness of the transparent spacer layer is 0.5 mm to 6.0 mm.

[0072] The microfocusing units of the microfocusing element layer can be refractive microlenses, diffractive microlenses, or a combination or combination thereof. Microlenses based on geometric optics can include spherical microlenses, ellipsoidal microlenses, cylindrical microlenses, or any other geometric shape. Diffractive microlenses include harmonic diffraction microlenses, planar diffraction microlenses, Fresnel zone plates, and the like. The specific arrangement of the above structures can be periodic, partially periodic, aperiodic, random, or a combination thereof.

[0073] The micro-graphic layer includes a micro-graphic geometric surface area 14, a grayscale micro-graphic area 15, and an occlusion area 13. The micro-graphic geometric surface unit array within the micro-graphic geometric surface area is generated by reverse tracing the projection image, calculating the micro-graphic geometric surface unit under each micro-focusing unit through reverse ray tracing. The grayscale micro-graphic unit array within the grayscale micro-graphic area is generated based on the need to generate a three-dimensional visual effect. The grayscale micro-graphic area is obtained by reverse ray tracing using an auxiliary projection pattern. A micro-pore array is provided within the grayscale micro-graphic area, which is generated by a computer. The shapes of the micro-pore array patterns within each grayscale micro-graphic area can be the same or different, such as circular, square, triangular, rectangular, or other regular or irregular polygons and curved polygons, as well as combinations thereof. The micro-pore arrangement within the same grayscale micro-graphic area can be square, honeycomb, or other regular or irregular arrangements. Furthermore, the micro-pores can be the same or different in size. Furthermore, the transmittance of the micropores may be the same or different.

[0074] The shielding layer 13 is an opaque area with an average transmittance of no more than 20%. To achieve this, it can be made of an absorbing or reflecting material such as ink, pigment, dye, or an absorbing or reflecting material formed by a nanostructure, or a single-layer metal coating, a multi-layer metal coating, a coating formed by an absorbing layer, a low-refractive index dielectric layer, and a reflective layer, a high-refractive index dielectric layer coating, a multi-layer dielectric coating formed by stacking a first high-refractive index dielectric layer, a low-refractive index dielectric layer, and a second high-refractive index dielectric layer in sequence, or a coating formed by stacking an absorbing layer, a high-refractive index dielectric layer, and a reflective layer in sequence.

[0075] The stereoscopic projection system in this embodiment is used as follows: collimated light is incident from one side of the micro-graphic layer and, through the stereoscopic projection system of the present invention, is projected onto a receiving surface located a certain distance from the micro-focusing element layer. Because the stereoscopic projection system has multiple channel arrays, the micro-graphic geometric binning unit array is integrated to form a geometric binning pattern with the highest brightness, while the grayscale micro-graphic unit array is integrated to form a supplementary shadow image with varying grayscale brightness. The geometric binning pattern and supplementary projection pattern combine to form a complete projection image with a stereoscopic visual effect.

[0076] The light-transmitting micro-hole array within the auxiliary micro-graphic area creates a comprehensive visual effect on the auxiliary projection pattern, producing a grayscale auxiliary projection pattern without interfering with the geometric element pattern. The geometric element pattern and the auxiliary projection pattern combine to form a three-dimensional projection effect with psychological depth suggestion.

[0077] In one embodiment, a method for generating micro-graphic geometrical facet units in a micro-graphic layer. Figure 2 As shown, suppose that the preset point (x L ,yL ,z L ) and the imaging device is at a distance z L The refractive index of the micro-focusing element is n2, the refractive index of the transparent spacer layer is close to that of the micro-focusing element, and its thickness is t, the micro-focusing unit sagittal height on the second surface side of the transparent spacer layer is h, and the center coordinates (x i ,y i ), the coordinate point (x′) of the main image on the first surface of the transparent spacer layer iL ,y′ iL ,-(t+h) iL ), can be calculated from the incident angle θ and the refraction angle θ':

[0078]

[0079]

[0080] In one embodiment, the composition of the micro-graphic geometrical bin area, the grayscale micro-graphic area and the shielding layer area in the micro-graphic layer. Figure 3 As shown, with steps as the projection pattern, Figure 3 (a) is the main micro-image area under a certain micro-focusing unit, which is generated by the aforementioned method for generating micro-image geometric surface element units. The micro-image geometric surface element area has the highest projection brightness and provides a geometric surface element pattern. Figure 3 (b) shows the auxiliary micro-graphic region beneath a micro-focusing unit. Its boundary is generated using the aforementioned method for generating micro-graphic geometric bins, and the grayscale micro-graphic unit array within the region is generated using the aforementioned method for generating grayscale micro-graphic units. The example shown in the figure is an array of transparent micro-circular holes, but other geometric shapes, sizes, and regular or irregular arrangements of micro-holes with equal or varying densities are also possible. Figure 3 The black area in (c) is the shielding layer area surrounding the primary micro-image area and the secondary micro-image area. The shielding layer area has a transmittance of less than 50% and can be made of an absorbing or reflective material such as ink, pigment, dye, or an absorbing or reflective material formed by a nanostructure, or a single-layer metal coating, a multi-layer metal coating, a coating formed by an absorbing layer, a low-refractive-index dielectric layer, and a reflective layer, a high-refractive-index dielectric layer coating, a multi-layer dielectric coating formed by stacking a first high-refractive-index dielectric layer, a low-refractive-index dielectric layer, and a second high-refractive-index dielectric layer in sequence, or a coating formed by stacking an absorbing layer, a high-refractive-index dielectric layer, and a reflective layer in sequence.

[0081] In one embodiment, referring to Figure 4As shown, this embodiment can achieve a cubic projection pattern. The brightest square area serves as the main projection area 41, and two adjacent visible square areas with different grayscale levels serve as the high-brightness auxiliary projection area 42 and the low-brightness auxiliary projection area 43, respectively. In addition to the main projection area 41 and the auxiliary projection areas 42 and 43, there is also a background black area 44.

[0082] In order to achieve the reference Figure 4 The stereoscopic projection effect shown is shown in Figure 5-Figure 8 It is the micro-image and text in the micro-image and text layer of the stereoscopic projection device.

[0083] Reference Figure 5 The figure shows a schematic diagram of a micro-image layer in an embodiment. Multiple micro-image geometric surface units form a geometric surface pattern with a brightest area 51. Multiple grayscale micro-image units form an auxiliary projection pattern. Here, the grayscale micro-image units are composed of a regularly arranged array of micro-holes of the same size. Assume that there are M micro-lenses participating in the imaging, the diameter of the micro-holes in the geometric surface is Φ, there are N micro-holes, and the area of ​​the geometric surface is S, then the projection grayscale is Where I0 is the brightness of the geometric surface element when all the light is transmitted. Or more generally, the projection grayscale can be expressed as the ratio of the sum of the areas of all the light-transmitting micropores involved in the projection imaging to the areas of all the geometric surface elements.

[0084]

[0085] The duty cycles of the microhole arrays in 52 and 53 within the geometrical element region are different, thereby forming auxiliary projection patterns with different grayscales.

[0086] Reference Figure 6 As shown in FIG. 1 , a schematic diagram of a micro-graphic layer in an embodiment is shown. Since the angles between the light of the micro-graphic geometrical element unit and the geometrical element pattern are different, the shape of the micro-graphic geometrical element unit is different from that of the micro-graphic geometrical element unit. Figure 5 Different, with the brightest area 61. Multiple grayscale micro-graphic units form an auxiliary projection pattern. One grayscale micro-graphic area is composed of an irregularly arranged micro-circular hole array 62 of uniform size. Another auxiliary graphic unit area is composed of a micro-hole array 63 of different shapes. The micro-circular hole array 62 that makes up the auxiliary micro-graphic area has a greater duty cycle than the micro-hole array 63 that makes up the auxiliary micro-graphic area, thus forming auxiliary projection patterns with different grayscales.

[0087] Reference Figure 7 As shown in FIG. 1 , a schematic diagram of a micro-graphic layer in an embodiment is shown. Since the angles between the light of the micro-graphic geometrical element unit and the geometrical element pattern are different, the shape of the micro-graphic geometrical element unit is different from that of the micro-graphic geometrical element unit. Figure 5 and Figure 6Different, with the brightest area 71. Multiple grayscale micro-graphic units form an auxiliary projection pattern. One grayscale micro-graphic area is composed of an irregularly arranged array of uniformly sized micro-square holes 72. Another auxiliary graphic unit area is composed of a regularly arranged or irregular array of micro-holes 73 of varying shapes. The duty cycle of micro-hole array 72 forming the auxiliary micro-graphic area is greater than that of micro-hole array 73 forming the auxiliary micro-graphic area, thus forming auxiliary projection patterns with different grayscales.

[0088] Reference Figure 8 As shown in FIG. 1 , a schematic diagram of a micro-graphic layer in an embodiment is shown. Since the angles between the light of the micro-graphic geometrical element unit and the geometrical element pattern are different, the shape of the micro-graphic geometrical element unit is different from that of the micro-graphic geometrical element unit. Figure 5 、 Figure 6 and Figure 7 Different, with the brightest area 81. Multiple grayscale micro-graphic units form an auxiliary projection pattern. One grayscale micro-graphic area is composed of an irregularly arranged micropore array 82 of different shapes. Another auxiliary graphic unit area is composed of a regularly arranged or irregular micropore array 83 of different sizes. The transmittance of the micropores can also be different. The duty cycle of the micropore array 82 that constitutes the auxiliary micro-graphic area is greater than that of the micropore array 83 that constitutes the auxiliary micro-graphic area, thereby forming auxiliary projection patterns with different grayscales.

[0089] Reference Figure 9 The figure shows one way to use the stereoscopic projection imaging device of the present invention. Using collimated light illumination from one side of the micro-graphic layer, the micro-graphic geometric binning unit array 92 forms a geometric binning pattern 94, which has the highest brightness. The grayscale micro-graphic unit array 93 forms an auxiliary projection pattern 95, which has varying grayscale brightness and is projected onto a receiving surface at a certain distance from the micro-focusing element. Because the stereoscopic projection device has multiple channel arrays, the geometric binning pattern 104 and the auxiliary projection pattern 105 combine to form a complete projection image with a stereoscopic visual effect.

[0090] Reference Figure 10 The figure shows a method of using the stereoscopic projection imaging device of the present invention. Using collimated light illumination, incident from one side of the micro-image layer, the micro-image geometric element unit array 102 is integrated to form a geometric element pattern 104, which has the highest brightness. The grayscale micro-image unit array 103 is integrated to form an auxiliary projection pattern 105, which has different grayscale brightness and is projected on the receiving surface at a certain distance from the micro-focusing element side. Since the stereoscopic projection device has multiple channel arrays, the geometric element pattern 104 and the auxiliary projection pattern 105 are combined to form a complete projection image with a stereoscopic visual effect. Compared with the reference Figure 9 The difference is, Figure 10 The stereoscopic projection receiving surface is not parallel to the micro-focusing element bearing plane, and is particularly suitable for applications in short-distance vehicle-mounted projection.

[0091] Reference Figure 11 FIG. 1 is a schematic diagram of the application of the stereoscopic projection imaging device of the present invention. A projection image with different brightness and darkness can be obtained on the projection surface, thereby obtaining a psychological three-dimensional layering sense.

[0092] The invention has a wide range of applications and can be used for image display, welcome lighting, brand logo display, or in vehicle safety light devices to improve road safety.

[0093] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail above with reference to the accompanying drawings. In the above description, many specific details are set forth in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described above, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed above. In addition, the various technical features of the embodiments described above can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A stereoscopic projection imaging system, characterized in that: The micro-image layer, the transparent spacer layer and the micro-focusing element layer are sequentially arranged, and the micro-image layer includes: The occlusion area provides a projection background for stereoscopic projection imaging; A micro-image geometrical element region, which provides a geometrical plane pattern of an image to be projected, wherein the micro-image geometrical element region includes a plurality of micro-image geometrical element units arranged in an array; A grayscale micro-image area, which provides an auxiliary projection pattern of the image to be projected, the grayscale micro-image area including a plurality of grayscale micro-image units arranged in an array, the grayscale micro-image units corresponding to the micro-image geometric surface units, and cooperating with the micro-image geometric surface units to form a sub-stereoscopic micro-image imaging unit; The plurality of sub-stereoscopic micro-image imaging units are imaged by a micro-focusing element to form a stereoscopic projection image with a sense of spatial hierarchy. The stereoscopic projection image includes a geometric plane pattern and an auxiliary projection pattern. The auxiliary projection pattern is located on one side of the geometric plane pattern and / or in a blank area within the geometric plane pattern. The brightness of the grayscale micro-image area is lower than that of the micro-image geometric bin area. The design method of the micro-graphic layer is as follows: S1, obtaining a target stereoscopic projection image; S2, analyzing the target stereoscopic projection image, and decomposing the target stereoscopic projection image into a projection background, a geometric plane pattern, and an auxiliary projection pattern; S3, obtaining a micro-graphic geometric surface element area of ​​the micro-graphic layer by reversely pursuing the projection light of the geometric plane pattern; based on the auxiliary projection pattern, setting a grayscale micro-graphic area on one side of the micro-graphic geometric surface element area and / or its internal blank area; based on the projection background, designing a corresponding occlusion area of ​​the micro-graphic layer.

2. The stereoscopic projection imaging system according to claim 1, wherein: The grayscale micro-image unit includes a plurality of micro-holes, and the shapes of the plurality of micro-holes are the same or different.

3. The stereoscopic projection imaging system according to claim 1, wherein: The grayscale micro-image unit includes a plurality of micropores, and the transmittance of the plurality of micropores is different.

4. The stereoscopic projection imaging system according to claim 1, wherein: The grayscale micro-image unit includes a plurality of micro-holes; the grayscale design method for imaging the grayscale micro-image unit is: By changing the shape, duty cycle and transmittance of the micropores, auxiliary projection pattern imaging with different grayscales can be obtained; When the duty cycle, transmittance and shape of the micropores are consistent, the auxiliary projection pattern is a single grayscale projection image; When one or more of the duty cycle, transmittance and shape of the micropores are different, the auxiliary projection image is a non-single grayscale projection image, wherein the non-single grayscale projection image includes a plurality of different grayscale areas.

5. The stereoscopic projection imaging system according to claim 1, wherein: The average transmittance of the shielding area does not exceed 20%.

6. The stereoscopic projection imaging system according to claim 1, wherein: The transparent spacer layer is a single-layer structure, and the thickness of the transparent spacer layer is 0.5 mm-6.0 mm.

7. The stereoscopic projection imaging system according to claim 1, wherein: The transparent spacer layer is multi-layered, and is formed by a composite of PMMA and PET, or a composite of multiple layers of PMMA, or a composite of at least two or more materials selected from PET, glass, PMMA, PC, PI or PE. The thickness of the transparent spacer layer is 0.5mm-6.0mm.

8. The stereoscopic projection imaging system according to claim 1, wherein: The micro-focusing element layer includes a plurality of micro-focusing lenses, and the micro-focusing lenses are refractive micro-lenses, diffractive micro-lenses, or a combination thereof; The micro-focusing lens includes a spherical micro-lens, an ellipsoidal micro-lens or a cylindrical micro-lens; Diffractive microlenses include harmonic diffractive microlenses, planar diffractive microlenses or Fresnel zone plates.

9. A micro imaging device, characterized in that: The system comprises a light source, a collimating lens and the stereoscopic projection imaging system according to any one of claims 1 to 8, wherein the light source is located on the side of the micro-image layer away from the transparent spacer layer, and the collimating lens is located between the light source and the micro-image layer.

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