Flexible holographic transparent imaging film, imaging screen and preparation method

Abstract

The present invention discloses a flexible holographic transparent imaging film, an imaging screen and a preparation method, comprising a flexible carrier film, a light reflection layer and a transparent holographic imaging layer arranged in sequence, a wire arranged between the flexible carrier film and the light reflection layer, microscopic reflective concave platforms arranged in the light reflection layer, microscopic grooves arranged between the microscopic reflective concave platforms connected to each other or connected to the wires through the microscopic grooves, and a conductive film arranged on the light reflection layer; the transparent holographic imaging layer comprises a transition layer, a base layer and a composite superposition layer arranged in sequence, the transition layer fills and smoothes the microscopic reflective concave platforms and microscopic grooves in the light reflection layer, the base layer comprises a metal oxide layer, and the composite superposition layer comprises at least two layers of reflective coatings or refractive coatings vacuum-plated by different coating materials. The imaging film and imaging screen prepared by the present invention have good imaging quality; can effectively transmit harmful blue light and purple light in the light source; have zero radiation, zero strobe, no harmful blue light, anti-glare effect, and good visual effect.

Description

Technical Field

[0001] The present invention relates to the field of projection display technology, and in particular to a flexible holographic transparent imaging film, an imaging screen and a preparation method thereof. Background Art

[0002] The holographic transparent imaging screen is a display screen composed of a transparent projection film. When used with a projector, it can present lifelike, high-definition, 3D images on the imaging screen. The image quality is clear and bright, and the scene behind can be displayed through the projection film. The holographic transparent imaging screen is suitable for virtual display technology and is an excellent carrier for realizing the concepts of the metaverse and intelligent AI. It can also be used in product advertising displays, window displays, museum product displays, educational displays, etc.

[0003] The Chinese invention patent with the patent publication number CN112363266A and the patent name of transparent holographic film for projector discloses a transparent holographic film, which includes a pressure-sensitive adhesive layer and an optical structure layer that are bonded to each other; the optical structure layer is provided with a plurality of strip grooves with a trapezoidal cross section on the bonding surface with the pressure-sensitive adhesive layer, and each two adjacent strip grooves are spaced at a preset distance and arranged parallel to each other, and the surface of the strip grooves is a matte surface, and the projector projects light to the matte surface to form a preset image on the optical structure layer. This transparent holographic film has only strip grooves in the optical structure layer, and its imaging effect is poor, the viewing angle range is small, and the transparency of the holographic projection film is basically between 60% and 65%, and the film surface has a large haze, which is not transparent enough when viewed by human eyes, affecting the visual effect.

[0004] When using transparent holographic film to prepare transparent holographic imaging screen, the existing technology usually sticks the cut transparent holographic film on the transparent glass through adhesive. This method needs to ensure that the surface is flat and free of bubbles after sticking. However, this direct sticking method has the defect that it cannot be adjusted later. With the increase of usage time and the change of ambient temperature, the imaging film will expand and contract, wrinkle and other changes, which can easily affect the imaging quality. In particular, the deformation of large-sized and ultra-large transparent film screens is more obvious, which is not conducive to ensuring clear, bright and realistic 3D display effects in the long term. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a flexible holographic transparent imaging film, an imaging screen and a preparation method, which include a light reflecting layer and a transparent holographic imaging layer, in which a plurality of nano-level optical functional layers are arranged, and the imaging effect is realistic and the visual effect is good. In addition, the imaging screen can overcome the problem of deterioration of the imaging effect caused by the expansion or contraction or wrinkling of the flexible holographic transparent imaging film, and can stably maintain a clear, bright and realistic 3D display effect for a long time.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A flexible holographic transparent imaging film comprises a flexible carrier film, a light reflecting layer and a transparent holographic imaging layer which are arranged in sequence, wherein the flexible carrier film comprises a transparent PET, PVC or TPU film, a wire is arranged between the flexible carrier film and the light reflecting layer, the light reflecting layer is provided with microscopic reflective concave terraces arranged in an array, microscopic grooves are arranged between the microscopic reflective concave terraces and connected to each other, or connected to the wires through the microscopic grooves, the transparent holographic imaging layer comprises a transition layer, a primer layer and a composite superposition layer which are arranged in sequence, the transition layer fills and smoothes the microscopic reflective concave terraces and microscopic grooves in the light reflecting layer, the primer layer comprises a metal oxide layer, and the composite superposition layer comprises at least two reflective coating layers or refractive coating layers which are vacuum-plated with different coating materials.

[0008] Furthermore, a conductive film is provided on the microscopic reflective concave platform and the micro groove, and the left and right ends of the conductive film are respectively connected to the conductive wire, and the thickness of the conductive film is smaller than the depth of the microscopic reflective concave platform.

[0009] Furthermore, the thickness of the light reflecting layer is 50-300 microns; and the directional reflectivity R of the light reflecting layer is ≥45%.

[0010] Furthermore, the transition layer includes non-conductive silicon oxide, silicon dioxide or silicon nitride; the base layer includes titanium oxide or aluminum oxide; the composite stacking layer includes aluminum oxide or niobium oxide coating, and the thickness of each coating in the composite stacking layer is 10-50 nanometers.

[0011] Furthermore, the transmittance of the prepared imaging film is 70%-75%.

[0012] Furthermore, a flexible holographic transparent imaging screen is formed by cutting the above-mentioned flexible holographic transparent imaging film. A clamping seat is provided at one end of the cut flexible holographic transparent imaging film, and a tensioning control device is provided at the other end of the flexible holographic transparent imaging film. The tensioning control device includes a guide roller, a tension measuring roller and a tensioning driving roller. The other end of the flexible holographic transparent imaging film is wound on the tensioning driving roller through the guide roller and the tension measuring roller. Both ends of the tensioning driving roller are respectively provided with conductive rings in contact with the wire. The tensioning driving roller is connected to a servo motor. The tension measuring roller, the conductive ring and the servo motor are electrically connected to a control circuit. The control circuit controls the servo motor to fine-tune the rotation according to the tension measured by the sensor in the tension measuring roller to tension the flexible holographic transparent imaging film, and outputs a controllable current to the flexible holographic transparent imaging film through the conductive ring and the wire.

[0013] Furthermore, the clamping fixing seat includes a fixed clamp plate and a tensioning adjustment clamp plate, and the tensioning driving roller is provided with a fixed clamp ring and a clamping adjustment clamp ring, the fixed clamp plate and the tensioning adjustment clamp plate are respectively used to fix the upper end of the tensioned flexible holographic transparent imaging film, and the fixed clamp ring and the clamping adjustment clamp ring are respectively used to fix the lower end of the tensioned flexible holographic transparent imaging film; after the flexible holographic transparent imaging film is tensioned, the fine-tuning rotation angle of the tensioning driving roller is less than 270°.

[0014] A method for preparing a flexible holographic transparent imaging film in the above-mentioned flexible holographic transparent imaging screen comprises the following steps:

[0015] S1. Press the conductor onto the flexible carrier film according to the required size;

[0016] S2. Preparation of light reflective layer: The flexible carrier film roll is placed on the production line and the tension is adjusted. The resin stock solution is coated on the forming transfer roller. The forming transfer roller is precisely engraved with corresponding convex microstructures for rolling micro-reflective concave terraces and micro-grooves. The micro-reflective concave terraces and micro-grooves are continuously rolled out on the continuously moving flexible carrier film through a transfer process. The rotation speed of the forming transfer roller is controlled during the rolling process. The resin stock solution at the rolling location is cured using a UV cold light source.

[0017] S3, preparing a conductive film on the microscopic reflective concave terraces and microscopic grooves, wherein the conductive film is electrically connected to the conductive wire;

[0018] S4, vacuum sputtering coating of transition layer: using vacuum magnetron sputtering coating equipment to coat the transition layer on the light reflection layer, the transition layer fills the microscopic reflection concave terraces and micro grooves to make them smooth and flat;

[0019] S5, vacuum sputtering coating of the base layer: coating the base layer on the transition layer, and controlling the coating thickness to reach the set requirements;

[0020] S6. Vacuum sputtering coating of composite superimposed layers: coating the base layer several times to form a composite superimposed layer, and controlling the thickness of each coating layer to meet the set requirements.

[0021] Furthermore, in the step S3, a vacuum sputtering coating method is used to prepare a conductive film on the microscopic reflective concave platform and the micro groove.

[0022] Furthermore, the steps S4-S6 are continuously produced by roll-to-roll processing.

[0023] The present invention has the following beneficial effects:

[0024] 1. The present invention arranges a transparent light reflecting layer on a transparent flexible carrier film, and a microscopic reflecting structure composed of uniformly arranged reflective pits is arranged in the light reflecting layer. The light reflecting layer is further combined with a transparent holographic imaging layer, and a plurality of nano-level optical functional layers prepared by a vacuum magnetron sputtering coating process are arranged in the transparent holographic imaging layer, thereby improving the imaging quality on the basis of ensuring the light transmittance of the film; the nano-level optical functional layer can effectively transmit harmful blue light and purple light in the light source; the imaging screen made of the flexible holographic transparent imaging film can truly achieve zero radiation, zero strobe, no harmful blue light, has an anti-glare effect, good visual effect, and can better protect eyesight.

[0025] 2. In the present invention, a conductive film is also arranged on the microscopic reflective concave terraces and micro grooves, and the conductive film that changes the light transmittance after being energized can be further combined with the light reflection layer and the transparent holographic imaging layer to make the imaging film have better and more diverse display performance. Adding the conductive film can better ensure clear, bright and realistic 3D display effects.

[0026] 3. The flexible holographic transparent imaging film of the present invention is suitable for continuous production and processing by roll-to-roll vacuum magnetron sputtering coating equipment, is suitable for large-scale batch production, and the production and preparation method is stable and reliable.

[0027] 4. The imaging screen of the present invention is provided with a tension control device capable of adjusting and controlling the flexible holographic transparent imaging film. The control circuit controls the servo motor to fine-tune the rotation according to the data measured by the sensor in the tension measuring roller, and accurately controls the rotation angle of the servo motor to tension the flexible holographic transparent imaging film, thereby overcoming the problem of deterioration of imaging effect caused by expansion or contraction or wrinkling of the flexible holographic transparent imaging film, so that the flexible holographic transparent imaging screen can stably maintain clear, bright and realistic 3D display effect for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the cross-sectional structure of the flexible holographic transparent imaging film of the present invention.

[0029] Figure 2 It is a schematic diagram of the planar structure of the connection between the light reflecting layer and the wire of the present invention.

[0030] Figure 3 It is a schematic diagram of the side structure of the flexible holographic transparent imaging screen of the present invention.

[0031] Figure 4 It is a schematic diagram of the front view structure of the flexible holographic transparent imaging screen of the present invention.

[0032] Description of reference numerals:

[0033] 1. Flexible carrier film; 2. Light reflection layer; 21. Microscopic reflective concave platform; 22. Micro groove; 3. Transparent holographic imaging layer; 31. Transition layer; 32. Base layer; 33. Composite superposition layer; 4. Wire; 5. Conductive film; 6. Clamping and fixing seat; 61. Fixed clamping plate; 62. Tensioning and adjusting clamping plate; 7. Tensioning control device; 71. Guide roller; 72. Tension measuring roller; 73. Tensioning driving roller; 731. Fixed clamping ring; 732. Clamping and adjusting clamping ring; 74. Conductive ring. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0035] See also Figure 1-2 As shown, a flexible holographic transparent imaging film comprises a flexible carrier film 1, a light reflecting layer 2 and a transparent holographic imaging layer 3 arranged in sequence, the flexible carrier film 1 comprises a transparent PET, PVC or TPU film, a wire 4 is arranged between the flexible carrier film 1 and the light reflecting layer 2, the wire 4 comprises two or more wires for connection on the imaging film to form a conductive loop, microscopic reflective concave terraces 21 are arranged in the light reflecting layer 2, the cross-sectional shape of the microscopic reflective concave terraces 21 comprises a triangle, a circle, a polygon or a star, etc., the area ratio of the microscopic reflective concave terraces 21 in the light reflecting layer 2 is designed according to the transmittance, microscopic grooves 22 are arranged between the microscopic reflective concave terraces 21 to connect with each other, or to connect with the wire 4 through the microscopic grooves 22, the The thickness of the light reflection layer 2 is 50-300 microns; the directional reflectivity R of the light reflection layer 2 is ≥45%; the transparent holographic imaging layer 3 includes a transition layer 31, a base layer 32 and a composite superposition layer 33 arranged in sequence, the transition layer 31 fills and smoothes the microscopic reflective concave platform 21 and the fine groove 22 in the light reflection layer 2, the base layer 32 includes a plurality of metal oxide layers protecting titanium oxide or aluminum oxide, the composite superposition layer 33 also includes a plurality of metal oxide coatings, in this embodiment, the composite superposition layer 33 is provided with two layers of reflective coatings and one layer of refractive coatings formed by vacuum coating of different coating materials, or the composite superposition layer 33 is provided with one layer of reflective coating and two layers of refractive coatings, and the coating materials are aluminum oxide or niobium oxide. The transition layer 31 includes non-conductive silicon oxide, silicon dioxide or silicon nitride; the thickness of the aluminum oxide or niobium oxide coating in the composite superposition layer 33 is 10-50 nanometers. The transmittance of the prepared imaging film is controlled at 70%-75% to ensure the light transmission effect.

[0036] On the basis of the aforementioned embodiment, a conductive film 5 is further provided on the microscopic reflective concave platform 21 and the micro groove 22. During actual processing, the conductive film 5 can cover the entire surface of the light reflecting layer 2; the left and right ends of the conductive film 5 are respectively electrically connected to the wire 4, and the thickness of the conductive film 5 is less than the depth of the microscopic reflective concave platform 21. After adding the conductive film 5, the concave structure of the microscopic reflective concave platform 21 can also be retained, which is convenient for combining with the transparent holographic imaging layer 3.

[0037] In normal use, the flexible holographic transparent imaging screen formed by cutting and processing the above-mentioned flexible holographic transparent imaging film includes the cut flexible holographic transparent imaging film and the optical adhesive and protective film arranged thereon. When in use, the protective film can be torn off to stick the flexible holographic transparent imaging film steadily and firmly to the place where it is needed, such as the glass surface or other flat carrier. When it is needed to be changed later, it can be torn off lightly without residual glue or traces, which will not affect the subsequent use effect.

[0038] Or, further, see Figure 3-4 As shown in the figure, a clamping fixing seat 6 is arranged at one end of the cut flexible holographic transparent imaging film, and a tension control device 7 is arranged at the other end of the flexible holographic transparent imaging film, and the tension control device 7 comprises a guide roller 71, a tension measuring roller 72 and a tension driving roller 73. The other end of the flexible holographic transparent imaging film is wound on the tension driving roller 73 through the guide roller 71 and the tension measuring roller 72. Both ends of the tension driving roller 73 are respectively provided with conductive rings 74 in contact with the wire 4. The tension driving roller 73 is connected to a servo motor, and the tension measuring roller 72, the conductive ring 74 and the servo motor are electrically connected to a control circuit. The control circuit measures the tension through the tension measuring roller 71. The data measured by the sensor in the roller 72 is then used to control the fine-tuning rotation of the servo motor, so as to accurately control the rotation angle of the servo motor and the tensioning driving roller 73; the clamping fixing seat 6 includes a fixed clamping plate 61 and a tensioning adjustment clamping plate 62, and the tensioning driving roller 73 is provided with a fixed clamping ring 731 and a clamping adjustment clamping ring 732, the fixed clamping plate 61 and the tensioning adjustment clamping plate 62 are respectively used to fix the upper end of the tensioned flexible holographic transparent imaging film, and the fixed clamping ring 731 and the clamping adjustment clamping ring 732 are respectively used to fix the lower end of the tensioned flexible holographic transparent imaging film; after the flexible holographic transparent imaging film is tensioned, the fine-tuning rotation angle of the tensioning driving roller 73 is less than 270°.

[0039] The diameter of the tensioning driving roller 73 is designed according to the size of the screen; the flexible holographic transparent imaging film can be reliably tensioned by means of the clamping fixing seat 6 and the tensioning driving roller 73 to prevent the flexible holographic transparent imaging film from wrinkling and becoming uneven after being used for a period of time, thereby ensuring that the flexible holographic transparent imaging screen has a long-term stable optical effect; connecting wires are respectively arranged inside the tensioning driving roller 73 to be connected to the conductive rings 74 arranged at both ends, and a controllable current is output to the flexible holographic transparent imaging film through the conductive rings 74 and the wire 4. The conductive film 5 can present different photoconductivities when connected to different currents, so as to be combined with the microscopic reflective concave platform 21 and the transition layer 31, the base layer 32 and the composite stacking layer 33 to present different display effects.

[0040] In actual use, optical protective glass can be added to the front and back sides of the flexible holographic transparent imaging film, and the tension control device 7 can be arranged in a box body for decoration.

[0041] Furthermore, a method for preparing the flexible holographic transparent imaging film in the above-mentioned flexible holographic transparent imaging screen comprises the following steps:

[0042] S1, pressing the conductors 4 on both sides of the flexible carrier film 1 according to the required size;

[0043] S2, preparation of light reflection layer 2: placing a roll of flexible carrier film 1 on a production line and adjusting the tension, coating a transparent resin stock solution on a forming transfer roller, on which a corresponding convex microstructure for rolling microscopic reflective concave platforms 21 and microscopic grooves 22 is precisely engraved, and the microscopic reflective concave platforms 21 and microscopic grooves 22 are continuously rolled out on the continuously moving flexible carrier film 1 through a transfer process, the rotation speed of the forming transfer roller is controlled during the rolling process, and the resin stock solution at the rolling location is cured using a UV cold light source (the wire 4 may be treated before the resin transfer is coated to avoid the resin curing on the wire 4, or the resin stock solution on the wire 4 may be removed before the resin stock solution is cured, and the resin on the wire 4 may be scraped off after curing for subsequent processing);

[0044] S3, preparing a conductive film 5 on the microscopic reflective concave platform 21 and the microscopic groove 22; the conductive film 5 is electrically connected to the wire 4 and can be energized; in this embodiment, a vacuum sputtering coating method is used to prepare the conductive film 5 on the microscopic reflective concave platform 21 and the microscopic groove 22, and a conductive indium tin alloy target is generally used for vacuum sputtering coating; a graphene conductive material or an organic conductive polymer can also be coated on the microscopic reflective concave platform 21 and the microscopic groove 22 by a spraying method to form a conductive film 5;

[0045] S4, vacuum sputtering coating of the transition layer 31: the transition layer 31 is coated on the light reflection layer 2 by using a vacuum magnetron sputtering coating device, and the transition layer 31 fills the microscopic reflective concave platform 21 and the micro groove 22 to be smooth and flat;

[0046] S5, vacuum sputtering coating of the base layer 32: coating the base layer 32 on the transition layer 31, and controlling the coating thickness to reach the set requirements;

[0047] S6. Vacuum sputtering coating of the composite stacking layer 33: Then, the composite stacking layer 33 is formed by coating the base layer 32 several times, and the thickness of each coating layer is controlled to meet the set requirements.

[0048] The steps S4-S6 are continuously produced by roll-to-roll processing.

[0049] When the production conditions are met, steps S2-S6 or steps S1-S6 can also be continuously produced by roll-to-roll processing to facilitate large-scale batch production. When roll-to-roll processing is adopted, a transition buffer and a tension adjustment mechanism can be set on the production line to adjust to avoid the coil being too tight or too loose, and the production feed speed is controlled to meet the requirements. The coated coil can then be cut into a suitable size as required.

[0050] The above description is only a specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flexible holographic transparent imaging film, comprising a flexible carrier film (1), a light reflecting layer (2) and a transparent holographic imaging layer (3) arranged in sequence, wherein the flexible carrier film (1) comprises a transparent PET, PVC or TPU film, and is characterized in that: A conductive wire (4) is provided between the flexible carrier film (1) and the light reflective layer (2); microscopic reflective concave terraces (21) are arranged in the light reflective layer (2); microscopic grooves (22) are provided between the microscopic reflective concave terraces (21) and are connected to each other or to the conductive wire (4) through the microscopic grooves (22); the transparent holographic imaging layer (3) comprises a transition layer (31), a primer layer (32) and a composite superposition layer (33) which are arranged in sequence; the transition layer (31) fills and smoothes the microscopic reflective concave terraces (21) and the microscopic grooves (22) in the light reflective layer (2); the primer layer (32) comprises a metal oxide layer; the composite superposition layer (33) comprises at least two layers of reflective coatings or refractive coatings formed by vacuum coating of different coating materials; a conductive film (5) is also provided on the microscopic reflective concave terraces (21) and the microscopic grooves (22); the left and right ends of the conductive film (5) are respectively connected to the conductive wire (4); the conductive film (5) The thickness is smaller than the depth of the microscopic reflective concave platform (21).

2. The flexible holographic transparent imaging film according to claim 1, characterized in that: The thickness of the light reflecting layer (2) is 50-300 micrometers; the directional reflectivity R of the light reflecting layer (2) is ≥45%.

3. The flexible holographic transparent imaging film according to claim 1 or 2, characterized in that: The transition layer (31) comprises non-conductive silicon oxide, silicon dioxide or silicon nitride; the base layer (32) comprises titanium oxide or aluminum oxide; the composite stacking layer (33) comprises an aluminum oxide or niobium oxide coating, and each coating layer in the composite stacking layer (33) has a thickness of 10-50 nanometers.

4. The flexible holographic transparent imaging film according to claim 1 or 2, characterized in that: The transmittance of the prepared imaging film is 70%-75%.

5. A flexible holographic transparent imaging screen, characterized in that: It is cut and processed by the flexible holographic transparent imaging film described in any one of claims 1 to 4.

6. The flexible holographic transparent imaging screen according to claim 5, characterized in that: A clamping seat (6) is provided at the upper end of the cut flexible holographic transparent imaging film, and a tensioning control device (7) is provided at the lower end of the flexible holographic transparent imaging film. The tensioning control device (7) comprises a guide roller (71), a tension measuring roller (72) and a tensioning driving roller (73). The lower end of the flexible holographic transparent imaging film is wound around the tensioning driving roller (73) via the guide roller (71) and the tension measuring roller (72). Both ends of the tensioning driving roller (73) are respectively provided with conductive rings (74) in contact with the wire (4). The tensioning driving roller (73) is connected to a servo motor. The tension measuring roller (72), the conductive ring (74) and the servo motor are electrically connected to a control circuit. The control circuit controls the servo motor to fine-tune its rotation according to the tension measured by the sensor in the tension measuring roller (72) so as to tension the flexible holographic transparent imaging film, and outputs a controllable current to the flexible holographic transparent imaging film via the conductive ring (74) and the wire (4).

7. The flexible holographic transparent imaging screen according to claim 6, characterized in that: The clamping fixing seat (6) comprises a fixed clamping plate (61) and a tensioning adjustment clamping plate (62); the tensioning driving roller (73) is provided with a fixed clamping ring (731) and a clamping adjustment clamping ring (732); the fixed clamping plate (61) and the tensioning adjustment clamping plate (62) are respectively used to fix the upper end of the tensioned flexible holographic transparent imaging film; the fixed clamping ring (731) and the clamping adjustment clamping ring (732) are respectively used to fix the lower end of the tensioned flexible holographic transparent imaging film; after the flexible holographic transparent imaging film is tensioned, the fine-tuning rotation angle of the tensioning driving roller (73) is less than 270°.

8. The method for preparing the flexible holographic transparent imaging screen according to claim 7, characterized in that: The preparation of the flexible holographic transparent imaging film comprises the following steps: S1, pressing the conductors (4) on both sides of the flexible carrier film (1) to fit the required size; S2, preparation of the light reflective layer (2): a roll of a flexible carrier film (1) is placed on a production line and the tension is adjusted, a resin stock solution is sprayed onto a forming transfer roller, the forming transfer roller is precisely engraved with corresponding raised microstructures for rolling microscopic reflective concave platforms (21) and microscopic grooves (22), the microscopic reflective concave platforms (21) and microscopic grooves (22) are continuously rolled onto the continuously moving flexible carrier film (1) through a transfer process, the rotation speed of the forming transfer roller is controlled during the rolling process, and the resin stock solution at the rolling location is solidified using a UV cold light source; S3, preparing a conductive film (5) on the microscopic reflective concave platform (21) and the microscopic groove (22), and the left and right ends of the conductive film (5) are electrically connected to the wire (4) respectively; S4, vacuum sputtering coating of the transition layer (31): using vacuum magnetron sputtering coating equipment to coat the transition layer (31) on the light reflection layer (2), wherein the transition layer (31) fills the microscopic reflection concave platform (21) and the microscopic groove (22) to be smooth and flat; S5, vacuum sputtering coating of the base layer (32): coating the base layer (32) on the transition layer (31), and controlling the coating thickness to reach a set requirement; S6, vacuum sputtering coating of the composite superimposed layer (33): coating the base layer (32) several times to form the composite superimposed layer (33), and controlling the thickness of each coating layer to meet the set requirements.

9. The method for preparing the flexible holographic transparent imaging screen according to claim 8, characterized in that: In the step S3, a vacuum sputtering coating method is used to prepare a conductive film (5) on the microscopic reflective concave platform (21) and the micro groove (22).

10. The method for preparing the flexible holographic transparent imaging screen according to claim 8, characterized in that: The steps S4-S6 are continuously produced by roll-to-roll processing.

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