3D digital human holographic projection equipment capable of improving optical image definition

Abstract

The invention relates to the technical field of projection imaging, in particular to 3D digital human holographic projection equipment capable of improving optical image definition, which comprises a holographic cabin, a photosensitive sensor, a driving device, a filter film, an adjusting assembly, a sliding plate, a fixing assembly and a fixing plate, the holographic cabin is composed of a cabin body and a holographic screen, and the holographic screen is fixedly installed in the cabin body. The photosensitive sensor is fixedly mounted on the cabin body; an adjusting cavity is formed in the cabin body, a driving device is installed at the top end of the adjusting cavity, the light filtering film and the driving device are coaxially installed, an adjusting assembly is arranged below the driving device, the sliding plate is slidably installed in the adjusting cavity, the driving device drives the sliding plate to vertically slide through the adjusting assembly, and the sliding plate pulls the light filtering film to move synchronously; the fixing assemblies are symmetrically arranged in the adjusting cavity, when the filter film stops moving, the driving device drives the fixing plate to fix the filter film through the fixing assemblies, the filter film is unfolded and rolled through sliding motion, and then the problem that imaging of the holographic cabin is affected due to the fact that external light is strong is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of projection imaging, and in particular to a 3D digital human holographic projection device capable of improving the clarity of optical images. Background Art

[0002] The holographic cabin is a virtual reality technology based on holographic projection technology. It projects virtual scenes onto the holographic screen by using technologies such as light field projection and cross imaging, allowing people to observe realistic three-dimensional images in a specific area and interact with virtual objects.

[0003] The holographic cabin used for children's teaching simulation demonstrations usually adopts the holographic image of a two-dimensional 3D digital person to attract children's interest in watching, and then conduct demonstrations. The holographic cabin usually consists of a cabin body and a holographic screen. The cabin body is equipped with an LED display and a backlight screen. The character image is transferred from the computer to the LED display screen, and then the LED display screen emits light to illuminate the backlight screen in the cabin, thereby causing interference and refraction of light, thereby realizing holographic projection imaging in the cabin.

[0004] During the use of the holographic cabin, when the external light is strong, the external light is projected onto the holographic screen, and part of the light is refracted, which in turn interferes with the light and affects the interference relationship of the light, which in turn causes the holographic simulation image in the holographic cabin to appear unclear, thereby affecting the effect of the holographic simulation demonstration.

[0005] To this end, the prior art proposes a projector, which arranges components so that at least one of the input light beam and the spatial light modulator moves relative to the other, thereby increasing the sharpness of the light spot formed by the hologram on the playback plane and reducing the laser speckle. However, the problem of unclear imaging caused by strong external light is still not solved.

[0006] In view of this, we propose a 3D digital human holographic projection device that can improve the clarity of optical images. Summary of the invention

[0007] The object of the present invention is to provide a 3D digital human holographic projection device that can improve the clarity of optical images, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: A 3D digital human holographic projection device capable of improving the clarity of an optical image comprises a holographic cabin, a light-sensitive sensor, a driving device, a filter film, an adjustment component, a slide plate, a fixing component and a fixing plate; the holographic cabin is composed of a cabin body and a holographic screen, a holographic screen is fixedly installed in the cabin body, the cabin body is used for holographic imaging, and the holographic screen is used to enhance the naked-eye 3D effect and the three-dimensionality of the holographic imaging; the light-sensitive sensor is fixedly installed on the cabin body, and the light-sensitive sensor is used to detect the intensity of external light; an adjustment cavity is provided on the cabin body, a stop plate is provided on one side of the adjustment cavity, a driving device is installed on the top of the adjustment cavity, the light-sensitive film is coaxially installed with the driving device, and the driving device An adjustment component is provided below the device, and the slide plate is slidably installed in the adjustment cavity. When the light-sensitive sensor detects that the light is strong, the driving device drives the slide plate to slide vertically through the adjustment component, and the slide plate pulls the filter film to move synchronously. The slide plate pulls the filter film to move vertically downward, so that the filter film is closely attached to the holographic screen, and the external light is filtered to reduce the influence of the external light on the holographic imaging, and the clarity of the holographic imaging is improved; the fixing components are symmetrically arranged in the adjustment cavity. When the filter film stops moving, the driving device drives the fixing plate to fix the filter film through the fixing component, and the fixing plate prevents the filter film from shaking, which affects the filtering effect of the filter film on the external light.

[0009] Preferably, the driving device includes a motor, a rotating shaft and a rotating drum; the motor is fixedly installed at the top of the adjusting cavity; one end of the rotating shaft is fixedly connected to the motor, and a driving block is provided on the other end of the rotating shaft, and a limit plate is provided in front of the driving block; the rotating drum is fixedly installed at the middle end of the rotating shaft, and a filter film is installed on the rotating drum. The start-up of the motor is controlled by a photosensor. When the external light is strong, the photosensor sends an electrical signal to drive the motor to rotate forward. When the external light returns to normal levels, the photosensor sends an electrical signal to drive the motor to reverse. When the motor rotates, it will drive the rotating shaft to rotate synchronously.

[0010] Preferably, the adjusting assembly comprises a driving wheel, a driven wheel, a driving shaft, an inner sleeve, a baffle, a tension spring, an outer sleeve and a reciprocating spring; the driving wheel is located in the adjusting chamber and is fixedly connected to the rotating shaft; the driven wheel is arranged vertically with the driving wheel, the driving wheel rotates synchronously with the rotation, the driving wheel meshes with the driven wheel during the rotation, drives the driven wheel to rotate, thereby realizing the reversal of movement, the driven wheel is fixedly connected to the driving shaft; the driving shaft is rotatably installed in the adjusting chamber, and the driving shaft is provided with a thread; the inner sleeve is slidably installed with the driving shaft, the inner side of the inner sleeve is provided with a screw groove that cooperates with the driving shaft, when the driving shaft rotates, the screw groove on the inner sleeve is squeezed by the thread thereon, thereby driving the inner sleeve to slide vertically up and down along the driving shaft, and a telescopic chamber is provided on the outer side of the inner sleeve; the baffle is rotatably installed in the telescopic chamber, and the baffle is connected to the inner wall of the telescopic chamber by a tension spring; the inner sleeve is slidably installed in the outer sleeve; When the slider moves downward, the filter membrane is pulled to cover the holographic screen and filter the external light. When the slider moves to the bottom, the outer sleeve contacts the inner wall of the adjusting chamber and remains fixed. At this time, the inner sleeve continues to slide downward under the action of the driving shaft. During the sliding process, the inner sleeve drives the baffle to move synchronously. During the movement, the baffle is squeezed by the outer sleeve, and the baffle shrinks into the telescopic chamber. The inner sleeve continues to slide in the outer sleeve and contacts the reciprocating spring in the outer sleeve to squeeze the reciprocating spring. At this time, the screw groove on the inner sleeve is just disengaged from the screw thread on the driving shaft, and the inner sleeve no longer rotates. Under the action of the reciprocating spring and the driving shaft, the inner sleeve performs a slight shaking motion.

[0011] Preferably, a blocking block is provided on the baffle plate, and a slot corresponding to the blocking block is provided on the fixed cavity. The cooperation between the blocking block and the slot improves the supporting effect of the baffle plate on the outer sleeve, avoiding the shaking of the outer sleeve under the action of gravity. At the same time, the lifting effect of the baffle plate on the outer sleeve is improved. When the outer sleeve rises and resets, the blocking block engages with the slot, which increases the force of the baffle plate on the outer sleeve, thereby making the rise of the outer sleeve stable, thereby ensuring the stability of the skateboard movement.

[0012] Preferably, a slope is provided on the fixed cavity, which reduces the friction between the baffle and the fixed cavity, thereby promoting the contraction of the baffle, so that the baffle can enter the telescopic cavity more smoothly, and the inner sleeve no longer drives the outer sleeve to move.

[0013] Preferably, the fixing assembly comprises a driving sleeve, a driving wheel, a transmission wheel, a sliding rod, a sliding block, a tensioning plate, a pushing plate, a pressing plate, a pushing rod and a return spring; the driving sleeve is slidably mounted on the rotating shaft, the driving sleeve is provided with a driving groove that cooperates with the driving block, and an elastic resistance point is provided at the end point of the driving groove; the driving wheel is fixedly connected to the driving sleeve, and a transmission wheel is provided below the driving wheel, and the driving block on the rotating shaft drives the driving sleeve to slide horizontally through the driving groove, and the driving sleeve pushes the driving wheel to slide synchronously. When the driving wheel contacts the transmission wheel, the driving block just moves to the top of the driving groove, and the driving block drives the driving sleeve to rotate synchronously under the rotation action of the rotating shaft, and the driving sleeve drives the driving wheel to rotate, and the driving wheel drives the transmission wheel to rotate, and the elastic resistance point is used to increase the force of the driving groove on the driving block, and then fix the driving block, and when the rotating shaft is reversed, the driving block first drives the driving shaft to rotate synchronously through the driving groove, and when the movement of the driving sleeve is hindered by external force, the driving block disengages from the elastic resistance point, driving the driving sleeve to slide horizontally; the transmission wheel is fixedly connected to the sliding rod The slide bar is rotatably installed in the adjustment cavity through a bearing; the slide bar is provided with a thread; the slider is slidably installed on the slide bar, and a screw groove cooperating with the slide bar is provided on the inner side of the slider, and the slider is fixedly connected with the tensioning plate; the tensioning plate is located between the slide plate and the filter film, the slide bar drives the slider to slide vertically downward, and the slider drives the tensioning plate to slide vertically downward, and the tensioning plate flattens the filter film to ensure that the filter film and the holographic screen fit closely; the push plate is an L-shaped structure, and the push plate is slidably installed in the adjustment cavity, and the A squeezing block is provided on the push plate; an squeezing groove cooperating with the push plate is provided on the pressure plate, and a push rod is fixedly installed on the pressure plate; the reset spring is nested on the push rod, and the pressure plate is connected to the inner wall of the adjustment cavity through a reciprocating spring; the push rod is fixedly connected to the fixed plate, and the tensioning plate contacts the push plate during the vertical downward sliding process, and the tensioning plate drives the push rod to move vertically downward, and the push rod pushes the pressure plate to move in the direction of the holographic screen through the squeezing block, and the pressure plate drives the fixed plate to move synchronously through the push rod, and the fixed plate fixes the filter film.

[0014] Preferably, both ends of the driving groove are hemispherical structures; the hemispherical structure fits with the driving block, and the hemispherical structure enhances the contact area between the driving sleeve and the driving block, thereby enhancing the force of the driving block on the driving groove, thereby promoting the rotation of the driving sleeve and ensuring the stability of operation.

[0015] Preferably, the fixing plate is provided with striped patterns, which are used to enhance the friction between the fixing plate and the filter film, thereby improving the fixing effect of the filter film and preventing the filter film from shaking, affecting the filtering effect, and causing unclear holographic imaging.

[0016] Preferably, the height of the slide plate is less than that of the tensioning plate. The low height of the slide plate prevents the slide plate from contacting the push plate during the descent process, and thus prevents the push plate from pushing the fixing plate to fix the filter film, thereby preventing the tensioning plate from sliding down to level the filter film.

[0017] Preferably, the slide plate is provided with a cleaning felt, which cleans the surface of the holographic screen during the vertical sliding of the slide plate to prevent dust from forming on the holographic screen and affecting the fit of the filter film, thereby affecting the overall filtering effect and resulting in poor holographic imaging effect.

[0018] Compared with the prior art, the present invention has the following beneficial effects: A 3D digital human holographic projection device that can improve the clarity of optical images. The device achieves the fitting of the filter film and the holographic screen by adjusting the coordination of the components and the fixed components, thereby filtering the external light, thereby avoiding the phenomenon of poor holographic imaging caused by strong external light.

[0019] A 3D digital human holographic projection device can improve the clarity of optical images. The device cleans the surface of the holographic screen through the vertical sliding of a skateboard, thereby preventing the holographic screen and the filter film from being contaminated with dust, which would affect the holographic imaging effect.

[0020] A 3D digital human holographic projection device that can improve the clarity of optical images. The device achieves the leveling of the filter film through a fixed component, thereby improving the fitting effect of the filter film and the holographic screen, thereby avoiding the influence of external light and improving the holographic imaging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A half-section schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A local enlarged view of point A; Figure 3 For the present invention Figure 1 A local enlarged view of point B; Figure 4 A vertical cross-sectional view of the overall structure of the present invention; Figure 5 For the present invention Figure 4 A local enlarged view of point C; Figure 6 It is a schematic diagram of the adjustment component and the fixing component of the present invention; Figure 7 A half-section schematic diagram of an adjustment component of the present invention; Figure 8 It is an overall schematic diagram of the fixing assembly of the present invention; Fig. 9 It is a half-section schematic diagram of the drive sleeve of the present invention.

[0022] In the figure: 1. holographic cabin; 11. cabin body; 111. adjustment cavity; 112. stop plate; 12. holographic screen; 2. Photosensitive sensor; 3. driving device; 31. motor; 32. rotating shaft; 321. driving block; 322. limiting plate; 33. rotating drum; 4. Filter film; 5. Adjustment assembly; 51. Driving wheel; 52. Driven wheel; 53. Driving shaft; 54. Inner bushing; 541. Telescopic chamber; 55. Baffle; 56. Extension spring; 57. Outer bushing; 571. Fixed chamber; 572. Inclined surface; 58. Reciprocating spring; 6. Skateboard; 7. Fixing assembly; 71. Driving sleeve; 711. Driving groove; 712. Elastic resistance point; 713. Hemispherical structure; 72. Driving wheel; 73. Transmission wheel; 74. Sliding rod; 75. Sliding block; 76. Tensioning plate; 77. Push plate; 78. Pressing plate; 79. Push rod; 7010. Return spring; 8. Fixed plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] A technical solution provided by the present invention: like Figures 1 to 9As shown, a 3D digital human holographic projection device capable of improving the clarity of an optical image comprises a holographic cabin 1, a photosensitive sensor 2, a driving device 3, a filter film 4, an adjusting component 5, a sliding plate 6, a fixing component 7 and a fixing plate 8; the holographic cabin 1 is composed of a cabin body 11 and a holographic screen 12, the holographic screen 12 is fixedly installed in the cabin body 11, the cabin body 11 is used to generate a holographic image of a two-dimensional 3D digital human to attract users, and at the same time, the image of the holographic image can be controlled for simulation demonstration, an LED display screen is installed on the upper surface of the cabin body 11, and a backlight screen is installed on the side of the cabin body 11 opposite to the holographic screen 12. When the holographic cabin 1 is imaging, a digital image is input into the holographic cabin 1 through a computer, and the digital image is imaged onto the LED display screen, and the optical image emitted by the LED display screen is received by the backlight plate, and then a 3D hologram is projected in the cabin body 11 for users to watch, and at the same time, the holographic screen 12 is used to control the image of the holographic image for simulation demonstration. Enhance the effect of naked-eye 3D, enhance the authenticity of holographic projection, and thus ensure the user's use effect; the photosensitive sensor 2 is fixedly installed on the cabin 11, and the photosensitive sensor 2 is used to detect the intensity of external light; an adjustment cavity 111 is opened on the cabin 11, and a stop plate 112 is provided on one side of the adjustment cavity 111, and a driving device 3 is installed on the top of the adjustment cavity 111, and the filter film 4 is coaxially installed with the driving device 3, and an adjustment component 5 is provided below the driving device 3, and the slide plate 6 is slidably installed in the adjustment cavity 111. When the photosensitive sensor 2 detects that the light is strong, the driving device 3 drives the slide plate 6 to slide vertically through the adjustment component 5, and the slide plate 6 pulls the filter film 4 to move synchronously, and the slide plate 6 pulls the filter film 4 to move vertically downward, so that the filter film 4 is closely attached to the holographic screen 12, and the external light is filtered to reduce the influence of the external light on the holographic imaging, thereby improving the clarity of the holographic imaging; The holographic screen 12 is a touch screen, and the interaction function with the 3D digital human can be realized by clicking and touching the holographic screen 12. The interaction functions include touch interaction, text interaction, and voice interaction. The touch interaction triggers the corresponding words and actions of the 3D image by the user clicking on the head, arms, legs, chest, abdomen and other parts. The touch interaction provides customized touch interaction, and the user sets the touch parts, character words, character actions and other customized touch interactions. The text interaction allows the user to send text based on the chat window to trigger the corresponding text reply of the 3D digital human, and at the same time, supports the dialogue of world knowledge and character content. The voice interaction can make the 3D digital human perform the demonstration effect of singing and dancing through voice commands. The driving device 3 includes a motor 31, a rotating shaft 32 and a rotating drum 33; the motor 31 is fixedly installed at the top of the adjusting chamber 111; one end of the rotating shaft 32 is fixedly connected to the motor 31, and a driving block 321 is provided on the other end of the rotating shaft 32, and a limiting plate 322 is provided in front of the driving block 321; the rotating drum 33 is fixedly installed at the middle end of the rotating shaft 32, and a filter film 4 is installed on the rotating drum 33. The start of the motor 31 is controlled by the photosensor 2. When the external light is strong, the photosensor 2 sends an electrical signal to drive the motor 31 to rotate forward. When the motor 31 rotates, it will drive the rotating shaft 32 to rotate synchronously. 32 will drive the rotating drum 33 to rotate synchronously, and the rotating drum 33 will unwind the filter film 4. When the external light returns to a normal level, the photosensor 2 sends an electrical signal to drive the motor 31 to reverse. When the motor 31 rotates, it will drive the rotating shaft 32 to rotate synchronously. The rotating shaft 32 will drive the rotating drum 33 to rotate synchronously, and the rotating drum 33 will rewind the filter film 4. The fixing components 7 are symmetrically arranged in the adjustment cavity 111. When the filter film 4 stops moving, the driving device 3 drives the fixing plate 8 to fix the filter film 4 through the fixing components 7. The fixing plate 8 prevents the filter film 4 from shaking, which affects the filtering effect of the filter film 4 on the external light.

[0025] The driving wheel 51 is located in the adjusting chamber 111 and is fixedly connected to the rotating shaft 32; the driven wheel 52 is arranged vertically with the driving wheel 51, and the driving wheel 51 rotates synchronously with the rotating shaft 32. The driving wheel 51 meshes with the driven wheel 52 during rotation, driving the driven wheel 52 to rotate, thereby realizing the reversal of movement, and the driven wheel 52 is fixedly connected to the driving shaft 53; the driving shaft 53 is rotatably installed in the adjusting chamber 111, and the driving shaft 53 is rotatably installed with the adjusting chamber 111 through a bearing, and a thread is provided on the driving shaft 53; the inner sleeve 54 is slidably installed with the driving shaft 53, and a screw groove matching the driving shaft 53 is provided on the inner side of the inner sleeve 54. When the driving shaft 53 rotates, the screw groove on the inner sleeve 54 is squeezed by the thread thereon, thereby driving the inner sleeve 54 to slide vertically up and down along the driving shaft 53, and a telescopic chamber 541 is provided on the outer side of the inner sleeve 54; The baffle 55 is rotatably installed in the telescopic cavity 541, and the baffle 55 is connected to the inner wall of the telescopic cavity 541 through a tension spring 56; the inner sleeve 54 is slidably installed in the outer sleeve 57; the outer sleeve 57 is provided with a fixing cavity 571 that cooperates with the telescopic cavity 541; a reciprocating spring 58 is fixedly installed in the outer sleeve 57; the outer sleeve 57 is fixedly connected to the slide plate 6, and the slide plate 6 is fixedly connected to the filter film 4. During the vertical sliding process of the inner sleeve 54, the baffle 55 drives the outer sleeve 57 to slide synchronously, and the outer sleeve 57 drives the slide plate 6 to slide synchronously. During the downward sliding process of the slide plate 6, the filter film 4 is pulled to coat the holographic screen 12 to filter the external light. The slide plate 6 is provided with a cleaning felt, and the cleaning felt on the slide plate 6 cleans the surface of the holographic screen 12 during the vertical sliding process of the slide plate 6 to avoid dust on the holographic screen 12, which affects the fitting of the filter film 4, thereby affecting the overall filtering effect and resulting in poor holographic imaging effect; When the slide plate 6 moves to the bottom, the outer sleeve 57 contacts the inner wall of the adjustment chamber 111 and remains fixed. At this time, the inner sleeve 54 continues to slide downward under the action of the drive shaft 53. During the sliding process, the inner sleeve 54 drives the baffle 55 to move synchronously. The baffle 55 is squeezed by the outer sleeve 57 during the movement. The baffle 55 shrinks into the telescopic chamber 541. The inner sleeve 54 continues to slide in the outer sleeve 57 and contacts the reciprocating spring 58 in the outer sleeve 57 to squeeze the reciprocating spring 58. At this time, the screw groove on the inner sleeve 54 is just disengaged from the screw thread on the drive shaft 53, and the inner sleeve 54 no longer rotates. The inner sleeve 54 performs a slight shaking motion under the action of the reciprocating spring 58 and the drive shaft 53. The baffle plate 55 is provided with a block, and the fixed cavity 571 is provided with a slot corresponding to the block. The cooperation between the block and the slot improves the supporting effect of the baffle plate 55 on the outer sleeve 57, thereby preventing the outer sleeve 57 from shaking under the action of gravity. At the same time, the lifting effect of the baffle plate 55 on the outer sleeve 57 is improved. When the outer sleeve 57 rises and resets, the block and the slot are engaged, thereby increasing the force of the baffle plate 55 on the outer sleeve 57, thereby making the outer sleeve 57 rise stably, thereby ensuring the stability of the movement of the slide plate 6; the fixed cavity 571 is provided with an inclined surface 572, and the inclined surface 572 on the fixed cavity 571 reduces the friction between the baffle plate 55 and the fixed cavity 571, thereby promoting the contraction of the baffle plate 55, so that the baffle plate 55 can enter the telescopic cavity 541 more smoothly, thereby making the inner sleeve 54 no longer drive the outer sleeve 57 to move; When the external light is strong, the photosensor 2 sends an electrical signal to control the motor 31 to rotate forward, the motor 31 drives the shaft 32 to rotate synchronously, the shaft 32 drives the drum 33 to unwind the filter film 4, and at the same time, the shaft 32 drives the driving wheel 51 fixed thereto to rotate synchronously, the driving wheel 51 drives the driven wheel 52 to rotate, the driven wheel 52 drives the driving shaft 53 to rotate synchronously, the driving shaft 53 drives the inner sleeve 54 to slide vertically downward through the thread, the inner sleeve 54 drives the baffle 55 to move vertically downward, the baffle 55 pulls the outer sleeve 57 to slide downward synchronously through the block thereon, and the outer sleeve 57 The slide plate 6 is driven to slide vertically downward, and the slide plate 6 pulls the filter film 4 to stretch and coat the holographic screen 12. When the outer sleeve 57 moves to the bottom of the adjustment cavity 111, the outer sleeve 57 stops moving, and the inner sleeve 54 still slides vertically downward under the action of the drive shaft 53. The inner sleeve 54 drives the baffle 55 to move synchronously, and the baffle 55 is separated from the outer sleeve 57. During the vertical downward movement of the baffle 55, the baffle 55 is squeezed by the inner wall of the outer sleeve 57 and is retracted into the telescopic cavity 541. The inner sleeve 54 continues to move downward and disengages from the thread on the drive shaft 53 and no longer slides. The inner sleeve 54 squeezes the reciprocating spring 58.

[0026] The driving sleeve 71 is slidably mounted on the rotating shaft 32. A driving groove 711 is provided on the driving sleeve 71 to cooperate with the driving block 321. An elastic resistance point 712 is provided at the end of the driving groove 711. The driving wheel 72 is fixedly connected to the driving sleeve 71. A transmission wheel 73 is provided below the driving wheel 72. The driving block 321 on the rotating shaft 32 drives the driving sleeve 71 to slide horizontally through the driving groove 711. The driving sleeve 71 pushes the driving wheel 72 to slide synchronously. When the driving wheel 72 contacts the transmission wheel 73, the driving block 321 just moves. When the inner sleeve 54 starts to drive the outer sleeve 57 to move synchronously, the driving sleeve 71 pushes the driving wheel 72 to contact the transmission wheel 73, thereby driving the slider 74 to slide vertically. The slider 74 slides vertically to drive the tensioning plate 75 to move synchronously. When the tensioning plate 75 does not move to the outer sleeve 57, the filter film unwound by the rotating drum 33 is 4 is pushed to make it follow itself into the bottom of the adjustment cavity 111, so as to ensure the subsequent leveling effect of the filter film 4 and the fit between the filter film 4 and the holographic screen 12. The driving block 321 drives the driving sleeve 71 to rotate synchronously under the rotation of the shaft 32, and the driving sleeve 71 drives the driving wheel 72 to rotate, and the driving wheel 72 drives the transmission wheel 73 to rotate. The elastic resistance point 712 is used to increase the force of the driving groove 711 on the driving block 321, and then fix the driving block 321. When the shaft 32 is reversed, the driving block 321 first passes through the driving groove 711 drives the driving shaft 53 to rotate synchronously. When the movement of the driving sleeve 71 is hindered by external force, the driving block 321 disengages from the elastic resistance point 712, driving the driving sleeve 71 to slide horizontally. The two ends of the driving groove 711 are hemispherical structures 713. The hemispherical structure 713 fits with the driving block 321. The hemispherical structure 713 increases the contact area between the driving sleeve 71 and the driving block 321, thereby increasing the force of the driving block 321 on the driving groove 711, thereby promoting the rotation of the driving sleeve 71 and ensuring the stability of the operation. The transmission wheel 73 is fixedly connected to the slide bar 74, and the slide bar 74 is rotatably installed in the adjustment cavity 111 through a bearing; the slide bar 74 is provided with a thread; the slider 75 is slidably installed on the slide bar 74, and a screw groove that cooperates with the slide bar 74 is opened on the inner side of the slider 75. The slider 75 is fixedly connected to the tensioning plate 76; the tensioning plate 76 is located between the slide plate 6 and the filter film 4, and the height of the slide plate 6 is less than the height of the tensioning plate 76. The low height of the slide plate 6 prevents the slide plate 6 from contacting the push plate 77 during the descent process. Therefore, the push plate 77 will not push the fixing plate 8 to fix the filter film 4, so that the tensioning plate 76 cannot slide down to level the filter film 4; the slide bar 74 drives the slider 75 to slide vertically downward, and the slider 75 drives the tensioning plate 76 to slide vertically downward, and the tensioning plate 76 levels the filter film 4 to ensure that the filter film 4 and the holographic screen 12 are closely attached. When the slide plate 6 drives the filter film 4 to move vertically downward, the tensioning plate 76 tensions the sliding filter film 4 to ensure that the filter film 4 is evenly separated from the rotating drum 33; The push plate 77 is an L-shaped structure, and the push plate 77 is slidably installed in the adjustment cavity 111. The push plate 77 is provided with an extrusion block; the pressure plate 78 is provided with an extrusion groove that cooperates with the push plate 77, and a push rod 79 is fixedly installed on the pressure plate 78; the reset spring 7010 is nested on the push rod 79, and the pressure plate 78 is connected to the inner wall of the adjustment cavity 111 through the reciprocating spring 58; the push rod 79 is fixedly connected to the fixed plate 8, and the tensioning plate 76 contacts the push plate 77 during the vertical downward sliding process, and the tensioning plate 76 drives the push rod 79 to move vertically downward. The push rod 79 pushes the pressure plate 78 to move in the direction of the holographic screen 12 through the extrusion block. 78 drives the fixing plate 8 to move synchronously through the push rod 79, and the fixing plate 8 fixes the filter film 4. The fixing plate 8 is provided with strip patterns, and the strip patterns are used to enhance the friction between the fixing plate 8 and the filter film 4, thereby improving the fixing effect of the filter film 4, avoiding the filter film 4 from shaking, affecting the filtering effect, and causing unclear holographic imaging; the fixing plate 8 is located at the middle end of the driving cavity, and the contact point between the push rod 79 and the tensioning plate 76 is located at the bottom end of the driving cavity. When the tensioning plate 76 moves to the bottom end, the fixing plate 8 at the middle end of the adjustment cavity 111 is pushed out to fix the filter film 4, thereby avoiding the occurrence of motion interference and ensuring the stability of the motion; When the rotating shaft 32 rotates forward, the driving block 321 on the rotating shaft 32 squeezes the driving groove 711 and drives the driving sleeve 71 to slide horizontally. The driving block 321 moves into the hemispherical structure 713 at the top of the driving groove 711. The driving block 321 drives the driving sleeve 71 to rotate synchronously through the driving groove 711. The driving sleeve 71 drives the driving wheel 72 to rotate synchronously. The driving wheel 72 drives the transmission wheel 73 to rotate. The transmission wheel 73 drives the sliding rod 74 to rotate synchronously. The sliding rod 74 drives the sliding block 75 to move vertically downward. The sliding block 75 drives the tensioning plate 76 to move vertically downward. When the tensioning plate 76 moves to the bottom end of the adjusting cavity 111, the tensioning plate 76 contacts the pushing plate 77, driving the pushing plate 77 to move downward synchronously. The pushing plate 77 pushes the extrusion groove of the pressing plate 78 through the extrusion block, thereby driving the pressing plate 78 to move along the direction of the holographic screen 12. The pressing plate 78 pushes the fixing plate 8 to move synchronously through the pushing rod 79, driving the pushing plate 77 to fix the filter film 4.

[0027] When the 3D digital human holographic projection device of this embodiment that can improve the clarity of optical images is in use, when the photosensor 2 detects that the external light is strong, the photosensor 2 sends an electrical signal to drive the motor 31 to rotate forward, and the motor 31 drives the rotating shaft 32 to rotate synchronously, and the rotating shaft 32 drives the rotating drum 33 to unwind the filter film 4. At the same time, the rotating shaft 32 drives the driving wheel 51 to rotate synchronously during the rotation process. At the same time, the rotating shaft 32 drives the driving shaft 53 to slide horizontally through the driving block 321, and the driving shaft 53 drives the transmission wheel 73 to slide synchronously; the driving wheel 51 rotates to drive the driven wheel 52 to rotate, and the driven wheel 52 drives the driving shaft 53 to rotate, and the driving shaft 53 drives the inner sleeve 54 to slide vertically downward, and the inner sleeve 54 drives the outer sleeve 57 to slide synchronously through the baffle 55, and the outer sleeve 57 drives the slide plate 6 to move downward synchronously, and the slide plate 6 pulls the filter film 4 to move synchronously; When the outer sleeve 57 moves to the bottom of the adjustment chamber 111, the outer sleeve 57 stops moving, and the inner sleeve 54 still slides vertically downward under the action of the drive shaft 53. The inner sleeve 54 drives the baffle 55 to move synchronously, and the baffle 55 is separated from the outer sleeve 57. During the vertical downward movement of the baffle 55, the baffle 55 squeezes the tension spring 56 under the pressure of the inner wall of the outer sleeve 57, and the baffle 55 is retracted into the telescopic chamber 541. The inner sleeve 54 continues to move downward and disengages from the thread on the drive shaft 53 and no longer slides. The inner sleeve 54 squeezes the reciprocating spring 58. At this time, the driving block 321 just moves to the top of the driving groove 711, and the driving sleeve 71 pushes the driving wheel 72 and the transmission wheel 73. The rotating shaft 32 drives the driving sleeve 71 to rotate synchronously through the driving block 321, and the driving sleeve 71 drives the transmission wheel 73 to rotate synchronously, and the driving wheel 72 drives the transmission wheel 73 to rotate, and the transmission wheel 73 drives the sliding rod 74 to rotate synchronously, and the sliding rod 74 drives the sliding block 75 to move vertically downward, and the sliding block 75 drives the tensioning plate 76 to move vertically downward. When the tensioning plate 76 moves to the bottom end of the adjustment cavity 111, the tensioning plate 76 contacts the pushing plate 77, and drives the pushing plate 77 to move downward synchronously, and the pushing plate 77 drives the pressing plate 78 to move along the direction of the holographic screen 12, and the pressing plate 78 squeezes the reset spring 7010, and at the same time, the pressing plate 78 drives the fixing plate 8 to move in the same direction through the pushing rod 79 to continue squeezing the filter film 4; When the photosensor 2 detects that the external light has returned to normal, the photosensor 2 sends an electrical signal to drive the motor 31 to reverse, and the motor 31 drives the rotating shaft 32 to reverse. The driving block 321 on the rotating shaft 32 remains fixed with the driving groove 711 under the action of the elastic resistance point 712, and the driving block 321 drives the driving sleeve 71 to rotate synchronously. The driving sleeve 71 drives the driving wheel 72 to reverse, and the driving wheel 72 drives the transmission wheel 73 to reverse, and the transmission wheel 73 drives the sliding rod 74 to reverse, and the sliding rod 74 drives the sliding block 75 to reset, and the sliding block 75 drives the tensioning plate 76 to reset. During the vertical upward movement of the tensioning plate 76, the tensioning plate 76 is separated from the push rod 79, and the push plate 77 is no longer subjected to the force of the tensioning plate 76. The reset spring 7010 is subjected to the external The force is reduced, the reset spring 7010 is reset and then pushes the pressure plate 78 to reset, the pressure plate 78 drives the fixing rod to reset through the push rod 79, and at the same time, the pressure plate 78 pushes the push plate 77 to reset through the extrusion groove. When the slider 75 moves and contacts the stop plate 112, the slider 75 is kept fixed by the force of the stop plate 112, so that the slider 75 applies a reverse force to the slide bar 74, so that the slide bar 74 remains fixed, the slide bar 74 acts on the transmission wheel 73, the transmission wheel 73 acts on the driving wheel 72, the driving wheel 72 acts on the driving sleeve 71, and the driving block 321 in the driving sleeve 71 is disengaged from the elastic resistance point 712 under the action of the reverse force, and the driving block 321 drives the driving shaft 53 to slide and reset through the driving groove 711; When the rotating shaft 32 is reversed, the inner sleeve 54 is engaged with the thread on the driving shaft 53 under the action of the reciprocating spring 58, and the inner sleeve 54 moves vertically upward, and the inner sleeve 54 drives the baffle 55 in the telescopic chamber 541 to move synchronously. When the baffle 55 moves to the fixed chamber 571, the baffle 55 extends from the telescopic chamber 541 into the fixed chamber 571 under the action of the tension spring 56, and the inner sleeve 54 drives the baffle 55 to continue to move upward, and the block on the baffle 55 enters the slot on the outer sleeve 57 and is fixed to the outer sleeve 57. The sleeve drives the outer sleeve 57 to move upward and reset synchronously through the baffle 55, and the outer sleeve 57 drives the slide plate 6 to move and reset synchronously. During the reversal of the rotating shaft 32, the rotating shaft 32 drives the rotating drum 33 to rotate synchronously, and the rotating drum 33 reels the filter film 4.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A 3D digital human holographic projection device capable of improving the clarity of an optical image, characterized in that: It comprises a holographic cabin (1), a photosensor (2), a driving device (3), a filter film (4), an adjustment component (5), a slide plate (6), a fixing component (7) and a fixing plate (8); The holographic cabin (1) is composed of a cabin body (11) and a holographic screen (12), and the holographic screen (12) is fixedly installed in the cabin body (11); The photosensor (2) is fixedly mounted on the cabin (11); The cabin (11) is provided with an adjustment cavity (111), a stop plate (112) is provided on one side of the adjustment cavity (111), a driving device (3) is installed at the top of the adjustment cavity (111), the filter film (4) is coaxially installed with the driving device (3), an adjustment component (5) is provided below the driving device (3), the slide plate (6) is slidably installed in the adjustment cavity (111), when the light sensor (2) detects strong light, the driving device (3) drives the slide plate (6) to slide vertically through the adjustment component (5), and the slide plate (6) pulls the filter film (4) to move synchronously; the fixing component (7) is symmetrically arranged in the adjustment cavity (111), when the filter film (4) stops moving, the driving device (3) drives the fixing plate (8) to fix the filter film (4) through the fixing component (7).

2. The holographic projection device according to claim 1, characterized in that: The driving device (3) comprises a motor (31), a rotating shaft (32) and a rotating drum (33); The motor (31) is fixedly mounted on the top of the adjustment cavity (111); One end of the rotating shaft (32) is fixedly connected to the motor (31); a driving block (321) is provided on the other end of the rotating shaft (32); a limiting plate (322) is provided in front of the driving block (321); The rotating drum (33) is fixedly mounted on the middle end of the rotating shaft (32), and a filter film (4) is mounted on the rotating drum (33).

3. The holographic projection device according to claim 2, characterized in that: The adjustment assembly (5) comprises a driving wheel (51), a driven wheel (52), a driving shaft (53), an inner shaft sleeve (54), a baffle (55), a tension spring (56), an outer shaft sleeve (57) and a reciprocating spring (58); The driving wheel (51) is located in the adjustment chamber (111) and is fixedly connected to the rotating shaft (32); The driven wheel (52) is arranged perpendicularly to the driving wheel (51), and the driven wheel (52) is fixedly connected to the driving shaft (53); The driving shaft (53) is rotatably mounted in the adjustment chamber (111), and a thread is provided on the driving shaft (53); The inner shaft sleeve (54) is slidably mounted on the drive shaft (53); a screw groove matching the drive shaft (53) is formed on the inner side of the inner shaft sleeve (54); and a telescopic cavity (541) is formed on the outer side of the inner shaft sleeve (54); The baffle plate (55) is rotatably mounted in the telescopic cavity (541), and the baffle plate (55) is connected to the inner wall of the telescopic cavity (541) via a tension spring (56); The inner shaft sleeve (54) is slidably mounted in the outer shaft sleeve (57); the outer shaft sleeve (57) is provided with a fixed cavity (571) that cooperates with the telescopic cavity (541); A reciprocating spring (58) is fixedly installed in the outer shaft sleeve (57); The outer shaft sleeve (57) is fixedly connected to the slide plate (6), and the slide plate (6) is fixedly connected to the filter film (4).

4. The holographic projection device according to claim 3, characterized in that: A clamping block is provided on the baffle (55), and a clamping slot corresponding to the clamping block is provided on the fixing cavity (571).

5. The holographic projection device according to claim 4, characterized in that: The fixing cavity (571) is provided with an inclined surface (572).

6. The holographic projection device according to claim 3, characterized in that: The fixing assembly (7) comprises a driving sleeve (71), a driving wheel (72), a transmission wheel (73), a sliding rod (74), a sliding block (75), a tensioning plate (76), a push plate (77), a pressure plate (78), a push rod (79) and a return spring (7010); The driving sleeve (71) is slidably mounted on the rotating shaft (32); a driving groove (711) cooperating with the driving block (321) is formed on the driving sleeve (71); and an elastic resistance point (712) is provided at an end point of the driving groove (711); The driving wheel (72) is fixedly connected to the driving sleeve (71), and a transmission wheel (73) is provided below the driving wheel (72); The transmission wheel (73) is fixedly connected to the slide rod (74); The slide rod (74) is provided with threads; The slider (75) is slidably mounted on the slide rod (74), a screw groove matching the slide rod (74) is provided on the inner side of the slider (75), and the slider (75) is fixedly connected to the tensioning plate (76); The tensioning plate (76) is located between the slide plate (6) and the filter film (4); The push plate (77) is an L-shaped structure, the push plate (77) is slidably mounted in the adjustment cavity (111), and a squeezing block is provided on the push plate (77); The pressing plate (78) is provided with an extrusion groove that cooperates with the push plate (77), and a push rod (79) is fixedly mounted on the pressing plate (78); The return spring (7010) is nested on the push rod (79), and the pressure plate (78) is connected to the inner wall of the adjustment chamber (111) via a reciprocating spring (58); The push rod (79) is fixedly connected to the fixing plate (8).

7. The holographic projection device according to claim 6, characterized in that: Both ends of the driving groove (711) are hemispherical structures (713); the hemispherical structure (713) fits closely with the driving block (321).

8. The holographic projection device according to claim 6, characterized in that: The fixing plate (8) is provided with stripe patterns.

9. The holographic projection device according to claim 6, characterized in that: The height of the slide plate (6) is smaller than the height of the tensioning plate (76).

10. The holographic projection device according to claim 9, characterized in that: The slide plate (6) is provided with a cleaning felt.

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