Recording and complaint interactive holographic evidence display stand

Abstract

The invention relates to the field of holographic display stands, in particular to a calling and complaint interactive holographic evidence display stand which comprises a display stand body, a glass cover, a fixing ring, a fixing cover and the like. A plurality of placing cavities are formed in the display stand; a glass cover is mounted on the display stand; a fixing ring is arranged in each placing cavity; each fixing ring is provided with a fixing cover, and the projectors are detachably connected with the fixing covers. And each fixing cover is provided with a plurality of air holes. According to the invention, stray light interference in ambient light is reduced through the optical filter, more accurate color restoration is ensured, and the consistency and authenticity of image colors are maintained especially under different ambient light, so that the image quality of the projector is improved, the display effect of the projector is optimized, and the viewing experience of audiences is improved; the distance between each optical filter and the lens of the projector is controlled through the positioning ring, so that the focusing function of the lens of the projector is prevented from being influenced by improper distance control.

Description

Technical Field

[0001] The invention relates to the field of holographic display stands, and in particular to an interactive holographic evidence display stand. Background Art

[0002] There are many ways to achieve 3D images on a holographic display stand. For the Pepper's Ghost effect, it uses glass or transparent film as a reflective surface, combined with a display screen below or on the side and an appropriate angle to create an image floating in the air. Display stands based on the Pepper's Ghost effect usually project two-dimensional graphics or video content through a bottom-mounted projector, but lighting in different occasions or at different times will affect the projection color. At the same time, in some complex lighting environments, external light will enter through the projection lens, causing the image to be blurred, thereby reducing the audience's viewing experience. Summary of the invention

[0003] In order to overcome the disadvantages that when a holographic display stand is projected, lighting in different occasions or at different times will affect the projection color, and in certain complex lighting environments, external light will enter through the projection lens, causing the image to be blurred, thereby reducing the audience's viewing experience, the present invention provides an interactive holographic evidence display stand.

[0004] The technical implementation scheme of the present invention is: an interactive holographic evidence display stand for mediation and prosecution, comprising a display stand, a glass cover and a fixing ring; a plurality of placement cavities are arranged in the display stand; a glass cover is installed on the display stand; a fixing ring is arranged in each placement cavity; it also comprises a fixing cover, a protective shell, a mounting plate, an optical filter and a driving assembly; a fixing cover is installed on each fixing ring, and the projector is detachably connected to the fixing cover; a plurality of air holes are arranged on each fixing cover; a plurality of optical filters are arranged in each fixing cover; a protective shell for protecting the optical filters is installed on each fixing cover; a connection port for facilitating the connection between the projector lens and the outside world is arranged on the protective shell; a mounting plate is rotatably connected in each fixing cover; a plurality of placement slots are arranged on each mounting plate, and no optical filter is installed in one of the placement slots on the mounting plate, and the remaining placement slots are detachably connected to adjacent optical filters; a driving assembly is installed in the display stand, and the mounting plate is connected to the driving assembly.

[0005] More preferably, the drive assembly includes a fixed plate, a motor, a ratchet and a pawl; a fixed plate is fixedly connected in each fixed cover; a motor is fixedly connected to each fixed plate; a ratchet is fixedly connected to each motor output end, and each motor output end is rotatably connected to an adjacent mounting plate; a plurality of pawls are rotatably connected to each mounting plate via a torsion spring, and each pawl is engaged with an adjacent ratchet.

[0006] More preferably, it also includes a spring telescopic rod and a curved block; a plurality of spring telescopic rods are fixedly connected to each mounting plate; and a curved block for fixing the filter is fixedly connected to the telescopic end of each spring telescopic rod, and each curved block is located at the edge of an adjacent placement groove; and a connecting portion is provided on each curved block.

[0007] More preferably, a positioning ring is further included; a positioning ring is fixedly connected in the placement groove of each mounting plate to assist in the manual placement of the filter.

[0008] More preferably, each inner annular surface of the placement groove and the curved block on the mounting plate are wrapped with soft cloth.

[0009] More preferably, it also includes an airbag and a first air tube; the output end of each motor is fixedly connected to an airbag; each airbag is made of elastic deformable material; the end of each airbag close to the projector is smaller than the end away from the projector; each airbag is connected to a plurality of first air tubes, and two adjacent first air tubes are rotatably connected to the airbag through a connecting tube; and a one-way valve is fixedly connected in each first air tube.

[0010] More preferably, each first air pipe opening faces a heat-prone part of the projector.

[0011] More preferably, it also includes a connecting block and a cleaning block; a connecting block is slidably connected between each fixed cover and the protective shell, and each connecting block is rotatably connected to the adjacent mounting plate; a cleaning block is fixedly connected to one side of each connecting block close to the mounting plate.

[0012] More preferably, a water storage box is also included; each connecting block is configured as a hollow structure, and a plurality of flow holes are opened on the connecting block; a water storage box containing distilled water is fixedly connected to each fixed cover; each connecting block is connected to an adjacent water storage box, and a solenoid valve is provided at the connecting portion between the connecting block and the adjacent water storage box.

[0013] More preferably, it also includes a second air pipe; a plurality of connection holes are provided on the mounting plate; each air bag is connected to a second air pipe for drying the filter, and the second air pipe is rotatably connected to the air bag through a fixed pipe; a one-way membrane is provided in each second air pipe.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention reduces the interference of stray light in ambient light through the filter, ensures more accurate color reproduction, and especially maintains the consistency and authenticity of image color under different ambient light, thereby improving the image quality of the projector and optimizing its display effect, and enhancing the viewing experience of the audience; The distance between each filter and the projector lens is controlled by a positioning ring to prevent the focusing function of the projector lens from being affected due to improper distance control; By manually moving the bending block, the bending block can limit and fix the filter, so that the filter can be smoothly inserted into the placement slot, so as to realize the quick replacement of the damaged filter and improve the work efficiency; The airbag is driven to rotate by the motor, so that the projector squeezes the airbag to reduce the volume of the airbag, so that the gas inside the airbag is ejected toward the projector through the first air pipe, thereby driving the air flow around the projector and improving the heat dissipation effect of the projector; The upper and lower surfaces of the filter in the placement groove are wiped by the cleaning block to clean the dust and impurities adhering to the filter, thereby preventing the adhered dust from affecting the performance of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the interactive holographic certificate display stand of the present invention; Figure 2 is a cross-sectional view of a display stand of the present invention; Figure 3 It is a cross-sectional view of the fixed cover of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting plate, the filter and the driving assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the ratchet, pawl, spring telescopic rod and curved block combination of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the positioning ring of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the airbag, the first trachea and the second trachea combined according to the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the connection block and the filter assembly of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the connection block, the cleaning block and the water storage box combination of the present invention.

[0016] The markings of the components in the accompanying drawings are as follows: 1-display stand, 1001-placing cavity, 2-glass cover, 3-fixing ring, 4-fixing cover, 4001-air vent, 5-protective shell, 5001-connecting port, 6-mounting plate, 6001-mounting slot, 6002-connecting hole, 7-projector, 8-filter, 101-fixing plate, 102-motor, 201-ratchet, 202-pawl, 301-spring telescopic rod, 302-bending block, 30201-connecting part, 303-positioning ring, 401-air bag, 402-first air pipe, 501-connecting block, 502-cleaning block, 503-water storage box, 601-second air pipe. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0018] Example 1 An interactive holographic evidence display stand, such as Figure 1-Figure 6 As shown, it includes a display stand 1, a glass cover 2 and a fixing ring 3; four placement cavities 1001 distributed in a rectangular shape are arranged in the display stand 1; the glass cover 2 is installed on the display stand 1; and a fixing ring 3 is arranged in each placement cavity 1001; The display stand 1 further comprises a fixed cover 4, a protective shell 5, a mounting plate 6, a filter 8 and a driving assembly; a fixed cover 4 is mounted on each fixed ring 3, and the projector 7 is detachably connected to the fixed cover 4; a plurality of air holes 4001 are arranged on the lower side of each fixed cover 4; three filters 8 are arranged in each fixed cover 4; a protective shell 5 is mounted on each fixed cover 4; a connecting port 5001 is arranged on the protective shell 5; a mounting plate 6 is rotatably connected in each fixed cover 4; four mounting grooves 6001 are arranged on each mounting plate 6, and no filter 8 is mounted in one of the mounting grooves 6001 on the mounting plate 6, and the remaining mounting grooves 6001 are detachably connected to adjacent filters 8; a driving assembly is installed in the display stand 1, and the mounting plate 6 is connected to the driving assembly, and according to the light of the projection environment and the change of projection requirements, the adjacent mounting plates 6 are driven to rotate by the driving assembly, so as to replace the filter 8 above the lens of the projector 7, so as to improve the quality of the holographic projection.

[0019] The driving assembly includes a fixed plate 101, a motor 102, a ratchet 201 and a pawl 202; a fixed plate 101 is fixedly connected in each fixed cover 4; a motor 102 is fixedly connected to each fixed plate 101; a ratchet 201 is fixedly connected to the output end of each motor 102, and each output end of the motor 102 is rotatably connected to an adjacent mounting plate 6; two pawls 202 are rotatably connected to each mounting plate 6 via a torsion spring, and each pawl 202 is meshed with an adjacent ratchet 201; the ratchet 201 is driven to rotate by the motor 102, thereby driving the pawl 202 and the mounting plate 6 to rotate.

[0020] The connection port 5001 on the protective shell 5 is configured to be in a flared shape.

[0021] It also includes a spring telescopic rod 301 and a bending block 302; four spring telescopic rods 301 are fixedly connected to each mounting plate 6; and each spring telescopic rod 301 is fixedly connected to a bending block 302 at the telescopic end, and each bending block 302 is located at the edge of an adjacent placement groove 6001; and each bending block 302 is provided with a connecting portion 30201.

[0022] It also includes a positioning ring 303; a positioning ring 303 is fixedly connected in the placement groove 6001 of each mounting plate 6.

[0023] The inner annular surface of each mounting groove 6001 and the curved block 302 on the mounting plate 6 are wrapped with soft cloth to prevent the curved block 302 from pressing on the edge of the filter 8 when the filter 8 is stuck in the mounting groove 6001, thereby preventing the edge of the filter 8 from being damaged.

[0024] When the holographic display stand 1 is projecting, lighting in different occasions or at different times will affect the projection color. At the same time, in some complex lighting environments, external light will enter through the projection lens, causing the image to be blurred, thereby reducing the audience's viewing experience.

[0025] The working steps of this embodiment are: The first step is to open the lower end of the fixed cover 4, install the projector 7 in the fixed cover 4, and then cover the lower end of the fixed cover 4. At this time, the connecting port 5001 of the protective shell 5 is aligned with the lens of the projector 7. By setting the connecting port 5001 to a flared shape, the connecting port 5001 conforms to the direction of the light path projected by the projector 7 to avoid blocking the light path and affecting the projection quality. Then open the protective shell 5 again, and then install three filters 8 with different performances in three of the mounting grooves 6001 of the mounting plate 6 respectively. At this time, the mounting groove 6001 on the mounting plate 6 where the filter 8 is not placed is aligned with the lens of the projector 7.

[0026] In the second step, according to the projection requirements, when the light environment outside the display stand 1 is complex, resulting in blurred projected images and affecting the audience's viewing experience, the motor 102 is started at this time, and based on the view from top to bottom, the motor 102 drives the ratchet 201 to rotate counterclockwise, and then the ratchet 202 drives the mounting plate 6 to rotate counterclockwise, so that the placement slot 6001 carrying the filter 8 is aligned with the lens of the projector 7, and the filter 8 is used to reduce the interference of stray light in the ambient light to ensure more accurate color reproduction, especially under different ambient light, to maintain the consistency and authenticity of the image color, thereby improving the image quality of the projector 7 and optimizing its display effect, and enhancing the audience's viewing experience. At the same time, the motor 102 can be controlled to rotate according to the on-site environment to replace filters 8 with different performances, so that there is no need for manual replacement, which improves the convenience of using the device.

[0027] When some of the optical filters 8 on the mounting plate 6 will age or have their optical coatings damaged after long-term use, resulting in performance degradation and requiring replacement, the protective shell 5 only needs to be opened manually, and then the connecting portion 30201 of the curved block 302 is pressed toward the side away from the mounting groove 6001. The spring telescopic rod 301 is squeezed by the curved block 302 and gradually compressed. At this time, the damaged optical filter 8 in the mounting groove 6001 will no longer be restricted by the curved block 302 and can be directly removed from the mounting groove 6001. Then, the edge of the new optical filter 8 is pressed against the inner ring surface of the curved block 302, and the optical filter 8 is inserted into the mounting groove 6001 as a whole. At the same time, the optical filter 8 is pressed against the positioning ring 303 toward the projector 7. 3 controls the distance between each filter 8 and the lens of the projector 7 to prevent the focusing function of the lens of the projector 7 from being affected due to improper distance control, and then slowly loosens the connecting part 30201 to restore the spring telescopic rod 301 to the initial state, and drives the curved block 302 to move to the side close to the mounting groove 6001, so that the filter 8 is smoothly inserted into the mounting groove 6001, thereby realizing the quick replacement of the filter 8 and improving the work efficiency; at the same time, by arranging soft cloth in the inner annular surface of each mounting groove 6001, it is prevented that when the spring telescopic rod 301 drives the curved block 302 to limit and fix the filter 8, the inner annular surface of the mounting groove 6001 and the curved block 302 cause pressure on the edge of the filter 8, thereby avoiding damage to the filter 8.

[0028] Example 2 On the basis of Example 1, Figure 1-Figure 3 , Figure 5 and Figure 7-Figure 9 As shown, it also includes an airbag 401 and a first air pipe 402; the output end of each motor 102 is fixedly connected to the airbag 401; each airbag 401 is made of elastic deformation material; the end of each airbag 401 close to the projector 7 is smaller than the end away from the projector 7; each airbag 401 is connected to two first air pipes 402, and two adjacent first air pipes 402 are rotatably connected to the airbag 401 through a connecting pipe; a one-way valve is fixedly connected in each first air pipe 402.

[0029] The opening of each first air pipe 402 faces a heat-prone part of the projector 7 .

[0030] It also includes a connecting block 501 and a cleaning block 502; a connecting block 501 is slidably connected between each fixed cover 4 and the protective shell 5, and each connecting block 501 is rotatably connected to the adjacent mounting plate 6; a cleaning block 502 is fixedly connected to one side of each connecting block 501 close to the mounting plate 6, and the cleaning block 502 is a microfiber cloth.

[0031] It also includes a water storage box 503; each connecting block 501 is configured as a hollow structure, and a plurality of flow holes are opened on the connecting block 501; a water storage box 503 is fixedly connected to each fixed cover 4; each connecting block 501 is connected to an adjacent water storage box 503, and a solenoid valve is provided at the connecting portion between the connecting block 501 and the adjacent water storage box 503.

[0032] It also includes a second air pipe 601; four connecting holes 6002 are arranged on the mounting plate 6; each air bag 401 is connected with a second air pipe 601, and the second air pipe 601 is rotatably connected to the air bag 401 through a fixing pipe; each second air pipe 601 is arranged with a one-way membrane.

[0033] The working principle of this embodiment is: As the projector 7 is used for a long time, heat will continue to be emitted from its interior, and the continuous rise in temperature will change the color temperature and output power of the light source of the projector 7, thereby affecting the color accuracy of the projected image and causing a reduction in the projection quality.

[0034] To solve the above situation, after the projector 7 has been working for a period of time, the motor 102 is started, and the motor 102 drives the ratchet 201 to rotate clockwise, as viewed from top to bottom. At this time, the ratchet 201 will no longer drive the pawl 202 to rotate together, and because the output end of the motor 102 is rotatably connected to the mounting plate 6, the motor 102 will only drive the airbag 401 to rotate clockwise, and because the end of the airbag 401 close to the projector 7 is smaller than the end away from the projector 7, the rotating airbag 401 will be squeezed by the projector 7, and the volume of the airbag 401 will be reduced, so that the airbag 401 can rotate clockwise. The gas inside 01 is ejected toward the projector 7 through the first air pipe 402, thereby driving the air flow around the projector 7 and improving the heat dissipation effect of the projector 7. When the motor 102 drives the airbag 401 to rotate and gradually reaches the projector 7, the projector 7 will no longer squeeze the airbag 401, and the airbag 401 will gradually recover to its initial state through its elasticity. As the airbag 401 continues to rotate, the projector 7 will intermittently squeeze the airbag 401, so that the first air pipe 402 intermittently cools the projector 7 to prevent high temperature from affecting the projection quality of the projector 7.

[0035] After long-term use of the display stand 1, dust accumulates on the parts inside the display stand 1. Even though the optical filter 8 is shielded and protected by the protective shell 5, some dust still passes through the connection port 5001 of the protective shell 5 and adheres to the optical filter 8, thereby reducing the performance of the optical filter 8.

[0036] To solve the above situation, it is necessary to clean the filter 8 regularly. At this time, start the motor 102 first, and use the motor 102 to drive the ratchet 201 and the mounting plate 6 to rotate counterclockwise based on the view from top to bottom, so that the filter 8 in the mounting groove 6001 is successively close to the cleaning block 502 of the connecting block 501, and the cleaning block 502 is used to wipe the upper and lower surfaces of the filter 8 in the mounting groove 6001, and clean the dust and impurities adhering to the filter 8, thereby preventing the adhered dust from affecting the performance of the filter 8.

[0037] When the impurities on the filter 8 are difficult to remove by wiping the cleaning block 502 alone, the solenoid valve at the connection portion between the connecting block 501 and the adjacent water storage box 503 is started, so that the distilled water in the water storage box 503 flows into the connecting block 501 by gravity, and then flows out to the outside through the flow hole on the connecting block 501, and moistens the cleaning block 502, and then the solenoid valve is closed. It should be noted that the solenoid valve is opened only for a time sufficient to slightly moisten the cleaning block 502, and the distilled water will not drip through the cleaning block 502 to the outside, and the cleaning block 502 is moistened by the distilled water, thereby increasing the cleaning strength of the cleaning block 502 and enhancing the cleaning effect of the cleaning block 502 on the filter 8.

[0038] When the wet cleaning block 502 has finished cleaning the filter 8, it is necessary to wait for the filter 8 to dry before it can be put into use. At this time, the motor 102 is controlled to drive the airbag 401 to rotate clockwise, so that the projector 7 squeezes the airbag 401. After the airbag 401 is squeezed, the gas will be ejected outward through the first air pipe 402 and the second air pipe 601, and the second air pipe 601 will be ejected into the space formed between the protective shell 5 and the mounting plate 6 toward the connecting hole 6002 on the mounting plate 6, thereby driving the airflow between the protective shell 5 and the mounting plate 6 to be discharged outward through the connecting port 5001 of the protective shell 5, thereby increasing the air circulation rate around the filter 8 on the mounting plate 6 and enhancing the air drying effect of the filter 8; when the distilled water in the water storage box 503 is about to be used up, it only needs to be replaced manually on a regular basis.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An interactive holographic evidence display stand for mediation and prosecution, comprising a display stand (1), a glass cover (2) and a fixing ring (3); a plurality of placement cavities (1001) are arranged in the display stand (1); a glass cover (2) is installed on the display stand (1); a fixing ring (3) is arranged in each placement cavity (1001); the characteristics are: The device also comprises a fixed cover (4), a protective shell (5), a mounting plate (6), an optical filter (8) and a driving assembly; each fixed ring (3) is mounted with a fixed cover (4), and the projector (7) and the fixed cover (4) are detachably connected; each fixed cover (4) is provided with a plurality of air holes (4001); each fixed cover (4) is provided with a plurality of optical filters (8); each fixed cover (4) is mounted with a protective shell (5) for protecting the optical filter (8); the protective shell (5) is provided with a plurality of air holes (4001); each fixed cover (4) is provided with a plurality of optical filters (8); each fixed cover (4) is provided with a protective shell (5) for protecting the optical filter (8); A connection port (5001) is provided for facilitating the connection between the lens of the projector (7) and the outside world; a mounting plate (6) is rotatably connected in each fixed cover (4); a plurality of mounting grooves (6001) are provided on each mounting plate (6), and one of the mounting grooves (6001) on the mounting plate (6) has no filter (8) installed in it, while the remaining mounting grooves (6001) are detachably connected to adjacent filters (8); a drive assembly is installed in the display stand (1), and the mounting plate (6) is connected to the drive assembly.

2. The interactive holographic evidence display stand according to claim 1 is characterized in that: The driving assembly comprises a fixed plate (101), a motor (102), a ratchet (201) and a pawl (202); each fixed cover (4) is fixedly connected with a fixed plate (101); each fixed plate (101) is fixedly connected with a motor (102); the output end of each motor (102) is fixedly connected with a ratchet (201), and the output end of each motor (102) is rotatably connected to an adjacent mounting plate (6); each mounting plate (6) is rotatably connected with a plurality of pawls (202) via a torsion spring, and each pawl (202) is meshed with an adjacent ratchet (201).

3. The interactive holographic evidence display stand according to claim 1 is characterized in that: It also includes a spring telescopic rod (301) and a curved block (302); each mounting plate (6) is fixedly connected to a plurality of spring telescopic rods (301); and a curved block (302) for fixing the optical filter (8) is fixedly connected to the telescopic end of each spring telescopic rod (301), and each curved block (302) is located at the edge of an adjacent placement groove (6001); and each curved block (302) is provided with a connecting portion (30201).

4. The interactive holographic evidence display stand according to claim 1 is characterized in that: It also includes a positioning ring (303); a positioning ring (303) is fixedly connected in the placement groove (6001) of each mounting plate (6) to assist in the manual placement of the filter (8).

5. The interactive holographic evidence display stand according to claim 3 is characterized in that: The inner annular surface of each placement groove (6001) on the mounting plate (6) and the curved block (302) are wrapped with soft cloth.

6. The interactive holographic evidence display stand according to claim 2 is characterized in that: It also includes an airbag (401) and a first air tube (402); the output end of each motor (102) is fixedly connected to the airbag (401); each airbag (401) is made of an elastic deformable material; the end of each airbag (401) close to the projector (7) is smaller than the end away from the projector (7); each airbag (401) is connected to a plurality of first air tubes (402), and two adjacent first air tubes (402) are rotatably connected to the airbag (401) via a connecting tube; and each first air tube (402) is fixedly connected to a one-way valve.

7. The interactive holographic evidence display stand according to claim 6 is characterized in that: The opening of each first air pipe (402) faces a heat-prone part of the projector (7).

8. The interactive holographic evidence display stand according to claim 1 is characterized in that: It also includes a connecting block (501) and a cleaning block (502); a connecting block (501) is slidably connected between each fixed cover (4) and the protective shell (5), and each connecting block (501) is rotatably connected to an adjacent mounting plate (6); and a cleaning block (502) is fixedly connected to a side of each connecting block (501) close to the mounting plate (6).

9. The interactive holographic evidence display stand according to claim 8 is characterized in that: It also includes a water storage box (503); each connection block (501) is configured as a hollow structure, and a plurality of flow holes are provided on the connection block (501); each fixed cover (4) is fixedly connected to a water storage box (503) containing distilled water; each connection block (501) is connected to an adjacent water storage box (503), and a solenoid valve is provided at the connection portion between the connection block (501) and the adjacent water storage box (503).

10. The mediation interactive holographic evidence display stand according to claim 6 is characterized in that: It also includes a second air pipe (601); a plurality of connection holes (6002) are provided on the mounting plate (6); each air bag (401) is connected to a second air pipe (601) for drying the optical filter (8), and the second air pipe (601) is rotatably connected to the air bag (401) via a fixing pipe; and a one-way membrane is provided in each second air pipe (601).

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