Holographic projection display device

Abstract

The utility model relates to the technical field of holographic display screens, in particular to a holographic projection display device. Comprising a base, a transmission mechanism, a holographic display screen, a PCBA control card, a rotary shell and a holographic lens assembly. The transmission mechanism is installed on the base, and the output end of the transmission mechanism is connected with the rotating shell to drive the rotating shell to rotate; the holographic display screen and the PCBA control card are mounted in the rotary shell; the holographic lens assembly is mounted on the rotary shell; the PCBA control card is in communication connection with the transmission mechanism and the holographic display screen. The holographic projection display device provided by the utility model not only can realize the rotation of a holographic projection picture, but also can ensure the stability of the rotation, the stability of the whole device, and the projection quality.

Description

Technical Field

[0001] The utility model relates to the technical field of holographic display screens, and more specifically, to a holographic projection display device. Background Art

[0002] In the process of vehicle intelligence, human-computer interaction is an important part. The existing human-computer interaction methods mainly include touch control, human eye recognition, infrared induction, etc. In order to achieve a more vivid and specific human-computer interaction, a vehicle-mounted elf formed by an imaging central control system can realize functions such as air display, voice and gesture interaction, and play a role in driving companionship. The existing vehicle-mounted holographic projection imaging device cannot rotate for display, resulting in poor user experience. Summary of the Utility Model

[0003] In order to overcome the defect that the holographic projection device in the above-mentioned prior art cannot rotate, the utility model provides a holographic projection display device, which realizes the rotation of the air holographic projection and improves the user experience.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A holographic projection display device includes a base, a transmission mechanism, a holographic display screen, a PCBA control card, a rotating housing, and a holographic lens assembly; the transmission mechanism is installed on the base, and the output end of the transmission mechanism is connected to the rotating housing to drive the rotating housing to rotate; the holographic display screen and the PCBA control card are installed in the rotating housing; the holographic lens assembly is installed on the rotating housing; the PCBA control card is respectively communicatively connected to the transmission mechanism and the holographic display screen.

[0006] According to the above technical means, a holographic projection display device provided by the utility model, the PCBA control card controls the holographic display screen to display the picture content, and the picture displayed by the holographic display screen is projected through the holographic lens assembly to form a virtual image in the air at a 1:1 ratio; the PCBA control card, the holographic display screen, and the holographic lens assembly are all installed on the rotating housing; the rotating housing is rotationally connected to the base through the transmission mechanism, and the PCBA control card drives the transmission mechanism to start, thereby driving the rotating housing to rotate. Since the holographic display screen and the holographic lens assembly are both installed on the rotating housing, the rotation of the rotating housing drives the holographic display screen and the holographic lens assembly to rotate together, so that the virtual image projected in the air through the holographic lens assembly also rotates together; the user can adjust the rotation angle according to the usage requirements and habits, so that the projection picture is at the viewing angle required by himself, and 3D stereoscopic display is realized; the utility model enables the entire air holographic projection picture to rotate according to the user's needs by setting the transmission mechanism, ensures the stability of rotation while realizing 3D stereoscopic display, and improves the user experience.

[0007] In one embodiment, the transmission mechanism includes a transmission motor, a transmission gear set, a mounting plate, and a rotating bracket; the transmission motor is mounted on the mounting plate, the transmission gear set is rotatably mounted on the mounting plate, the input end of the transmission gear set is connected to the output end of the transmission motor, the output end of the transmission gear set is connected to the rotating bracket, and the rotating bracket is connected to the rotating housing; the mounting plate is fixed to the base; the PCBA control card is communicatively connected to the transmission motor. The transmission mechanism is used for the picture of the holographic display to be rotatable 3D displayed in the air. Its working process is that the PCBA control card drives the transmission motor to work, the transmission motor rotates the transmission gear set, the rotation of the transmission gear set drives the connected rotating bracket to rotate, the rotation of the rotating bracket drives the connected rotating housing to rotate, and the rotation of the rotating housing drives the connected holographic display to rotate, so as to realize the rotation of the aerial imaging of the holographic projection of the holographic display.

[0008] In one embodiment, the transmission gear set includes a worm, a first gear, and a second gear; the rotating shaft of the worm is connected to the output shaft of the transmission motor, the worm meshes with the first gear; the first gear meshes with the second gear; the rotating shafts of the first gear and the second gear are both rotatably mounted on the mounting plate; the rotating bracket is connected to the rotating shaft of the second gear. The rotating shaft of the worm is fixedly connected to the output shaft of the transmission motor, and the worm meshes with the first gear, which is equivalent to the transmission of a worm and a worm wheel; the first gear then meshes with the second gear, and both the first gear and the second gear are mounted on the mounting plate, and the rotating bracket is connected to the second gear. The rotation of the worm drives the rotation of the second gear, thereby driving the rotation of the rotating bracket and finally driving the rotation of the rotating housing. Preferably, the first gear includes two sets of large gears and small gears arranged coaxially; the large gear meshes with the worm, and the small gear meshes with the second gear; the diameter of the second gear is larger than that of the first gear. Through the above settings, the effects of deceleration and improved transmission stability can be achieved.

[0009] In one embodiment, the rotating bracket is provided with a rotating shaft. One end of the rotating shaft sequentially passes through the second gear and the mounting plate and abuts against the base. The rotating shaft passes through the second gear and is fixedly connected to the second gear; the rotating shaft passes through the mounting plate and is rotatably connected to the mounting plate; the other end of the rotating shaft is fixedly connected to the rotating housing. One end of the rotating shaft abuts against the base and is rotatably connected to the base, and the other end is connected to the rotating housing, which not only ensures the normal rotation of the rotating bracket but also further improves the rotation stability and avoids shaking during the rotation process.

[0010] In one embodiment, a limiting through hole is provided on the mounting plate, and the rotating shaft rotatably passes through the limiting through hole. A circlip for restricting the axial movement of the rotating shaft is further provided at the limiting hole, and the circlip is sleeved on the rotating shaft. The rotating shaft passes through the limiting through hole and can rotate in the limiting through hole. By sleeving the circlip, the rotating shaft can be limited. While ensuring that the rotating shaft can rotate, the axial movement of the rotating shaft is restricted, further improving the stability of rotation.

[0011] In one embodiment, the transmission mechanism further includes a damper, which is connected to the rotating shaft and is located between the mounting plate and the second gear. The damper is used to apply a damping force to the rotating bracket to reduce the vibration amplitude caused by rotation, so that the holographic display screen, the holographic lens assembly, etc. are protected from damage caused by vibration, and the stability and safety of the entire device are improved.

[0012] In one embodiment, a sliding gasket for reducing friction is installed on the base, and the rotating housing is indirectly in contact with the base through the sliding gasket. Preferably, the sliding gasket is provided at a position relative to the outer edge of the rotating housing. The rotating housing is connected to the base through the sliding gasket. On the one hand, the outer periphery of the rotating housing will not be suspended, avoiding shaking during rotation. On the other hand, the surface friction of the sliding disc is small. When the rotating housing contacts the sliding disc, the rotation resistance will not be increased. It can ensure the stability of rotation without increasing the rotation resistance.

[0013] In one embodiment, the holographic lens assembly includes a glass cover plate and a holographic lens; the holographic lens is limitedly installed on the rotating housing, and the glass cover plate is attached to one side of the holographic lens. The picture of the holographic display screen is projected through the holographic lens, and the glass cover plate is used to protect the holographic lens to avoid scratches, abrasions, etc. of the holographic lens during use, which may affect the projection effect.

[0014] In one embodiment, a display bracket is further included, and the display bracket is installed in the rotating housing; the holographic display screen and the PCBA control card are both installed on the display bracket. The holographic display screen and the PCBA control card are installed on the display bracket to form an integrated display and control unit.

[0015] In one embodiment, an infrared sensor is provided on the PCBA control card and assembled by a chip mounting process. The infrared sensor is communicatively connected to the PCBA control card. The infrared sensor is used for human-computer interaction functions such as gesture sensing, body sensing, and remote control sensing.

[0016] Compared with the prior art, the beneficial effects are as follows: A holographic projection display device provided by the present utility model can not only realize the rotation of the holographic projection picture, but also ensure the stability of the rotation, thus ensuring the stability of the entire device and the projection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0018] Figure 2 It is an exploded schematic diagram of the structure of the present utility model.

[0019] Figure 3 It is a schematic diagram of the overall external shape of the present utility model.

[0020] Figure 4 It is a schematic diagram of the installation of the transmission mechanism of the present utility model.

[0021] Figure 5 It is a schematic diagram of the structure of the transmission mechanism of the present utility model.

[0022] Figure 6 It is a schematic diagram of the structure of the mounting plate of the present utility model.

[0023] Figure 7 It is a schematic diagram of the principle of holographic projection imaging.

[0024] Figure 8 It is a schematic diagram of the control system structure of Embodiment 3.

[0025] Reference numerals: 1, base; 11, sliding gasket; 2, transmission mechanism; 21, transmission motor; 22, mounting plate; 221, limiting through hole; 222, circlip; 23, rotating bracket; 231, rotating shaft; 24, worm; 25, first gear; 26, second gear; 27, damper; 3, holographic display screen; 4, PCBA control card; 5, rotating housing; 51, square limiting hole; 6, holographic lens assembly; 61, glass cover plate; 62, holographic lens; 63, OCA optical adhesive; 7, display bracket; 8, aerial imaging. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The present utility model will be described in one of the specific embodiments below. Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0027] In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time.

[0028] Embodiment 1:

[0029] As Figures 1 to 6 shown, a holographic projection display device includes a base 1, a transmission mechanism 2, a holographic display screen 3, a PCBA control card 4, a rotating housing 5, and a holographic lens assembly 6; the transmission mechanism 2 is installed on the base 1, the output end of the transmission mechanism 2 is connected to the rotating housing 5 to drive the rotating housing 5 to rotate; the holographic display screen 3 and the PCBA control card 4 are installed in the rotating housing 5; the holographic lens assembly 6 is installed on the rotating housing 5; the PCBA control card 4 is respectively communicatively connected to the transmission mechanism 2 and the holographic display screen 3.

[0030] A holographic projection display device provided by the present utility model, wherein a PCBA control card 4 controls a holographic display screen 3 to display picture content, and the picture displayed by the holographic display screen 3 is projected through a holographic lens assembly 6 to form a virtual image in the air at a 1:1 ratio; the PCBA control card 4, the holographic display screen 3, and the holographic lens assembly 6 are all installed in a rotating housing 5; the rotating housing 5 is rotationally connected to a base 1 through a transmission mechanism 2, and the PCBA control card 4 controls the transmission mechanism 2 to start, thereby driving the rotating housing 5 to rotate. Since the holographic display screen 3 and the holographic lens assembly 6 are both installed in the rotating housing 5, the rotation of the rotating housing 5 drives the holographic display screen 3 and the holographic lens 62 to rotate together, so that the virtual image projected in the air through the holographic lens assembly 6 also rotates together; the user can adjust the rotation angle according to usage requirements and habits, so that the projected picture is at the viewing angle required by the user and realizes 3D stereoscopic display; by setting the transmission mechanism 2, the present utility model enables the entire holographic projection picture in the air to rotate according to user requirements, ensures the stability of rotation while realizing 3D stereoscopic display, and improves the user experience.

[0031] As Figure 2 , Figures 4 to 6 shown, the transmission mechanism 2 includes a transmission motor 21, a transmission gear set, a mounting plate 22, and a rotating bracket 23; the transmission motor 21 is installed on the mounting plate 22, the transmission gear set is rotatably installed on the mounting plate 22, the input end of the transmission gear set is connected to the output end of the transmission motor 21, the output end of the transmission gear set is connected to the rotating bracket 23, and the rotating bracket 23 is connected to the rotating housing 5; the mounting plate 22 is fixed to the base 1; the PCBA control card 4 is communicatively connected to the transmission motor 21. Among them, the transmission gear set includes a worm 24, a first gear 25, and a second gear 26; the rotating shaft of the worm 24 is connected to the output shaft of the transmission motor 21, and the worm 24 meshes with the first gear 25; the first gear 25 meshes with the second gear 26; the rotating shafts of the first gear 25 and the second gear 26 are both rotatably installed on the mounting plate 22; the rotating bracket 23 is connected to the rotating shaft of the second gear 26. The rotating shaft of the worm 24 is fixedly connected to the output shaft of the transmission motor 21, the worm 24 meshes with the first gear 25, the transmission motor 21 drives the rotation of the worm 24 to drive the rotation of the first gear 25, the rotation of the first gear 25 drives the rotation of the second gear 26, thereby driving the rotating bracket 23 to drive, and finally driving the rotating housing 5 to rotate.

[0032] The transmission mechanism 2 is used for the holographic display screen 3 to perform a rotatable 3D display of the aerial imaging 8. Its working process is that the PCBA control card 4 drives the transmission motor 21 to work. The transmission motor 21 rotates the worm 24, the worm 24 drives the first gear 25 to rotate, the first gear 25 drives the second gear 26 to rotate, the second gear 26 drives the rotating bracket 23 to rotate, and the rotation of the rotating bracket 23 drives the connected rotating housing 5 to rotate. The rotation of the rotating housing 5 drives the connected holographic display screen 3 to rotate, so as to realize the rotation of the aerial imaging 8 of the holographic projection of the holographic display screen 3. Through gear transmission, the transmission is more stable. Preferably, the first gear 25 includes two groups of large gears and small gears arranged coaxially; the large gear meshes with the worm 24, and the small gear meshes with the second gear 26; the diameter of the second gear 26 is larger than that of the first gear 25. Through the above settings, the effects of deceleration and improved transmission stability can be achieved.

[0033] As Figure 4 and Figure 6 shown, the rotating bracket 23 is provided with a rotating shaft 231. One end of the rotating shaft 231 sequentially passes through the second gear 26 and the mounting plate 22 and abuts against the base 1. The rotating shaft 231 passes through the second gear 26 and is fixedly connected to the second gear 26; the rotating shaft 231 passes through the mounting plate 22 and is rotatably connected to the mounting plate 22; the other end of the rotating shaft 231 is fixedly connected to the rotating housing 5. One end of the rotating shaft 231 abuts against the base 1 and is rotatably connected to the base 1, and the other end is connected to the rotating housing 5, which not only ensures the normal rotation of the rotating bracket 23 but also further improves the stability of rotation and avoids shaking during the rotation process.

[0034] As Figure 2 , Figure 4 , and Figure 5 shown, a square limiting hole 51 is provided at the bottom of the rotating housing 5. The rotating bracket 23 includes a square bracket and a rotating shaft 231. The square bracket is fixedly sleeved on the rotating shaft 231. The square bracket is connected to the square limiting hole 51 and is fixedly connected to the rotating housing 5; through the connection method of the square limiting hole 51, a limiting effect can be achieved to a certain extent, preventing the rotating bracket 23 from rotating relative to the rotating housing 5 during the rotation process and improving the connection stability between the rotating bracket 23 and the rotating housing 5.

[0035] As Figure 6As shown in the figure, a limiting through-hole 221 is provided on the mounting plate 22. The rotating shaft 231 is rotatably inserted through the limiting through-hole 221. A circlip 222 for restricting the axial movement of the rotating shaft 231 is also provided at the limiting hole. The circlip 222 is sleeved on the rotating shaft 231. The rotating shaft 231 passes through the limiting through-hole 221 and can rotate in the limiting through-hole 221. By sleeving the circlip 222, the rotating shaft 231 can be limited. While ensuring that the rotating shaft 231 can rotate, the axial movement of the rotating shaft 231 is restricted, further improving the stability of rotation.

[0036] In this embodiment, a groove recessed toward the base 1 is also provided on the mounting plate 22. The drive motor 21 is installed in the groove. The mounting plate 22 is also provided with mounting holes for mounting the first gear 25 and the second gear 26. The rotating shafts of the first gear 25 and the second gear 26 are inserted through the mounting holes and are supported and positioned by the limiting platforms on the rotating shafts. The mounting plate 22 is fixedly connected to the base 1 by screws.

[0037] As Figure 2 and Figure 4 shown, the transmission mechanism 2 further includes a damper 27. The damper 27 is connected to the rotating shaft 231 and is located between the mounting plate 22 and the second gear 26. The damper 27 is used to apply a damping force to the rotating bracket 23 to reduce the vibration amplitude caused by rotation, so that the holographic display screen 3, the holographic lens assembly 6, etc. are protected from damage caused by vibration, improving the stability and safety of the entire device.

[0038] As Figure 3 and Figure 4 shown, a sliding gasket 11 for reducing friction is installed on the base 1. The rotating housing 5 is indirectly in contact with the base 1 through the sliding gasket 11. Preferably, the sliding gasket 11 is arranged at a position relative to the outer edge of the rotating housing 5. The rotating housing 5 is connected to the base 1 through the sliding gasket 11. On the one hand, the outer circumference of the rotating housing 5 will not be completely suspended, avoiding shaking during rotation. On the other hand, the surface friction of the sliding disc is small. When the rotating housing 5 contacts the sliding disc, the rotation resistance will not be increased. It can ensure the stability of rotation without increasing the rotation resistance.

[0039] As Figures 1 to 4As shown in the figure, in this embodiment, the base 1 is a circular base 1, and the rotating housing 5 is also a cylindrical hollow housing. One end of the rotating housing 5 is connected to the base 1 through a transmission mechanism 2, and the other end is installed with a holographic lens assembly 6. The holographic projection is imaged directly above the device, that is, at the end where the holographic lens assembly 6 is installed. The transmission mechanism 2 is located inside the base 1, and the holographic display screen 3 and the PCBA control card 4 are installed inside the rotating housing 5 through a display bracket 7; the display bracket 7 is fixedly installed inside the rotating housing 5; both the holographic display screen 3 and the PCBA control card 4 are installed on the display bracket 7. The holographic display screen 3 is adhered to the alloy display bracket 7 by structural adhesive, and the PCBA control card 4 is connected to the display bracket 7 by screws. The holographic display screen 3, the PCBA control card 4, and the display bracket 7 form a display and control unit, with a compact structure and a stable transmission method.

[0040] As Figure 2 shown, the holographic lens assembly 6 includes a glass cover plate 61 and a holographic lens 62; the holographic lens 62 is installed on the rotating housing 5, and the glass cover plate 61 is attached to one side of the holographic lens 62. The image of the holographic display screen 3 is projected through the holographic lens 62, and the glass cover plate 61 is used to protect the holographic lens 62 to prevent scratching of the holographic lens 62 during use, etc., which may affect the projection effect. The glass cover plate 61 is attached to the surface of the holographic lens 62 through an OCA optical adhesive 63, and the holographic lens 62 is connected and fixed to the rotating housing 5 through a limiting hole and structural adhesive.

[0041] As Figure 1 and Figure 7 shown, the image displayed on the holographic display screen 3 is projected through the holographic lens 62 to form a virtual image in the air at a 1:1 ratio, and the imaging direction is perpendicular to the original image of the holographic display screen 3. The holographic lens 62 is composed of a neatly arranged structure of vertically intersecting mirrors. After the light emitted by the image and the object passes through the special structure glass with negative refraction and light diffusion characteristics, it converges again at the same distance on the opposite side, forming an image identical to the original object, and the direction is 90° perpendicular to the original display image. Inside the holographic lens 62, there are two vertically intersecting plane mirrors. The first incident angle and the first exit angle are respectively the same as their reflection angles, and finally, it is displayed in a 1:1 space with the holographic lens 62 as the reference axis to form a virtual image in the air.

[0042] As Figure 7 shown, the principle of the aerial imaging 8 of the holographic display screen 3 is that the image and picture displayed on the holographic display screen 3 form an aggregate of diffused light. The light diffused from each point is reflected in the respective directions specified by the holographic lens 62. Using the special reflection of the holographic lens 62, the diffused light is focused in the direction where the light is reflected. The light gathered at the point starts to diffuse again to form an aerial projection image, and the imaging direction is perpendicular to the original image of the display screen at an angle of 90°.

[0043] Example 2:

[0044] In this embodiment, other structures are the same as those in Embodiment 1. The difference is that in this embodiment, an infrared sensor is provided on the PCBA control card 4 and assembled by the chip mounting process. The infrared sensor is communicatively connected to the PCBA control card 4. The infrared sensor is provided on the PCBA control card 4 and communicatively connected to the holographic display screen 3, and is used for human-computer interaction functions such as gesture sensing, body sensing, and remote control sensing.

[0045] Example 3:

[0046] As Figure 8As shown, this embodiment provides a control system based on a holographic display device. As shown in the figure, it includes the holographic display device of Embodiment 1 or Embodiment 2. Among them, the PCBA control card 4 is the core part for controlling and managing the holographic display screen 3, responsible for controlling the holographic display screen 3 and the transmission mechanism 2. An MCU (Micro Control Unit) chip, a deserialization chip, an HSD (High-Speed Data Transmission) connector, a backlight drive chip, a touch chip, an infrared sensor, and a PMIC chip are provided on the PCBA control card 4. The specific control method is as follows: The MCU chip is connected to the deserialization chip through the I2C bus. The deserialization chip is connected to the HSD connector through the LVDS interface. The HSD connector is used for the connection and data communication between the intelligent cockpit domain controller and the PCBA control card 4. The SOC (System-on-Chip) chip in the intelligent cockpit domain controller transmits the calculated and processed video and image data to the deserialization chip through the GMSL high-speed data transmission protocol and the HSD connector. The deserialization chip converts the received serial data into parallel data, and then transmits it to the holographic display screen 3 through the eDP interface, the MAIN_I2C (Master I2C Communication Protocol), and the TP_I2C (Touch) communication protocol and via the FPC (Flexible Printed Circuit) connector for video and image display. The MCU chip is connected to the backlight drive chip through PWM (Pulse Width Modulation) to keep the output voltage constant when the working conditions change. The backlight drive chip is used to drive and control the backlight module in the holographic display screen 3. The touch signal is transmitted to the deserialization chip through the holographic display screen 3 and the FPC connector through the TP_I2C and TP_INT communication protocols, and then transmitted to the SOC chip for calculation and processing. The MCU chip is connected to the touch chip through the TP_I2C communication protocol. The touch chip is used to detect the XY coordinate signals generated by the touch, the touch interruption, and the reset function. The MCU chip is communicatively connected to the PMIC chip (Power Management Chip) for the power connection and management of the holographic display screen 3. The MCU chip is connected to the motor drive chip in the drive motor 21 through the MCU_INT / RST communication protocol, the SPI interface, and PWM. The motor drive chip is used to drive the rotation of the transmission gear to realize the control and management of the rotation function of the holographic display screen 3. The MCU chip is also connected to the infrared sensor through the I2C bus protocol for human-computer interaction functions such as gesture sensing, body sensing, and remote control sensing of the display screen. The MCU chip receives the display signal, the touch signal, the rotation instruction, and the infrared sensing signal transmitted from the SOC chip, the deserialization chip, the touch chip, the motor drive chip, and the infrared sensor, and generates a control instruction based on this information to control the holographic display screen 3.

[0047] The PCBA control card 4 is connected to the intelligent cockpit domain controller through an HSD connector to achieve data communication with the intelligent cockpit domain controller containing the SOC chip. The intelligent cockpit domain controller is connected to multiple peripheral hardware, including a network component connected through an RGMII network communication interface and a 1000Base-T1 (in-vehicle gigabit Ethernet) protocol, an audio component connected through an I2S audio bus protocol and a TDM (time-division multiplexing) protocol, a camera component connected through an MIPI_CSI interface (Mobile Industry Processor Interface Camera Serial Interface) and a GMSL protocol, and a center control display screen and an HUD head-up display screen connected through an MIPI_DSI interface (Mobile Industry Processor Interface Display Serial Interface) and a GMSL protocol. The PCBA control card 4 is connected to the liquid crystal display through an FPC connector to achieve the transmission of display signals, touch signals, backlight signals, and infrared sensing signals between the PCBA control card 4 and the liquid crystal display.

[0048] The SOC chip is a system-on-chip used for data calculation and processing. The MCU chip is a microcontroller unit used for issuing and executing various control instructions. The eDP interface is an internal digital interface based on the DisplayPort architecture and protocol, which can replace the LVDS interface and is used for display panels with a resolution ≥ full high-definition resolution (1920×1080). The MAIN_I2C communication protocol is the master I2C communication protocol. The I2C (Inter-Integrated Circuit) bus is a commonly used serial communication bus that uses a serial data line (SDA) and a serial clock line (SCL) for two-way transmission. The serial data line SDA is used to transmit data, and the serial clock line SCL is used to control the timing of data reception and transmission. LVDS represents low-voltage differential signals, which can transmit serial data at speeds of up to several thousand Mbps and has the transmission characteristics of high speed, low power consumption, and anti-interference. GMSL represents gigabit multimedia serial link, a high-speed serial interface suitable for the transmission of audio, video, and control signals, which can support high-definition video and high-speed Ethernet data transmission and support multi-channel display screen and camera data transmission. The TP_INT signal line transmits touch interrupt signals, and the touch chip tells the external controller about new touch events through the TP_INT signal line. The MCU_INT / RST communication protocol is used for the interruption and reset of signal transmission by the MCU chip. The SPI interface is a synchronous serial peripheral interface that enables the MCU chip to communicate with various peripheral devices in a serial manner to exchange information.

[0049] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] Obviously, the above embodiments of the present utility model are merely examples given for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A holographic projection display device, characterized in that: The invention comprises a base (1), a transmission mechanism (2), a holographic display screen (3), a PCBA control card (4), a rotating shell (5), and a holographic lens assembly (6); the transmission mechanism (2) is mounted on the base (1); an output end of the transmission mechanism (2) is connected to the rotating shell (5) to drive the rotating shell (5) to rotate; the holographic display screen (3) and the PCBA control card (4) are mounted in the rotating shell (5); the holographic lens assembly (6) is mounted on the rotating shell (5); and the PCBA control card (4) is respectively connected to the transmission mechanism (2) and the holographic display screen (3) for communication.

2. The holographic projection display device according to claim 1, characterized in that: The transmission mechanism (2) comprises a transmission motor (21), a transmission gear set, a mounting plate (22) and a rotating bracket (23); the transmission motor (21) is mounted on the mounting plate (22), the transmission gear set is rotatably mounted on the mounting plate (22), the input end of the transmission gear set is connected to the output end of the transmission motor (21), the output end of the transmission gear set is connected to the rotating bracket (23), and the rotating bracket (23) is connected to the rotating housing (5); the mounting plate (22) is fixed to the base (1); and the PCBA control card (4) is communicatively connected to the transmission motor (21).

3. The holographic projection display device according to claim 2, characterized in that: The transmission gear set comprises a worm (24), a first gear (25), and a second gear (26); the rotating shaft of the worm (24) is connected to the output shaft of the transmission motor (21), and the worm (24) is meshed with the first gear (25); the first gear (25) is meshed with the second gear (26); the rotating shafts of the first gear (25) and the second gear (26) are both rotatably mounted on the mounting plate (22); and the rotating bracket (23) is connected to the rotating shaft of the second gear (26).

4. The holographic projection display device according to claim 3, characterized in that: The rotating bracket (23) is provided with a rotating shaft (231); one end of the rotating shaft (231) passes through the second gear (26) and the mounting plate (22) in sequence and then abuts against the base (1); the rotating shaft (231) passes through the second gear (26) and is fixedly connected to the second gear (26); the rotating shaft (231) passes through the mounting plate (22) and is rotatably connected to the mounting plate (22); and the other end of the rotating shaft (231) is fixedly connected to the rotating housing (5).

5. The holographic projection display device according to claim 4, characterized in that: The mounting plate (22) is provided with a limiting through hole (221), the rotating shaft (231) is rotatably arranged in the limiting through hole (221), and a retaining spring (222) for limiting the axial movement of the rotating shaft (231) is also provided at the limiting through hole, and the retaining spring (222) is sleeved on the rotating shaft (231).

6. The holographic projection display device according to claim 4, characterized in that: The transmission mechanism (2) further comprises a damper (27), wherein the damper (27) is connected to the rotating shaft (231) and is located between the mounting plate (22) and the second gear (26).

7. The holographic projection display device according to claim 3, characterized in that: A sliding washer (11) for reducing friction is installed on the base (1), and the rotating housing (5) is in indirect contact with the base (1) via the sliding washer (11).

8. The holographic projection display device according to any one of claims 1 to 6, characterized in that: The holographic lens assembly (6) comprises a glass cover plate (61) and a holographic lens (62); the holographic lens (62) is mounted on the rotating housing (5), and the glass cover plate (61) is attached to one side of the holographic lens (62).

9. The holographic projection display device according to claim 7, characterized in that: It also comprises a display bracket (7), wherein the display bracket (7) is installed in the rotating shell (5); the holographic display screen (3) and the PCBA control card (4) are both installed on the display bracket (7).

10. The holographic projection display device according to claim 7, characterized in that: The PCBA control card (4) is provided with an infrared sensor, and the infrared sensor is communicatively connected to the PCBA control card (4).

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