Dual imaging vehicle display device and control method

Abstract

The application discloses a kind of dual imaging vehicle display device and control method, belong to vehicle display field, light sensor is installed to front windshield to detect the light intensity of ambient light, controller judges current required imaging mode according to light intensity data;When holographic film imaging is required, winding drive member drives reel rotation, holographic film extends and expands to adhere to front windshield, deflection drive member drives micromirror array deflection, light emitted by image source is guided to holographic film to realize imaging through micromirror array;When free curved mirror imaging is required, winding drive member drives reel reverse, holographic film is wound on reel, deflection drive member drives micromirror array reverse deflection, light emitted by image source is reflected to free curved mirror through micromirror array, and free curved mirror transmits light to front windshield and images, when holographic film imaging, projection area is greatly expanded to more than 20 inches, field of view FOV is improved to more than 15 °*5 °, and virtual image distance is more than 20m.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted displays, and in particular to a dual-imaging vehicle-mounted display device and its control method. Background Technology

[0002] Head-up display (HUD) technology uses reflective optical design to project light emitted from an image source onto an imaging window (image panel, windshield, etc.). This allows the driver to see information such as speed and navigation directly without looking down while observing the real environment outside the windshield. This avoids the distraction caused by looking down at the instrument panel or central control screen while driving, thereby improving driving safety and providing a better driving experience.

[0003] Existing head-up displays use freeform mirrors or holographic films. Freeform mirrors have excellent heat resistance and are not easily deformed in high-temperature environments, but their image quality is poor when the ambient light intensity is low. Although holographic films can achieve better image quality and a wider viewing angle in low-light conditions, increasing driving safety and experience, their thermal stability is poor. They are easily damaged by exposure to sunlight when the ambient light intensity is high, resulting in a short service life. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this invention is to provide a dual-imaging vehicle display device that can switch between a holographic film and a freeform mirror according to the intensity of ambient light. When the intensity of ambient light is weak, holographic film imaging is used, resulting in good imaging quality and a wide viewing angle; when the intensity of ambient light is strong, freeform mirror imaging is used, and the holographic film is rolled up and stored, extending the service life of the holographic film.

[0005] To overcome the shortcomings of the prior art, the second objective of this invention is to provide a dual-imaging vehicle display device control method that can switch between the holographic film and the freeform mirror according to the ambient light intensity. When the ambient light intensity is weak, the holographic film is used for imaging, resulting in good imaging quality and a wide viewing angle; when the ambient light intensity is strong, the freeform mirror is used for imaging, and the holographic film is rolled up and stored, extending the service life of the holographic film.

[0006] One of the objectives of this invention is achieved through the following technical solution:

[0007] A dual-imaging vehicle-mounted display device includes a holographic film, a freeform mirror, and an image source. The dual-imaging vehicle-mounted display device also includes a light sensor, a roll-up structure, a switching structure, and a controller.

[0008] The light sensor is installed on the windshield to detect the intensity of ambient light. The light sensor is communicatively connected to the controller to transmit the light intensity data to the controller in real time. The controller determines the current required imaging mode based on the light intensity data.

[0009] The curled structure includes a roller and a winding drive connected to the roller in a driving connection. The holographic film is mounted on the roller, and the winding drive is communicatively connected to the controller.

[0010] The switching structure includes a micromirror array and a deflection drive for driving the micromirror array to deflect, the deflection drive being communicatively connected to the controller;

[0011] When holographic film imaging is required, the winding drive drives the spool to rotate, the holographic film extends and unfolds to adhere to the windshield, and the deflection drive drives the micromirror array to deflect. The light emitted from the image source is guided to the holographic film through the micromirror array to achieve imaging. When freeform mirror imaging is required, the winding drive drives the spool to reverse, the holographic film is wound onto the spool, and the deflection drive drives the micromirror array to deflect in the opposite direction. The light emitted from the image source is reflected by the micromirror array to the freeform mirror, and the freeform mirror transmits the light to the windshield for imaging.

[0012] Furthermore, the dual-imaging vehicle display device also includes a battery, the image source includes a light source, the battery is electrically connected to the light source, the battery supplies power to the light source, the battery is communicatively connected to the controller, and the controller controls the current supplied by the power source to the light source according to the light intensity data to adjust the intensity of the light source, so that the intensity of the light source is adjusted according to the light intensity of the ambient light.

[0013] Furthermore, the battery is a solar cell, and the light source is an LED lamp.

[0014] Furthermore, the solar cell is a perovskite cell, which is integrated into the front end of the HUD or the glass interlayer of the roof.

[0015] Furthermore, when the perovskite cell is integrated into the HUD front end, the perovskite cell and the LED light share the same substrate material, forming a closed-loop system.

[0016] Furthermore, the dual-imaging vehicle display device also includes a film guiding structure, which includes a first adsorption member, a second adsorption member, and a translation member. The first adsorption member is fixed to the edge of the holographic film, the translation member is fixed to the frame of the windshield, and the second adsorption member is fixed to the output end of the translation member. The first adsorption member and the second adsorption member are adsorbed together. The translation member drives the second adsorption member to move along the length or width direction of the windshield to guide the holographic film to unfold, so that the holographic film is attached to the windshield after unfolding.

[0017] Furthermore, the scroll is located at the top of the windshield, and the translation component is located at the A-pillar.

[0018] Furthermore, the dual-imaging vehicle display device also includes a film guiding structure, which includes a traction shaft, a traction line, and a traction groove disposed on the windshield. The traction shaft is disposed opposite to the reel and is located on both sides of the windshield. The two ends of the traction line are fixed to the holographic film and the traction shaft, respectively. The holographic film is at least partially located in the traction groove. When the traction shaft rotates, the holographic film moves along the traction groove under the traction of the traction line.

[0019] The second objective of this invention is achieved by the following technical solution:

[0020] A control method for a dual-imaging vehicle-mounted display device based on any of the above-mentioned dual-imaging vehicle-mounted display devices includes the following steps:

[0021] Determine the imaging mode: The light sensor detects the intensity of ambient light and determines the required imaging mode based on the intensity of ambient light;

[0022] Holographic film imaging: When the required imaging model is holographic film imaging, the roller rotates to extend the holographic film, the film guiding structure guides the holographic film to unfold and attach it to the windshield, the micromirror array deflects, and the light emitted from the image source is guided to the holographic film through the micromirror array to achieve imaging.

[0023] Freeform mirror imaging: When the required imaging mode is freeform mirror imaging, the scroll is reversed, the holographic film is wound up on the scroll, the micromirror array is deflected in the opposite direction, the light emitted by the image source is reflected by the micromirror array to the freeform mirror, and the freeform mirror transmits the light to the windshield for imaging.

[0024] Furthermore, the control method for the dual-imaging vehicle display device also includes a light source adjustment step, which specifically involves the power supply controlling the current supplied to the light source according to the light intensity data to adjust the intensity of the light source, so that the intensity of the light source is adjusted according to the intensity of the ambient light.

[0025] Furthermore, the power supply controls the magnitude of the current supplied to the light source based on the light intensity data by establishing a piecewise linear interpolation function to map the ambient light intensity to the LED driving current.

[0026] Furthermore, in the step of determining the imaging mode, determining the current required imaging mode based on the ambient light intensity also includes: the controller is connected to the vehicle navigation system and the weather forecast system, the vehicle navigation system provides the real-time location of the vehicle, and the weather forecast system provides the real-time weather status. When the ambient light intensity detected by the light sensor is less than a threshold, the real-time location information of the vehicle and the real-time weather status information are extracted to avoid false triggering caused by the vehicle entering tunnels or shaded areas.

[0027] Compared to existing technologies, the dual-imaging vehicle display device of this invention further includes a light sensor, a roll-up structure, a switching structure, and a controller. The light sensor is installed on the windshield to detect the intensity of ambient light. The light sensor is communicatively connected to the controller, transmitting light intensity data to the controller in real time. The controller determines the desired imaging mode based on the light intensity data. The holographic film is installed on a roll, and the winding drive is communicatively connected to the controller. The deflection drive of the switching structure is also communicatively connected to the controller. When holographic film imaging is required, the winding drive drives the roll to rotate, extending and unfolding the holographic film to adhere to the windshield. The deflection drive drives the micromirror array to deflect, and the light emitted from the image source is guided to the holographic film through the micromirror array to achieve imaging. When freeform mirror imaging is required, the winding drive drives the roll to reverse, and the holographic film... The holographic film is rolled up on a spool, and a deflection drive drives the micromirror array to deflect in the opposite direction. The light emitted from the image source is reflected by the micromirror array to the freeform mirror, which then transmits the light to the windshield for imaging. Through this design, the dual-imaging vehicle display device can switch between the holographic film and the freeform mirror according to the ambient light intensity. When the ambient light intensity is low, holographic film imaging is used, resulting in good image quality and a wide viewing angle. When the ambient light intensity is high, freeform mirror imaging is used, and the holographic film is rolled up and stored, extending its lifespan. When the holographic film is used for imaging, the projection area is significantly expanded to over 20 inches, the field of view (FOV) is increased to over 15°*5°, and the virtual image distance is greater than 20m, solving the problems of limited display area and insufficient information interaction in vehicle displays. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the dual-imaging vehicle-mounted display device of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the first embodiment of the dual-imaging vehicle-mounted display device;

[0030] Figure 3 for Figure 1A schematic diagram of a second embodiment of a dual-imaging vehicle-mounted display device;

[0031] Figure 4 for Figure 1 Optical path diagram of the holographic film imaging mode of the dual-imaging vehicle-mounted display device;

[0032] Figure 5 for Figure 1 Optical path diagram of the freeform mirror imaging mode of the dual-imaging vehicle-mounted display device;

[0033] Figure 6 This is a flowchart of the control method for the dual-imaging vehicle-mounted display device of the present invention.

[0034] In the diagram: 10. Windshield; 20. Holographic film; 30. Rolled structure; 31. Roller; 32. Rewinding drive; 40. Freeform mirror; 50. Switching structure; 51. Deflection drive; 52. Micromirror array; 60. Image source; 70. Driver; 80. Film guiding structure; 81. Translation component; 82. Second adsorption component; 83. First adsorption component; 84. Traction shaft; 85. Traction line; 90. Light sensor. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Please see Figure 1 The present invention discloses a dual-imaging vehicle display device, which is used to project the light emitted by the image source 60 onto the windshield 10, so that the driver 70 can directly see information such as speed and navigation without looking down while observing the real environment outside the windshield 10.

[0038] The dual-imaging vehicle display device includes a holographic film 20, a rollable structure 30, a freeform mirror 40, a switching structure 50, an image source 60, a film guiding structure 80, and a light sensor 90.

[0039] The holographic film 20 is applied to the inside of the windshield 10 during use and is not suitable for being rolled up on the reel 31 to prevent it from being exposed to sunlight and affecting its service life. The holographic film 20 includes a functional layer and two substrate layers located on either side of the functional layer. The functional layer is made of a photopolymer through exposure. The raw material components of the photopolymer, by weight, are: 100 parts flexible acrylate resin; 0.01-0.1 parts curing agent; 20-70 parts functional monomer; 2-5 parts photoinitiator; 0.05-5 parts photosensitive dye; and 10-60 parts first solvent, wherein the functional monomer is a mixture of polyfunctional and monofunctional monomers. The polyfunctional monomer is selected from at least one of ethoxylated bisphenol fluorene diacrylate, bisphenol A-dimethacrylate, pentaerythritol tetraacrylate, and ethoxylated trimethylolpropane triacrylate. The holographic film 20 has strong roll-up properties and can withstand 100,000 bends without affecting its optical performance and structural integrity.

[0040] Please continue reading. Figure 2 The winding structure 30 is used to wind up the holographic film 20 when it is not in use. Specifically, the winding structure 30 includes a roller 31 and a winding drive 32 that is driven by the roller 31. The winding drive 32 drives the roller 31 to rotate. The winding drive 32 is fixed to the frame of the windshield 10, and the roller 31 is arranged along the width or length direction of the windshield 10. In this embodiment, the winding drive 32 is a small motor, and the roller 31 is arranged horizontally at the top of the windshield 10.

[0041] The freeform mirror 40 is positioned below the windshield 10, at the location of the instrument panel. The freeform mirror 40 can reflect the light output from the image source 60 onto the windshield 10 at a specific incident angle (15° to 25°), thus achieving a compact optical path.

[0042] The switching structure 50 is used to switch the optical path. Specifically, the switching structure 50 includes a deflection drive 51 and a micromirror array 52. ​​The micromirror array 52 is connected to the deflection drive 51. The deflection drive 51 drives the micromirror array 52 to deflect at an angle of 12°, thus switching the optical path. When the micromirror array 52 is in the open state, it reflects light to the freeform mirror 40; when the micromirror array 52 is in the closed state, it guides light to the holographic film 20.

[0043] Image source 60 is used to generate virtual images. Image source 60 includes a light source electrically connected to a battery. The battery supplies power to image source 60, and the light intensity of the light source is adjusted by controlling the current supplied by the battery to image source 60. Specifically, in this application, the battery is a solar cell. The solar cell can absorb solar energy to prevent the information displayed on the HUD from being interfered with by light when the light intensity is too high, which would lead to a decrease in key indicators such as brightness and contrast, and thus affect the driver's clear recognition of the image. In this embodiment, the solar cell is a perovskite cell with a photoelectric conversion efficiency greater than 26%. Perovskite material has a high light absorption coefficient, which can reduce the recombination loss of photogenerated carriers and enhance the absorption efficiency of sunlight, thereby reducing the residual light intensity entering the HUD optical system. Specifically, the perovskite cell is integrated into the front end of the HUD or the glass interlayer of the roof, and actively absorbs and converts sunlight energy using its photovoltaic properties to form a "light barrier" effect, reducing the proportion of infrared and visible light directly entering the HUD light path.

[0044] The light source is an LED. When the perovskite battery is integrated into the HUD front end, the perovskite battery and the LED share a transparent conductive substrate. The perovskite battery converts ambient light into electrical energy to drive the LED. The light emitted by the LED is partially absorbed by the perovskite, forming a closed-loop system. The ambient light absorbed by the battery is converted into electrical energy and directly supplies the LED light source. Excess electrical energy can be stored in the vehicle battery, reducing dependence on external power supply while achieving dynamic balance of light intensity. Specifically, the perovskite battery communicates with the light sensor 90. Based on the light intensity data from the light sensor 90, it determines whether the current environment is strong or weak, and implements brightness grade compensation. In strong light environments, the LED brightness is increased to 120% of the rated brightness to compensate for ambient light interference, and in weak light environments, the brightness is reduced to 70% to avoid glare. Dynamic brightness adjustment enhances image contrast to 3000:1 and color gamut coverage by 30% to 110% of NTSC. While increasing the brightness of the image information on the windshield 10 to 100,000 nits, system power consumption is reduced by 50% from 200W, improving image quality and solving the problems of high power consumption and short lifespan in imaging systems. The membrane guiding structure 80 guides the extension and contraction of the holographic film 20. Without the guidance of the membrane guiding structure 80, the holographic film 20 cannot accurately adhere to the windshield 10 during extension, and wrinkles may occur during contraction.

[0045] Please continue reading. Figure 2In the first embodiment, the membrane guiding structure 80 includes a translation member 81, a second adsorption member 82, and a first adsorption member 83. The translation member 81 is fixed to the frame of the windshield 10, and the second adsorption member 82 is fixed to the output end of the translation member 81. The first adsorption member 83 is fixed to the side end of the holographic film 20 to avoid obstructing the driver's view 70. In use, the second adsorption member 82 and the first adsorption member 83 are adsorbed. The translation member 81 is a linear module, which moves the second adsorption member 82 and the first adsorption member 83, thereby pulling the holographic film 20 to keep it taut and flat. Specifically, the translation member 81 is fixed to the frame of the windshield 10 and is arranged along the height direction.

[0046] Please continue reading. Figure 3 In the second embodiment, the membrane guiding structure 80 includes a traction shaft 84 and a traction line 85. Traction grooves are provided on both sides of the windshield 10. The traction shaft 84 is fixed to the bottom of the windshield 10. One end of the traction line 85 is fixed to the traction shaft 84, and the other end is fixedly connected to the holographic film 20. Rotation of the traction shaft 84 causes the traction line 85 to shorten or lengthen, thereby tractioning the holographic film 20. The two sides of the holographic film 20 are located in the traction grooves.

[0047] A light sensor 90 is fixed to the windshield 10 to detect the intensity of ambient light, thereby determining the required imaging mode.

[0048] Please continue reading. Figure 4 as well as Figure 5When using the dual-imaging vehicle display device, the light sensor 90 detects the ambient light intensity and determines the desired imaging mode based on the ambient light intensity. When the desired imaging mode is holographic film 20, the scroll 31 rotates to extend the holographic film 20, and the film guiding structure 80 guides the holographic film 20 to unfold and attach it to the windshield 10. The micromirror array 52 deflects, and the light emitted by the image source 60 is guided by the micromirror array 52 to the holographic film 20 to achieve imaging. When the desired imaging mode is freeform mirror 40, the scroll 31 reverses, the holographic film 20 is rolled back onto the scroll 31, the micromirror array 52 deflects in the opposite direction, and the light emitted by the image source 60 is reflected by the micromirror array 52 to the freeform mirror 40. The freeform mirror 40 then transmits the light to the windshield 10 for imaging. The power supply controls the current supplied to the light source according to the light intensity data to adjust the intensity of the light source, so that the intensity of the light source is adjusted according to the ambient light intensity. Through the above design, the dual-imaging vehicle display device can switch between the holographic film 20 and the freeform mirror 40 according to the ambient light intensity. When the ambient light intensity is low, the holographic film 20 is used for imaging, resulting in good image quality and a wide viewing angle. When the ambient light intensity is high, the freeform mirror 40 is used for imaging, and the holographic film 20 is rolled up and stored, extending its service life. The combination of intelligent perovskite battery technology and the imaging switching technology of the freeform mirror 40 and the holographic film 20 significantly expands the projection area to over 20 inches when the holographic film is in imaging, increases the field of view (FOV) to over 15°*5°, and the virtual image distance to over 20m. This solves the problems of limited display area and insufficient information interaction in vehicle displays, and also solves the problem of burn-in due to sunlight backflow.

[0049] Please continue reading. Figure 6 The present invention also discloses a control method for the above-mentioned dual-imaging vehicle-mounted display device, comprising the following steps:

[0050] Determine the imaging mode: The light sensor 90 detects the intensity of the ambient light and determines the required imaging mode based on the intensity of the ambient light.

[0051] Holographic film 20 imaging: When the required imaging mode is holographic film 20 imaging, the scroll 31 rotates to extend the holographic film 20, the film guiding structure 80 guides the holographic film 20 to unfold and attach it to the windshield 10, the micromirror array 52 deflects, and the light emitted by the image source 60 is guided to the holographic film 20 through the micromirror array 52 to achieve imaging.

[0052] Imaging with the freeform mirror 40: When the required imaging mode is imaging with the freeform mirror 40, the scroll 31 is reversed, the holographic film 20 is wound up on the scroll 31, the micromirror array 52 is deflected in the opposite direction, and the light emitted by the image source 60 is reflected by the micromirror array 52 to the freeform mirror 40. The freeform mirror 40 transmits the light to the windshield 10 for imaging.

[0053] Specifically, in the imaging mode determination step, determining the required imaging mode based on the ambient light intensity also includes: the controller connects to the vehicle navigation system and the weather forecast system. The vehicle navigation system provides the vehicle's real-time location, and the weather forecast system provides the real-time weather status. When the ambient light intensity detected by the light sensor 90 is less than a threshold, the real-time vehicle location information and real-time weather status information are extracted to avoid false triggering caused by the vehicle entering tunnels or shaded areas. The aforementioned threshold is manually set based on the material properties of the holographic film 20. Avoiding false triggering caused by the vehicle entering tunnels or shaded areas can prevent frequent switching of imaging modes due to shaded areas and multiple short tunnels during driving, thus affecting driving. When the tunnel length is determined to be long based on the vehicle's real-time location and navigation path, requiring a long tunnel driving period, the system controls the switch to holographic film 20 imaging when the vehicle is in freeform mirror 40 imaging before entering the tunnel. Furthermore, the controller can control the switch in advance based on the vehicle's real-time location information, avoiding delays caused by the light sensor 90 controlling the switch based on ambient light detection.

[0054] The control method for the dual-imaging vehicle-mounted display device also includes a light source adjustment step. Specifically, the light source adjustment step involves the power supply controlling the current supplied to the light source based on light intensity data to adjust the light source intensity, thus adjusting the light source intensity according to the ambient light intensity. Specifically, the power supply controlling the current supplied to the light source based on light intensity data involves establishing a piecewise linear interpolation function to map the ambient light intensity to the LED driving current.

[0055] The battery is a solar cell, which absorbs solar energy to prevent light interference with the HUD display when light intensity is too high, thus preventing a decrease in key indicators such as brightness and contrast, and consequently affecting the driver's ability to clearly recognize the image. In this embodiment, the solar cell is a perovskite cell. Perovskite material has a high light absorption coefficient, which can reduce the recombination loss of photogenerated carriers and enhance the absorption efficiency of sunlight, thereby reducing the intensity of residual light entering the HUD optical system. Specifically, the perovskite cell is integrated into the front end of the HUD or the interlayer of the roof glass, utilizing its photovoltaic properties to actively absorb and convert sunlight energy, forming a "light barrier" effect, reducing the proportion of infrared and visible light directly entering the HUD light path.

[0056] The light source is an LED lamp. When the perovskite cell is integrated into the HUD front end, the perovskite cell and the LED lamp share the same substrate material, forming a closed-loop system. The sunlight energy absorbed by the cell directly supplies the LED light source, reducing dependence on external power supply while achieving dynamic balance of light intensity. Specifically, the perovskite cell communicates with the light sensor 90. Based on the light intensity data from the light sensor 90, it determines whether the current environment is strong or weak light. In strong light environments, the LED brightness is increased to compensate for ambient light interference, and in weak light environments, the brightness is reduced to avoid glare. Using a perovskite cell, the photoelectric conversion efficiency is greater than 26%. The perovskite cell adjusts the LED brightness, enhances display contrast, and improves color gamut coverage by 30%. While increasing the brightness of the image information on the windshield 10 to 100,000 nits, the system energy consumption is reduced by 50% from 200W, solving the problems of high energy consumption and short lifespan of imaging systems.

[0057] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of these fall within the protection scope of the present invention.

Claims

1. A dual-imaging vehicle-mounted display device, comprising a holographic film, a freeform mirror, and an image source, characterized in that, The dual-imaging vehicle-mounted display device also includes a light sensor, a roll-up structure, a switching structure, and a controller. The light sensor is installed on the windshield to detect the intensity of ambient light. The light sensor is communicatively connected to the controller to transmit the light intensity data to the controller in real time. The controller determines the current required imaging mode based on the light intensity data. The curling structure includes a roller and a winding drive connected to the roller in a driving connection. The holographic film is mounted on the roller, and the winding drive is communicatively connected to the controller. The switching structure includes a micromirror array and a deflection drive for driving the micromirror array to deflect, the deflection drive being communicatively connected to the controller; When holographic film imaging is required, the winding drive drives the spool to rotate, the holographic film extends and unfolds to adhere to the windshield, and the deflection drive drives the micromirror array to deflect. The light emitted from the image source is guided to the holographic film through the micromirror array to achieve imaging. When freeform mirror imaging is required, the winding drive drives the spool to reverse, the holographic film is wound onto the spool, and the deflection drive drives the micromirror array to deflect in the opposite direction. The light emitted from the image source is reflected by the micromirror array to the freeform mirror, and the freeform mirror transmits the light to the windshield for imaging.

2. The dual-imaging vehicle-mounted display device according to claim 1, characterized in that: The dual-imaging vehicle display device also includes a battery, the image source includes a light source, the battery is electrically connected to the light source, the battery supplies power to the light source, the battery is communicatively connected to the controller, and the controller controls the current supplied by the power source to the light source according to the light intensity data to adjust the intensity of the light source, so that the intensity of the light source is adjusted according to the light intensity of the ambient light.

3. The dual-imaging vehicle-mounted display device according to claim 2, characterized in that: The battery is a solar cell, and the light source is an LED lamp.

4. The dual-imaging vehicle-mounted display device according to claim 3, characterized in that: The solar cell is a perovskite cell, which is integrated into the front end of the HUD or the glass interlayer of the roof.

5. The dual-imaging vehicle-mounted display device according to claim 4, characterized in that: When the perovskite cell is integrated into the front end of the HUD, the perovskite cell and the LED light share a transparent conductive substrate. The perovskite cell converts ambient light into electrical energy to drive the LED. The light emitted by the LED is partially absorbed by the perovskite, forming a closed-loop system.

6. The dual-imaging vehicle-mounted display device according to claim 1, characterized in that: The dual-imaging vehicle display device further includes a film guiding structure, which includes a first adsorption member, a second adsorption member, and a translation member. The first adsorption member is fixed to the edge of the holographic film, the translation member is fixed to the frame of the windshield, and the second adsorption member is fixed to the output end of the translation member. The first adsorption member and the second adsorption member are adsorbed together. The translation member drives the second adsorption member to move along the length or width direction of the windshield to guide the holographic film to unfold, so that the holographic film is attached to the windshield after unfolding.

7. The dual-imaging vehicle-mounted display device according to claim 6, characterized in that: The scroll is located at the top of the windshield, and the translation component is located at the A-pillar.

8. The dual-imaging vehicle-mounted display device according to claim 1, characterized in that: The dual-imaging vehicle display device also includes a film guiding structure, which includes a traction shaft, a traction line, and a traction groove disposed on the windshield. The traction shaft is disposed opposite to the reel and is located on both sides of the windshield. The two ends of the traction line are fixed to the holographic film and the traction shaft, respectively. The holographic film is at least partially located in the traction groove. When the traction shaft rotates, the holographic film moves along the traction groove under the traction of the traction line.

9. A control method for a dual-imaging vehicle-mounted display device based on any one of claims 1-8, characterized in that, Includes the following steps: Determine the imaging mode: The light sensor detects the intensity of ambient light and determines the required imaging mode based on the intensity of ambient light; Holographic film imaging: When the desired imaging mode is holographic film imaging, the scroll rotates to extend the holographic film, the film guiding structure guides the holographic film to unfold and attach it to the windshield, the micromirror array deflects, and the light emitted from the image source is guided to the holographic film through the micromirror array to achieve imaging. Freeform mirror imaging: When the required imaging mode is freeform mirror imaging, the scroll is reversed, the holographic film is wound up on the scroll, the micromirror array is deflected in the opposite direction, the light emitted by the image source is reflected by the micromirror array to the freeform mirror, and the freeform mirror transmits the light to the windshield for imaging.

10. The control method for the dual-imaging vehicle-mounted display device according to claim 9, characterized in that: The control method for the dual-imaging vehicle-mounted display device further includes a light source adjustment step, which specifically involves the power supply controlling the current supplied to the light source according to the light intensity data to adjust the intensity of the light source, so that the intensity of the light source is adjusted according to the light intensity of the ambient light.

11. The control method for the dual-imaging vehicle-mounted display device according to claim 10, characterized in that: The power supply controls the current supplied to the light source based on the light intensity data, specifically by establishing a piecewise linear interpolation function to map the ambient light intensity to the LED driving current.

12. The control method for the dual-imaging vehicle-mounted display device according to claim 9, characterized in that: In the step of determining the imaging mode, determining the current required imaging mode based on the ambient light intensity further includes: the controller is connected to the vehicle navigation system and the weather forecast system. The vehicle navigation system provides the real-time location of the vehicle, and the weather forecast system provides the real-time weather status. When the ambient light intensity detected by the light sensor is less than a threshold, the real-time location information of the vehicle and the real-time weather status information are extracted to avoid false triggering caused by the vehicle entering tunnels or shaded areas.

Images