Display method and system

Abstract

The invention discloses a display method and system. The display system comprises windshield glass, a display device, a rotating mechanism and a detection device. The display method comprises the following steps: detecting whether a driver wears polarized sunglasses or not by using a detection device; based on the detection result, the polarization direction of the emergent light of the display device is switched through the rotating mechanism; and based on the switched polarization direction, projecting an image by using the display device and reflecting the image through the windshield glass to form a polarized light path adapted to the vision of the driver. Through cooperative control of the detection device and the rotating mechanism, automatic adaptation of the HUD polarization direction is realized.

Description

Technical Field

[0001] This application relates to the field of head-up displays, and more particularly to display methods and systems. Background Technology

[0002] A head-up display (HUD), also known as a parallel display system, is a driver-centric, blind-operated, multi-functional instrument panel. Its function is to project important driving information such as speed and navigation onto the windshield in front of the driver, allowing the driver to see this information without looking down or turning their head.

[0003] Traditional HUDs cannot adjust the screen's polarization direction. When drivers wear polarized sunglasses, the conflicting polarization directions can easily lead to problems such as dimmed images, ghosting, or even complete image loss. Existing solutions involve adding polarization adjustment lenses or employing complex optical compensation structures. However, the increased number of optical components can cause more internal and external light reflections, creating stray light and affecting image quality. Furthermore, the additional optical components and control modules can increase system size and cost. Moreover, adjusting the polarization direction requires manual mode switching by the driver, which is cumbersome and poses safety hazards. Therefore, achieving compatibility between HUDs and polarized sunglasses in a low-complexity and low-cost manner has become a key direction for current technological optimization. Summary of the Invention

[0004] The main purpose of this application is to provide a display method and system that aims to achieve head-up display in a low-complexity manner.

[0005] To achieve the above objectives, this application provides a display method applied to a display system, the display system including a display device, a rotating mechanism, and a detection device, wherein the display device is mechanically coupled to the rotating mechanism, and the display method includes:

[0006] The detection device is used to detect whether the driver is wearing polarized sunglasses;

[0007] Based on the detection results, the polarization direction of the light emitted by the display device is switched by the rotating mechanism;

[0008] Based on the switched polarization direction, the display device projects an image and reflects it through the windshield to form a polarized light path adapted to the driver's vision.

[0009] In one embodiment, the detection device includes an infrared transmitter and a receiving detector, and the step of using the detection device to detect whether the driver is wearing polarized sunglasses includes:

[0010] The infrared emitter emits polarized infrared light toward the driver's eye area;

[0011] The intensity of infrared light reflected from the driver's eyes is collected using the receiving detector;

[0012] If the intensity of the infrared light detected is not greater than a preset threshold, it is determined that the driver is wearing polarized sunglasses; otherwise, it is determined that the driver is not wearing polarized sunglasses.

[0013] In one embodiment, the step of switching the polarization direction of the light emitted from the display device via the rotating mechanism based on the detection result includes:

[0014] Based on the detection results, determine whether a rotation command needs to be issued;

[0015] If so, then based on the rotation command, control the rotation mechanism to change the polarization direction of the light emitted from the display device;

[0016] If not, then maintain the current polarization direction of the display device.

[0017] In one embodiment, the rotating mechanism includes a 0-position switch and a 1-position switch, and the step of controlling the rotating mechanism to change the polarization direction of the light emitted from the display device based on the rotation command includes:

[0018] Based on the rotation command, the rotation mechanism is controlled to drive the display device to rotate to the 0 position switch, so as to switch the polarization state of the light emitted by the display device to S-polarized light;

[0019] Alternatively, the rotating mechanism can be controlled to drive the display device to rotate to position 1, thereby switching the polarization state of the light emitted by the display device to P-polarized light;

[0020] In this configuration, the length direction of the vehicle body is taken as the X-axis, the width direction as the Y-axis, and the height direction as the Z-axis. The propagation plane of the light emitted from the display device is the XZ plane. The P-polarized light is polarized light whose electric field vector vibration direction is parallel to the XZ plane, and the S-polarized light is polarized light whose electric field vector vibration direction is perpendicular to the XZ plane.

[0021] In one embodiment, the step of projecting an image using the display device based on the switched polarization direction and reflecting it through the windshield to form a polarized light path adapted to the driver's vision includes:

[0022] Based on the switched polarization direction, light with a specific polarization direction is emitted through the display device;

[0023] The light path is adjusted by a reflective device to guide the light to a preset reflective area of ​​the windshield;

[0024] The light is reflected by the windshield to form a polarized light transmission path that matches the driver's field of view, and the reflection by the windshield forms an image that can be observed by the driver.

[0025] A display system, the display system comprising:

[0026] A display device is used to emit light with a specific polarization direction to reflect onto the windshield of a vehicle, forming an image that can be viewed by the driver.

[0027] A rotating mechanism is used to change the polarization direction of the light emitted from the display device; the display device is mechanically coupled to the rotating mechanism;

[0028] A detection device used to detect whether a driver is wearing polarized sunglasses.

[0029] In one embodiment, the detection device includes:

[0030] An infrared emitter is used to emit infrared polarized light toward the driver's eye area;

[0031] A receiver detector is used to collect the intensity of infrared light reflected from the driver's eyes.

[0032] In one embodiment, the rotating mechanism includes:

[0033] The 0-position switch is used to control the screen of the display device to rotate along the optical axis, so that the polarization direction of the light emitted from the screen is rotated to be perpendicular to the light propagation plane.

[0034] A 1-position switch is used to control the screen of the display device to rotate along the optical axis, so that the polarization direction of the light emitted from the screen is rotated to be parallel to the light propagation plane.

[0035] In one embodiment, the display system further includes an interactive control module, which includes physical buttons or virtual on-screen buttons for responding to the driver's operating commands to control the activation and deactivation of the detection device.

[0036] In one embodiment, the display system further includes a reflective device for receiving light emitted from the display device and adjusting the propagation direction of the light to guide the light to a preset reflective area of ​​the windshield.

[0037] One or more technical solutions proposed in this application have at least the following technical effects:

[0038] This application achieves automatic adaptation of the HUD's polarization direction through the coordinated control of a detection device and a rotating mechanism. When the driver wears polarized sunglasses, the polarization direction of the emitted light is switched, avoiding the image attenuation or disappearance problems caused by polarization conflicts in traditional HUDs, ensuring display clarity and visibility. Compared to existing technologies, this eliminates the need for complex optical compensation components or manual adjustment steps, simplifying the polarization adjustment logic through a mechanical rotating mechanism, thus reducing system size and cost. Simultaneously, the automated detection and switching mechanism reduces driver intervention, improving driving safety. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the display system shown in this application;

[0040] Figure 2 This is a flowchart illustrating the first embodiment of this application;

[0041] Figure 3 This is a flowchart illustrating the second embodiment of this application;

[0042] Figure 4 This is a flowchart illustrating the third embodiment of this application;

[0043] Figure 5 This is a flowchart illustrating the fifth embodiment of this application.

[0044] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0045] Description of Figure Numbers:

[0046] 1. Windshield; 2. Display device; 3. Rotating mechanism; 4. Detection device; 5. Reflecting device. Detailed Implementation

[0047] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0049] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0050] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0051] The main technical solution of this application is as follows: a detection device is used to detect whether the driver is wearing polarized sunglasses; based on the detection result, the polarization direction of the light emitted from the display device is switched by a rotating mechanism; based on the switched polarization direction, an image is projected by the display device and reflected by the windshield to form a polarized light path adapted to the driver's vision, and an image that can be observed by the driver is formed on the windshield.

[0052] This application takes into account the problem that when drivers wear polarized sunglasses, the resulting image darkening, ghosting, or even complete loss of display due to polarization direction conflict can lead to various issues. Existing solutions involve adding polarization adjustment lenses or employing complex optical compensation structures. However, the addition of optical components can increase the likelihood of internal and external light reflection, creating stray light and affecting image quality. Furthermore, the additional optical components and control modules can increase system size and cost. Moreover, adjusting the polarization direction requires manual mode switching by the driver, which is cumbersome and poses safety hazards.

[0053] Based on this, this application proposes a display method and system.

[0054] Specifically, please refer to Figure 1 In the first embodiment of this application, the display system includes:

[0055] Display device 2 is used to emit light with a specific polarization direction to reflect onto the windshield 1 of the vehicle to form an image that can be observed by the driver.

[0056] The rotating mechanism 3 is used to change the polarization direction of the light emitted from the display device 2; the display device 2 is mechanically coupled to the rotating mechanism 3.

[0057] A detection device used to detect whether a driver is wearing polarized sunglasses.

[0058] Preferably, an anti-reflective coating is applied to the inner surface of the windshield, which effectively improves its reflection efficiency for light with a specific polarization direction, thereby enhancing the brightness and clarity of the image displayed on the windshield. This design optimizes the optical reflection characteristics of the windshield, ensuring that polarized light emitted from the display device, after switching to either S or P polarization, is reflected to the driver's field of vision at a higher proportion without introducing additional optical path loss or stray light interference, thus creating a synergistic effect with the system's existing polarization switching mechanism.

[0059] Preferably, the display device adopts an integrated architecture of an LCD screen and a Mini-LED light source module. The Mini-LED light source module uses an array of micron-level LED chips to achieve localized dynamic dimming, significantly improving the peak brightness and contrast of the LCD screen and ensuring image clarity and color performance even in strong light environments. This combined architecture maintains the original polarized light output characteristics of the LCD screen while using the high brightness of the Mini-LED to compensate for the light efficiency loss of traditional backlight modules, ensuring sufficient brightness even when switching to P-polarized light mode after penetrating polarized sunglasses. Simultaneously, the low power consumption of the Mini-LED module synergizes with the mature driving solution of the LCD screen, improving display performance without increasing system energy consumption. This, combined with the mechanical reliability design of the rotating mechanism, forms a technological complement, jointly optimizing the overall display effect and energy efficiency ratio of the HUD system.

[0060] Preferably, the rotating mechanism employs a stepper motor-driven LCD screen rotating frame, which is rigidly mechanically coupled to the display device via a coupling. When the system receives a polarization switching command, the stepper motor receives a pulse signal to drive the rotating frame to rotate. Through real-time position feedback and a closed-loop control algorithm, the LCD screen is ensured to switch between position 0 (S polarization) and position 1 (P polarization), while also supporting arbitrary angle stops between the two extreme positions. This design retains the low-cost advantage of mechanical rotation schemes while improving the stability and response speed of polarization adjustment through the digital control characteristics of the stepper motor, effectively avoiding the significant loss of light efficiency caused by traditional waveplate schemes.

[0061] Based on the display system of the first embodiment of this application, referring to... Figure 2 The display method includes steps S10 to S30:

[0062] Step S10: Use the detection device to detect whether the driver is wearing polarized sunglasses;

[0063] Step S20: Based on the detection results, the polarization direction of the light emitted from the display device is switched by the rotating mechanism;

[0064] Step S30: Based on the switched polarization direction, the display device is used to project an image and reflect it through the windshield to form a polarized light path adapted to the driver's vision.

[0065] Specifically, in the first embodiment of this application, the display system is composed of a display device 2, a rotating mechanism 3, and a detection device. The display device 2 uses an LCD screen as a polarized light emission source, and it is mechanically coupled with the rotating mechanism 3, which can switch the polarization direction of the emitted light through rotation.

[0066] When the driver enters the cockpit, the system automatically activates the detection device, which continuously monitors the driver's eye area to identify whether polarized sunglasses are being worn, and transmits the detection signal to the system control unit in real time. When the driver is not wearing polarized sunglasses, the detection device sends back an initial state signal, and the rotating mechanism 3 remains stationary at position 0. At this time, the LCD screen emits S-polarized light. This light is directly projected onto the optical reflection area of ​​the windshield 1, and after reflection by the windshield 1, forms a light path that matches the driver's natural field of view, ultimately presenting a clear image in the driver's forward field of vision. If the detection device detects that the driver is wearing polarized sunglasses, the control unit immediately triggers the rotating mechanism 3, driving the LCD screen to rotate 90° around the optical axis to the locked position at position 1, switching the emitted light from the screen to P-polarized light. Because the polarization filtering characteristics of polarized sunglasses allow P-polarized light to pass through, the switched light can penetrate the sunglasses lens after reflection by the windshield 1, ensuring that the image is displayed normally in the driver's field of vision, effectively avoiding the image blanking problem caused by polarization direction conflict in traditional HUDs. Through the coordinated control of the display device 2, the rotating mechanism 3 and the detection device, the system achieves adaptive compatibility with different wearing states without adding additional optical components, maintaining the imaging quality of the original optical path while simplifying the structural design and cost control.

[0067] Based on the first embodiment of this application, in the second embodiment of this application, the detection device includes:

[0068] An infrared emitter is used to emit infrared polarized light toward the driver's eye area;

[0069] A receiver detector is used to collect the intensity of infrared light reflected from the driver's eyes.

[0070] Optionally, a high-precision CMOS camera can be used to capture visible light images of the driver's eye area, and the wearing status can be identified by analyzing changes in the energy of reflected light. When the driver wears sunglasses (including polarized sunglasses), the lenses absorb some light, resulting in a reduction in reflected light energy. By comparing the energy value of the corneal reflected light spot in the image with the baseline value when not wearing sunglasses (e.g., if the energy attenuation ratio exceeds a preset threshold), it can be determined whether sunglasses are being worn. Its advantage lies in achieving light energy detection through a single camera, avoiding the dependence on light source calibration in traditional infrared detection solutions, while simplifying image analysis logic and improving recognition stability.

[0071] Optionally, infrared light with P-polarization and S-polarization directions can be emitted in a time-division manner, and the intensity of reflected light under different polarization states can be collected using the same receiving detector. Specifically, the infrared transmitter alternately outputs P / S polarized light, and the receiving detector separates the two signals by synchronous demodulation and calculates the intensity difference ΔI = IP - IS. When the driver is not wearing polarized sunglasses, the intensity difference ΔI of the P / S polarized light reflected from the eye is small; however, when wearing polarized sunglasses, the lenses selectively absorb light polarized in a specific direction, resulting in a significant increase in ΔI. The wearing status is determined based on the change in ΔI, and combined with differential processing of the dual-channel signals, interference from ambient light fluctuations and detector noise is effectively offset, improving the recognition accuracy.

[0072] Based on the first embodiment of this application, refer to Figure 3 In the second embodiment of this application, the detection device includes an infrared transmitter and a receiving detector, and step S10 includes steps S11 to S13:

[0073] Step S11: Use an infrared emitter to emit infrared polarized light toward the driver's eye area;

[0074] Step S12: The intensity of infrared light reflected from the driver's eyes is collected using a receiving detector;

[0075] Step S13: If the intensity of the infrared light detected is not greater than a preset threshold, it is determined that the driver is wearing polarized sunglasses; otherwise, it is determined that the driver is not wearing polarized sunglasses.

[0076] Specifically, in the second embodiment of this application, an infrared emitter continuously emits infrared polarized light directionally toward the driver's eye area. After being reflected by the eye tissue, the reflected light intensity signal is collected in real time by a receiving detector. A preset reflected light intensity threshold Y is dynamically calibrated based on the reference reflectance value X when not wearing polarized sunglasses (typically Y is set to 60% to 70% of X). When the driver is not wearing polarized sunglasses, the reflected light intensity collected by the receiving detector remains above the X value. The microprocessor determines that the driver is not wearing sunglasses and therefore does not need to issue a rotation command, allowing the display device to continuously emit S-polarized light. If the driver is wearing polarized sunglasses, the polarization filtering characteristics of the lenses will significantly attenuate the reflected intensity of the infrared polarized light. When the value detected by the receiving detector drops below the threshold Y, the microprocessor immediately triggers a switching signal, controlling the rotation mechanism to drive the display device to rotate 90°, switching the emitted light to P-polarized light. Through the directional emission and intensity detection of infrared light, contactless identification of the wearing status is achieved. This mechanism, together with the display device and the rotation mechanism, forms a closed-loop control, ensuring that the polarization direction switching matches the driver's actual wearing situation in real time.

[0077] Based on the first embodiment, in the third embodiment of this application, reference is made to... Figure 4 Step S20 includes steps S21 to S23:

[0078] Step S21: Based on the detection results, determine whether a rotation command needs to be issued;

[0079] Step S22: If yes, then based on the rotation command, control the rotation mechanism to change the polarization direction of the light emitted from the display device;

[0080] Step S23: If not, maintain the current polarization direction of the display device.

[0081] Specifically, the detection device transmits the collected infrared reflected light intensity signal to the control unit in real time. The microprocessor built into the control unit compares the real-time detection value with a preset threshold Y, which is dynamically adjusted based on the reference reflectance value X when not wearing polarized sunglasses. When the detection value is greater than Y, it is determined that the driver is not wearing polarized sunglasses. The control unit does not need to issue a rotation command; the stepper motor of the rotation mechanism maintains the current angle, and the display device continuously outputs S-polarized light. If the detection value drops below Y, the microprocessor generates a control signal containing rotation direction and angle parameters, which is transmitted to the rotation mechanism via the CAN bus. After receiving the command, the rotation mechanism drives the polarizer module of the display device to rotate. Throughout the switching process, the control unit continuously receives status feedback from the detection device to ensure that the polarization direction of the display device is always matched with the driver's wearing status in real time, avoiding erroneous switching due to ambient light fluctuations or changes in head posture.

[0082] The step of controlling the rotation mechanism to change the polarization direction of the light emitted from the display device based on the rotation command includes steps S221 to S222:

[0083] Step S221: Based on the rotation command, control the rotation mechanism to drive the display device to rotate to the 0 position switch, so as to switch the polarization state of the light emitted by the display device to S-polarized light;

[0084] Step S222, or, control the rotating mechanism to drive the display device to rotate to position 1, so as to switch the polarization state of the light emitted by the display device to P-polarized light.

[0085] It should be noted that, with the length direction of the vehicle body as the X-axis, the width direction as the Y-axis, and the height direction as the Z-axis, the propagation plane of the light emitted from the display device is the XZ plane, the P-polarized light is polarized light with the electric field vector vibration direction parallel to the XZ plane, and the S-polarized light is polarized light with the electric field vector vibration direction perpendicular to the XZ plane.

[0086] In this embodiment, the rotation mechanism achieves the switching of the polarization direction of the display device through the position detection functions of the 0-position switch and the 1-position switch. Specifically, after the control unit generates a rotation command, it parses the rotation command to obtain the position signal corresponding to the target polarization state and drives the stepper motor built into the rotation mechanism to start. The motor drives the polarizer module of the display device to rotate through a gear set. When the module rotates to the S-polarization position, it triggers the mechanical contact of the 0-position switch, generating a low-level signal and feeding it back to the control unit. The control unit then cuts off the motor drive current, completing the switch from P-polarization to S-polarization. If the target is the P-polarization state, the motor drives the module to continue rotating until the 1-position switch is triggered. At this time, the switch sends a high-level signal. After receiving the signal, the control unit stops the motor, completing the conversion from S-polarization to P-polarization. The control unit records the current switch state in real time as the reference position for the next switch, ensuring the accuracy and reliability of the polarization state switching.

[0087] In one feasible implementation, in the third embodiment of this application, the rotating mechanism includes:

[0088] The 0-position switch is used to control the screen of the display device to rotate along the optical axis, so that the polarization direction of the light emitted from the screen is rotated to be perpendicular to the light propagation plane.

[0089] A 1-position switch is used to control the screen of the display device to rotate along the optical axis, so that the polarization direction of the light emitted from the screen is rotated to be parallel to the light propagation plane.

[0090] Specifically, when the 0-position switch is triggered, it drives the screen of the display device to rotate along the optical axis, causing the polarization direction of the emitted light to rotate perpendicular to the light propagation plane, thus converting the originally emitted P-polarized light into S-polarized light. When the 1-position switch is activated, it controls the screen to rotate along the optical axis, causing the polarization direction of the emitted light to rotate parallel to the light propagation plane, thus switching the S-polarized light back to P-polarized light. This rotation mechanism achieves rapid switching of polarization direction by changing the relative angle between the screen's light polarization direction and the light propagation plane, adapting to optical scenarios requiring different polarization states.

[0091] In one feasible implementation, based on the first embodiment, in the fourth embodiment of this application, the display system further includes an interactive control module, which includes physical buttons or virtual buttons on the screen, for responding to the driver's operation commands to control the activation and deactivation of the detection device.

[0092] In this embodiment, the display system includes an interactive control module, which enables human-computer interaction through either physical buttons or virtual on-screen buttons. The driver can manually trigger operation commands as needed, such as pressing the "detection off" button when entering a tunnel or driving at night. The system then cuts off the infrared emission circuit of the detection device to reduce power consumption. After exiting a complex lighting environment, pressing the button again reactivates the detection function. This embodiment retains the intelligent advantages of automatic detection while enhancing flexibility in extreme scenarios through a manual intervention mechanism, forming a dual-mode control logic of "automatic as the primary mode and manual as the secondary mode."

[0093] For a feasible implementation method, please refer to Figure 1 In the fifth embodiment of this application, based on the first embodiment, the display system further includes a reflective device 4, which is used to receive the light emitted by the display device and adjust the propagation direction of the light to guide the light to a preset reflective area of ​​the windshield.

[0094] Furthermore, referring to Figure 5 In the fifth embodiment of this application, step S30 includes steps S31 to S33:

[0095] Step S31: Based on the switched polarization direction, light with a specific polarization direction is emitted through the display device;

[0096] Step S32: Adjust the optical path of the light through the reflection device and guide the light to the preset reflection area of ​​the windshield;

[0097] Step S33: The light is reflected by the windshield to form a polarized light transmission path that matches the driver's field of view, and an image that can be observed by the driver is formed by the reflection of the light by the windshield.

[0098] Specifically, the display device 2 emits light with a specific vibration direction according to the switched polarization direction. This light is guided by the reflector 5 to a preset reflection area of ​​the windshield 1 (typically located in the upper middle part of the windshield, 1.2m to 1.5m in front of the driver). The windshield 1 reflects the light to form a transmission path that matches the driver's field of view, and finally, through reflection from the surface of the windshield 1, a suspended image with a certain projection distance is formed. Throughout the process, the directional transmission of polarized light effectively filters out ambient stray light interference, ensuring that the driver can clearly read key information such as vehicle speed and navigation without adjusting their line of sight. In one feasible embodiment, the reflector is a composite optical path structure composed of a curved reflector and a wedge prism. This structure reflects and refracts the light twice, compressing the original divergence angle and guiding it to the preset reflection area of ​​the windshield.

[0099] In another feasible implementation, the reflecting device can employ a folded optical path structure composed of an aspherical mirror and a plane mirror. The aspherical mirror, through its special curved surface design, performs the first reflection of light, using the curvature change of the surface to gradually compress the divergence angle of the original light rays, while correcting spherical aberration to improve the parallelism of the light rays. Subsequently, the plane mirror, installed at a preset angle, completes the second reflection, guiding the pre-adjusted light rays to the designated reflection area of ​​the windshield. This structure reduces light energy loss through the optimization of the number of reflections, and the aspherical design can adapt to the transmission characteristics of different wavelengths of light.

[0100] In summary, in the fifth embodiment of this application, the display device emits light rays in a specific direction according to the switched polarization direction, which are then guided to a preset area of ​​the windshield by the reflector. The reflected light rays from the windshield form a transmission path that matches the driver's field of view, effectively filtering out ambient stray light interference. Finally, the light rays are reflected off the glass surface to form a clear floating image, ensuring that the driver can read key information such as vehicle speed and navigation without adjusting their line of sight, thereby improving driving safety and information acquisition efficiency.

[0101] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or approach that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or approach. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or approach that includes that element.

[0102] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0103] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of the present invention.

[0104] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A display method, characterized in that, Applied to a display system, the display system including a display device, a rotating mechanism, and a detection device, the display device being mechanically coupled to the rotating mechanism, the display method comprising: The detection device is used to detect whether the driver is wearing polarized sunglasses; Based on the detection results, the polarization direction of the light emitted by the display device is switched by the rotating mechanism; Based on the switched polarization direction, the display device projects an image and reflects it through the windshield to form a polarized light path adapted to the driver's vision.

2. The display method as described in claim 1, characterized in that, The detection device includes an infrared transmitter and a receiver detector, and the step of using the detection device to detect whether the driver is wearing polarized sunglasses includes: The infrared emitter emits polarized infrared light toward the driver's eye area; The intensity of infrared light reflected from the driver's eyes is collected using the receiving detector; If the intensity of the infrared light detected is not greater than a preset threshold, it is determined that the driver is wearing polarized sunglasses; otherwise, it is determined that the driver is not wearing polarized sunglasses.

3. The display method as described in claim 1, characterized in that, The step of switching the polarization direction of the light emitted from the display device through the rotating mechanism based on the detection results includes: Based on the detection results, determine whether a rotation command needs to be issued; If so, then based on the rotation command, control the rotation mechanism to change the polarization direction of the light emitted from the display device; If not, then maintain the current polarization direction of the display device.

4. The display method as described in claim 3, characterized in that, The rotating mechanism includes a 0-position switch and a 1-position switch. The step of controlling the rotating mechanism to change the polarization direction of the light emitted from the display device based on the rotation command includes: Based on the rotation command, the rotation mechanism is controlled to drive the display device to rotate to the 0 position switch, so as to switch the polarization state of the light emitted by the display device to S-polarized light; Alternatively, the rotating mechanism can be controlled to drive the display device to rotate to position 1, thereby switching the polarization state of the light emitted by the display device to P-polarized light; In this configuration, the length direction of the vehicle body is taken as the X-axis, the width direction as the Y-axis, and the height direction as the Z-axis. The propagation plane of the light emitted from the display device is the XZ plane. The P-polarized light is polarized light whose electric field vector vibration direction is parallel to the XZ plane, and the S-polarized light is polarized light whose electric field vector vibration direction is perpendicular to the XZ plane.

5. The display method as described in claim 1, characterized in that, The step of projecting an image using the display device based on the switched polarization direction and reflecting it through the windshield to form a polarized light path adapted to the driver's vision includes: Based on the switched polarization direction, light with a specific polarization direction is emitted through the display device; The light path is adjusted by a reflective device to guide the light to a preset reflective area of ​​the windshield; The light is reflected by the windshield to form a polarized light transmission path that matches the driver's field of view, and the reflection by the windshield forms an image that can be observed by the driver.

6. A display system, characterized in that, The display system includes: A display device is used to emit light with a specific polarization direction to reflect onto the windshield of a vehicle, forming an image that can be viewed by the driver. A rotating mechanism is used to change the polarization direction of the light emitted from the display device; the display device is mechanically coupled to the rotating mechanism; A detection device used to detect whether a driver is wearing polarized sunglasses.

7. The display system as described in claim 6, characterized in that, The detection device includes: An infrared emitter is used to emit infrared polarized light toward the driver's eye area; A receiver detector is used to collect the intensity of infrared light reflected from the driver's eyes.

8. The display system as described in claim 6, characterized in that, The rotating mechanism includes: The 0-position switch is used to control the screen of the display device to rotate along the optical axis, so that the polarization direction of the light emitted from the screen is rotated to be perpendicular to the light propagation plane. A 1-position switch is used to control the screen of the display device to rotate along the optical axis, so that the polarization direction of the light emitted from the screen is rotated to be parallel to the light propagation plane.

9. The display system as described in claim 6, characterized in that, The display system also includes an interactive control module, which includes physical buttons or virtual buttons on the screen, for responding to the driver's operation commands to control the activation and deactivation of the detection device.

10. The display system as claimed in claim 6, characterized in that, The display system also includes a reflective device for receiving light emitted from the display device and adjusting the propagation direction of the light to guide it to a preset reflective area of ​​the windshield.

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