Alarm display method, display device, storage medium and vehicle

Abstract

The invention relates to the technical field of projection display, in particular to an alarm display method, display equipment, a storage medium and a vehicle. According to whether the interior of the vehicle is in the noisy environment or not, the vehicle is divided into different levels, and the required projection information is displayed in the corresponding display mode on the corresponding level, so that the alarm prompting capability in the noisy environment is enhanced, a user can timely find the alarm information in the projection information, and the user experience is improved. And the driving behavior of the driver is not excessively interfered. The method can adapt to different environments, adopts a flexible alarm form in the display area of the HUD projection, improves the alarm capability for a driver, and optimizes the watching experience of a user.

Description

Technical Field

[0001] The present application relates to the field of projection display technology, and in particular to an alarm display method, a display device, a storage medium and a vehicle. Background Art

[0002] HUD (Head Up Display) is a new way to realize in-vehicle display by using reflection on the vehicle windshield. Specifically, the display light is emitted by the optical machine of the HUD display device, and is projected on the windshield through the corresponding optical lens to produce a corresponding virtual image, which forms an enhanced display effect with the real world outside the windshield. However, the functions of current HUD display devices are mainly limited to instrument display related functions and driving navigation, etc., lacking reliable warnings for the vehicle's environment, and unable to help drivers discover potential driving hazards in a timely manner. Summary of the invention

[0003] The purpose of the present application is to provide a warning display method, a display device, a storage medium and a vehicle, which solve the technical problem that the HUD display device in the prior art has a single display function and cannot provide reliable warnings in the driving environment.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions.

[0005] In a first aspect, the present application provides an alarm display method, comprising: The display device projects a display area on the front windshield of the vehicle; In response to the vehicle being in a noisy environment, the display area is configured to display projection information in a normal mode; In response to the vehicle being in a noisy environment, the display area is configured to display projection information in a warning mode; In the warning mode, the projection information includes warning information in a first output state, and the first output state is a display state excluded from the normal mode.

[0006] According to the above description, an optional implementation manner determines the display mode of the HUD projection according to the noise environment in the vehicle, and adopts a display mode that is easier for the driver to notice in a noisy environment where it is difficult for the driver to notice the warning information.

[0007] In an optional implementation of the first aspect, the noisy environment is determined based on a microphone in the vehicle.

[0008] In an optional implementation of the first aspect, the noisy environment is determined according to the output power of the vehicle audio system.

[0009] According to the above description, an optional implementation method can determine the noise environment level in the car through the actual external volume of the microphone or the car audio in the car, providing an external basis for determining the display mode of the HUD projection.

[0010] In an optional implementation manner of the first aspect, the warning information is a first warning type from the vehicle itself or a second warning type from outside the vehicle.

[0011] In an optional implementation of the first aspect, the priority of the first alarm type is higher than the priority of the second alarm type.

[0012] In an optional implementation manner of the first aspect, the first alarm type includes at least one of a vehicle door not closed, a seat belt not fastened, a fault warning, and a vehicle speeding.

[0013] In an optional implementation manner of the first aspect, the second alarm type includes at least one of a horn reminder for a vehicle on the left, a horn reminder for a vehicle on the right, and a horn reminder for a vehicle behind.

[0014] In an optional implementation of the first aspect, the second alarm type is determined according to a microphone arranged outside the vehicle.

[0015] According to the above description, an optional implementation method divides the warning types into two categories: internal sources and external sources, so that different methods are used to prompt in the display area of ​​the HUD projection to ensure the driving safety of the driver.

[0016] In an optional implementation of the first aspect, the first output state also includes reducing the playback volume of entertainment audio in the vehicle.

[0017] According to the above description, an optional implementation method takes active control of noisy sounds in the car for specific types of alarm types, especially reducing entertainment audio such as music and broadcasting with relatively low priority, so that the alarm information can be transmitted to the driver without interference.

[0018] In an optional implementation manner of the first aspect, in the alarm mode, the alarm information in the first output state included in the projection information includes: The warning information includes a horn reminder for the vehicle on the left, a horn reminder for the vehicle on the right and / or a horn reminder for the vehicle behind; In response to the position of the horn reminder relative to the vehicle, the warning information is displayed at a corresponding position in the display area.

[0019] According to the above description, an optional implementation method can intuitively identify the external direction of the honking vehicle based on the position of the warning information in the display area, and remind the driver to pay attention to the surrounding driving environment.

[0020] In an optional implementation manner of the first aspect, in the alarm mode, the projection information includes the alarm information in the first output state, including: The warning information includes a horn reminder for the vehicle on the left, a horn reminder for the vehicle on the right and / or a horn reminder for the vehicle behind; The first output state also includes driving the vehicle audio system to play an alarm tone.

[0021] In an optional implementation manner of the first aspect, the first output state further includes driving the vehicle audio system to play an alarm tone, including: The whistle sound collected by the microphone outside the car is played through the car audio.

[0022] In an optional implementation manner of the first aspect, the first output state further includes driving the vehicle audio system to play an alarm tone, including: In response to the position of the horn reminder relative to the vehicle, at least a first vehicle audio system located on the left side of the vehicle and a second vehicle audio system located on the right side of the vehicle are controlled to achieve spatial rendering of the audio to simulate the sound source direction of the horn vehicle.

[0023] According to the above description, an optional implementation method can use the vehicle audio system to directly reproduce the external horn sound, avoiding the attenuation effect of the vehicle shell and windshield on the external sound, and providing the driver with a real warning reminder experience.

[0024] In an optional implementation of the first aspect, the alarm display method further includes: In the normal mode, the projection information includes warning information in a second output state, and the first output state is more eye-catching than the second output state.

[0025] In an optional implementation manner of the first aspect, the projection information includes warning information in a second output state, and the first output state is more eye-catching than the second output state, including: The size of the warning information in the first output state is greater than the size of the warning information in the second output state.

[0026] In an optional implementation manner of the first aspect, the size of the warning information in the first output state is larger than the size of the warning information in the second output state, including: The warning information in the first output state is displayed in a floating manner in the display area to cover at least a portion of the projection information that is normally displayed; The warning information in the second output state is displayed in an embedded manner in the display area to be consistent with the size of the projection information displayed normally.

[0027] According to the above description, an optional implementation manner may display more eye-catching warning information in the warning mode to increase the driver's attention thereto.

[0028] In an optional implementation manner of the first aspect, the projection information includes warning information in a second output state, and the first output state is more eye-catching than the second output state, including: At least part of the warning information in the first output state is displayed on the instrument and / or the central control screen in normal mode to provide a prompt.

[0029] According to the above description, in an optional implementation mode, part of the warning information in the first output state is not displayed directly in the display area, but is only displayed conventionally on the instrument or central control screen. In the warning mode, the corresponding part of the warning information will be displayed on the display area directly facing the human eye to improve the warning ability to the driver.

[0030] In an optional implementation manner of the first aspect, in the alarm mode, the projection information includes the alarm information in the first output state, including: The warning information is of the second warning type; In response to the vehicle being in a complex road condition, the warning information in the first output state is switched to a third output state, and the third output state is more eye-catching than the first output state.

[0031] In an optional implementation of the first aspect, the third output state includes reducing the playback volume of entertainment audio in the vehicle.

[0032] In an optional implementation of the first aspect, the responding to the vehicle being in a complex road condition includes: A microphone set up outside the car detected the continuous honking sound.

[0033] In an optional implementation of the first aspect, the responding to the vehicle being in a complex road condition includes: The microphone installed outside the vehicle detects that the number of vehicles honking their horns exceeds a third threshold.

[0034] According to the above description, in an optional implementation mode, when the vehicle is in a noisy environment and the road conditions outside the vehicle are complex, the second alarm type adopts a display mode with more warning capabilities to distinguish it from the first output state. At the same time, unlike the high priority of the first alarm type, the warning capability is gradually improved to reduce unnecessary information interference.

[0035] In an optional implementation manner of the first aspect, the vehicle being in a noisy environment includes: In response to the decibel of sound inside the vehicle exceeding a first threshold, it is determined that the interior of the vehicle is in a noisy environment.

[0036] In an optional implementation manner of the first aspect, the vehicle being in a noisy environment includes: In response to the decibel level of the sound in the vehicle exceeding a first threshold, prompting a control volume in the display area; The duration of the prompt to control the volume in the display area reaches the second threshold, and the decibel of the sound in the car still exceeds the first threshold, and it is determined that the car is in a noisy environment.

[0037] In an optional implementation of the first aspect, determining that the vehicle interior is in a noisy environment includes: In response to the sound decibel in the vehicle being lower than the first threshold, it is determined that the vehicle is not in a noisy environment.

[0038] According to the above description, the optional implementation method realizes accurate switching of noisy environments, ensures that the projection information in the display area can be in a suitable display mode, and improves the viewing experience of the driver.

[0039] In a second aspect, the present application provides a display device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the alarm display method described in the first aspect when executing the computer program.

[0040] In a third aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the alarm display method described in the first aspect are implemented.

[0041] In a fourth aspect, the present application provides a vehicle comprising the display device described in the second aspect or the computer-readable storage medium described in the third aspect.

[0042] Compared with the prior art, this application is divided into different levels according to whether the car is in a noisy environment, and the corresponding display mode is used at the corresponding level to display the required projection information, thereby enhancing the warning prompt capability in a noisy environment, ensuring that the user can find the warning information in the projection information in a timely manner, and not excessively interfering with the driver's driving behavior. This application can adapt to different environments and adopt flexible warning forms in the display area of ​​the HUD projection, thereby improving the warning capability for the driver and optimizing the user's viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the technical solution. Obviously, the drawings described below are only some examples recorded in the present application, and a person of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0044] Figure 1 Schematic diagram of HUD projection display in some examples of this application.

[0045] Figure 2 This is a schematic diagram of the microphone configuration on a vehicle in some examples of this application.

[0046] Figure 3 This is a schematic diagram of the alarm display strategy generation mechanism in some examples of this application.

[0047] Figure 4 This is a schematic diagram of the noise environment determination process in some examples of this application.

[0048] Figure 5 Schematic diagram of the display area of ​​HUD projection in some examples of this application.

[0049] Figure 6 Schematic diagram of the display area of ​​HUD projection in some examples of this application.

[0050] Figure 7 Schematic diagram of the display area of ​​HUD projection in some examples of this application.

[0051] Figure 8 Schematic diagram of the display area of ​​HUD projection in some examples of this application.

[0052] Fig. 9 Schematic diagram of the display area of ​​HUD projection in some examples of this application.

[0053] Fig.10 Schematic diagram of the display area of ​​HUD projection in some examples of this application.

[0054] Fig.11 This is a schematic diagram of the classification of the in-vehicle sound environment in some examples of this application.

[0055] Fig.12 Schematic diagram of alarm display arrangement in some examples of this application.

[0056] Fig.13 Schematic diagram of HUD display device module in some examples of this application.

[0057] Fig.14 This is a schematic diagram of the composition of the HUD display device in some examples of this application.

[0058] Fig.15 This is a schematic diagram of projection display in a vehicle in some examples of the present application. DETAILED DESCRIPTION

[0059] The present application will be described in detail below in conjunction with the accompanying drawings, but the content of the description is merely some examples recorded in the present application and does not limit the present application. Any changes in structure, method or function made by ordinary technicians in this field based on these examples are included in the protection scope of the present application.

[0060] It should be noted that the same reference numerals or marks may be used in different examples, but these do not represent an absolute connection in structure or function. In addition, the "first", "second", etc. mentioned in each example are only for the convenience of description, and do not represent an absolute distinction in structure or function, nor can they be understood as indicating or implying the relative importance or the number of corresponding objects. Unless otherwise specified, the "at least one" that may be involved in the description refers to one or more, and "more than one" refers to two or more.

[0061] In addition, when expressing a feature, the character " / " can indicate that there is an or relationship between the front and back associated objects. For example, head-up display / head-up display can be expressed as head-up display or head-up display. When expressing an operation, the character " / " can indicate that there is a division relationship between the front and back associated objects. For example, the magnification M=L / P can be expressed as L (virtual image size) divided by P (image source size). Moreover, the "and / or" in different examples is only to describe the association relationship between the front and back associated objects. This association relationship can include three situations. For example, a concave mirror and / or a convex mirror can be expressed as the existence of a concave mirror alone, the existence of a convex mirror alone, and the existence of both a concave mirror and a convex mirror.

[0062] HUD projection display mainly uses the optical reflection principle to reflect the imaging light to be displayed through a transparent surface into the viewer's eyes. The human eye can see the virtual image information in the opposite direction of the light. Correspondingly, the transparent surface can be the windshield of the vehicle, and the windshield can be used as a display screen to display the navigation instructions of the vehicle, the vehicle's driving speed, etc. Figure 1As shown, the HUD display device may include at least an optical machine 1, a first reflector 2, a second reflector 3, etc., wherein the optical machine 1 includes a backlight source and an image source (not shown), the backlight source is used to provide illumination light and adjust the brightness of the illumination light according to control, for example, the backlight source may be an LED (Light Emitting Diode), a laser, etc. Under the illumination light provided by the backlight source, the image source adjusts the corresponding display content according to control and projects the display light from the surface of the image source, for example, the image source may be an LCD (Liquid Crystal Display), a DMD (Digital Micromirror Devices), a MEMS (Micro-Electro-Mechanical System) micromirror, a LCOS (Liquid Crystal on Silicon), etc. The first reflector 2 and the second reflector 3 can project the display light projected by the optical machine 1 onto the windshield 4, so as to customize the optical path in a smaller space and meet different projection display requirements. The first reflector 2 and the second reflector 3 can be set as a concave mirror, a convex mirror, a concave lens, a convex lens, etc. according to the requirements of optical planning, and the surface shape of the lens can adopt a free-form surface. Optionally, at least one of the first reflector 2 and the second reflector 3 can also be adjusted to a certain degree of angle, so as to change the projection position of the display light on the windshield 4 to meet the needs of viewers of different heights. The display light of the optical machine 1 is finally reflected on the windshield 4 of the vehicle to form a virtual image 5. When the human eye 6 observes the virtual image 5 facing the windshield 4, it can feel a certain sense of depth, just like watching a real object at a specific distance outside the windshield. The virtual image 5 can be the navigation instruction content, vehicle speed, etc. as described above. It should be added that, according to the characteristics of different optical machines, the HUD display device can also be provided with a diffuser. In some examples, the HUD display device can also include Fresnel lenses, waveguide optical devices, diffractive optical devices, holographic optical devices, tapered optical fibers, etc.

[0063] As mentioned above, the HUD display device can be projected onto the windshield to form a corresponding display area (for details, please refer to Fig.15), since the display area is presented in the form of a virtual image focal plane, the human eye will perceive it as being in front of the vehicle, which is basically consistent with the field of vision of the driving vehicle. At the same time, the projected display area can also display projection information of different contents according to the configuration, just like the instrument and central control screen in the vehicle. In some examples, in addition to the above-mentioned navigation instructions, vehicle speed, etc., corresponding warning information can also be displayed in the display area. Since the display area is in front of the driver's field of vision when driving the vehicle, it has the advantage of being easier to notice than the instrument and central control screen, and the warning intensity for the warning information is stronger. Accordingly, the warning information configured to be displayed in the display area can include the warning content already displayed on the instrument and central control screen, such as the seat belt is not fastened, etc. By directly projecting the warning information displayed on the instrument and central control screen into the display area, the degree of attention of the driver can be increased. Optionally, the warning content that is only suitable for display in the projected display area can also be expanded to display, and the corresponding warning information can be coordinated with the real scene outside the vehicle to improve the intuitiveness of the warning. Furthermore, these warning information can be displayed at a specific location like the vehicle speed that is always displayed in the display area, and its distribution characteristics can refer to the display on the instrument and the central control screen. The warning information can also be displayed at the corresponding location according to the changes in the external environment, just like the navigation instructions that are enhanced in the display area, so as to achieve a virtual-real combination effect. Optionally, in order to increase the intensity of the warning, it can also be presented in the display area in a floating overlay manner on top of all the information, so that the driver's attention can be directed to the warning information to the maximum extent, which will be described in detail below.

[0064] During the driving process, there will be some anomalies that require the driver's attention. If these anomalies are not handled in time, accidents may occur. For example, if the driver fails to notice the horn of the adjacent vehicle in time and changes lanes forcibly, a vehicle collision will occur. Therefore, the vehicle needs to warn of the existing anomalies to remind the driver to pay attention to the existence of the anomalies and deal with them in time. Furthermore, due to the different transmission methods of warning information and the complex environment in the vehicle cabin, sometimes the driver cannot perceive the warning information in time. At this time, it is necessary to increase the warning intensity. At the same time, being in a high warning intensity display mode for a long time will not only make the driver insensitive to the display content, but also increase the driver's fatigue. Therefore, it is necessary to adaptively adjust the configuration of the HUD projection in the display area to improve the display flexibility of the projection information.

[0065] In some examples, such as Figure 2As shown, for a vehicle, a microphone B1 can be set in the vehicle, and the microphone B1 can be specifically set on the center console near the driver to collect the sound decibel situation near the driver. Specifically, according to the impact of sound intensity on humans, a sound decibel range of 30 to 40 decibels represents a relatively quiet normal environment, and the driver can basically perceive the surrounding changes keenly and make accurate decisions. If the sound decibel exceeds 50 decibels, it will have a certain impact on the driver's activities, and may even ignore some external warnings. Further, reaching more than 70 decibels will affect the driver's reaction efficiency and even cause the driver to have a driving accident. If the driver is in a noise environment of more than 90 decibels for a long time, it will seriously affect the driver's hearing, that is, it is difficult for the driver to distinguish other sounds in the environment. Accordingly, the sounds emitted in the vehicle's cabin can be roughly divided into two categories. One is the sound output by the vehicle's audio system, which is further divided into entertainment audio sounds such as music and broadcasting, and warning sounds such as fault warnings and safety reminders emitted by cabin equipment. For entertainment audio sounds, the corresponding decibels can be lowered through control, while the volume of warning sounds cannot be lowered for safety reasons and has a higher priority. If the user does not pay attention, measures must be taken to increase the intensity of the warning. The other category is the vibration sound caused by the operation of the engine and other vehicles when the vehicle is driving, and the speech sound emitted by passengers in the cabin. For the sound of the engine running, this is an inherent vibration volume and is basically unavoidable, while the sound emitted by passengers in the cabin cannot be predicted and controlled by the HUD display device, so it needs to be processed differently, which will be described in detail below. Accordingly, microphone B1 can collect the volume near the driver, including the sum of the above two types of sounds, can determine the noise environment in which the driver is located, and can also reduce the volume of some components to control the level of the noise environment. In some examples, multiple microphones can also be set on the outside of the vehicle, such as fixed on the outer shell of the vehicle, such as Figure 2 As shown, microphone B2 can be set on the left side of the vehicle, microphone B3 can be set on the rear side of the vehicle, and microphone B4 can be set on the right side of the vehicle. Specifically, the source direction of the sound can be determined according to the volume of the sound collected by different microphones. For example, the horn sound of the vehicle on the left will be collected by microphone B2 at the loudest volume, so it can be determined that there is a horn vehicle on the left. In some examples, not only can the sound source be obtained through microphones B2, B3, and B4, but the type of horn sound can also be determined according to the sound frequency, voiceprint features, etc., such as the horn sound of an ordinary car, the alarm sound of a special vehicle, etc. Optionally, the number of microphones inside and outside the vehicle can be set more as needed, and their positions can also be adjusted according to the collection effect.

[0066] In some examples, such as Figure 3As shown, when the HUD display device needs to display corresponding warning information in the projected display area to remind the user to pay attention to the corresponding abnormality, the specific warning content is first obtained, including the warning content obtained by the cockpit equipment according to the sensors of the vehicle body, such as the door is not closed, the seat belt is not fastened, and other safety operation warnings are obtained through the sensors on the door and seat, the tire pressure alarm, the oil alarm, and other fault alarms are obtained through the fault monitoring of the vehicle body, and the traffic violation warnings such as vehicle speeding can also be obtained through relevant sensors, positioning modules, etc. The warning information corresponding to these contents is displayed on the original cockpit equipment such as the instrument and the central control screen by default, but in this example, considering that the driver will be affected by the noise in the cockpit and cannot notice it in time, it can be displayed in a specific display mode in the display area of ​​the HUD projection according to the situation to improve the driver's attention. Further, the type of warning information also includes the warning content such as the whistle sound outside the car obtained by the microphone outside the car. These external security threats also need to attract the attention of the driver, such as the whistle reminder of the left vehicle, the whistle reminder of the right vehicle, and the whistle reminder of the rear vehicle. At the same time, when the HUD display device receives these warning contents, it is also necessary to judge the noise environment in the cockpit, that is, the sound decibel near the driver, and determine whether to display the warning information in the display area and in what display mode the warning information is displayed according to the level of the noise environment. As mentioned above, the microphone in the car can obtain the sound decibel in the car, which can be specifically compared with the preset first threshold, such as 60 decibels. If the detected sound decibel is greater than the first threshold, it is determined that the car is in a noisy environment, indicating that it is easy to cause the driver to be distracted and unable to pay attention to the possible warning prompts. If the detected sound decibel is less than the first threshold, it is determined that the car is not in a noisy environment, indicating that the driver has a certain degree of intervention ability for the warning prompts. Optionally, more noise environment levels can be set according to the different sections where the sound is located, and more detailed warning intensity processing can be adopted for different noise environment levels. In more examples, the determination of the noise environment can be inferred by the car audio that directly outputs the sound. As mentioned above, the second type of sound other than the car audio is relatively stable, and the large fluctuations in the noise environment are mainly caused by the output of the car audio, so it can be indirectly determined according to the output power of the car audio.

[0067] In some examples, when it is determined that the vehicle is not in a noisy environment, the HUD display device uses the normal mode to implement projection display, and when it is determined that the vehicle is in a noisy environment, the HUD display device will use the warning mode to implement projection display. Different HUD warning display strategies will be formed accordingly for different display modes, mainly to distinguish the warning information in the projection information. Figure 4As shown, in order to switch between the normal mode and the warning mode more smoothly, when determining the level of the noise environment in the car, the microphone in the car will be used for cyclic detection. When the detected sound decibel is less than the first threshold, it is determined that the car is not in a noisy environment. At this time, the HUD display device will use the normal mode to display the projection information. When the detected sound decibel exceeds the first threshold, in this example, it is not directly determined that the car is in a noisy environment, because there may be a short-term sound mutation, which has a relatively small impact on the degree of driver intervention. At this time, the HUD display device will not immediately switch from the normal mode to the warning mode, but reduce the frequency of switching between the two. It will only prompt that the sound is louder in the projected display area, such as directly displaying the corresponding decibel number in the car, and using the control volume prompt displayed in the display area to guide the driver to find a way to lower the sound, such as lowering the playback volume of the entertainment audio, or reminding the passengers in the car to communicate in a low voice. If the person in the car controls the sound in the car according to the control volume prompt, it will be reflected through the detection of the microphone in the car. Accordingly, after adjusting the sound decibel to be less than the first threshold, it will still be determined that the car is not in a noisy environment. Furthermore, during the duration of the prompt to control the volume, the person in the car did not respond to the prompt to reduce the volume or the operation to achieve volume control did not meet the conditions, that is, after the detection of the microphone in the car, the sound decibel still exceeded the first threshold, which means that the driver could not properly handle the warning reminder to a large extent. Correspondingly, when the duration of the prompt also exceeds the second threshold, that is, the detected sound is always above the first threshold and reaches the duration specified by the second threshold, it will be determined that the car is in a noisy environment, and the projection display will also take into account the distraction of the noise environment to the driver, and use a warning mode with a higher warning intensity to emphasize the existing warning content. After determining that the car is in a noisy environment, the microphone in the car will continue to detect the decibel range of the sound in the car in a cycle. When the sound decibel is lower than the first threshold, it will be re-determined that the car is not in a noisy environment. Optionally, before switching from a noisy environment to a non-noisy environment, a duration threshold can also be set. Only when the sound decibel drops from above the first threshold to below the first threshold for a specific length of time, it will be re-determined that the car is not in a noisy environment to avoid the unstable state caused by sudden sound fluctuations.

[0068] In some examples, warning information from the vehicle itself (first warning type), such as fault warnings, is displayed only on the instrument panel in the cockpit by default, that is, the display area for the HUD projection. In normal mode, fault warning information is not displayed, which reduces unnecessary visual interference to the driver and relieves the fatigue burden on the driver. Figure 5As shown, when it is determined through the in-car microphone that the car is in a noisy environment, as the projection display switches from normal mode to warning mode, the fault warning display element 51 is projected at a specified position in the display area 50 to increase the warning intensity and prevent the driver from ignoring relevant reminder information due to internal sound interference, such as warning information on the instrument or directly issued warning sounds. In this example, the display element 51 is displayed in the display area 50 in an embedded manner, that is, it can be understood as being rendered in the same layer as other normally displayed display elements (such as vehicle speed, gear information, etc.), and its display size is basically the same as the size of the display element representing the gear information, and can be rendered at a specified pit position according to certain element arrangement rules. As shown Figure 6 As shown, in an optional example, when the display element 51 containing the warning information is configured in the display area in the warning mode, it will also be enlarged and displayed in the middle position according to the order of priority, and the vehicle speed information previously displayed in the middle position will be rearranged to the left position, which can further increase the driver's chance of observing. In some examples, the warning information of the first warning type is displayed synchronously with the instrument, central control screen, etc. in the normal mode, which can be referred to Figure 5 The size of the projection information can be consistent with other normal display. Compared with the normal mode, when switching to the warning mode, the warning information in the projection information will be displayed in the display area in a display mode with a higher warning intensity. For example, you can refer to Figure 6 That is, for the projection information of the same alarm content, it is displayed in the first output state in the alarm mode and in the second output state in the normal mode. The first output state is different from the second output state, and the warning intensity presented by the first output state is higher than the warning intensity presented by the second output state. For example, the conspicuousness of the first output state is increased by enlarging the size and adjusting it to a more noticeable position. In more examples, the first output state grabs the attention of other display elements by layer overlay relative to the second output state, such as Figure 7 As shown, the display element 51 is displayed in a suspended manner above the layer where the vehicle speed information, gear information, speed limit information, etc. are located, so as to cover at least part of the projection information that is always displayed, so that the driver can easily view the warning information in an emergency state.

[0069] In some examples, for warning information from outside the vehicle (second warning type), such as the horns of surrounding vehicles, if the driver is solely relied on to identify them while sitting in the car, on the one hand, the vehicle shell and windshield will attenuate the volume of some sounds, and on the other hand, the noise environment inside the car will also mask the sounds coming from the outside. This will sometimes cause the driver to fail to perceive the external warning reminders in time, and even make slow driving decisions. Figure 2The microphones B2, B3, B4, etc. can accurately capture external warning reminders, and these captured warning reminders will be presented to the driver with a higher warning intensity through conversion, that is, they will attract the driver's attention more than the original whistle sound transmitted into the cockpit. Figure 8 As shown, in response to the horn of an external vehicle, taking the vehicle located at the left rear as an example, the vehicle at the left rear is preparing to overtake from the left, and it honks to remind the front vehicle not to change lanes to the left. Due to the direction of the horn of the left rear vehicle, the microphones B2, B3, and B4 of the front vehicle (see Figure 2 ) The volume of the sound received is different, so it can be determined as a horn sound from the left rear vehicle based on the corresponding sound space propagation model. At this time, in order to remind the driver, a display element 52 indicating the horn sound can be projected in the lower left corner of the display area 50. The position of the display element 52 corresponds to the direction of the horn sound, that is, the left hand side of the driver facing the display area. Similarly, if it is determined that there is a horn sound from the right rear vehicle, a display element indicating the horn sound can be projected in the lower right corner of the display area 50. In this way, the driver can judge the horn situation of the external vehicle through the warning information in the display area. Fig. 9 As shown, when the external microphone detects the horn sounds of vehicles in multiple directions outside, it can support the display of display elements 52 corresponding to the alarm information at multiple corresponding positions in the display area 50 at the same time, indicating that there are vehicle horn reminders in multiple directions outside. In more examples, in addition to displaying the alarm information of external vehicle horns in the display area, the warning intensity is also increased by the vehicle audio, such as broadcasting the alarm prompt tone containing the content of the external vehicle horn through the vehicle audio. Specifically, the alarm prompt tone is amplified and played on the vehicle audio after a specific conversion of the horn sound collected by the microphone outside the vehicle. Optionally, the external environmental background sound other than the vehicle horn sound will be filtered out during the conversion process to achieve corresponding sharpening, that is, the driver can directly hear the sound consistent with the external vehicle horn sound through the vehicle audio, and it is clearer. Preferably, when reproducing the horn sound of an external vehicle, the vehicle audio system will also use audio speakers at different locations to mix and render the sound. For example, the first vehicle audio system located on the left side of the vehicle cooperates with the second vehicle audio system located on the right side of the vehicle. It can include mixed outputs of different volumes, frequencies, etc. Based on the spatialized sound propagation characteristics, the direction of the sound perceived by the human ear is consistent with the direction of the external vehicle, providing a real warning reminder experience and making up for the defect that the original horn sound cannot be recognized in time due to attenuation. Optionally, multiple output forms such as seat vibration can be combined to attract the driver's attention and strengthen the warning intensity.

[0070] As described above, the warning information of the second warning type is displayed in the projected display area. The premise of its establishment is to make up for the driver's inability to accurately identify it in the actual driving environment. If the actual environment can ensure that the driver can judge the existence of external vehicles honking and other warning reminders, the corresponding warning information displayed in the display area will become redundant, which will increase the viewer's information burden and increase the driver's fatigue. Therefore, the warning information of the second warning type can also be classified and displayed according to the normal mode and the warning mode, respectively, and different forms can be allocated in different display modes according to the different warning intensities in the above examples, so that the warning intensity is higher in the warning mode, while the information burden of the driver is further reduced in the normal mode. In some examples, because the interior of the car is relatively quiet in normal mode, the driver can normally hear the external horn sound, and accordingly, it can be not displayed in the display area. Figure 8 , Fig. 9 The display element 52 shown, that is, the display area only displays some projection information that is always displayed, etc., and does not involve the warning information of the second warning type. When switching from the normal mode to the warning mode, if there is a horn sound from the outside, etc., it will refer to Figure 8 , Fig. 9 In the example, the display element 52 is projected at the corresponding position, that is, the first output state corresponding to the alarm mode displays the alarm information of the horn reminder, and the second output state corresponding to the normal mode hides the alarm information of the horn reminder, showing that the first output state is more eye-catching than the second output state. Figure 8 , Fig. 9 The display of the display element 52 in the middle belongs to the second output state, that is, in the normal mode, it is displayed in response to the horn of the external vehicle, but the warning intensity is relatively low, while in the warning mode, it is displayed with a higher warning intensity. The first output state of its warning information can include not only Figure 8 , Fig. 9 The display element 52 in Fig.10 As shown, a display element 53 is added on the basis of the second output state. In this example, the display element 53 is displayed in a floating manner in the display area 50. The layer where the display element 53 is located is above the layer where the display element 52 and the vehicle speed information, gear information, speed limit information, etc. are located. The display element 52 also partially covers the vehicle speed information, gear information, speed limit information, etc. Furthermore, the first output state also has the function of reproducing the external vehicle horn sound by the vehicle audio system (refer to the above example) relative to the second output state. Optionally, along with the sound output of the vehicle audio system, the display element 53 can also be displayed in a flashing manner to further improve the driver's attention to the warning information.

[0071] In some examples, for the second alarm type, two levels are further subdivided in the alarm mode to adopt different warning intensities, that is, in addition to the first output state, a third output state is also included, and the third output state is more eye-catching than the first output state. For example, in the normal mode, the second output state of the alarm information can be to hide the alarm information related to the vehicle horn. In the alarm mode, the first output state of the alarm information adopts Figure 8 , Fig. 9 The display element 52 in the example, and the third output state of the warning information adopts Fig.10 The display elements 52 and 53 in the example make the warning intensity increase step by step. Optionally, the horn sound of the external vehicle can be reproduced in combination with the vehicle audio. The switching between the first output state and the third output state is determined according to the road condition of the vehicle. That is, when the vehicle is in a noisy environment, if the road condition outside the vehicle is also complicated, the third output state with a higher warning intensity should be used to present the corresponding warning information to the driver, so as to remind the driver to make accurate and timely driving decisions and avoid unnecessary traffic accidents. Specifically, the road condition outside the vehicle can also be determined with the help of a microphone outside the vehicle. For example, when the number of honking vehicles collected by the external microphone exceeds the third threshold and / or a continuous honking sound is detected (exceeding a specific duration), it is determined that the road condition is relatively complicated, indicating that there are many vehicles driving outside the vehicle, and the driver needs to pay more attention to the existing warning information. In more examples, whether the road condition outside the vehicle is complicated can also be judged based on the vehicle-mounted camera, radar, etc. The vehicle-mounted camera determines by shooting the external real scene and performing image analysis, and the radar determines by determining the shape of the external vehicle.

[0072] In some examples, the priority of the first alarm type is set higher than that of the second alarm type. Therefore, when the alarm is prompted, the warning intensity of the first alarm type may also be higher than that of the second alarm type. A differentiated alarm display strategy is used for control, that is, the first output state and the second output state corresponding to the two types of alarm information may also be different. Even when there is a conflict between the two, the alarm information of the first alarm type is given priority to be presented to the driver to improve driving safety. Furthermore, it is necessary to distinguish the alarm sound corresponding to the first alarm type in the car from the entertainment audio sound played by the car audio system, so that the priority of the first alarm type and the second alarm type are higher than the playback priority of the entertainment audio, that is, the priority of the first alarm type is higher than the priority of the second alarm type, and the priority of the second alarm type is higher than the playback priority of the entertainment audio. Fig.11As shown, the sound environment of the noise inside the car mainly includes entertainment audio sounds such as music and broadcasting, the sound of passengers talking, mechanical vibration sounds of vehicles such as tire noise and air friction, and external vehicle horns, etc., and even when there is the first type of alarm type, it also includes the alarm sound emitted by the cockpit, and some of these sounds cannot be actively controlled, and some sounds need to be not only retained but also set to the highest priority due to regulations and safety requirements, such as cockpit alarm sounds and vehicle horns. They are uncontrollable, but they are also sounds that need to be reserved with medium priority for drivers to judge the external vehicle situation. Therefore, the low-priority entertainment audio sound can be actively controlled, because its priority is lower than the above two types of alarm information, and reducing or shutting down will not bring hidden dangers to safety. Accordingly, when it is determined that the car is in a noisy environment, in addition to passively increasing the warning intensity of the alarm information, the sound environment inside the car will also be actively adjusted, such as temporarily reducing the output volume of the entertainment audio sound or shutting down the playback of specific music, and when the corresponding alarm type disappears or switches from the alarm mode to the normal mode, the original state of the entertainment audio sound is automatically restored to ensure the user experience.

[0073] In some examples, such as Fig.12As shown, in the warning mode, the first output state not only projects the warning information in a specific form in the projected display area, but also actively reduces the output volume of the entertainment audio sound or turns off the playback of specific music. Specifically, for the first warning type, such as the seat belt is not fastened, it is only displayed on the original instrument in the normal mode, and when the sound environment in the car becomes noisy, it switches to the warning mode. In this example, since the first warning type belongs to the highest priority, the sound does not distinguish between the first output state and the third output state, but uniformly uses a relatively high warning intensity for reminder. Specifically, in addition to projecting the warning information of the corresponding mark in the display area, the volume of the entertainment audio sound is also controlled. Optionally, the reduction in the volume of the entertainment audio sound causes the detected decibel of the sound in the car to be lower than the first threshold, which will not trigger the switch from the warning mode back to the normal mode. When the situation of the first warning type disappears, the warning presentation form of the first output state and / or the third output state will also disappear temporarily, and the display element corresponding to the warning information will not be displayed in the corresponding display area, and the entertainment audio sound will also be restored to the original volume until the first warning type appears again, and the first output state and / or the third output state are called again. For the second alarm type, since it has a lower priority than the first alarm type, the corresponding alarm information may not be displayed in normal mode. In the alarm mode, the first output state will present the display element corresponding to the alarm information projected in the display area without additional control of the vehicle audio. The third output state responds to the situation that the vehicle is in complex road conditions. While projecting the display element corresponding to the alarm information, it will also temporarily control the volume of the entertainment audio sound to reduce the interference of the entertainment audio sound to the driver. Similarly, when the situation of the second alarm type disappears, the first output state and the third output state will also be cancelled, and the volume adjustment of the vehicle audio by the third output state will also be restored. It should be noted that the specific configuration content of the second output state, the first output state and the third output state arranged from low to high according to the warning intensity is not limited to the above examples, and can also be reconfigured in combination with the reproduction of external horn sounds through the vehicle audio, such as playing the processed external vehicle horn sound through the vehicle audio while reducing the volume of the entertainment audio, so that the horn sound of the external vehicle can be clearly presented in the car. Accordingly, under the premise of responding to the sound environment inside the car, the warning combination corresponding to the warning intensity is configured. It is only necessary to ensure that the order of warning intensities corresponding to different output states is consistent, thereby ensuring that the driver can still recognize the warning prompts in more complex situations.

[0074] When the HUD display device implementing the warning display method in the above example is applied to a vehicle, it can provide appropriate warning information during the driving process of the vehicle, without excessive information display interfering with the driver's attention, and can also ensure that the warning information can be delivered to the driver in a timely and accurate manner. Fig.13As shown, the HUD display device integrated in the vehicle can be powered and data provided by the vehicle computer 92, or the HUD display device itself can provide power and generate data. Optionally, the HUD display device can also obtain cockpit-related warning content through the vehicle computer 92, and control the vehicle audio controlled by the vehicle computer 92. The HUD display device may specifically include a processor 91, an Ethernet interface 901, a CAN (Controller Area Network) interface 902, a power management module 903, a running memory 904, a storage memory 905, a temperature detection 906, a motor 907, a backlight source 908, an image source 909, a positioning module 910, a radar 911, a camera 912, etc. It should be noted that Fig.13 The modules listed in the description are merely exemplary and do not constitute any limitation. In some examples, the HUD display device may further include other modules. In addition, the above modules may be implemented in one or more hardware in different examples, or a single module may be implemented by a combination of multiple hardware.

[0075] The processor 91 serves as the control center of the HUD display device, and includes one or more processing units of any type, including but not limited to a microcontroller, a microcontroller, a DSP (Digital Signal Processor) or any combination thereof. The processor 91 is used to generate operation control signals according to a computer program, realize the control of other modules, and cooperate with corresponding modules to process the acquired or inherent data, instructions, etc.

[0076] The Ethernet interface 901 is a network data connection port for local area network communication, which defines a series of software and hardware standards. Multiple electronic devices can be connected together through the Ethernet interface 901. In this example, the processor 91 can exchange information with the vehicle computer 92 through the Ethernet interface 901, such as sending data to the vehicle computer 92 or receiving data sent by the vehicle computer 92.

[0077] The CAN interface 902 is a network data connection port of the controller area network, which provides a standard bus for the control system and embedded industrial control inside the car, and realizes the communication interaction between the control nodes. In this example, the processor 91 can also exchange information with the vehicle computer 92 through the CAN interface 902. Optionally, the processor 91 can also connect to other external devices through the CAN interface 902. In some examples, the processor 91 can also be provided with a GPIO (General-purpose input / output) interface to improve the compatibility of peripheral connections.

[0078] The power management module 903 is connected to the vehicle computer 92 and can receive the power provided by the vehicle computer 92 to provide a regulated power supply for each module of the HUD display device, thereby ensuring that the processor 91 and each module operate under normal voltage supply and avoid damage due to overvoltage.

[0079] The running memory 904 is used to store computer programs executed by the processor 91, temporarily stored calculation data, data exchanged with the storage memory, etc. The running memory 904 can be a memory such as SDRAM (Synchronous Dynamic Random-access Memory).

[0080] The storage memory 905 is used to store resources such as display content related to the HUD display device, and long-term storage of running programs and data, etc. The storage memory 905 can be a memory such as Flash (flash memory). In some examples, the processor 91 can also provide an interface to access an external memory.

[0081] Temperature detection 906 is used to detect the temperature inside the HUD display device, and may specifically include several temperature sensors. Since the resistance value of the temperature sensor changes with the change of temperature, the processor 91 can determine the resistance value of the temperature sensor at the corresponding temperature according to the voltage change between each temperature sensor and the voltage divider resistor under a fixed power supply voltage, thereby reversely deducing the temperature at the location of the temperature sensor. In some examples, the processor 91 can control several temperature sensors through the GPIO interface, and several temperature sensors can be set at different locations inside the HUD display device. The processor 91 can use time-sharing detection to obtain the temperature values ​​fed back by several temperature sensors respectively.

[0082] Motor 907 is used to drive the optical lens in the HUD display device to rotate under the control of processor 91, so as to achieve the change of the corresponding optical path. For example, when the backflow of sunlight causes the temperature rise on the surface of the image source, the motor can be used to drive the optical lens to prevent the external sunlight from reaching the surface of the image source. In some examples, the processor 91 can also drive the fan provided on the HUD display device through motor 907 to increase the speed of air exchange between the inside and outside of the HUD display device to achieve heat dissipation. Specifically, the motor 907 is connected to the processor 91 through a motor driver chip, and the motor driver chip provides high-performance power output for the motor 907, and can also communicate and control with the processor 91 through interfaces such as SPI (Serial Peripheral Interface).

[0083] The backlight source 908 is used to provide illumination light and adjust the brightness of the illumination light according to the control of the processor 91, so as to adjust the projection display brightness of the entire HUD display device. The backlight source 908 cooperates with the image source 909 to realize the main function of optical machine projection display. The backlight source 908 can be an LED (Light Emitting Diode), a laser, etc. Specifically, the backlight source 908 is connected to the processor 91 through a backlight driver chip, and the backlight driver chip provides a driving voltage for the backlight source 908 and controls the brightness of the backlight source 908 under the pulse width signal output by the processor 91.

[0084] The image source 909 is used to display an image of corresponding content and project the display light corresponding to the image according to the control of the processor 91. The image source 909 can be an LCD (Liquid Crystal Display), a DMD (Digital Micromirror Devices), a MEMS (Micro-Electro-Mechanical System) micromirror, a LCOS (Liquid Crystal on silicon), etc.

[0085] The positioning module 910 is used to monitor the position of the HUD display device and the corresponding vehicle. The positioning module 910 can be a global navigation satellite system such as GPS (Global Positioning System) and Beidou Satellite Navigation System. By measuring the distance between the satellite and the receiver on the positioning module 910 at different positions, the corresponding position and orientation data are determined. In some examples, the positioning module 910 may also include an inertial navigation system, which is based on Newton's laws of mechanics. By measuring the acceleration of the positioning module 910 in the inertial reference system, integrating it over time, and transforming it into the navigation coordinate system, the speed, yaw angle, and position data in the navigation coordinate system are obtained. Optionally, the inertial navigation system can assist the global navigation satellite system to achieve more accurate positioning and provide the processor 91 with corresponding position information.

[0086] The radar 911 is used to determine the position of a target object through electromagnetic waves, and can usually determine the distance of the target object from the vehicle where the radar 911 is located.

[0087] Camera 912 includes a vehicle body camera and an in-vehicle camera, wherein the vehicle body camera is used to determine the position of the target object through visual recognition, and the vehicle body camera can be a monocular camera or a binocular camera. The biggest difference between a monocular camera and a binocular camera is that a binocular camera can capture images from two different perspectives, thereby obtaining distance information in three-dimensional space. The in-vehicle camera is used to identify the behavior status of the driver and passengers in the vehicle, including fatigue detection, distraction detection, expression recognition, gesture recognition, sight tracking, etc. In this example, the in-vehicle camera can also implement eye tracking.

[0088] In some examples, the positioning module 910, radar 911 and camera 912 can also be directly connected to the vehicle computer 92, and are not directly connected to the processor 91 of the HUD display device. For example, the vehicle computer 92 itself is integrated with a positioning module for position tracking and a radar and camera for automatic driving. The HUD display device can obtain the collected data of the positioning module, radar and camera in real time through communication with the vehicle computer 92.

[0089] like Fig.14 As shown, the HUD display device that implements the above-mentioned example warning display method may specifically include a processor 931, a memory 932, an input device 933 and an output device 934, wherein the input device 933 may include an operation button integrated on the display device, etc., and the display device may receive input control instructions and data through the input device 933. The output device 934 may include an image source integrated on the display device, etc., and the display device may output corresponding instructions or data to the output device 934. Further, the memory 932 stores a computer program running on the processor 931, and the processor 931 implements the above-mentioned example warning display method when executing the computer program. In some examples, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above-mentioned example warning display method when executed by the processor.

[0090] like Fig.15As shown, the vehicle can be provided with the above-mentioned HUD display device. Specifically, the HUD display device is integrated inside the center console 10, such as in front of the steering wheel. The corresponding display light is projected onto the opposite vehicle windshield 4 through the projection window 102 of the HUD display device. The effect of the viewer observing the windshield 4 from the cockpit is that the corresponding virtual image can be directly seen. Specifically, the corresponding display area 50 of the windshield 4 includes basic display information (vehicle speed information, gear information, etc.) and extended display information (navigation information, etc.) and other display elements. More importantly, warning information can also be displayed on demand, and the driver can view the corresponding content without lowering his head while driving, which improves safety, especially driving the driver to promptly discover the abnormal situation corresponding to the warning information. In some examples, the vehicle can also distribute the program of the warning display method in the above example through the above-mentioned computer-readable storage medium, so that the vehicle-mounted HUD display device can be conveniently updated and upgraded. It should be noted that the above-mentioned transportation vehicles are not limited to cars as means of transportation, but may also include buses, trucks, excavators, motorcycles, trains, high-speed trains, ships, yachts, airplanes, spacecraft, etc. The projected windshield is not limited to the front windshield of a car, but may also be a transparent surface at other locations.

[0091] In combination with the above examples, the technical solutions involved in the present application can be directly embodied as hardware, a software module executed by a control unit, or a combination of the two, that is, one or more steps and / or one or more step combinations, which can correspond to various software modules of a computer program flow, or to various hardware modules, such as ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof. For the convenience of description, the above description is divided into various modules and described separately according to their functions. Of course, when implementing the present application, the functions of each module can be implemented in the same or more software and / or hardware.

[0092] Through the description of the above examples, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution involved in the present application can be essentially or partly contributed to the prior art in the form of a software product. The software is executed by a microcontroller unit and, depending on the required configuration, may include one or more microcontroller units of any type, including but not limited to a microcontroller unit, a microcontroller, a DSP (Digital Signal Processor) or any combination thereof. The software is stored in a memory, such as a volatile memory (such as a random access memory, etc.), a non-volatile memory (such as a read-only memory, a flash memory, etc.) or any combination thereof.

[0093] In summary, this application is divided into different levels according to whether the car is in a noisy environment, and the corresponding display mode is used at the corresponding level to display the required projection information, strengthen the warning prompt capability in a noisy environment, and ensure that the user can find the warning information in the projection information in a timely manner without excessively interfering with the driver's driving behavior. This application can adapt to different environments and adopt flexible warning forms in the display area of ​​the HUD projection, improve the warning capability for the driver, and optimize the user's viewing experience.

[0094] It should be understood that although this specification includes some examples, none of these examples contains only one independent technical solution, and this description of the specification is only for the purpose of clarity. A person skilled in the art should take the specification as a whole, and the technical solutions in each example can also be appropriately combined to form other implementation methods that can be understood by a person skilled in the art.

[0095] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. All equivalent implementation methods or modifications that do not deviate from the teachings of the present application should be included in the scope of protection of the present application.

Claims

1. A warning display method, characterized in that: include: The display device projects a display area on the front windshield of the vehicle; In response to the vehicle being in a noisy environment, the display area is configured to display the projection information in a normal mode; In response to the vehicle being in a noisy environment, the display area is configured to display projection information in a warning mode; In the warning mode, the projection information includes warning information in a first output state, and the first output state is a display state excluded from the normal mode.

2. The alarm display method according to claim 1, characterized in that: The noisy sound environment is determined based on a microphone in the vehicle.

3. The alarm display method according to claim 1, characterized in that: The warning information is a first warning type from the vehicle itself or a second warning type from outside the vehicle.

4. The alarm display method according to claim 1, characterized in that: The first output state also includes reducing the playback volume of entertainment audio in the vehicle.

5. The alarm display method according to claim 1, characterized in that: The alarm display method further includes: In the normal mode, the projection information includes warning information in a second output state, and the first output state is more eye-catching than the second output state.

6. The alarm display method according to claim 1, characterized in that: In the alarm mode, the projection information includes the alarm information in the first output state, including: The warning information is of the second warning type; In response to the vehicle being in a complex road condition, the warning information in the first output state is switched to a third output state, and the third output state is more eye-catching than the first output state.

7. The alarm display method according to claim 1, characterized in that: The noisy environment in the vehicle includes: In response to the decibel level of the sound in the vehicle exceeding a first threshold, prompting a control volume in the display area; The duration of the volume control prompt in the display area reaches the second threshold, and the decibel of the sound inside the car still exceeds the first threshold, and it is determined that the car is in a noisy environment.

8. A display device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of the alarm display method according to any one of claims 1 to 7 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the alarm display method according to any one of claims 1 to 7 are implemented.

10. A means of transport, characterized in that: Includes the display device of claim 8 or the computer-readable storage medium of claim 9.

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