Head-up display method, device and system based on vision

Abstract

The invention discloses a vision-based head-up display method, device and system. The method comprises the following steps: displaying an HUD picture with a plurality of display areas; road information and driving information of the vehicle are obtained, at least one display area is determined to serve as a first display area according to the road information and the driving information, and the display areas except the first display area serve as a second display area; acquiring a face image of the main driver, adjusting the first display area and the second display area according to the face image, and taking the adjusted first display area as a target display area; determining brightness adjustment information of the target display area, and turning down the display brightness of the target display area according to the brightness adjustment information; wherein the relevancy between the content displayed in the first display area and the road information and the driving information is greater than the relevancy between the second display area and the road information and the driving information. According to the technical scheme, the HUD picture information acquisition efficiency of a main driver can be improved.

Description

Technical Field

[0001] The present invention relates to the field of head-up display technology, and in particular to a vision-based head-up display method, device and system. Background Art

[0002] HUD (Head-Up Display) technology is a display system that projects key information directly onto a transparent medium in front of the user's line of sight, aiming to reduce the frequency of drivers looking down at instruments or screens and improve operational safety and efficiency.

[0003] However, the current HUD technology displays too many types of data, which is not conducive to the driver's reasonable and effective acquisition of the data displayed by the HUD technology. Summary of the invention

[0004] The main purpose of the present invention is to provide a vision-based head-up display method, which aims to solve the problem that the current HUD display technology displays too much content, resulting in low efficiency in the main driver obtaining information.

[0005] To achieve the above object, the present invention proposes a vision-based head-up display method, which includes:

[0006] Displaying a HUD screen with multiple display areas;

[0007] Acquire road information and driving information of the vehicle, and determine at least one display area as a first display area according to the road information and the driving information, and use a display area other than the first display area as a second display area;

[0008] Acquire a facial image of the driver, adjust the first display area and the second display area according to the facial image, and use the adjusted first display area as the target display area;

[0009] Determine brightness adjustment information of the target display area, and lower the display brightness of the target display area according to the brightness adjustment information;

[0010] The relevance of the content displayed in the first display area to the road information and the driving information is greater than the relevance of the content displayed in the second display area to the road information and the driving information.

[0011] Optionally, determining at least one display area as the first display area according to the road information and the driving information includes:

[0012] Determine whether the vehicle is in a special driving state based on road information and driving information;

[0013] If the vehicle is in a special driving state, at least one display area among the multiple display areas is determined as the first display area according to the special driving state of the vehicle, and at least one display area among the first display areas corresponding to each special driving state is different.

[0014] Optionally, the special driving state includes: a complex driving state, a difficult driving state, and a simple driving state;

[0015] The multiple display areas include: a driving information display area, a navigation guidance display area, an auxiliary function display area, a vehicle status display area, a prompt and warning display area, and an interconnection extension display area.

[0016] Optionally, according to the special driving state of the vehicle, determining at least one display area among the multiple display areas as the first display area includes:

[0017] If it is determined that the vehicle is in a complex driving state, the driving information display area, the navigation guidance display area, the vehicle status display area, and the interconnection extension display area are used as the first display area;

[0018] If it is determined that the vehicle is in a difficult driving state, the driving information display area and the interconnection extended display area are used as the first display area;

[0019] If it is determined that the vehicle is in a simple driving state, the auxiliary function display area and the prompt warning display area are used as the first display area.

[0020] Optionally, the method further comprises:

[0021] If the vehicle is in a normal driving state, the display brightness of the driving information display area, the navigation guidance display area, the auxiliary function display area, the vehicle status display area, the prompt and warning display area, and the interconnection extension display area is controlled to a first preset display brightness.

[0022] Optionally, determining brightness adjustment information of the target display area includes:

[0023] According to the special driving status, the brightness adjustment information of the target display area is determined.

[0024] Optionally, according to a special driving state, brightness adjustment information of a target display area is determined, including:

[0025] If it is determined that the vehicle is in a complex driving state or a simple driving state, adjusting the display brightness of the target display area to a second preset display brightness;

[0026] If it is determined that the vehicle is in a difficult driving state, adjusting the display brightness of the target display area to a third preset display brightness;

[0027] The second preset display brightness is greater than 0 and lower than the third preset display brightness, and the third preset display brightness is lower than the first preset display brightness.

[0028] Optionally, adjusting the first display area and the second display area according to the facial image, and using the adjusted first display area as the target display area, includes:

[0029] Determine the sight focus point of the main driver according to the facial image;

[0030] Determining whether there is a first display area that meets a preset condition;

[0031] If so, the first display area that meets the preset condition is cancelled as the first display area;

[0032] Among them, satisfying the preset conditions is: the duration of the sight focus point's stay reaches a preset duration and / or the frequency of the sight focus point's stay reaches a preset frequency.

[0033] The present invention further provides a display device, comprising:

[0034] Memory;

[0035] processor; and,

[0036] A vision-based head-up display program stored in the memory and executed by the processor, wherein the vision-based head-up display program implements the head-up display method as described above when executed by the processor.

[0037] The present invention further provides a display system, comprising the display device as described above.

[0038] The technical solution of the present invention divides the display area of ​​the HUD screen into a first display area and a second display area, wherein the content displayed in the first display area has a lower correlation with the road information and driving information than the second display area, that is, the first display area is a display area that the main driver pays less attention to based on the current road information and driving information. By reducing the display brightness of the first display area, the second display area with a higher correlation between the displayed content and the road information and driving information is highlighted, so that the main driver's attention can be more focused on the second display area, so that the main driver can reasonably and efficiently obtain information from the HUD screen. In addition, the technical solution of the present application also adjusts the first display area and the second display area through the facial image of the main driver, ensuring that the display area that the main driver is more concerned about at this time will not fall into the first display area, so that the technical solution of the present application can also flexibly match the main driver's information acquisition habits. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0040] Figure 1 It is a flow chart of an embodiment of a vision-based head-up display method of the present invention;

[0041] Figure 2 It is a flowchart of another embodiment of the vision-based head-up display method of the present invention;

[0042] Figure 3 It is a flowchart of another embodiment of the vision-based head-up display method of the present invention;

[0043] Figure 4 FIG. 1 is a schematic structural diagram of an embodiment of a display device of the present invention.

[0044] Description of Figure Numbers:

[0045] name Label name Label Memory 11 Communication Bus 13 processor 12

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] In actual driving, the situations faced by the driver are relatively complex and often have phased characteristics, that is, the actual situations faced at different time periods during driving are often different, which requires the driver to always maintain a high level of attention. Currently, the HUD technology displays a large number of data types and will be displayed throughout the driving process. This means that when the driving situation is relatively simple, the various data types displayed by the HUD are actually not very helpful to the driver. When the driving situation is more complicated, the driver usually has no time to pay attention to the data displayed by the HUD. On the contrary, the data displayed by the HUD at this time will cause certain interference and influence on the judgment or operation of the driver.

[0050] In view of the above problems, the present invention proposes a head-up display method based on vision. Figures 1 to 3 , the vision-based head-up display methods include:

[0051] Step S100: displaying a HUD screen having multiple display areas;

[0052] Step S200: Acquire road information and driving information of the vehicle, and determine at least one display area as a first display area according to the road information and the driving information, and use a display area other than the first display area as a second display area;

[0053] Step S300: Acquire a facial image of the driver, adjust the first display area and the second display area according to the facial image, and use the adjusted first display area as the target display area;

[0054] Step S400: determining brightness adjustment information of a target display area, and lowering the display brightness of the target display area according to the brightness adjustment information;

[0055] The relevance of the content displayed in the first display area to the road information and the driving information is greater than the relevance of the content displayed in the second display area to the road information and the driving information.

[0056] In one embodiment of the present invention, the HUD screen is divided into multiple display areas, each of which is used to display a type of information related to vehicle driving; the information can be data or prompts, which is not limited in this application. For example, multiple display areas can respectively display vehicle speed, navigation / ADAS information, projected collision warning prompts, lane departure prompts, etc.

[0057] Road information can be obtained from the backend server through vehicle communication, or from the connected smart terminal; driving information can be obtained from the vehicle's central control unit. Road information is various information indicating the current road conditions of the vehicle, including the number of lanes, virtual / solid line information between lanes, road extension information, road congestion information, road speed limit information, etc. Driving information is various information indicating the current vehicle conditions, including real-time vehicle parameter information (such as vehicle speed, remaining fuel, etc.), driver operation, vehicle driving direction, etc.

[0058] Road information and driving information can jointly reflect the driving difficulty of the vehicle on the current road, so that the display area with more information for the current road condition and driving condition can be selected from multiple display areas as the first display area, and other display areas with less information for the current road condition and driving condition can be selected as the second display area. Due to the differences in driving habits of different main drivers, the information acquisition habits of HUD are different, and there are a few main drivers who habitually pay attention to the information displayed in the first display area. The technical solution of the present application can determine the main driver's attention to the first display area and the second display area respectively by acquiring the facial image of the main driver, and then adjust the display area of ​​at least one of the first display area and the second display area based on the attention situation, for example, the display area in the first display area that the main driver pays more attention to can be adjusted to the second display area, or the display area in the second display area that the main driver pays less attention to can be adjusted to the first display area, so that the first display area and the second display area divided after the adjustment can be closer to the actual attention of the main driver and closer to the information required for actual driving, especially so that the information displayed in the adjusted first display area (i.e., the target display area) can be information that is not used by the main driver in the current driving situation.

[0059] In the technical solution of the present application, the preset brightness reduction amplitude can be called as the brightness adjustment information of the target display area, or the corresponding brightness adjustment amplitudes of the target display areas can be determined respectively through corresponding strategies, and the brightness adjustment information is used to determine the brightness reduction amplitude of the target display area. After the brightness adjustment information is determined, the display brightness of the target display area can be lowered to the corresponding amplitude according to the brightness adjustment information, and the brightness of the second display area is not adjusted. At this time, the display brightness of the second display area can be maintained at the first preset display brightness, or can be increased based on the first preset display brightness.

[0060] The technical solution of the present application is to divide the display area of ​​the HUD screen into a first display area and a second display area, wherein the content displayed in the first display area has a lower correlation with the road information and driving information than the second display area, that is, the first display area is the display area that the main driver pays less attention to based on the current road information and driving information. By reducing the display brightness of the first display area, the second display area with a higher correlation between the displayed content and the road information and driving information is highlighted, so that the main driver's attention can be more focused on the second display area, so that the main driver can reasonably and efficiently obtain information from the HUD screen. In addition, the technical solution of the present application also adjusts the first display area and the second display area through the facial image of the main driver, ensuring that the display area that the main driver is more concerned about at this time will not fall into the first display area, so that the technical solution of the present application can also flexibly match the main driver's information acquisition habits.

[0061] Reference Figure 2 In step S200: determining at least one display area as a first display area according to the road information and the driving information, including:

[0062] Step S210: determining whether the vehicle is in a special driving state according to the road information and the driving information;

[0063] Step S220: If the vehicle is in a special driving state, at least one display area among the multiple display areas is determined as the first display area according to the special driving state of the vehicle, and at least one display area among the first display areas corresponding to each special driving state is different.

[0064] The driving state of a vehicle is divided into a normal driving state and a special driving state. The special driving state is a state in which the vehicle is difficult or simple to drive, and the normal driving state is a state in which the vehicle has normal difficulty to drive. In the present application, the normal driving state and the special driving state are specifically determined as follows: the road information and driving information can be scored. The more complex the road information, the higher the road information score; the more complex the driving operation, the higher the driving information score. Finally, by judging the score interval of the sum of the road information score and the driving information score, it is judged whether it is in a special driving state or a normal driving state; the score interval corresponding to the normal driving state is in the score interval corresponding to the special driving state. In a specific embodiment, the special driving state includes: a complex driving state, a difficult driving state, and a simple driving state; the relationship between the score intervals corresponding to the special driving state and the normal driving state is as follows; the score intervals corresponding to the complex driving state, the difficult driving state, the normal driving state, and the simple driving state decrease in sequence.

[0065] In the present application, the first display areas determined by different special driving states are different, so as to ensure that there are matching first target display areas in different special driving states, thereby facilitating the improvement of the flexibility of the present application solution.

[0066] Optionally, the multiple display areas include: a driving information display area, a navigation guidance display area, an auxiliary function display area, a vehicle status display area, a prompt and warning display area, and an interconnection extension display area.

[0067] The driving information display area is used to display information such as vehicle speed data, engine speed, mileage and fuel consumption data (for example, remaining mileage, cruising range and instantaneous fuel consumption). The navigation guidance display area is used to display navigation direction (for example, turn prompts, lane guidance and remaining distance), estimated arrival time and other information. The auxiliary function display area is used to display lane keeping prompts, collision warning prompts, traffic sign recognition prompts and other information. The vehicle status display area is used to display gear information, driving mode (for example, economic mode, sports mode, four-wheel drive mode, etc.), lighting status (for example, the on / off status of high beam, fog lights, turn signals) and other information. The prompt warning display area is used to display speeding prompts, seat belt status prompts (driver or passenger seat belt wearing status), fault alarms (for example, abnormal tire pressure, engine failure) and other information. The interconnection extended display area is used to display mobile phone interconnection (for example, synchronous display of music, calls and other information), voice assistant status (response results of voice commands) and other information.

[0068] Optionally, in step S220: determining at least one display area among the multiple display areas as the first display area according to the special driving state of the vehicle includes:

[0069] Step S221: If it is determined that the vehicle is in a complex driving state, the driving information display area, the navigation guidance display area, the vehicle status display area, and the interconnection extension display area are used as the first display area;

[0070] Step S222: if it is determined that the vehicle is in a difficult driving state, the driving information display area and the interconnection extended display area are used as the first display area;

[0071] Step S223: If it is determined that the vehicle is in a simple driving state, the auxiliary function display area and the prompt warning display area are used as the first display area.

[0072] Complex driving conditions usually occur in large-scale severe traffic jams. At this time, the main driver needs to spend a lot of energy paying attention to the actual situation on the scene to control the vehicle, rather than relying on the information displayed on the HUD to control the vehicle. In addition, the information displayed in the driving information display area, navigation guidance display area, vehicle status display area, and interconnection extension display area under complex driving conditions is of little help to the main driver, and may even cause certain misleading and interference to the main driver. Therefore, at this time, the HUD screen can retain the relevant display areas with prompt functions (auxiliary function display areas and prompt warning display areas) as the second display area, and other display areas (driving information display area, navigation guidance display area, vehicle status display area, interconnection extension display area) can be used as the first display area.

[0073] Difficult driving conditions usually occur in normal traffic jams, lane reductions, lane separations, etc. At this time, the main driver needs to spend a certain amount of energy to pay attention to the actual situation, but also needs to obtain relevant information from the HUD display to avoid errors in the driving route and know the vehicle status in a timely manner. Therefore, at this time, the HUD screen can retain the navigation guidance display area, auxiliary function display area, vehicle status display area, and prompt and warning display area as the second display area, and other display areas (driving information display area, interconnection extension display area) can be used as the first display area.

[0074] The simple driving state usually occurs in high-speed driving conditions with wide lanes, long straight lanes, fewer vehicles, and high deceleration. At this time, the main driver does not need to pay too much attention to road information, and the driving operation is also extremely simple. Therefore, the HUD screen can retain the driving information display area, navigation guidance display area, vehicle status display area, and interconnection extension display area as the second display area, and use other display areas (auxiliary function display area, prompt and warning display area) as the first display area.

[0075] It should be noted that the technical solution of the present application only adjusts the brightness of the area displayed on the HUD screen, and does not mean that the relevant functions of the vehicle are turned off. For example, although the display brightness of the auxiliary function display area and the prompt warning display area will decrease in a simple driving state, the relevant auxiliary functions and relevant warning functions of the vehicle are still in the turned-on state, and will prompt the main driver in the corresponding manner when the trigger conditions are met.

[0076] Optionally, the method further comprises:

[0077] If the vehicle is in a normal driving state, the display brightness of the driving information display area, the navigation guidance display area, the auxiliary function display area, the vehicle status display area, the prompt and warning display area, and the interconnection extension display area is controlled to a first preset display brightness.

[0078] In the present application, the first preset display brightness may be the default display brightness of the HUD.

[0079] Optionally, step S400: determining brightness adjustment information of a target display area includes:

[0080] Step S410: Determine brightness adjustment information of the target display area according to the special driving state.

[0081] In the present application, different special driving states may correspond to different brightness adjustment information; or, some special driving states may correspond to one type of brightness adjustment information, and the remaining special driving states may correspond to another type of brightness adjustment information.

[0082] Specifically, step S400: determining brightness adjustment information of a target display area according to a special driving state includes:

[0083] If it is determined that the vehicle is in a complex driving state or a simple driving state, adjusting the display brightness of the target display area to a second preset display brightness;

[0084] If it is determined that the vehicle is in a difficult driving state, adjusting the display brightness of the target display area to a third preset display brightness;

[0085] The second preset display brightness is greater than 0 and lower than the third preset display brightness, and the third preset display brightness is lower than the first preset display brightness.

[0086] In this embodiment, since both the complex driving state and the simple driving state are relatively extreme conditions, the target display area obtained after screening the facial image of the main driver in this case can be confirmed as a display area that is less helpful to the main driver. Therefore, in order to avoid the target display area from affecting or interfering with the main driver as much as possible, the display brightness of the target display area is reduced to the lowest second preset display brightness. Since the conditions of the difficult driving state are not so extreme, there is a possibility that the main driver may need the information displayed in the target display area, so the target display area can be maintained at a slightly brighter second preset display brightness.

[0087] In a specific embodiment, the second preset display brightness is 20% of the first preset display brightness, and the third preset display brightness is 50% of the first preset display brightness. It should be noted that the vehicle will not always be in a special driving state. After leaving the special driving state, it is necessary to ensure that the target display area that the main driver focuses on can be restored to the second display area through the main driver's facial image after the vehicle leaves the special driving state. Therefore, the second preset display brightness in complex driving states and simple driving states cannot be set to 0. This is because once the display brightness of the target display area is set to 0, the main driver will often subconsciously think that there is no information there, and reduce the length and frequency of his sight focusing on the target display area, thereby reducing the probability of the target display area being restored to the second display area, which may lead to the HUD screen being unable to provide comprehensive information display in subsequent trips. Therefore, in this specific embodiment of the technical solution of the present application, by setting the second preset display brightness to 20% of the first preset display brightness, the target display area can be maintained at a very weak display brightness but sufficient for the main driver to know the display content of the display area, which greatly increases the possibility that the main driver will subsequently restore the target display area to the second display area through sight focusing.

[0088] Reference Figure 3 In step S300: adjusting the first display area and the second display area according to the facial image, and using the adjusted first display area as the target display area, including:

[0089] Step S310: determining the sight focus point of the main driver according to the facial image;

[0090] Step S320: Determine whether there is a first display area that meets a preset condition;

[0091] Step S330: If it exists, cancel the first display area that meets the preset condition as the first display area;

[0092] Among them, satisfying the preset conditions is: the duration of the sight focus point's stay reaches a preset duration and / or the frequency of the sight focus point's stay reaches a preset frequency.

[0093] In the present application, if the main driver's line of sight focus point meets the preset conditions, it means that the main driver pays too much attention to the first display area, which means that the main driver still relies on obtaining the display information of the first display area in the current driving state. Therefore, in order to avoid the subsequent reduction of the display brightness of the first display area and affect the main driver's acquisition of information, the first display area that meets the preset conditions is hereby adjusted to the second display area so that its display brightness can be maintained at the first preset display brightness, thereby meeting the main driver's information acquisition needs.

[0094] The present invention also provides a display device. Figure 4 , the display device comprises:

[0095] a memory 11; and

[0096] The processor 12 stores a vision-based head-up display program in the memory 11 and is executed by the processor 12 . When the vision-based head-up display program is executed by the processor 12 , the head-up display method described above is implemented.

[0097] Among them, the specific steps of the head-up display method refer to the above embodiments. Since the display device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The memory 11 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 11 can also be a storage device independent of the above display device; the processor 12 can be a CPU. The memory 11 and the processor 12 are connected by a communication bus 13, which can be a UART bus or an I2C bus.

[0098] The present invention also proposes a display system, which includes a display device. The specific structure of the display device refers to the above-mentioned embodiment. Since the display system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0099] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A head-up display method based on vision, characterized in that: The method comprises: Displaying a HUD screen with multiple display areas; Acquire road information and driving information of the vehicle, and determine at least one display area as a first display area according to the road information and the driving information, and use a display area other than the first display area as a second display area; Acquire a facial image of the driver, adjust the first display area and the second display area according to the facial image, and use the adjusted first display area as the target display area; Determine brightness adjustment information of the target display area, and lower the display brightness of the target display area according to the brightness adjustment information; The relevance of the content displayed in the first display area to the road information and the driving information is greater than the relevance of the content displayed in the second display area to the road information and the driving information.

2. The vision-based head-up display method according to claim 1, characterized in that: Determining at least one display area as a first display area according to the road information and the driving information includes: Determine whether the vehicle is in a special driving state based on road information and driving information; If the vehicle is in a special driving state, at least one display area among the multiple display areas is determined as the first display area according to the special driving state of the vehicle, and at least one display area among the first display areas corresponding to each special driving state is different.

3. The vision-based head-up display method according to claim 2, characterized in that: The special driving state includes: complex driving state, difficult driving state, and simple driving state; The multiple display areas include: a driving information display area, a navigation guidance display area, an auxiliary function display area, a vehicle status display area, a prompt and warning display area, and an interconnection extension display area.

4. The vision-based head-up display method according to claim 3, characterized in that: According to the special driving state of the vehicle, at least one display area among the plurality of display areas is determined as the first display area, including: If it is determined that the vehicle is in a complex driving state, the driving information display area, the navigation guidance display area, the vehicle status display area, and the interconnection extension display area are used as the first display area; If it is determined that the vehicle is in a difficult driving state, the driving information display area and the interconnection extended display area are used as the first display area; If it is determined that the vehicle is in a simple driving state, the auxiliary function display area and the prompt warning display area are used as the first display area.

5. The vision-based head-up display method according to claim 3, characterized in that: The method further comprises: If the vehicle is in a normal driving state, the display brightness of the driving information display area, the navigation guidance display area, the auxiliary function display area, the vehicle status display area, the prompt and warning display area, and the interconnection extension display area is controlled to a first preset display brightness.

6. The vision-based head-up display method according to claim 5, characterized in that: Determine the brightness adjustment information of the target display area, including: According to the special driving status, the brightness adjustment information of the target display area is determined.

7. The vision-based head-up display method according to claim 6, characterized in that: According to the special driving status, the brightness adjustment information of the target display area is determined, including: If it is determined that the vehicle is in a complex driving state or a simple driving state, adjusting the display brightness of the target display area to a second preset display brightness; If it is determined that the vehicle is in a difficult driving state, adjusting the display brightness of the target display area to a third preset display brightness; The second preset display brightness is greater than 0 and lower than the third preset display brightness, and the third preset display brightness is lower than the first preset display brightness.

8. The vision-based head-up display method according to any one of claims 1 to 7, characterized in that: The first display area and the second display area are adjusted according to the facial image, and the adjusted first display area is used as the target display area, including: Determine the sight focus point of the main driver according to the facial image; Determine whether there is a first display area that meets a preset condition; If it exists, the first display area that meets the preset condition is cancelled as the first display area; Among them, satisfying the preset conditions is: the duration of the sight focus point's stay reaches a preset duration and / or the frequency of the sight focus point's stay reaches a preset frequency.

9. A display device, characterized in that: include: Memory; processor; as well as, A vision-based head-up display program stored in the memory and executed by the processor, wherein the vision-based head-up display program, when executed by the processor, implements the head-up display method according to any one of claims 1 to 8.

10. A display system, characterized in that: Comprising the display device as claimed in claim 9.

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