Panoramic head-up display equipment, display brightness control method and device and medium

Abstract

The invention provides panoramic head-up display equipment, a display brightness control method and device and a medium. The control method comprises the following steps: determining a first area concerned by a driver in a display area of the panoramic head-up display; the first area is controlled to present the first brightness, a second area except the first area in the display area of the panoramic head-up display is controlled to present the second brightness, and the second brightness is smaller than the first brightness.

Description

Technical Field

[0001] This disclosure relates to the field of head-up display technology, and in particular to a panoramic head-up display device and a method, apparatus and medium for controlling display brightness. Background Technology

[0002] Head-up display (HUD) technology projects important driving information (such as vehicle speed and navigation instructions) onto the windshield in front of the driver, allowing the driver to obtain key information without taking their eyes off the road, thus improving driving safety. With the development of automotive intelligent technology, panoramic head-up displays (PHUDs), as an evolution of HUD technology, provide an ultra-wide display area spanning the driver's field of vision. Their display range typically covers the area between the A-pillars on both sides of the vehicle, possessing the potential to replace traditional instrument panels.

[0003] However, in actual driving, the driver's gaze typically only covers a portion of the PHUD display area at any given time. Yet, the PHUD keeps the entire display area brightly lit. This brightness control strategy presents several problems: First, keeping the entire display area brightly lit causes the PHUD's backlight module or projection unit (PGU) to operate under high load for extended periods, resulting in extremely high energy consumption, severe heat load, and significantly shortened lifespan of core optical components. Second, the bright areas outside the driver's gaze can cause visual interference, distracting the driver from the road ahead and posing a safety hazard. Summary of the Invention

[0004] This disclosure provides a panoramic head-up display device and a method, apparatus, and medium for controlling display brightness; it can reduce the energy consumption of the backlight module or projection unit of the PHUD, extend the service life of the core optical components in the PHUD, and reduce the display brightness of areas outside the driver's field of vision, thereby reducing visual interference and distraction to the driver and improving driving safety.

[0005] The technical solution disclosed herein is implemented as follows: In a first aspect, this disclosure provides a method for controlling display brightness, including: Identify the primary area of ​​focus for the driver within the display area of ​​the panoramic head-up display; The system controls the first area to present a first brightness, and controls the second area of ​​the panoramic head-up display, excluding the first area, to present a second brightness, which is less than the first brightness.

[0006] Secondly, this disclosure provides a display brightness control device, comprising: The determination module is configured to identify the first area of ​​driver focus within the display area of ​​the panoramic head-up display; The control module is configured to control the first area to present a first brightness, and to control the second area of ​​the panoramic head-up display, excluding the first area, to present a second brightness, which is less than the first brightness.

[0007] Thirdly, this disclosure provides a display brightness control device, comprising: a processor and a memory; the processor is configured to execute instructions stored in the memory to implement the display brightness control method as described in the first aspect.

[0008] Fourthly, this disclosure provides a panoramic head-up display device, including a brightness control device and a display device; wherein, The display device includes a display unit and a display screen; the display unit presents a display image, and the displayed image is reflected by a reflective surface projected onto the display screen, such that the reflection is perceived in the eye region; the display screen is disposed on most of the windshield and extends in front of the lower region connected to the lower edge of the windshield, providing a strip-shaped display area. The display brightness control device is configured to execute the display brightness control method described in the first aspect to control the brightness of the display area.

[0009] Fifthly, this disclosure provides a computer-readable storage medium storing at least one instruction that is executed by a processor to implement the display brightness control method described in the first aspect.

[0010] This disclosure provides a panoramic head-up display (PHUD) device, as well as a method, apparatus, and medium for controlling display brightness. Within the display area of ​​the PHUD device, the brightness values ​​of a first area of ​​user focus and a second area of ​​user non-user focus are adaptively controlled. Increasing the brightness of the first area allows the user to clearly read information within that area, while decreasing the brightness of the second area avoids visual interference for the user. This not only reduces the energy consumption of the PHUD device's display unit and extends the lifespan of the core optical components in the PHUD, but also reduces visual interference and distraction for the driver, improving driving safety. Attached Figure Description

[0011] Figure 1 This is a longitudinal sectional view of a vehicle equipped with a PHUD device, as provided in this disclosure.

[0012] Figure 2This is a schematic diagram of the interior of a vehicle equipped with a PHUD device, as seen from the driver's perspective.

[0013] Figure 3 This is a schematic flowchart of a display brightness control method provided in this disclosure.

[0014] Figure 4 This is a schematic diagram illustrating the division of a first region and a second region within a display area, as provided in this disclosure.

[0015] Figure 5 This is a schematic diagram of the backlight partitioning of the display area provided in this disclosure.

[0016] Figure 6 A flowchart illustrating the process for determining the first region provided in this disclosure.

[0017] Figure 7 This is a schematic diagram showing a first region provided by the present disclosure.

[0018] Figure 8 This is another schematic diagram showing the first region provided in this disclosure.

[0019] Figure 9 This is a schematic diagram of a display transition area provided in this disclosure.

[0020] Figure 10 This is another schematic diagram of a display transition area provided by this disclosure.

[0021] Figure 11 A schematic diagram illustrating the reduction in the size of the first region provided in this disclosure.

[0022] Figure 12 A schematic diagram showing the increase in the size of the first region provided in this disclosure.

[0023] Figure 13 This is a schematic diagram of the composition of the display brightness control device provided in this disclosure.

[0024] Figure 14 A block diagram of the display brightness control device provided in this disclosure. Detailed Implementation

[0025] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0026] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0027] Please see Figure 1 and Figure 2 This disclosure details the vehicle hardware environment in which the panoramic head-up display (PHUD) device 100 provided herein can be implemented. In this disclosure, the vehicle can be any type of vehicle, including but not limited to various types of automobiles, car-based utility vehicles (CUVs), sport utility vehicles (SUVs), trucks, recreational vehicles (RVs), or other mobile machinery used for transporting people or goods.

[0028] In many cases, the vehicles mentioned in this disclosure can also be hybrid electric vehicles (HEVs) powered by both an internal combustion engine and one or more electric motors, such as series hybrid electric vehicles (SHEVs), plug-in hybrid electric vehicles (PHEVs), and power-split hybrid electric vehicles (PSHEVs). Alternatively, the vehicle equipped with the PHUD device 100 can also be an electric vehicle (EV) that uses an electric motor as its power source, or other mobile machinery used for transporting people or goods.

[0029] Figure 1 This is a longitudinal sectional view of a vehicle equipped with a panoramic head-up display (PHUD) device 100. Figure 2 This is a schematic diagram viewed from the perspective of a motor vehicle driver.

[0030] like Figure 1 and Figure 2As shown, the PHUD device 100 includes a display device and a display control device 130. The display device includes a display unit 110 and a display screen 120. The display unit 110, such as a high-brightness liquid crystal display (LCD) unit, a micro-LED display unit, or a projector, is arranged in a recess 210 above the dashboard 200, with its display surface 111 facing upwards to avoid direct glare to the driver. The display unit 110 is located below the section of the windshield 300 that serves as the display screen 120.

[0031] The lower portion of the windshield 300 may be configured as a reflective area to form the display screen 120. In other embodiments, the display screen 120 may also be constructed separately from the windshield 300.

[0032] The display screen 120 may extend over most of the width of the windshield 300 over the lower region of the windshield 300. The display screen 120 is constructed to be at least partially transparent and has a black printed area 310 in the lower region. The black printed area 310 generally has a height between 5 and 30 cm from the lower edge of the windshield 300.

[0033] The upper side of the display screen 120 may be substantially flush with the upper side of the black printed area 310 of the windshield 300 or vertically located below the black printed area 310. In particular, the upper and lower edges of the display screen 120 may be curved to correspondingly mimic the curvature of the windshield 300 along the width of the vehicle. The width of the display screen 120 is sufficient to span between the A-pillars on both sides of the vehicle, providing an extra-wide, strip-shaped display area 400. This display area 400 is the target area for brightness control as disclosed herein.

[0034] The display unit 110 is controlled by the display control device 130 to output a desired projected image, which is focused onto the user's eye area B after being reflected by the display screen 120, so that the user inside the vehicle can perceive it.

[0035] The display control device 130 can be implemented as a dedicated electronic control unit (ECU) or as a functional module integrated into the vehicle's smart cockpit domain controller or central computing platform.

[0036] In some examples, the display control device 130 is connected to one or more information sources via an in-vehicle network (e.g., Controller Area Network (CAN) bus, in-vehicle Ethernet, etc.) to interact with information in order to perform the display control method provided in this disclosure. These information sources include, but are not limited to: The vehicle control unit (VCU) or powertrain control module acquires data that constitutes the core state information of the vehicle, especially real-time vehicle speed.

[0037] Advanced Driving Assistance System (ADAS) module: This module can acquire perception and warning information closely related to driving safety, as well as driving scenario information, such as highways and urban roads.

[0038] The navigation module can obtain the vehicle's precise location information, planned navigation route, real-time traffic conditions, and crucial turn-by-turn (TBT) instructions, such as "turn right in 500 meters" and recommended lane information.

[0039] The Body Control Module (BCM) can acquire vehicle body status information, such as the open / closed status of each door, front / rear trunk, and charging port cover, as well as the status of whether the seat belts of each seat are fastened.

[0040] The in-vehicle infotainment (IVI) system can acquire entertainment-related information, such as incoming call signals and call status from a mobile phone connected via Bluetooth, media information such as the title, artist, album cover, and lyrics of the music currently playing, and environmental information such as the current time, date, and weather forecast obtained through a network connection.

[0041] Driver Monitoring System (DMS): Used to acquire the driver's eye position coordinates, angle, or head posture.

[0042] External light intensity sensing module: used to obtain external light intensity or ambient brightness.

[0043] In this disclosure, the display unit 110 can be implemented with a display screen featuring backlight zoning, including pixel-level zoning and region-level zoning. Specifically, when the display unit 110 uses self-emissive technology, such as a Micro-LED or AMOLED screen, the smallest unit of backlight zoning can be one pixel (1px). In this case, the display control device 130 can achieve the finest pixel-level brightness control. When the display unit 110 uses backlight zoning technology, such as a Mini-LED backlit LCD display or local dimming based on a DLP / LCOS PGU, multiple pixels (n) are assigned to a backlight region (Local Dimming Zone) with independently controllable brightness. It is understood that the technical solutions of this disclosure are applicable to the above two and other similar zoning methods.

[0044] Figure 3 This is a schematic flowchart illustrating a method for controlling display brightness according to the present disclosure. This method can be executed by a PHUD device 100 or by a display control device 130 within the PHUD device 100.

[0045] See Figure 3 In step S310, a first area of ​​interest to the driver is determined in the display area of ​​the panoramic head-up display.

[0046] In this disclosure, Figure 4 This is a schematic diagram of the display area 400 of the PHUD device 100. Understandably, this display area 400 is the same size as the display screen 120, essentially covering the width of the black printed area 310 at the bottom of the windshield 300, which is the user's field of vision extending from the left A-pillar to the right A-pillar of the vehicle. Within such a wide display area, the driver cannot cover the entire PHUD display area 400, but only a portion of it. Based on this, the display control device 130 determines the area of ​​interest (AOI) currently of interest to the user within the display area 400 as the first area 410.

[0047] In step S320, the first region is controlled to present a first brightness.

[0048] In this disclosure, after the display control device 130 determines the first region, it can send a first control command to the display unit 110. This first control command enables the display unit 110 to display a preset high brightness within the physical area corresponding to the first region 410, i.e., the first brightness described in step S320. Specifically, this first brightness ensures that the driver can clearly read the information within the first region.

[0049] In step S330, the second area of ​​the panoramic head-up display, excluding the first area, is controlled to present a second brightness.

[0050] In this disclosure, in addition to the first control command, the display control device 130 can also send a second control command to the display unit 110, which enables the display unit 110 to display a second brightness value that is lower than the first brightness in the second area 420, which is outside the first area 410, i.e., the physical range corresponding to the area that the user is not currently paying attention to, within the display area 400.

[0051] In this disclosure, the second brightness can be set to zero, meaning the display unit 110 sets the second area 420 to a dark state or no light emission, in order to minimize energy consumption and visual interference to the user. In some examples, the second brightness can also be set to a very low brightness value to maintain the overall visual continuity of the display area 400.

[0052] In detail, when the display unit 110 employs self-emissive technology so that the smallest unit of the backlight partition can be one pixel (1px), the display control device 130 can define the first region 410 as a set of pixel coordinates. Furthermore, the display control device 130 sends a control command to the display unit 110 to set the brightness of the pixels within that set to a first brightness, and to set the brightness of the pixels outside that set, i.e., the second region 420, to a second brightness.

[0053] When the display unit 110 employs a backlight partitioning technique to group multiple pixels into a single backlight area with independently controllable brightness, the display control device 130 can determine at least one backlight area of ​​interest to the user from all backlight areas of the display area 400, thereby forming a first area 410. The display control device 130 also determines the other backlight areas in the display area 400 besides forming the first area as second areas 420. The display control device 130 sets all backlight areas forming the first area 410 to a first brightness, and sets the brightness of the remaining backlight areas, i.e., the second areas, to a second brightness.

[0054] pass Figure 3 The technical solution described herein adaptively controls the brightness values ​​of a first area of ​​user focus and a second area of ​​non-user focus within the display area of ​​the PHUD device. By increasing the brightness of the first area, the user can clearly read the information within that area, while by decreasing the brightness of the second area, visual interference is avoided. This not only reduces the energy consumption of the PHUD device's display unit and extends the lifespan of the core optical components in the PHUD, but also reduces visual interference and distraction for the driver, improving driving safety.

[0055] In some examples, the PHUD device performs an initialization process after the vehicle starts. This initialization process establishes the computational basis for dividing the display area into a first region and a second region. This initialization process may include: when the vehicle starts, the PHUD device 100 also starts; the display control device 130 can control the display unit 110 to perform a self-test in a fully backlit manner, and perform geometric calibration and coordinate mapping, thereby constructing a coordinate system for the calculation of dividing the first and second regions.

[0056] Specifically, taking backlight zoning as an example, Figure 5 This is a schematic diagram of the backlight partitioning for a display area of ​​400. Figure 5 In the diagram, each small square represents a backlight zone. For example... Figure 5 As shown, the horizontal width of the display area 400 is The number of horizontal backlight zones is Therefore, it can be seen that the ratio of the number of backlight zones in the horizontal direction of the display area 400 to the horizontal dimension is... The vertical width of the display area is 400. The number of backlight zones in the vertical direction is Therefore, it can be seen that the ratio of the number of backlight zones in the horizontal direction of the display area 400 to the horizontal dimension is... .

[0057] In the above initialization process, after the PHUD device 100 is started, the display control device 130 controls the display unit 110 to activate all backlight zones, i.e. Figure 5 All small squares are highlighted for self-checking. Then, geometric calibration and coordinate mapping are performed to construct a coordinate system. Specifically, this disclosure maps the vehicle coordinate system to construct a coordinate system for calculations involving the division of the first and second regions. For example... Figure 5 As shown in the upper left corner, the X-direction of the constructed coordinate system is the horizontal direction of the display area 400, which is the width direction of the vehicle; the Z-direction is the vertical direction of the display area 400, which is the height direction of the vehicle; and the Y-direction is the forward direction of the vehicle. After constructing the coordinate system, the origin O of the constructed coordinate system is set according to the initial position of the driver's eye point, and the distance between the origin O and the left edge of the display area 400 is set to... The distance from the right edge of the display area 400 is And it is located in the middle of the display area along a height of 400, such as Figure 5 As shown, the origin O is located in the X direction at the 400-degree angle from left to right in the display area. The right edge of each backlight zone has its origin in the Y direction at the intersection of the vehicle's length axis and the display screen 120. Its origin O in the Z direction is located at the point counting from top to bottom within display area 400. The lower edge of each backlight zone.

[0058] In some examples, the process by which the display control unit 130 determines the first area of ​​interest for the driver within the display area of ​​the panoramic head-up display is as follows: Figure 6 As shown, the process may include: In step S311, the driver's eye position, eye projection angle, and field of view angle are acquired in real time.

[0059] Specifically, the driver's eye position, eye projection angle, and visual field angle can be monitored by the driver's eye detection module.

[0060] For example, eye position and eye projection angle can be obtained through infrared DMS monitoring. This camera uses eye-tracking algorithms to acquire the driver's eye position in the vehicle coordinate system and the three-dimensional projection vector of the gaze, i.e., the eye projection angle. Alternatively, eye position and eye projection angle can also be determined using the RGB cameras already installed in the vehicle, employing computer vision (CV) algorithms for head pose estimation. The field of view (VA) is used to represent the effective visual range from which the driver can clearly distinguish information, for example, 20° to 30°.

[0061] In step S312, the center point of the first region is determined based on the eye point position, the eye point projection angle, and the preset projection distance.

[0062] In this disclosure, the preset projection distance L refers to the effective optical projection distance from the driver's eyebox position to the display area 400 formed by the PHUD. Based on the eyebox position, the eyebox projection angle, and the preset projection distance, the intersection point of the line of sight vector and the display area 400 can be calculated, and this intersection point is determined as the center point position of the first area.

[0063] In step S313, the width of the first region is determined based on the field of view angle.

[0064] In this disclosure, the width of the first region can be calculated using trigonometric functions based on the viewing angle and a preset projection distance.

[0065] Understandably, once the center point and width of the first area are obtained, the first area that the driver is concerned about can be determined.

[0066] for Figure 6 The example shown, Figure 7 In the diagram, A and B represent the first region as seen from the driver's observation view and the overhead view, respectively. Figure 7 In the middle, the driver looks straight ahead, and the eye-point projection angle is 0. The eye-point position, the preset projection distance L, and the field of view angle are all considered. like Figure 7 As shown in B, the initial eyepoint position is set when the driver is looking straight ahead. Figure 5 The coordinates shown in the coordinate system are .based on Figure 6 The process shown utilizes the eye-point projection angle, eye-point position, preset projection distance, and field of view. Determine the width of the first region, such as Figure 7 As shown in B, the coordinates of the intersection point of the view area and the left side of the display area 400, i.e., the left endpoint of the first region in the display area 400, are: The rightmost intersection of the viewpoint and the display area 400, i.e., the rightmost endpoint of the first region within the display area 400, is... , and The distance between them is the width of the first region. (Combined) Figure 5 The ratios of the number of backlight zones shown to the horizontal and vertical dimensions respectively determine the range of the backlight zones covered by the first region. The display control device 130 can then control the backlight zones covered by the first region to display a first brightness, such as... Figure 7 The diagonal lines in the text indicate that the backlight zones covered by the second area, excluding the first area, will exhibit a second brightness, as shown in the example. Figure 7 The blanks in the text are filled as shown.

[0067] During vehicle operation, the driver does not maintain a constant gaze straight ahead; their gaze typically shifts. For example, when turning right, the driver may turn their eyes or head to the right, and their gaze will follow. In such situations, the display control device 130, after acquiring real-time data on changes in the driver's eye position, eye projection angle, and visual field angle, will also adjust accordingly. Figure 6 The process shown redefines the first region. For example... Figure 8 As shown, compared to Figure 7 When the driver (with their initial gaze forward) turns their eyes or head to the right, the system detects in real time that the eye point projection angle is deflected to the right. °, such as Figure 8 As shown in B, the field of view angle is still... Real-time position of the eye point, such as Figure 8 As shown in A and B, the coordinates are... Using these parameters, the display control device 130 can recalculate the new center point position.

[0068] Specifically, a rightward shift of the line of sight is considered positive, and a leftward shift is considered negative. The amount of shift in the center point position is determined by... Calculated. For example... Figure 8 As shown in A and B, the new center point position is relative to... Figure 7 The center point in the middle has shifted to the right. The width, and the coordinates of the new center point are .

[0069] The first zone moves to the right as the driver's line of sight moves from directly in front of them. The backlight zones covered by this first zone after the movement are as follows: Figure 8 As shown, the backlight zone is controlled to be in a high-brightness state by the display control device 130, such as... Figure 8 As shown by the diagonal fill in the image, this makes it a highlighted area, and controls the backlight zones covered by the second area (excluding the moved first area) to exhibit a second brightness, as shown in the image. Figure 8 The blanks in the text are filled as shown.

[0070] Specifically, after the line of sight shifts, the coordinates of the left intersection point of the field of view and the display area 400 are: The right-side intersection of the field of view and the display area 400 is... Still taking the right-hand direction as the positive direction, when... At that time, the number of partitions in the horizontal direction of the highlighted area Depend on Calculated. When At that time, the number of partitions in the horizontal direction of the highlighted area Depend on This was calculated. Therefore, the highlighted area is defined by points within the display area 400. Centered on the center, the number of highlighted sections in the horizontal direction is The number of highlighted sections in the vertical direction is The area.

[0071] Understandably, by monitoring the driver's eye position and eye projection angle in real time, the display control device 130 can calculate the center position of the new first area based on the monitored eye position and eye projection angle, and then calculate the width of the new first area by combining the field of view angle and the preset projection distance, thereby determining the new first area. In other words, the display control device 130 can adjust the position of the first area within the display area 400 in real time according to the deviation of the driver's line of sight.

[0072] In some examples, to avoid abrupt changes in brightness between the first brightness of the first area and the second brightness of the second area, which could cause a visual abruptness for the driver. Figure 3 The method for controlling the display brightness may further include: defining one or more transition regions between the first region and the second region; and controlling the one or more transition regions to present a third brightness, which is less than the first brightness and greater than the second brightness.

[0073] Specifically, in passing Figure 3 After determining the first and second regions, the display control device 130 does not abruptly change the brightness from the first brightness to the second brightness at the boundary between the first and second regions. Instead, it determines one or more transition regions between the first and second regions. The range of the transition regions, such as their width, can be determined by a preset number of partitions. This parameter is used to indicate that... It is a preset parameter whose value can be set according to different PHUD products, such as different partition densities. In addition, the width of the transition areas on both sides of the first area can also be different.

[0074] like Figure 9 As shown, transition regions are located at the boundaries of the first region and the second region on both sides. Taking the transition regions on both sides of the first region as having the same width as an example, in this disclosure, to avoid abrupt changes in brightness, the third brightness of the transition region is controlled to be greater than the second brightness but less than the first brightness, such as... Figure 9 As shown, each small square represents a backlight zone. The darker the gray level filled in the small square, the lower the brightness. It can be seen that the brightness of the backlight zone covered by the first area is greater than the brightness of the backlight zone covered by the transition area, while the brightness of the backlight zone covered by the transition area is greater than the brightness of the backlight zone covered by the second area.

[0075] In addition to setting the backlight zones covered by the transition area to a uniform brightness, the display control device can also set the third brightness of the transition area to a gradient brightness from the first brightness to the second brightness. For example... Figure 10 As shown, in the transition region, the brightness of the backlight zones along the X direction from the boundary of the first region to the boundary of the second region gradually decreases.

[0076] Specifically, the brightness coefficient of the first region is set to... The brightness coefficient of the second region is The number of partitions in the transition region is So in the transition region, the first Brightness coefficient of each zone It is calculated by the following formula: .

[0077] from Figure 10As can be seen, the display control device sets the third brightness of the transition area to a gradient brightness from the first brightness to the second brightness, which enables a natural brightness transition between the first and second areas, avoids visual flickering or discomfort that may be caused by sudden brightness changes, and significantly improves the user experience.

[0078] In some examples, the area of ​​the driver's attention changes depending on the vehicle's movement; for instance, the area of ​​the driver's attention narrows when the vehicle is traveling at high speed and expands when the vehicle is traveling slowly. Based on this, Figure 3 The method for controlling the display brightness may further include: acquiring the current driving status of the vehicle; and adjusting the size of the first area based on the driving status.

[0079] In this disclosure, the current driving state of the vehicle may include the real-time vehicle speed. Accordingly, based on the driving state, adjusting the size of the first region may include: reducing the width of the first region when the real-time vehicle speed increases; and increasing the width of the first region when the real-time vehicle speed decreases.

[0080] Specifically, with Figure 9 As shown below, the vehicle's speed is set to [value]. As vehicle speed increases, such as on a highway where the real-time speed gradually rises, the driver's field of vision gradually narrows, resulting in a shrinking area of ​​focus. In this situation, the display control device 130 can reduce the size of the first area, for example... Figure 11 As shown, compared to Figure 9 Reduce the width of the first region.

[0081] Still with Figure 9 As shown below, the vehicle's speed is set to [value]. As vehicle speed decreases, such as when turning at an intersection or traveling at low speed, the real-time vehicle speed gradually decreases, and the driver's field of vision gradually increases, thus increasing the area of ​​focus. In this situation, the display control device 130 can increase the size of the first area, for example... Figure 12 As shown, compared to Figure 9 Increase the width of the first region.

[0082] In detail, the maximum speed of the vehicle is set to The width influence coefficient corresponding to the maximum vehicle speed is The minimum speed of the vehicle is The width influence coefficient corresponding to the minimum vehicle speed is Thus, when the car speed is At that time, the influence coefficient of the vehicle speed It is calculated by the following formula: .

[0083] When the vehicle speed is At that time, the number of horizontal partitions in the first region is .

[0084] This example demonstrates how the control device 130 correlates the width of the first area with driving risks, such as vehicle speed, thereby improving safety. At high speeds, the driver's effective field of vision narrows; reducing the width of the first area helps the driver focus their attention on the road conditions directly ahead. At low speeds, such as when turning or parking, the driver requires a wider field of vision; increasing the width of the first area matches the need for a wider range of observation.

[0085] In some examples, this is done to improve the overall display brightness of the display area 400 and its adaptability to the external environment. Figure 3 The method for controlling the display brightness may further include: acquiring environmental information of the current vehicle environment; and controlling the first brightness and the second brightness based on the environmental information.

[0086] In this disclosure, in addition to the first brightness and the second brightness, the display control device 130 can also control the third brightness based on the environmental information.

[0087] For example, the environmental information may include ambient brightness, which can be detected in real time by the vehicle exterior light intensity sensing module and transmitted to the display control device 130. When the ambient brightness increases, such as when a vehicle exits a tunnel during the day, the display control device 130 drives the display unit 110 to increase the first brightness, the second brightness, and the third brightness, ensuring that the display area remains clearly visible under strong light. When the ambient brightness decreases, such as when a vehicle enters a tunnel during the day or at night, the display control device 130 drives the display unit 110 to decrease the first brightness, the second brightness, and the third brightness, preventing glare to the driver from the display area 400 in low-light environments.

[0088] Specifically, the influence coefficient of the external ambient brightness is set as follows: The greater the ambient light intensity, The larger the value, the better. Furthermore, the brightness coefficient of the first region is set to... The brightness coefficient of the second region is The first in the transition region The luminance coefficient of each zone is , This is the reference brightness for the backlight zones. Therefore, the brightness of the first zone is... The brightness of the second region is The first in the transition region The brightness of each partition is .

[0089] Based on the same inventive concept as the aforementioned technical solutions, this disclosure provides a display brightness control device. This device can be implemented as a display control device 130, or as a functional module within the display control device 130. Figure 13 This is a schematic diagram of the components of the display brightness control device. (See also...) Figure 13 The display brightness control device 1300 may include: The determination module 1301 is configured to determine a first region within the display area of ​​the panoramic head-up display; The control module 1302 is configured to control the first area to present a first brightness, and to control a second area of ​​the panoramic head-up display, excluding the first area, to present a second brightness, which is less than the first brightness.

[0090] In some examples, the determination module 1301 is configured to: acquire the driver's eye point position, eye point projection angle, and field of view angle in real time; determine the center point position of the first region based on the eye point position, eye point projection angle, and preset projection distance; and determine the width of the first region based on the field of view angle.

[0091] In some examples, the determining module 1301 is also configured to: determine one or more transition regions between the first region and the second region; The control module 1302 is also configured to control one or more transition regions to present a third brightness, which is less than the first brightness and greater than the second brightness.

[0092] In some examples, the third brightness is a gradient brightness from the first brightness to the second brightness.

[0093] In some examples, the control module 1302 is also configured to: obtain the current driving status of the vehicle; and adjust the size of the first region based on the driving status.

[0094] In some examples, this driving state includes real-time vehicle speed; control module 1302 is configured to: When the real-time vehicle speed increases, the width of the first zone decreases; and When the real-time vehicle speed decreases, the width of the first region is increased.

[0095] In some examples, the control module 1302 is also configured to: acquire environmental information of the current vehicle environment; and control the first brightness and the second brightness based on the environmental information.

[0096] In some examples, this environmental information includes ambient brightness; control module 1302 is configured to: When the ambient brightness increases, increase the first brightness and the second brightness; and When the ambient brightness decreases, reduce the first and second brightness levels.

[0097] Please see Figure 14 This illustrates a structural block diagram of a display brightness control device 1300 provided in an exemplary embodiment of this disclosure. Figure 14 As shown, the display brightness control device 1300 in this disclosure may include one or more of the following components: processor 1410 and memory 1420.

[0098] Optionally, the processor 1410 connects various parts within the computing device using various interfaces and lines, and performs various functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in the memory 1420, and by calling data stored in the memory 1420. Optionally, the processor 1410 can be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 1410 can integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), Neural-network Processing Unit (NPU), and baseband chip. Specifically, the CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required to be displayed on the touch screen; the NPU is used to implement Artificial Intelligence (AI) functions; and the baseband chip is used to handle wireless communication. It is understandable that the aforementioned baseband chip may not be integrated into the processor 1410, but may be implemented as a separate chip.

[0099] The memory 1420 may include random access memory (RAM) or read-only memory (ROM). Optionally, the memory 1420 may include a non-transitory computer-readable storage medium. The memory 1420 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 1420 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the various method embodiments described above, etc.; the data storage area may store data created according to the use of the computing device, etc.

[0100] In addition, those skilled in the art will understand that the structure of the computing device shown in the above figures does not constitute a limitation on the computing device. The computing device may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, the computing device may also include a display screen, camera assembly, microphone, speaker, radio frequency circuit, input unit, sensors (such as accelerometer, angular velocity sensor, light sensor, etc.), audio circuit, WiFi module, power supply, Bluetooth module, etc., which will not be described in detail here.

[0101] This disclosure also provides a computer-readable storage medium storing at least one instruction that is executed by a processor to implement the display brightness control method described in the above embodiments.

[0102] This disclosure also provides a computer program product including computer instructions stored in a computer-readable storage medium; a processor of a computing device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computing device to perform the display brightness control method described in the above embodiments.

[0103] Those skilled in the art will recognize that the functions described in this disclosure in one or more of the examples above can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0104] It should be noted that the technical solutions described in this disclosure can be combined arbitrarily as long as they do not conflict.

[0105] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for controlling display brightness, characterized in that, The control method includes: Identify the primary area of ​​focus for the driver within the display area of ​​the panoramic head-up display; The first area is controlled to present a first brightness, and the second area of ​​the panoramic head-up display, excluding the first area, is controlled to present a second brightness, wherein the second brightness is less than the first brightness.

2. The control method according to claim 1, characterized in that, Determining the first area of ​​driver focus within the display area of ​​the panoramic head-up display includes: Real-time acquisition of the driver's eye position, eye projection angle, and visual field angle; Based on the eye point position, the eye point projection angle, and the preset projection distance, the center point position of the first region is determined; The width of the first region is determined based on the viewing angle.

3. The control method according to claim 1, characterized in that, The method further includes: One or more transition regions are defined between the first region and the second region; and The one or more transition regions are controlled to present a third brightness, which is less than the first brightness and greater than the second brightness, and the third brightness is a gradient brightness from the first brightness to the second brightness.

4. The control method according to claim 1, characterized in that, The method further includes: Obtain the current driving status of the vehicle; Based on the driving state, adjust the size of the first area.

5. The control method according to claim 4, characterized in that, The driving status includes real-time vehicle speed; adjusting the size of the first region based on the driving status includes: When the real-time vehicle speed increases, the width of the first region decreases; and When the real-time vehicle speed decreases, the width of the first region is increased.

6. The control method according to claim 1, characterized in that, The method further includes: Obtain information about the current environment in which the vehicle is located; Based on the environmental information, the first brightness and the second brightness are controlled.

7. The control method according to claim 6, characterized in that, The environmental information includes ambient brightness, and the step of controlling the first brightness and the second brightness based on the environmental information includes: When the ambient brightness increases, the first brightness and the second brightness are increased; and When the ambient brightness decreases, the first brightness and the second brightness are reduced.

8. A device for controlling display brightness, characterized in that, The control device includes: a determining module and a control module; wherein... The determining module is configured to determine a first area of ​​driver attention within the display area of ​​the panoramic head-up display; The control module is configured to control the first area to present a first brightness, and to control a second area of ​​the panoramic head-up display, excluding the first area, to present a second brightness, wherein the second brightness is less than the first brightness.

9. The control device according to claim 8, characterized in that, The determining module is further configured to determine one or more transition regions between the first region and the second region; The control module is further configured to control the one or more transition regions to present a third brightness, the third brightness being less than the first brightness and greater than the second brightness, and the third brightness being a gradient brightness from the first brightness to the second brightness.

10. A device for controlling display brightness, characterized in that, The display brightness control device includes a processor and a memory; the processor is used to execute instructions stored in the memory to implement the display brightness control method as described in any one of claims 1 to 7.

11. A panoramic head-up display device, characterized in that, The panoramic head-up display device includes a brightness control device and a display device; wherein... The display device includes a display unit and a display screen; the display unit presents a display image, and the displayed image is reflected by a reflective surface projected onto the display screen, such that the reflection is perceived in the eye region; the display screen is disposed on most of the windshield and extends in front of a lower region connected to the lower edge of the windshield, providing a strip-shaped display area. The display brightness control device is configured to perform the display brightness control method as described in any one of claims 1 to 7 to control the brightness of the display area.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one instruction, which is executed by a processor to implement the display brightness control method according to any one of claims 1 to 7.

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